:root {
  --topbar-h: 56px;
  --sidebar-w: 320px;
  --radius: 8px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.18);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.35);
  --font-ui: "Inter", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 150ms var(--ease);
}

html[data-theme="dark"] {
  --bg-page: #1a1a1a;
  --bg-topbar: rgba(36, 36, 36, 0.9);
  --bg-sidebar: #1e1e1e;
  --bg-surface: #252525;
  --bg-surface-soft: rgba(255, 255, 255, 0.04);
  --bg-hover: rgba(255, 255, 255, 0.06);
  --bg-active: rgba(225, 29, 72, 0.14);
  --bg-hero: radial-gradient(circle at top left, rgba(225, 29, 72, 0.22), transparent 38%), linear-gradient(180deg, #252525 0%, #1e1e1e 100%);
  --text-primary: #f3f4f6;
  --text-secondary: #c0c4cc;
  --text-tertiary: #8b9098;
  --border-color: rgba(255, 255, 255, 0.08);
  --border-subtle: rgba(255, 255, 255, 0.05);
  --accent: #e11d48;
  --accent-hover: #f43f5e;
  --accent-strong: #fb7185;
  --success-soft: rgba(34, 197, 94, 0.14);
  --warning-soft: rgba(245, 158, 11, 0.14);
  --scrollbar-thumb: rgba(255, 255, 255, 0.12);
  color-scheme: dark;
}

html[data-theme="light"] {
  --bg-page: #ffffff;
  --bg-topbar: rgba(255, 255, 255, 0.9);
  --bg-sidebar: #f7f7f8;
  --bg-surface: #ffffff;
  --bg-surface-soft: rgba(0, 0, 0, 0.03);
  --bg-hover: rgba(0, 0, 0, 0.04);
  --bg-active: rgba(225, 29, 72, 0.09);
  --bg-hero: radial-gradient(circle at top left, rgba(225, 29, 72, 0.15), transparent 38%), linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  --text-primary: #111827;
  --text-secondary: #4b5563;
  --text-tertiary: #6b7280;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-subtle: rgba(0, 0, 0, 0.04);
  --accent: #e11d48;
  --accent-hover: #be123c;
  --accent-strong: #be123c;
  --success-soft: rgba(34, 197, 94, 0.1);
  --warning-soft: rgba(245, 158, 11, 0.12);
  --scrollbar-thumb: rgba(0, 0, 0, 0.12);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.14);
  color-scheme: light;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-ui);
  background: var(--bg-page);
  color: var(--text-primary);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input {
  font: inherit;
}

code,
pre,
kbd {
  font-family: var(--font-mono);
}

kbd {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 20px;
  height: 20px;
  padding: 0 5px;
  border: 1px solid var(--border-color);
  border-bottom-width: 2px;
  border-radius: 5px;
  background: var(--bg-surface-soft);
  color: var(--text-secondary);
  font-size: 11px;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: 8px;
  height: var(--topbar-h);
  padding: 0 20px;
  border-bottom: 1px solid var(--border-color);
  background: var(--bg-topbar);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 16px;
  font-weight: 800;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.brand-logo {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 7px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 900;
}

.brand-divider {
  width: 1px;
  height: 24px;
  background: var(--border-color);
  margin: 0 4px;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius);
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

.nav-pill svg,
.iconbtn svg,
.search-icon {
  width: 16px;
  height: 16px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: 4px;
}

.nav a {
  padding: 6px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.nav a:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.spacer {
  flex: 1;
}

.iconbtn {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.iconbtn:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.mobile-menu-btn,
.sidebar-close {
  display: none;
}

.docs-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
}

.sidebar {
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  border-right: 1px solid var(--border-color);
  background: var(--bg-sidebar);
}

.sidebar-panel {
  display: flex;
  height: 100%;
  flex-direction: column;
}

.sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 18px 14px;
  border-bottom: 1px solid var(--border-color);
}

.sidebar-kicker,
.section-kicker,
.sidebar-group-title,
.mini-label {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 11px;
  font-weight: 700;
  color: var(--text-tertiary);
}

.sidebar-title {
  margin: 6px 0 0;
  font-size: 15px;
  font-weight: 600;
}

.sidebar-search-wrapper {
  padding: 14px 16px;
}

.sidebar-search-btn {
  display: flex;
  width: 100%;
  height: 38px;
  align-items: center;
  gap: 8px;
  padding: 0 12px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  background: var(--bg-surface-soft);
  color: var(--text-tertiary);
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.sidebar-search-btn:hover {
  background: var(--bg-hover);
  color: var(--text-secondary);
}

.sidebar-search-btn .hint {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 4px 12px 24px;
  scrollbar-width: thin;
  scrollbar-color: var(--scrollbar-thumb) transparent;
}

.sidebar-nav::-webkit-scrollbar,
.results::-webkit-scrollbar {
  width: 6px;
}

.sidebar-nav::-webkit-scrollbar-thumb,
.results::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
}

.sidebar-group + .sidebar-group {
  margin-top: 20px;
}

.sidebar-group-title {
  margin: 0 10px 10px;
}

.sidebar-link {
  display: flex;
  padding: 8px 10px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.sidebar-link:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-link[aria-current="true"] {
  background: var(--bg-active);
  color: var(--accent-strong);
}

.sidebar-subnav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin: 6px 0 10px 16px;
  padding-left: 12px;
  border-left: 1px solid var(--border-subtle);
}

.sidebar-sublink {
  display: flex;
  padding: 5px 8px;
  border-radius: 8px;
  color: var(--text-tertiary);
  font-size: 12px;
  font-weight: 500;
  transition: background var(--transition), color var(--transition);
}

.sidebar-sublink:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.sidebar-backdrop {
  display: none;
}

.content {
  min-width: 0;
}

.content-inner {
  width: min(100%, 1040px);
  margin: 0 auto;
  padding: 36px clamp(20px, 4vw, 44px) 72px;
}

.doc-section {
  scroll-margin-top: 88px;
}

.doc-section + .doc-section {
  margin-top: 64px;
}

.hero {
  padding: clamp(28px, 4vw, 40px);
  border: 1px solid var(--border-color);
  border-radius: 22px;
  background: var(--bg-hero);
  box-shadow: var(--shadow-sm);
}

.hero h1,
.section-heading h2 {
  margin: 8px 0 0;
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.hero h1 {
  max-width: 14ch;
  font-size: clamp(2.4rem, 6vw, 4.5rem);
}

.hero-copy,
.section-lead {
  max-width: 72ch;
  margin: 16px 0 0;
  color: var(--text-secondary);
  font-size: 1.03rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 16px;
  border-radius: 999px;
  border: 1px solid var(--border-color);
  font-weight: 600;
  transition: transform var(--transition), background var(--transition), color var(--transition), border-color var(--transition);
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  border-color: transparent;
  background: var(--accent);
  color: #fff;
}

.button.primary:hover {
  background: var(--accent-hover);
}

.button.secondary {
  background: var(--bg-surface);
}

.button.secondary:hover {
  background: var(--bg-hover);
}

.stat-grid,
.card-grid {
  display: grid;
  gap: 16px;
  margin-top: 24px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
}

.card-grid.two-col {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.method-grid {
  display: grid;
  gap: 16px;
  margin-top: 22px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.mini-card,
.info-card,
.method-detail,
.timeline-card,
.note,
.warning,
.code-block {
  border: 1px solid var(--border-color);
  border-radius: 18px;
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}

.mini-card,
.info-card,
.method-detail,
.timeline-card {
  padding: 18px;
}

.mini-card strong {
  display: block;
  margin-top: 8px;
  font-size: 1.02rem;
}

.mini-card p,
.info-card p,
.info-card li,
.method-detail p,
.method-detail li,
.timeline-card li,
.note,
.warning,
.footer p {
  color: var(--text-secondary);
  line-height: 1.65;
}

.info-card h3,
.method-detail h3,
.timeline-card h3 {
  margin: 0 0 10px;
  font-size: 1.02rem;
}

.method-detail ul {
  margin: 10px 0 0;
  padding-left: 18px;
}

.method-detail code {
  font-size: 0.95em;
}

.section-heading h2 {
  font-size: clamp(1.85rem, 4vw, 2.7rem);
}

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

.info-card ul,
.step-list {
  margin: 0;
  padding-left: 18px;
}

.info-card li + li,
.step-list li + li {
  margin-top: 8px;
}

.phase-strip,
.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.phase-strip {
  margin-top: 18px;
}

.phase-strip span,
.pill-row span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border-color);
  border-radius: 999px;
  background: var(--bg-surface);
  color: var(--text-primary);
  font-size: 14px;
  font-weight: 600;
}

.phase-strip.compact span {
  min-height: 32px;
  font-size: 13px;
}

.pill-row {
  margin-top: 18px;
}

.doc-table {
  width: 100%;
  margin-top: 22px;
  border-collapse: collapse;
  overflow: hidden;
  border: 1px solid var(--border-color);
  border-radius: 18px;
  background: var(--bg-surface);
  box-shadow: var(--shadow-sm);
}

.doc-table th,
.doc-table td {
  padding: 14px 16px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border-subtle);
  line-height: 1.6;
}

.doc-table th {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-secondary);
  background: var(--bg-surface-soft);
}

.doc-table tr:last-child td {
  border-bottom: 0;
}

.code-block {
  margin-top: 20px;
  overflow-x: auto;
}

.code-block pre {
  margin: 0;
  padding: 18px 20px;
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.75;
}

.code-inline {
  display: block;
  padding: 12px 14px;
  border-radius: 12px;
  background: var(--bg-surface-soft);
  color: var(--text-primary);
  font-size: 13px;
  line-height: 1.6;
  word-break: break-word;
}

.method-detail[id] {
  scroll-margin-top: 88px;
}

.note,
.warning {
  margin-top: 20px;
  padding: 16px 18px;
}

.note {
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--success-soft) 100%);
}

.warning {
  background: linear-gradient(180deg, var(--bg-surface) 0%, var(--warning-soft) 100%);
}

.footer {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--border-color);
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 1200;
  display: none;
}

.modal.open {
  display: block;
}

.backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.56);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.dialog {
  position: absolute;
  top: 14%;
  left: 50%;
  width: min(720px, calc(100vw - 24px));
  transform: translateX(-50%);
  overflow: hidden;
  border: 1px solid var(--border-color);
  border-radius: 20px;
  background: var(--bg-surface);
  box-shadow: var(--shadow-lg);
}

.searchrow {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border-color);
}

.searchrow input {
  flex: 1;
  min-width: 0;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--text-primary);
  font-size: 15px;
}

.searchrow input::placeholder {
  color: var(--text-tertiary);
}

.closebtn {
  height: 28px;
  padding: 0 10px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: var(--bg-surface-soft);
  color: var(--text-secondary);
  cursor: pointer;
}

.results {
  max-height: 420px;
  overflow-y: auto;
}

.result-item,
.result-empty {
  border: 0;
  background: transparent;
}

.result-item {
  display: flex;
  width: 100%;
  gap: 14px;
  padding: 14px 16px;
  border-top: 1px solid var(--border-subtle);
  color: inherit;
  text-align: left;
  cursor: pointer;
}

.result-item:hover,
.result-item.active {
  background: var(--bg-hover);
}

.result-item.active {
  background: var(--bg-active);
}

.result-icon {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 10px;
  background: var(--bg-surface-soft);
  color: var(--accent-strong);
  font-size: 11px;
  font-weight: 700;
}

.result-content {
  min-width: 0;
}

.result-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}

.result-meta,
.result-snippet {
  margin-top: 4px;
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.55;
}

.result-empty {
  padding: 36px 16px;
  text-align: center;
  color: var(--text-tertiary);
}

.footerhint {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 12px 16px;
  border-top: 1px solid var(--border-color);
  color: var(--text-tertiary);
  font-size: 12px;
}

.hint-group {
  display: flex;
  align-items: center;
  gap: 4px;
}

body.modal-open,
body.sidebar-open {
  overflow: hidden;
}

@media (max-width: 1024px) {
  .docs-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: fixed;
    top: var(--topbar-h);
    bottom: 0;
    left: 0;
    z-index: 1100;
    width: min(88vw, 340px);
    transform: translateX(-100%);
    transition: transform 180ms var(--ease);
    box-shadow: var(--shadow-lg);
  }

  body.sidebar-open .sidebar {
    transform: translateX(0);
  }

  .sidebar-backdrop {
    position: fixed;
    inset: var(--topbar-h) 0 0 0;
    z-index: 1090;
    display: block;
    visibility: hidden;
    opacity: 0;
    background: rgba(0, 0, 0, 0.4);
    transition: opacity 180ms var(--ease), visibility 180ms var(--ease);
  }

  body.sidebar-open .sidebar-backdrop {
    visibility: visible;
    opacity: 1;
  }

  .mobile-menu-btn,
  .sidebar-close {
    display: grid;
  }
}

@media (max-width: 820px) {
  .nav,
  .brand-divider {
    display: none;
  }

  .content-inner {
    padding: 24px 16px 56px;
  }

  .hero h1 {
    max-width: 100%;
  }
}

@media (max-width: 560px) {
  .topbar {
    padding: 0 12px;
  }

  .nav-pill {
    display: none;
  }

  .hero,
  .mini-card,
  .info-card,
  .timeline-card,
  .code-block,
  .note,
  .warning,
  .doc-table {
    border-radius: 16px;
  }

  .dialog {
    top: 10%;
  }

  .searchrow {
    padding: 12px;
  }
}