/* ── chamber-video Docs Theme ── */

/* Light (default) */
:root {
  --bg: #ffffff;
  --bg-elevated: #f6f6f7;
  --bg-card: #ffffff;
  --bg-soft: #f9f9fa;
  --border: #e2e2e3;
  --border-hover: #d0d0d3;
  --text: #213547;
  --text-2: rgba(60,60,60,0.7);
  --text-3: rgba(60,60,60,0.45);
  --accent-gold: #d4a72c;
  --accent-purple: #8b5cf6;
  --accent-cyan: #06b6d4;
  --accent-green: #22c55e;
  --accent-red: #ef4444;
  --glow-purple: rgba(139,92,246,0.12);
  --code-bg: #f6f6f7;
  --code-border: #e2e2e3;
  --font-display: 'Noto Serif SC', 'Songti SC', Georgia, serif;
  --font-body: 'DM Sans', -apple-system, 'SF Pro Text', 'Helvetica Neue', 'PingFang SC', 'Noto Sans SC', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;
  --sidebar-w: 260px;
}

/* Dark */
[data-theme="dark"] {
  --bg: #0b0d14;
  --bg-elevated: #11131c;
  --bg-card: rgba(17,19,28,0.7);
  --bg-soft: #11131c;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.15);
  --text: #e6edf3;
  --text-2: #8b949e;
  --text-3: #484f58;
  --accent-gold: #f0c674;
  --accent-purple: #a78bfa;
  --accent-cyan: #22d3ee;
  --accent-green: #7ee787;
  --accent-red: #ff7b72;
  --glow-purple: rgba(167,139,250,0.15);
  --code-bg: #0d1117;
  --code-border: rgba(255,255,255,0.06);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background 0.3s ease, color 0.3s ease;
}

/* ── Theme Toggle ── */
.theme-toggle {
  position: fixed;
  bottom: 24px; right: 24px;
  z-index: 150;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  color: var(--text-2);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  transition: all 0.3s;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
}
.theme-toggle:hover {
  border-color: var(--border-hover);
  color: var(--accent-purple);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}
[data-theme="dark"] .theme-toggle { box-shadow: 0 4px 16px rgba(0,0,0,0.3); }

/* ── Scroll Progress ── */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  z-index: 200; width: 0%;
  transition: width 0.1s linear;
}

/* ── Top Nav ── */
.topnav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px) saturate(1.2);
  -webkit-backdrop-filter: blur(20px) saturate(1.2);
  border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 64px;
  display: flex; align-items: center; justify-content: space-between;
  transition: background 0.3s, border-color 0.3s;
}
[data-theme="dark"] .topnav {
  background: rgba(11,13,20,0.75);
}
.topnav-brand {
  font-size: 16px; font-weight: 700; color: var(--text);
  text-decoration: none; display: flex; align-items: center; gap: 10px;
}
.topnav-brand .dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  box-shadow: 0 0 12px rgba(139,92,246,0.35);
  animation: pulse-dot 3s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 8px rgba(139,92,246,0.25); }
  50% { box-shadow: 0 0 18px rgba(6,182,212,0.35); }
}
.topnav-links { display: flex; gap: 24px; font-size: 14px; }
.topnav-links a { color: var(--text-2); text-decoration: none; transition: all 0.25s; position: relative; padding: 4px 0; font-weight: 500; }
.topnav-links a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 1.5px; background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan)); transition: width 0.3s ease; }
.topnav-links a:hover, .topnav-links a.active { color: var(--text); }
.topnav-links a:hover::after, .topnav-links a.active::after { width: 100%; }

/* ── Sidebar ── */
.sidebar {
  position: fixed; top: 64px; left: 0; bottom: 0;
  width: var(--sidebar-w); padding: 28px 16px;
  border-right: 1px solid var(--border);
  background: rgba(255,255,255,0.7);
  backdrop-filter: blur(16px);
  overflow-y: auto; font-size: 14px;
  scrollbar-width: thin;
  transition: background 0.3s, border-color 0.3s;
}
[data-theme="dark"] .sidebar {
  background: rgba(11,13,20,0.6);
}
.sidebar::-webkit-scrollbar { width: 5px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--text-3); border-radius: 3px; }
.sidebar-group { margin-bottom: 24px; }
.sidebar-group-title {
  font-size: 10px; font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--text-3); margin-bottom: 10px;
  padding: 0 12px;
}
.sidebar-link {
  display: block; padding: 8px 12px; border-radius: 8px;
  color: var(--text-2); text-decoration: none; transition: all 0.2s;
  font-size: 13.5px; margin-bottom: 2px;
  border-left: 2px solid transparent;
}
.sidebar-link:hover {
  color: var(--accent-purple);
  background: rgba(139,92,246,0.05);
  border-left-color: rgba(139,92,246,0.3);
}
[data-theme="dark"] .sidebar-link:hover {
  background: rgba(167,139,250,0.06);
}
.sidebar-link.active {
  color: var(--accent-purple);
  background: rgba(139,92,246,0.06);
  font-weight: 600;
  border-left-color: var(--accent-purple);
}
[data-theme="dark"] .sidebar-link.active {
  background: rgba(167,139,250,0.08);
}

/* ── Content ── */
.content {
  margin-left: var(--sidebar-w);
  padding: 48px 52px 100px;
  max-width: 900px;
}
.content h1 {
  font-family: var(--font-display);
  font-size: 36px; font-weight: 700; margin-bottom: 10px;
  background: linear-gradient(135deg, var(--text) 20%, var(--accent-purple) 70%, var(--accent-cyan));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}
[data-theme="dark"] .content h1 {
  background: linear-gradient(135deg, #fff 20%, var(--accent-purple) 70%, var(--accent-cyan));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.content .subtitle {
  font-size: 16px; color: var(--text-2); margin-bottom: 40px;
}
.content h2 {
  font-family: var(--font-display);
  font-size: 24px; font-weight: 700; margin-top: 48px; margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  letter-spacing: -0.01em;
}
.content h3 {
  font-size: 18px; font-weight: 700; margin-top: 32px; margin-bottom: 10px;
  color: var(--text);
}
.content p { margin-bottom: 14px; font-size: 15px; color: var(--text-2); }
.content ul, .content ol { margin-bottom: 14px; padding-left: 24px; font-size: 15px; }
.content li { margin-bottom: 6px; color: var(--text-2); }
.content a { color: var(--accent-purple); text-decoration: none; transition: all 0.2s; }
.content a:hover { color: var(--accent-cyan); text-decoration: underline; }
.content strong { color: var(--text); font-weight: 600; }
.content hr { margin: 40px 0; border: 0; border-top: 1px solid var(--border); }

/* ── Code Blocks ── */
.content pre {
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 12px; padding: 22px 26px;
  font-family: var(--font-mono);
  font-size: 13.5px; line-height: 1.75; overflow-x: auto;
  margin-bottom: 18px;
  position: relative;
}
.content pre::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139,92,246,0.1), transparent);
}
[data-theme="dark"] .content pre::before {
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
}
.content code {
  font-family: var(--font-mono);
  font-size: 13px;
}
.content p code, .content li code, .content td code {
  background: rgba(139,92,246,0.08); color: var(--accent-purple);
  padding: 2px 7px; border-radius: 5px; font-size: 12.5px;
  border: 1px solid rgba(139,92,246,0.08);
}
[data-theme="dark"] .content p code, [data-theme="dark"] .content li code, [data-theme="dark"] .content td code {
  background: rgba(167,139,250,0.1);
  border-color: rgba(167,139,250,0.1);
}

/* Syntax highlighting */
.content pre .sh-comment { color: var(--text-3); }
.content pre .sh-keyword { color: var(--accent-purple); font-weight: 500; }
.content pre .sh-string { color: var(--accent-green); }
.content pre .sh-func { color: var(--accent-cyan); }
.content pre .sh-number { color: var(--accent-gold); }
.content pre .sh-class { color: var(--accent-gold); }
.content pre .sh-hl { color: var(--accent-purple); font-weight: 500; }
.content pre .sh-hl2 { color: var(--accent-cyan); }

/* ── Tables ── */
.content table {
  width: 100%; border-collapse: separate; border-spacing: 0;
  font-size: 14px; margin-bottom: 18px;
  background: var(--bg-card);
  border: 1px solid var(--border); border-radius: 12px;
  overflow: hidden;
  transition: background 0.3s;
}
[data-theme="dark"] .content table { backdrop-filter: blur(8px); }
.content th, .content td {
  text-align: left; padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}
.content tr:last-child td { border-bottom: none; }
.content th {
  background: var(--bg-soft);
  font-weight: 600; font-size: 11px;
  color: var(--text-3);
  text-transform: uppercase; letter-spacing: 0.8px;
}
.content tr:hover td { background: rgba(139,92,246,0.02); }
[data-theme="dark"] .content tr:hover td { background: rgba(255,255,255,0.015); }
.content tr td:first-child { color: var(--text); font-weight: 500; }

/* ── Cards ── */
.card-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px; margin: 24px 0;
}
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: 14px; padding: 26px; transition: all 0.3s;
  text-decoration: none; color: var(--text);
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139,92,246,0.08), transparent);
}
[data-theme="dark"] .card::before {
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
}
.card:hover {
  border-color: rgba(139,92,246,0.2);
  box-shadow: 0 8px 28px var(--glow-purple);
  transform: translateY(-3px);
}
.card h3 { font-size: 16px; margin-bottom: 10px; font-weight: 700; color: var(--text); }
.card p { font-size: 14px; color: var(--text-2); margin-bottom: 0; }

/* ── Callouts ── */
.callout {
  padding: 16px 20px; border-radius: 10px; margin-bottom: 18px;
  font-size: 14px; line-height: 1.7;
}
.callout-tip {
  background: rgba(139,92,246,0.05);
  border-left: 3px solid var(--accent-purple);
  color: var(--text-2);
}
[data-theme="dark"] .callout-tip {
  background: rgba(167,139,250,0.06);
}
.callout-warn {
  background: rgba(245, 158, 11, 0.04);
  border-left: 3px solid #f59e0b;
  color: var(--text-2);
}
[data-theme="dark"] .callout-warn {
  background: rgba(245, 158, 11, 0.05);
}

.hl { color: var(--accent-purple); }
.hl2 { color: var(--accent-cyan); }

/* ── Bad / Good blocks ── */
.bad {
  background: rgba(239, 68, 68, 0.05);
  border-left: 3px solid var(--accent-red);
  padding: 14px 18px; border-radius: 0 10px 10px 0;
  margin-bottom: 10px;
}
[data-theme="dark"] .bad {
  background: rgba(239, 68, 68, 0.06);
}
.good {
  background: rgba(34, 197, 94, 0.05);
  border-left: 3px solid var(--accent-green);
  padding: 14px 18px; border-radius: 0 10px 10px 0;
  margin-bottom: 18px;
}
[data-theme="dark"] .good {
  background: rgba(34, 197, 94, 0.06);
}
.bad-label { color: var(--accent-red); font-weight: 700; font-size: 12px; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }
.good-label { color: var(--accent-green); font-weight: 700; font-size: 12px; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.5px; }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--text-3); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-2); }
::selection {
  background: rgba(139,92,246,0.2);
  color: var(--text);
}
[data-theme="dark"] ::selection {
  background: rgba(167,139,250,0.3);
  color: #fff;
}

/* ── Mobile ── */
@media(max-width: 860px) {
  .sidebar { display: none; }
  .content { margin-left: 0; padding: 28px 20px; max-width: 100%; }
  .topnav-links { gap: 16px; }
}
@media(max-width: 480px) {
  .topnav { padding: 0 16px; }
  .topnav-links a { font-size: 13px; }
  .content h1 { font-size: 28px; }
  .content h2 { font-size: 20px; }
  .card-grid { grid-template-columns: 1fr; }
}