:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --text: #182230;
  --muted: #667085;
  --line: #d9e2ec;
  --blue: #1169aa;
  --blue-dark: #0b4b7c;
  --green: #0f7a5b;
  --code: #101828;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--bg);
  color: var(--text);
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  margin: 0;
  min-height: 100vh;
}

.sidebar {
  background: #0f172a;
  color: #f8fafc;
  display: flex;
  flex-direction: column;
  gap: 22px;
  height: 100vh;
  left: 0;
  overflow-y: auto;
  padding: 24px;
  position: sticky;
  top: 0;
}

.brand {
  display: grid;
  gap: 3px;
}

.brand span {
  color: #8fd3ff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand strong {
  font-size: 1.35rem;
}

.guide-switcher {
  background: #172033;
  border: 1px solid #334155;
  border-radius: 8px;
  display: grid;
  gap: 4px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  padding: 4px;
}

.guide-switcher button {
  background: transparent;
  border: 0;
  border-radius: 6px;
  color: #cbd5e1;
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  font-weight: 800;
  min-height: 34px;
}

.guide-switcher button.active {
  background: #dbeafe;
  color: #0b4b7c;
}

.search {
  display: grid;
  gap: 8px;
}

.search span {
  color: #cbd5e1;
  font-size: 0.78rem;
  font-weight: 700;
}

.search input {
  background: #172033;
  border: 1px solid #334155;
  border-radius: 8px;
  color: #ffffff;
  font: inherit;
  padding: 10px 12px;
  width: 100%;
}

.toc {
  display: grid;
  gap: 4px;
}

.toc a {
  border-radius: 6px;
  color: #dbeafe;
  font-size: 0.9rem;
  line-height: 1.35;
  padding: 8px 10px;
  text-decoration: none;
}

.toc a:hover {
  background: #1e293b;
}

.toc a.level-3 {
  color: #cbd5e1;
  font-size: 0.82rem;
  padding-left: 22px;
}

.content-shell {
  display: grid;
  gap: 22px;
  padding: 32px;
}

.hero {
  align-items: flex-end;
  background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
  border: 1px solid var(--line);
  border-radius: 8px;
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px;
}

.eyebrow {
  color: var(--blue);
  display: block;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  margin-bottom: 8px;
  text-transform: uppercase;
}

.hero h1 {
  font-size: 2rem;
  line-height: 1.15;
  margin: 0;
}

.hero p {
  color: var(--muted);
  margin: 8px 0 0;
}

.source-link {
  align-items: center;
  background: var(--blue);
  border-radius: 8px;
  color: #ffffff;
  display: inline-flex;
  font-weight: 800;
  min-height: 40px;
  padding: 10px 14px;
  text-decoration: none;
  white-space: nowrap;
}

.guide,
.empty-state {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 30px;
}

.guide section {
  border-top: 1px solid var(--line);
  padding-top: 22px;
}

.guide section:first-child {
  border-top: 0;
  padding-top: 0;
}

.guide h1,
.guide h2,
.guide h3 {
  line-height: 1.25;
  margin: 0 0 12px;
}

.guide h1 {
  font-size: 2rem;
}

.guide h2 {
  color: var(--blue-dark);
  font-size: 1.45rem;
  margin-top: 24px;
}

.guide h3 {
  color: var(--green);
  font-size: 1.08rem;
  margin-top: 20px;
}

.guide p,
.guide li {
  color: #344054;
  line-height: 1.65;
}

.guide pre {
  background: var(--code);
  border-radius: 8px;
  color: #f8fafc;
  overflow-x: auto;
  padding: 14px 16px;
}

.guide code {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.9em;
}

.guide p code,
.guide li code {
  background: #eef2f6;
  border-radius: 5px;
  color: #101828;
  padding: 2px 5px;
}

.guide table {
  border-collapse: collapse;
  margin: 16px 0 22px;
  width: 100%;
}

.guide th,
.guide td {
  border: 1px solid var(--line);
  line-height: 1.45;
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.guide th {
  background: #edf4fb;
  color: #102a43;
}

.guide blockquote {
  border-left: 4px solid var(--blue);
  color: var(--muted);
  margin: 18px 0;
  padding-left: 14px;
}

.flowchart-svg {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 18px 0 24px;
  overflow-x: auto;
  padding: 18px;
}

.flowchart-svg svg {
  color: #475467;
  display: block;
  height: auto;
  min-width: 640px;
}

.flowchart-svg text {
  fill: currentColor;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

.flowchart-svg .th {
  font-size: 14px;
  font-weight: 700;
}

.flowchart-svg .ts {
  font-size: 12px;
  font-weight: 500;
}

.flowchart-svg .arr {
  fill: none;
  stroke: #667085;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.5;
}

.flowchart-svg marker path {
  stroke: #667085;
}

.flowchart-svg rect {
  stroke: currentColor;
}

.flowchart-svg .node rect {
  fill: #ffffff;
}

.flowchart-svg .c-gray {
  color: #667085;
}

.flowchart-svg .c-gray rect {
  fill: #f2f4f7;
}

.flowchart-svg .c-purple {
  color: #6941c6;
}

.flowchart-svg .c-purple rect {
  fill: #f4f3ff;
}

.flowchart-svg .c-teal {
  color: #0f766e;
}

.flowchart-svg .c-teal rect {
  fill: #e6fffb;
}

.flowchart-svg .c-blue {
  color: #1169aa;
}

.flowchart-svg .c-blue rect {
  fill: #eef6ff;
}

.flowchart-svg .c-amber {
  color: #b54708;
}

.flowchart-svg .c-amber rect {
  fill: #fff7e6;
}

.flowchart-svg .c-red {
  color: #b42318;
}

.flowchart-svg .c-red rect {
  fill: #fff1f0;
}

.flowchart-svg .c-green {
  color: #087443;
}

.flowchart-svg .c-green rect {
  fill: #edfcf2;
}

.flowchart-svg .c-coral {
  color: #c4320a;
}

.flowchart-svg .c-coral rect {
  fill: #fff4ed;
}

.highlight {
  background: #fff2b8;
  border-radius: 3px;
  color: #111827;
  padding: 0 2px;
}

@media (max-width: 900px) {
  body {
    display: block;
  }

  .sidebar {
    height: auto;
    position: static;
  }

  .content-shell {
    padding: 18px;
  }

  .hero {
    align-items: flex-start;
    flex-direction: column;
  }

  .flowchart-svg svg {
    min-width: 600px;
  }
}