:root {
  color-scheme: light;
  --bg: #f7f7f4;
  --panel: #ffffff;
  --text: #1f2428;
  --muted: #626b74;
  --line: #d8ddd8;
  --accent: #1f6f5b;
  --accent-dark: #13493d;
}

* {
  box-sizing: border-box;
}

html {
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
  background: var(--bg);
  color: var(--text);
}

body {
  margin: 0;
}

a {
  color: var(--accent-dark);
  text-underline-offset: 0.18em;
}

.site-header,
.site-footer {
  border-color: var(--line);
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.82);
}

.nav,
.content {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.brand {
  font-weight: 750;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.95rem;
}

.hero {
  padding: 64px 0 28px;
}

.hero h1,
.doc h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 3.5rem);
  line-height: 1.08;
}

.hero p {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.doc {
  padding: 46px 0 72px;
}

.doc-meta {
  margin-top: 14px;
  color: var(--muted);
}

.panel-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 32px 0 72px;
}

.panel {
  display: block;
  min-height: 160px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  text-decoration: none;
}

.panel h2 {
  margin: 0;
  font-size: 1.08rem;
}

.panel p {
  margin: 12px 0 0;
  color: var(--muted);
}

section {
  margin-top: 30px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.28rem;
  line-height: 1.25;
}

p,
li {
  color: var(--text);
}

ul {
  padding-left: 20px;
}

.notice {
  margin-top: 26px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fffdf5;
  color: #4d4632;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding: 22px 0;
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding-top: 42px;
  }

  .panel-grid {
    grid-template-columns: 1fr;
  }
}