/* 시험지 지우개: 사이트 공통(머리말·꼬리말) + 글 페이지(.site) */
:root {
  --s-bg: #f2f5f6; --s-surface: #ffffff; --s-ink: #1b242a; --s-muted: #5a6872; --s-line: #d7dfe3;
  --s-accent: #1d5b78; --s-accent-ink: #ffffff; --s-soft: #e2eef4; --s-todo: #fff1b8;
  --s-display: "Nanum Myeongjo", "AppleMyungjo", "Batang", serif;
  --s-body: "IBM Plex Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) { --s-bg: #11171b; --s-surface: #182026; --s-ink: #e5ebee; --s-muted: #9aa8b1; --s-line: #2a343b; --s-accent: #72b6d6; --s-accent-ink: #0d1a21; --s-soft: #1d2f39; --s-todo: #5a4a10; color-scheme: dark; }
}
:root[data-theme="dark"] { --s-bg: #11171b; --s-surface: #182026; --s-ink: #e5ebee; --s-muted: #9aa8b1; --s-line: #2a343b; --s-accent: #72b6d6; --s-accent-ink: #0d1a21; --s-soft: #1d2f39; --s-todo: #5a4a10; color-scheme: dark; }

/* 모든 페이지 공통: 브라우저 기본 여백 제거 (도구 페이지와 글 페이지 폭을 같게) */
html, body { margin: 0; }

/* 머리말 */
.site-header { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 8px 20px; padding-block: 4px 12px; border-bottom: 1px solid var(--s-line); font-family: var(--s-body); }
.site-brand { display: block; line-height: 0; text-decoration: none; }
.site-brand img { height: 40px; width: auto; display: block; }
.brand-hero { margin: 8px 0 20px; line-height: 0; }
.brand-hero img { width: min(100%, 520px); height: auto; }
.site-header nav { display: flex; flex-wrap: wrap; gap: 4px 16px; }
.site-header nav a { color: var(--s-muted); text-decoration: none; font-size: 14.5px; padding: 6px 0; border-bottom: 2px solid transparent; }
.site-header nav a:hover { color: var(--s-ink); }
.site-header nav a[aria-current="page"] { color: var(--s-accent); border-bottom-color: var(--s-accent); font-weight: 600; }

.site-header .lang-switch { border: 1px solid var(--s-line); border-radius: 999px; padding: 3px 12px; color: var(--s-ink); }
.site-header .lang-switch:hover { border-color: var(--s-accent); }

/* 언어 제안 배너 */
.lang-banner { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 14px; background: var(--s-soft); color: var(--s-ink); border: 1px solid var(--s-line); border-radius: 10px; padding: 10px 14px; margin: 0 auto 14px; max-width: 1280px; font-family: var(--s-body); font-size: 14.5px; }
.lang-banner span { flex: 1 1 220px; }
.lang-banner .lang-go { background: var(--s-accent); color: var(--s-accent-ink); text-decoration: none; font-weight: 600; padding: 6px 14px; border-radius: 8px; }
.lang-banner button { font: inherit; background: transparent; color: var(--s-muted); border: 1px solid var(--s-line); border-radius: 8px; padding: 6px 12px; cursor: pointer; }

/* 꼬리말 */
.site-footer { border-top: 1px solid var(--s-line); margin-top: 32px; padding-top: 16px; color: var(--s-muted); font-size: 13px; font-family: var(--s-body); display: grid; gap: 6px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 6px 18px; }
.site-footer a { color: var(--s-muted); }
.site-footer p { margin: 0; }

/* 앱 페이지 안내 영역 */
.site-intro { background: var(--s-surface); border: 1px solid var(--s-line); border-radius: 10px; padding: 18px 20px; display: grid; gap: 10px; font-family: var(--s-body); }
.site-intro h2 { font-family: var(--s-display); font-weight: 800; font-size: 20px; margin: 6px 0 0; }
.site-intro ol { margin: 0; padding-left: 22px; display: grid; gap: 6px; }
.site-intro ol strong { margin-right: 6px; }
.site-intro dl { margin: 0; display: grid; gap: 4px; }
.site-intro dt { font-weight: 600; margin-top: 8px; }
.site-intro dd { margin: 0; color: var(--s-muted); }
.site-intro .more { color: var(--s-muted); font-size: 14px; }
.site-intro a { color: var(--s-accent); }

/* 글 페이지 */
body.site {
  margin: 0; background: var(--s-bg); color: var(--s-ink); font-family: var(--s-body); font-size: 16.5px; line-height: 1.75;
  padding-left: max(16px, env(safe-area-inset-left, 0px)); padding-right: max(16px, env(safe-area-inset-right, 0px)); padding-block: 20px 40px;
}
/* 모든 페이지 폭을 시험지 지우기(1280px)에 맞춤. 글 본문 줄 길이는 문단별 68ch로 제한 */
body.site > * { max-width: 1280px; margin-left: auto; margin-right: auto; }
.doc { padding-top: 24px; }
.doc h1 { font-family: var(--s-display); font-weight: 800; font-size: clamp(28px, 5vw, 36px); line-height: 1.3; margin: 0 0 12px; text-wrap: balance; }
.doc h2 { font-family: var(--s-display); font-weight: 800; font-size: 22px; line-height: 1.4; margin: 36px 0 8px; text-wrap: balance; }
.doc h3 { font-size: 17px; margin: 24px 0 4px; }
.doc p, .doc li { max-width: 68ch; }
.doc .lead { font-size: 18px; color: var(--s-muted); }
.doc .crumb { margin: 0 0 6px; font-size: 14px; }
.doc .crumb a, .doc a { color: var(--s-accent); }
.doc .meta { color: var(--s-muted); font-size: 14px; }
.doc table { border-collapse: collapse; width: 100%; font-size: 15px; }
.doc .table { overflow-x: auto; }
.doc th, .doc td { border: 1px solid var(--s-line); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { background: var(--s-soft); }
.doc .tip { background: var(--s-soft); border-radius: 8px; padding: 12px 16px; }
.doc .next { margin-top: 40px; border-top: 1px solid var(--s-line); padding-top: 8px; }
.doc .cta { display: inline-block; background: var(--s-accent); color: var(--s-accent-ink); text-decoration: none; font-weight: 600; padding: 10px 18px; border-radius: 8px; }
.doc .table { max-width: 900px; }
.doc .cards { list-style: none; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr)); }
.doc .cards li { background: var(--s-surface); border: 1px solid var(--s-line); border-radius: 10px; padding: 14px 16px; max-width: none; }
.doc .cards p { margin: 4px 0 0; color: var(--s-muted); font-size: 15px; }
mark.todo { background: var(--s-todo); color: inherit; padding: 0 4px; border-radius: 3px; }
a:focus-visible { outline: 2px solid var(--s-accent); outline-offset: 2px; }