:root {
  color-scheme: light;
  --ink: #172039;
  --muted: #59647a;
  --brand: #3c4e9a;
  --brand-dark: #202d41;
  --accent: #ef9d53;
  --paper: #f6f5f0;
  --card: #ffffff;
  --line: #dedfe7;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

main, footer {
  width: min(960px, calc(100% - 40px));
  margin: 0 auto;
}

.hero { padding: 88px 0 64px; }

.mark {
  display: grid;
  grid-template-columns: 1fr 1fr;
  width: 72px;
  height: 72px;
  overflow: hidden;
  border-radius: 20px;
  color: white;
  background: linear-gradient(145deg, var(--brand), var(--brand-dark));
  box-shadow: 0 14px 30px rgb(32 45 65 / 24%);
  font-family: "Hiragino Sans", "Yu Gothic", sans-serif;
  font-size: 24px;
  font-weight: 700;
}

.mark span {
  display: grid;
  place-items: center;
}

.mark span:last-child { background: rgb(255 255 255 / 12%); }

.eyebrow {
  margin: 28px 0 8px;
  color: var(--brand);
  font-weight: 750;
  letter-spacing: .08em;
  text-transform: uppercase;
}

h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.03;
  letter-spacing: -.04em;
}

.lead {
  max-width: 720px;
  margin-top: 28px;
  color: var(--muted);
  font-size: clamp(20px, 3vw, 26px);
}

section { padding: 28px 0 48px; }
h2 { font-size: 30px; letter-spacing: -.02em; }
h3 { margin-top: 0; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

article, .privacy-note {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--card);
}

.privacy-note { border-left: 6px solid var(--accent); }

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

.button {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  color: white;
  background: var(--brand);
  font-weight: 700;
  text-decoration: none;
}

footer {
  padding: 40px 0 64px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

@media (max-width: 680px) {
  .hero { padding-top: 56px; }
  .grid { grid-template-columns: 1fr; }
}