/* ==========================================================================
   WhiteLotusAI — Documentation Design System
   Tokens matched 1:1 to frontend/src/app/globals.css
   Light:  --surface-page #f4f6f9 · accent #6366f1
   Dark:   --surface-page #0f1117 · accent #818cf8
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Typography — Inter body (matches frontend default), JetBrains Mono code
   -------------------------------------------------------------------------- */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  --md-text-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --md-code-font: "JetBrains Mono", SFMono-Regular, Consolas, monospace;
}

/* --------------------------------------------------------------------------
   2. Light theme — matches frontend :root tokens exactly
   -------------------------------------------------------------------------- */

:root,
[data-md-color-scheme="default"] {
  color-scheme: light;

  /* Page & surface backgrounds */
  --md-default-bg-color:          #f4f6f9;   /* --surface-page */
  --md-default-bg-color--light:   #ffffff;   /* --surface-card */
  --md-default-bg-color--lighter: #f0f2f8;   /* --surface-chat */
  --md-default-bg-color--lightest:#e5e7eb;   /* --border */

  /* Text */
  --md-default-fg-color:           #111827;  /* --text-primary */
  --md-default-fg-color--light:    #6b7280;  /* --text-secondary */
  --md-default-fg-color--lighter:  #9ca3af;  /* --text-muted */
  --md-default-fg-color--lightest: #d1d5db;  /* --text-placeholder */

  /* Primary = header/tabs background (white sidebar matches frontend) */
  --md-primary-fg-color:       #6366f1;      /* --accent */
  --md-primary-fg-color--light:#818cf8;      /* --accent dark variant */
  --md-primary-fg-color--dark: #4f46e5;      /* accent darkened */
  --md-primary-bg-color:       #ffffff;
  --md-primary-bg-color--light:#ffffff;

  /* Accent = links, highlights, active states */
  --md-accent-fg-color:             #6366f1; /* --accent */
  --md-accent-fg-color--transparent: rgba(99, 102, 241, 0.08); /* --surface-active */

  /* Component tokens */
  --wl-page-bg:      #f4f6f9;
  --wl-card-bg:      #ffffff;
  --wl-card-border:  #e5e7eb;               /* --border */
  --wl-card-shadow:  0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04); /* --shadow-card */
  --wl-glow-color:   rgba(99, 102, 241, 0.20); /* --accent-glow */

  --wl-button-primary-bg:     #6366f1;
  --wl-button-primary-text:   #ffffff;
  --wl-button-outline-text:   #6366f1;
  --wl-button-outline-border: rgba(99, 102, 241, 0.50); /* --border-focus */
  --wl-button-hover-bg:       #4f46e5;
  --wl-focus-ring:            rgba(99, 102, 241, 0.50);

  --wl-table-head-bg:     #e0e7ff;           /* --avatar-bg */
  --wl-table-head-text:   #111827;
  --wl-table-head-border: #c7d2fe;           /* --avatar-border */
  --wl-table-row-bg:      #ffffff;
  --wl-table-row-alt-bg:  #f5f6ff;           /* --bubble-ai-bg */
  --wl-table-row-hover-bg:rgba(99, 102, 241, 0.06);

  --wl-header-text:       #ffffff;
  --wl-header-link-hover: #e0e7ff;
}

/* --------------------------------------------------------------------------
   3. Dark theme — matches frontend html.dark tokens exactly
   -------------------------------------------------------------------------- */

[data-md-color-scheme="slate"] {
  color-scheme: dark;

  /* Page & surface backgrounds */
  --md-default-bg-color:          #0f1117;   /* --surface-page */
  --md-default-bg-color--light:   #161b27;   /* --surface-sidebar */
  --md-default-bg-color--lighter: #1e2433;   /* --surface-card */
  --md-default-bg-color--lightest:#252d40;

  /* Text */
  --md-default-fg-color:           rgba(255,255,255,0.92); /* --text-primary */
  --md-default-fg-color--light:    rgba(255,255,255,0.55); /* --text-secondary */
  --md-default-fg-color--lighter:  rgba(255,255,255,0.30); /* --text-muted */
  --md-default-fg-color--lightest: rgba(255,255,255,0.20); /* --text-placeholder */

  /* Primary = header/tabs background */
  --md-primary-fg-color:       #161b27;      /* --surface-sidebar (dark header) */
  --md-primary-fg-color--light:#1e2433;      /* --surface-card */
  --md-primary-fg-color--dark: #0f1117;      /* --surface-page */
  --md-primary-bg-color:       rgba(255,255,255,0.92);
  --md-primary-bg-color--light:rgba(255,255,255,0.55);

  /* Accent */
  --md-accent-fg-color:              #818cf8; /* --accent dark */
  --md-accent-fg-color--transparent: rgba(99, 102, 241, 0.12); /* --surface-active dark */

  /* Component tokens */
  --wl-page-bg:     #0f1117;
  --wl-card-bg:     #1e2433;
  --wl-card-border: rgba(255,255,255,0.08);  /* --border dark */
  --wl-card-shadow: 0 1px 3px rgba(0,0,0,0.30), 0 1px 2px rgba(0,0,0,0.20); /* --shadow-card dark */
  --wl-glow-color:  rgba(99, 102, 241, 0.25); /* --accent-glow dark */

  --wl-button-primary-bg:     #818cf8;
  --wl-button-primary-text:   #0f1117;
  --wl-button-outline-text:   #a5b4fc;       /* --accent-text dark */
  --wl-button-outline-border: rgba(99, 102, 241, 0.50);
  --wl-button-hover-bg:       #6366f1;
  --wl-focus-ring:            rgba(99, 102, 241, 0.50);

  --wl-table-head-bg:     rgba(99, 102, 241, 0.15); /* --nav-active-bg dark */
  --wl-table-head-text:   rgba(255,255,255,0.92);
  --wl-table-head-border: rgba(255,255,255,0.14);   /* --border-hover dark */
  --wl-table-row-bg:      #1e2433;
  --wl-table-row-alt-bg:  #161b27;
  --wl-table-row-hover-bg:rgba(99, 102, 241, 0.08);

  --wl-header-text:       rgba(255,255,255,0.92);
  --wl-header-link-hover: #a5b4fc;           /* --accent-text dark */
}

/* --------------------------------------------------------------------------
   4. Full-width layout and table of contents
   -------------------------------------------------------------------------- */

.md-grid {
  width: 85%;
  max-width: none !important;
}

.md-main__inner {
  width: 85%;
  max-width: none !important;
}

/* Hide the right-hand "On this page" sidebar. */
.md-sidebar--secondary {
  display: none !important;
}

.md-content {
  width: 85%;
  min-width: 0;
  max-width: none !important;
  flex-grow: 1;
}

.md-content__inner {
  width: 85%;
  max-width: none !important;
  margin-right: 0 !important;
  margin-left: 0 !important;
  padding-right: clamp(1rem, 2.5vw, 2.5rem);
  padding-left: clamp(1rem, 2.5vw, 2.5rem);
  box-sizing: border-box;
}

.md-content img,
.md-content video,
.md-content iframe,
.md-content svg,
.md-content .mermaid {
  max-width: 85%;
}

/* --------------------------------------------------------------------------
   5. Header and navigation
   -------------------------------------------------------------------------- */

.md-header {
  background-color: var(--md-primary-fg-color) !important;
  color: var(--wl-header-text);
  border-bottom: 1px solid var(--wl-card-border);
  box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.18);
}

.md-tabs {
  background-color: var(--md-primary-fg-color) !important;
  border-bottom: 1px solid var(--wl-card-border);
}

.md-header__button,
.md-header__topic,
.md-header__title,
.md-tabs__link {
  color: var(--wl-header-text) !important;
}

.md-header__button:hover,
.md-tabs__link:hover,
.md-tabs__link--active {
  color: var(--wl-header-link-hover) !important;
  opacity: 1;
}

.md-tabs__link {
  font-weight: 500;
  opacity: 0.88;
  transition: opacity 0.2s ease, color 0.2s ease;
}

/* --------------------------------------------------------------------------
   6. Typography and headings
   -------------------------------------------------------------------------- */

.md-typeset {
  color: var(--md-default-fg-color);
  line-height: 1.75;
}

.md-typeset h1,
.md-typeset h2,
.md-typeset h3,
.md-typeset h4 {
  color: var(--md-default-fg-color);
  scroll-margin-top: 5rem;
}

.md-typeset h1 {
  margin-bottom: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.035em;
}

.md-typeset h2 {
  margin-top: 2.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid var(--wl-card-border);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.md-typeset h3 {
  font-weight: 600;
  letter-spacing: -0.01em;
}

.md-typeset h1:hover .headerlink,
.md-typeset h2:hover .headerlink,
.md-typeset h3:hover .headerlink {
  color: var(--md-accent-fg-color);
}

/* --------------------------------------------------------------------------
   7. Homepage buttons
   -------------------------------------------------------------------------- */

.md-typeset a.md-button,
.md-typeset a.md-button:visited {
  display: inline-block;
  max-width: 100%;
  padding: 0.65em 1.15em;
  border: 1px solid var(--wl-button-outline-border) !important;
  border-radius: 8px;
  background-color: transparent !important;
  color: var(--wl-button-outline-text) !important;
  font-weight: 600;
  line-height: 1.5;
  text-align: center;
  text-decoration: none !important;
  white-space: normal;
  overflow-wrap: anywhere;
  box-shadow: none;
  transition:
    background-color 0.2s ease,
    color 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.md-typeset a.md-button--primary,
.md-typeset a.md-button--primary:visited {
  background-color: var(--wl-button-primary-bg) !important;
  border-color: var(--wl-button-primary-bg) !important;
  color: var(--wl-button-primary-text) !important;
}

.md-typeset a.md-button:hover,
.md-typeset a.md-button:focus-visible {
  background-color: var(--wl-button-hover-bg) !important;
  border-color: var(--wl-button-hover-bg) !important;
  color: #ffffff !important;
  box-shadow: 0 5px 16px var(--wl-glow-color);
}

.md-typeset a.md-button:hover {
  transform: translateY(-1px);
}

.md-typeset a.md-button:focus-visible,
.md-typeset :focus-visible {
  outline: 3px solid var(--wl-focus-ring);
  outline-offset: 3px;
}

.md-typeset a.md-button:active {
  transform: translateY(0);
  box-shadow: none;
}

/* --------------------------------------------------------------------------
   8. Admonitions and expandable details
   -------------------------------------------------------------------------- */

.md-typeset .admonition,
.md-typeset details {
  border-top: 0;
  border-right: 1px solid var(--wl-card-border);
  border-bottom: 1px solid var(--wl-card-border);
  border-left-width: 4px;
  border-radius: 10px;
  box-shadow: var(--wl-card-shadow);
  transition: box-shadow 0.2s ease;
}

.md-typeset .admonition:hover,
.md-typeset details:hover {
  box-shadow: 0 12px 30px -10px var(--wl-glow-color);
}

.md-typeset .admonition-title,
.md-typeset summary {
  font-weight: 600;
  border-top-left-radius: 8px;
  border-top-right-radius: 8px;
}

/* --------------------------------------------------------------------------
   9. Code blocks and inline code
   -------------------------------------------------------------------------- */

.md-typeset pre {
  max-width: 100%;
  overflow: auto;
  border: 1px solid var(--wl-card-border);
  border-radius: 10px;
  box-shadow: var(--wl-card-shadow);
}

.md-typeset pre > code {
  border: 0;
  border-radius: 0;
  font-family: var(--md-code-font);
  font-size: 0.85em;
  line-height: 1.65;
  box-shadow: none;
}

.md-typeset code {
  border-radius: 5px;
  padding: 0.12em 0.35em;
  font-family: var(--md-code-font);
  overflow-wrap: anywhere;
}

.md-clipboard {
  transition: color 0.2s ease, transform 0.15s ease;
}

.md-clipboard:hover {
  color: var(--md-accent-fg-color);
  transform: scale(1.08);
}

/* --------------------------------------------------------------------------
   10. Tables
   -------------------------------------------------------------------------- */

.md-typeset table:not([class]) {
  display: table;
  width: 100%;
  max-width: 100%;
  border: 1px solid var(--wl-card-border);
  border-collapse: separate;
  border-spacing: 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--wl-card-shadow);
}

.md-typeset table:not([class]) thead th {
  padding: 0.85rem 1rem;
  background-color: var(--wl-table-head-bg) !important;
  color: var(--wl-table-head-text) !important;
  border-bottom: 2px solid var(--wl-table-head-border);
  font-weight: 700;
  text-align: left;
  letter-spacing: 0.01em;
  vertical-align: middle;
}

.md-typeset table:not([class]) th,
.md-typeset table:not([class]) td {
  border-color: var(--wl-card-border);
}

.md-typeset table:not([class]) tbody td {
  padding: 0.75rem 1rem;
  background-color: var(--wl-table-row-bg);
  color: var(--md-default-fg-color);
  border-bottom: 1px solid var(--wl-card-border);
  vertical-align: top;
}

.md-typeset table:not([class]) tbody tr:nth-child(even) td {
  background-color: var(--wl-table-row-alt-bg);
}

.md-typeset table:not([class]) tbody tr:hover td {
  background-color: var(--wl-table-row-hover-bg) !important;
}

.md-typeset table:not([class]) tbody tr:last-child td {
  border-bottom: 0;
}

/* --------------------------------------------------------------------------
   11. Links
   -------------------------------------------------------------------------- */

.md-typeset a:not(.md-button) {
  text-underline-offset: 0.18em;
  text-decoration-thickness: 1px;
}

.md-typeset a:not(.md-button):hover {
  color: var(--md-accent-fg-color);
}

/* --------------------------------------------------------------------------
   12. Scrollbar — matches frontend (4px thin style)
   -------------------------------------------------------------------------- */

::-webkit-scrollbar {
  width: 4px;
  height: 4px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: rgba(99, 102, 241, 0.20);
  border-radius: 9999px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--md-accent-fg-color);
}

/* --------------------------------------------------------------------------
   13. Responsive refinements and reduced motion
   -------------------------------------------------------------------------- */

@media screen and (max-width: 600px) {
  .md-content__inner {
    padding-right: 1rem;
    padding-left: 1rem;
  }

  .md-typeset a.md-button {
    max-width: 100%;
    white-space: normal;
  }

  .md-typeset table:not([class]) {
    display: block;
    overflow-x: auto;
  }

  .md-typeset table:not([class]) thead th,
  .md-typeset table:not([class]) tbody td {
    min-width: 120px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .md-tabs__link,
  .md-typeset .admonition,
  .md-typeset details,
  .md-typeset a.md-button,
  .md-clipboard {
    transition: none !important;
  }

  .md-typeset a.md-button:hover,
  .md-clipboard:hover {
    transform: none;
  }
}

/* ==========================================================================
   WhiteLotusAI — Related Documentation Cards
   ========================================================================== */

.wl-doc-cards {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.25rem;
  margin: 1.75rem 0;
  align-items: stretch;
}

.wl-doc-card {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 1.5rem 1.4rem;
  border: 1px solid var(--wl-card-border);
  border-radius: 1rem;
  background-color: var(--wl-card-bg);
  color: var(--md-default-fg-color);
  box-shadow: var(--wl-card-shadow);
  transition:
    border-color 180ms ease,
    box-shadow 180ms ease,
    transform 180ms ease;
}

.wl-doc-card:hover {
  border-color: var(--md-accent-fg-color);
  box-shadow: 0 0 0 1px var(--md-accent-fg-color), 0 8px 32px var(--wl-glow-color);
  transform: translateY(-2px);
}

.wl-doc-card__icon {
  display: block;
  font-size: 1.8rem;
  line-height: 1.4;
  margin-bottom: 1.1rem;
  color: var(--md-accent-fg-color);
  transition: transform 180ms ease;
}

.wl-doc-card:hover .wl-doc-card__icon {
  transform: translateY(-2px);
}

.wl-doc-card__title {
  display: block;
  margin: 0 0 0.85rem;
  font-size: 1rem;
  font-weight: 650;
  line-height: 1.5;
  color: var(--md-default-fg-color);
}

.wl-doc-card__description {
  margin: 0 0 1.25rem;
  line-height: 1.65;
  color: var(--md-default-fg-color--light);
}

.wl-doc-card__link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  width: 100%;
  margin-top: auto;
  padding-top: 0.25rem;
  font-weight: 500;
  line-height: 1.6;
  text-decoration: none;
  color: var(--md-accent-fg-color);
}

.wl-doc-card__link:hover {
  text-decoration: underline;
}

.wl-doc-card__link span {
  flex-shrink: 0;
  margin-left: auto;
}

@media screen and (max-width: 1100px) {
  .wl-doc-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media screen and (max-width: 600px) {
  .wl-doc-cards {
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
    margin: 1.25rem 0;
  }

  .wl-doc-card {
    padding: 1.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .wl-doc-card,
  .wl-doc-card__icon {
    transition: none;
  }

  .wl-doc-card:hover,
  .wl-doc-card:hover .wl-doc-card__icon {
    transform: none;
  }
}

/* ==========================================================================
   Coding standards principle cards
   ========================================================================== */

.coding-principles-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.coding-principle-card {
  min-width: 0;
  padding: 1.25rem;
  border: 1px solid var(--wl-card-border);
  border-radius: 0.75rem;
  background: var(--wl-card-bg);
  box-shadow: var(--wl-card-shadow);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.coding-principle-card:hover {
  border-color: var(--md-accent-fg-color);
  transform: translateY(-2px);
}

.coding-principle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-bottom: 0.5rem;
  border-radius: 0.6rem;
  background: rgba(99, 102, 241, 0.10);
  color: var(--md-accent-fg-color);
  font-size: 1.4rem;
  font-weight: 700;
}

.coding-principle-card h3 {
  margin: 0.25rem 0 0.5rem;
  font-size: 1rem;
}

.coding-principle-card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.65;
}

@media screen and (max-width: 600px) {
  .coding-principles-grid {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .coding-principle-card {
    transition: none;
  }

  .coding-principle-card:hover {
    transform: none;
  }
}