/* ===================================== */
/* Documentation Hub — Design System     */
/* Vercel/Stripe/Supabase B2B SaaS Style */
/* Updated: improved typography, links,  */
/* accessibility, mobile, dark mode      */
/* ===================================== */

/* ===================================== */
/* Motion Accessibility — WCAG 2.3.3    */
/* ===================================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration:        0.01ms !important;
    animation-iteration-count: 1      !important;
    transition-duration:       0.01ms !important;
    scroll-behavior:           auto   !important;
  }

  /* Chatbot — typing dots: static display */
  .ai-chatbot-typing span {
    animation: none;
    opacity: 0.5;
  }

  /* Chatbot — bubble entrance animation */
  .ai-chatbot-message.is-new .ai-chatbot-bubble {
    animation: none;
    opacity: 1;
    transform: none;
  }

  /* Chatbot — streaming line fade */
  .ai-chatbot-bubble .ai-chatbot-streaming-line {
    animation: none;
  }

  /* Chatbot container open/close */
  .ai-chatbot-container {
    transform:  none !important;
    transition: visibility 0s, opacity 0.01ms !important;
  }

  /* Split-view container */
  .split-view-container {
    transform:  none !important;
    transition: visibility 0s, opacity 0.01ms !important;
  }

  /* Reading progress bar */
  #reading-progress {
    transition: none !important;
  }

  /* Cards */
  .md-typeset .grid.cards > ul > li {
    will-change: auto;
    transition: background 0.01ms, border-color 0.01ms !important;
  }
  .md-typeset .grid.cards > ul > li:hover,
  .md-typeset .grid.cards > ul > li:active {
    transform:  none !important;
    box-shadow: none !important;
  }

  /* FAB buttons */
  .ai-chatbot-fab,
  .split-view-toggle {
    transition: background 0.01ms, opacity 0.01ms !important;
  }
  .ai-chatbot-fab:hover,
  .split-view-toggle:hover {
    transform: none !important;
  }

  /* Buttons */
  .md-typeset .md-button {
    will-change: auto;
    transition: background 0.01ms, border-color 0.01ms, opacity 0.01ms !important;
  }
  .md-typeset .md-button--primary:hover,
  .md-typeset .md-button--primary:active {
    transform:  none !important;
    box-shadow: none !important;
  }
  .md-typeset .md-button.is-loading::after {
    animation: none;
    border: 2px solid currentColor;
    opacity: 0.4;
  }

  /* Shimmer skeleton */
  .ai-chatbot-skeleton-bubble,
  .ai-chatbot-skeleton-bubble::after {
    animation: none;
    background: var(--color-surface-raised);
  }
}

/* ===================================== */
/* Design Tokens                         */
/* ===================================== */
:root {
  /* Primary color: single solid zinc */
  --color-primary: #18181b;        /* zinc-900 */
  --color-primary-hover: #27272a;  /* zinc-800 */
  --color-primary-fg: #ffffff;

  /* Surface layers */
  --color-bg: #ffffff;
  --color-surface: #fafafa;        /* zinc-50 */
  --color-surface-raised: #f4f4f5; /* zinc-100 */

  /* Borders */
  --color-border: #e4e4e7;         /* zinc-200 */
  --color-border-strong: #d4d4d8;  /* zinc-300 */

  /* Text */
  --color-text: #18181b;           /* zinc-900 */
  --color-text-muted: #52525b;     /* zinc-600 — darker for WCAG AA */
  --color-text-subtle: #71717a;    /* zinc-500 */

  /* Accent — links, active states (visible blue) */
  --color-accent: #2563eb;         /* blue-600 — WCAG AA on white */
  --color-accent-hover: #1d4ed8;   /* blue-700 */
  --color-accent-light: #eff6ff;   /* blue-50 */

  /* Shadows — shadow-sm only, no soft glow */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 1px 3px 0 rgba(0, 0, 0, 0.08), 0 1px 2px -1px rgba(0, 0, 0, 0.04);

  /* Radii — rounded-md max */
  --radius-sm: 0.25rem;   /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */

  /* Transitions — updated with physics-based easings */
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-out-expo:  cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out:    cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast:   150ms var(--ease-out-expo);
  --transition-medium: 220ms var(--ease-out-expo);
  --transition-spring: 300ms var(--ease-spring);

  /* Spacing scale (4px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;

  /* Typography scale */
  --text-h1: 2rem;        /* 32px */
  --text-h2: 1.5rem;      /* 24px */
  --text-h3: 1.25rem;     /* 20px */
  --text-h4: 1.0625rem;   /* 17px */
  --text-body: 1rem;      /* 16px */
  --text-sm: 0.875rem;    /* 14px */
  --text-xs: 0.75rem;     /* 12px */

  /* Chatbot icon sizes (unchanged) */
  --chatbot-icon-fab: 20px;
  --chatbot-icon-header: 22px;
  --chatbot-icon-action: 18px;
  --chatbot-icon-avatar: 18px;
  --chatbot-icon-send: 22px;
  --chatbot-icon-welcome: 40px;
}

/* Dark mode: zinc-950 / zinc-900 layers */
[data-md-color-scheme="slate"] {
  --color-primary: #fafafa;        /* near-white on dark */
  --color-primary-hover: #e4e4e7;
  --color-primary-fg: #18181b;

  --color-bg: #09090b;             /* zinc-950 */
  --color-surface: #18181b;        /* zinc-900 */
  --color-surface-raised: #27272a; /* zinc-800 */

  --color-border: #3f3f46;         /* zinc-700 */
  --color-border-strong: #52525b;  /* zinc-600 */

  --color-text: #f4f4f5;           /* zinc-100 — brighter for readability */
  --color-text-muted: #d4d4d8;     /* zinc-300 — much brighter in dark mode */
  --color-text-subtle: #a1a1aa;    /* zinc-400 */

  /* Accent in dark mode — lighter blue for dark backgrounds */
  --color-accent: #60a5fa;         /* blue-400 — WCAG AA on dark bg */
  --color-accent-hover: #93c5fd;   /* blue-300 */
  --color-accent-light: #1e3a5f;   /* dark blue tint */

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px -1px rgba(0, 0, 0, 0.2);

  /* Override MkDocs Material dark variables */
  --md-default-bg-color: #09090b;
  --md-default-fg-color: #f4f4f5;
}

/* Override MkDocs Material primary color to match design tokens */
:root,
[data-md-color-scheme="default"] {
  --md-primary-fg-color: #18181b;
  --md-primary-bg-color: #ffffff;
  --md-accent-fg-color: #2563eb;
}

[data-md-color-scheme="slate"] {
  --md-primary-fg-color: #fafafa;
  --md-primary-bg-color: #09090b;
  --md-accent-fg-color: #60a5fa;
}

/* ===================================== */
/* Buttons — 6-state                     */
/* ===================================== */
.md-typeset .md-button {
  border-radius: var(--radius-md);
  padding: 0.5rem 1rem;
  font-weight: 500;
  font-size: 0.875rem;
  min-height: 36px;
  min-width: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  transition:
    background     var(--transition-fast),
    border-color   var(--transition-fast),
    transform      200ms var(--ease-spring),
    box-shadow     var(--transition-fast),
    opacity        var(--transition-fast);
  will-change: transform;
  text-transform: none;
  letter-spacing: 0;
  box-shadow: none;
  -webkit-tap-highlight-color: transparent;
}

.md-typeset .md-button--primary {
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  color: var(--color-primary-fg);
  box-shadow: none;
}

.md-typeset .md-button--primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  transform: translateY(-1px);
}

.md-typeset .md-button--primary:active:not(:disabled) {
  transform: translateY(0) scale(0.97);
  box-shadow: none;
  transition-duration: 60ms;
}

.md-typeset .md-button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  transform: none;
}

.md-typeset .md-button:disabled,
.md-typeset .md-button[disabled] {
  opacity: 0.38;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
}

.md-typeset .md-button.is-loading {
  color: transparent;
  pointer-events: none;
}

.md-typeset .md-button.is-loading::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: rgba(255,255,255,0.9);
  border-radius: 50%;
  animation: btnSpin 0.65s linear infinite;
  will-change: transform;
}

@keyframes btnSpin {
  to { transform: rotate(360deg); }
}

.md-typeset .md-button:not(.md-button--primary) {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
}

.md-typeset .md-button:not(.md-button--primary):hover:not(:disabled) {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
}

.md-typeset .md-button:not(.md-button--primary):active:not(:disabled) {
  transform: scale(0.97);
  transition-duration: 60ms;
}

/* ===================================== */
/* Code Blocks                           */
/* ===================================== */
.md-typeset pre > code {
  border-radius: var(--radius-lg);
}

.md-typeset code {
  border-radius: var(--radius-sm);
  padding: 0.1em 0.35em;
  font-size: 0.85em;
}

.md-typeset .md-clipboard {
  border-radius: var(--radius-sm);
}

/* ===================================== */
/* Tables                                */
/* ===================================== */
.md-typeset table:not([class]) {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: none;
  border-collapse: separate;
  border-spacing: 0;
  width: 100%;
  margin: var(--space-6) 0;
  display: block;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.md-typeset table:not([class]) th {
  background: var(--color-surface-raised);
  color: var(--color-text);
  font-weight: 600;
  padding: 0.625rem 0.875rem;
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  border-bottom: 1px solid var(--color-border);
}

[data-md-color-scheme="slate"] .md-typeset table:not([class]) th {
  background: var(--color-surface-raised);
}

.md-typeset table:not([class]) td {
  padding: 0.625rem 0.875rem;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.875rem;
}

.md-typeset table:not([class]) tr:last-child td {
  border-bottom: none;
}

.md-typeset table:not([class]) tr:hover td {
  background: var(--color-surface);
}

.md-typeset table:not([class]) td:first-child {
  font-weight: 500;
}

.md-typeset table:not([class]) a {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.25rem;
  max-width: 100%;
  overflow-wrap: anywhere;
}

/* Table icon alignment */
.md-typeset table:not([class]) .twemoji,
.md-typeset table:not([class]) svg {
  vertical-align: middle;
  margin-right: 0.25rem;
}

/* ===================================== */
/* Admonitions                           */
/* ===================================== */
.md-typeset .admonition {
  border-radius: var(--radius-lg);
  box-shadow: none;
  border: 1px solid var(--color-border);
  border-left-width: 3px;
}

.md-typeset .admonition-title {
  font-weight: 600;
  font-size: 0.875rem;
}

.md-typeset details {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
}

/* Admonition type overrides — use border-left color, keep surface bg */
.md-typeset .admonition.tip {
  background: var(--color-bg);
  border-left-color: var(--color-primary);
}

.md-typeset .admonition.success {
  background: var(--color-bg);
}

.md-typeset .admonition.success .admonition-title {
  background: none;
}

[data-md-color-scheme="slate"] .md-typeset .admonition.tip,
[data-md-color-scheme="slate"] .md-typeset .admonition.success {
  background: var(--color-surface);
}

/* ===================================== */
/* Navigation — Tabs                     */
/* ===================================== */

.md-tabs {
  height: auto !important;
  min-height: 2.4rem;
  overflow: visible !important;
}

.md-tabs__list {
  display: flex;
  align-items: center;
  gap: 0.125rem;
  padding: 0.3rem 0.5rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  -webkit-mask-image: linear-gradient(
    to right,
    black calc(100% - 48px),
    transparent 100%
  );
  mask-image: linear-gradient(
    to right,
    black calc(100% - 48px),
    transparent 100%
  );
}

.md-tabs__list::-webkit-scrollbar {
  display: none;
}

.md-tabs__item {
  display: flex;
  align-items: stretch;
  flex-shrink: 0;
}

.md-tabs__link {
  display: flex;
  align-items: center;
  font-weight: 500;
  font-size: 0.8125rem;
  line-height: 1.4;
  opacity: 0.78;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition:
    color      var(--transition-fast),
    opacity    var(--transition-fast),
    background var(--transition-fast);
}

.md-tabs__link:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.1);
}

[data-md-color-scheme="slate"] .md-tabs__link:hover {
  background: rgba(255, 255, 255, 0.08);
}

.md-tabs__link--active {
  font-weight: 600;
  opacity: 1;
  background: rgba(255, 255, 255, 0.15);
}

[data-md-color-scheme="slate"] .md-tabs__link--active {
  background: rgba(255, 255, 255, 0.12);
}

.md-nav__link {
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.md-nav__link:hover {
  color: var(--md-primary-fg-color);
}

.md-nav__item--active > .md-nav__link {
  font-weight: 600;
  color: var(--md-primary-fg-color);
}

/* ===================================== */
/* Accessibility — Focus Indicators      */
/* ===================================== */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.md-nav__link:focus-visible,
.md-tabs__link:focus-visible,
.md-header__button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.md-typeset .md-button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip-to-content link */
.skip-to-content {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  z-index: 200000;
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent);
  color: #ffffff;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: top 0.1s ease;
}

.skip-to-content:focus {
  top: 0;
  outline: 3px solid #ffffff;
  outline-offset: 2px;
}

/* ===================================== */
/* Headings — Stronger hierarchy         */
/* ===================================== */
.md-typeset h1 {
  font-size: var(--text-h1);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-2);
  padding-left: var(--space-3);
  border-left: 3px solid var(--color-primary);
  color: var(--color-text);
  background: none;
  -webkit-background-clip: initial;
  -webkit-text-fill-color: initial;
  background-clip: initial;
}

.md-typeset h2 {
  font-size: var(--text-h2);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 0.35rem;
  margin-top: var(--space-8);
}

.md-typeset h2 .twemoji,
.md-typeset h2 svg,
.md-typeset h2 .emojione {
  margin-right: var(--space-2);
  vertical-align: middle;
  font-size: 1.5rem;
}

.md-typeset h3 {
  font-size: var(--text-h3);
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-text);
  margin-top: var(--space-6);
}

.md-typeset h4 {
  font-size: var(--text-h4);
  font-weight: 600;
  color: var(--color-text-muted);
  margin-top: var(--space-4);
}

.md-typeset h3 .twemoji,
.md-typeset h3 svg {
  margin-right: var(--space-1);
  vertical-align: middle;
}

.md-typeset h2:has(.twemoji),
.md-typeset h2:has(.emojione) {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ===================================== */
/* Horizontal Rule                       */
/* ===================================== */
.md-typeset hr {
  border: none;
  height: 1px;
  background: var(--color-border);
  margin: var(--space-8) 0;
}

/* ===================================== */
/* Typography                            */
/* ===================================== */
.md-typeset {
  font-size: var(--text-body);
  line-height: 1.75;
  color: var(--color-text);
}

.md-content__inner {
  max-width: 780px;
}

/* ===================================== */
/* Links — Visible accent color          */
/* ===================================== */
.md-typeset a:not(.md-button):not(.md-tag):not(.md-nav__link):not(.md-tabs__link) {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 2px;
  transition: color var(--transition-fast), text-decoration-color var(--transition-fast);
}

.md-typeset a:not(.md-button):not(.md-tag):not(.md-nav__link):not(.md-tabs__link):hover {
  color: var(--color-accent-hover);
  text-decoration-color: var(--color-accent-hover);
}

.md-typeset a:not(.md-button):not(.md-tag):not(.md-nav__link):not(.md-tabs__link):focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

/* ===================================== */
/* Tags                                  */
/* ===================================== */
.md-typeset .md-tag {
  border-radius: var(--radius-md);
  padding: 0.2rem 0.5rem;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

/* ===================================== */
/* Search                                */
/* ===================================== */
.md-search__input {
  border-radius: var(--radius-md);
  padding-left: var(--space-4);
}

.md-search__form {
  border-radius: var(--radius-md);
}

/* ===================================== */
/* Mermaid Diagrams                      */
/* ===================================== */
.mermaid {
  text-align: center;
  padding: var(--space-4);
  background: var(--md-code-bg-color);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  margin: var(--space-4) 0;
  overflow-x: auto;
  overflow-y: hidden;
  max-width: 100%;
}

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

/* ===================================== */
/* Footer                                */
/* ===================================== */
.md-footer {
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.md-footer-meta {
  padding: var(--space-4) 0;
}

/* ===================================== */
/* Selection                             */
/* ===================================== */
::selection {
  background: var(--color-primary);
  color: var(--color-primary-fg);
}

/* ===================================== */
/* Link Icons                            */
/* ===================================== */
.md-typeset a .twemoji,
.md-typeset a svg {
  vertical-align: middle;
  margin-right: 0.25rem;
  transition: transform var(--transition-fast);
}

.md-typeset a:hover .twemoji,
.md-typeset a:hover svg {
  transform: translateX(2px);
}

.external-icon {
  display: inline-block;
  margin-left: 0.2em;
  vertical-align: middle;
  opacity: 0.55;
  transition: opacity var(--transition-fast);
}

.md-typeset a:hover .external-icon {
  opacity: 0.8;
}

.external-icon svg {
  width: 0.75em;
  height: 0.75em;
  vertical-align: middle;
}

.md-nav__link--active-scroll {
  color: var(--color-accent) !important;
  font-weight: 600;
}

/* ===================================== */
/* SVG Defensive Sizing                  */
/* ===================================== */
.md-typeset svg {
  max-width: 100%;
  height: auto;
}

.md-typeset .twemoji svg,
.md-typeset .emojione svg,
.md-typeset .lg.middle svg {
  width: 1em;
  height: 1em;
  max-width: 1em;
}

.md-typeset p > svg,
.md-typeset li > svg,
.md-typeset a > svg,
.md-typeset h1 > svg,
.md-typeset h2 > svg,
.md-typeset h3 > svg,
.md-typeset h4 > svg,
.md-typeset h5 > svg,
.md-typeset h6 > svg {
  width: 1em;
  height: 1em;
  max-width: 1em;
  vertical-align: -0.125em;
}

/* ===================================== */
/* Card Large Icons                      */
/* ===================================== */
.md-typeset .grid.cards .lg.middle {
  --card-icon-size: 1.5rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: var(--card-icon-size);
  height: var(--card-icon-size);
  font-size: var(--card-icon-size);
  line-height: 1;
  margin-bottom: var(--space-3);
  color: var(--md-primary-fg-color);
}

.md-typeset .grid.cards .lg.middle svg,
.md-typeset .grid.cards .lg.middle img {
  width: 100%;
  height: 100%;
  fill: currentColor;
}

.md-typeset .grid.cards .lg.middle img {
  object-fit: contain;
}

/* ===================================== */
/* Stats / Kicker Text                   */
/* ===================================== */
.md-typeset > p:has(.twemoji) {
  text-align: center;
  font-size: 0.8125rem;
  color: var(--color-text-subtle);
  padding: 0;
}

/* ===================================== */
/* Docker Compose / Compose Hero         */
/* ===================================== */
.compose-hero {
  margin: var(--space-4) 0 var(--space-6);
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
}

.home-hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at top right, rgba(37, 99, 235, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(244, 244, 245, 0.7), rgba(255, 255, 255, 0.96));
}

[data-md-color-scheme="slate"] .home-hero {
  background:
    radial-gradient(circle at top right, rgba(96, 165, 250, 0.12), transparent 30%),
    linear-gradient(180deg, rgba(39, 39, 42, 0.96), rgba(24, 24, 27, 0.98));
}

.home-hero::after {
  content: '';
  position: absolute;
  inset: auto -4rem -4rem auto;
  width: 12rem;
  height: 12rem;
  border-radius: 999px;
  background: rgba(24, 24, 27, 0.04);
  pointer-events: none;
}

[data-md-color-scheme="slate"] .home-hero::after {
  background: rgba(250, 250, 250, 0.05);
}

.home-hero > * {
  position: relative;
  z-index: 1;
}

.home-stat-list,
.landing-meta-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0.75rem 0 0;
}

.home-stat-list span,
.landing-meta-list span {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.375rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.7);
  color: var(--color-text-muted);
  font-size: 0.75rem;
  font-weight: 600;
}

[data-md-color-scheme="slate"] .home-stat-list span,
[data-md-color-scheme="slate"] .landing-meta-list span {
  background: rgba(39, 39, 42, 0.9);
}

.home-section-grid,
.home-link-grid {
  margin-top: var(--space-2);
}

[data-md-color-scheme="slate"] .compose-hero {
  background: var(--color-surface);
  border-color: var(--color-border);
}

.compose-kicker {
  display: inline-block;
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--color-text-subtle);
  margin-bottom: 0.35rem;
}

.compose-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
  align-items: center;
  font-size: 0;
}

.compose-actions .md-button,
.compose-actions a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  padding: 0.375rem 0.625rem;
  font-size: 0.75rem;
  line-height: 1.25;
  text-decoration: none;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
}

.compose-actions .md-button:not(.md-button--primary),
.compose-actions a:not(.md-button--primary) {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
}

.compose-actions .md-button:not(.md-button--primary):hover,
.compose-actions a:not(.md-button--primary):hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
}

[data-md-color-scheme="slate"] .compose-actions .md-button:not(.md-button--primary) {
  border-color: var(--color-border);
  background: transparent;
}

.compose-actions .md-button--primary,
.compose-actions a.md-button--primary {
  box-shadow: none;
  background: var(--color-primary);
  color: var(--color-primary-fg);
  border: 1px solid var(--color-primary);
}

.compose-actions .md-button--primary:hover,
.compose-actions a.md-button--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* Compose Grid */
.compose-grid {
  margin-top: var(--space-3);
}

.compose-grid > ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 0.75rem;
  list-style: none;
  margin: 0;
  padding-left: 0;
  min-width: 0;
}

.compose-grid > ul > li {
  margin: 0;
  padding: var(--space-4);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  box-shadow: none;
  min-width: 0;
  overflow-wrap: anywhere;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

[data-md-color-scheme="slate"] .compose-grid > ul > li {
  border-color: var(--color-border);
  background: var(--color-surface);
}

.compose-grid > ul > li:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
}

[data-md-color-scheme="slate"] .compose-grid > ul > li:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
}

/* Stack Card */
.compose-grid .stack-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  height: 100%;
  min-width: 0;
}

.stack-card h3 {
  margin-top: 0;
  margin-bottom: 0;
  font-size: 0.9375rem;
  font-weight: 600;
}

.stack-meta {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: 0.8125rem;
  color: var(--color-text-muted);
  margin-top: var(--space-2);
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-2);
  list-style: none;
  padding-left: 0;
  margin-bottom: 0;
}

[data-md-color-scheme="slate"] .stack-meta {
  border-top-color: var(--color-border);
}

.stack-meta li {
  margin: 0;
}

.stack-meta strong {
  color: var(--color-text);
  font-weight: 600;
}

/* Stack Links */
.stack-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin-top: 0.35rem;
  align-items: center;
  font-size: 0;
}

.stack-links[markdown="block"] {
  display: none;
}

.stack-links:not(:has(a)) {
  display: none;
}

.stack-links .md-button,
.stack-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.3rem 0.55rem;
  font-size: 0.71875rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
  line-height: 1.25;
  text-decoration: none;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.stack-links .md-button--primary {
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: var(--color-primary-fg);
  box-shadow: none;
}

.stack-links .md-button:hover,
.stack-links a:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
}

.stack-links .md-button--primary:hover {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
}

/* Stack Note */
.stack-note {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px dashed var(--color-border);
  font-size: 0.78125rem;
  color: var(--color-text-muted);
}

[data-md-color-scheme="slate"] .stack-note {
  border-top-color: var(--color-border);
}

/* ===================================== */
/* Footer Cards                          */
/* ===================================== */
.md-typeset .grid.cards:last-of-type > ul > li {
  padding: var(--space-6);
}

.md-typeset .grid.cards:last-of-type .lg.middle {
  --card-icon-size: 1.5rem;
}

/* ===================================== */
/* CS Reference Controls                 */
/* ===================================== */
.cs-reference-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  align-items: center;
  margin: 0.75rem 0 1.125rem;
  padding: 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--md-code-bg-color);
}

.cs-reference-controls label {
  font-weight: 600;
  margin-right: var(--space-1);
}

.cs-reference-controls select {
  min-width: 210px;
}

.cs-reference-table [data-lang][hidden] {
  display: none !important;
}

/* ===================================== */
/* Smooth Scroll                         */
/* ===================================== */
html {
  scroll-behavior: smooth;
}

/* ===================================== */
/* Responsive                            */
/* ===================================== */
@media screen and (max-width: 76.1875em) {
  .md-typeset h1 {
    font-size: 1.75rem;
  }

  .md-typeset h2 {
    font-size: 1.375rem;
  }

  .md-typeset h3 {
    font-size: 1.125rem;
  }

  .md-typeset .grid.cards > ul {
    grid-template-columns: repeat(2, 1fr);
  }

  .md-typeset .grid.cards .lg.middle {
    --card-icon-size: 1.25rem;
  }
}

@media screen and (min-width: 76.25em) {
  .md-typeset .grid.cards > ul {
    grid-template-columns: repeat(3, 1fr);
  }

  .md-content__inner {
    max-width: 960px;
  }
}

@media screen and (min-width: 90em) {
  .md-typeset .grid.cards > ul {
    grid-template-columns: repeat(4, 1fr);
  }

  .md-content__inner {
    max-width: 1120px;
  }
}

@media screen and (max-width: 44.9375em) {
  .md-typeset h1 {
    font-size: 1.5rem;
    letter-spacing: -0.01em;
  }

  .md-typeset h2 {
    font-size: 1.25rem;
  }

  .md-typeset h3 {
    font-size: 1.0625rem;
  }

  .md-typeset .md-button {
    display: block;
    text-align: center;
    margin-bottom: var(--space-2);
  }

  .md-typeset .grid.cards > ul {
    grid-template-columns: 1fr;
  }

  .md-typeset .grid.cards .lg.middle {
    --card-icon-size: 1rem;
  }

  .md-typeset > p:has(.twemoji) {
    font-size: 0.875rem;
  }

  .md-typeset .admonition {
    margin-left: 0;
    margin-right: 0;
  }

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

  .compose-actions {
    flex-direction: column;
  }

  .compose-actions .md-button,
  .stack-links .md-button {
    width: 100%;
    justify-content: flex-start;
  }

  .home-stat-list,
  .landing-meta-list {
    flex-direction: column;
  }

  .home-stat-list span,
  .landing-meta-list span {
    width: 100%;
    justify-content: center;
  }

  .md-content__inner {
    padding: 0 var(--space-4);
  }

  .md-tabs__list {
    padding: 0.25rem var(--space-2);
  }

  .md-nav__link,
  .md-tabs__link {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .ai-chatbot-fab {
    bottom: calc(16px + env(safe-area-inset-bottom));
    right: calc(16px + env(safe-area-inset-right));
  }
}

@media (max-width: 700px) {
  .cs-reference-controls {
    flex-direction: column;
    align-items: stretch;
  }

  .cs-reference-controls select {
    min-width: 0;
    width: 100%;
  }
}

/* ===================================== */
/* Print                                 */
/* ===================================== */
@media print {
  .md-typeset .grid.cards > ul > li {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid var(--color-border);
  }

  .md-typeset .md-button {
    border: 1px solid var(--color-border);
    background: none;
    color: var(--color-text);
  }
}

/* ===================================== */
/* Reading Progress Bar                  */
/* ===================================== */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  transform: scaleX(0);
  transform-origin: left center;
  background: var(--color-accent);
  z-index: 200000;
  pointer-events: none;
  will-change: transform;
}

/* ===================================== */
/* Card Grid — Enhanced                  */
/* ===================================== */
.md-typeset .grid.cards > ul {
  gap: 0.625rem;
}

.md-typeset .grid.cards > ul > li {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg);
  box-shadow: none;
  transition:
    transform      200ms var(--ease-out-expo),
    box-shadow     200ms var(--ease-out-expo),
    background     var(--transition-fast),
    border-color   var(--transition-fast);
  will-change: transform;
  display: flex;
  flex-direction: column;
  -webkit-tap-highlight-color: transparent;
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > ul > li {
  border-color: var(--color-border);
  background: var(--color-surface);
}

.md-typeset .grid.cards > ul > li:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
  box-shadow: 0 8px 24px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.04);
  transform: translateY(-3px);
}

.md-typeset .grid.cards > ul > li:active {
  transform: translateY(-1px) scale(0.985);
  transition-duration: 80ms;
}

[data-md-color-scheme="slate"] .md-typeset .grid.cards > ul > li:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
  box-shadow: 0 8px 24px rgba(0,0,0,0.35), 0 2px 6px rgba(0,0,0,0.2);
}

.md-typeset .grid.cards .twemoji,
.md-typeset .grid.cards .emojione,
.md-typeset .grid.cards svg {
  fill: var(--md-primary-fg-color);
}

.md-typeset .grid.cards a {
  color: var(--color-accent);
  font-weight: 600;
  transition: color var(--transition-fast);
  text-decoration: none;
}

.md-typeset .grid.cards a:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.md-typeset .grid.cards > ul > li > p {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  line-height: 1.55;
}

.md-typeset .grid.cards > ul > li strong {
  font-size: 1rem;
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-text);
}

/* FAB Button */
.ai-chatbot-fab {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  opacity: 0.7;
  border: 1px solid var(--color-primary);
  cursor: pointer;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    opacity      var(--transition-fast),
    background   var(--transition-fast),
    transform    200ms var(--ease-spring);
  z-index: 100001;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

.ai-chatbot-fab:hover {
  opacity: 1;
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-md);
  transform: scale(1.08);
}

.ai-chatbot-fab:active {
  transform: scale(0.95);
  transition-duration: 80ms;
}

.ai-chatbot-fab svg {
  inline-size: var(--chatbot-icon-fab);
  block-size: var(--chatbot-icon-fab);
  fill: var(--color-primary-fg);
  transition: transform var(--transition-medium);
  flex-shrink: 0;
}

.ai-chatbot-fab.open svg {
  transform: rotate(180deg);
}

/* Chat Container */
.ai-chatbot-container {
  position: fixed;
  bottom: 80px;
  right: 24px;
  width: 400px;
  max-width: calc(100vw - 32px);
  height: 540px;
  max-height: calc(100vh - 140px);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md), 0 4px 24px rgba(0, 0, 0, 0.12);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 100002;
  border: 1px solid var(--color-border);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity var(--transition-medium), transform var(--transition-medium), visibility 0s linear 0.2s;
}

.ai-chatbot-container.open {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  transition-delay: 0s;
}

body:has(.ai-chatbot-container.open) .split-view-toggle {
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
}

body.split-view-active .ai-chatbot-fab,
body.split-view-active .ai-chatbot-container {
  opacity: 0 !important;
  visibility: hidden !important;
  pointer-events: none !important;
}

@keyframes chatbotSlideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Header */
.ai-chatbot-header {
  padding: 14px 16px;
  background: var(--color-primary);
  color: var(--color-primary-fg);
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--color-border);
}

.ai-chatbot-header-icon {
  width: 36px;
  height: 36px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

[data-md-color-scheme="slate"] .ai-chatbot-header-icon {
  background: rgba(255, 255, 255, 0.1);
}

.ai-chatbot-header-icon svg {
  inline-size: var(--chatbot-icon-header);
  block-size: var(--chatbot-icon-header);
  fill: var(--color-primary-fg);
  flex-shrink: 0;
}

.ai-chatbot-header-text {
  flex: 1;
  min-width: 0;
}

.ai-chatbot-header-title {
  font-weight: 600;
  font-size: 0.9375rem;
  margin: 0;
}

.ai-chatbot-header-subtitle {
  font-size: 0.75rem;
  opacity: 0.75;
  margin: 2px 0 0 0;
}

.ai-chatbot-kb-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: rgba(34, 197, 94, 0.2);
  border: 1px solid rgba(134, 239, 172, 0.6);
  color: #d1fae5;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  vertical-align: middle;
}

.ai-chatbot-docs-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-left: 6px;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: rgba(37, 99, 235, 0.16);
  border: 1px solid rgba(96, 165, 250, 0.4);
  color: #dbeafe;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  vertical-align: middle;
}

.ai-chatbot-header-actions {
  display: flex;
  gap: 6px;
}

.ai-chatbot-header-btn {
  background: rgba(255, 255, 255, 0.12);
  border: none;
  border-radius: var(--radius-md);
  padding: 6px;
  cursor: pointer;
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
}

.ai-chatbot-header-btn:hover {
  background: rgba(255, 255, 255, 0.22);
}

.ai-chatbot-header-btn svg {
  inline-size: var(--chatbot-icon-action);
  block-size: var(--chatbot-icon-action);
  fill: var(--color-primary-fg);
  flex-shrink: 0;
}

/* Messages */
.ai-chatbot-messages {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  scroll-behavior: smooth;
}

.ai-chatbot-messages::-webkit-scrollbar {
  width: 5px;
}

.ai-chatbot-messages::-webkit-scrollbar-track {
  background: transparent;
}

.ai-chatbot-messages::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 3px;
}

/* Message Bubbles */
.ai-chatbot-message {
  display: flex;
  gap: 8px;
  max-width: 100%;
}

@keyframes messageIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ai-chatbot-message.is-new .ai-chatbot-bubble {
  animation: bubbleIn 0.22s ease-out;
  transform-origin: top left;
  will-change: transform, opacity;
}

.ai-chatbot-message.user.is-new .ai-chatbot-bubble {
  transform-origin: top right;
}

@keyframes bubbleIn {
  from { opacity: 0; transform: scale(0.98) translateY(4px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.ai-chatbot-message.user {
  flex-direction: row-reverse;
}

.ai-chatbot-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
}

.ai-chatbot-message.user .ai-chatbot-avatar {
  background: var(--color-surface-raised);
  border-color: var(--color-border);
}

.ai-chatbot-message.assistant .ai-chatbot-avatar {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.ai-chatbot-avatar svg {
  inline-size: var(--chatbot-icon-avatar);
  block-size: var(--chatbot-icon-avatar);
  fill: var(--color-primary-fg);
  flex-shrink: 0;
}

.ai-chatbot-message.user .ai-chatbot-avatar svg {
  fill: var(--color-text);
}

.ai-chatbot-bubble {
  max-width: calc(100% - 44px);
  padding: 10px 14px;
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
  line-height: 1.6;
  word-wrap: break-word;
  overflow-wrap: break-word;
  word-break: break-word;
  border: 1px solid var(--color-border);
}

.ai-chatbot-bubble.is-streaming {
  overflow: hidden;
}

.ai-chatbot-bubble .ai-chatbot-streaming-line {
  animation: streamingLineFade 0.18s ease;
}

@keyframes streamingLineFade {
  from { opacity: 0.6; transform: translateY(2px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ai-chatbot-message.user .ai-chatbot-bubble {
  background: var(--color-primary);
  color: var(--color-primary-fg);
  border-color: var(--color-primary);
  border-bottom-right-radius: var(--radius-sm);
}

.ai-chatbot-message.assistant .ai-chatbot-bubble {
  background: var(--color-surface);
  color: var(--color-text);
  border-color: var(--color-border);
  border-bottom-left-radius: var(--radius-sm);
}

.ai-chatbot-context-status,
.ai-chatbot-retrieval-status {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.ai-chatbot-context-status {
  padding: 8px 14px 0;
}

.ai-chatbot-status-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 9px;
  border-radius: 999px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.6875rem;
  font-weight: 600;
}

.ai-chatbot-status-chip.is-complete {
  color: var(--color-text);
}

.ai-chatbot-status-chip.is-error {
  color: #b91c1c;
  border-color: rgba(185, 28, 28, 0.2);
  background: rgba(254, 226, 226, 0.8);
}

/* Markdown in bubble */
.ai-chatbot-bubble p { margin: 0 0 8px 0; }
.ai-chatbot-bubble p:last-child { margin-bottom: 0; }

.ai-chatbot-bubble h1,
.ai-chatbot-bubble h2,
.ai-chatbot-bubble h3 {
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 10px 0 6px 0;
}

.ai-chatbot-bubble h1:first-child,
.ai-chatbot-bubble h2:first-child,
.ai-chatbot-bubble h3:first-child {
  margin-top: 0;
}

.ai-chatbot-bubble pre {
  background: var(--md-code-bg-color, #1e1e1e);
  color: var(--md-code-fg-color, #d4d4d4);
  padding: 10px 12px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin: 8px 0;
  font-size: 0.8125rem;
  max-width: 100%;
  border: 1px solid var(--color-border);
}

.ai-chatbot-bubble code {
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
  font-size: 0.8125rem;
}

.ai-chatbot-bubble :not(pre) > code {
  background: var(--color-surface-raised);
  padding: 1px 5px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  border: 1px solid var(--color-border);
}

.ai-chatbot-message.user .ai-chatbot-bubble :not(pre) > code {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.2);
}

.ai-chatbot-bubble ul,
.ai-chatbot-bubble ol {
  margin: 6px 0;
  padding-left: 18px;
}

.ai-chatbot-bubble li { margin: 3px 0; }

.ai-chatbot-bubble a {
  color: inherit;
  text-decoration: underline;
}

.ai-chatbot-bubble strong { font-weight: 600; }

.ai-chatbot-bubble hr {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 10px 0;
}

/* Typing Indicator */
.ai-chatbot-typing {
  display: flex;
  gap: 4px;
  padding: 5px 8px;
  align-items: center;
}

.ai-chatbot-kb-status {
  font-size: 0.6875rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  padding: 4px 10px;
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

[data-md-color-scheme="slate"] .ai-chatbot-kb-status {
  background: var(--color-surface-raised);
  color: var(--color-text-muted);
}

.ai-chatbot-typing span {
  width: 7px;
  height: 7px;
  background: var(--color-text-muted);
  border-radius: 50%;
  animation: typingBounce 1.4s infinite;
}

.ai-chatbot-typing span:nth-child(2) { animation-delay: 0.2s; }
.ai-chatbot-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes typingBounce {
  0%, 80%, 100% { transform: translateY(0); opacity: 0.4; }
  40% { transform: translateY(-6px); opacity: 1; }
}

/* Input Area */
.ai-chatbot-input-area {
  padding: 12px 14px;
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: 8px;
  background: var(--color-bg);
  flex-shrink: 0;
}

.ai-chatbot-input {
  flex: 1;
  padding: 9px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  outline: none;
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.ai-chatbot-input:focus {
  border-color: var(--color-primary);
  box-shadow: none;
}

.ai-chatbot-input::placeholder {
  color: var(--color-text-subtle);
}

.ai-chatbot-send-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary);
  border: 1px solid var(--color-primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: center;
  transition: background var(--transition-fast), opacity var(--transition-fast);
  flex-shrink: 0;
  box-shadow: none;
}

.ai-chatbot-send-btn:hover:not(:disabled) {
  background: var(--color-primary-hover);
  border-color: var(--color-primary-hover);
  box-shadow: none;
  transform: none;
}

.ai-chatbot-send-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.ai-chatbot-send-btn svg {
  inline-size: var(--chatbot-icon-send);
  block-size: var(--chatbot-icon-send);
  fill: var(--color-primary-fg);
  margin-left: 2px;
  flex-shrink: 0;
}

/* Welcome Screen */
.ai-chatbot-welcome {
  text-align: center;
  padding: 28px 20px;
  color: var(--color-text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
}

.ai-chatbot-welcome-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  background: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: none;
}

.ai-chatbot-welcome-icon svg {
  inline-size: var(--chatbot-icon-welcome);
  block-size: var(--chatbot-icon-welcome);
  fill: var(--color-primary-fg);
}

.ai-chatbot-welcome h3 {
  margin: 0 0 8px 0;
  color: var(--color-text);
  font-size: 1.0625rem;
  font-weight: 600;
}

.ai-chatbot-welcome p {
  margin: 0 0 16px 0;
  font-size: 0.875rem;
  line-height: 1.6;
}

.ai-chatbot-welcome-note {
  margin-top: -8px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--md-primary-fg-color);
}

.ai-chatbot-welcome-note-docs {
  color: var(--color-accent);
}

/* Suggestion chips */
.ai-chatbot-suggestions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  max-width: 300px;
}

.ai-chatbot-suggestion {
  padding: 7px 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.8125rem;
  cursor: pointer;
  transition: background var(--transition-fast), border-color var(--transition-fast);
  color: var(--color-text);
}

.ai-chatbot-suggestion:hover {
  background: var(--color-surface-raised);
  border-color: var(--color-border-strong);
  transform: none;
}

[data-md-color-scheme="slate"] .ai-chatbot-suggestion {
  background: var(--color-surface);
  border-color: var(--color-border);
}

[data-md-color-scheme="slate"] .ai-chatbot-kb-badge {
  background: rgba(34, 197, 94, 0.18);
  border-color: rgba(134, 239, 172, 0.55);
  color: #d1fae5;
}

[data-md-color-scheme="slate"] .ai-chatbot-docs-badge {
  background: rgba(96, 165, 250, 0.16);
  border-color: rgba(96, 165, 250, 0.4);
  color: #dbeafe;
}

[data-md-color-scheme="slate"] .ai-chatbot-status-chip.is-error {
  color: #fecaca;
  border-color: rgba(248, 113, 113, 0.28);
  background: rgba(127, 29, 29, 0.4);
}

/* Mobile */
@media (max-width: 480px) {
  .ai-chatbot-container {
    width: calc(100vw - 16px);
    right: 8px;
    left: 8px;
    bottom: 80px;
    height: calc(100svh - 100px);
    max-height: none;
    border-radius: var(--radius-lg);
  }

  .ai-chatbot-fab {
    width: 44px;
    height: 44px;
    bottom: calc(16px + env(safe-area-inset-bottom));
    right: calc(16px + env(safe-area-inset-right));
  }

  .ai-chatbot-header {
    padding: 12px 14px;
  }

  .ai-chatbot-messages {
    padding: 12px;
  }

  .ai-chatbot-input-area {
    padding: 10px 12px;
  }
}

/* Dark mode specifics */
[data-md-color-scheme="slate"] .ai-chatbot-container {
  background: var(--color-bg);
  border-color: var(--color-border);
}

[data-md-color-scheme="slate"] .ai-chatbot-message.assistant .ai-chatbot-bubble {
  background: var(--color-surface-raised);
  border-color: var(--color-border);
}

[data-md-color-scheme="slate"] .ai-chatbot-bubble :not(pre) > code {
  background: var(--color-surface-raised);
  border-color: var(--color-border);
}

[data-md-color-scheme="slate"] .ai-chatbot-input-area {
  background: var(--color-bg);
}

/* ===================================== */
/* Chatbot Shimmer Skeleton (M1)         */
/* ===================================== */
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position:  200% center; }
}

.ai-chatbot-skeleton-bubble {
  min-height: 80px;
  border-radius: var(--radius-lg);
  background: linear-gradient(
    90deg,
    var(--color-surface-raised) 25%,
    var(--color-border)         50%,
    var(--color-surface-raised) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border: 1px solid var(--color-border);
}

.ai-chatbot-skeleton-bubble::after {
  content: '';
  display: block;
  width: 60%;
  height: 0.875rem;
  margin-top: 10px;
  border-radius: var(--radius-sm);
  background: linear-gradient(
    90deg,
    var(--color-surface-raised) 25%,
    var(--color-border)         50%,
    var(--color-surface-raised) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  animation-delay: 0.15s;
}

[data-md-color-scheme="slate"] .ai-chatbot-skeleton-bubble {
  background: linear-gradient(
    90deg,
    var(--color-surface-raised) 25%,
    var(--color-border-strong)  50%,
    var(--color-surface-raised) 75%
  );
  background-size: 200% 100%;
}

[data-md-color-scheme="slate"] .ai-chatbot-skeleton-bubble::after {
  background: linear-gradient(
    90deg,
    var(--color-surface-raised) 25%,
    var(--color-border-strong)  50%,
    var(--color-surface-raised) 75%
  );
  background-size: 200% 100%;
}