/* Shared page chrome for the demo pages (not part of the framework). */
:root {
  --page-bg: #f5f6f8;
  --page-fg: #181d1f;
  --page-muted: rgba(24, 29, 31, 0.6);
  --page-card: #ffffff;
  --page-border: #dde2eb;
  --page-accent: #2196f3;
}
body.dark {
  --page-bg: #101415;
  --page-fg: #ffffff;
  --page-muted: rgba(255, 255, 255, 0.6);
  --page-card: #181d1f;
  --page-border: rgba(255, 255, 255, 0.16);
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--page-bg);
  color: var(--page-fg);
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, "Noto Sans KR", sans-serif;
  font-size: 14px;
  transition: background 0.15s;
}

.page {
  max-width: 1240px;
  margin: 0 auto;
  padding: 24px 24px 64px;
}

.topnav {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 14px 0;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--page-border);
}
.topnav .brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 16px;
}
.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: 7px;
  background: linear-gradient(135deg, #2196f3, #0d5cab);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 13px;
  font-weight: 800;
}
.topnav nav { display: flex; gap: 4px; }
.topnav nav a {
  padding: 7px 14px;
  border-radius: 6px;
  color: var(--page-muted);
  text-decoration: none;
  font-weight: 500;
}
.topnav nav a:hover { color: var(--page-fg); background: rgba(33, 150, 243, 0.08); }
.topnav nav a.active { color: var(--page-accent); background: rgba(33, 150, 243, 0.12); }
.topnav .spacer { flex: 1; }

h1 { font-size: 24px; margin: 0 0 6px; }
.subtitle { color: var(--page-muted); margin: 0 0 24px; }

h2.section {
  font-size: 17px;
  margin: 44px 0 4px;
  padding-top: 12px;
}
p.section-desc { color: var(--page-muted); margin: 0 0 14px; max-width: 760px; }

/* ---------------------------------------------------------------------------
   features.html 사이드바 레이아웃 — api.html의 .docs-* 와 같은 구조.
   카테고리(h2.cat) > 섹션(h2.section) 두 단계이고, 사이드바 목록은 로드 시
   DOM에서 만들어진다(섹션을 추가해도 네비게이션을 따로 고칠 필요가 없게).
--------------------------------------------------------------------------- */
.features-layout {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}
@media (max-width: 860px) {
  .features-layout { grid-template-columns: 1fr; }
  .features-sidebar { position: static !important; max-height: none !important; }
}
.features-sidebar {
  position: sticky;
  top: 16px;
  max-height: calc(100vh - 32px);
  overflow-y: auto;
  padding-right: 8px;
}
.features-content { min-width: 0; }

.features-search {
  width: 100%;
  height: 36px;
  padding: 0 12px;
  margin-bottom: 14px;
  font: inherit;
  color: var(--page-fg);
  background: var(--page-card);
  border: 1px solid var(--page-border);
  border-radius: 8px;
  outline: none;
}
.features-search:focus { border-color: var(--page-accent); }

.feat-nav-cat { margin-bottom: 4px; }
.feat-nav-cat > a {
  display: block;
  padding: 6px 10px;
  font-weight: 600;
  font-size: 13px;
  color: var(--page-fg);
  text-decoration: none;
  border-radius: 6px;
}
.feat-nav-entries { margin: 0 0 6px; }
.feat-nav-entries a {
  display: block;
  padding: 3px 10px 3px 22px;
  font-size: 12.5px;
  color: var(--page-muted);
  text-decoration: none;
  border-left: 2px solid var(--page-border);
  margin-left: 10px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.feat-nav-cat > a:hover, .feat-nav-entries a:hover {
  color: var(--page-accent);
  background: rgba(33, 150, 243, 0.07);
}
.feat-nav-cat > a.active, .feat-nav-entries a.active {
  color: var(--page-accent);
  border-left-color: var(--page-accent);
}
.feat-nav-cat > a.active { background: rgba(33, 150, 243, 0.1); }
.feat-nav-hidden { display: none; }

/* 카테고리 제목 — h2.section보다 한 단계 위. 선택자가 태그+클래스라 서로 안 겹친다 */
h2.cat {
  font-size: 21px;
  margin: 52px 0 4px;
  padding-top: 18px;
  border-top: 1px solid var(--page-border);
  scroll-margin-top: 12px;
}
.features-content > h2.cat:first-of-type { margin-top: 0; padding-top: 0; border-top: none; }
h2.cat .cat-en {
  font-size: 13px;
  font-weight: 500;
  color: var(--page-muted);
  margin-left: 8px;
}
p.cat-desc { color: var(--page-muted); margin: 0 0 6px; max-width: 760px; }
h2.section { scroll-margin-top: 12px; }
.features-no-results { color: var(--page-muted); display: none; }

.card {
  background: var(--page-card);
  border: 1px solid var(--page-border);
  border-radius: 12px;
  padding: 16px;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.toolbar .grow { flex: 1; }

.tb-input {
  height: 36px;
  padding: 0 12px;
  min-width: 240px;
  font: inherit;
  color: var(--page-fg);
  background: var(--page-card);
  border: 1px solid var(--page-border);
  border-radius: 8px;
  outline: none;
}
.tb-input:focus { border-color: var(--page-accent); }

.tb-btn {
  height: 36px;
  padding: 0 14px;
  font: inherit;
  font-weight: 500;
  color: var(--page-fg);
  background: var(--page-card);
  border: 1px solid var(--page-border);
  border-radius: 8px;
  cursor: pointer;
}
.tb-btn:hover { border-color: var(--page-accent); color: var(--page-accent); }
.tb-btn.primary {
  background: var(--page-accent);
  border-color: var(--page-accent);
  color: #fff;
}
.tb-btn.primary:hover { background: #1180d8; color: #fff; }
.tb-btn:disabled { opacity: 0.45; cursor: default; pointer-events: none; }

.tb-check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 36px;
  font-size: 13.5px;
  color: var(--page-fg);
  cursor: pointer;
  user-select: none;
}
.tb-check input { accent-color: var(--page-accent); }

.status-line {
  margin-top: 10px;
  color: var(--page-muted);
  font-size: 13px;
  min-height: 18px;
}

.grid-wrap-lg { height: 560px; }
.grid-wrap-md { height: 380px; }
.grid-wrap-sm { height: 300px; }

.feature-grid-2col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
@media (max-width: 900px) { .feature-grid-2col { grid-template-columns: 1fr; } }

code.inline {
  background: rgba(33, 150, 243, 0.1);
  color: var(--page-accent);
  border-radius: 4px;
  padding: 1px 6px;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
}

pre.snippet {
  background: #14181a;
  color: #e6edf3;
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
}

/* Components gallery */
.gallery-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  padding: 14px 0;
}
.spec-label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--page-muted);
  margin: 22px 0 6px;
}
.swatch-row { display: flex; flex-wrap: wrap; gap: 10px; }
.swatch {
  width: 150px;
  border: 1px solid var(--page-border);
  border-radius: 8px;
  overflow: hidden;
  background: var(--page-card);
}
.swatch .chip { height: 44px; }
.swatch .meta { padding: 8px 10px; font-size: 11.5px; }
.swatch .meta strong { display: block; font-size: 12px; }
.swatch .meta span { color: var(--page-muted); font-family: ui-monospace, Consolas, monospace; }

/* ==========================================================================
   Example / View Source tab cards (demo/example-tabs.js)
   ========================================================================== */

.example-card {
  background: var(--page-card);
  border: 1px solid var(--page-border);
  border-radius: 12px;
  overflow: hidden;
  margin: 14px 0 40px;
}
.example-card [hidden] { display: none !important; }

.example-tabbar {
  display: flex;
  gap: 2px;
  padding: 0 10px;
  border-bottom: 1px solid var(--page-border);
}
.example-tab {
  padding: 12px 16px 10px;
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--page-muted);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  cursor: pointer;
}
.example-tab:hover { color: var(--page-fg); }
.example-tab.active {
  color: var(--page-accent);
  border-bottom-color: var(--page-accent);
}

.example-html { padding: 16px; }
.example-source-panel { padding: 8px 16px 16px; }

.example-src-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--page-muted);
  margin: 12px 0 6px;
}

.example-error {
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: 8px;
  background: rgba(224, 37, 37, 0.08);
  color: #d02020;
  font-size: 13px;
}

/* ==========================================================================
   Code blocks + syntax highlight (demo/highlight.js output)
   ========================================================================== */

.api-example {
  position: relative;
  background: #14181a;
  border-radius: 8px;
  padding: 12px 14px;
  margin: 6px 0;
  overflow-x: auto;
  font-family: ui-monospace, "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  color: #e6edf3;
}
.api-example code { background: none; padding: 0; color: inherit; font-size: inherit; }
.hl-kw { color: #ff7b72; }
.hl-str { color: #a5d6ff; }
.hl-num { color: #79c0ff; }
.hl-com { color: #8b949e; font-style: italic; }
.hl-fn { color: #d2a8ff; }

.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  padding: 3px 10px;
  font-size: 11.5px;
  font-family: inherit;
  color: #e6edf3;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 6px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.12s;
}
.api-example:hover .copy-btn { opacity: 1; }
.copy-btn:hover { background: rgba(255, 255, 255, 0.2); }