/* SASO Dev Log — 검증 원장(ledger) design system
   종이 장부 위에 판정 도장을 찍는다.
   paper ground · Korean serif display · seal-stamp verdicts · ledger rules
   단일 라이트 테마 (종이 원장) — 다크 모드 없음 (2026-07-17 관리자 확정) */

:root{
  --paper:#f4efe3; --paper-raise:#faf6ec; --paper-sink:#ebe4d1;
  --ink:#1e2430; --ink-soft:#49505e; --faint:#6b655a;
  --rule:#d9d0bb; --rule-strong:#b3a78b;
  --seal:#b7352c; --seal-soft:#b7352c14;
  --live:#276843; --live-soft:#27684312;
  --maxw:44rem; --wide:52rem;
  --f-serif:"Noto Serif KR","Nanum Myeongjo",Batang,"Apple SD Gothic Neo",serif;
  --f-sans:"Pretendard Variable",Pretendard,-apple-system,BlinkMacSystemFont,"Segoe UI","Malgun Gothic","Apple SD Gothic Neo",sans-serif;
  --f-mono:ui-monospace,"SF Mono","Cascadia Code","JetBrains Mono",Consolas,"D2Coding",monospace;
  color-scheme:light;
}
*{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{ margin:0; background:var(--paper); color:var(--ink); font-family:var(--f-sans);
  font-size:17px; line-height:1.7; -webkit-font-smoothing:antialiased; letter-spacing:-0.003em;
  word-break:keep-all; overflow-wrap:break-word; }
.wrap{ max-width:var(--wide); margin:0 auto; padding:0 1.5rem; }
a{ color:inherit; touch-action:manipulation; }
img{ max-width:100%; height:auto; }
[id]{ scroll-margin-top:72px; }

/* skip link */
.skip{ position:absolute; left:-9999px; top:0; z-index:10; background:var(--seal); color:var(--paper-raise);
  font-size:.9rem; padding:.6em 1em; border-radius:0 0 4px 0; text-decoration:none; }
.skip:focus{ left:0; }

/* ── 원장 라벨 시스템 ─────────────────────────────── */
.eyebrow{ font-family:var(--f-mono); font-size:.72rem; letter-spacing:.14em; text-transform:uppercase;
  color:var(--faint); }

/* 도장(stamp) = 판정에만 쓴다: OPEN·MIT / LIVE / WIP */
.stamp{ font-family:var(--f-mono); font-size:.66rem; font-weight:600; letter-spacing:.12em;
  border:1.5px solid currentColor; border-radius:3px; padding:.3em .6em;
  transform:rotate(-2.5deg); white-space:nowrap; }
.stamp.open{ color:var(--seal); background:var(--seal-soft); }
.stamp.live{ color:var(--live); background:var(--live-soft); }
.stamp.wip{ color:var(--faint); border-style:dashed; background:transparent; }
.stamp.closed{ color:var(--ink-soft); background:var(--paper-sink); border-style:double; border-width:3px; }
.stamp.lg{ font-size:.75rem; padding:.45em .8em; transform:rotate(-4deg); }

/* chip = 메타데이터 (판정 아님 — 도장과 구분) */
.chip{ font-family:var(--f-mono); font-size:.68rem; letter-spacing:.06em; color:var(--faint);
  border:1px solid var(--rule); border-radius:2px; padding:.16em .5em; white-space:nowrap; }

/* ── header ──────────────────────────────────────── */
header.site{ position:sticky; top:0; z-index:5; background:color-mix(in srgb, var(--paper) 90%, transparent);
  backdrop-filter:blur(8px); border-bottom:3px double var(--rule-strong); }
header.site .row{ display:flex; align-items:center; justify-content:space-between; height:58px; }
.mark{ display:inline-flex; align-items:center; gap:.45em; text-decoration:none; }
.mark-logo{ height:34px; width:auto; display:block; transition:transform .18s ease; }
.mark:hover .mark-logo{ transform:scale(1.07); }
.mark .mk{ font-family:var(--f-mono); font-weight:600; font-size:.9rem; letter-spacing:.02em; }
nav.top{ display:flex; gap:1.6rem; }
nav.top a{ font-size:.9rem; color:var(--ink-soft); text-decoration:none; }
nav.top a:hover{ color:var(--seal); }

/* ── hero: 원장 표지 + 검증필 낙관 ───────────────── */
.hero{ padding:5.5rem 0 4.5rem; border-bottom:1px solid var(--rule); }
.hero .seal-big{ display:block; margin-bottom:1.4rem;
  animation:stampIn .45s cubic-bezier(.2,1.6,.4,1) both; }
@keyframes stampIn{
  from{ transform:rotate(-8deg) scale(1.5); opacity:0; }
  to{ transform:rotate(0) scale(1); opacity:1; }
}
.hero .eyebrow{ display:block; margin-bottom:1.5rem; }
.hero h1{ font-family:var(--f-serif); font-size:clamp(2.15rem,5.6vw,3.3rem); line-height:1.22;
  font-weight:700; letter-spacing:-0.015em; margin:0 0 1.4rem; text-wrap:balance; }
.hero h1 .u-seal{ color:var(--seal); }
.hero p.lead{ font-size:1.12rem; color:var(--ink-soft); max-width:var(--maxw); margin:0 0 2.1rem; }
.cta{ display:flex; gap:.9rem; flex-wrap:wrap; }
.btn{ font-size:.95rem; text-decoration:none; padding:.7em 1.3em; border-radius:3px; }
.btn.primary{ background:var(--ink); color:var(--paper); font-weight:600; }
.btn.primary:hover{ opacity:.88; }
.btn.ghost{ border:1px solid var(--rule-strong); color:var(--ink); }
.btn.ghost:hover{ border-color:var(--seal); color:var(--seal); }

/* ── section: 원장 구획 (이중 괘선 헤드) ─────────── */
section.block{ padding:3.6rem 0; border-bottom:1px solid var(--rule); }
.head{ display:flex; align-items:baseline; justify-content:space-between; gap:1rem;
  margin-bottom:1.6rem; padding-bottom:.7rem; border-bottom:3px double var(--rule-strong); }
.head h2{ font-size:.95rem; font-weight:700; letter-spacing:.02em; margin:0; }
.head .head-note{ font-family:var(--f-mono); font-size:.7rem; letter-spacing:.1em; color:var(--faint); }
/* 구획 헤드 우측 — 전체 보기로 넘어가는 화살표 */
.head .head-more{ font-family:var(--f-mono); font-size:.72rem; letter-spacing:.08em; color:var(--faint);
  text-decoration:none; white-space:nowrap; flex:none;
  border-bottom:1px solid transparent; transition:color .18s ease, border-color .18s ease; }
.head .head-more span{ display:inline-block; transition:transform .18s ease; }
.head .head-more:hover{ color:var(--seal); border-bottom-color:var(--seal); }
.head .head-more:hover span{ transform:translateX(3px); }

/* 대표작 — 검수 기록 행 */
ul.work{ list-style:none; margin:0; padding:0; }
ul.work li{ border-top:1px solid var(--rule); }
ul.work li:first-child{ border-top:none; }
ul.work li a.work-main{ display:grid; grid-template-columns:1fr auto; gap:.45rem 1rem; align-items:start;
  text-decoration:none; padding:1.2rem .6rem; margin:0 -.6rem;
  border-radius:4px; transition:background .18s ease; }
ul.work li a.work-main:hover{ background:var(--paper-raise); }
ul.work li a.work-main:hover .wt{ color:var(--seal); }
.wt{ font-family:var(--f-serif); font-size:1.22rem; font-weight:600; letter-spacing:-0.01em;
  grid-column:1; min-width:0; transition:color .18s; }
.wd{ grid-column:1; min-width:0; color:var(--faint); font-size:.95rem; }
ul.work li a.work-main .stamp{ grid-column:2; grid-row:1; align-self:center; }
/* 대표작 행 아래 플레이 버튼 줄 (게임만) */
ul.work li .play-row{ margin:-.3rem 0 1.2rem; }
/* 아카이브 행 — 운영 종료: 한 톤 낮춘다 */
ul.work li.archived .wt{ color:var(--ink-soft); }
ul.work li.archived a.work-main:hover .wt{ color:var(--seal); }

/* 플레이 버튼 줄 — 대표작·케이스 스터디·글 하단 카드 공용 */
.play-row{ display:flex; flex-wrap:wrap; align-items:center; gap:.6rem; }
.play-row .btn{ font-size:.88rem; padding:.55em 1.05em; }
.play-note{ font-size:.82rem; color:var(--faint); }

/* dev log — 번호 붙은 기록부 */
ul.log{ list-style:none; margin:0; padding:0; }
ul.log li a{ display:flex; gap:1.1rem; align-items:baseline; text-decoration:none; padding:.9rem 0;
  border-top:1px solid var(--rule); }
ul.log li:first-child a{ border-top:none; }
ul.log .no{ font-family:var(--f-mono); font-size:.78rem; color:var(--seal); flex:none; width:3.6rem;
  font-variant-numeric:tabular-nums; }
ul.log .date{ font-family:var(--f-mono); font-size:.78rem; color:var(--faint); flex:none; width:5.7rem;
  font-variant-numeric:tabular-nums; }
ul.log .lt{ color:var(--ink-soft); font-size:1rem; }
ul.log li a:hover .lt{ color:var(--ink); }
ul.log li a:hover .lt::after{ content:" →"; color:var(--seal); }
/* 고정(pin) 기록 — 날짜와 무관하게 항상 최상단 */
ul.log li.pinned .lt{ color:var(--ink); }
.pin-badge{ display:inline-flex; align-items:center; color:var(--seal);
  margin-right:.45em; vertical-align:-.05em; }
/* Dev Log 전체 페이지 */
.logpage{ padding-top:3rem; border-bottom:none; }
.logpage-intro{ color:var(--faint); font-size:.95rem; margin:-.6rem 0 1.6rem; }

/* ── case study (project) — 검수 카드 ────────────── */
.case{ padding:4rem 0; }
.case .cs{ max-width:var(--maxw); }
.case-top{ display:flex; align-items:flex-start; justify-content:space-between; gap:1rem; margin-bottom:1.1rem; }
.case h1{ font-family:var(--f-serif); font-size:clamp(1.8rem,4.4vw,2.5rem); line-height:1.28;
  letter-spacing:-0.015em; margin:0 0 1.1rem; max-width:22ch; text-wrap:balance; }
.case .meta{ display:flex; gap:.6rem; flex-wrap:wrap; margin-bottom:1.6rem; padding-bottom:1.6rem;
  border-bottom:3px double var(--rule-strong); }
.case .step{ border-bottom:1px solid var(--rule); padding:1.7rem 0 1.9rem; }
.case .step:last-of-type{ border-bottom:none; }
.case .step .k{ font-family:var(--f-mono); font-size:.7rem; letter-spacing:.12em; text-transform:uppercase;
  color:var(--seal); display:block; margin-bottom:.55rem; }
.case .step h3{ font-family:var(--f-serif); font-size:1.22rem; margin:0 0 .55rem; letter-spacing:-0.01em; line-height:1.4; }
.case .step p{ margin:0; color:var(--ink-soft); }
.case .case-cta{ margin-top:2rem; }
.case .case-body{ margin-top:2.5rem; }
.case .play-row{ margin:0 0 .6rem; }
.archived-note{ margin:0 0 .6rem; padding:.9rem 1.1rem; background:var(--paper-sink); border:1px solid var(--rule);
  border-radius:4px; font-size:.92rem; color:var(--ink-soft); }
.archived-note a{ color:var(--seal); text-decoration:none; white-space:nowrap; }

/* ── reading (post / page) ───────────────────────── */
.reading{ padding:4rem 0; }
.reading .body{ max-width:var(--maxw); }
.reading .eyebrow{ display:block; margin-bottom:1rem; }
.reading h1{ font-family:var(--f-serif); font-size:clamp(1.75rem,4vw,2.35rem); line-height:1.32;
  letter-spacing:-0.015em; max-width:24ch; margin:0 0 1.5rem; text-wrap:balance; }
.rulebar{ border-top:3px double var(--rule-strong); margin:0 0 2.2rem; }

/* 한/영 전환 — JS가 켜질 때만 보인다(없으면 두 언어가 위아래로 이어져 그대로 읽힌다) */
.lang-switch{ display:inline-flex; border:1px solid var(--rule-strong); border-radius:3px; overflow:hidden; margin:0 0 1.8rem; }
.lang-switch[hidden]{ display:none; }
.lang-switch button{ font:inherit; font-size:.82rem; background:transparent; color:var(--ink-soft);
  border:none; padding:.45em 1em; cursor:pointer; touch-action:manipulation; }
.lang-switch button + button{ border-left:1px solid var(--rule-strong); }
.lang-switch button[aria-pressed="true"]{ background:var(--ink); color:var(--paper); }
.lang-switch button:focus-visible{ outline:2px solid var(--seal); outline-offset:-2px; }
[data-pane][hidden]{ display:none; }
.en-head{ margin-top:0 !important; }

/* 요약 박스 (머리말 summary가 있을 때) */
.summary{ margin:0 0 1.8rem; padding:1rem 1.2rem; background:var(--paper-raise); border:1px solid var(--rule);
  border-left:3px solid var(--seal); border-radius:4px; }
.summary-k,.toc-k{ display:block; font-family:var(--f-mono); font-size:.7rem; letter-spacing:.12em;
  text-transform:uppercase; color:var(--seal); margin-bottom:.4rem; }
.summary p{ margin:0; color:var(--ink); }

/* 목차 — 소제목 3개 이상인 글만 */
.toc{ margin:0 0 2.4rem; padding:1rem 1.2rem; border:1px solid var(--rule); border-radius:4px; background:var(--paper-raise); }
.toc ul{ margin:0; padding:0; list-style:none; }
.toc li{ margin:.25rem 0; font-size:.93rem; }
.toc li{ padding-left:.9rem; position:relative; }
.toc li::before{ content:"·"; position:absolute; left:0; color:var(--faint); }
.toc a{ color:var(--ink-soft); text-decoration:none; }
.toc a:hover{ color:var(--seal); }

/* 글 하단 — 이 글의 프로젝트 카드 */
.post-project{ margin:3.2rem 0 0; padding:1.4rem 1.4rem 1.3rem; border:1px solid var(--rule-strong);
  border-radius:6px; background:var(--paper-raise); }
.post-project .eyebrow{ display:block; margin-bottom:.7rem; }
.pp-top{ display:flex; align-items:center; justify-content:space-between; gap:1rem; margin-bottom:.4rem; }
.pp-title{ font-family:var(--f-serif); font-size:1.25rem; font-weight:600; text-decoration:none; }
.pp-title:hover{ color:var(--seal); }
.pp-blurb{ margin:0 0 1rem; color:var(--ink-soft); font-size:.95rem; }
.pp-note{ margin:0 0 .8rem; color:var(--faint); font-size:.9rem; }
.post-project .play-row{ margin-bottom:.9rem; }
.pp-more{ font-family:var(--f-mono); font-size:.75rem; letter-spacing:.06em; color:var(--faint); text-decoration:none; }
.pp-more:hover{ color:var(--seal); }

/* 이전·다음 기록 */
.post-nav{ display:grid; grid-template-columns:1fr 1fr; gap:1rem; margin:2.4rem 0 0; padding-top:1.4rem;
  border-top:3px double var(--rule-strong); }
.post-nav a{ display:block; text-decoration:none; padding:.5rem 0; }
.post-nav .next{ text-align:right; }
.pn-k{ display:block; font-family:var(--f-mono); font-size:.7rem; letter-spacing:.08em; color:var(--faint); margin-bottom:.2rem; }
.pn-t{ display:block; font-size:.95rem; color:var(--ink-soft); }
.post-nav a:hover .pn-t{ color:var(--seal); }

/* prose — markdown 본문 */
.prose h2{ font-family:var(--f-serif); font-size:1.35rem; font-weight:600; letter-spacing:-0.01em;
  line-height:1.35; margin:2.7rem 0 .9rem; }
.prose h3{ font-family:var(--f-serif); font-size:1.12rem; font-weight:600; margin:2rem 0 .7rem; }
.prose p{ margin:0 0 1.3rem; color:var(--ink-soft); }
.prose a{ color:var(--seal); text-decoration:none; border-bottom:1px solid var(--seal-soft); }
.prose a:hover{ border-bottom-color:var(--seal); }
.prose strong{ color:var(--ink); font-weight:600; }
.prose em{ color:var(--faint); }
.prose ul,.prose ol{ margin:0 0 1.3rem; padding-left:1.3rem; color:var(--ink-soft); }
.prose li{ margin:.4rem 0; }
.prose li::marker{ color:var(--faint); }
.prose blockquote{ margin:1.8rem 0; padding:.6rem 0 .6rem 1.2rem; border-left:2px solid var(--seal);
  color:var(--ink); font-size:1.08rem; }
.prose blockquote p{ color:var(--ink); margin:0; }
.prose code{ font-family:var(--f-mono); font-size:.86em; background:var(--paper-sink);
  border:1px solid var(--rule); border-radius:3px; padding:.1em .4em; }
.prose pre{ background:var(--paper-sink); border:1px solid var(--rule); border-radius:6px;
  padding:1rem 1.15rem; overflow-x:auto; margin:0 0 1.4rem; }
.prose pre code{ background:none; border:none; padding:0; font-size:.85rem; }
.prose hr{ border:none; border-top:3px double var(--rule-strong); margin:2.8rem 0; }
.prose table{ width:100%; border-collapse:collapse; margin:0 0 1.4rem; font-size:.95rem;
  display:block; overflow-x:auto; }
.prose th,.prose td{ text-align:left; padding:.6rem .7rem; border-bottom:1px solid var(--rule); }
.prose th{ color:var(--ink); font-weight:600; border-bottom:3px double var(--rule-strong); }
.prose td{ color:var(--ink-soft); }

/* ── footer: 장부 마감선 ─────────────────────────── */
footer.site{ padding:2.6rem 0 4rem; border-top:3px double var(--rule-strong); margin-top:-1px; }
footer.site .row{ display:flex; justify-content:space-between; flex-wrap:wrap; gap:1rem;
  font-family:var(--f-mono); font-size:.78rem; letter-spacing:.02em; color:var(--faint); }
footer.site a{ color:var(--ink-soft); text-decoration:none; }
footer.site a:hover{ color:var(--seal); }

a:focus-visible,.btn:focus-visible{ outline:2px solid var(--seal); outline-offset:3px; border-radius:2px; }

@media (max-width:560px){
  body{ font-size:16px; }
  .hero{ padding:3.4rem 0 3rem; }
  ul.log li a{ flex-wrap:wrap; gap:.35rem .8rem; }
  ul.log .no{ width:auto; }
  ul.log .date{ width:auto; }
  ul.log .lt{ flex-basis:100%; }
  nav.top{ gap:.9rem; }
  nav.top a{ font-size:.82rem; }
  .mark .mk{ display:none; }
  .post-nav{ grid-template-columns:1fr; }
  .post-nav .next{ text-align:left; }
}
@media (prefers-reduced-motion:reduce){
  html{ scroll-behavior:auto; }
  *{ transition:none !important; animation:none !important; }
}