:root {
  color-scheme: light dark;
  --bg: #f6f8f8;
  --surface: #ffffff;
  --text: #182324;
  --muted: #667273;
  --line: #dce4e4;
  --accent: #006064;
  --accent-strong: #004d50;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}

a {
  color: var(--accent);
}

.site-header,
.site-footer {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-weight: 700;
  color: var(--text);
  text-decoration: none;
}

nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 14px;
}

main {
  max-width: 960px;
  margin: 0 auto;
  padding: 24px;
}

.hero {
  padding: 64px 0 44px;
  border-bottom: 1px solid var(--line);
}

.eyebrow {
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  margin: 0 0 10px;
}

h1 {
  font-size: clamp(36px, 7vw, 64px);
  line-height: 1.04;
  letter-spacing: 0;
  margin: 0 0 18px;
}

h2 {
  font-size: 24px;
  margin: 0 0 14px;
}

h3 {
  font-size: 18px;
  margin: 0 0 8px;
}

p {
  margin: 0 0 14px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 20px;
}

.actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 26px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--accent);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 650;
}

.button.primary {
  background: var(--accent);
  color: #fff;
}

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

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin: 34px 0;
}

.card,
.content {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
}

.content {
  max-width: 780px;
}

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

ul {
  padding-left: 22px;
}

li {
  margin: 8px 0;
}

.site-footer {
  color: var(--muted);
  font-size: 14px;
  border-top: 1px solid var(--line);
}

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

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

  .hero {
    padding-top: 32px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101516;
    --surface: #172021;
    --text: #eef4f4;
    --muted: #a7b3b4;
    --line: #2a3839;
    --accent: #5fc9c9;
    --accent-strong: #8adada;
  }
}