:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --surface: #ffffff;
  --text: #171c54;
  --muted: #898b8c;
  --primary: #2871ad;
  --border: #dde3ef;
  --shadow: 0 10px 28px rgba(23, 28, 84, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: linear-gradient(180deg, #edf0f8 0%, var(--bg) 30%, var(--bg) 100%);
}

.hero {
  padding: 4rem 1.25rem 2rem;
}

.hero__content {
  max-width: 860px;
  margin: 0 auto;
}

.eyebrow {
  margin: 0 0 0.25rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.82rem;
  color: var(--primary);
  font-weight: 700;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 5vw, 2.9rem);
  line-height: 1.15;
}

.lead {
  max-width: 70ch;
  margin-top: 1rem;
  color: var(--muted);
  font-size: 1.05rem;
}

.container {
  max-width: 860px;
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.2rem 1.3rem;
  box-shadow: var(--shadow);
}

h2 {
  margin-top: 0;
  margin-bottom: 0.5rem;
  font-size: 1.25rem;
}

ul {
  margin: 0.4rem 0 0;
  padding-left: 1.2rem;
}

.materials {
  display: grid;
  gap: 0.35rem;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover,
a:focus {
  text-decoration: underline;
}