/* 안내 페이지와 404: 언덕과 같은 밤빛, 읽기 좋은 한 단 */
:root {
  --night: #05060b;
  --ink: #eceff7;
  --ink-1: #d9deea;
  --ink-2: #aeb5c8;
  --ink-3: #8a92a8;
  --rule: rgba(236, 239, 247, 0.1);
  --lantern: #ffc488;
  --lantern-ink: #1d1307;
  --serif: "Gowun Batang", "AppleMyungjo", "Nanum Myeongjo", serif;
  --sans: "Gowun Dodum", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
}
/* 일본어: Zen 글꼴, 일본어 줄바꿈(띄어쓰기가 없어서 keep-all을 풀어야 줄이 바뀐다) */
:root:lang(ja) {
  --serif: "Zen Old Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --sans: "Zen Maru Gothic", "Hiragino Sans", "Yu Gothic", sans-serif;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { background: var(--night); color: var(--ink); -webkit-text-size-adjust: 100%; }
body {
  margin: 0; min-height: 100dvh; font: 1rem/1.75 var(--sans); word-break: keep-all; -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(120% 60% at 50% 0%, rgba(26, 34, 66, 0.55), transparent 70%),
    var(--night);
}
:lang(ja) body { word-break: normal; line-break: strict; }
::selection { background: var(--lantern); color: var(--lantern-ink); }
:focus-visible { outline: 2px solid var(--lantern); outline-offset: 3px; border-radius: 4px; }
a { color: var(--ink); text-decoration-color: rgba(236, 239, 247, 0.4); text-underline-offset: 0.22em; }
a:hover { text-decoration-color: var(--ink); }

.page { max-width: 38rem; margin: 0 auto; padding: max(20px, env(safe-area-inset-top)) 20px max(40px, env(safe-area-inset-bottom)); }
.back {
  display: inline-flex; align-items: center; gap: 6px; min-height: 44px;
  color: var(--ink-2); font-size: 0.875rem; text-decoration: none;
}
.back:hover { color: var(--ink); }
h1 { margin: 28px 0 12px; font: 700 2rem/1.25 var(--serif); letter-spacing: -0.02em; text-wrap: balance; }
.lead { margin: 0 0 8px; color: var(--ink-1); font-size: 1.0625rem; text-wrap: pretty; }
section { margin-top: 44px; }
h2 { margin: 0 0 12px; font: 700 1.25rem/1.35 var(--serif); letter-spacing: -0.01em; }
h3 { margin: 22px 0 8px; font: 700 1.0625rem/1.45 var(--serif); }
p { margin: 0 0 12px; color: var(--ink-1); text-wrap: pretty; }
ul { margin: 0; padding-left: 1.1em; color: var(--ink-1); }
li { margin: 0 0 10px; padding-left: 0.2em; text-wrap: pretty; }
li::marker { color: var(--ink-3); }
.facts { margin: 0; border-top: 1px solid var(--rule); }
.facts dt { margin-top: 14px; color: var(--ink); font-weight: 700; font-size: 0.9375rem; }
.facts dd { margin: 4px 0 14px; padding-bottom: 14px; color: var(--ink-1); border-bottom: 1px solid var(--rule); }
.support {
  display: inline-flex; align-items: center; gap: 8px; min-height: 48px; padding: 0 22px; border-radius: 999px;
  background: rgba(236, 239, 247, 0.08); border: 1px solid rgba(236, 239, 247, 0.22);
  color: var(--ink); font-weight: 700; text-decoration: none;
}
.support:hover { background: rgba(236, 239, 247, 0.12); }
.note { color: var(--ink-3); font-size: 0.875rem; }
.formula { white-space: nowrap; font-variant-numeric: tabular-nums; }
.credits { color: var(--ink-2); font-size: 0.9375rem; }
/* 언어 고르기(안내 페이지 끝) */
.langs { display: flex; flex-wrap: wrap; gap: 4px 6px; margin-top: 48px; }
.langs a {
  display: inline-flex; align-items: center; min-height: 40px; padding: 0 12px; border-radius: 999px;
  color: var(--ink-3); font-size: 0.875rem; text-decoration: none;
}
.langs a:lang(ko) { font-family: "Gowun Dodum", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif; }
.langs a:lang(ja) { font-family: "Zen Maru Gothic", "Hiragino Sans", "Yu Gothic", sans-serif; }
.langs a:hover { color: var(--ink-1); }
.langs a[aria-current="true"] { color: var(--ink); background: rgba(236, 239, 247, 0.07); }
.langs + .foot { margin-top: 16px; }
.foot { margin-top: 56px; padding-top: 20px; border-top: 1px solid var(--rule); color: var(--ink-3); font-size: 0.8125rem; }

/* 404 */
.lost { min-height: 100dvh; display: grid; place-content: center; gap: 14px; padding: 24px; text-align: center; }
.lost h1 { margin: 0; }
.lost p { margin: 0 auto; max-width: 22rem; }
.lost a.home {
  justify-self: center; display: inline-flex; align-items: center; min-height: 48px; padding: 0 24px; margin-top: 8px;
  border-radius: 999px; background: var(--lantern); color: var(--lantern-ink); font: 700 0.9375rem/1 var(--serif); text-decoration: none;
}