/* ============================================================
   YouCoder Docs — shared styles (aligned with the site's
   light humanistic design language: --yc-* tokens)
   ============================================================ */
body {
  background: var(--yc-bg);
  color: var(--yc-text);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

/* ── Top nav (mirrors the main site) ── */
.docs-nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--yc-nav-h, 68px);
  background: rgba(245, 244, 240, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--yc-border-light);
}
.docs-nav-inner {
  max-width: 1180px; margin: 0 auto; height: 100%;
  display: flex; align-items: center; gap: 12px; padding: 0 var(--yc-space-6);
}
.docs-nav a { color: var(--yc-text-secondary); text-decoration: none; font-size: 0.9rem; font-weight: 500; transition: color var(--yc-fast); }
.docs-nav a:hover { color: var(--yc-brand); }
.docs-nav .nav-logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.05rem; color: var(--yc-text); }
.nav-sep { color: var(--yc-text-muted); font-size: 0.8rem; }
.nav-current { color: var(--yc-text); font-weight: 600; font-size: 0.9rem; }
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }
/* lang-toggle inherits the main site style (css/style.css) */

/* ── Layout: sidebar + article (OpenAI-style docs) ── */
.docs-layout {
  max-width: 1180px; margin: 0 auto;
  display: flex; gap: 48px;
  padding: var(--yc-space-8) var(--yc-space-6) 96px;
}
.docs-sidebar {
  flex: 0 0 220px; position: sticky; top: 92px;
  align-self: flex-start; max-height: calc(100vh - 120px);
  overflow-y: auto; padding-right: 8px;
}
.sidebar-group { margin-bottom: 24px; }
.sidebar-heading {
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--yc-text-muted);
  margin-bottom: 8px; padding: 0 8px;
}
.sidebar-nav a {
  display: block; padding: 6px 8px; border-radius: 6px;
  font-size: 0.85rem; color: var(--yc-text-secondary);
  text-decoration: none; transition: all var(--yc-fast);
}
.sidebar-nav a:hover { background: var(--yc-hover); color: var(--yc-text); }
.sidebar-nav a.active { color: var(--yc-brand); font-weight: 600; background: var(--yc-brand-bg); }
.sidebar-nav a.toc-link { padding-left: 16px; font-size: 0.8rem; color: var(--yc-text-muted); }
.sidebar-nav a.toc-link:hover { color: var(--yc-text); background: none; }
.sidebar-nav a.toc-link.active { color: var(--yc-brand); background: none; font-weight: 600; }

/* ── Article ── */
.doc-article { flex: 1 1 auto; min-width: 0; max-width: 780px; }
.doc-article h1 {
  font-size: 2.1rem; font-weight: 800; color: var(--yc-text);
  letter-spacing: -0.03em; margin-bottom: 6px; line-height: 1.2;
}
.doc-article h1 span { color: var(--yc-brand); }
.doc-article .subtitle { color: var(--yc-text-secondary); font-size: 1.05rem; margin-bottom: 36px; }

.doc-article h2 {
  font-size: 1.35rem; font-weight: 700; color: var(--yc-text);
  margin-top: 44px; margin-bottom: 14px; scroll-margin-top: 84px;
}
.doc-article h3 {
  font-size: 1.05rem; font-weight: 600; color: var(--yc-text);
  margin-top: 28px; margin-bottom: 10px;
}
.doc-article p { color: var(--yc-text-secondary); margin-bottom: 12px; line-height: 1.75; }
.doc-article ul, .doc-article ol { margin: 6px 0 16px 24px; color: var(--yc-text-secondary); }
.doc-article li { margin-bottom: 5px; line-height: 1.65; }

.doc-article a { color: var(--yc-brand); text-decoration: none; }
.doc-article a:hover { text-decoration: underline; }

.doc-article code {
  background: var(--yc-surface); padding: 2px 7px; border-radius: 4px;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.85em; color: var(--yc-brand);
}
.doc-article pre {
  background: var(--yc-code-bg); border-radius: 10px; padding: 16px 20px;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.82rem; overflow-x: auto; white-space: pre-wrap;
  margin: 10px 0 18px; line-height: 1.55; color: var(--yc-code-text);
}
.doc-article pre a { color: #9ecb8f; }
.doc-article pre .cmt { color: #8a867a; }
.doc-article pre .path { color: #7fb069; }
.doc-article pre .env { color: #d9a066; }
.doc-article kbd {
  background: var(--yc-surface); border: 1px solid var(--yc-border);
  border-bottom-width: 2px; border-radius: 4px; padding: 1px 6px;
  font-family: "JetBrains Mono", Consolas, monospace; font-size: 0.76em;
  color: var(--yc-text); white-space: nowrap;
}

.doc-note {
  background: var(--yc-quote-bg); border: 1px solid rgba(90, 122, 74, 0.2);
  border-radius: 8px; padding: 13px 16px; margin: 16px 0;
  font-size: 0.92rem; color: var(--yc-text-secondary);
}
.doc-note strong { color: var(--yc-brand); }
.doc-warn {
  background: rgba(217, 160, 102, 0.08); border: 1px solid rgba(217, 160, 102, 0.25);
  border-radius: 8px; padding: 13px 16px; margin: 16px 0;
  font-size: 0.92rem; color: var(--yc-text-secondary);
}
.doc-warn strong { color: #b07c3e; }
.doc-tip {
  background: rgba(90, 122, 74, 0.06); border: 1px solid rgba(90, 122, 74, 0.18);
  border-radius: 8px; padding: 13px 16px; margin: 16px 0;
  font-size: 0.92rem; color: var(--yc-text-secondary);
}
.doc-tip strong { color: var(--yc-brand); }

.doc-article table {
  width: 100%; border-collapse: collapse; margin: 12px 0 18px;
  display: block; overflow-x: auto;
}
.doc-article th, .doc-article td {
  padding: 9px 14px; text-align: left; border-bottom: 1px solid var(--yc-border-light);
  font-size: 0.88rem;
}
.doc-article th {
  background: var(--yc-surface); font-weight: 600; color: var(--yc-text-muted);
  text-transform: uppercase; letter-spacing: 0.04em; font-size: 0.74rem;
}
.doc-article td { font-size: 0.85rem; color: var(--yc-text-secondary); }
.doc-article td code { white-space: nowrap; }

/* ── Docs index (cards) ── */
.docs-index-article { flex: 1 1 auto; min-width: 0; max-width: 900px; }
.docs-header { text-align: center; margin-bottom: 44px; }
.docs-header .badge {
  display: inline-block; background: var(--yc-brand-bg);
  color: var(--yc-brand); padding: 5px 16px; border-radius: 999px;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.04em; margin-bottom: 16px;
}
.docs-header h1 { font-size: 2.4rem; font-weight: 800; color: var(--yc-text); letter-spacing: -0.03em; margin-bottom: 14px; }
.docs-header h1 span { color: var(--yc-brand); }
.docs-header p { color: var(--yc-text-secondary); font-size: 1.05rem; max-width: 560px; margin: 0 auto; }
.docs-cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-bottom: 40px; }
.doc-card {
  background: var(--yc-surface-white); border: 1px solid var(--yc-border-light);
  border-radius: 12px; padding: 26px 24px;
  transition: all var(--yc-normal); text-decoration: none; color: var(--yc-text);
  display: flex; flex-direction: column; gap: 12px;
}
.doc-card:hover { border-color: var(--yc-brand); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(90, 122, 74, 0.12); }
.doc-card .card-icon {
  width: 46px; height: 46px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center; font-size: 1.35rem;
}
.doc-card .card-icon.tui { background: rgba(90, 122, 74, 0.12); }
.doc-card .card-icon.desktop { background: rgba(139, 92, 246, 0.10); }
.doc-card .card-icon.vscode { background: rgba(59, 130, 246, 0.10); }
.doc-card .card-icon.config { background: rgba(245, 158, 11, 0.12); }
.doc-card .card-icon.faq { background: rgba(139, 92, 246, 0.10); }
.doc-card h3 { font-size: 1.15rem; font-weight: 700; color: var(--yc-text); }
.doc-card p { color: var(--yc-text-secondary); font-size: 0.9rem; line-height: 1.65; flex: 1; }
.doc-card .card-link {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--yc-brand); font-weight: 600; font-size: 0.88rem; transition: gap var(--yc-fast);
}
.doc-card:hover .card-link { gap: 10px; }

.quickstart { margin: 36px auto 0; }
.quickstart h2 { font-size: 1.2rem; font-weight: 700; color: var(--yc-text); margin-bottom: 14px; }
.quickstart .steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.quickstart .step {
  background: var(--yc-surface-white); border: 1px solid var(--yc-border-light);
  border-radius: 10px; padding: 18px;
}
.quickstart .step .num {
  width: 26px; height: 26px; border-radius: 50%;
  background: var(--yc-brand-bg); color: var(--yc-brand);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.8rem; margin-bottom: 10px;
}
.quickstart .step h4 { color: var(--yc-text); font-size: 0.95rem; margin-bottom: 6px; }
.quickstart .step p { color: var(--yc-text-secondary); font-size: 0.84rem; line-height: 1.6; }
.quickstart .step code {
  background: var(--yc-surface); padding: 2px 6px; border-radius: 4px;
  font-family: "JetBrains Mono", Consolas, monospace; font-size: 0.8em; color: var(--yc-brand);
}

/* ── Bottom prev/next nav (OpenAI-style) ── */
.docs-pagination {
  display: flex; justify-content: space-between; gap: 16px;
  margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--yc-border-light);
}
.docs-pagination a {
  flex: 1; display: block; padding: 14px 16px;
  border: 1px solid var(--yc-border-light); border-radius: 10px;
  text-decoration: none; color: var(--yc-text); transition: all var(--yc-fast);
}
.docs-pagination a:hover { border-color: var(--yc-brand); }
.docs-pagination a.next { text-align: right; }
.docs-pagination .p-label { font-size: 0.72rem; color: var(--yc-text-muted); margin-bottom: 4px; }
.docs-pagination .p-title { font-size: 0.92rem; font-weight: 600; color: var(--yc-text); }

/* ── Language blocks ──
   zh block is visible by default (no CSS hiding) so pages render even
   before/without JS; i18n.js toggles per CURRENT_LANG and en starts
   inline display:none.
   NOTE: explicit display:block is a defensive fallback — older cached
   copies of this file used display:none, which blanked every page. */
[data-lang-block] { display: block; }

/* ── Responsive ── */
@media (max-width: 900px) {
  .docs-sidebar { display: none; }
  .docs-layout { padding: var(--yc-space-6) var(--yc-space-4) 64px; gap: 0; }
}
@media (max-width: 600px) {
  .doc-article h1 { font-size: 1.55rem; }
  .docs-header h1 { font-size: 1.8rem; }
  .docs-cards { grid-template-columns: 1fr; }
  .quickstart .steps { grid-template-columns: 1fr; }
  .docs-nav-inner { padding: 0 var(--yc-space-4); }
  .nav-breadcrumb { display: none; }
}