/* ═══════════════════════════════════════════════════════════════
   SLR AI Guide - Custom Styles
   Modern Learning Platform Design
   ═══════════════════════════════════════════════════════════════ */

/* ── CSS Variables ───────────────────────────────────────────── */
:root {
  --content-max-width: 768px;
  /* GitBook-style font stack */
  --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: hsl(var(--p));
  --color-primary-content: hsl(var(--pc));

  /* Semantic colors for prose (light mode) */
  --prose-border: #e1e4e8;
  --prose-bg-subtle: #f6f8fa;
  --prose-code-text: #24292f;
  --prose-link: #3b82f6;
  --prose-bullet: #6b7280;
  --prose-th-text: #2c3e50;
  --prose-hint-strong: #3b82f6;
}

[data-theme="dark"] {
  --prose-border: hsl(var(--bc) / 0.15);
  --prose-bg-subtle: hsl(var(--b2));
  --prose-code-text: #c9d1d9;
  --prose-link: #60a5fa;
  --prose-bullet: #9ca3af;
  --prose-th-text: #c9d1d9;
  --prose-hint-strong: #60a5fa;
}

/* ── 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: hsl(var(--bc));
  font-weight: 400;
  letter-spacing: -0.003em;
}

[data-theme="dark"] .prose {
  color: hsl(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: hsl(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: hsl(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: hsl(var(--b1));
  border: 1px solid var(--prose-border);
  color: hsl(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: hsl(var(--p));
  color: hsl(var(--pc));
  border-color: hsl(var(--p));
}

/* ── Blockquotes (GitBook Hint/Callout Style) ────────────────── */
.prose blockquote {
  position: relative;
  border-left: 4px solid hsl(var(--p));
  background: hsl(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: hsl(var(--bc));
}

[data-theme="dark"] .prose blockquote {
  background: hsl(var(--n) / 0.4);
  color: hsl(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 hsl(var(--bc) / 0.1);
}

.prose figure {
  margin: 1.5em 0;
}

.prose figcaption {
  text-align: center;
  font-size: 0.875rem;
  color: hsl(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: hsl(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: hsl(var(--b2));
  color: hsl(var(--bc));
}

.toc-nav a.active {
  background: hsl(var(--p) / 0.1);
  color: hsl(var(--p));
  border-left-color: hsl(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: hsl(var(--bc) / 0.2) transparent;
}

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

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

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

.scrollbar-thin::-webkit-scrollbar-thumb:hover {
  background: hsl(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: hsl(var(--su) / 0.08);
  border-color: hsl(var(--su));
}

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

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

.callout.danger {
  background: hsl(var(--er) / 0.08);
  border-color: hsl(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: hsl(var(--p) / 0.15);
  color: hsl(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: hsl(var(--bc) / 0.8);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.sidebar-section-header:hover {
  background: hsl(var(--b2));
  color: hsl(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: hsl(var(--p) / 0.25);
  color: inherit;
}

/* ── Focus Styles ───��────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid hsl(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: hsl(var(--n));
  color: hsl(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, hsl(var(--p) / 0.05) 0%, hsl(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 hsl(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: hsl(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: hsl(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;
  }
}