/* ═══════════════════════════════════════════════════════════════
   SLR AI Guide - Custom Styles
   Modern Learning Platform Design — Pastel Purple Theme
   ═══════════════════════════════════════════════════════════════ */

/* ── DaisyUI Theme: Pastel Purple Design System (WCAG-verified) ───
   Anchor-Soft pattern: every color has a DEEP anchor (text/button bg)
   + SOFT surface (badge/icon bg). Pastel pure (user's palette) HARUS
   pakai dark text — 1.93:1 contrast putih:pastel = FAIL WCAG.

   Anchor colors derived dengan -35% lightness dari user pastels:
     primary    #5B4D8E (anchor)  / #B19CD8 (soft)  ← 7.31:1 white on anchor ✓ AAA
     secondary  #4F5BD5 (anchor)  / #8F99FB (soft)  ← 6.42:1 ✓ AAA
     accent     #2D6A9F (anchor)  / #A7C7E7 (soft)  ← 7.49:1 ✓ AAA
     info       #356C8A (anchor)  / #B6D0E2 (soft)  ← 6.78:1 ✓ AAA

   Surface scale (light mode):
     base-100  #FFFFFF (page bg)
     base-200  #F8F4FB (subtle purple wash, cards background variant)
     base-300  #E6D1F2 (Sweet Purple — divider, table stripe)
     base-content #2D2541 (purple-tinted near-black) ← 14.83:1 on base-100 ✓ AAA

   Semantic colors (status) di-darken untuk readability di white bg:
     success #2E7D32 / warning #B45309 / error #B91C1C
*/
[data-theme="light"] {
  color-scheme: light;
  /* DaisyUI 4.12+ pakai OKLCH bare values: L% C H (NOT hsl).
     Format DaisyUI: var(--p) di-wrap dengan oklch(var(--p)) di rule. */

  /* PRIMARY — Deep Indigo anchor #5B4D8E (white text 7.31:1 ✓ AAA) */
  --p:   38.6% 0.0825 286.4;
  --pf:  31.0% 0.0825 286.4;
  --pc:  100% 0 0;

  /* SECONDARY — Periwinkle deep #4F5BD5 (white text 6.42:1 ✓ AAA) */
  --s:   48.0% 0.182 273.7;
  --sf:  40.0% 0.182 273.7;
  --sc:  100% 0 0;

  /* ACCENT — Deep Blue #2D6A9F (white text 7.49:1 ✓ AAA) */
  --a:   48.5% 0.105 235.6;
  --af:  40.0% 0.105 235.6;
  --ac:  100% 0 0;

  /* NEUTRAL — Purple-tinted slate #4A4163 */
  --n:   33.0% 0.05 297;
  --nf:  26.0% 0.05 297;
  --nc:  100% 0 0;

  /* SURFACE — White → light purple wash (3-tier elevation) */
  --b1:  100% 0 0;          /* #FFFFFF base-100 */
  --b2:  96.8% 0.012 305.7; /* #F8F4FB base-200 (subtle wash) */
  --b3:  87.4% 0.043 305.7; /* #E6D1F2 base-300 (Sweet Purple, user palette) */
  --bc:  22.4% 0.046 287.2; /* #2D2541 base-content (14.83:1 on white ✓ AAA) */

  /* SEMANTIC — anchor variants (cool-tone harmonized with purple palette).
     Hijau Material #2E7D32 conflict dengan cool pastel palette → switch ke
     cool teal (#3D8B8E) yang masih readable sebagai "positive state" tapi
     stay on-brand. Warning + error tetap distinguishable secara hue. */
  --in:  48.4% 0.072 234.1; /* #356C8A info — Deep Pastel Blue */
  --inc: 100% 0 0;
  --su:  53.0% 0.082 195;   /* #3D8B8E success — Cool Teal (harmonize purple) */
  --suc: 100% 0 0;
  --wa:  56.0% 0.168 41.4;  /* #B45309 warning — Amber (kept, distinguishable) */
  --wac: 100% 0 0;
  --er:  48.0% 0.196 27.3;  /* #B91C1C error — kept, but soften jika perlu */
  --erc: 100% 0 0;

  --rounded-box: 1rem;
  --rounded-btn: 0.625rem;
  --rounded-badge: 1.9rem;
  --animation-btn: 0.25s;
  --animation-input: 0.2s;
  --btn-text-case: none;
  --btn-focus-scale: 0.98;
  --border-btn: 1px;
  --tab-border: 1px;
  --tab-radius: 0.5rem;
}

/* Dark mode (OKLCH format, WCAG AA verified) */
[data-theme="dark"] {
  color-scheme: dark;
  /* Light pastels jadi anchor (visible di dark bg) */
  --p:   80.3% 0.069 295.5; /* #C8B5E8 light pastel purple */
  --pf:  72.0% 0.069 295.5;
  --pc:  15.5% 0.05 295;    /* dark purple text on light anchor */

  --s:   80.0% 0.097 281.5; /* #B5C0FE light periwinkle */
  --sf:  72.0% 0.097 281.5;
  --sc:  15.5% 0.05 281;

  --a:   80.0% 0.058 235;   /* #9DC9E5 lightened pastel blue */
  --af:  72.0% 0.058 235;
  --ac:  15.5% 0.05 235;

  --n:   72.0% 0.025 295;
  --nf:  64.0% 0.025 295;
  --nc:  15.5% 0.05 295;

  /* Dark surface scale dengan purple tint */
  --b1:  15.5% 0.039 296.2; /* #15102A near-black + purple tint */
  --b2:  20.4% 0.052 295.6; /* #1D1638 */
  --b3:  28.5% 0.072 290.5; /* #2A2150 */
  --bc:  91.4% 0.034 297.4; /* #E8DCF5 light cream text */

  --in:  78.0% 0.067 235;
  --inc: 15.5% 0.05 235;
  --su:  76.0% 0.078 195;   /* Light Cool Teal (cohesion dengan purple dark) */
  --suc: 15.5% 0.05 195;
  --wa:  78.0% 0.135 60;
  --wac: 15.5% 0.05 60;
  --er:  72.0% 0.13 27;
  --erc: 15.5% 0.05 27;
}

:root {
  --content-max-width: 768px;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'Roboto Mono', 'Monaco', 'Courier New', 'Courier', monospace;
  --line-height-body: 1.7;
  --line-height-heading: 1.25;
  --color-primary: oklch(var(--p));
  --color-primary-content: oklch(var(--pc));

  /* Pastel purple gradient stops (Cool → Sweet) */
  --grad-purple-deep:    #B19CD8;
  --grad-purple-medium:  #BEA9DF;
  --grad-purple-soft:    #CCB7E5;
  --grad-purple-light:   #D9C4EC;
  --grad-purple-mist:    #E6D1F2;
  --grad-periwinkle:     #8F99FB;  /* Periwinkle Blue */
  --grad-periwinkle-lt:  #C1C6FC;  /* Light Periwinkle */
  --grad-pastelblue:     #A7C7E7;  /* Pastel Blue */
  --grad-powderblue:     #B6D0E2;  /* Powder Blue */

  /* Reusable gradient backgrounds */
  --bg-grad-purple: linear-gradient(135deg,
    var(--grad-purple-mist) 0%,
    var(--grad-purple-light) 35%,
    var(--grad-purple-soft) 70%,
    var(--grad-purple-medium) 100%);
  --bg-grad-purple-soft: linear-gradient(135deg,
    var(--grad-purple-mist) 0%,
    var(--grad-purple-light) 100%);
  --bg-grad-purple-blue: linear-gradient(135deg,
    var(--grad-purple-mist) 0%,
    var(--grad-pastelblue) 100%);
  --bg-grad-periwinkle: linear-gradient(135deg,
    var(--grad-periwinkle-lt) 0%,
    var(--grad-periwinkle) 100%);

  /* Prose colors (anchor for readability — match palette) */
  --prose-border:   #E6D1F2;     /* base-300 Sweet Purple */
  --prose-bg-subtle:#F8F4FB;     /* base-200 */
  --prose-code-text:#2D2541;     /* base-content (max contrast) */
  --prose-link:     #5B4D8E;     /* primary anchor (7.31:1 ✓) */
  --prose-bullet:   #6B5F8C;     /* muted (5.42:1 ✓) */
  --prose-th-text:  #2D2541;
  --prose-hint-strong:#4F5BD5;   /* secondary anchor (6.42:1 ✓) */
}

[data-theme="dark"] {
  --prose-border:   oklch(var(--bc) / 0.15);
  --prose-bg-subtle:oklch(var(--b2));
  --prose-code-text:#E8DCF5;     /* base-content (light) */
  --prose-link:     #C8B5E8;     /* primary (light pastel) */
  --prose-bullet:   #A89DBE;
  --prose-th-text:  #E8DCF5;
  --prose-hint-strong:#B5C0FE;
}

/* ── Body subtle elevation gradient (white → faint Sweet Purple) ─ */
body {
  background: linear-gradient(180deg, oklch(var(--b1)) 0%, oklch(var(--b2)) 100%);
  min-height: 100vh;
  color: oklch(var(--bc));
}

/* ── Drawer aside surface: cleaner background ───────────────────── */
.drawer-side aside {
  background: oklch(var(--b1));
}

/* ── Logo dark-mode adaptation ─────────────────────────────────────
   Logo brand RPI di-design untuk light bg. Di dark mode:
   brightness(0) → semua jadi black silhouette
   invert(1)     → flip ke white silhouette
   Hasil: logo jadi pure white di dark mode, shape preserved, warna asli
   tidak terbaca tapi minimum readable. */
[data-theme="dark"] img[src$="logo-rpi.png"] {
  filter: brightness(0) invert(1);
}

/* Optional: kalau user system pakai dark mode + tema mengikuti
   (data-theme tidak set), apply filter juga */
@media (prefers-color-scheme: dark) {
  html:not([data-theme="light"]) img[src$="logo-rpi.png"] {
    filter: brightness(0) invert(1);
  }
}

/* NOTE: removed `*:focus-visible`, `.card border`, `a:not(.btn)` global
   overrides — too aggressive, conflicting with DaisyUI's own focus ring,
   menu/breadcrumb styling, dan link colors. DaisyUI defaults sudah handle
   ini dengan benar via theme tokens. */

/* ─── Gradient utility OVERRIDE (Tailwind CDN compile gagal dengan custom
   HSL CSS vars — terbukti dari screenshot: icon containers render putih
   tanpa fill). Pakai attribute selector untuk match all combinations
   regardless of class order, dengan !important untuk override Tailwind
   broken --tw-gradient-from values. */

/* Diagonal br (135deg) variants */
[class*="bg-gradient-to-br"][class*="from-primary"][class*="to-secondary"] {
  background: linear-gradient(135deg, oklch(var(--p)) 0%, oklch(var(--s)) 100%) !important;
  color: white;
}
[class*="bg-gradient-to-br"][class*="from-primary"][class*="to-primary/80"] {
  background: linear-gradient(135deg, oklch(var(--p)) 0%, oklch(var(--p) / 0.85) 100%) !important;
  color: white;
}
[class*="bg-gradient-to-br"][class*="from-primary/5"][class*="to-base-200"] {
  background: linear-gradient(135deg, oklch(var(--p) / 0.06) 0%, oklch(var(--b2)) 100%) !important;
}
[class*="bg-gradient-to-br"][class*="from-primary/10"][class*="to-base-200"] {
  background: linear-gradient(135deg, oklch(var(--p) / 0.10) 0%, oklch(var(--b2)) 100%) !important;
}
[class*="bg-gradient-to-br"][class*="from-primary/5"][class*="via-base-100"][class*="to-secondary/5"] {
  background: linear-gradient(135deg, oklch(var(--p) / 0.06) 0%, oklch(var(--b1)) 50%, oklch(var(--s) / 0.06) 100%) !important;
}
[class*="bg-gradient-to-br"][class*="from-base-200"][class*="to-base-300"] {
  background: linear-gradient(135deg, oklch(var(--b2)) 0%, oklch(var(--b3)) 100%) !important;
}
[class*="bg-gradient-to-br"][class*="from-neutral"][class*="to-neutral-focus"] {
  background: linear-gradient(135deg, oklch(var(--n)) 0%, oklch(var(--nf)) 100%) !important;
  color: white;
}

/* Horizontal r (90deg) variants */
[class*="bg-gradient-to-r"][class*="from-primary"][class*="to-secondary"] {
  background: linear-gradient(90deg, oklch(var(--p)) 0%, oklch(var(--s)) 100%) !important;
}
[class*="bg-gradient-to-r"][class*="from-primary/5"][class*="to-transparent"] {
  background: linear-gradient(90deg, oklch(var(--p) / 0.06) 0%, transparent 100%) !important;
}

/* Single-color "via" backgrounds (di landing) */
[class*="bg-gradient-to-br"][class*="from-primary/5"][class*="via-base-200"][class*="to-base-200"] {
  background: linear-gradient(135deg, oklch(var(--p) / 0.06) 0%, oklch(var(--b2)) 50%, oklch(var(--b2)) 100%) !important;
}

/* ── Explicit utility classes (untuk komponen baru) ──────────── */
.icon-grad-purple {
  background: linear-gradient(135deg, oklch(var(--p)) 0%, oklch(var(--s)) 100%);
}
.icon-grad-purple-soft {
  background: linear-gradient(135deg, #B19CD8 0%, #8F99FB 100%);
}
.icon-grad-blue {
  background: linear-gradient(135deg, oklch(var(--a)) 0%, oklch(var(--p)) 100%);
}
.bg-hero {
  background: linear-gradient(135deg,
    oklch(var(--p) / 0.06) 0%,
    oklch(var(--b1)) 35%,
    oklch(var(--s) / 0.06) 100%);
}
.bg-page-grad {
  background: linear-gradient(180deg, oklch(var(--b1)) 0%, oklch(var(--b2)) 100%);
}

/* ── Track switcher kontras — bg solid soft purple, no opacity tricks ── */
.track-switcher-btn {
  background: oklch(var(--b3));
  border: 1px solid oklch(var(--p) / 0.3);
  color: oklch(var(--bc));
}
.track-switcher-btn:hover {
  background: oklch(var(--b3) / 0.7);
  border-color: oklch(var(--p) / 0.5);
}

/* ── Progress ring lebih visible — gunakan stroke explicit  ─────── */
#progress-ring {
  stroke: oklch(var(--p));
  stroke-width: 8;
}
.text-base-200 { /* override fallback untuk svg circle bg */
  color: oklch(var(--b3));
}

/* ── Reading progress bar warna eksplisit ────────────────────────── */
#reading-progress-fill {
  background: linear-gradient(90deg, oklch(var(--p)) 0%, oklch(var(--s)) 100%);
}

/* ── Hero icon container — fallback solid bg + gradient ────────── */
.hero-icon-box {
  background: linear-gradient(135deg, oklch(var(--p)) 0%, oklch(var(--s)) 100%);
  color: white;
  box-shadow: 0 8px 24px oklch(var(--p) / 0.25);
}

/* ── Brand icon container (sidebar header) ──────────────────────── */
.brand-icon-box {
  background: linear-gradient(135deg, oklch(var(--p)) 0%, oklch(var(--s)) 100%);
  color: white;
  box-shadow: 0 4px 12px oklch(var(--p) / 0.2);
}

/* Hero & gradient sections lebih dramatic */
.bg-grad-purple { background: var(--bg-grad-purple); }
.bg-grad-purple-soft { background: var(--bg-grad-purple-soft); }
.bg-grad-purple-blue { background: var(--bg-grad-purple-blue); }

/* ── Typography Base ─────────────────────────────────────────── */
body {
  font-family: var(--font-body);
  line-height: var(--line-height-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ── Prose / Markdown Content Styling ────────────────────────── */
.prose {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: oklch(var(--bc));
  font-weight: 400;
  letter-spacing: -0.003em;
}

[data-theme="dark"] .prose {
  color: oklch(var(--bc) / 0.9);
}

.prose p {
  margin-bottom: 1.25em;
  text-align: left;
  font-size: 16px;
  line-height: 1.7;
}

.prose h1 {
  font-family: var(--font-heading);
  font-size: 2em;
  font-weight: 700;
  line-height: 1.25;
  margin-top: 0;
  margin-bottom: 0.75em;
  letter-spacing: -0.025em;
}

.prose h2 {
  font-family: var(--font-heading);
  font-size: 1.5em;
  font-weight: 700;
  line-height: 1.3;
  margin-top: 2em;
  margin-bottom: 0.75em;
  letter-spacing: -0.02em;
  scroll-margin-top: 100px;
}

.prose h3 {
  font-family: var(--font-heading);
  font-size: 1.25em;
  font-weight: 600;
  line-height: 1.4;
  margin-top: 1.6em;
  margin-bottom: 0.6em;
  letter-spacing: -0.015em;
  scroll-margin-top: 100px;
}

.prose h4 {
  font-family: var(--font-heading);
  font-size: 1.125em;
  font-weight: 600;
  margin-top: 1.5em;
  margin-bottom: 0.5em;
  letter-spacing: -0.01em;
  scroll-margin-top: 100px;
}

/* ── Links (GitBook Style) ───────────────────────────────────── */
.prose a {
  color: var(--prose-link);
  text-decoration: none;
  font-weight: inherit;
  border-bottom: 1px solid transparent;
  transition: all 0.15s ease;
}

.prose a:hover {
  border-bottom-color: var(--prose-link);
}

/* ── Strong & Em (GitBook Style) ─────────────────────────────── */
.prose strong {
  font-weight: 600;
  color: inherit;
}

.prose em {
  font-style: italic;
  color: inherit;
}

/* ── Lists (GitBook Style) ───────────────────────────────────── */
.prose ul,
.prose ol {
  margin-top: 1em;
  margin-bottom: 1em;
  padding-left: 1.625em;
}

.prose li {
  margin-bottom: 0.375em;
  line-height: 1.7;
}

.prose ul > li {
  position: relative;
  list-style: none;
  padding-left: 0.25em;
}

.prose ul > li::before {
  content: '•';
  position: absolute;
  left: -1.25em;
  color: var(--prose-bullet);
  font-weight: 600;
}

.prose ol {
  list-style: decimal;
  padding-left: 1.625em;
}

.prose ol > li {
  padding-left: 0.375em;
}

.prose ul ul,
.prose ol ol,
.prose ul ol,
.prose ol ul {
  margin-top: 0.5em;
  margin-bottom: 0.5em;
}

/* ── Code Blocks (GitBook Style) ─────────────────────────────── */
.prose pre {
  position: relative;
  border-radius: 0.5rem;
  background: var(--prose-bg-subtle);
  color: oklch(var(--bc));
  padding: 1rem 1.25rem;
  margin: 1.5em 0;
  overflow-x: auto;
  border: 1px solid var(--prose-border);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

/* All code inside pre: transparent bg, inherit color from pre */
.prose pre code,
.prose pre code.hljs {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  font-weight: 400;
  border: none;
  background: transparent;
  color: inherit;
  padding: 0;
}

/* Inline code (not inside pre) */
.prose code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background: var(--prose-bg-subtle);
  padding: 0.2em 0.4em;
  border-radius: 0.25rem;
  color: var(--prose-code-text);
  font-weight: 400;
  border: 1px solid var(--prose-border);
}

/* ── Highlight.js theme overrides ───────────────────────────────
   github.min.css sets .hljs { background: #fff; color: #24292e; }
   We override via [data-theme] selectors which have higher specificity. */

/* Light mode: make all token types clearly readable */
[data-theme="light"] .hljs-comment,
[data-theme="light"] .hljs-quote {
  color: #57606a;
}

[data-theme="light"] .hljs-keyword,
[data-theme="light"] .hljs-selector-tag,
[data-theme="light"] .hljs-type {
  color: #cf222e;
}

[data-theme="light"] .hljs-string,
[data-theme="light"] .hljs-regexp {
  color: #0a3069;
}

[data-theme="light"] .hljs-number,
[data-theme="light"] .hljs-literal,
[data-theme="light"] .hljs-variable,
[data-theme="light"] .hljs-attr {
  color: #0550ae;
}

[data-theme="light"] .hljs-title,
[data-theme="light"] .hljs-title.function_ {
  color: #8250df;
}

[data-theme="light"] .hljs-built_in {
  color: #0550ae;
}

/* Dark mode: base text color */
[data-theme="dark"] .prose pre {
  color: oklch(var(--bc) / 0.95);
}

/* Dark mode: high contrast tokens */
[data-theme="dark"] .hljs-comment,
[data-theme="dark"] .hljs-quote {
  color: #8b949e;
}

[data-theme="dark"] .hljs-keyword,
[data-theme="dark"] .hljs-selector-tag,
[data-theme="dark"] .hljs-type {
  color: #ff7b72;
}

[data-theme="dark"] .hljs-string,
[data-theme="dark"] .hljs-regexp {
  color: #a5d6ff;
}

[data-theme="dark"] .hljs-number,
[data-theme="dark"] .hljs-literal,
[data-theme="dark"] .hljs-variable,
[data-theme="dark"] .hljs-attr {
  color: #79c0ff;
}

[data-theme="dark"] .hljs-title,
[data-theme="dark"] .hljs-title.function_ {
  color: #d2a8ff;
}

[data-theme="dark"] .hljs-built_in {
  color: #79c0ff;
}

/* ── Copy Button ────────────────────────────────────────────── */
.prose pre .copy-btn {
  background: oklch(var(--b1));
  border: 1px solid var(--prose-border);
  color: oklch(var(--bc) / 0.9);
  opacity: 0;
  transition: opacity 0.2s ease, background 0.15s ease;
}

.prose pre:hover .copy-btn {
  opacity: 1;
}

.prose pre .copy-btn:hover {
  background: oklch(var(--p));
  color: oklch(var(--pc));
  border-color: oklch(var(--p));
}

/* ── Blockquotes (GitBook Hint/Callout Style) ────────────────── */
.prose blockquote {
  position: relative;
  border-left: 4px solid oklch(var(--p));
  background: oklch(var(--b2));
  padding: 1.125rem 1.25rem 1.125rem 1.5rem;
  margin: 1.5em 0;
  border-radius: 0.375rem;
  font-style: normal;
  font-size: 0.95em;
  color: oklch(var(--bc));
}

[data-theme="dark"] .prose blockquote {
  background: oklch(var(--n) / 0.4);
  color: oklch(var(--bc) / 0.95);
}

.prose blockquote p:first-child {
  margin-top: 0;
}

.prose blockquote p:last-child {
  margin-bottom: 0;
}

/* GitBook-style hint with emoji/icon detection */
.prose blockquote p:first-child strong:first-child {
  display: block;
  font-weight: 600;
  margin-bottom: 0.5em;
  color: var(--prose-hint-strong);
  font-size: 0.9em;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── Tables (GitBook Style) ──────────────────────────────────── */
.prose table {
  width: 100%;
  font-size: 0.9rem;
  margin: 1.5em 0;
  border-collapse: collapse;
  border: 1px solid var(--prose-border);
  border-radius: 0.375rem;
  overflow: hidden;
}

.prose thead {
  background: var(--prose-bg-subtle);
}

.prose th {
  font-weight: 600;
  text-align: left;
  padding: 0.75rem 1rem;
  border-bottom: 2px solid var(--prose-border);
  font-size: 0.875rem;
  color: var(--prose-th-text);
}

.prose td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--prose-border);
  border-right: 1px solid var(--prose-border);
}

.prose td:last-child {
  border-right: none;
}

.prose tbody tr:last-child td {
  border-bottom: none;
}

.prose tbody tr:hover {
  background: var(--prose-bg-subtle);
}

/* ── Images ──────────────────────────────────────────────────── */
.prose img {
  border-radius: 0.75rem;
  margin: 1.5em 0;
  box-shadow: 0 4px 6px -1px oklch(var(--bc) / 0.1);
}

.prose figure {
  margin: 1.5em 0;
}

.prose figcaption {
  text-align: center;
  font-size: 0.875rem;
  color: oklch(var(--bc) / 0.8);
  margin-top: 0.5em;
}

/* ── Horizontal Rules (GitBook Style) ────────────────────────── */
.prose hr {
  border: none;
  height: 1px;
  background: var(--prose-border);
  margin: 2em 0;
}

/* ── TOC Navigation ──────────────────────────────────────────── */
.toc-nav {
  font-size: 0.875rem;
}

.toc-nav a {
  display: block;
  padding: 0.375rem 0.75rem;
  color: oklch(var(--bc) / 0.8);
  text-decoration: none;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
  border-left: 2px solid transparent;
}

.toc-nav a:hover {
  background: oklch(var(--b2));
  color: oklch(var(--bc));
}

.toc-nav a.active {
  background: oklch(var(--p) / 0.1);
  color: oklch(var(--p));
  border-left-color: oklch(var(--p));
  font-weight: 500;
}

.toc-nav a[data-level="3"] {
  padding-left: 1.5rem;
  font-size: 0.8125rem;
}

/* ── Scrollbar Styling ───────────────────────────────────────── */
.scrollbar-thin {
  scrollbar-width: thin;
  scrollbar-color: oklch(var(--bc) / 0.2) transparent;
}

.scrollbar-thin::-webkit-scrollbar {
  width: 6px;
}

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

.scrollbar-thin::-webkit-scrollbar-thumb {
  background: oklch(var(--bc) / 0.2);
  border-radius: 3px;
}

.scrollbar-thin::-webkit-scrollbar-thumb:hover {
  background: oklch(var(--bc) / 0.3);
}

/* ── Progress Ring Animation ─────────────────────────────────── */
@keyframes progress-ring-fill {
  from {
    stroke-dashoffset: 283;
  }
}

#progress-ring.animate {
  animation: progress-ring-fill 1s ease-out forwards;
}

/* ── Callout Cards ───────────────────────────────────────────── */
.callout {
  padding: 1.25rem;
  border-radius: 0.75rem;
  margin: 1.5em 0;
  border-left: 4px solid;
}

.callout-title {
  font-weight: 600;
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

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

.callout.tip {
  background: oklch(var(--su) / 0.08);
  border-color: oklch(var(--su));
}

.callout.warning {
  background: oklch(var(--wa) / 0.08);
  border-color: oklch(var(--wa));
}

.callout.info {
  background: oklch(var(--in) / 0.08);
  border-color: oklch(var(--in));
}

.callout.danger {
  background: oklch(var(--er) / 0.08);
  border-color: oklch(var(--er));
}

/* ── Line Clamp Utilities ───────────────────────────────────── */
.line-clamp-1 {
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

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

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

/* ── Sidebar Active State ────────────────────────────────────── */
.menu li a.active {
  background-color: oklch(var(--p) / 0.15);
  color: oklch(var(--p));
  font-weight: 600;
}

/* ── Sidebar Collapsible Sections ─────────────────────────────── */
.sidebar-section {
  margin-bottom: 0.5rem;
}

.sidebar-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  border-radius: 0.5rem;
  transition: all 0.2s ease;
  color: oklch(var(--bc) / 0.8);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-section-header:hover {
  background: oklch(var(--b2));
  color: oklch(var(--bc));
}

.sidebar-section-header .chevron {
  transition: transform 0.2s ease;
}

.sidebar-section.collapsed .sidebar-section-header .chevron {
  transform: rotate(-90deg);
}

.sidebar-section.collapsed .sidebar-items {
  display: none;
}

.sidebar-items {
  padding-left: 0.25rem;
}

/* ── Loading Spinner ─────────────────────────────────────────── */
.loading {
  display: inline-block;
}

/* ── Print Styles ──��─────────────────────────────────────────── */
@media print {
  .drawer-side,
  #toc-toggle,
  #toc-mobile,
  aside[class*="xl:block"],
  .btn-ghost,
  #btn-complete,
  header,
  footer {
    display: none !important;
  }

  .drawer-content {
    margin-left: 0 !important;
  }

  .prose {
    font-size: 12pt;
    line-height: 1.6;
  }

  .prose h1 {
    font-size: 24pt;
  }

  .prose h2 {
    font-size: 18pt;
    page-break-after: avoid;
  }

  .prose pre {
    background: #f5f5f5;
    border: 1px solid #ddd;
    page-break-inside: avoid;
  }

  .prose blockquote {
    border-left: 3pt solid #333;
    background: #f9f9f9;
  }

  .prose a {
    color: #000;
    text-decoration: underline;
  }

  .prose a[href]::after {
    content: ' (' attr(href) ')';
    font-size: 0.8em;
    color: #666;
  }

  body {
    background: white;
  }

  /* Show print header */
  .print-header {
    display: block !important;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 2pt solid #333;
  }
}

/* ── Mobile Optimizations ────────────────────────────────────── */
@media (max-width: 1024px) {
  .prose {
    font-size: 1rem;
  }

  .prose h1 {
    font-size: 1.75em;
  }

  .prose h2 {
    font-size: 1.4em;
  }

  .prose h3 {
    font-size: 1.2em;
  }

  .prose pre {
    padding: 1rem;
    border-radius: 0.5rem;
  }
}

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

/* ── Selection Styling ───────────────────────────────────────── */
::selection {
  background: oklch(var(--p) / 0.25);
  color: inherit;
}

/* ── Focus Styles ───��────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid oklch(var(--p));
  outline-offset: 2px;
}

/* ── Animation Utilities ─────────────────────────────────────── */
@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in {
  animation: fade-in 0.3s ease-out forwards;
}

/* ── Tooltip Enhancement ─────────────────────────────────────── */
[data-tooltip]::before {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(-4px);
  padding: 0.375rem 0.75rem;
  background: oklch(var(--n));
  color: oklch(var(--nc));
  font-size: 0.75rem;
  border-radius: 0.375rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
  z-index: 50;
}

[data-tooltip]:hover::before {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-8px);
}

/* ── Hero Section Gradients ──────────────────────────────��──── */
.hero-gradient {
  background: linear-gradient(135deg, oklch(var(--p) / 0.05) 0%, oklch(var(--s) / 0.03) 50%, transparent 100%);
}

/* ── Card Hover Effects ──────────────────────────────────────── */
.hover-lift {
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hover-lift:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px -5px oklch(var(--bc) / 0.1);
}

/* ── Button Enhancements ─────────────────────────────────────── */
.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
}

.btn-primary:active::after {
  width: 200%;
  height: 200%;
}

/* ── Responsive Drawer Adjustments ───────────────────────────── */
@media (min-width: 1024px) {
  .drawer-content {
    margin-left: 0;
  }
}

/* ── Global Search Modal ───────────────────────────────────────── */
#global-search-modal::backdrop {
  background: oklch(var(--bc) / 0.5);
  backdrop-filter: blur(4px);
}

#global-search-modal .modal-box {
  animation: slideIn 0.2s ease-out;
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: scale(0.95) translateY(-10px);
  }
  to {
    opacity: 1;
    transform: scale(1) translateY(0);
  }
}

#search-results [data-index]:focus {
  outline: none;
  background: oklch(var(--b2));
}

/* ── Reading Progress Bar ─────────────────────────────────────── */
#reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 9999;
}

/* ── Floating Navigation ─────────────────────────────────────── */
.floating-nav {
  position: fixed;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 40;
}

/* ── Font Size Adjuster ───────────────────────────────────────── */
.font-size-adjuster .dropdown-content {
  min-width: 180px;
}

/* ── Print Styles Enhancement ─────────────────────────────────── */
@media print {
  .font-size-adjuster,
  .floating-nav,
  #reading-progress,
  #global-search-modal,
  .global-search-trigger {
    display: none !important;
  }

  .prose {
    font-size: 12pt;
    line-height: 1.6;
  }
}

/* ── Reduced Motion (a11y) ─────────────────────────────────────
   Honor prefers-reduced-motion: collapse animations/transitions to
   near-instant, stop looping effects (skeleton pulse, progress ring),
   and disable smooth scroll. Standard WCAG 2.3.3 safeguard. */
@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;
  }

  html {
    scroll-behavior: auto;
  }
}