:root {
  --bg: #f6f8fc;
  --surface: #ffffff;
  --text: #1d2433;
  --muted: #5b6477;
  --accent: #4166f5;
  --accent-hover: #3254d5;
  --border: #dbe1ef;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  width: min(920px, 92%);
  margin: 0 auto;
}

.hero {
  background: linear-gradient(135deg, #2d4bc8, #4d6eff);
  color: #fff;
  padding: 64px 0 52px;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.82rem;
  opacity: 0.85;
}

h1 {
  margin: 10px 0 14px;
  font-size: clamp(1.8rem, 3.2vw, 2.6rem);
  line-height: 1.2;
}

.subtitle {
  margin: 0 0 24px;
  max-width: 680px;
  opacity: 0.95;
}

.cta {
  display: inline-block;
  text-decoration: none;
  color: #fff;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 10px;
  padding: 10px 16px;
  font-weight: 600;
}

.cta:hover {
  background: rgba(255, 255, 255, 0.28);
}

main {
  padding: 28px 0 34px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
  margin: 16px 0;
  box-shadow: 0 6px 18px rgba(30, 42, 73, 0.05);
}

h2 {
  margin: 0 0 12px;
  font-size: 1.25rem;
}

ul {
  margin: 0;
  padding-left: 18px;
}

li {
  margin-bottom: 10px;
}

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

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

details {
  border-top: 1px solid var(--border);
  padding: 10px 0;
}

details:first-of-type {
  border-top: 0;
}

summary {
  cursor: pointer;
  font-weight: 600;
}

details p {
  margin: 8px 0 2px;
  color: var(--muted);
}

.footer {
  padding: 22px 0 30px;
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .hero {
    padding: 52px 0 42px;
  }

  .card {
    padding: 16px;
  }
}