/* TuiMon — GitHub Pages Dark Theme */
:root {
  --bg-primary: #09090b;
  --bg-secondary: #18181b;
  --bg-tertiary: #27272a;
  --text-primary: #fafafa;
  --text-secondary: #a1a1aa;
  --text-muted: #71717a;
  --border-color: #27272a;
  --border-hover: #3f3f46;
  --accent-cyan: #22d3ee;
  --accent-purple: #a855f7;
  --accent-blue: #3b82f6;
  --accent-green: #22c55e;
  --accent-amber: #f59e0b;
  --accent-pink: #ec4899;
  --gradient-start: #06b6d4;
  --gradient-end: #8b5cf6;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
}

body {
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  line-height: 1.7;
  font-size: 16px;
}

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ===================== */
/* Header                */
/* ===================== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(9, 9, 11, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

header nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

header nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.brand-title {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-version {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-weight: 500;
}

header nav ul:last-child a,
header nav ul:last-child a:visited {
  color: var(--text-secondary) !important;
  text-decoration: none !important;
  font-weight: 500;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  transition: all 0.2s ease;
  -webkit-text-fill-color: var(--text-secondary);
}

header nav ul:last-child a:hover {
  color: var(--text-primary) !important;
  -webkit-text-fill-color: var(--text-primary);
  background: var(--bg-tertiary);
}

/* Mobile Menu */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 110;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: -280px;
  width: 280px;
  height: 100vh;
  background: var(--bg-secondary);
  border-right: 1px solid var(--border-color);
  padding: 5rem 1.5rem 2rem;
  z-index: 105;
  overflow-y: auto;
  transition: left 0.3s ease;
}

.mobile-menu.active { left: 0; }

.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 104;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-menu-overlay.active { opacity: 1; }

.mobile-toc a {
  display: block;
  padding: 0.5rem 0;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.9rem;
  border-left: 2px solid transparent;
  padding-left: 1rem;
  transition: all 0.2s ease;
}

.mobile-toc a:hover { color: var(--text-secondary); }
.mobile-toc a.active {
  color: var(--accent-cyan);
  border-left-color: var(--accent-cyan);
}

/* ===================== */
/* Hero                  */
/* ===================== */
.hero {
  position: relative;
  padding: 10rem 0 4rem;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 800px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(6, 182, 212, 0.12) 0%, rgba(139, 92, 246, 0.08) 40%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-block;
  padding: 0.35rem 1rem;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(139, 92, 246, 0.15));
  border: 1px solid rgba(6, 182, 212, 0.3);
  border-radius: 100px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--accent-cyan);
  margin-bottom: 1.5rem;
  letter-spacing: 0.02em;
}

.hero h1 {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 1.5rem;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 1.5rem;
  line-height: 1.7;
}

.hero-install {
  display: inline-block;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 0.75rem 1.75rem;
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 1rem;
  color: var(--accent-cyan);
  margin-bottom: 2rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.hero-install:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.hero-install .dollar { color: var(--text-muted); margin-right: 0.5rem; }
.hero-install .copy-hint {
  color: var(--text-muted);
  font-size: 0.75rem;
  margin-left: 1rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  border-radius: 10px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  font-family: inherit;
}

.btn-primary {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(6, 182, 212, 0.25);
}

.btn-secondary {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--border-hover);
  background: var(--bg-tertiary);
  transform: translateY(-2px);
}

/* Hero Banner */
.hero-banner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.hero-banner img {
  width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid var(--border-color);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* ===================== */
/* Main Layout           */
/* ===================== */
.main-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 3rem;
  padding-top: 2rem;
  padding-bottom: 4rem;
  align-items: start;
}

#sidebar {
  position: sticky;
  top: 6rem;
  max-height: calc(100vh - 8rem);
  overflow-y: auto;
  padding-right: 1.5rem;
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 4px; }

.toc-header {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

#toc a {
  display: block;
  padding: 0.4rem 0;
  padding-left: 1rem;
  text-decoration: none;
  color: var(--text-muted);
  border-left: 2px solid transparent;
  font-size: 0.875rem;
  line-height: 1.5;
  transition: all 0.2s ease;
}

#toc a:hover {
  color: var(--text-secondary);
  border-left-color: var(--border-hover);
}

#toc a.active {
  color: var(--accent-cyan);
  border-left-color: var(--accent-cyan);
  background: linear-gradient(90deg, rgba(34, 211, 238, 0.1), transparent);
}

/* ===================== */
/* Content               */
/* ===================== */
#content {
  max-width: 100%;
  overflow-x: hidden;
}

#content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-top: 4rem;
  margin-bottom: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-primary);
}

#content section:first-child h2 {
  border-top: none;
  margin-top: 0;
  padding-top: 0;
}

/* Section divider accent colors */
#content section:nth-of-type(6n+1) h2 { border-top-color: var(--accent-cyan); }
#content section:nth-of-type(6n+2) h2 { border-top-color: var(--accent-purple); }
#content section:nth-of-type(6n+3) h2 { border-top-color: var(--accent-blue); }
#content section:nth-of-type(6n+4) h2 { border-top-color: var(--accent-green); }
#content section:nth-of-type(6n+5) h2 { border-top-color: var(--accent-amber); }
#content section:nth-of-type(6n+6) h2 { border-top-color: var(--accent-pink); }

#content h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

#content p {
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
}

#content strong { color: var(--text-primary); font-weight: 600; }

#content a {
  color: var(--accent-cyan);
  text-decoration: none;
  transition: color 0.2s ease;
}

#content a:hover {
  color: var(--accent-purple);
  text-decoration: underline;
}

#content ul, #content ol {
  color: var(--text-secondary);
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

#content li { margin-bottom: 0.5rem; }

/* Inline Code */
:not(pre) > code {
  padding: 0.2rem 0.5rem;
  border-radius: 6px;
  background: var(--bg-tertiary);
  color: var(--accent-cyan);
  font-size: 0.875em;
  border: 1px solid var(--border-color);
}

/* Code Blocks */
pre[class*="language-"] {
  background: var(--bg-secondary) !important;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  margin: 1.5rem 0;
  padding: 1.25rem !important;
  font-size: 0.875rem;
  overflow-x: auto;
}

pre[class*="language-"]::-webkit-scrollbar { height: 6px; }
pre[class*="language-"]::-webkit-scrollbar-track { background: var(--bg-tertiary); border-radius: 3px; }
pre[class*="language-"]::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 3px; }

pre[class*="language-"] code { line-height: 1.6; }

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  padding: 4px 10px;
  font-size: 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
}

.copy-btn:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
}

/* ===================== */
/* Feature Grid          */
/* ===================== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 2rem;
}

.feature-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  padding: 1.75rem;
  transition: all 0.25s ease;
}

.feature-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 1rem 0 0.5rem;
  color: var(--text-primary);
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.6;
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.icon-cyan { background: rgba(34, 211, 238, 0.12); }
.icon-purple { background: rgba(168, 85, 247, 0.12); }
.icon-green { background: rgba(34, 197, 94, 0.12); }
.icon-blue { background: rgba(59, 130, 246, 0.12); }
.icon-amber { background: rgba(245, 158, 11, 0.12); }
.icon-pink { background: rgba(236, 72, 153, 0.12); }

/* ===================== */
/* Steps                 */
/* ===================== */
.step {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2.5rem;
  align-items: flex-start;
}

.step-number {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
  font-weight: 700;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 0.25rem;
}

.step-content { flex: 1; min-width: 0; }
.step-content h3 { margin-top: 0; margin-bottom: 0.75rem; }

/* ===================== */
/* Screenshot Showcase   */
/* ===================== */
.screenshot {
  margin: 1.5rem 0;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.screenshot img {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-caption {
  background: var(--bg-secondary);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
}

/* Screenshot Grid */
.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(480px, 1fr));
  gap: 1.5rem;
  margin-top: 1.5rem;
}

/* ===================== */
/* Tables                */
/* ===================== */
.compat-table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}

.compat-table th,
.compat-table td {
  padding: 0.75rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}

.compat-table th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.compat-table td { color: var(--text-secondary); }
.compat-table td:first-child { color: var(--text-primary); font-weight: 500; }

.status-badge {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

.status-supported {
  background: rgba(34, 197, 94, 0.15);
  color: var(--accent-green);
  border: 1px solid rgba(34, 197, 94, 0.3);
}

/* ===================== */
/* Widget Type Cards     */
/* ===================== */
.widget-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.widget-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem;
  text-align: center;
  transition: all 0.2s ease;
}

.widget-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-1px);
}

.widget-card .widget-name {
  font-weight: 600;
  color: var(--accent-cyan);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
}

.widget-card .widget-desc {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ===================== */
/* Keyboard Shortcuts    */
/* ===================== */
.key-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.key-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 0.75rem 1rem;
}

.kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2.5rem;
  padding: 0.3rem 0.6rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-hover);
  border-radius: 6px;
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  white-space: nowrap;
}

.key-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===================== */
/* Command Cards         */
/* ===================== */
.command-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}

.command-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 1.25rem 1.5rem;
}

.command-card h4 {
  margin: 0 0 0.35rem;
  font-size: 1rem;
  color: var(--text-primary);
}

.command-card h4 code {
  color: var(--accent-cyan);
  background: none;
  border: none;
  padding: 0;
  font-size: 1rem;
}

.command-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin: 0;
}

/* ===================== */
/* Footer                */
/* ===================== */
footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
}

footer a {
  color: var(--accent-cyan);
  text-decoration: none;
}

footer a:hover {
  text-decoration: underline;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 2rem;
  margin-bottom: 1rem;
}

/* ===================== */
/* Responsive            */
/* ===================== */
@media (max-width: 1024px) {
  .main-layout {
    grid-template-columns: 1fr;
  }

  #sidebar { display: none; }

  .menu-toggle { display: flex; }
  .mobile-menu { display: block; }
  .mobile-menu-overlay { display: block; }

  .desktop-nav { display: none; }
}

@media (max-width: 768px) {
  .hero { padding: 8rem 0 3rem; }
  .hero h1 { font-size: 2.25rem; }
  .hero-subtitle { font-size: 1rem; }
  .hero-banner { padding: 0 1rem; }
  .hero-banner img { border-radius: 12px; }

  .feature-grid { grid-template-columns: 1fr; }
  .screenshot-grid { grid-template-columns: 1fr; }
  .command-grid { grid-template-columns: 1fr; }
  .widget-grid { grid-template-columns: repeat(2, 1fr); }
  .key-grid { grid-template-columns: 1fr; }

  .container { padding: 0 1rem; }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 1.75rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .widget-grid { grid-template-columns: 1fr; }
}