:root {
  --bg: #6b2d3c;
  --bg-soft: #5a2432;
  --cream: #f5ece4;
  --rose: #e8c4aa;
  --muted: rgba(245, 236, 228, 0.78);
  --card: rgba(255, 255, 255, 0.06);
  --line: rgba(245, 236, 228, 0.16);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(232, 196, 170, 0.14), transparent 45%),
    radial-gradient(ellipse at 85% 80%, rgba(0, 0, 0, 0.25), transparent 50%),
    linear-gradient(160deg, var(--bg), var(--bg-soft));
  color: var(--cream);
  font-family:
    "Apple SD Gothic Neo",
    "Hiragino Sans",
    "Hiragino Kaku Gothic ProN",
    "Noto Sans JP",
    "Noto Sans KR",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    sans-serif;
  line-height: 1.65;
}

.wrap {
  width: min(760px, calc(100% - 2.5rem));
  margin: 0 auto;
  padding: 3.5rem 0 5rem;
}

.brand {
  margin: 0 0 0.75rem;
  letter-spacing: 0.08em;
  text-transform: none;
  color: var(--rose);
  font-size: 0.95rem;
  font-weight: 600;
}

h1 {
  margin: 0 0 1rem;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1.25;
  font-weight: 700;
}

h2 {
  margin: 2.25rem 0 0.75rem;
  font-size: 1.2rem;
  color: var(--rose);
}

h3 {
  margin: 1.1rem 0 0.45rem;
  font-size: 1.02rem;
  font-weight: 650;
  color: var(--cream);
}

.card h3:first-child {
  margin-top: 0;
}

.card p + p,
.card p + ul,
.card ul + p,
.card h3 + p {
  margin-top: 0.75rem;
}

ol {
  padding-left: 1.2rem;
}

.lead,
.muted {
  color: var(--muted);
}

.links {
  display: grid;
  gap: 0.75rem;
  margin-top: 2rem;
}

.links a,
.back {
  display: block;
  padding: 0.95rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--card);
  color: var(--cream);
  text-decoration: none;
  transition: background 0.15s ease, border-color 0.15s ease;
}

.links a:hover,
.back:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(232, 196, 170, 0.45);
}

.card {
  margin-top: 1.5rem;
  padding: 1.25rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--card);
}

ul {
  padding-left: 1.2rem;
}

li + li {
  margin-top: 0.4rem;
}

a.inline {
  color: var(--rose);
}

.lang {
  display: flex;
  gap: 0.6rem;
  margin: 1.25rem 0 0;
}

.lang a {
  color: var(--rose);
  text-decoration: none;
  font-size: 0.92rem;
}

.section-en {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.footer {
  margin-top: 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

.back {
  display: inline-block;
  margin-top: 2rem;
  width: fit-content;
}