:root {
  color-scheme: light;
  --bg: #eef2f7;
  --panel: rgba(255, 255, 255, 0.92);
  --panel-strong: #ffffff;
  --text: #152033;
  --muted: #50627a;
  --accent: #2366d1;
  --accent-soft: rgba(35, 102, 209, 0.12);
  --border: rgba(21, 32, 51, 0.09);
  --shadow: 0 18px 48px rgba(18, 35, 66, 0.12);
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(35, 102, 209, 0.16), transparent 34%),
    linear-gradient(180deg, #f8fafc 0%, var(--bg) 100%);
}

.shell {
  width: min(960px, calc(100% - 32px));
  margin: 0 auto;
  padding: 72px 0 80px;
}

.hero {
  padding: 40px;
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.96), rgba(244, 248, 255, 0.9));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  line-height: 1.1;
}

h1 {
  font-size: clamp(2.2rem, 6vw, 4rem);
}

.lead {
  max-width: 62ch;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.card,
.detail {
  padding: 26px;
  border-radius: 24px;
  background: var(--panel);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(10px);
}

.card h2,
.detail h2 {
  font-size: 1.1rem;
}

.card p,
.detail li {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.detail {
  margin-top: 22px;
  background: var(--panel-strong);
}

.detail ul {
  padding-left: 18px;
  margin: 10px 0 0;
}

@media (max-width: 640px) {
  .shell {
    padding: 32px 0 48px;
  }

  .hero,
  .card,
  .detail {
    padding: 22px;
    border-radius: 22px;
  }
}