:root {
  color-scheme: light;
  --ink: #17233f;
  --muted: #64708a;
  --paper: #f7f5ee;
  --panel: rgba(255, 255, 255, 0.86);
  --accent: #e98b37;
  --indigo: #25345d;
  --line: rgba(37, 52, 93, 0.14);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at top right, rgba(233, 139, 55, 0.18), transparent 32rem),
    linear-gradient(150deg, #f8f5ed 0%, #eef2f8 100%);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
}

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

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

header {
  padding: 72px 0 34px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.mark {
  width: 64px;
  height: 64px;
  border-radius: 18px;
  object-fit: cover;
  box-shadow: 0 14px 36px rgba(37, 52, 93, 0.22);
}

h1,
h2 {
  margin: 0;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(34px, 6vw, 52px);
}

h2 {
  margin-bottom: 12px;
  font-size: 22px;
}

.subtitle {
  max-width: 680px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin: 18px 0;
}

.panel {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--panel);
  box-shadow: 0 16px 40px rgba(37, 52, 93, 0.08);
}

main {
  display: grid;
  gap: 18px;
  padding-bottom: 48px;
}

ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

.note {
  border-left: 4px solid var(--accent);
}

footer {
  padding: 0 0 44px;
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 560px) {
  header {
    padding-top: 44px;
  }

  .panel {
    padding: 18px;
  }
}