@charset "UTF-8";
:root {
  --color-bg: #F7F3ED;
  --color-bg-elevated: #FCF9F4;
  --color-bg-alt: #F0EBE2;
  --color-surface: #FFFCF5;
  --color-surface-hover: #F5F0E8;
  --color-surface-elevated: #FFFCF5;
  --color-surface-strong: #E8E0D4;
  --color-primary: #4A6B7B;
  --color-primary-hover: #3A5A6A;
  --color-primary-muted: rgba(74, 107, 123, 0.1);
  --color-primary-strong: rgba(74, 107, 123, 0.22);
  --color-primary-glow: rgba(74, 107, 123, 0.12);
  --color-success: #5B7F6A;
  --color-success-muted: rgba(91, 127, 106, 0.1);
  --color-success-glow: rgba(91, 127, 106, 0.12);
  --color-warning: #A67C52;
  --color-warning-muted: rgba(166, 124, 82, 0.1);
  --color-warning-glow: rgba(166, 124, 82, 0.12);
  --color-danger: #9A5C5C;
  --color-danger-muted: rgba(154, 92, 92, 0.1);
  --color-danger-glow: rgba(154, 92, 92, 0.12);
  --color-text-primary: #2C2416;
  --color-text-secondary: #5D5242;
  --color-text-muted: #8A7D6B;
  --color-text-inverse: #F7F3ED;
  --color-border: rgba(44, 36, 22, 0.1);
  --color-border-strong: rgba(44, 36, 22, 0.18);
  --color-border-focus: rgba(74, 107, 123, 0.4);
  --focus-ring: 0 0 0 2px #FFFCF5, 0 0 0 4px var(--color-primary);
  --color-bg-code: #F0EBE2;
  --color-bg-code-inline: rgba(74, 107, 123, 0.08);
  --color-text-code: #4A6B7B;
  --overlay-backdrop: rgba(44, 36, 22, 0.4);
  --overlay-backdrop-strong: rgba(44, 36, 22, 0.6);
  --shadow-xs: 0 1px 2px rgba(44, 36, 22, 0.06);
  --shadow-sm: 0 2px 6px rgba(44, 36, 22, 0.08);
  --shadow-md: 0 6px 18px rgba(44, 36, 22, 0.08);
  --shadow-lg: 0 12px 32px rgba(44, 36, 22, 0.10);
  --shadow-xl: 0 20px 48px rgba(44, 36, 22, 0.12);
  --shadow-glow: 0 0 0 1px var(--color-primary-muted), 0 8px 32px rgba(44, 36, 22, 0.08);
  --shadow-glow-sm: 0 0 0 1px var(--color-primary-muted), 0 2px 8px rgba(44, 36, 22, 0.06);
  --shadow-glow-primary: 0 0 24px var(--color-primary-glow);
  --shadow-glow-success: 0 0 24px var(--color-success-glow);
  --shadow-glow-warning: 0 0 24px var(--color-warning-glow);
  --shadow-paper: 0 1px 3px rgba(44, 36, 22, 0.06), 0 4px 12px rgba(44, 36, 22, 0.04);
  --card-border: var(--color-border);
  --card-shadow: var(--shadow-md);
  --card-shadow-hover: var(--shadow-lg);
  --card-radius: 8px;
  --card-radius-sm: 6px;
  --card-padding: 20px 24px;
  --card-gap: 16px;
  --font-serif: 'Literata', 'Georgia', 'Times New Roman', serif;
  --font-sans: 'Inter', 'Geist', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Geist Mono', 'SF Mono', 'Fira Code', monospace;
  --font-hand: 'Caveat', 'Patrick Hand', cursive;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3.5rem;
  --leading-tight: 1.15;
  --leading-snug: 1.35;
  --leading-normal: 1.6;
  --leading-relaxed: 1.75;
  --weight-normal: 400;
  --weight-medium: 500;
  --weight-semibold: 600;
  --weight-bold: 700;
  --tracking-tight: 0;
  --tracking-normal: 0;
  --tracking-wide: 0.04em;
  --space-0: 0;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 10px;
  --radius-full: 9999px;
  --transition-fast: 120ms ease-out;
  --transition-base: 200ms ease-out;
  --transition-slow: 300ms ease-out;
  --transition-spring: 400ms cubic-bezier(0.34, 1.56, 0.64, 1);
  --container-narrow: 640px;
  --container-normal: 780px;
  --container-wide: 1200px;
  --container-full: 100%;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-fixed: 300;
  --z-modal-backdrop: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-tooltip: 700;
  --z-toast: 800;
  --z-nav: 999;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme=dark]) {
    --color-bg: #F7F3ED;
    --color-bg-elevated: #FCF9F4;
    --color-bg-alt: #F0EBE2;
    --color-surface: #FFFCF5;
    --color-surface-hover: #F5F0E8;
    --color-surface-elevated: #FFFCF5;
    --color-surface-strong: #E8E0D4;
    --color-primary: #4A6B7B;
    --color-primary-hover: #3A5A6A;
    --color-primary-muted: rgba(74, 107, 123, 0.1);
    --color-primary-strong: rgba(74, 107, 123, 0.22);
    --color-primary-glow: rgba(74, 107, 123, 0.12);
    --color-success: #5B7F6A;
    --color-success-muted: rgba(91, 127, 106, 0.1);
    --color-success-glow: rgba(91, 127, 106, 0.12);
    --color-warning: #A67C52;
    --color-warning-muted: rgba(166, 124, 82, 0.1);
    --color-warning-glow: rgba(166, 124, 82, 0.12);
    --color-danger: #9A5C5C;
    --color-danger-muted: rgba(154, 92, 92, 0.1);
    --color-danger-glow: rgba(154, 92, 92, 0.12);
    --color-text-primary: #2C2416;
    --color-text-secondary: #5D5242;
    --color-text-muted: #8A7D6B;
    --color-text-inverse: #F7F3ED;
    --color-border: rgba(44, 36, 22, 0.1);
    --color-border-strong: rgba(44, 36, 22, 0.18);
    --color-border-focus: rgba(74, 107, 123, 0.4);
    --focus-ring: 0 0 0 2px #FFFCF5, 0 0 0 4px var(--color-primary);
    --color-bg-code: #F0EBE2;
    --color-bg-code-inline: rgba(74, 107, 123, 0.08);
    --color-text-code: #4A6B7B;
    --overlay-backdrop: rgba(44, 36, 22, 0.4);
    --overlay-backdrop-strong: rgba(44, 36, 22, 0.6);
    --shadow-xs: 0 1px 2px rgba(44, 36, 22, 0.06);
    --shadow-sm: 0 2px 6px rgba(44, 36, 22, 0.08);
    --shadow-md: 0 6px 18px rgba(44, 36, 22, 0.08);
    --shadow-lg: 0 12px 32px rgba(44, 36, 22, 0.10);
    --shadow-xl: 0 20px 48px rgba(44, 36, 22, 0.12);
    --shadow-glow: 0 0 0 1px var(--color-primary-muted), 0 8px 32px rgba(44, 36, 22, 0.08);
    --shadow-glow-sm: 0 0 0 1px var(--color-primary-muted), 0 2px 8px rgba(44, 36, 22, 0.06);
  }
}
[data-theme=light] {
  --color-bg: #F7F3ED;
  --color-bg-elevated: #FCF9F4;
  --color-bg-alt: #F0EBE2;
  --color-surface: #FFFCF5;
  --color-surface-hover: #F5F0E8;
  --color-surface-elevated: #FFFCF5;
  --color-surface-strong: #E8E0D4;
  --color-primary: #4A6B7B;
  --color-primary-hover: #3A5A6A;
  --color-primary-muted: rgba(74, 107, 123, 0.1);
  --color-primary-strong: rgba(74, 107, 123, 0.22);
  --color-primary-glow: rgba(74, 107, 123, 0.12);
  --color-success: #5B7F6A;
  --color-success-muted: rgba(91, 127, 106, 0.1);
  --color-success-glow: rgba(91, 127, 106, 0.12);
  --color-warning: #A67C52;
  --color-warning-muted: rgba(166, 124, 82, 0.1);
  --color-warning-glow: rgba(166, 124, 82, 0.12);
  --color-danger: #9A5C5C;
  --color-danger-muted: rgba(154, 92, 92, 0.1);
  --color-danger-glow: rgba(154, 92, 92, 0.12);
  --color-text-primary: #2C2416;
  --color-text-secondary: #5D5242;
  --color-text-muted: #8A7D6B;
  --color-text-inverse: #F7F3ED;
  --color-border: rgba(44, 36, 22, 0.1);
  --color-border-strong: rgba(44, 36, 22, 0.18);
  --color-border-focus: rgba(74, 107, 123, 0.4);
  --focus-ring: 0 0 0 2px #FFFCF5, 0 0 0 4px var(--color-primary);
  --color-bg-code: #F0EBE2;
  --color-bg-code-inline: rgba(74, 107, 123, 0.08);
  --color-text-code: #4A6B7B;
  --overlay-backdrop: rgba(44, 36, 22, 0.4);
  --overlay-backdrop-strong: rgba(44, 36, 22, 0.6);
  --shadow-xs: 0 1px 2px rgba(44, 36, 22, 0.06);
  --shadow-sm: 0 2px 6px rgba(44, 36, 22, 0.08);
  --shadow-md: 0 6px 18px rgba(44, 36, 22, 0.08);
  --shadow-lg: 0 12px 32px rgba(44, 36, 22, 0.10);
  --shadow-xl: 0 20px 48px rgba(44, 36, 22, 0.12);
  --shadow-glow: 0 0 0 1px var(--color-primary-muted), 0 8px 32px rgba(44, 36, 22, 0.08);
  --shadow-glow-sm: 0 0 0 1px var(--color-primary-muted), 0 2px 8px rgba(44, 36, 22, 0.06);
}

[data-theme=dark] {
  --color-bg: #1A1A1A;
  --color-bg-elevated: #222222;
  --color-bg-alt: #222222;
  --color-surface: #2A2A2A;
  --color-surface-hover: #333333;
  --color-surface-elevated: #2E2E2E;
  --color-surface-strong: #3A3A3A;
  --color-primary: #8BAABA;
  --color-primary-hover: #A0C0D0;
  --color-primary-muted: rgba(139, 170, 186, 0.14);
  --color-primary-strong: rgba(139, 170, 186, 0.28);
  --color-primary-glow: rgba(139, 170, 186, 0.2);
  --color-success: #8FAB98;
  --color-success-muted: rgba(143, 171, 152, 0.14);
  --color-success-glow: rgba(143, 171, 152, 0.2);
  --color-warning: #C49A78;
  --color-warning-muted: rgba(196, 154, 120, 0.14);
  --color-warning-glow: rgba(196, 154, 120, 0.2);
  --color-danger: #C48484;
  --color-danger-muted: rgba(196, 132, 132, 0.14);
  --color-danger-glow: rgba(196, 132, 132, 0.2);
  --color-text-primary: #E8E0D4;
  --color-text-secondary: #C4BAA8;
  --color-text-muted: #9A8E7A;
  --color-text-inverse: #1A1A1A;
  --color-border: rgba(232, 224, 212, 0.08);
  --color-border-strong: rgba(232, 224, 212, 0.14);
  --color-border-focus: rgba(139, 170, 186, 0.45);
  --focus-ring: 0 0 0 2px #1A1A1A, 0 0 0 4px var(--color-primary);
  --color-bg-code: #202020;
  --color-bg-code-inline: rgba(139, 170, 186, 0.1);
  --color-text-code: #8BAABA;
  --overlay-backdrop: rgba(26, 26, 26, 0.72);
  --overlay-backdrop-strong: rgba(26, 26, 26, 0.88);
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 6px 18px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 0 1px var(--color-primary-muted), 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow-sm: 0 0 0 1px var(--color-primary-muted), 0 2px 8px rgba(0, 0, 0, 0.28);
}

.observatory-tab:focus-visible, .btn:focus-visible, .form-input:focus-visible, .theme-toggle:focus-visible, .dropdown-item:focus-visible, .code-block .copy-btn:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

@font-face {
  font-family: "Geist";
  src: local("Geist"), local("Geist Variable"), url("https://cdn.jsdelivr.net/npm/geist@1/fonts/GeistVF.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: "Geist";
  src: local("Geist"), local("Geist Variable"), url("https://cdn.jsdelivr.net/npm/geist@1/fonts/GeistVF-Italic.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-display: swap;
  font-style: italic;
}
@font-face {
  font-family: "Geist Mono";
  src: local("Geist Mono"), local("Geist Mono Variable"), url("https://cdn.jsdelivr.net/npm/geist@1/fonts/GeistMonoVF.woff2") format("woff2-variations");
  font-weight: 100 900;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: "Literata";
  src: url("https://fonts.gstatic.com/s/literata/v35/eor3gP6rQJHDE50k6RQS.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
  font-style: normal;
}
@font-face {
  font-family: "Caveat";
  src: url("https://fonts.gstatic.com/s/caveat/v18/Wnz6HAc5bAfYB2Q7YjYY.woff2") format("woff2");
  font-weight: 400 700;
  font-display: swap;
  font-style: normal;
}
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  font-weight: var(--weight-normal);
  letter-spacing: var(--tracking-normal);
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-4);
}

h1 {
  font-size: var(--text-5xl);
  margin-bottom: var(--space-6);
}

h2 {
  font-size: var(--text-4xl);
  margin-top: var(--space-12);
  margin-bottom: var(--space-4);
}

h3 {
  font-size: var(--text-3xl);
  margin-top: var(--space-10);
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--text-2xl);
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
}

h5 {
  font-size: var(--text-xl);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

h6 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-secondary);
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
}

p {
  margin: 0 0 var(--space-5);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
}

p:last-child {
  margin-bottom: 0;
}

.lead {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  font-weight: var(--weight-normal);
  max-width: var(--container-normal);
}

.annotation {
  font-family: var(--font-hand);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-snug);
}

.margin-note {
  font-family: var(--font-hand);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-snug);
  border-left: 2px solid var(--color-primary-muted);
  padding-left: var(--space-3);
  margin: var(--space-4) 0;
}

.insight-label {
  font-family: var(--font-hand);
  font-size: var(--text-base);
  color: var(--color-primary);
  font-weight: var(--weight-medium);
}

blockquote {
  font-family: var(--font-hand);
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  border-left: 3px solid var(--color-primary);
  background: var(--color-primary-muted);
  padding: var(--space-5) var(--space-6);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  margin: var(--space-6) 0;
  font-style: italic;
}
blockquote p:last-child {
  margin-bottom: 0;
}
blockquote footer {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  font-style: normal;
  font-family: var(--font-sans);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
  text-underline-offset: 2px;
}
a:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
  text-decoration-color: var(--color-primary-muted);
}
a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

code, kbd, samp, pre {
  font-family: var(--font-mono);
  font-size: 0.9em;
}

code:not(pre > code) {
  background: var(--color-bg-code-inline);
  color: var(--color-text-code);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-weight: var(--weight-medium);
}

pre {
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5) var(--space-6);
  overflow-x: auto;
  line-height: 1.7;
  font-size: var(--text-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
pre::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
pre::-webkit-scrollbar-track {
  background: transparent;
}
pre::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
pre::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}
pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  font-size: inherit;
  font-weight: var(--weight-normal);
}

kbd {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  box-shadow: var(--shadow-xs);
}

ul, ol {
  margin: 0 0 var(--space-5);
  padding-left: var(--space-6);
  line-height: var(--leading-relaxed);
}
ul li, ol li {
  margin-bottom: var(--space-2);
}
ul li:last-child, ol li:last-child {
  margin-bottom: 0;
}

ul {
  list-style: disc;
}

ol {
  list-style: decimal;
}

ul.contains-task-list {
  list-style: none;
  padding-left: 0;
}

input[type=checkbox] {
  margin-right: var(--space-3);
  accent-color: var(--color-primary);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
  overflow-x: auto;
  display: block;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
table::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
table::-webkit-scrollbar-track {
  background: transparent;
}
table::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
table::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}
table th, table td {
  padding: var(--space-3) var(--space-4);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}
table th {
  font-weight: var(--weight-semibold);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
}
table tr:hover td {
  background: var(--color-surface-hover);
}
table tr:last-child td {
  border-bottom: none;
}

hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: var(--space-10) 0;
}

img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

figure {
  margin: var(--space-8) 0;
  text-align: center;
}
figure img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}
figure figcaption {
  margin-top: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: italic;
}

.img-zoomable {
  cursor: zoom-in;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.img-zoomable:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-lg);
}

.text-primary {
  color: var(--color-text-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-muted {
  color: var(--color-text-muted);
}

.text-inverse {
  color: var(--color-text-inverse);
}

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.font-mono {
  font-family: var(--font-mono);
}

.font-sans {
  font-family: var(--font-sans);
}

.font-normal {
  font-weight: var(--weight-normal);
}

.font-medium {
  font-weight: var(--weight-medium);
}

.font-semibold {
  font-weight: var(--weight-semibold);
}

.font-bold {
  font-weight: var(--weight-bold);
}

.uppercase {
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.lowercase {
  text-transform: lowercase;
}

.capitalize {
  text-transform: capitalize;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 767px) {
  html {
    font-size: 15px;
  }
  h1 {
    font-size: var(--text-3xl);
    font-weight: var(--weight-semibold);
  }
  h2 {
    font-size: var(--text-2xl);
  }
  h3 {
    font-size: var(--text-xl);
  }
  h4 {
    font-size: var(--text-lg);
  }
  .lead {
    font-size: var(--text-base);
  }
  p {
    line-height: 1.8;
  }
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  font-weight: var(--weight-normal);
  letter-spacing: var(--tracking-normal);
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  width: 100%;
}

.main-content {
  flex: 1;
  width: 100%;
  padding-top: var(--space-6);
  padding-bottom: var(--space-16);
}

@media (min-width: 768px) {
  .main-content {
    padding-top: var(--space-10);
    padding-bottom: var(--space-24);
  }
}
.container {
  width: 100%;
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

@media (min-width: 480px) {
  .container {
    padding: 0 var(--space-6);
  }
}
@media (min-width: 1024px) {
  .container {
    padding: 0 var(--space-8);
  }
}
.container-narrow {
  max-width: var(--container-normal);
}

.container-full {
  max-width: var(--container-full);
  padding: 0;
}

.grid {
  display: grid;
  gap: var(--space-6);
}

.grid-cols-1 {
  grid-template-columns: 1fr;
}

.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 767px) {
  .grid-cols-2, .grid-cols-3, .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}
@media (min-width: 768px) {
  .md\:grid-cols-2 {
    grid-template-columns: repeat(2, 1fr);
  }
  .md\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (min-width: 1024px) {
  .lg\:grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .lg\:grid-cols-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.flex-wrap {
  flex-wrap: wrap;
}

.items-center {
  align-items: center;
}

.items-start {
  align-items: flex-start;
}

.items-end {
  align-items: flex-end;
}

.justify-center {
  justify-content: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-start {
  justify-content: flex-start;
}

.justify-end {
  justify-content: flex-end;
}

.gap-1 {
  gap: var(--space-1);
}

.gap-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

.gap-4 {
  gap: var(--space-4);
}

.gap-5 {
  gap: var(--space-5);
}

.gap-6 {
  gap: var(--space-6);
}

.gap-8 {
  gap: var(--space-8);
}

.flex-1 {
  flex: 1 1 0%;
}

.flex-auto {
  flex: 1 1 auto;
}

.flex-initial {
  flex: 0 1 auto;
}

.flex-none {
  flex: none;
}

.mt-0 {
  margin-top: 0;
}

.mt-1 {
  margin-top: var(--space-1);
}

.mt-2 {
  margin-top: var(--space-2);
}

.mt-3 {
  margin-top: var(--space-3);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-5 {
  margin-top: var(--space-5);
}

.mt-6 {
  margin-top: var(--space-6);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mt-10 {
  margin-top: var(--space-10);
}

.mt-12 {
  margin-top: var(--space-12);
}

.mt-16 {
  margin-top: var(--space-16);
}

.mt-auto {
  margin-top: auto;
}

.mb-0 {
  margin-bottom: 0;
}

.mb-1 {
  margin-bottom: var(--space-1);
}

.mb-2 {
  margin-bottom: var(--space-2);
}

.mb-3 {
  margin-bottom: var(--space-3);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-5 {
  margin-bottom: var(--space-5);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.mb-10 {
  margin-bottom: var(--space-10);
}

.mb-12 {
  margin-bottom: var(--space-12);
}

.mb-16 {
  margin-bottom: var(--space-16);
}

.mb-auto {
  margin-bottom: auto;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.my-6 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-6);
}

.my-8 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-8);
}

.my-12 {
  margin-top: var(--space-12);
  margin-bottom: var(--space-12);
}

.my-16 {
  margin-top: var(--space-16);
  margin-bottom: var(--space-16);
}

.p-4 {
  padding: var(--space-4);
}

.p-5 {
  padding: var(--space-5);
}

.p-6 {
  padding: var(--space-6);
}

.p-8 {
  padding: var(--space-8);
}

.px-4 {
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.px-6 {
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

.py-4 {
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.py-6 {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

.py-12 {
  padding-top: var(--space-12);
  padding-bottom: var(--space-12);
}

.section {
  padding: var(--space-12) 0;
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-16) 0;
  }
}
.section-header {
  text-align: center;
  max-width: var(--container-narrow);
  margin: 0 auto var(--space-12);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

@media (min-width: 768px) {
  .section-title {
    font-size: var(--text-4xl);
  }
}
.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-weight: var(--weight-normal);
  line-height: var(--leading-relaxed);
}

.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: var(--space-8) 0;
}

.divider-strong {
  background: var(--color-border-strong);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  line-height: 1;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
}
.btn.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
}
.btn.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-base);
}
.btn.btn-icon {
  padding: var(--space-2);
  gap: 0;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-sm);
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}
.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover:not(:disabled) {
  background: var(--color-primary-muted);
  color: var(--color-primary-hover);
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-text-inverse);
  border-color: var(--color-danger);
}
.btn-danger:hover:not(:disabled) {
  background: #DC2626;
  box-shadow: 0 0 0 1px var(--color-danger-muted), 0 4px 16px rgba(239, 68, 68, 0.3);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
  line-height: 1;
}

.badge-primary {
  background: var(--color-primary-muted);
  color: var(--color-primary);
}

.badge-success {
  background: var(--color-success-muted);
  color: var(--color-success);
}

.badge-warning {
  background: var(--color-warning-muted);
  color: var(--color-warning);
}

.badge-danger {
  background: var(--color-danger-muted);
  color: var(--color-danger);
}

.badge-neutral {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.badge-outline {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.badge-dot::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

.card, .decision-flow-card, .knowledge-graph-card, .metric-card, .article-card, .feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: all var(--transition-base);
  box-shadow: var(--shadow-sm);
}
.card:hover, .decision-flow-card:hover, .knowledge-graph-card:hover, .metric-card:hover, .article-card:hover, .feature-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-elevated, .project-card {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-strong);
}
.card-elevated:hover, .project-card:hover {
  box-shadow: var(--shadow-lg);
}

.card-glass {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--color-border);
}

.card-interactive {
  cursor: pointer;
}
.card-interactive:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
}

.feature-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  opacity: 0;
  transition: opacity var(--transition-base);
}
.feature-card:hover::before {
  opacity: 1;
}

.feature-card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  background: var(--color-primary-muted);
  color: var(--color-primary);
  flex-shrink: 0;
}
.feature-card-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card-icon.success {
  background: var(--color-success-muted);
  color: var(--color-success);
}

.feature-card-icon.warning {
  background: var(--color-warning-muted);
  color: var(--color-warning);
}

.feature-card-icon.danger {
  background: var(--color-danger-muted);
  color: var(--color-danger);
}

.feature-card-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.feature-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin: 0;
  flex: 1;
}

.feature-card-footer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.article-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  text-decoration: none;
  color: inherit;
}
.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow);
  border-color: var(--color-primary);
  text-decoration: none;
  color: inherit;
}

.article-card-image {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  margin: calc(-1 * var(--space-6)) calc(-1 * var(--space-6)) var(--space-5);
  transition: transform var(--transition-slow);
  background: var(--color-bg-code);
}
.article-card:hover .article-card-image {
  transform: scale(1.03);
}

.article-card-meta {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.article-card-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  line-height: var(--leading-snug);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
  transition: color var(--transition-fast);
}
.article-card:hover .article-card-title {
  color: var(--color-primary);
}

.article-card-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
}

.project-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: var(--space-6);
  position: relative;
  overflow: hidden;
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-4);
}

.project-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-muted);
  color: var(--color-primary);
  flex-shrink: 0;
}
.project-card-icon svg {
  width: 24px;
  height: 24px;
}

.project-card-title {
  font-size: var(--text-xl);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
  flex: 1;
}

.project-card-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  margin: 0 0 var(--space-5);
  flex: 1;
}

.project-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.project-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.metric-card {
  padding: var(--space-5);
  text-align: center;
}

.metric-card-value {
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-text-primary);
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-1);
}

.metric-card-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.metric-card-trend {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  margin-top: var(--space-3);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}

.metric-card-trend.up {
  background: var(--color-success-muted);
  color: var(--color-success);
}

.metric-card-trend.down {
  background: var(--color-danger-muted);
  color: var(--color-danger);
}

.metric-card-trend.neutral {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.alert {
  display: flex;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-radius: var(--radius-lg);
  border: 1px solid transparent;
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
}

.alert-icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.alert-content {
  flex: 1;
  min-width: 0;
}

.alert-title {
  font-weight: var(--weight-semibold);
  margin-bottom: var(--space-1);
}

.alert-message {
  margin: 0;
  color: var(--color-text-secondary);
}

.alert-info {
  background: var(--color-primary-muted);
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.alert-info .alert-icon {
  color: var(--color-primary);
}

.alert-success {
  background: var(--color-success-muted);
  border-color: var(--color-success);
  color: var(--color-success);
}
.alert-success .alert-icon {
  color: var(--color-success);
}

.alert-warning {
  background: var(--color-warning-muted);
  border-color: var(--color-warning);
  color: var(--color-warning);
}
.alert-warning .alert-icon {
  color: var(--color-warning);
}

.alert-danger {
  background: var(--color-danger-muted);
  border-color: var(--color-danger);
  color: var(--color-danger);
}
.alert-danger .alert-icon {
  color: var(--color-danger);
}

.form-input {
  width: 100%;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  transition: all var(--transition-fast);
}
.form-input::placeholder {
  color: var(--color-text-muted);
}
.form-input:hover:not(:disabled):not(:focus) {
  border-color: var(--color-border-strong);
}
.form-input:focus {
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-primary-muted);
  background: var(--color-bg-elevated);
}

.search-input {
  position: relative;
  max-width: 480px;
  width: 100%;
}
.search-input .search-icon {
  position: absolute;
  left: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  pointer-events: none;
  width: 20px;
  height: 20px;
}
.search-input .form-input {
  padding-left: var(--space-10);
}
.search-input .search-clear {
  position: absolute;
  right: var(--space-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-1);
  display: none;
}
.search-input .search-clear:hover {
  color: var(--color-text-primary);
}
.search-input.has-value .search-clear {
  display: block;
}

.theme-toggle {
  position: relative;
  width: 48px;
  height: 28px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-base);
}
.theme-toggle::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-spring);
}
.theme-toggle[data-theme=light]::before {
  transform: translateX(20px);
}
.theme-toggle[data-theme=light] {
  background: var(--color-warning);
}

.dropdown {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + var(--space-2));
  right: 0;
  min-width: 200px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition-fast);
  z-index: var(--z-dropdown);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.dropdown-menu::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.dropdown-menu::-webkit-scrollbar-track {
  background: transparent;
}
.dropdown-menu::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.dropdown-menu::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}
.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition-fast);
}
.dropdown-item:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}
.tooltip {
  position: relative;
  cursor: help;
}
.tooltip::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + var(--space-2));
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  padding: var(--space-2) var(--space-3);
  background: var(--color-surface-strong);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-primary);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: all var(--transition-fast);
  z-index: var(--z-tooltip);
  box-shadow: var(--shadow-md);
}
.tooltip:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.tabs {
  display: flex;
  gap: var(--space-1);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-6);
}

.tab-btn {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.tab-btn:hover {
  color: var(--color-text-primary);
}
.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-nav);
  background: color-mix(in srgb, var(--color-bg) 86%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition-base);
}
.navbar.scrolled {
  background: color-mix(in srgb, var(--color-bg) 96%, transparent);
  box-shadow: var(--shadow-sm);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 var(--space-5);
  max-width: var(--container-wide);
  margin: 0 auto;
}

@media (min-width: 768px) {
  .navbar-inner {
    padding: 0 var(--space-8);
  }
}
.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  text-decoration: none;
  flex-shrink: 0;
}
.navbar-brand:hover {
  color: var(--color-text-primary);
  text-decoration: none;
}
.navbar-brand .logo-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: var(--weight-bold);
  font-size: var(--text-sm);
}

.navbar-menu {
  display: none;
  align-items: center;
  gap: var(--space-1);
  list-style: none;
  margin: 0;
  padding: 0;
}
@media (min-width: 768px) {
  .navbar-menu {
    display: flex;
  }
}

.navbar-item {
  position: relative;
}

.navbar-link {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}
.navbar-link:hover {
  color: var(--color-text-primary);
  background: var(--color-surface);
}
.navbar-link.active {
  color: var(--color-primary);
  background: var(--color-primary-muted);
}

.navbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.navbar-search {
  display: none;
}
@media (min-width: 1024px) {
  .navbar-search {
    display: block;
  }
}

.navbar-mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  color: var(--color-text-secondary);
  border-radius: var(--radius-md);
  cursor: pointer;
}
@media (min-width: 768px) {
  .navbar-mobile-toggle {
    display: none;
  }
}
.navbar-mobile-toggle:hover {
  background: var(--color-surface);
  color: var(--color-text-primary);
}

.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-5);
  display: none;
  flex-direction: column;
  gap: var(--space-2);
  z-index: calc(var(--z-nav) - 1);
  box-shadow: var(--shadow-lg);
}
.mobile-menu.open {
  display: flex;
}
.mobile-menu .navbar-link {
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
}

.footer-compact {
  padding: var(--space-10) var(--space-5) var(--space-6);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.footer-compact-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.footer-brand p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-relaxed);
  margin-top: var(--space-3);
  max-width: 34rem;
}

.footer-col h4 {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
  font-weight: var(--weight-semibold);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-links a {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
  text-decoration: none;
}
.footer-links a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.footer-bottom {
  max-width: var(--container-wide);
  margin: var(--space-8) auto 0;
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
  text-align: left;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (min-width: 768px) {
  .footer-compact {
    padding: var(--space-12) var(--space-8) var(--space-8);
  }
  .footer-compact-inner {
    grid-template-columns: 2fr repeat(4, 1fr);
  }
}
.hero {
  position: relative;
  padding: var(--space-16) 0 var(--space-12);
  overflow: hidden;
}

.hero-observatory {
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(180deg, color-mix(in srgb, var(--color-primary) 7%, transparent), transparent 58%), var(--color-bg);
}

.hero-inner {
  max-width: var(--container-normal);
  margin: 0 auto;
  padding: 0 var(--space-5);
  text-align: left;
  position: relative;
  z-index: 1;
}

.hero-kicker,
.section-kicker {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  letter-spacing: var(--tracking-wide);
  margin: 0 0 var(--space-4);
  text-transform: uppercase;
}

.hero-title {
  font-size: clamp(2.35rem, 2.05rem + 1.5vw, 4.15rem);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: 0;
  color: var(--color-text-primary);
  margin-bottom: var(--space-5);
  max-width: 12ch;
}

.hero-tagline {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 42rem;
  margin: 0 0 var(--space-6);
  line-height: var(--leading-relaxed);
}

.hero-context {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}
.hero-context span {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-3);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.hero-actions .btn {
  width: 100%;
}

@media (min-width: 480px) {
  .hero-actions {
    flex-direction: row;
  }
  .hero-actions .btn {
    width: auto;
  }
}
@media (min-width: 768px) {
  .hero {
    padding: var(--space-24) 0 var(--space-20);
  }
  .hero-inner {
    padding: 0 var(--space-8);
  }
}
.section {
  padding: var(--space-12) 0;
}

.section-compact {
  padding-top: var(--space-8);
}

.section-observatory {
  background: var(--color-bg-alt);
}

.section-header {
  text-align: left;
  max-width: var(--container-narrow);
  margin: 0 0 var(--space-8);
}

.section-header-left {
  margin-left: 0;
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  letter-spacing: 0;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  font-weight: var(--weight-normal);
  line-height: var(--leading-relaxed);
}

.editorial-grid {
  display: grid;
  gap: var(--space-8);
}

.observation-list,
.workbench-list,
.note-list {
  display: grid;
  gap: var(--space-3);
}

.observation-item,
.note-row,
.workbench-item {
  border-top: 1px solid var(--color-border);
  color: inherit;
  display: grid;
  gap: var(--space-3);
  padding: var(--space-5) 0;
  text-decoration: none;
}

.note-row {
  grid-template-columns: 2rem 1fr;
}

.note-row time {
  display: none;
}

.observation-item:hover,
.note-row:hover {
  color: inherit;
  text-decoration: none;
}
.observation-item:hover strong,
.note-row:hover strong {
  color: var(--color-primary);
}

.observation-mark,
.note-row time,
.workbench-item span,
.note-row-topic {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.observation-item strong,
.note-row strong,
.workbench-item strong {
  color: var(--color-text-primary);
  display: block;
  font-size: var(--text-lg);
  line-height: var(--leading-snug);
  margin-bottom: var(--space-1);
  transition: color var(--transition-fast);
}

.observation-item em,
.note-row em,
.workbench-item em {
  color: var(--color-text-muted);
  display: block;
  font-style: normal;
  line-height: var(--leading-relaxed);
}

.section-action {
  margin-top: var(--space-8);
}

@media (min-width: 768px) {
  .section {
    padding: var(--space-16) 0;
  }
  .section-title {
    font-size: var(--text-4xl);
  }
  .section-subtitle {
    font-size: var(--text-lg);
  }
  .editorial-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: var(--space-12);
  }
  .observation-item {
    grid-template-columns: 3rem 1fr;
  }
  .note-row {
    grid-template-columns: 3rem 8rem minmax(0, 1fr) 8rem;
    align-items: baseline;
  }
  .note-row time {
    display: block;
  }
  .workbench-item {
    grid-template-columns: 6rem minmax(0, 1fr);
  }
}
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: var(--space-8) 0;
}

.divider-strong {
  background: var(--color-border-strong);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}
@keyframes slideInDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}
@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}
.animate-fade-in {
  animation: fadeIn var(--transition-base) ease-out;
}

.animate-fade-in-up {
  animation: fadeInUp var(--transition-slow) var(--transition-spring) forwards;
}

.animate-slide-down {
  animation: slideInDown var(--transition-base) ease-out;
}

.animate-pulse {
  animation: pulse 2s ease-in-out infinite;
}

.animate-spin {
  animation: spin 1s linear infinite;
}

.stagger-1 {
  animation-delay: 0.1s;
}

.stagger-2 {
  animation-delay: 0.2s;
}

.stagger-3 {
  animation-delay: 0.3s;
}

.stagger-4 {
  animation-delay: 0.4s;
}

.stagger-5 {
  animation-delay: 0.5s;
}

.stagger-6 {
  animation-delay: 0.6s;
}

.article-header {
  max-width: var(--container-normal);
  margin: 0 auto var(--space-8);
  padding: 0 var(--space-4);
  text-align: center;
}
@media (min-width: 768px) {
  .article-header {
    padding: 0 var(--space-5);
    margin-bottom: var(--space-10);
  }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
@media (min-width: 768px) {
  .article-meta {
    gap: var(--space-3);
    font-size: var(--text-sm);
  }
}

.article-title {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}
@media (min-width: 768px) {
  .article-title {
    font-size: var(--text-4xl);
  }
}
@media (min-width: 1024px) {
  .article-title {
    font-size: var(--text-5xl);
  }
}

.article-lead {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto var(--space-4);
  text-align: center;
}
@media (min-width: 768px) {
  .article-lead {
    font-size: var(--text-lg);
  }
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-2);
}

.article-feature-image-wrapper {
  max-width: var(--container-normal);
  margin: 0 auto var(--space-8);
  padding: 0 var(--space-4);
}
@media (min-width: 768px) {
  .article-feature-image-wrapper {
    padding: 0 var(--space-5);
  }
}

.article-feature-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.article-content {
  padding: 0 var(--space-5);
}
@media (min-width: 768px) {
  .article-content {
    padding: 0 var(--space-5);
  }
}

.article-layout {
  display: block;
  max-width: var(--container-normal);
  margin: 0 auto;
}
@media (min-width: 1024px) {
  .article-layout {
    display: grid;
    grid-template-columns: 1fr 220px;
    gap: var(--space-10);
    max-width: 1100px;
    align-items: start;
  }
}

.article-body {
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  min-width: 0;
}

.article-body > * + * {
  margin-top: var(--space-5);
}

.article-body p a,
.article-body li a {
  text-decoration: underline;
  text-decoration-color: var(--color-primary-muted);
  text-underline-offset: 3px;
}

.article-body h2 {
  margin-top: var(--space-10);
}

.article-body h3 {
  margin-top: var(--space-8);
}

@media (max-width: 767px) {
  .article-body > * + * {
    margin-top: var(--space-6);
  }
}
.article-toc-wrapper {
  display: none;
}
@media (min-width: 1024px) {
  .article-toc-wrapper {
    display: block;
    order: 2;
  }
}

.article-footer {
  max-width: var(--container-normal);
  margin: var(--space-12) auto 0;
  padding: var(--space-6) var(--space-4);
  border-top: 1px solid var(--color-border);
}
@media (min-width: 768px) {
  .article-footer {
    margin-top: var(--space-16);
    padding: var(--space-8) var(--space-5);
  }
}

.article-footer-nav {
  display: flex;
  justify-content: space-between;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.article-footer-link {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
  flex: 1;
  min-width: 0;
}
.article-footer-link span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.article-footer-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-muted);
}

.toc {
  position: sticky;
  top: 100px;
  max-height: calc(100vh - 140px);
  overflow-y: auto;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--text-sm);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.toc::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.toc::-webkit-scrollbar-track {
  background: transparent;
}
.toc::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.toc::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}

.toc-title {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.toc-item {
  margin-bottom: var(--space-2);
}

.toc-item.toc-h3 {
  padding-left: var(--space-4);
  font-size: var(--text-xs);
}

.toc-link {
  display: block;
  padding: var(--space-1) 0;
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
  border-left: 2px solid transparent;
  padding-left: var(--space-3);
  margin-left: calc(-1 * var(--space-3));
}
.toc-link:hover {
  color: var(--color-primary);
  border-left-color: var(--color-primary);
}
.toc-link.active {
  color: var(--color-primary);
  font-weight: var(--weight-medium);
  border-left-color: var(--color-primary);
}

.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transform-origin: 0% 50%;
  transform: scaleX(0);
  z-index: var(--z-fixed);
  box-shadow: var(--shadow-glow-primary);
}

.highlight {
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: auto;
  margin: var(--space-6) calc(-1 * var(--space-5));
  padding: var(--space-5) var(--space-6);
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.highlight::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.highlight::-webkit-scrollbar-track {
  background: transparent;
}
.highlight::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.highlight::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}
@media (min-width: 768px) {
  .highlight {
    margin: var(--space-6) 0;
    border-radius: var(--radius-lg);
  }
}

.highlight pre {
  background: transparent;
  border: none;
  padding: 0;
  margin: 0;
  overflow: visible;
}

.highlight code {
  background: transparent;
  padding: 0;
  font-size: var(--text-sm);
  line-height: 1.7;
}

.highlight .hll {
  background: rgba(79, 140, 255, 0.08);
}

.highlight .linenos {
  color: var(--color-text-muted);
  padding-right: var(--space-4);
  user-select: none;
}

.highlight .lineno {
  display: inline-block;
  width: 40px;
  text-align: right;
}

/* Token colors */
.highlight .c {
  color: var(--color-text-muted);
  font-style: italic;
} /* Comment */
.highlight .err {
  color: var(--color-danger);
} /* Error */
.highlight .k {
  color: #C586C0;
} /* Keyword */
.highlight .l {
  color: #B5CEA8;
} /* Literal */
.highlight .n {
  color: #D4D4D4;
} /* Name */
.highlight .o {
  color: #D4D4D4;
} /* Operator */
.highlight .p {
  color: #D4D4D4;
} /* Punctuation */
.highlight .cm {
  color: var(--color-text-muted);
  font-style: italic;
} /* Comment.Multiline */
.highlight .cp {
  color: #9CDCFE;
} /* Comment.Preproc */
.highlight .c1 {
  color: var(--color-text-muted);
  font-style: italic;
} /* Comment.Single */
.highlight .cs {
  color: var(--color-text-muted);
  font-style: italic;
} /* Comment.Special */
.highlight .gd {
  color: var(--color-danger);
} /* Generic.Deleted */
.highlight .ge {
  font-style: italic;
} /* Generic.Emph */
.highlight .gr {
  color: var(--color-danger);
} /* Generic.Error */
.highlight .gh {
  color: var(--color-text-muted);
  font-weight: bold;
} /* Generic.Heading */
.highlight .gi {
  color: var(--color-success);
} /* Generic.Inserted */
.highlight .go {
  color: var(--color-text-muted);
} /* Generic.Output */
.highlight .gp {
  color: var(--color-text-muted);
} /* Generic.Prompt */
.highlight .gs {
  font-weight: bold;
} /* Generic.Strong */
.highlight .gu {
  color: var(--color-warning);
  font-weight: bold;
} /* Generic.Subheading */
.highlight .gt {
  color: var(--color-danger);
} /* Generic.Traceback */
.highlight .kc {
  color: #C586C0;
} /* Keyword.Constant */
.highlight .kd {
  color: #C586C0;
} /* Keyword.Declaration */
.highlight .kn {
  color: #C586C0;
} /* Keyword.Namespace */
.highlight .kp {
  color: #C586C0;
} /* Keyword.Pseudo */
.highlight .kr {
  color: #C586C0;
} /* Keyword.Reserved */
.highlight .kt {
  color: #4EC9B0;
} /* Keyword.Type */
.highlight .ld {
  color: #D4D4D4;
} /* Literal.Date */
.highlight .m {
  color: #B5CEA8;
} /* Literal.Number */
.highlight .s {
  color: #CE9178;
} /* Literal.String */
.highlight .na {
  color: #9CDCFE;
} /* Name.Attribute */
.highlight .nb {
  color: #9CDCFE;
} /* Name.Builtin */
.highlight .nc {
  color: #4EC9B0;
} /* Name.Class */
.highlight .no {
  color: #DCDCAA;
} /* Name.Constant */
.highlight .nd {
  color: #DCDCAA;
} /* Name.Decorator */
.highlight .ni {
  color: #DCDCAA;
} /* Name.Entity */
.highlight .ne {
  color: #DCDCAA;
} /* Name.Exception */
.highlight .nf {
  color: #DCDCAA;
} /* Name.Function */
.highlight .nl {
  color: #DCDCAA;
} /* Name.Label */
.highlight .nn {
  color: #DCDCAA;
} /* Name.Namespace */
.highlight .nx {
  color: #DCDCAA;
} /* Name.Other */
.highlight .py {
  color: #9CDCFE;
} /* Name.Property */
.highlight .nt {
  color: #569CD6;
} /* Name.Tag */
.highlight .nv {
  color: #9CDCFE;
} /* Name.Variable */
.highlight .ow {
  color: #D4D4D4;
} /* Operator.Word */
.highlight .w {
  color: #D4D4D4;
} /* Text.Whitespace */
.highlight .mb {
  color: #B5CEA8;
} /* Literal.Number.Bin */
.highlight .mf {
  color: #B5CEA8;
} /* Literal.Number.Float */
.highlight .mh {
  color: #B5CEA8;
} /* Literal.Number.Hex */
.highlight .mi {
  color: #B5CEA8;
} /* Literal.Number.Integer */
.highlight .mo {
  color: #B5CEA8;
} /* Literal.Number.Oct */
.highlight .sa {
  color: #CE9178;
} /* Literal.String.Affix */
.highlight .sb {
  color: #CE9178;
} /* Literal.String.Backtick */
.highlight .sc {
  color: #CE9178;
} /* Literal.String.Char */
.highlight .dl {
  color: #CE9178;
} /* Literal.String.Delimiter */
.highlight .sd {
  color: #CE9178;
  font-style: italic;
} /* Literal.String.Doc */
.highlight .s2 {
  color: #CE9178;
} /* Literal.String.Double */
.highlight .se {
  color: #CE9178;
} /* Literal.String.Escape */
.highlight .sh {
  color: #CE9178;
} /* Literal.String.Heredoc */
.highlight .si {
  color: #CE9178;
} /* Literal.String.Interpol */
.highlight .sx {
  color: #CE9178;
} /* Literal.String.Other */
.highlight .sr {
  color: #CE9178;
} /* Literal.String.Regex */
.highlight .s1 {
  color: #CE9178;
} /* Literal.String.Single */
.highlight .ss {
  color: #CE9178;
} /* Literal.String.Symbol */
.highlight .bp {
  color: #9CDCFE;
} /* Name.Builtin.Pseudo */
.highlight .vc {
  color: #9CDCFE;
} /* Name.Variable.Class */
.highlight .vg {
  color: #9CDCFE;
} /* Name.Variable.Global */
.highlight .vi {
  color: #9CDCFE;
} /* Name.Variable.Instance */
.highlight .il {
  color: #B5CEA8;
} /* Literal.Number.Integer.Long */
.katex {
  font-size: 1em !important;
}

.katex-display {
  overflow-x: auto;
  overflow-y: hidden;
  margin: var(--space-6) 0;
}

.mermaid {
  background: var(--color-bg-code);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  margin: var(--space-8) 0;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.mermaid::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.mermaid::-webkit-scrollbar-track {
  background: transparent;
}
.mermaid::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.mermaid::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}

details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  margin: var(--space-6) 0;
}

summary {
  padding: var(--space-4) var(--space-5);
  font-weight: var(--weight-medium);
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  transition: background var(--transition-fast);
}
summary::-webkit-details-marker {
  display: none;
}
summary::after {
  content: "";
  width: 16px;
  height: 16px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E") center/contain no-repeat;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}
summary:hover {
  background: var(--color-surface-hover);
}

details[open] summary::after {
  transform: rotate(180deg);
}

details[open] summary {
  border-bottom: 1px solid var(--color-border);
}

details > *:not(summary) {
  padding: var(--space-5);
}

.image-zoom-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-backdrop-strong);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  padding: var(--space-4);
}
.image-zoom-overlay.open {
  opacity: 1;
  visibility: visible;
}
.image-zoom-overlay img {
  max-width: 100%;
  max-height: 90vh;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  transform: scale(0.9);
  transition: transform var(--transition-spring);
}
.image-zoom-overlay.open img {
  transform: scale(1);
}

.image-zoom-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.image-zoom-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.code-block {
  position: relative;
}
.code-block .copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  opacity: 0;
  transition: all var(--transition-fast);
}
.code-block .copy-btn:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}
.code-block:hover .copy-btn {
  opacity: 1;
}
.code-block .copy-btn.copied {
  background: var(--color-success-muted);
  color: var(--color-success);
  border-color: var(--color-success);
}

.search-overlay {
  position: fixed;
  inset: 0;
  background: var(--overlay-backdrop);
  backdrop-filter: blur(8px);
  z-index: var(--z-modal);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 120px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}
.search-overlay.open {
  opacity: 1;
  visibility: visible;
}

.search-panel {
  width: 100%;
  max-width: 720px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transform: translateY(-20px);
  transition: transform var(--transition-spring);
}
.search-overlay.open .search-panel {
  transform: translateY(0);
}

.search-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
}

.search-input-wrapper {
  flex: 1;
  position: relative;
}

.search-input-wrapper .form-input {
  width: 100%;
  font-size: var(--text-lg);
  padding: var(--space-3) var(--space-4) var(--space-3) var(--space-10);
}

.search-input-wrapper .search-icon {
  left: var(--space-4);
  width: 24px;
  height: 24px;
}

.search-close {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: none;
  border: none;
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}
.search-close:hover {
  background: var(--color-surface-hover);
  color: var(--color-text-primary);
}

.search-results {
  max-height: 50vh;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.search-results::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.search-results::-webkit-scrollbar-track {
  background: transparent;
}
.search-results::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.search-results::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}

.search-result-item {
  display: block;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  text-decoration: none;
  color: inherit;
  transition: background var(--transition-fast);
}
.search-result-item:hover {
  background: var(--color-surface-hover);
}
.search-result-item:last-child {
  border-bottom: none;
}

.search-result-title {
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
}

.search-result-excerpt {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.search-result-meta {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.search-empty {
  padding: var(--space-10);
  text-align: center;
  color: var(--color-text-muted);
}

.knowledge-graph-card {
  padding: var(--space-6);
}

.knowledge-graph-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-5);
}

.knowledge-graph-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.knowledge-graph-canvas {
  width: 100%;
  height: 240px;
  border-radius: var(--radius-md);
  background: var(--color-bg-code);
}

.decision-flow-step {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-4) 0;
  position: relative;
}
.decision-flow-step:not(:last-child)::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 32px;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--color-primary), transparent);
}

.decision-flow-icon {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: var(--color-primary-muted);
  color: var(--color-primary);
  z-index: 1;
}

.decision-flow-content {
  flex: 1;
}

.decision-flow-title {
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-1);
}

.decision-flow-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.series-badge {
  max-width: var(--container-normal);
  margin: 0 auto var(--space-8);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-lg);
}
@media (min-width: 768px) {
  .series-badge {
    padding: var(--space-5) var(--space-6);
  }
}

.series-badge-header {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.series-badge-label {
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-primary);
}

.series-badge-position {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
}

.series-badge-nav {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.series-nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-fast);
}
.series-nav-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-muted);
  text-decoration: none;
}

.cross-series {
  max-width: var(--container-normal);
  margin: var(--space-10) auto;
  padding: 0 var(--space-4);
}
@media (min-width: 768px) {
  .cross-series {
    padding: 0 var(--space-5);
  }
}

.cross-series-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  margin-top: var(--space-4);
}
@media (min-width: 480px) {
  .cross-series-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (min-width: 768px) {
  .cross-series-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

.cross-series-card {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-fast);
}
.cross-series-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.cross-series-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  text-transform: capitalize;
  color: var(--color-primary);
  margin: 0 0 var(--space-3);
}

.cross-series-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.cross-series-list li {
  margin-bottom: var(--space-2);
  font-size: var(--text-sm);
  line-height: var(--leading-snug);
}
.cross-series-list li a {
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.cross-series-list li a:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.quote-block {
  position: relative;
  padding: var(--space-8) var(--space-6);
  background: linear-gradient(135deg, var(--color-primary-muted) 0%, var(--color-surface) 100%);
  border: 1px solid var(--color-primary-muted);
  border-radius: var(--radius-xl);
  margin: var(--space-8) 0;
  overflow: hidden;
}
.quote-block::before {
  content: '"';
  position: absolute;
  top: var(--space-4);
  left: var(--space-6);
  font-size: 8rem;
  font-family: Georgia, serif;
  color: var(--color-primary);
  opacity: 0.15;
  line-height: 1;
  font-weight: bold;
}

.quote-content {
  position: relative;
  z-index: 1;
  font-size: var(--text-xl);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  font-style: italic;
  margin: 0;
}

.quote-author {
  margin-top: var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  font-style: normal;
  font-weight: var(--weight-medium);
}

.timeline {
  position: relative;
  padding-left: var(--space-6);
}

.timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--space-8);
  padding-left: var(--space-6);
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: -19px;
  top: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
  z-index: 1;
}

.timeline-date {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  font-weight: var(--weight-medium);
  margin-bottom: var(--space-1);
}

.timeline-title {
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-1);
}

.timeline-desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin: 0;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.tag-cloud-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  transition: all var(--transition-fast);
}
.tag-cloud-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-muted);
  text-decoration: none;
}

.tag-cloud-count {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  background: var(--color-bg);
  padding: 0 var(--space-2);
  border-radius: var(--radius-full);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  margin-top: var(--space-12);
}

.pagination-link {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-3);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  text-decoration: none;
  transition: all var(--transition-fast);
}
.pagination-link:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
  color: var(--color-text-primary);
}
.pagination-link.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}
.pagination-link.disabled {
  opacity: 0.4;
  pointer-events: none;
}

.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
  z-index: var(--z-fixed);
}
.back-to-top:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
@media (min-width: 768px) {
  .back-to-top {
    display: none;
  }
}
@media (min-width: 1024px) {
  .back-to-top {
    display: flex;
  }
}

.note-card-inline {
  font-family: var(--font-hand);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-5) 0;
  box-shadow: var(--shadow-paper);
  line-height: var(--leading-relaxed);
}
.note-card-inline .note-card-inline-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.note-card-inline p:last-child {
  margin-bottom: 0;
}

.sketch-diagram {
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-surface);
  position: relative;
  box-shadow: var(--shadow-paper);
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-hand);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
}
.sketch-diagram svg, .sketch-diagram img {
  max-width: 100%;
  height: auto;
}

.shadow-paper {
  box-shadow: var(--shadow-paper);
}

.article-body.notebook-lined {
  position: relative;
  padding-left: 64px;
}
.article-body.notebook-lined::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 48px;
  width: 1px;
  background: linear-gradient(180deg, rgba(180, 120, 100, 0.2) 0%, rgba(180, 120, 100, 0.08) 100%);
  pointer-events: none;
}

[data-theme=dark] .article-body.notebook-lined::before {
  background: linear-gradient(180deg, rgba(180, 120, 100, 0.12) 0%, rgba(180, 120, 100, 0.05) 100%);
}

.learning-path-container {
  padding: var(--space-4);
  background: var(--color-bg-alt);
  border-left: 4px solid var(--color-primary);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-8);
}
.learning-path-container.primary {
  border-color: var(--color-primary);
}
.learning-path-container.success {
  border-color: var(--color-success);
}
.learning-path-container.warning {
  border-color: var(--color-warning);
}
.learning-path-container.danger {
  border-color: var(--color-danger);
}
.learning-path-container.text-secondary {
  border-color: var(--color-text-secondary);
}
.learning-path-container.info {
  border-color: #3B82F6;
}

.learning-path-item {
  margin-bottom: var(--space-2);
}
.learning-path-item:last-child {
  margin-bottom: 0;
}

.learning-path-link {
  text-decoration: none;
  font-weight: var(--weight-medium);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}
.learning-path-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.learning-path-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}
.learning-path-link::before {
  content: "↓";
  display: inline-block;
}

.series-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.series-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.series-title {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  text-transform: capitalize;
}

.series-link {
  text-decoration: none;
  color: var(--color-primary);
  font-weight: var(--weight-normal);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  transition: all var(--transition-fast);
}
.series-link:hover {
  color: var(--color-primary-hover);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}
.series-link:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}
.series-link::before {
  content: "→";
  display: inline-block;
}

.series-empty {
  color: var(--color-text-secondary);
  margin: 0;
}

.concepts-container {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}
.concepts-container .badge {
  text-decoration: none;
}

.topics-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-8);
}
@media (min-width: 768px) {
  .topics-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.topic-card {
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-bg-alt);
  transition: all var(--transition-base);
}
.topic-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.topic-card-title {
  margin-top: 0;
  margin-bottom: var(--space-2);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
}
.topic-card-title a {
  text-decoration: none;
  color: var(--color-primary);
  transition: color var(--transition-fast);
}
.topic-card-title a:hover {
  text-decoration: underline;
  color: var(--color-primary-hover);
}
.topic-card-title a:focus-visible {
  outline: none;
  box-shadow: var(--focus-ring);
  border-radius: var(--radius-sm);
}

.topic-card-count {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}
.topic-card-count strong {
  color: var(--color-text-primary);
}

.topic-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.paper-texture {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

[data-theme=dark] .paper-texture {
  opacity: 0.025;
}

.notebook-margin {
  position: relative;
}
.notebook-margin::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 48px;
  width: 1px;
  background: linear-gradient(180deg, rgba(180, 120, 100, 0.25) 0%, rgba(180, 120, 100, 0.15) 100%);
  pointer-events: none;
}

[data-theme=dark] .notebook-margin::before {
  background: linear-gradient(180deg, rgba(180, 120, 100, 0.15) 0%, rgba(180, 120, 100, 0.08) 100%);
}

.note-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: var(--space-5) var(--space-6);
  box-shadow: var(--shadow-paper);
  position: relative;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}
.note-card:hover {
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}

.note-card-sticky {
  background: #FEF9E7;
  border: 1px solid rgba(166, 124, 82, 0.2);
  border-radius: var(--radius-sm);
  padding: var(--space-5) var(--space-6);
  box-shadow: 0 2px 8px rgba(44, 36, 22, 0.08), 0 1px 2px rgba(44, 36, 22, 0.06);
  position: relative;
  transform: rotate(-0.5deg);
  transition: transform var(--transition-base);
}
.note-card-sticky:hover {
  transform: rotate(0deg) translateY(-2px);
}
.note-card-sticky::after {
  content: "";
  position: absolute;
  top: -1px;
  right: 16px;
  width: 12px;
  height: 12px;
  background: linear-gradient(135deg, transparent 40%, rgba(166, 124, 82, 0.15) 40%, rgba(166, 124, 82, 0.15) 60%, transparent 60%);
  border-radius: 0 0 2px 2px;
}

[data-theme=dark] .note-card-sticky {
  background: #2A2820;
  border-color: rgba(196, 154, 120, 0.15);
}
[data-theme=dark] .note-card-sticky::after {
  background: linear-gradient(135deg, transparent 40%, rgba(196, 154, 120, 0.12) 40%, rgba(196, 154, 120, 0.12) 60%, transparent 60%);
}

.sketch-box {
  border: 2px solid var(--color-border-strong);
  border-radius: var(--radius-sm);
  padding: var(--space-6);
  margin: var(--space-6) 0;
  background: var(--color-surface);
  position: relative;
  box-shadow: var(--shadow-paper);
}
.sketch-box::before {
  content: "⌇";
  position: absolute;
  top: -10px;
  left: var(--space-4);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  background: var(--color-bg);
  padding: 0 var(--space-2);
  line-height: 1;
}

.field-note {
  font-family: var(--font-hand);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  background: var(--color-bg-alt);
  border-left: 3px solid var(--color-primary);
  padding: var(--space-4) var(--space-5);
  margin: var(--space-5) 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: var(--leading-relaxed);
}
.field-note .field-note-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}
.field-note p:last-child {
  margin-bottom: 0;
}

.sticky-note {
  display: inline-block;
  font-family: var(--font-hand);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  background: #FEF9E7;
  border: 1px solid rgba(166, 124, 82, 0.2);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-4);
  box-shadow: var(--shadow-xs);
  transform: rotate(1deg);
  white-space: nowrap;
}
.sticky-note:hover {
  transform: rotate(0deg);
}

[data-theme=dark] .sticky-note {
  background: #2A2820;
  border-color: rgba(196, 154, 120, 0.15);
}

@media (min-width: 1024px) {
  .has-margin-note {
    position: relative;
  }
  .margin-annotation {
    position: absolute;
    right: calc(100% + 24px);
    top: 0;
    width: 180px;
    font-family: var(--font-hand);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    line-height: var(--leading-snug);
    text-align: right;
  }
  .margin-annotation::before {
    content: "→ ";
    color: var(--color-primary);
    font-size: var(--text-xs);
  }
}
.article-body p, .article-body li {
  font-family: var(--font-sans);
  color: var(--color-text-primary);
}

.article-title {
  font-family: var(--font-serif);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
}

.article-notebook-label {
  display: inline-flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
}

.notebook-label-text {
  font-family: var(--font-hand);
  font-size: var(--text-lg);
  color: var(--color-primary);
}

.notebook-label-number {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.article-meta {
  gap: var(--space-2);
}

.article-meta-sep {
  color: var(--color-text-muted);
}

pre, .highlight {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}

code:not(pre > code) {
  font-family: var(--font-mono);
  background: var(--color-bg-code-inline);
  color: var(--color-text-code);
  border: 1px solid transparent;
}

table {
  border-collapse: collapse;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}
table th {
  background: var(--color-bg-alt);
  font-family: var(--font-serif);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  border-bottom: 2px solid var(--color-border-strong);
}
table td {
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}
table tr:last-child td {
  border-bottom: none;
}
table tr:hover td {
  background: var(--color-surface-hover);
}

.hero {
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}
.hero .hero-kicker {
  font-family: var(--font-hand);
  font-size: var(--text-base);
  color: var(--color-primary);
  text-transform: none;
  letter-spacing: normal;
}
.hero .hero-title {
  font-family: var(--font-serif);
}

.hero-observatory {
  background: var(--color-bg);
}

.section-kicker {
  font-family: var(--font-hand);
  font-size: var(--text-base);
  color: var(--color-primary);
  text-transform: none;
  letter-spacing: normal;
}

.badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
}

.badge-primary {
  background: var(--color-primary-muted);
  color: var(--color-primary);
  border: 1px solid var(--color-primary-muted);
}

hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--color-border-strong) 20%, var(--color-border-strong) 80%, transparent 100%);
  margin: var(--space-10) 0;
}

a {
  text-decoration: none;
  text-underline-offset: 3px;
}
a:hover {
  text-decoration: underline;
  text-decoration-style: wavy;
  text-decoration-color: var(--color-primary-muted);
  text-underline-offset: 3px;
}

.observation-list .observation-item {
  border-top: 1px solid var(--color-border);
  padding: var(--space-5) 0;
}

.note-list .note-row {
  border-top: 1px solid var(--color-border);
}

.navbar {
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.navbar.scrolled {
  background: color-mix(in srgb, var(--color-bg) 97%, transparent);
  box-shadow: var(--shadow-xs);
}

.footer-compact {
  border-top: 1px solid var(--color-border);
  background: var(--color-bg);
}

.observatory-hero {
  background: var(--color-bg);
}

.observatory-hero-bg {
  display: none;
}

.observatory-section .observatory-section-title {
  font-family: var(--font-serif);
}

.insight-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}

.observatory-kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}

.observatory-table-card,
.observatory-chart-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}

.toc {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}

.toc-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  color: var(--color-text-muted);
}

.reading-progress {
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  height: 2px;
  box-shadow: none;
}

details {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
  background: var(--color-surface);
}

.btn {
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-xs);
}
.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: var(--shadow-sm);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text-primary);
  border-color: var(--color-border);
  box-shadow: var(--shadow-xs);
}
.btn-secondary:hover:not(:disabled) {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover:not(:disabled) {
  background: var(--color-primary-muted);
  color: var(--color-primary-hover);
}

.search-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
}

.search-overlay {
  background: var(--overlay-backdrop);
  backdrop-filter: blur(4px);
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}

.card-glass {
  background: color-mix(in srgb, var(--color-surface) 60%, transparent);
  border: 1px solid var(--color-border);
  backdrop-filter: blur(12px);
}

.feature-card {
  border-radius: var(--radius-sm);
}

.quote-block {
  font-family: var(--font-hand);
  font-size: var(--text-xl);
  background: linear-gradient(135deg, var(--color-primary-muted) 0%, var(--color-surface) 100%);
  border: 1px solid var(--color-primary-muted);
  border-radius: var(--radius-sm);
}
.quote-block::before {
  font-family: var(--font-serif);
}

.timeline::before {
  background: var(--color-border);
}

.decision-flow-card {
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-paper);
}

@media (max-width: 767px) {
  .margin-annotation {
    display: none;
  }
  .notebook-margin::before {
    display: none;
  }
  .note-card-sticky {
    transform: none;
  }
}
.hero-notebook-entry {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-hand);
  font-size: var(--text-sm);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-muted);
  border-radius: var(--radius-sm);
  letter-spacing: 0.02em;
}
.hero-notebook-entry::before {
  content: "✎";
  font-size: var(--text-base);
  line-height: 1;
}

[data-theme=dark] .hero-notebook-entry {
  background: var(--color-primary-muted);
}

.project-log-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.project-log-item {
  display: grid;
  grid-template-columns: 2.5rem 1fr;
  gap: var(--space-4);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}
.project-log-item:hover {
  background: var(--color-surface-hover);
  margin: 0 calc(-1 * var(--space-4));
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  border-radius: var(--radius-sm);
}
.project-log-item:last-child {
  border-bottom: 1px solid var(--color-border);
}

.project-log-number {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-top: 2px;
  text-align: right;
}

.project-log-body {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.project-log-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-1);
}

.project-log-status {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: var(--tracking-wide);
}
.project-log-status::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  display: inline-block;
}

.status-active::before {
  background: var(--color-success);
}

.status-beta::before {
  background: var(--color-warning);
}

.status-planning::before {
  background: var(--color-text-muted);
}

.project-log-title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  line-height: var(--leading-snug);
}

.project-log-desc {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  font-style: normal;
}

.note-row-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-align: right;
}

.note-row {
  transition: background var(--transition-fast), padding var(--transition-fast);
}
.note-row:hover {
  background: var(--color-surface-hover);
  margin: 0 calc(-1 * var(--space-4));
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  border-radius: var(--radius-sm);
}

@media (min-width: 768px) {
  .note-row-number {
    text-align: right;
  }
}
.paper-lift {
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}
.paper-lift:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.pencil-underline {
  display: inline;
  background-image: linear-gradient(to bottom, transparent 85%, var(--color-primary-muted) 85%, var(--color-primary-muted) 90%, transparent 90%);
  background-size: 100% 100%;
  background-repeat: no-repeat;
}

.ruled-line {
  border: none;
  height: 1px;
  background: repeating-linear-gradient(90deg, var(--color-border) 0px, var(--color-border) 100%, transparent 100%, transparent 100%);
}

.observation-mark {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.observation-item {
  transition: background var(--transition-fast), padding var(--transition-fast);
}
.observation-item:hover {
  background: var(--color-surface-hover);
  margin: 0 calc(-1 * var(--space-4));
  padding-left: var(--space-4);
  padding-right: var(--space-4);
  border-radius: var(--radius-sm);
}

.section-workbench .section-kicker {
  font-family: var(--font-hand);
  font-size: var(--text-base);
  color: var(--color-primary);
  text-transform: none;
  letter-spacing: normal;
}

.related-concepts {
  margin-top: var(--space-8);
  padding: var(--space-4);
  background: var(--color-bg-alt);
  border-radius: 8px;
  border: 1px solid var(--color-border);
}
.related-concepts h4 {
  margin-top: 0;
  font-size: 1rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.related-concepts .badge {
  text-decoration: none;
}

.learning-path {
  max-width: 800px;
  margin: 0 auto var(--space-8) auto;
  padding: var(--space-4) 20px;
  border-left: 4px solid var(--color-primary);
  background: var(--color-bg-alt);
}
.learning-path h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-3);
  color: var(--color-text-primary);
}
.learning-path > div {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: 0.95rem;
}

.learning-path-item {
  padding: 4px 0;
}
.learning-path-item.is-current {
  font-weight: 600;
  color: var(--color-primary);
}
.learning-path-item:not(.is-current) {
  color: var(--color-text-secondary);
}
.learning-path-item a {
  color: inherit;
  text-decoration: none;
}

.related-articles-compact {
  max-width: 800px;
  margin: 0 auto var(--space-4) auto;
  padding: 0 20px;
}
.related-articles-compact h3 {
  font-size: 1.1rem;
  margin-bottom: var(--space-3);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.related-articles-compact ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.related-articles-compact a {
  color: var(--color-text-primary);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
  display: block;
  line-height: 1.3;
}

.article-content {
  margin-bottom: var(--space-8);
}

.author-card-wrapper {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 20px;
}

.continue-exploring {
  padding-top: 0;
  margin-top: 0;
  border-top: none;
}
.continue-exploring h3 {
  text-align: center;
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
  font-size: 1.2rem;
}

.continue-exploring-grid {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-4) 20px var(--space-8) 20px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3);
}
.continue-exploring-grid .btn {
  text-align: center;
  justify-content: center;
  width: 100%;
  border-color: var(--color-border);
  color: var(--color-text-primary);
}

.observatory-hero {
  position: relative;
  padding: var(--space-24) 0 var(--space-12);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-elevated) 100%);
}

.observatory-hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  background-image: radial-gradient(circle at 20% 30%, var(--color-primary) 0%, transparent 50%), radial-gradient(circle at 80% 70%, var(--color-success) 0%, transparent 50%), radial-gradient(circle at 50% 50%, var(--color-warning) 0%, transparent 70%);
  filter: blur(100px);
}

.observatory-hero-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.observatory-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-success-muted);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  color: var(--color-success);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.6s var(--ease-out-expo);
}

.observatory-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

.observatory-title {
  font-size: var(--text-4xl);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  animation: fadeInUp 0.6s var(--ease-out-expo) 0.1s both;
}
@media (min-width: 768px) {
  .observatory-title {
    font-size: var(--text-5xl);
  }
}

.observatory-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin-bottom: var(--space-6);
  animation: fadeInUp 0.6s var(--ease-out-expo) 0.2s both;
}
@media (min-width: 768px) {
  .observatory-subtitle {
    font-size: var(--text-xl);
  }
}

.observatory-meta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-4);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  animation: fadeInUp 0.6s var(--ease-out-expo) 0.3s both;
}

.observatory-meta-item {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.observatory-meta-item svg {
  opacity: 0.7;
}

.observatory-nav {
  position: sticky;
  top: 64px;
  z-index: var(--z-sticky);
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.observatory-nav .container {
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.observatory-nav .container::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.observatory-nav .container::-webkit-scrollbar-track {
  background: transparent;
}
.observatory-nav .container::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.observatory-nav .container::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}

.observatory-tabs {
  display: flex;
  gap: var(--space-1);
  padding: var(--space-3) 0;
  min-width: max-content;
}

.observatory-tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-muted);
  background: none;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.observatory-tab:hover {
  color: var(--color-text-primary);
  background: var(--color-surface);
}
.observatory-tab.active {
  color: var(--color-primary);
  background: var(--color-primary-muted);
}
.observatory-tab svg {
  opacity: 0.7;
}
.observatory-tab.active svg {
  opacity: 1;
}

.observatory-section {
  padding: var(--space-12) 0;
}
@media (min-width: 768px) {
  .observatory-section {
    padding: var(--space-16) 0;
  }
}

.observatory-section-header {
  margin-bottom: var(--space-8);
}

.observatory-section-title {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-2);
}
@media (min-width: 768px) {
  .observatory-section-title {
    font-size: var(--text-3xl);
  }
}
.observatory-section-title svg {
  color: var(--color-primary);
}

.observatory-section-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin: 0;
}

.insights-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}
@media (min-width: 768px) {
  .insights-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .insights-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (min-width: 1280px) {
  .insights-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.insight-card {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}
.insight-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.insight-card.insight-positive {
  border-left: 3px solid var(--color-success);
}
.insight-card.insight-warning {
  border-left: 3px solid var(--color-warning);
}
.insight-card.insight-neutral {
  border-left: 3px solid var(--color-text-muted);
}

.insight-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}
.insight-icon.insight-icon-positive {
  background: var(--color-success-muted);
  color: var(--color-success);
}
.insight-icon.insight-icon-warning {
  background: var(--color-warning-muted);
  color: var(--color-warning);
}
.insight-icon.insight-icon-neutral {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.insight-content {
  flex: 1;
  min-width: 0;
}

.insight-metric {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  line-height: 1;
  margin-bottom: var(--space-1);
}

.insight-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-2);
}

.insight-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-1);
  line-height: var(--leading-snug);
}

.insight-description {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: var(--leading-relaxed);
  margin: 0;
}

.observatory-kpi-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}
@media (min-width: 768px) {
  .observatory-kpi-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (min-width: 1024px) {
  .observatory-kpi-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.observatory-kpi-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  text-align: center;
  transition: all var(--transition-base);
}
.observatory-kpi-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-sm);
}

.observatory-kpi-value {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  line-height: 1;
  letter-spacing: var(--tracking-tight);
  margin-bottom: var(--space-1);
}
@media (min-width: 768px) {
  .observatory-kpi-value {
    font-size: var(--text-4xl);
  }
}

.observatory-kpi-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  font-weight: var(--weight-medium);
}

.observatory-kpi-trend {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  margin-top: var(--space-3);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-full);
}
.observatory-kpi-trend.up {
  background: var(--color-success-muted);
  color: var(--color-success);
}
.observatory-kpi-trend.down {
  background: var(--color-danger-muted);
  color: var(--color-danger);
}
.observatory-kpi-trend.neutral {
  background: var(--color-surface);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}

.observatory-charts-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}
@media (min-width: 768px) {
  .observatory-charts-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

.observatory-chart-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
@media (min-width: 768px) {
  .observatory-chart-card.observatory-chart-full {
    grid-column: 1/-1;
  }
}

.observatory-chart-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
}
.observatory-chart-header h3 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
}

.observatory-chart-body {
  padding: var(--space-5) var(--space-6);
  height: 300px;
  position: relative;
}
.observatory-chart-body canvas {
  width: 100% !important;
  height: 100% !important;
}

.observatory-tables-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-bottom: var(--space-6);
}
@media (min-width: 768px) {
  .observatory-tables-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

.observatory-table-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
@media (min-width: 768px) {
  .observatory-table-card.observatory-table-full {
    grid-column: 1/-1;
  }
}

.observatory-table-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.observatory-table-header h3 {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.observatory-table-body {
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.observatory-table-body::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
.observatory-table-body::-webkit-scrollbar-track {
  background: transparent;
}
.observatory-table-body::-webkit-scrollbar-thumb {
  background-color: var(--color-border-strong);
  border-radius: 9999px;
  border: 2px solid transparent;
  background-clip: content-box;
}
.observatory-table-body::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}

.observatory-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--text-sm);
}
.observatory-table th {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  font-size: var(--text-xs);
  letter-spacing: var(--tracking-wide);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
  background: var(--color-bg-elevated);
}
.observatory-table td {
  padding: var(--space-3) var(--space-4);
  color: var(--color-text-secondary);
  border-bottom: 1px solid var(--color-border);
  white-space: nowrap;
}
.observatory-table tr:last-child td {
  border-bottom: none;
}
.observatory-table tr:hover td {
  background: var(--color-surface-hover);
}

.observatory-text-primary {
  color: var(--color-text-primary) !important;
  font-weight: var(--weight-medium);
}

.observatory-text-success {
  color: var(--color-success) !important;
}

.observatory-text-danger {
  color: var(--color-danger) !important;
}

.observatory-link {
  text-decoration: none;
  transition: color var(--transition-fast);
}
.observatory-link:hover {
  color: var(--color-primary) !important;
  text-decoration: underline;
}

.observatory-code {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-1) var(--space-2);
  background: var(--color-bg-code);
  border-radius: var(--radius-sm);
  color: var(--color-text-code);
}

.observatory-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.observatory-badge-success {
  background: var(--color-success-muted);
  color: var(--color-success);
}

.observatory-badge-outline {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

.observatory-reading-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.observatory-reading-stat {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}
.observatory-reading-stat:hover {
  border-color: var(--color-border-strong);
}

.observatory-reading-stat-value {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: var(--space-1);
}

.observatory-reading-stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  font-weight: var(--weight-medium);
}

.observatory-reading-buckets {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.observatory-reading-bucket {
  display: grid;
  grid-template-columns: 56px 1fr 36px;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
}

.observatory-reading-bucket-label {
  color: var(--color-text-muted);
  font-weight: var(--weight-medium);
}

.observatory-reading-bucket-value {
  color: var(--color-text-secondary);
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.observatory-reading-bucket-track {
  height: 8px;
  background: var(--color-bg-elevated);
  border-radius: var(--radius-full);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.observatory-reading-bucket-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-primary), var(--color-success));
  transition: width 0.6s var(--ease-out-expo);
}

.observatory-reading-note {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  opacity: 0.8;
}

.observatory-health-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.observatory-health-item:last-child {
  border-bottom: none;
}

.observatory-health-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.observatory-health-value {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-primary);
}

.observatory-streak-visual {
  display: flex;
  justify-content: center;
  padding: var(--space-6) 0;
}

.observatory-streak-circle {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-success));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 24px var(--color-primary-glow);
}

.observatory-streak-number {
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: white;
  line-height: 1;
}

.observatory-streak-label {
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.8);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.observatory-streak-details {
  padding: 0 var(--space-4) var(--space-4);
}

.observatory-graph-body {
  height: 500px;
  position: relative;
  overflow: hidden;
}
.observatory-graph-body canvas {
  display: block;
  width: 100% !important;
  height: 100% !important;
}

.observatory-graph-tooltip {
  position: fixed;
  z-index: var(--z-tooltip);
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-4);
  box-shadow: var(--shadow-lg);
  pointer-events: none;
  display: none;
  max-width: 280px;
  backdrop-filter: blur(12px);
  animation: fadeIn 0.15s ease-out;
}

.observatory-graph-tooltip-category {
  font-size: var(--text-sm);
  font-weight: var(--weight-bold);
  margin-bottom: var(--space-1);
}

.observatory-graph-tooltip-title {
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin-bottom: var(--space-1);
  line-height: var(--leading-snug);
}

.observatory-graph-tooltip-stat {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (max-width: 767px) {
  .observatory-graph-body {
    height: 360px;
  }
}
.observatory-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  gap: var(--space-4);
  color: var(--color-text-muted);
  grid-column: 1/-1;
}

.observatory-spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

.observatory-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-12);
  text-align: center;
  color: var(--color-text-muted);
  grid-column: 1/-1;
}
.observatory-empty svg {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  opacity: 0.5;
}
.observatory-empty p {
  margin: 0;
  font-size: var(--text-sm);
}

@media (max-width: 767px) {
  .observatory-hero {
    padding: var(--space-20) 0 var(--space-8);
  }
  .observatory-title {
    font-size: var(--text-3xl);
  }
  .observatory-kpi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .observatory-kpi-value {
    font-size: var(--text-2xl);
  }
  .insight-card {
    flex-direction: column;
    gap: var(--space-3);
  }
  .insight-icon {
    width: 36px;
    height: 36px;
  }
  .observatory-chart-body {
    height: 240px;
    padding: var(--space-4);
  }
}
@media (max-width: 479px) {
  .observatory-tabs {
    padding: var(--space-2) 0;
  }
  .observatory-tab {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
  .observatory-kpi-grid {
    grid-template-columns: 1fr;
  }
  .observatory-charts-row,
  .observatory-tables-row {
    grid-template-columns: 1fr;
  }
}

/*# sourceMappingURL=style.css.map */