:root {
  --bg: #f6f8ff;
  --surface: #ffffff;
  --text: #16203a;
  --muted: #56617a;
  --accent: #1c62ff;
  --accent-dark: #1449c2;
  --border: #dbe3ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 15% -10%, #d9e6ff 0, transparent 42%),
    radial-gradient(circle at 90% 5%, #d6f3ff 0, transparent 38%),
    var(--bg);
  line-height: 1.6;
}

.container {
  width: min(960px, 92vw);
  margin: 0 auto;
}

header {
  padding: 24px 0;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--text);
}

.nav-links {
  display: flex;
  gap: 16px;
}

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

main {
  padding: 18px 0 56px;
}

.hero {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 42px 28px;
  box-shadow: 0 12px 32px rgba(20, 73, 194, 0.08);
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
}

h2 {
  margin: 30px 0 12px;
}

p {
  margin: 0 0 14px;
  color: var(--muted);
}

.button {
  display: inline-block;
  margin-top: 10px;
  padding: 11px 18px;
  border-radius: 10px;
  border: none;
  text-decoration: none;
  font-weight: 700;
  background: var(--accent);
  color: #fff;
}

.button:hover {
  background: var(--accent-dark);
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 22px;
  margin-top: 18px;
}

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

footer {
  border-top: 1px solid var(--border);
  padding: 24px 0 36px;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  nav {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .hero {
    padding: 30px 20px;
  }
}