/* ============================================================
   OceanRAG — docs.css
   Docs page app-like layout (sidebar, TOC, dark mode, RWD)
   ============================================================ */

/* CSS Variables */
:root {
  --sidebar-w: 280px;
  --header-h: 72px;
  --control-h: 52px;
  --bg-sidebar: #f8fafc;
  --border: #e2e8f0;
  --accent: #004d80;
  --text-main: #1e293b;
  --text-muted: #94a3b8;
}

/* Full-page Docs Layout Reset */
body {
  font-family: 'Inter', -apple-system, system-ui, sans-serif;
  margin: 0;
  padding-top: 0 !important;
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: white;
  color: var(--text-main);
}

/* Header */
.header.docs-nav {
  position: relative !important;
  height: var(--header-h);
  flex-shrink: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.97);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  transform: none !important;
  opacity: 1 !important;
  transition: background 0.3s ease;
}

.header.docs-nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.header.docs-nav .nav-links {
  position: static !important;
  opacity: 1 !important;
  visibility: visible !important;
  transform: none !important;
  flex-direction: row !important;
  background: transparent !important;
  backdrop-filter: none !important;
  gap: 32px;
  padding: 0 !important;
  border-top: none !important;
}

.header.docs-nav .nav-links a {
  font-size: 0.95rem;
}

.header.docs-nav .menu-toggle {
  display: none;
}

/* Control Bar */
.control-bar {
  height: var(--control-h);
  display: flex;
  align-items: center;
  padding: 0 24px;
  border-bottom: 1px solid var(--border);
  background: #fff;
  z-index: 90;
  flex-shrink: 0;
}

.control-bar > .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.control-left { display: flex; align-items: center; gap: 12px; }
.control-right { display: flex; align-items: center; gap: 8px; flex-wrap: nowrap; }

.icon-btn {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
  flex-shrink: 0;
}
.icon-btn:hover { background: #f1f5f9; color: var(--text-main); }

.toc-trigger {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-main);
  background: #fff;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}
.toc-trigger:hover { border-color: var(--accent); color: var(--accent); }

/* App Layout */
.app-container {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* Sidebar */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  transition: transform 0.3s ease, margin 0.3s ease;
}

.sidebar.collapsed {
  transform: translateX(-100%);
  margin-right: calc(-1 * var(--sidebar-w));
}

.sidebar-inner { padding: 24px 0; overflow-y: auto; flex: 1; }

.nav-section { margin-bottom: 20px; }

.nav-section-title {
  padding: 0 24px 8px;
  font-size: 11px;
  font-weight: 700;
  color: #94a3b8;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.nav-item {
  display: block;
  padding: 7px 24px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.15s;
  border-right: 2px solid transparent;
}
.nav-item:hover { color: var(--text-main); background: #f1f5f9; }
.nav-item.active { color: var(--accent); background: #eff6ff; border-right-color: var(--accent); }

/* Main Reader */
.main-reader {
  flex: 1;
  overflow-y: auto;
  scroll-behavior: smooth;
  background: white;
}

.content-canvas {
  max-width: 1000px;
  margin: 0 auto;
  padding: 28px 64px 100px;
}

/* Content Typography */
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}

h1 { font-size: 42px; font-weight: 800; color: #0f172a; margin: 0 0 16px 0; letter-spacing: -0.02em; }
.subtitle { font-size: 19px; color: var(--text-muted); font-weight: 400; margin-bottom: 32px; line-height: 1.55; }
h2 { font-size: 26px; font-weight: 700; color: #1e293b; margin: 56px 0 20px; border-bottom: 1px solid var(--border); padding-bottom: 10px; }
h3 { font-size: 19px; font-weight: 700; color: #334155; margin: 36px 0 14px; }
p { line-height: 1.8; margin-bottom: 20px; color: #334155; font-size: 15.5px; }
ul, ol { margin-bottom: 20px; padding-left: 20px; }
li { margin-bottom: 10px; line-height: 1.65; color: #334155; font-size: 15.5px; }

/* Code & Tables */
pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 24px;
  border-radius: 12px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
  line-height: 1.65;
  overflow-x: auto;
  margin: 28px 0;
}
code {
  font-family: 'JetBrains Mono', monospace;
  background: #f1f5f9;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.88em;
  color: #e11d48;
}
pre code { background: transparent; padding: 0; color: inherit; font-size: inherit; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 28px 0;
  font-size: 14px;
}
th {
  background: #f8fafc;
  text-align: left;
  padding: 11px 14px;
  font-weight: 700;
  color: #475569;
  border-bottom: 2px solid var(--border);
}
td {
  padding: 11px 14px;
  border-bottom: 1px solid var(--border);
  color: #334155;
  vertical-align: top;
}

/* Alerts */
.alert {
  padding: 18px 20px;
  border-radius: 12px;
  margin: 28px 0;
  display: flex;
  gap: 14px;
  font-size: 14.5px;
  line-height: 1.6;
}
.alert-info { background: #eff6ff; border: 1px solid #dbeafe; color: #1e40af; }

/* TOC Panel */
.toc-panel {
  position: fixed;
  top: calc(var(--header-h) + var(--control-h) + 10px);
  right: 20px;
  width: 272px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow: 0 20px 40px -8px rgba(0,0,0,0.12);
  z-index: 500;
  display: none;
  animation: slideUp 0.15s ease-out;
}
.toc-panel.active { display: block; }
@keyframes slideUp {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.toc-header { padding: 14px 16px; font-weight: 800; font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; color: #475569; border-bottom: 1px solid #f1f5f9; }
.toc-body { padding: 8px; max-height: 65vh; overflow-y: auto; }
.toc-link {
  display: block;
  padding: 7px 10px;
  font-size: 13px;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 6px;
  transition: 0.15s;
  line-height: 1.4;
}
.toc-link:hover { background: #f1f5f9; color: var(--accent); }

/* Version Toggle */
.version-toggle {
  display: inline-flex;
  background: #f1f5f9;
  padding: 4px;
  border-radius: 12px;
  margin-bottom: 28px;
  gap: 4px;
}
.v-btn {
  padding: 8px 16px;
  border-radius: 8px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
}
.v-btn:hover { color: var(--text-main); }
.v-btn.active { background: white; color: var(--accent); box-shadow: 0 3px 8px rgba(0,0,0,0.08); }

/* Dark Mode */
body.dark-mode { background: #0f172a; color: #f1f5f9; }
body.dark-mode .header.docs-nav { background: #1e293b; border-color: #334155; }
body.dark-mode .control-bar { background: #1e293b; border-color: #334155; }
body.dark-mode .header-logo span { color: #f1f5f9; }
body.dark-mode .nav-links a { color: #cbd5e1; }
body.dark-mode .nav-links a:hover { color: #60a5fa; }
body.dark-mode .sidebar { background: #1e293b; border-color: #334155; }
body.dark-mode .main-reader { background: #0f172a; }
body.dark-mode h1, body.dark-mode h2, body.dark-mode h3 { color: #f8fafc; }
body.dark-mode p, body.dark-mode li { color: #cbd5e1; }
body.dark-mode td { color: #94a3b8; border-color: #334155; }
body.dark-mode th { background: #1e293b; color: #f1f5f9; border-color: #334155; }
body.dark-mode .toc-panel { background: #1e293b; border-color: #334155; color: #f1f5f9; }
body.dark-mode .toc-header { color: #94a3b8; border-color: #334155; }
body.dark-mode .toc-link { color: #94a3b8; }
body.dark-mode .toc-link:hover { background: #334155; color: #60a5fa; }
body.dark-mode .nav-item:hover { background: #334155; color: #fff; }
body.dark-mode .nav-item.active { background: #1e3a5f; color: #60a5fa; border-right-color: #60a5fa; }
body.dark-mode .icon-btn { color: #94a3b8; }
body.dark-mode .icon-btn:hover { background: #334155; color: #fff; }
body.dark-mode .toc-trigger { background: #1e293b; border-color: #334155; color: #cbd5e1; }
body.dark-mode .version-toggle { background: #334155; }
body.dark-mode .v-btn.active { background: #1e293b; color: #60a5fa; }
body.dark-mode code { background: #1e293b; color: #f87171; }
body.dark-mode .alert-info { background: #1e3a5f; border-color: #1e40af; color: #93c5fd; }
body.dark-mode .nav-section-title { color: #64748b; }

/* Mobile / Tablet RWD */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 940;
}
.sidebar-overlay.active { display: block; }

@media (max-width: 900px) {
  .header.docs-nav .menu-toggle {
    display: flex !important;
  }

  .header.docs-nav .nav-links {
    position: fixed !important;
    top: var(--header-h) !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    background: rgba(255,255,255,0.98) !important;
    backdrop-filter: blur(10px) !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 40px !important;
    gap: 28px !important;
    opacity: 0 !important;
    visibility: hidden !important;
    transform: translateY(-16px) !important;
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease !important;
    z-index: 1001 !important;
    border-top: 1px solid var(--border) !important;
  }
  .header.docs-nav .nav-links.active {
    opacity: 1 !important;
    visibility: visible !important;
    transform: translateY(0) !important;
  }
  .header.docs-nav .nav-links li {
    width: 100%;
    text-align: center;
  }
  .header.docs-nav .nav-links a {
    font-size: 1.2rem;
    display: block;
    padding: 10px;
  }

  body.dark-mode .header.docs-nav .nav-links {
    background: rgba(15, 23, 42, 0.98) !important;
  }

  .sidebar {
    position: fixed !important;
    top: calc(var(--header-h) + var(--control-h)) !important;
    left: 0 !important;
    bottom: 0 !important;
    z-index: 950 !important;
    transform: translateX(-100%) !important;
    margin-right: 0 !important;
    width: min(var(--sidebar-w), 85vw);
    box-shadow: 4px 0 20px rgba(0,0,0,0.15);
  }
  .sidebar.active {
    transform: translateX(0) !important;
  }
  .sidebar.collapsed {
    transform: translateX(-100%) !important;
    margin-right: 0 !important;
  }

  .control-bar {
    padding: 0 16px;
    height: var(--control-h);
  }
  .control-left-info { display: none; }

  .content-canvas {
    padding: 20px 20px 80px;
  }
  h1 { font-size: 30px; }
  h2 { font-size: 22px; margin-top: 44px; }
  h3 { font-size: 17px; }
  p, li { font-size: 14.5px; }

  table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .toc-panel {
    right: 10px;
    left: 10px;
    width: auto;
    top: calc(var(--header-h) + var(--control-h) + 8px);
  }

  .version-toggle {
    display: flex;
    width: 100%;
  }
  .v-btn { flex: 1; justify-content: center; }
}

@media (max-width: 480px) {
  .content-canvas { padding: 16px 14px 80px; }
  h1 { font-size: 26px; }
  .toc-trigger span { display: none; }
  .control-right { gap: 4px; }
}