:root {
  color-scheme: light;
  --bg: #f7f8fb;
  --surface: #ffffff;
  --surface-strong: #eef2f7;
  --text: #172033;
  --muted: #5b677a;
  --border: #d7dee9;
  --accent: #0f766e;
  --accent-strong: #115e59;
  --accent-soft: #d9f3ef;
  --code-bg: #e9edf5;
  --warning-bg: #fff7ed;
  --warning-border: #fed7aa;
  --shadow: 0 18px 44px rgba(20, 32, 51, 0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f172a;
  --surface: #172033;
  --surface-strong: #202b43;
  --text: #edf3fb;
  --muted: #abb8ca;
  --border: #33415c;
  --accent: #5eead4;
  --accent-strong: #99f6e4;
  --accent-soft: #123b3a;
  --code-bg: #25324b;
  --warning-bg: #362313;
  --warning-border: #9a5a20;
  --shadow: 0 18px 44px rgba(0, 0, 0, 0.28);
}

* {
  box-sizing: border-box;
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
}

a {
  color: var(--accent-strong);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 0.14em;
}

code {
  border-radius: 6px;
  padding: 2px 5px;
  background: var(--code-bg);
  font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
  font-size: 0.92em;
}

:not(pre) > code {
  overflow-wrap: anywhere;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: 12px;
  z-index: 20;
  transform: translateY(-150%);
  padding: 10px 14px;
  border-radius: 6px;
  color: var(--text);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 92%, transparent);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  max-width: 1160px;
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border-radius: 8px;
  color: #ffffff;
  background: var(--accent-strong);
  font-size: 0.9rem;
}

:root[data-theme="dark"] .brand-mark {
  color: #062220;
  background: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.95rem;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
}

.nav-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle,
.mobile-menu summary,
.button {
  display: inline-flex;
  min-height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 13px;
  color: var(--text);
  background: var(--surface);
  cursor: pointer;
  font: inherit;
  font-weight: 650;
  text-decoration: none;
  text-align: center;
}

.theme-toggle {
  gap: 8px;
}

.mobile-menu {
  position: relative;
  display: none;
}

.mobile-menu summary {
  list-style: none;
}

.mobile-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-panel {
  position: absolute;
  right: 0;
  top: calc(100% + 8px);
  display: grid;
  min-width: 220px;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.mobile-panel a {
  border-radius: 6px;
  padding: 9px 10px;
  color: var(--text);
  text-decoration: none;
}

.mobile-panel a:hover,
.mobile-panel a[aria-current="page"] {
  background: var(--surface-strong);
}

.page-main {
  max-width: 1160px;
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.95fr);
  gap: 36px;
  align-items: center;
}

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

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent-strong);
  font-size: 0.88rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.15;
}

h1 {
  max-width: 760px;
  font-size: clamp(2.35rem, 5vw, 4.6rem);
}

h2 {
  font-size: clamp(1.55rem, 3vw, 2.3rem);
}

h3 {
  font-size: 1.08rem;
}

p {
  margin: 0;
}

.lede {
  max-width: 720px;
  margin-top: 22px;
  color: var(--muted);
  font-size: 1.15rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

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

:root[data-theme="dark"] .button.primary {
  color: #062220;
  background: var(--accent);
}

.button:hover {
  border-color: var(--accent);
}

.panel,
.card,
.signal,
.doc-card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  min-width: 0;
}

.panel {
  padding: 22px;
  box-shadow: var(--shadow);
}

.signal-grid,
.card-grid {
  display: grid;
  gap: 14px;
  margin-top: 24px;
}

.signal-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card-grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card-grid.three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.signal,
.card,
.doc-card {
  padding: 18px;
}

.signal strong,
.card strong,
.doc-card strong {
  display: block;
  margin-bottom: 6px;
}

.signal span,
.card p,
.doc-card p,
.muted {
  color: var(--muted);
}

.section {
  margin-top: 72px;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}

.section-heading p {
  max-width: 600px;
  color: var(--muted);
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.code-block {
  overflow-x: auto;
  max-width: 100%;
  border-radius: 8px;
  margin: 14px 0 0;
  padding: 16px;
  background: var(--code-bg);
  color: var(--text);
  font-size: 0.92rem;
  white-space: pre;
}

.diagram-wrap {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.architecture-svg {
  display: block;
  width: 100%;
  height: auto;
}

.architecture-mobile {
  display: none;
}

.architecture-mobile-grid {
  display: grid;
  gap: 12px;
  padding: 18px;
}

.mobile-node {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  background: var(--surface-strong);
}

.mobile-node strong {
  display: block;
  margin-bottom: 4px;
}

.mobile-node span {
  color: var(--muted);
  font-size: 0.94rem;
}

.mobile-connector {
  color: var(--accent-strong);
  font-weight: 800;
  text-align: center;
}

.box {
  fill: var(--surface-strong);
  stroke: var(--border);
  stroke-width: 1.4;
}

.box-accent {
  fill: var(--accent-soft);
  stroke: var(--accent);
  stroke-width: 1.6;
}

.diagram-text {
  fill: var(--text);
  font-size: 15px;
  font-weight: 700;
}

.diagram-muted {
  fill: var(--muted);
  font-size: 12px;
  font-weight: 500;
}

.arrow {
  fill: none;
  stroke: var(--accent-strong);
  stroke-width: 2.2;
  marker-end: url("#arrowhead");
}

.guide-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.guide-sidebar {
  position: sticky;
  top: 84px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  background: var(--surface);
}

.guide-sidebar h2 {
  margin-bottom: 12px;
  font-size: 1rem;
}

.guide-nav {
  display: grid;
  gap: 4px;
}

.guide-nav a {
  border-radius: 6px;
  padding: 8px 10px;
  color: var(--muted);
  text-decoration: none;
}

.guide-nav a:hover,
.guide-nav a[aria-current="page"] {
  color: var(--text);
  background: var(--surface-strong);
}

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

.guide-header {
  margin-bottom: 30px;
}

.guide-header h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
}

.guide-header .lede {
  max-width: 820px;
}

.doc-section {
  margin-top: 42px;
}

.doc-section > h2 {
  margin-bottom: 16px;
}

.doc-section > h3 {
  margin-top: 24px;
  margin-bottom: 10px;
}

.doc-section p,
.doc-section li {
  color: var(--muted);
}

.doc-section p + p,
.doc-section p + ul,
.doc-section p + ol,
.doc-section ul + p,
.doc-section ol + p {
  margin-top: 12px;
}

.doc-section ul,
.doc-section ol {
  margin: 10px 0 0;
  padding-left: 22px;
}

.callout {
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 8px;
  margin-top: 16px;
  padding: 16px;
  background: var(--surface);
}

.callout.warning {
  border-color: var(--warning-border);
  border-left-color: var(--warning-border);
  background: var(--warning-bg);
}

.table-wrap {
  overflow-x: auto;
  margin-top: 16px;
  border: 1px solid var(--border);
  border-radius: 8px;
}

table {
  width: 100%;
  min-width: 720px;
  border-collapse: collapse;
  background: var(--surface);
}

th,
td {
  border-bottom: 1px solid var(--border);
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--text);
  background: var(--surface-strong);
}

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

.pagination {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.site-footer {
  border-top: 1px solid var(--border);
  color: var(--muted);
  background: var(--surface);
}

.footer-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 24px;
  font-size: 0.95rem;
}

@media (max-width: 980px) {
  .hero,
  .two-column,
  .guide-shell {
    grid-template-columns: 1fr;
  }

  .guide-sidebar {
    position: static;
  }

  .signal-grid,
  .card-grid.three {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .nav {
    padding: 12px 18px;
  }

  .nav-links {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .guide-sidebar {
    display: none;
  }

  .page-main {
    padding: 38px 18px 56px;
  }

  .signal-grid,
  .card-grid.two,
  .card-grid.three {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .pagination {
    display: grid;
  }

  .architecture-svg {
    display: none;
  }

  .architecture-mobile {
    display: block;
  }

  .theme-toggle {
    min-width: 44px;
  }

  .theme-label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }
}