:root {
  color-scheme: dark;
  --ink: #14100f;
  --paper: #f4ecdc;
  --paper-soft: #e8dcc7;
  --gold: #efb945;
  --vermillion: #bd3329;
  --muted: #b9aa94;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--paper);
  background:
    radial-gradient(circle at 18% 8%, rgba(189, 51, 41, 0.18), transparent 30rem),
    linear-gradient(145deg, #1c1715 0%, var(--ink) 58%, #0b0909 100%);
  font-family: "Hiragino Mincho ProN", "Yu Mincho", "Noto Serif JP", serif;
  line-height: 1.8;
}

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

.shell {
  width: min(880px, calc(100% - 32px));
  margin: 0 auto;
  padding: 56px 0 72px;
}

.brand {
  margin-bottom: 34px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--gold);
  font-size: 0.82rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 8vw, 4.3rem);
  line-height: 1.12;
  letter-spacing: 0.04em;
}

.slash {
  display: inline-block;
  color: var(--vermillion);
  transform: rotate(-5deg);
}

.tagline {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.card {
  margin-top: 24px;
  padding: clamp(24px, 5vw, 46px);
  color: #2a211d;
  background:
    linear-gradient(rgba(244, 236, 220, 0.96), rgba(232, 220, 199, 0.96)),
    repeating-linear-gradient(0deg, transparent 0 4px, rgba(60, 44, 35, 0.025) 4px 5px);
  border: 1px solid rgba(239, 185, 69, 0.35);
  border-radius: 8px;
  box-shadow: 0 22px 65px rgba(0, 0, 0, 0.38);
}

h2 {
  margin: 2.2rem 0 0.65rem;
  font-size: 1.35rem;
  line-height: 1.4;
}

h2:first-child {
  margin-top: 0;
}

p,
ul {
  margin: 0.65rem 0;
}

ul {
  padding-left: 1.4rem;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.nav a {
  padding: 9px 15px;
  color: var(--paper);
  text-decoration: none;
  border: 1px solid rgba(239, 185, 69, 0.48);
  border-radius: 999px;
}

.nav a:hover {
  color: var(--ink);
  background: var(--gold);
}

.stamp {
  display: inline-grid;
  width: 58px;
  height: 58px;
  margin-top: 22px;
  place-items: center;
  color: var(--vermillion);
  border: 3px double var(--vermillion);
  font-weight: 700;
  line-height: 1.1;
  text-align: center;
  transform: rotate(-4deg);
}

footer {
  margin-top: 26px;
  color: var(--muted);
  font-size: 0.82rem;
}