/* 스완 디자인 토큰: DESIGN.md가 원본. 값을 바꾸면 DESIGN.md도 함께 고칠 것 */
:root {
  --ground: #f4f6f9;     /* 공책 종이 */
  --paper: #ffffff;      /* 도구 박스 */
  --ink: #1b2a4a;        /* 볼펜 남색: 본문 */
  --muted: #56617a;      /* 보조 텍스트 (ground 대비 5.6:1) */
  --rule: #d8dee8;       /* 공책 줄 */
  --pen: #2246b8;        /* 파란 볼펜: 버튼, 링크 */
  --pen-dark: #18348c;
  --hl: #ffe45c;         /* 형광펜: 결과값 강조 전용 */
  --red: #c8322a;        /* 빨간펜: 경고, 감소 */
  --ok: #2c6e49;         /* 상태: 정상 */
  --warn: #9a5b00;       /* 상태: 주의 */
  --display: "Black Han Sans", "IBM Plex Sans KR", sans-serif;
  --body: "IBM Plex Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --dw: 400;             /* 제목 글꼴 굵기: 언어별 글꼴에 맞춰 build.mjs가 바꾼다 */

  /* 페이지 조각들이 쓰는 별칭 */
  --bg: var(--ground);
  --card: var(--paper);
  --line: var(--rule);
  --text: var(--ink);
  --accent: var(--pen);
  --good: var(--ok);
  --bad: var(--red);
  --day: #a05a00;
  --night: #33407a;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: var(--body);
  background: var(--ground);
  color: var(--ink);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
}
a { color: var(--pen); text-underline-offset: 3px; }
:focus-visible { outline: 3px solid var(--pen); outline-offset: 2px; }
.wrap { max-width: 880px; margin: 0 auto; padding: 0 16px; }

/* 상단 */
.top { background: var(--paper); border-bottom: 1px solid var(--rule); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 56px; }
.logo { font-family: var(--display); font-weight: var(--dw); font-size: 1.5rem; color: var(--ink); text-decoration: none; letter-spacing: -0.01em; }
.top nav { display: flex; align-items: center; gap: 12px; }
.top nav a { color: var(--muted); text-decoration: none; font-size: 0.92rem; white-space: nowrap; }
.top nav a:hover { color: var(--pen); }
.top select.lang { flex: none; padding: 5px 8px; font-size: 0.85rem; color: var(--muted); max-width: 132px; }

/* 브라우저 언어 안내 */
.langbar { display: flex; justify-content: center; align-items: center; gap: 8px; padding: 6px 16px; background: var(--ink); font-size: 0.9rem; }
.langbar[hidden] { display: none; }
.langbar a { color: #fff; font-weight: 600; }
.langbar button { background: none; border: none; color: #fff; padding: 2px 8px; font-weight: 400; }
.langbar button:hover { background: none; opacity: .7; }

/* 제목 */
main.wrap { padding-top: 32px; padding-bottom: 40px; }
h1 { font-family: var(--display); font-weight: var(--dw); font-size: 2.3rem; line-height: 1.2; margin: 0 0 8px; letter-spacing: -0.01em; }
.lead { color: var(--muted); margin: 0 0 18px; max-width: 60ch; }
h2 { font-size: 1.12rem; margin: 0 0 12px; }

/* 형광펜: 결과에만 쓴다 */
.mark, .big, .stat b {
  background: linear-gradient(transparent 58%, var(--hl) 58%, var(--hl) 92%, transparent 92%);
  -webkit-box-decoration-break: clone; box-decoration-break: clone;
  padding: 0 .12em;
}

/* 광고 */
.ad { display: flex; justify-content: center; margin: 20px 0; overflow: hidden; }
.ad img, .ad iframe { max-width: 100%; height: auto; }
/* 좌우 세로 광고: 본문(880px) 바깥 20px, 1200px 이상에서만 */
.side { display: none; position: fixed; top: 76px; width: 120px; height: 400px; overflow: hidden; }
.side-l { left: calc(50% - 440px - 20px - 120px); }
.side-r { right: calc(50% - 440px - 20px - 120px); }
@media (min-width: 1200px) { .side { display: block; } }
.ad-note { text-align: center; color: var(--muted); font-size: 0.75rem; margin-top: -10px; }

/* 도구 박스 */
.box { background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 20px; margin: 16px 0; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin: 10px 0; }
.row label { min-width: 96px; color: var(--muted); }
input, select, textarea, button {
  font: inherit; color: var(--ink); background: var(--paper);
  border: 1px solid #b9c2d3; border-radius: 6px; padding: 10px 12px;
}
input, select { min-width: 0; flex: 1 1 140px; }
input[type=checkbox] { accent-color: var(--pen); width: 18px; height: 18px; flex: none; vertical-align: -3px; }
textarea { width: 100%; min-height: 220px; resize: vertical; line-height: 1.7; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--pen); outline-offset: 0; border-color: var(--pen); }
button { background: var(--pen); color: #fff; font-weight: 700; border-color: var(--pen); cursor: pointer; }
button:hover { background: var(--pen-dark); border-color: var(--pen-dark); }
button:active { transform: translateY(1px); }
button.sub { background: var(--paper); color: var(--ink); border-color: #b9c2d3; font-weight: 600; }
button.sub:hover { border-color: var(--ink); background: var(--paper); }
.btns { display: flex; gap: 8px; flex-wrap: wrap; }

/* 결과 */
.result { margin-top: 14px; padding: 16px; border-top: 1px dashed var(--rule); font-size: 1.1rem; text-align: center; }
.big { font-family: var(--display); font-weight: var(--dw); font-size: 2.4rem; line-height: 1.3; color: var(--ink); font-variant-numeric: tabular-nums; display: inline; }
div.big { display: table; margin: 4px auto; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 0; margin-top: 14px; border-top: 1px solid var(--rule); }
.stat { padding: 12px 8px; text-align: center; border-bottom: 1px solid var(--rule); }
.stat b { display: table; margin: 0 auto; font-family: var(--display); font-weight: var(--dw); font-size: clamp(1.15rem, 4.5vw, 1.55rem); color: var(--ink); font-variant-numeric: tabular-nums; white-space: nowrap; }
.stat span { color: var(--muted); font-size: 0.85rem; }

table { width: 100%; border-collapse: collapse; font-size: 0.9rem; font-variant-numeric: tabular-nums; }
th, td { padding: 8px; border-bottom: 1px solid var(--rule); text-align: right; }
th { color: var(--muted); font-weight: 600; position: sticky; top: 0; background: var(--paper); }
th:first-child, td:first-child { text-align: center; }
.scroll { overflow-x: auto; max-height: 420px; overflow-y: auto; }

/* 설명 글 */
.info { color: var(--muted); font-size: 0.97rem; }
.info h2 { color: var(--ink); font-size: 1.1rem; margin: 28px 0 6px; }
.info ul { padding-left: 20px; }
.info b { color: var(--ink); }

/* 목차 (도구 목록) */
h2.cat { font-size: 1rem; color: var(--muted); font-weight: 600; margin: 30px 0 4px; padding-bottom: 6px; border-bottom: 2px solid var(--ink); }
.tools { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); column-gap: 28px; }
.tool { display: flex; align-items: baseline; gap: 10px; padding: 12px 2px; border-bottom: 1px solid var(--rule); text-decoration: none; color: var(--ink); }
.tool b { font-weight: 700; white-space: nowrap; }
.tool span { color: var(--muted); font-size: 0.88rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.tool:hover b { color: var(--pen); text-decoration: underline; text-underline-offset: 3px; }

/* 하단 */
footer { border-top: 1px solid var(--rule); background: var(--paper); padding: 24px 0 40px; color: var(--muted); font-size: 0.85rem; }
footer .links { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-bottom: 10px; }
footer .links b { color: var(--ink); width: 100%; font-size: 0.85rem; }
footer .links a { color: var(--muted); text-decoration: none; }
footer .links a:hover { color: var(--pen); text-decoration: underline; }

/* 블로그: 넓은 화면(본문 + 사이드바). 좌우 쿠팡 광고는 1360px 이상에서만 */
body.wide .wrap { max-width: 1080px; }
body.wide .side-l { left: calc(50% - 540px - 20px - 120px); }
body.wide .side-r { right: calc(50% - 540px - 20px - 120px); }
@media (min-width: 1200px) and (max-width: 1359px) { body.wide .side { display: none; } }
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 260px; gap: 40px; align-items: start; }
@media (max-width: 860px) { .layout { grid-template-columns: minmax(0, 1fr); gap: 8px; } }
.main-col { min-width: 0; }

.posts { list-style: none; margin: 0; padding: 0; }
.post-item { padding: 16px 2px; border-bottom: 1px solid var(--rule); }
.post-title { display: block; font-weight: 700; font-size: 1.12rem; line-height: 1.45; color: var(--ink); text-decoration: none; }
.post-title:hover { color: var(--pen); text-decoration: underline; }
.post-item p { margin: 4px 0 6px; color: var(--muted); font-size: 0.94rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.meta { color: var(--muted); font-size: 0.85rem; }
.meta a { color: var(--muted); }
a.more { display: inline-block; margin-top: 14px; font-weight: 600; }

.sidebar { display: flex; flex-direction: column; gap: 16px; }
.side-box { background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 14px 16px; }
.side-box h2 { font-size: 0.92rem; margin: 0 0 6px; padding-bottom: 6px; border-bottom: 2px solid var(--ink); }
.side-box ul { list-style: none; margin: 0; padding: 0; }
.side-box li { display: flex; justify-content: space-between; gap: 8px; padding: 6px 0; border-bottom: 1px solid var(--rule); font-size: 0.92rem; }
.side-box li:last-child { border-bottom: none; }
.side-box li a { color: var(--ink); text-decoration: none; }
.side-box li a:hover { color: var(--pen); text-decoration: underline; }
.side-box li span { color: var(--muted); font-variant-numeric: tabular-nums; }
.side-box a.more { margin-top: 6px; font-size: 0.88rem; }
.ad-side { position: sticky; top: 16px; margin: 0; }

.crumb { font-size: 0.88rem; color: var(--muted); margin-bottom: 8px; }
.crumb a { color: var(--muted); }
.post h1 { font-family: var(--body); font-weight: 700; font-size: 2rem; line-height: 1.35; letter-spacing: -0.02em; }
.toc { background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; padding: 14px 18px; margin: 20px 0; font-size: 0.94rem; }
.toc ol { margin: 6px 0 0; padding-left: 20px; }
.toc li { padding: 2px 0; }

/* 글 본문 */
.prose { font-size: 1.04rem; line-height: 1.85; overflow-wrap: break-word; }
.prose h2 { font-size: 1.4rem; line-height: 1.4; margin: 44px 0 12px; padding-bottom: 8px; border-bottom: 1px solid var(--rule); scroll-margin-top: 16px; }
.prose h3 { font-size: 1.15rem; margin: 30px 0 8px; scroll-margin-top: 16px; }
.prose h4 { font-size: 1rem; margin: 24px 0 6px; }
.prose p, .prose ul, .prose ol { margin: 0 0 18px; }
.prose ul, .prose ol { padding-left: 22px; }
.prose li { margin: 4px 0; }
.prose strong { color: var(--ink); }
.prose img { display: block; max-width: 100%; height: auto; border-radius: 8px; margin: 20px auto; }
.prose blockquote { margin: 0 0 18px; padding: 12px 16px; background: var(--paper); border-left: 4px solid var(--pen); color: var(--muted); }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose code { font-family: ui-monospace, Consolas, monospace; font-size: 0.9em; background: #e9edf3; padding: 1px 5px; border-radius: 4px; }
.prose pre { background: var(--ink); color: #fff; padding: 14px 16px; border-radius: 8px; overflow-x: auto; }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose hr { border: none; border-top: 1px dashed var(--rule); margin: 32px 0; }
.prose .scroll { margin: 0 0 18px; max-height: none; background: var(--paper); border: 1px solid var(--rule); border-radius: 8px; }
.prose table { font-size: 0.92rem; }
.prose th, .prose td { text-align: left; }
.prose th:first-child, .prose td:first-child { text-align: left; white-space: nowrap; }
.try { margin: 32px 0 8px; }
.try h2 { font-size: 1rem; }
.related { margin-top: 24px; }
.pager { display: flex; justify-content: space-between; align-items: center; margin-top: 20px; color: var(--muted); font-size: 0.92rem; }

@media (max-width: 520px) {
  .post h1 { font-size: 1.6rem; }
  .prose h2 { font-size: 1.25rem; }
  h1 { font-size: 1.9rem; }
  .big { font-size: 2rem; }
  .row label { min-width: 100%; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
}