:root {
  --ink: #494652;
  --subtle: #77717d;
  --line: #e9dfd8;
  --paper: #fff9f5;
  --white: #ffffff;
  --pink: #f57f9b;
  --pink-soft: #ffe4eb;
  --mint: #d8f4ee;
  --mint-ink: #287969;
}

* { box-sizing: border-box; }

html { background: var(--paper); }

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background:
    radial-gradient(circle at 97% 7%, #fff0b4 0 58px, transparent 59px),
    radial-gradient(circle at 2% 29%, #d8f4ee 0 85px, transparent 86px),
    var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
}

a { color: inherit; }

.site-shell { width: min(100% - 40px, 760px); margin: 0 auto; }

.hero { padding: 86px 0 48px; }

.eyebrow {
  margin: 0 0 12px;
  color: #8765ac;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.13em;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  margin-bottom: 20px;
  font-size: clamp(2.1rem, 8vw, 3.7rem);
  line-height: 1.24;
  letter-spacing: -0.05em;
}

.hero-copy { max-width: 560px; margin-bottom: 0; color: var(--subtle); font-size: 1rem; }

.cards { display: grid; gap: 16px; padding-bottom: 56px; }

.info-card {
  position: relative;
  display: block;
  overflow: hidden;
  min-height: 170px;
  padding: 28px 76px 26px 28px;
  border: 1px solid var(--line);
  border-radius: 26px;
  text-decoration: none;
  box-shadow: 0 9px 24px rgba(111, 79, 64, 0.08);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.info-card:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(111, 79, 64, 0.13); }
.info-card:focus-visible { outline: 3px solid #7361d5; outline-offset: 3px; }
.pink { background: var(--pink-soft); }
.mint { background: var(--mint); }

.card-number { display: block; margin-bottom: 9px; font-size: 0.77rem; font-weight: 800; letter-spacing: .11em; color: #a36d8f; }
.mint .card-number { color: #5c978c; }
.info-card h2 { margin-bottom: 2px; font-size: 1.45rem; line-height: 1.35; }
.info-card p { margin-bottom: 0; color: var(--subtle); font-size: .95rem; }
.arrow { position: absolute; right: 28px; top: 50%; transform: translateY(-50%); color: var(--pink); font-size: 2rem; }
.mint .arrow { color: var(--mint-ink); }

.page-header { padding: 44px 0 24px; }
.back-link { color: var(--pink); font-weight: 750; text-decoration: none; }
.back-link:hover { text-decoration: underline; }
.page-header h1 { margin: 26px 0 0; font-size: clamp(2rem, 7vw, 3rem); }

.document {
  margin: 0 auto 56px;
  padding: clamp(24px, 6vw, 44px);
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255,255,255,.85);
  box-shadow: 0 9px 24px rgba(111, 79, 64, 0.06);
}

.document h2 { margin: 38px 0 10px; font-size: 1.22rem; line-height: 1.45; }
.document h2:first-of-type { margin-top: 0; }
.document h3 { margin: 28px 0 8px; font-size: 1.05rem; }
.document p, .document li { font-size: .96rem; }
.document ul { padding-left: 1.25em; }
.document li + li { margin-top: 5px; }
.notice { padding: 16px 18px; border-radius: 14px; background: #fff5d8; font-size: .92rem; }
.contact-box { margin-top: 28px; padding: 20px; border-radius: 16px; background: var(--mint); }
.contact-box p:last-child { margin-bottom: 0; }
.email-placeholder { font-weight: 750; color: var(--mint-ink); }

footer { padding: 22px; border-top: 1px solid var(--line); color: var(--subtle); text-align: center; font-size: .78rem; }

@media (max-width: 480px) {
  .site-shell { width: min(100% - 32px, 760px); }
  .hero { padding-top: 62px; }
  .info-card { min-height: 150px; padding-left: 22px; }
  .arrow { right: 22px; }
}