:root {
  color-scheme: light;
  --bg: #ffffff;
  --canvas: #f6f8fa;
  --ink: #1f2328;
  --soft: #59636e;
  --muted: #6e7781;
  --line: #d8dee4;
  --line-soft: #eaeef2;
  --code: #f6f8fa;
  --blue: #0969da;
  --green: #1a7f37;
  --orange: #bc4c00;
  --purple: #8250df;
  --red: #cf222e;
  --shadow: 0 16px 48px rgba(31, 35, 40, 0.08);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, "Noto Sans KR", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: 0;
}

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

button,
input {
  font: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 28px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(18px);
}

.brand,
.topbar nav,
.hero-actions,
.card-head,
.sources,
.flow {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 800;
}

.mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: #24292f;
  color: #fff;
  font-size: 13px;
  font-weight: 900;
}

.topbar nav {
  gap: 8px;
}

.topbar nav a {
  min-height: 34px;
  padding: 8px 11px;
  border-radius: 6px;
  color: var(--soft);
  font-size: 14px;
  font-weight: 600;
}

.topbar nav a:hover {
  background: var(--canvas);
  color: var(--ink);
}

.layout {
  display: grid;
  grid-template-columns: 286px minmax(0, 1fr);
}

.sidebar {
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  padding: 24px 20px;
  border-right: 1px solid var(--line);
  background: #fff;
  overflow-y: auto;
}

.search-box {
  display: grid;
  gap: 8px;
  margin-bottom: 24px;
}

.search-box label {
  color: var(--soft);
  font-size: 13px;
  font-weight: 700;
}

.search-box input {
  width: 100%;
  height: 38px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  outline: none;
  background: var(--canvas);
  color: var(--ink);
}

.search-box input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.14);
}

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

.toc-link {
  display: block;
  padding: 8px 10px;
  border-radius: 6px;
  color: var(--soft);
  font-size: 14px;
  font-weight: 600;
}

.toc-link:hover,
.toc-link.active {
  background: var(--canvas);
  color: var(--ink);
}

main {
  min-width: 0;
  padding: 48px clamp(24px, 6vw, 88px) 80px;
}

.hero {
  max-width: 920px;
  padding: 44px 0 36px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
h4,
p {
  margin-top: 0;
  word-break: keep-all;
}

h1 {
  margin-bottom: 18px;
  font-size: clamp(42px, 6vw, 72px);
  line-height: 1.02;
  letter-spacing: 0;
  overflow-wrap: break-word;
}

h1 span {
  display: block;
}

.lede {
  max-width: 760px;
  margin-bottom: 26px;
  color: var(--soft);
  font-size: 19px;
  line-height: 1.65;
}

.hero-actions {
  gap: 10px;
  flex-wrap: wrap;
}

.primary,
.secondary {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 15px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 800;
}

.primary {
  background: #1f883d;
  color: #fff;
}

.secondary {
  border: 1px solid var(--line);
  background: var(--canvas);
  color: var(--ink);
}

.overview {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 28px 0 44px;
}

.overview article,
.agent-map,
.scout-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.overview article {
  padding: 18px;
}

.icon {
  display: block;
  width: 38px;
  height: 38px;
  margin-bottom: 14px;
  border-radius: 8px;
  background: var(--code);
}

.icon.protocol {
  background:
    linear-gradient(90deg, transparent 44%, rgba(255,255,255,.9) 44% 56%, transparent 56%),
    linear-gradient(135deg, var(--blue), var(--green));
}

.icon.research {
  background:
    radial-gradient(circle at 30% 30%, rgba(255,255,255,.8) 0 12%, transparent 13%),
    linear-gradient(135deg, var(--orange), var(--red));
}

.icon.product {
  background:
    linear-gradient(45deg, transparent 0 45%, rgba(255,255,255,.9) 46% 54%, transparent 55%),
    linear-gradient(135deg, var(--purple), var(--blue));
}

.overview h2 {
  margin-bottom: 8px;
  font-size: 18px;
}

.overview p,
.agent-map p,
.summary,
.doc-grid p,
.doc-grid li {
  color: var(--soft);
  line-height: 1.6;
}

.overview p {
  margin-bottom: 0;
  font-size: 14px;
}

.agent-map {
  display: grid;
  grid-template-columns: minmax(0, 360px) minmax(0, 1fr);
  gap: 26px;
  align-items: center;
  margin-bottom: 48px;
  padding: 22px;
  background: var(--canvas);
}

.agent-map h2 {
  margin-bottom: 0;
  font-size: 22px;
}

.flow {
  justify-content: space-between;
  gap: 8px;
  min-width: 0;
}

.flow span {
  position: relative;
  flex: 1 1 0;
  min-width: 0;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
  text-align: center;
}

.section-title {
  margin-bottom: 18px;
}

.section-title h2 {
  margin-bottom: 0;
  font-size: 28px;
}

.cards {
  display: grid;
  gap: 18px;
}

.scout-card {
  scroll-margin-top: 86px;
  padding: 24px;
  box-shadow: var(--shadow);
}

.card-head {
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 12px;
}

.meta {
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.scout-card h3 {
  margin-bottom: 0;
  font-size: 30px;
  letter-spacing: 0;
}

.status {
  flex: 0 0 auto;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--canvas);
  color: var(--soft);
  font-size: 12px;
  font-weight: 800;
}

.summary {
  margin-bottom: 20px;
  font-size: 16px;
}

.doc-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.doc-grid section {
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: 8px;
  background: #fff;
}

.doc-grid h4 {
  margin-bottom: 10px;
  font-size: 15px;
}

.doc-grid p,
.doc-grid ul {
  margin-bottom: 0;
}

.doc-grid ul {
  display: grid;
  gap: 8px;
  padding-left: 20px;
}

.doc-grid li {
  padding-left: 2px;
}

.sources {
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.sources a {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
}

.empty {
  padding: 24px;
  border: 1px dashed var(--line);
  border-radius: 8px;
  color: var(--muted);
}

@media (max-width: 920px) {
  .topbar {
    position: static;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .topbar nav {
    flex-wrap: wrap;
  }

  .layout {
    display: block;
  }

  .sidebar {
    position: static;
    width: 100vw;
    max-width: 100%;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  main {
    width: 100vw;
    max-width: 100%;
    padding: 30px 18px 56px;
  }

  .overview,
  .agent-map,
  .doc-grid {
    grid-template-columns: 1fr;
  }

  .flow {
    align-items: stretch;
    flex-direction: column;
  }

  h1 {
    font-size: 38px;
    line-height: 1.08;
  }
}

@media (max-width: 560px) {
  main {
    overflow-x: hidden;
  }

  h1,
  h2,
  h3,
  h4,
  p,
  li {
    overflow-wrap: anywhere;
    word-break: normal;
  }

  h1 {
    font-size: 31px;
  }

  .lede {
    font-size: 17px;
    line-height: 1.7;
  }

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

  .scout-card {
    padding: 18px;
  }

  .scout-card h3 {
    font-size: 26px;
  }
}