/* Material Design 3 (Material You) Design System for agy-skills */

:root,
[data-theme="light"] {
  /* M3 Light Tonal Palette (Seed: Antigravity Blue #1A73E8) */
  --md-sys-color-primary: #005ac1;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #d8e2ff;
  --md-sys-color-on-primary-container: #001a41;
  --md-sys-color-primary-fixed: #d8e2ff;
  --md-sys-color-on-primary-fixed: #001a41;
  --md-sys-color-primary-fixed-dim: #adc6ff;
  --md-sys-color-on-primary-fixed-variant: #004494;

  --md-sys-color-secondary: #575e71;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #dce2f9;
  --md-sys-color-on-secondary-container: #141b2c;

  --md-sys-color-tertiary: #715573;
  --md-sys-color-on-tertiary: #ffffff;
  --md-sys-color-tertiary-container: #fbd7fc;
  --md-sys-color-on-tertiary-container: #29132d;

  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #ffffff;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error-container: #410002;

  --md-sys-color-background: #fdfcff;
  --md-sys-color-on-background: #1a1c1e;
  --md-sys-color-surface: #fdfcff;
  --md-sys-color-on-surface: #1a1c1e;
  --md-sys-color-surface-variant: #e1e2ec;
  --md-sys-color-on-surface-variant: #44474f;
  --md-sys-color-outline: #74777f;
  --md-sys-color-outline-variant: #c4c6d0;

  --md-sys-color-surface-dim: #ded8e1;
  --md-sys-color-surface-bright: #fdfcff;
  --md-sys-color-surface-container-lowest: #ffffff;
  --md-sys-color-surface-container-low: #f7f2fa;
  --md-sys-color-surface-container: #f3edf7;
  --md-sys-color-surface-container-high: #ece6f0;
  --md-sys-color-surface-container-highest: #e6e0e9;

  --md-sys-color-inverse-surface: #2f3033;
  --md-sys-color-inverse-on-surface: #f1f0f4;
  --md-sys-color-inverse-primary: #adc6ff;
  --md-sys-color-shadow: rgba(0, 0, 0, 0.2);
  --md-sys-color-scrim: rgba(0, 0, 0, 0.4);

  /* Code Syntax Highlighting (Light) */
  --m3-code-bg: #f8fafc;
  --m3-code-header-bg: #eef2f6;
  --m3-code-border: #e2e8f0;
  --m3-code-text: #1e293b;
  --m3-code-keyword: #005ac1;
  --m3-code-string: #0d6832;
  --m3-code-comment: #64748b;
}

[data-theme="dark"] {
  /* M3 Dark Tonal Palette */
  --md-sys-color-primary: #adc6ff;
  --md-sys-color-on-primary: #002e69;
  --md-sys-color-primary-container: #004494;
  --md-sys-color-on-primary-container: #d8e2ff;
  --md-sys-color-primary-fixed: #d8e2ff;
  --md-sys-color-on-primary-fixed: #001a41;
  --md-sys-color-primary-fixed-dim: #adc6ff;
  --md-sys-color-on-primary-fixed-variant: #004494;

  --md-sys-color-secondary: #bfc6dc;
  --md-sys-color-on-secondary: #293041;
  --md-sys-color-secondary-container: #3f4759;
  --md-sys-color-on-secondary-container: #dce2f9;

  --md-sys-color-tertiary: #dfbbde;
  --md-sys-color-on-tertiary: #402843;
  --md-sys-color-tertiary-container: #583e5a;
  --md-sys-color-on-tertiary-container: #fbd7fc;

  --md-sys-color-error: #ffb4ab;
  --md-sys-color-on-error: #690005;
  --md-sys-color-error-container: #93000a;
  --md-sys-color-on-error-container: #ffdad6;

  --md-sys-color-background: #111318;
  --md-sys-color-on-background: #e2e2e9;
  --md-sys-color-surface: #111318;
  --md-sys-color-on-surface: #e2e2e9;
  --md-sys-color-surface-variant: #44474f;
  --md-sys-color-on-surface-variant: #c4c6d0;
  --md-sys-color-outline: #8e9099;
  --md-sys-color-outline-variant: #44474f;

  --md-sys-color-surface-dim: #111318;
  --md-sys-color-surface-bright: #37393e;
  --md-sys-color-surface-container-lowest: #0c0e13;
  --md-sys-color-surface-container-low: #191c20;
  --md-sys-color-surface-container: #1d2024;
  --md-sys-color-surface-container-high: #282a2f;
  --md-sys-color-surface-container-highest: #33353a;

  --md-sys-color-inverse-surface: #e2e2e9;
  --md-sys-color-inverse-on-surface: #2f3033;
  --md-sys-color-inverse-primary: #005ac1;
  --md-sys-color-shadow: rgba(0, 0, 0, 0.6);
  --md-sys-color-scrim: rgba(0, 0, 0, 0.7);

  /* Code Syntax Highlighting (Dark) */
  --m3-code-bg: #14171d;
  --m3-code-header-bg: #1b1f27;
  --m3-code-border: #2d3340;
  --m3-code-text: #e2e8f0;
  --m3-code-keyword: #93c5fd;
  --m3-code-string: #86efac;
  --m3-code-comment: #94a3b8;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --md-sys-color-primary: #adc6ff;
    --md-sys-color-on-primary: #002e69;
    --md-sys-color-primary-container: #004494;
    --md-sys-color-on-primary-container: #d8e2ff;
    --md-sys-color-primary-fixed: #d8e2ff;
    --md-sys-color-on-primary-fixed: #001a41;
    --md-sys-color-primary-fixed-dim: #adc6ff;
    --md-sys-color-on-primary-fixed-variant: #004494;

    --md-sys-color-secondary: #bfc6dc;
    --md-sys-color-on-secondary: #293041;
    --md-sys-color-secondary-container: #3f4759;
    --md-sys-color-on-secondary-container: #dce2f9;

    --md-sys-color-tertiary: #dfbbde;
    --md-sys-color-on-tertiary: #402843;
    --md-sys-color-tertiary-container: #583e5a;
    --md-sys-color-on-tertiary-container: #fbd7fc;

    --md-sys-color-error: #ffb4ab;
    --md-sys-color-on-error: #690005;
    --md-sys-color-error-container: #93000a;
    --md-sys-color-on-error-container: #ffdad6;

    --md-sys-color-background: #111318;
    --md-sys-color-on-background: #e2e2e9;
    --md-sys-color-surface: #111318;
    --md-sys-color-on-surface: #e2e2e9;
    --md-sys-color-surface-variant: #44474f;
    --md-sys-color-on-surface-variant: #c4c6d0;
    --md-sys-color-outline: #8e9099;
    --md-sys-color-outline-variant: #44474f;

    --md-sys-color-surface-dim: #111318;
    --md-sys-color-surface-bright: #37393e;
    --md-sys-color-surface-container-lowest: #0c0e13;
    --md-sys-color-surface-container-low: #191c20;
    --md-sys-color-surface-container: #1d2024;
    --md-sys-color-surface-container-high: #282a2f;
    --md-sys-color-surface-container-highest: #33353a;

    --md-sys-color-inverse-surface: #e2e2e9;
    --md-sys-color-inverse-on-surface: #2f3033;
    --md-sys-color-inverse-primary: #005ac1;
    --md-sys-color-shadow: rgba(0, 0, 0, 0.6);
    --md-sys-color-scrim: rgba(0, 0, 0, 0.7);

    --m3-code-bg: #14171d;
    --m3-code-header-bg: #1b1f27;
    --m3-code-border: #2d3340;
    --m3-code-text: #e2e8f0;
    --m3-code-keyword: #93c5fd;
    --m3-code-string: #86efac;
    --m3-code-comment: #94a3b8;
  }
}

:root {
  /* M3 Shape Corner Tokens */
  --md-sys-shape-corner-none: 0px;
  --md-sys-shape-corner-extra-small: 4px;
  --md-sys-shape-corner-small: 8px;
  --md-sys-shape-corner-medium: 12px;
  --md-sys-shape-corner-large: 16px;
  --md-sys-shape-corner-extra-large: 28px;
  --md-sys-shape-corner-full: 9999px;

  /* M3 Typography Scale Tokens */
  --md-sys-typescale-brand-font: 'Google Sans', 'Roboto Flex', system-ui, sans-serif;
  --md-sys-typescale-plain-font: 'Roboto Flex', 'Roboto', system-ui, sans-serif;
  --md-sys-typescale-code-font: 'Roboto Mono', ui-monospace, SFMono-Regular, Menlo, monospace;

  --md-sys-typescale-display-large-size: 57px;
  --md-sys-typescale-display-large-line-height: 64px;
  --md-sys-typescale-headline-large-size: 32px;
  --md-sys-typescale-headline-large-line-height: 40px;
  --md-sys-typescale-headline-medium-size: 28px;
  --md-sys-typescale-headline-medium-line-height: 36px;
  --md-sys-typescale-headline-small-size: 24px;
  --md-sys-typescale-headline-small-line-height: 32px;

  --md-sys-typescale-title-large-size: 22px;
  --md-sys-typescale-title-large-line-height: 28px;
  --md-sys-typescale-title-medium-size: 16px;
  --md-sys-typescale-title-medium-line-height: 24px;
  --md-sys-typescale-title-small-size: 14px;
  --md-sys-typescale-title-small-line-height: 20px;

  --md-sys-typescale-body-large-size: 16px;
  --md-sys-typescale-body-large-line-height: 26px;
  --md-sys-typescale-body-medium-size: 14px;
  --md-sys-typescale-body-medium-line-height: 22px;
  --md-sys-typescale-body-small-size: 12px;
  --md-sys-typescale-body-small-line-height: 16px;

  --md-sys-typescale-label-large-size: 14px;
  --md-sys-typescale-label-large-line-height: 20px;
  --md-sys-typescale-label-medium-size: 12px;
  --md-sys-typescale-label-medium-line-height: 16px;
  --md-sys-typescale-label-small-size: 11px;
  --md-sys-typescale-label-small-line-height: 16px;

  /* M3 Elevations */
  --md-sys-elevation-0: none;
  --md-sys-elevation-1: 0px 1px 3px 1px var(--md-sys-color-shadow), 0px 1px 2px 0px var(--md-sys-color-shadow);
  --md-sys-elevation-2: 0px 2px 6px 2px var(--md-sys-color-shadow), 0px 1px 2px 0px var(--md-sys-color-shadow);
  --md-sys-elevation-3: 0px 4px 8px 3px var(--md-sys-color-shadow), 0px 1px 3px 0px var(--md-sys-color-shadow);

  /* Layout Dimensions */
  --m3-top-app-bar-height: 64px;
  --m3-nav-drawer-width: 290px;
}

/* Global Reset & Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--md-sys-typescale-plain-font);
  font-size: 16px;
  line-height: 1.6;
  color: var(--md-sys-color-on-background);
  background-color: var(--md-sys-color-background);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
}

/* Material Symbols Standard Alignment */
.material-symbols-outlined {
  font-family: 'Material Symbols Outlined';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  display: inline-block;
  vertical-align: middle;
  letter-spacing: normal;
  text-transform: none;
  white-space: nowrap;
  word-wrap: normal;
  direction: ltr;
  -webkit-font-feature-settings: 'liga';
  -webkit-font-smoothing: antialiased;
}

/* Top App Bar */
.m3-top-app-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--m3-top-app-bar-height);
  background-color: var(--md-sys-color-surface-container);
  color: var(--md-sys-color-on-surface);
  box-shadow: var(--md-sys-elevation-1);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  gap: 12px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.m3-top-app-bar-start {
  display: flex;
  align-items: center;
  gap: 12px;
}

.m3-icon-button {
  background: none;
  border: none;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: var(--md-sys-shape-corner-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--md-sys-color-on-surface-variant);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.m3-icon-button:hover {
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
}

.m3-icon-button:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

.m3-brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--md-sys-color-on-surface);
  font-family: var(--md-sys-typescale-brand-font);
  font-size: var(--md-sys-typescale-title-medium-size);
  font-weight: 700;
  letter-spacing: -0.2px;
}

.m3-brand-badge {
  background: linear-gradient(135deg, var(--md-sys-color-primary), var(--md-sys-color-tertiary));
  color: var(--md-sys-color-on-primary);
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--md-sys-shape-corner-full);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.m3-top-app-bar-center {
  flex: 1;
  max-width: 540px;
  margin: 0 12px;
}

.m3-search-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-full);
  cursor: pointer;
  font-family: var(--md-sys-typescale-plain-font);
  font-size: var(--md-sys-typescale-body-medium-size);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.m3-search-trigger:hover {
  background-color: var(--md-sys-color-surface-container-highest);
  border-color: var(--md-sys-color-outline);
  color: var(--md-sys-color-on-surface);
}

.m3-search-trigger-content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.m3-search-shortcut {
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface-variant);
  font-family: var(--md-sys-typescale-code-font);
  font-size: 11px;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: var(--md-sys-shape-corner-extra-small);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.m3-top-app-bar-end {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Adaptive App Layout Container */
.m3-app-shell {
  display: flex;
  flex: 1;
  min-height: calc(100vh - var(--m3-top-app-bar-height));
  position: relative;
}

/* Navigation Drawer */
.m3-nav-drawer {
  width: var(--m3-nav-drawer-width);
  background-color: var(--md-sys-color-surface-container-low);
  border-right: 1px solid var(--md-sys-color-outline-variant);
  padding: 16px 12px 32px 12px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  overflow-y: auto;
  height: calc(100vh - var(--m3-top-app-bar-height));
  position: sticky;
  top: var(--m3-top-app-bar-height);
  transition: transform 0.25s cubic-bezier(0.2, 0, 0, 1), background-color 0.2s ease;
  z-index: 90;
}

.m3-nav-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.m3-nav-section-title {
  font-family: var(--md-sys-typescale-brand-font);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 700;
  color: var(--md-sys-color-on-surface-variant);
  padding: 8px 16px 4px 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.m3-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-radius: var(--md-sys-shape-corner-full);
  text-decoration: none;
  color: var(--md-sys-color-on-surface-variant);
  font-family: var(--md-sys-typescale-plain-font);
  font-size: var(--md-sys-typescale-body-medium-size);
  font-weight: 500;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.m3-nav-item:hover {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
}

.m3-nav-item.active {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  font-weight: 700;
}

.m3-nav-item .material-symbols-outlined {
  font-size: 20px;
}

.m3-drawer-backdrop {
  display: none;
  position: fixed;
  top: var(--m3-top-app-bar-height);
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--md-sys-color-scrim);
  z-index: 85;
}

/* Main Content Area */
.m3-main-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 0;
  background-color: var(--md-sys-color-background);
}

.m3-content-wrapper {
  max-width: 960px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 24px 64px 24px;
}

/* Breadcrumbs */
.m3-breadcrumbs {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.m3-breadcrumbs-links {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: var(--md-sys-typescale-label-medium-size);
  color: var(--md-sys-color-on-surface-variant);
  flex-wrap: wrap;
}

.m3-breadcrumbs a {
  color: var(--md-sys-color-primary);
  text-decoration: none;
  font-weight: 500;
}

.m3-breadcrumbs a:hover {
  text-decoration: underline;
}

.m3-breadcrumbs-separator {
  color: var(--md-sys-color-outline);
}

.m3-page-badge-slot {
  display: flex;
  align-items: center;
}

.m3-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--md-sys-shape-corner-small);
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  line-height: 1.4;
  white-space: nowrap;
}

.m3-badge-user-invoked {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border: 1px solid var(--md-sys-color-primary);
}

.m3-badge-model-invoked {
  background-color: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
  border: 1px solid var(--md-sys-color-tertiary);
}

.m3-badge-dictionary {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  border: 1px solid var(--md-sys-color-secondary);
}

/* Markdown Typography & Elements */
.m3-markdown-body {
  font-family: var(--md-sys-typescale-plain-font);
  font-size: var(--md-sys-typescale-body-large-size);
  line-height: var(--md-sys-typescale-body-large-line-height);
  color: var(--md-sys-color-on-surface);
}

.m3-markdown-body h1 {
  font-family: var(--md-sys-typescale-brand-font);
  font-size: var(--md-sys-typescale-headline-large-size);
  line-height: var(--md-sys-typescale-headline-large-line-height);
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  margin: 0 0 16px 0;
  letter-spacing: -0.5px;
}

.m3-markdown-body h2 {
  font-family: var(--md-sys-typescale-brand-font);
  font-size: var(--md-sys-typescale-headline-small-size);
  line-height: var(--md-sys-typescale-headline-small-line-height);
  font-weight: 700;
  color: var(--md-sys-color-primary);
  margin: 40px 0 16px 0;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.m3-markdown-body h3 {
  font-family: var(--md-sys-typescale-brand-font);
  font-size: var(--md-sys-typescale-title-large-size);
  line-height: var(--md-sys-typescale-title-large-line-height);
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  margin: 28px 0 12px 0;
}

.m3-markdown-body h4 {
  font-family: var(--md-sys-typescale-brand-font);
  font-size: var(--md-sys-typescale-title-medium-size);
  line-height: var(--md-sys-typescale-title-medium-line-height);
  font-weight: 600;
  color: var(--md-sys-color-secondary);
  margin: 20px 0 8px 0;
}

.m3-markdown-body p {
  margin-bottom: 18px;
}

.m3-markdown-body a {
  color: var(--md-sys-color-primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  font-weight: 500;
  transition: color 0.15s ease;
}

.m3-markdown-body a:hover {
  color: var(--md-sys-color-tertiary);
}

.m3-markdown-body ul,
.m3-markdown-body ol {
  margin-bottom: 20px;
  padding-left: 28px;
}

.m3-markdown-body li {
  margin-bottom: 8px;
}

.m3-markdown-body hr {
  border: none;
  height: 1px;
  background-color: var(--md-sys-color-outline-variant);
  margin: 36px 0;
}

/* Tables */
.m3-markdown-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-medium);
  overflow: hidden;
  border: 1px solid var(--md-sys-color-outline-variant);
}

.m3-markdown-body th {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface);
  font-family: var(--md-sys-typescale-brand-font);
  font-weight: 700;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  font-size: var(--md-sys-typescale-body-medium-size);
}

.m3-markdown-body td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface);
  font-size: var(--md-sys-typescale-body-medium-size);
}

.m3-markdown-body tr:last-child td {
  border-bottom: none;
}

.m3-markdown-body tr:hover td {
  background-color: var(--md-sys-color-surface-container);
}

/* Blockquotes & Callouts */
.m3-markdown-body blockquote {
  background-color: var(--md-sys-color-surface-container);
  border-left: 4px solid var(--md-sys-color-primary);
  border-radius: 0 var(--md-sys-shape-corner-medium) var(--md-sys-shape-corner-medium) 0;
  padding: 16px 20px;
  margin: 20px 0;
  color: var(--md-sys-color-on-surface);
  font-style: normal;
}

.m3-markdown-body blockquote p:last-child {
  margin-bottom: 0;
}

/* Inline Code */
.m3-markdown-body :not(pre) > code {
  font-family: var(--md-sys-typescale-code-font);
  font-size: 0.88em;
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-primary);
  padding: 2px 6px;
  border-radius: var(--md-sys-shape-corner-extra-small);
  border: 1px solid var(--md-sys-color-outline-variant);
}

/* Code Blocks Container with M3 Surface */
.m3-code-wrapper {
  position: relative;
  background-color: var(--m3-code-bg);
  border: 1px solid var(--m3-code-border);
  border-radius: var(--md-sys-shape-corner-large);
  margin: 24px 0;
  overflow: hidden;
  box-shadow: var(--md-sys-elevation-1);
}

.m3-code-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 14px;
  background-color: var(--m3-code-header-bg);
  border-bottom: 1px solid var(--m3-code-border);
  font-family: var(--md-sys-typescale-code-font);
  font-size: 12px;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
}

.m3-code-copy-btn {
  background: none;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  padding: 4px 10px;
  font-size: 12px;
  font-family: var(--md-sys-typescale-plain-font);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: all 0.15s ease;
}

.m3-code-copy-btn:hover {
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
  border-color: var(--md-sys-color-outline);
}

.m3-code-wrapper pre {
  margin: 0;
  padding: 16px;
  overflow-x: auto;
  background-color: var(--m3-code-bg);
  color: var(--m3-code-text);
  font-family: var(--md-sys-typescale-code-font);
  font-size: 13.5px;
  line-height: 1.5;
}

.m3-code-wrapper pre code {
  background: none;
  border: none;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

/* Chips and Badges */
.m3-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--md-sys-shape-corner-small);
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  border: 1px solid var(--md-sys-color-outline-variant);
  font-size: var(--md-sys-typescale-label-large-size);
  font-weight: 500;
  text-decoration: none;
}

.m3-chip:hover {
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
}

/* Mermaid Diagrams Container */
.m3-mermaid-container {
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 24px;
  margin: 24px 0;
  overflow-x: auto;
  text-align: center;
  display: flex;
  justify-content: center;
  box-shadow: var(--md-sys-elevation-1);
}

.m3-mermaid-container svg {
  max-width: 100%;
  height: auto;
}

/* Search Modal / Dialog */
.m3-search-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 200;
  align-items: flex-start;
  justify-content: center;
  padding-top: 10vh;
}

.m3-search-modal.open {
  display: flex;
}

.m3-search-backdrop-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--md-sys-color-scrim);
  backdrop-filter: blur(4px);
}

.m3-search-card {
  position: relative;
  width: 90%;
  max-width: 640px;
  background-color: var(--md-sys-color-surface-container-high);
  border-radius: var(--md-sys-shape-corner-extra-large);
  box-shadow: var(--md-sys-elevation-3);
  border: 1px solid var(--md-sys-color-outline-variant);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 75vh;
  z-index: 210;
}

.m3-search-header {
  display: flex;
  align-items: center;
  padding: 14px 18px;
  gap: 12px;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container-highest);
}

.m3-search-input {
  flex: 1;
  background: none;
  border: none;
  font-family: var(--md-sys-typescale-plain-font);
  font-size: 16px;
  color: var(--md-sys-color-on-surface);
  outline: none;
}

.m3-search-input::placeholder {
  color: var(--md-sys-color-on-surface-variant);
}

.m3-search-filter-bar {
  display: flex;
  gap: 8px;
  padding: 8px 16px;
  background-color: var(--md-sys-color-surface-container-high);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  overflow-x: auto;
}

.m3-filter-chip {
  background: transparent;
  border: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface-variant);
  padding: 4px 12px;
  border-radius: var(--md-sys-shape-corner-small);
  font-family: var(--md-sys-typescale-plain-font);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.m3-filter-chip:hover:not(.active) {
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
}

.m3-filter-chip.active {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  border-color: var(--md-sys-color-secondary);
  font-weight: 600;
}

.m3-search-results-list {
  overflow-y: auto;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.m3-search-item {
  display: flex;
  flex-direction: column;
  padding: 10px 14px;
  border-radius: var(--md-sys-shape-corner-medium);
  text-decoration: none;
  color: var(--md-sys-color-on-surface);
  transition: background-color 0.15s ease;
}

.m3-search-item:hover,
.m3-search-item.selected {
  background-color: var(--md-sys-color-surface-container-lowest);
}

.m3-search-item-title {
  font-weight: 600;
  font-size: 15px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--md-sys-color-primary);
}

.m3-search-item-desc {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 2px;
}

.m3-search-footer {
  padding: 10px 16px;
  background-color: var(--md-sys-color-surface-container-lowest);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--md-sys-color-on-surface-variant);
}

.m3-search-keys {
  display: flex;
  gap: 12px;
}

.m3-search-key-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Footer */
.m3-footer {
  background-color: var(--md-sys-color-surface-container-low);
  border-top: 1px solid var(--md-sys-color-outline-variant);
  padding: 32px 24px;
  margin-top: auto;
  color: var(--md-sys-color-on-surface-variant);
  font-size: var(--md-sys-typescale-body-medium-size);
}

.m3-footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
}

.m3-footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
  justify-content: center;
}

.m3-footer-links a {
  color: var(--md-sys-color-primary);
  text-decoration: none;
  font-weight: 500;
}

.m3-footer-links a:hover {
  text-decoration: underline;
}

/* Responsive Breakpoints */
@media (max-width: 860px) {
  .m3-nav-drawer {
    position: fixed;
    top: var(--m3-top-app-bar-height);
    left: 0;
    bottom: 0;
    transform: translateX(-100%);
    box-shadow: var(--md-sys-elevation-3);
  }

  .m3-nav-drawer.open {
    transform: translateX(0);
  }

  .m3-nav-drawer.open + .m3-drawer-backdrop {
    display: block;
  }

  .m3-content-wrapper {
    padding: 24px 16px 48px 16px;
  }

  .m3-top-app-bar-center {
    display: none;
  }

  .m3-mobile-search-btn {
    display: inline-flex !important;
  }
}

@media (min-width: 861px) {
  .m3-mobile-menu-btn {
    display: none;
  }

  .m3-mobile-search-btn {
    display: none;
  }
}

/* Scroll Reading Progress Bar */
.m3-reading-progress {
  position: fixed;
  top: var(--m3-top-app-bar-height);
  left: 0;
  height: 3px;
  background-color: var(--md-sys-color-primary);
  z-index: 99;
  width: 0%;
  transition: width 0.08s linear;
}

/* Article Layout with Sticky Table of Contents */
.m3-article-layout {
  display: flex;
  gap: 36px;
  align-items: flex-start;
  position: relative;
  width: 100%;
}

.m3-article-layout .m3-markdown-body {
  flex: 1;
  min-width: 0;
}

.m3-toc-sidebar {
  display: none;
  width: 240px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--m3-top-app-bar-height) + 24px);
  max-height: calc(100vh - var(--m3-top-app-bar-height) - 48px);
  overflow-y: auto;
}

.m3-toc-card {
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 16px;
}

.m3-toc-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--md-sys-typescale-brand-font);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 12px;
}

.m3-toc-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.m3-toc-item {
  margin: 0;
}

.m3-toc-item-h3 {
  padding-left: 12px;
}

.m3-toc-link {
  display: block;
  padding: 4px 8px;
  border-radius: var(--md-sys-shape-corner-extra-small);
  color: var(--md-sys-color-on-surface-variant);
  text-decoration: none;
  font-size: 13px;
  line-height: 1.4;
  border-left: 2px solid transparent;
  transition: color 0.15s ease, background-color 0.15s ease, border-color 0.15s ease;
}

.m3-toc-link:hover {
  color: var(--md-sys-color-on-surface);
  background-color: var(--md-sys-color-surface-container-high);
}

.m3-toc-link.active {
  color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
  border-left-color: var(--md-sys-color-primary);
  font-weight: 600;
}

/* Mobile Expandable Table of Contents */
.m3-toc-mobile-slot {
  display: block;
  margin-bottom: 24px;
}

.m3-toc-mobile-card {
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: 12px 16px;
}

.m3-toc-mobile-summary {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--md-sys-typescale-brand-font);
  font-size: 14px;
  font-weight: 600;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.m3-toc-mobile-summary::-webkit-details-marker {
  display: none;
}

.m3-toc-expand-icon {
  margin-left: auto;
  transition: transform 0.2s ease;
}

details[open] .m3-toc-expand-icon {
  transform: rotate(180deg);
}

.m3-toc-mobile-card .m3-toc-list {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--md-sys-color-outline-variant);
}

/* Heading Anchor Links */
.m3-heading-anchor-btn {
  background: none;
  border: none;
  cursor: pointer;
  color: var(--md-sys-color-outline);
  opacity: 0;
  margin-left: 8px;
  padding: 2px 4px;
  border-radius: var(--md-sys-shape-corner-extra-small);
  vertical-align: middle;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.15s ease, color 0.15s ease, background-color 0.15s ease;
}

.m3-markdown-body h2:hover .m3-heading-anchor-btn,
.m3-markdown-body h3:hover .m3-heading-anchor-btn {
  opacity: 1;
}

.m3-heading-anchor-btn:hover {
  color: var(--md-sys-color-primary);
  background-color: var(--md-sys-color-surface-container-highest);
}

/* Floating Snackbar Toast */
.m3-snackbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background-color: var(--md-sys-color-inverse-surface);
  color: var(--md-sys-color-inverse-on-surface);
  padding: 10px 20px;
  border-radius: var(--md-sys-shape-corner-full);
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 8px;
  box-shadow: var(--md-sys-elevation-3);
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.25s cubic-bezier(0.2, 0, 0, 1), opacity 0.2s ease;
}

.m3-snackbar.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Wide Viewport Adjustments */
@media (min-width: 1280px) {
  .m3-content-wrapper {
    max-width: 1200px;
  }

  .m3-toc-sidebar {
    display: block;
  }

  .m3-toc-mobile-slot {
    display: none;
  }
}

/* Material Design 3 Diagram Card */
.m3-diagram-card {
  margin: 28px 0;
  background-color: var(--md-sys-color-surface-container-lowest);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-medium);
  box-shadow: var(--md-sys-elevation-1);
  overflow: hidden;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.m3-diagram-card:hover {
  border-color: var(--md-sys-color-outline);
  box-shadow: var(--md-sys-elevation-2);
}

.m3-diagram-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 16px;
  background-color: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-on-surface-variant);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.m3-diagram-header-title {
  display: flex;
  align-items: center;
  gap: 8px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-size: 11px;
}

.m3-diagram-copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: transparent;
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--md-sys-shape-corner-full);
  color: var(--md-sys-color-on-surface-variant);
  font-family: var(--md-sys-typescale-plain-font);
  font-size: 11px;
  font-weight: 500;
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.m3-diagram-copy-btn:hover {
  background-color: var(--md-sys-color-surface-container-highest);
  color: var(--md-sys-color-on-surface);
  border-color: var(--md-sys-color-outline);
}

.m3-diagram-body {
  padding: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow-x: auto;
  background-color: var(--md-sys-color-surface-container-lowest);
}

.m3-diagram-body svg {
  max-width: 100% !important;
  height: auto !important;
  display: block;
}