/* =========================================================
   kcolbchain Docs — Documentation Stylesheet
   ========================================================= */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:       #0a0a0f;
  --bg-card:  #12121a;
  --bg-hover: #1a1a26;
  --bg-sidebar: #0e0e16;
  --border:   #1e1e2e;
  --text:     #e0e0e8;
  --text-dim: #8888a0;
  --brand:       #f5e03a;
  --brand-hover: #e8d030;
  --brand-muted: rgba(245, 224, 58, 0.14);
  --accent:      #2fd4ff;
  --accent-dim:  #1cb8db;
  --accent-muted: rgba(47, 212, 255, 0.12);
  --accent-glow:  rgba(47, 212, 255, 0.32);
  --accent-2:    var(--brand);
  --white:    #f5f5fa;
  --radius:   8px;
  --radius-lg: 12px;
  --sidebar-w: 260px;
  --header-h: 56px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background:
    radial-gradient(680px 440px at 6% -4%, rgba(47,212,255,.12), transparent 56%),
    radial-gradient(480px 320px at 100% 0%, rgba(245,224,58,.05), transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  font-size: 15px;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--brand); text-decoration: underline; }

/* --- Header --- */
.docs-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  background: rgba(10, 10, 15, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
  padding: 0 24px;
  gap: 16px;
}

.docs-header-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
  display: flex;
  align-items: center;
  gap: 8px;
}

.docs-header-brand a { color: var(--white); }
.docs-header-brand a:hover { text-decoration: none; }

.docs-header-brand .sep {
  color: var(--text-dim);
  font-weight: 400;
}

.docs-header-project {
  color: var(--accent);
  font-family: 'JetBrains Mono', monospace;
  font-size: .9rem;
}

.docs-header-links {
  margin-left: auto;
  display: flex;
  gap: 16px;
  font-size: .85rem;
}

.docs-header-links a { color: var(--text-dim); }
.docs-header-links a:hover { color: var(--white); text-decoration: none; }

/* --- Sidebar --- */
.docs-sidebar {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 20px 0;
  z-index: 50;
}

.docs-sidebar-section {
  padding: 0 16px;
  margin-bottom: 24px;
}

.docs-sidebar-title {
  font-size: .7rem;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--text-dim);
  padding: 0 8px;
  margin-bottom: 8px;
}

.docs-sidebar-link {
  display: block;
  padding: 6px 8px;
  border-radius: 6px;
  font-size: .85rem;
  color: var(--text-dim);
  transition: all .15s;
}

.docs-sidebar-link:hover {
  background: var(--bg-hover);
  color: var(--white);
  text-decoration: none;
}

.docs-sidebar-link.active {
  background: var(--accent-muted);
  color: var(--accent);
  font-weight: 500;
}

/* --- Projects list (index page) --- */
.docs-projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 16px;
}

.docs-project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: all .2s;
  display: flex;
  flex-direction: column;
  color: var(--text);
  min-height: 100%;
}

.docs-project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 28px var(--accent-glow);
  transform: translateY(-3px);
  text-decoration: none;
  color: var(--text);
}

.docs-project-card h3 {
  font-family: 'JetBrains Mono', monospace;
  font-size: .95rem;
  color: var(--white);
  margin-bottom: 8px;
}

.docs-project-card p {
  font-size: .83rem;
  color: var(--text-dim);
  line-height: 1.5;
}

.docs-project-card .tags {
  display: flex;
  gap: 6px;
  margin-top: 12px;
  flex-wrap: wrap;
}

.docs-project-card .tag {
  font-size: .7rem;
  padding: 2px 8px;
  border-radius: 99px;
  background: var(--accent-muted);
  color: var(--accent);
  border: 1px solid rgba(47, 212, 255, 0.22);
}

.docs-project-card-footer {
  display: none;
  margin-top: auto;
  padding-top: 14px;
  margin-left: -20px;
  margin-right: -20px;
  margin-bottom: -20px;
  padding-left: 20px;
  padding-right: 20px;
  padding-bottom: 16px;
  border-top: 1px solid var(--border);
}

.docs-project-card-footer.is-visible {
  display: block;
}

.docs-project-sync {
  display: block;
  text-align: right;
  font-size: .72rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}


/* --- Main content --- */
.docs-main {
  margin-left: var(--sidebar-w);
  margin-top: var(--header-h);
  padding: 40px 48px;
  max-width: 860px;
}

.docs-main h1 {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 8px;
}

.docs-main h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--white);
  margin-top: 40px;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

.docs-main h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
  margin-top: 28px;
  margin-bottom: 8px;
}

.docs-main p {
  margin-bottom: 16px;
  color: var(--text);
}

.docs-main .subtitle {
  font-size: 1.05rem;
  color: var(--text-dim);
  margin-bottom: 32px;
}

/* Code blocks */
.docs-main pre {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: .83rem;
  line-height: 1.6;
  margin-bottom: 20px;
}

.docs-main code {
  font-family: 'JetBrains Mono', monospace;
  font-size: .85em;
  background: var(--bg-card);
  padding: 2px 6px;
  border-radius: 4px;
}

.docs-main pre code {
  background: none;
  padding: 0;
}

/* Tables */
.docs-main table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 20px;
}

.docs-main th, .docs-main td {
  padding: 10px 14px;
  border: 1px solid var(--border);
  text-align: left;
  font-size: .85rem;
}

.docs-main th {
  background: var(--bg-card);
  color: var(--white);
  font-weight: 600;
}

/* Lists */
.docs-main ul, .docs-main ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.docs-main li {
  margin-bottom: 6px;
  font-size: .9rem;
}

/* Callout boxes */
.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-muted);
  padding: 14px 18px;
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 20px;
  font-size: .88rem;
}

.callout-warning {
  border-left-color: #f59e0b;
  background: rgba(245, 158, 11, .06);
}

/* Navigation cards */
.docs-nav-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.docs-nav-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  transition: all .2s;
  display: block;
  color: var(--text);
}

.docs-nav-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 22px var(--accent-glow);
  text-decoration: none;
  color: var(--white);
}

.docs-nav-card h4 {
  font-size: .9rem;
  color: var(--white);
  margin-bottom: 4px;
}

.docs-nav-card p {
  font-size: .8rem;
  color: var(--text-dim);
  margin: 0;
}

/* --- Table of Contents (right) --- */
.docs-toc {
  position: fixed;
  top: calc(var(--header-h) + 40px);
  right: 24px;
  width: 200px;
  font-size: .78rem;
}

.docs-toc-title {
  text-transform: uppercase;
  letter-spacing: .06em;
  font-size: .7rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.docs-toc a {
  display: block;
  padding: 3px 0 3px 12px;
  color: var(--text-dim);
  border-left: 1px solid var(--border);
  transition: all .15s;
}

.docs-toc a:hover {
  color: var(--white);
  border-left-color: var(--accent);
  text-decoration: none;
}

/* --- Docs hub (index): same search/tag UI as directory --- */
#docs-hub .docs-hub-lead {
  font-size: .95rem;
  color: var(--text-dim);
  line-height: 1.65;
  max-width: 36rem;
  margin-bottom: 28px;
}

/* Flush on page bg like directory hero — no inner card */
.docs-hub-panel {
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  margin-bottom: 8px;
  width: 100%;
  max-width: 100%;
}

.docs-hub-panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

/* Directory .kicker */
.docs-hub-panel-label {
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--brand);
  margin-bottom: 0;
}

.docs-hub-clear {
  font-size: .75rem;
  font-weight: 600;
  color: var(--brand);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px 10px;
  border-radius: var(--radius);
  font-family: inherit;
  flex-shrink: 0;
}

.docs-hub-clear:hover {
  background: var(--bg-hover);
  color: var(--white);
}

/* Directory search: pill field, bg-card, 520px cap */
.docs-hub-panel .search-wrap {
  position: relative;
  max-width: 520px;
  margin-bottom: 20px;
}

.docs-hub-panel .search-input {
  width: 100%;
  padding: 14px 22px;
  padding-right: 88px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 9999px;
  color: var(--white);
  font-size: .9rem;
  font-family: inherit;
  outline: none;
  transition: border-color .15s, box-shadow .15s;
}

.docs-hub-panel .search-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent), 0 0 18px var(--accent-glow);
}

.docs-hub-panel .search-input::placeholder {
  color: var(--text-dim);
}

.docs-hub-panel .search-count {
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: .75rem;
  color: var(--text-dim);
  font-family: 'JetBrains Mono', monospace;
  pointer-events: none;
}

.docs-hub-panel-hint {
  font-size: .78rem;
  color: var(--text-dim);
  margin-top: 0;
  margin-bottom: 10px;
  max-width: 520px;
}

/* Directory tag cloud */
.docs-hub-panel .tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
  max-width: 100%;
}

.docs-hub-panel button.tag {
  flex-shrink: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: .7rem;
  font-weight: 500;
  color: var(--text-dim);
  cursor: pointer;
  transition: all .15s;
  font-family: inherit;
}

.docs-hub-panel button.tag:hover {
  border-color: var(--accent);
  color: var(--white);
}

.docs-hub-panel button.tag.active {
  background: var(--bg-card);
  border-color: var(--accent);
  color: var(--white);
  box-shadow: 0 0 0 1px var(--accent), 0 0 20px var(--accent-glow);
}

/* Section titles on hub — same rhythm as directory .cat-title */
#docs-hub > h2 {
  font-size: .7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-dim);
  margin-top: 36px;
  margin-bottom: 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

#docs-hub > h2:first-of-type {
  margin-top: 32px;
}

#docs-hub .docs-projects-grid {
  margin-bottom: 8px;
}

/* --- Full-width (index page, no sidebar) --- */
.docs-main.full-width {
  margin-left: 0;
  max-width: 1120px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Responsive --- */
@media (max-width: 900px) {
  .docs-sidebar { display: none; }
  .docs-main { margin-left: 0; padding: 24px 16px; }
  .docs-toc { display: none; }
  .docs-projects-grid { grid-template-columns: 1fr; }
}