/* kWh Electric - GitBook-style documentation layout */
:root {
  --dark: #0B0B0E;
  --dark-warm: #120d04;
  --bronze: #CD7F32;
  --bronze-dark: #B86F28;
  --cream: #FFFBF0;
  --cream-soft: #FFF7E6;
  --brown: #2B1A08;
  --muted: #6B5A3F;
  --header-muted: rgba(255, 251, 240, 0.65);
  --sidebar-bg: #FFF7E6;
  --sidebar-border: #E3D2B0;
  --text: #0B0B0E;
  --text-muted: #6B5A3F;
  --text-light: #8B7355;
  --border: #E3D2B0;
  --code-bg: #FFF7E6;
  --code-border: #E3D2B0;
  --inline-code-bg: #FFF0D4;
  --white: #FFFFFF;
  --font: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --header-h: 56px;
  --sidebar-w: 260px;
  --toc-w: 220px;
  --content-max: 720px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: var(--cream);
  -webkit-font-smoothing: antialiased;
}

/* ── Top header ── */
.docs-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: var(--dark-warm);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 24px;
  border-bottom: 1px solid rgba(205, 127, 50, 0.25);
}
.docs-header .brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  text-decoration: none;
  color: var(--cream);
}
.docs-header .brand img {
  height: 22px;
  width: auto;
}
.docs-tabs {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 8px;
}
.docs-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 6px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--header-muted);
  text-decoration: none;
  transition: background 0.15s, color 0.15s;
}
.docs-tab:hover { color: var(--cream); background: rgba(205, 127, 50, 0.15); }
.docs-tab.is-active {
  background: var(--bronze);
  color: var(--cream);
}
.docs-tab svg { width: 14px; height: 14px; opacity: 0.8; }
.docs-search {
  margin-left: auto;
  position: relative;
  width: min(280px, 30vw);
}
.docs-search input {
  width: 100%;
  padding: 7px 36px 7px 12px;
  border: 1px solid rgba(205, 127, 50, 0.35);
  border-radius: 8px;
  background: rgba(255, 251, 240, 0.08);
  color: var(--cream);
  font-size: 13px;
  font-family: inherit;
}
.docs-search input::placeholder { color: rgba(255, 251, 240, 0.45); }
.docs-search input:focus {
  outline: none;
  background: rgba(255, 251, 240, 0.12);
  border-color: var(--bronze);
}
.docs-search kbd {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 11px;
  font-family: inherit;
  color: rgba(255, 251, 240, 0.45);
  background: rgba(205, 127, 50, 0.15);
  border: 1px solid rgba(205, 127, 50, 0.25);
  border-radius: 4px;
  padding: 1px 5px;
}
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--cream);
  padding: 8px;
  cursor: pointer;
  margin-left: auto;
}
.mobile-menu-btn svg { width: 20px; height: 20px; }

/* ── Layout shell ── */
.docs-shell {
  display: flex;
  padding-top: var(--header-h);
  min-height: 100vh;
}

/* ── Left sidebar ── */
.docs-sidebar {
  position: fixed;
  top: var(--header-h);
  left: 0;
  width: var(--sidebar-w);
  height: calc(100vh - var(--header-h));
  background: var(--sidebar-bg);
  border-right: 1px solid var(--sidebar-border);
  overflow-y: auto;
  padding: 20px 12px 40px;
  z-index: 100;
  transition: transform 0.25s ease;
}
.docs-sidebar-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-light);
  padding: 0 12px 10px;
}
.docs-nav-item {
  display: block;
  padding: 7px 12px;
  border-radius: 6px;
  font-size: 13.5px;
  color: var(--text-muted);
  text-decoration: none;
  transition: background 0.12s, color 0.12s;
  line-height: 1.4;
}
.docs-nav-item:hover { color: var(--text); background: rgba(205, 127, 50, 0.08); }
.docs-nav-item.is-active {
  background: var(--white);
  color: var(--brown);
  font-weight: 500;
  box-shadow: 0 1px 2px rgba(43, 26, 8, 0.08);
  border-left: 2px solid var(--bronze);
  padding-left: 10px;
}
.docs-nav-item.search-match {
  color: var(--brown);
  font-weight: 500;
}
.docs-nav-sub {
  padding-left: 12px;
  margin-top: 2px;
}
.docs-nav-sub .docs-nav-item {
  font-size: 13px;
  padding: 5px 12px;
}
.docs-sidebar-footer {
  margin-top: 32px;
  padding: 12px;
  font-size: 11px;
  color: var(--text-light);
  border-top: 1px solid var(--sidebar-border);
}

/* ── Main content ── */
.docs-main {
  flex: 1;
  margin-left: var(--sidebar-w);
  margin-right: var(--toc-w);
  padding: 40px 48px 80px;
  max-width: calc(var(--content-max) + 96px);
  background: var(--cream);
}
.docs-page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.docs-page-header h1 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin: 0 0 12px;
  color: var(--text);
}
.docs-subtitle {
  font-size: 16px;
  color: var(--text-muted);
  margin: 0;
  line-height: 1.55;
  font-style: italic;
}

/* ── Content typography ── */
.docs-content h2 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 48px 0 16px;
  padding-top: 8px;
  scroll-margin-top: calc(var(--header-h) + 24px);
  color: var(--text);
}
.docs-content h2:first-child { margin-top: 0; }
.docs-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin: 28px 0 12px;
  scroll-margin-top: calc(var(--header-h) + 24px);
  color: var(--text);
}
.docs-content p { margin: 0 0 16px; }
.docs-content ul, .docs-content ol {
  margin: 0 0 16px;
  padding-left: 24px;
}
.docs-content li { margin-bottom: 6px; }
.docs-content li::marker { color: var(--text-muted); }
.docs-content strong { font-weight: 600; }
.docs-content a {
  color: var(--bronze-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}
.docs-content a:hover { color: var(--bronze); }
.docs-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}
.docs-content em { color: var(--text-muted); }

/* ── Tables ── */
.docs-table-wrap {
  overflow-x: auto;
  margin: 0 0 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
}
.docs-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}
.docs-content th {
  text-align: left;
  padding: 10px 14px;
  background: var(--sidebar-bg);
  font-weight: 600;
  font-size: 13px;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
.docs-content td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.docs-content tr:last-child td { border-bottom: none; }
.docs-content tr:hover td { background: rgba(0,0,0,0.015); }

/* ── Code ── */
.docs-content code {
  font-family: var(--mono);
  font-size: 0.88em;
  background: var(--inline-code-bg);
  padding: 2px 6px;
  border-radius: 4px;
  color: #C0352B;
}
.docs-content pre {
  margin: 0 0 16px;
  padding: 16px 18px;
  background: var(--code-bg);
  border: 1px solid var(--code-border);
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
  line-height: 1.55;
}
.docs-content pre code {
  background: none;
  padding: 0;
  color: var(--text);
  font-size: inherit;
}
.code-block-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  margin: 20px 0 6px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* ── Mermaid ── */
.mermaid-wrap {
  margin: 20px 0 24px;
  padding: 24px;
  background: var(--sidebar-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow-x: auto;
}
.mermaid-wrap .mermaid { display: flex; justify-content: center; }

/* ── FAQ ── */
.faq-item { margin-bottom: 24px; }
.faq-item h3 {
  font-size: 15px;
  margin: 0 0 6px;
}
.faq-item p { margin: 0; color: var(--text-muted); font-size: 14.5px; }

/* ── Page footer nav ── */
.docs-page-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.docs-page-nav a {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: var(--text);
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: border-color 0.15s, background 0.15s;
  min-width: 160px;
}
.docs-page-nav a:hover { border-color: #C5CAD1; background: var(--sidebar-bg); }
.docs-page-nav .nav-label {
  font-size: 12px;
  color: var(--text-light);
  margin-bottom: 4px;
}
.docs-page-nav .nav-title {
  font-size: 14px;
  font-weight: 500;
}
.docs-page-nav .nav-next { margin-left: auto; text-align: right; }
.docs-updated {
  font-size: 13px;
  color: var(--text-light);
  margin-top: 32px;
  display: flex;
  align-items: center;
  gap: 6px;
}
.docs-updated svg { width: 14px; height: 14px; }

/* ── Right TOC ── */
.docs-toc {
  position: fixed;
  top: var(--header-h);
  right: 0;
  width: var(--toc-w);
  height: calc(100vh - var(--header-h));
  padding: 32px 16px 40px 0;
  overflow-y: auto;
  z-index: 50;
}
.docs-toc-inner {
  border-left: 2px solid var(--border);
  padding-left: 16px;
}
.docs-toc-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-light);
  margin-bottom: 12px;
  padding-left: 16px;
}
.docs-toc a {
  display: block;
  font-size: 12.5px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 4px 0 4px 16px;
  margin-left: -18px;
  border-left: 2px solid transparent;
  transition: color 0.12s, border-color 0.12s;
  line-height: 1.4;
}
.docs-toc a:hover { color: var(--text); }
.docs-toc a.is-active {
  color: var(--brown);
  font-weight: 500;
  border-left-color: var(--bronze);
}

/* ── Responsive ── */
@media (max-width: 1100px) {
  .docs-toc { display: none; }
  .docs-main { margin-right: 0; }
}
@media (max-width: 860px) {
  .docs-tabs { display: none; }
  .docs-search { display: none; }
  .mobile-menu-btn { display: block; }
  .docs-sidebar {
    transform: translateX(-100%);
  }
  .docs-sidebar.is-open {
    transform: translateX(0);
    box-shadow: 4px 0 24px rgba(0,0,0,0.12);
  }
  .docs-main {
    margin-left: 0;
    padding: 24px 20px 60px;
  }
  .docs-page-header h1 { font-size: 26px; }
}
@media (max-width: 480px) {
  .docs-page-nav { flex-direction: column; gap: 12px; }
  .docs-page-nav a { width: 100%; }
  .docs-page-nav .nav-next { margin-left: 0; text-align: left; }
}

/* ── Search highlight ── */
.search-hidden { display: none !important; }
.docs-search-empty {
  padding: 8px 12px;
  font-size: 13px;
  color: var(--text-light);
  font-style: italic;
}
.docs-nav-item.search-match:not(.is-active) {
  background: rgba(205, 127, 50, 0.12);
}
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.3);
  z-index: 99;
}
.sidebar-overlay.is-visible { display: block; }

/* ── Preview banner ── */
.preview-banner {
  position: fixed;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2000;
  background: var(--dark-warm);
  color: var(--cream);
  font-size: 12px;
  padding: 8px 16px;
  border-radius: 999px;
  display: flex;
  gap: 12px;
  align-items: center;
  box-shadow: 0 8px 24px rgba(18, 13, 4, 0.35);
  white-space: nowrap;
  border: 1px solid rgba(205, 127, 50, 0.3);
}
.preview-banner a { color: var(--bronze); font-weight: 600; text-decoration: none; }
.preview-banner span { opacity: 0.55; }