:root {
  color-scheme: light;
  --bg: #ffffff;
  --text: #1d1d1f;
  --muted: #5f6673;
  --line: #e6e8ec;
  --accent: #2563eb;
  --accent-soft: #eff6ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
}

.site {
  max-width: 880px;
  margin: 0 auto;
  padding: 32px 22px 48px;
}

header {
  padding: 28px 0 18px;
  border-bottom: 1px solid var(--line);
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 32px;
}

nav a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
}

nav a:hover {
  text-decoration: underline;
}

.hero {
  padding: 56px 0 42px;
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.subtitle {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: clamp(1.2rem, 3vw, 1.65rem);
  font-weight: 600;
}

.lead {
  max-width: 720px;
  margin: 0;
  font-size: 1.18rem;
}

main {
  padding: 28px 0;
}

section {
  padding: 18px 0;
}

h2 {
  margin: 0 0 14px;
  font-size: 1.45rem;
  line-height: 1.25;
}

h3 {
  margin: 22px 0 8px;
  font-size: 1.08rem;
}

p {
  margin: 0 0 16px;
}

ul,
ol {
  padding-left: 1.35rem;
  margin: 0 0 18px;
}

li {
  margin: 6px 0;
}

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

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

.button {
  display: inline-block;
  padding: 10px 14px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
  font-weight: 700;
}

.button:hover {
  text-decoration: underline;
}

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

footer {
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .site {
    padding: 24px 18px 40px;
  }

  .hero {
    padding: 38px 0 30px;
  }

  .lead {
    font-size: 1.05rem;
  }
}