:root {
  color-scheme: light;
  --bg: #f7f8f4;
  --surface: #ffffff;
  --text: #17251b;
  --muted: #5f6b62;
  --green: #1a2f21;
  --green-soft: #e7f1e7;
  --accent: #4caf50;
  --line: #dfe5dd;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--green);
  font-weight: 650;
}

.shell {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.84);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
}

.brand {
  text-decoration: none;
  color: var(--text);
  font-size: 20px;
  font-weight: 800;
}

.links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 15px;
}

.hero {
  padding: 72px 0 56px;
  text-align: center;
}

.hero-icon {
  width: 128px;
  height: 128px;
  margin-bottom: 28px;
  border-radius: 30px;
  box-shadow: 0 18px 44px rgba(23, 37, 27, 0.18);
}

.hero h1 {
  margin: 0 auto 16px;
  max-width: 720px;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 0.98;
  letter-spacing: 0;
}

.lead {
  margin: 0 auto;
  max-width: 680px;
  color: var(--muted);
  font-size: 20px;
}

.panel {
  margin: 28px 0;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

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

.item {
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.item h2,
.panel h2,
main h2 {
  margin: 0 0 10px;
  font-size: 22px;
}

.item p,
.panel p {
  margin: 0;
  color: var(--muted);
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 28px;
  padding: 0 18px;
  border-radius: 8px;
  background: var(--green);
  color: #ffffff;
  text-decoration: none;
}

main {
  padding: 48px 0 64px;
}

main h1 {
  margin: 0 0 18px;
  font-size: 42px;
  line-height: 1.05;
  letter-spacing: 0;
}

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

section {
  margin-top: 34px;
}

footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 720px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 18px 0;
  }

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

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