:root {
  --background: #fbfaf7;
  --surface: #ffffff;
  --text: #18211d;
  --muted: #5f6f66;
  --line: #dfe6df;
  --accent: #275b46;
  --accent-soft: #e6f0ea;
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  color: var(--text);
  background: var(--background);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

body {
  margin: 0;
}

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

.site-header,
.site-footer,
.site-main {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.045em;
  text-decoration: none;
}

.brand-name {
  font-size: clamp(1.625rem, 3vw, 2.25rem);
}

.brand-mark {
  display: block;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.95rem;
}

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

.site-nav a:hover {
  color: var(--accent);
}

.hero {
  padding: 88px 0 72px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.1;
}

h1 {
  max-width: 1080px;
  margin: 0;
  font-size: clamp(2.75rem, 7.2vw, 6.1rem);
  letter-spacing: -0.045em;
}

h2 {
  margin-top: 0;
  font-size: clamp(2rem, 4vw, 3.5rem);
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 8px;
  font-size: 1.2rem;
}

.lede {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.15rem, 2vw, 1.45rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  background: transparent;
  color: var(--accent);
}

.section {
  padding: 64px 0;
  border-top: 1px solid var(--line);
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--surface);
}

.card p {
  color: var(--muted);
}

.page {
  max-width: 820px;
  padding: 64px 0 96px;
}

.page-header {
  margin-bottom: 40px;
}

.content {
  font-size: 1.08rem;
}

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

.content h2 {
  margin-top: 48px;
  font-size: 2rem;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

.site-footer p {
  margin: 0;
}

.github-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f0f2ef;
  color: #4f5b54;
  font-weight: 700;
  text-decoration: none;
}

.github-link:hover {
  background: #e7ebe7;
  color: var(--text);
}

.github-link svg {
  flex: 0 0 auto;
  fill: currentColor;
}

@media (max-width: 780px) {
  .site-header,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .hero {
    padding-top: 48px;
  }
}