/* =========================================================================
   디트로이트 미술관 걸작전 — 감상 가이드 · BASE (구조 + 토큰)
   레이아웃/컴포넌트 골격을 CSS 변수로 토큰화. 색·폰트·여백·라운드 등 시각
   토큰은 테마(theme-*.css)에서 덮어쓴다. 테마 스위처/라이트박스/프로그레스
   등 테마 불변 요소도 여기서 관리.
   HTML 클래스 계약은 build.py 출력과 1:1.
   ========================================================================= */

:root {
  /* color tokens (테마가 override) */
  --bg: #f4efe6;
  --bg-2: #efe8db;
  --card: #fbf8f1;
  --card-2: #f3ece1;
  --ink: #20201d;
  --ink-soft: #4b4843;
  --ink-faint: #837d72;
  --line: #ddd4c3;
  --line-soft: #e8e0d1;
  --accent: #9a7b32;
  --accent-2: #8c4a2f;
  --accent-ink: #ffffff;
  --link: #8c4a2f;
  --link-hover: #9a7b32;

  --hero-bg: linear-gradient(180deg,#1d1c19,#25241f 60%,#2b2924);
  --hero-ink: #f3ecdd;
  --hero-sub: #d9cfba;
  --hero-kicker: #c19a3e;
  --hero-rule: #5a5446;

  --badge-show-bg: #2f5d57; --badge-show-ink: #eafff8;
  --badge-dia-bg: #7a3b22;  --badge-dia-ink: #ffeede;
  --badge-likely-bg:#8a7320; --badge-likely-ink:#fff6da;

  /* type tokens */
  --font-display: 'Cormorant Garamond','Noto Serif KR',Georgia,serif;
  --font-serif: 'Noto Serif KR','Cormorant Garamond',Georgia,serif;
  --font-body: 'Pretendard',-apple-system,BlinkMacSystemFont,'Apple SD Gothic Neo',system-ui,sans-serif;
  --font-h2: var(--font-serif);
  --base-size: 17px;
  --body-leading: 1.78;
  --body-spacing: -0.003em;

  --h1-size: clamp(40px,7vw,84px);
  --h1-weight: 600;
  --h1-spacing: .005em;
  --h1-leading: 1.04;
  --h1-transform: none;
  --h1-font: var(--font-display);

  --eyebrow-spacing: .34em;
  --eyebrow-transform: uppercase;

  /* shape / space */
  --maxw: 1180px;
  --readw: 760px;
  --radius: 14px;
  --radius-card: 16px;
  --radius-img: 2px;
  --card-border: 1px solid var(--line);
  --card-shadow: 0 1px 2px rgba(32,32,29,.06), 0 8px 30px rgba(32,32,29,.08);
  --shadow-lg: 0 30px 60px rgba(32,32,29,.18);

  --frame-bg: #fff;
  --frame-pad: 14px;
  --frame-radius: 6px;
  --frame-border: 1px solid var(--line);

  /* decoration toggles */
  --kp-mark: '✦';
  --ff-mark: '❡';
  --dropcap-color: var(--accent);
  --dropcap-size: 3.4em;
  --section-rule: 1px solid var(--line-soft);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: var(--body-leading);
  font-size: var(--base-size);
  letter-spacing: var(--body-spacing);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--link); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--link-hover); }

/* ---------- top nav ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: var(--topbar-bg, rgba(244,239,230,.86));
  backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar .inner { max-width: var(--maxw); margin: 0 auto; padding: 12px 22px; display: flex; align-items: center; gap: 16px; }
.topbar .brand { font-family: var(--brand-font, var(--font-display)); font-weight: var(--brand-weight,600); font-size: 21px; letter-spacing: .01em; color: var(--ink); text-decoration: none; white-space: nowrap; text-transform: var(--brand-transform,none); }
.topbar .brand b { color: var(--accent); font-weight: inherit; }
.topbar nav { margin-left: auto; display: flex; gap: 4px; flex-wrap: wrap; }
.topbar nav a { color: var(--ink-soft); text-decoration: none; font-size: 14px; font-weight: 600; padding: 7px 12px; border-radius: var(--nav-radius,999px); }
.topbar nav a:hover { background: var(--bg-2); color: var(--ink); }
.navtoggle { display: none; }

/* ---------- layout ---------- */
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.prose { max-width: var(--readw); margin-left: auto; margin-right: auto; }
section { scroll-margin-top: 78px; }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; background: var(--hero-bg); color: var(--hero-ink); border-bottom: var(--hero-border, 1px solid #000); }
.hero .wrap { padding: var(--hero-pad, 84px 22px 72px); position: relative; z-index: 2; }
.hero .kicker { font-family: var(--font-body); letter-spacing: var(--kicker-spacing,.42em); text-transform: uppercase; font-size: 12px; color: var(--hero-kicker); margin: 0 0 20px; font-weight: var(--kicker-weight,400); }
.hero h1 { font-family: var(--h1-font); font-weight: var(--h1-weight); line-height: var(--h1-leading); font-size: var(--h1-size); margin: 0 0 8px; letter-spacing: var(--h1-spacing); text-transform: var(--h1-transform); }
.hero h1 .ko { font-family: var(--ko-display, var(--font-serif)); font-weight: var(--ko-weight,700); display: block; font-size: var(--ko-size, clamp(26px,4.4vw,46px)); margin-top: 14px; color: var(--hero-ink); letter-spacing: var(--ko-spacing,0); }
.hero .lede { max-width: 620px; font-size: 18px; color: var(--hero-sub); margin: 22px 0 30px; }
.hero .facts { display: flex; flex-wrap: wrap; gap: 10px 26px; font-size: 14.5px; color: var(--hero-sub); }
.hero .facts b { color: var(--hero-ink); font-weight: 700; }
.hero .cta { margin-top: 34px; display: flex; gap: 12px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 13px 22px; border-radius: var(--btn-radius,999px); font-weight: 700; text-decoration: none; font-size: 15px; border: 1px solid transparent; cursor: pointer; transition: transform .15s ease, background .2s, color .2s, border-color .2s; }
.btn.primary { background: var(--accent); color: var(--accent-ink); }
.btn.primary:hover { filter: brightness(1.06); transform: translateY(-1px); }
.btn.ghost { border-color: var(--hero-rule); color: var(--hero-ink); }
.btn.ghost:hover { border-color: var(--hero-kicker); }

/* ---------- section heading ---------- */
.shead { text-align: var(--shead-align, center); margin: 64px auto 30px; max-width: var(--readw); }
.shead .eyebrow { font-size: 12px; letter-spacing: var(--eyebrow-spacing); text-transform: var(--eyebrow-transform); color: var(--accent); font-weight: 700; margin: 0 0 12px; }
.shead h2 { font-family: var(--font-h2); font-weight: 700; font-size: clamp(26px,3.6vw,38px); margin: 0; line-height: 1.2; letter-spacing: var(--h2-spacing,0); }
.shead p { color: var(--ink-soft); margin: 14px 0 0; }
.rule { width: 54px; height: 3px; background: var(--accent); border: 0; margin: 18px auto 0; border-radius: 3px; }
.shead[id] .rule, .rule { margin-left: var(--rule-ml, auto); margin-right: var(--rule-mr, auto); }

/* ---------- syllabus ---------- */
.syllabus { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: var(--card-gap,18px); margin: 30px 0 10px; }
.daycard { display: flex; flex-direction: column; background: var(--card); border: var(--card-border); border-radius: var(--radius-card); overflow: hidden; text-decoration: none; color: inherit; box-shadow: var(--card-shadow); transition: transform .25s ease, box-shadow .25s ease, border-color .25s; }
.daycard:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--accent); }
.daycard .thumb { aspect-ratio: var(--thumb-ratio, 16/10); background: var(--bg-2) center/cover no-repeat; position: relative; }
.daycard .thumb::after { content:''; position:absolute; inset:0; background: var(--thumb-overlay, linear-gradient(180deg, transparent 55%, rgba(0,0,0,.32))); }
.daycard .body { padding: 16px 18px 18px; background: var(--card-body-bg, transparent); }
.daycard .dnum { font-family: var(--num-font, var(--font-display)); font-size: 14px; letter-spacing: .2em; color: var(--accent); font-weight: 600; text-transform: uppercase; }
.daycard h3 { font-family: var(--font-serif); font-size: 19px; margin: 4px 0 6px; line-height: 1.32; font-weight: 700; }
.daycard p { margin: 0; font-size: 14px; color: var(--ink-faint); }
.daycard .tag { display:inline-block; margin-top:12px; font-size:12px; font-weight:700; color:var(--tag-ink,var(--badge-show-bg)); background:var(--tag-bg,var(--card-2)); padding:4px 10px; border-radius: var(--tag-radius,999px); }

/* ---------- article header ---------- */
.arthead { background: var(--arthead-bg, var(--bg-2)); border-bottom: 1px solid var(--line); }
.arthead .wrap { padding: 40px 22px 34px; }
.crumbs { font-size: 13px; color: var(--ink-faint); margin: 0 0 14px; }
.crumbs a { color: var(--ink-faint); text-decoration: none; }
.crumbs a:hover { color: var(--accent-2); }
.arthead .dnum { font-family: var(--num-font, var(--font-display)); letter-spacing:.2em; text-transform:uppercase; color: var(--accent); font-weight:600; font-size:14px; }
.arthead h1 { font-family: var(--arthead-font, var(--font-serif)); font-weight: 800; font-size: clamp(28px,4.6vw,46px); margin: 8px 0 6px; line-height: 1.12; letter-spacing: var(--arthead-spacing,0); text-transform: var(--arthead-transform,none); }
.arthead .sub { font-family: var(--font-display); font-style: italic; font-size: 20px; color: var(--ink-soft); margin: 0 0 4px; }
.arthead .oneliner { color: var(--ink-soft); max-width: var(--readw); margin: 14px 0 0; font-size: 17.5px; }
.metachips { display: flex; flex-wrap: wrap; gap: 8px; margin: 18px 0 0; }
.chip { font-size: 12.5px; font-weight: 600; color: var(--ink-soft); background: var(--card); border: 1px solid var(--line); padding: 5px 12px; border-radius: var(--chip-radius,999px); }
.chip b { color: var(--ink); }

/* ---------- prose ---------- */
.prose h2 { font-family: var(--font-h2); font-weight: 700; font-size: 26px; margin: 52px 0 4px; line-height: 1.25; letter-spacing: var(--h2-spacing,0); }
.prose h2 .en { font-family: var(--font-display); font-style: italic; font-weight: 500; color: var(--ink-faint); font-size: 19px; margin-left: 8px; }
.prose h3 { font-family: var(--font-body); font-weight: 700; font-size: 19px; margin: 32px 0 6px; color: var(--ink); }
.prose p { margin: 14px 0; }
.prose .lead { font-size: 19px; color: var(--ink-soft); }
.sec-rule { border: 0; border-top: var(--section-rule); margin: 40px 0; }
.dropcap::first-letter { font-family: var(--font-display); font-weight: 600; font-size: var(--dropcap-size); line-height: .82; float: left; padding: 6px 10px 0 0; color: var(--dropcap-color); }

/* ---------- figure ---------- */
figure.art { margin: 30px 0; }
figure.art .frame { background: var(--frame-bg); padding: var(--frame-pad); border-radius: var(--frame-radius); box-shadow: var(--card-shadow); border: var(--frame-border); cursor: zoom-in; overflow: hidden; }
figure.art .frame img { width: 100%; border-radius: var(--radius-img); transition: transform .5s ease; }
figure.art .frame:hover img { transform: scale(1.02); }
figure.art.noimg .frame { cursor: default; aspect-ratio: 4/3; display: grid; place-items: center; text-align: center; background: var(--noimg-bg, repeating-linear-gradient(45deg, var(--bg-2), var(--bg-2) 12px, var(--card) 12px, var(--card) 24px)); color: var(--ink-faint); }
figure.art.noimg .ph { max-width: 320px; padding: 24px; }
figure.art.noimg .ph .mark { font-family: var(--font-display); font-size: 40px; color: var(--accent); }
figure.art figcaption { font-size: 14px; color: var(--ink-faint); margin-top: 12px; line-height: 1.6; }
figure.art figcaption .t { color: var(--ink); font-weight: 600; }
figure.art figcaption .t i { font-family: var(--font-display); font-style: italic; font-weight: 600; }
.badge { display:inline-block; font-size:11px; font-weight:800; letter-spacing:.03em; padding:3px 8px; border-radius:6px; vertical-align:middle; margin-left:6px; }
.badge.show { background:var(--badge-show-bg); color:var(--badge-show-ink); }
.badge.dia { background:var(--badge-dia-bg); color:var(--badge-dia-ink); }
.badge.likely { background:var(--badge-likely-bg); color:var(--badge-likely-ink); }
.figgrid { display:grid; grid-template-columns: repeat(auto-fit, minmax(240px,1fr)); gap: 20px; margin: 26px 0; }
.figgrid figure.art { margin: 0; }

/* ---------- callouts ---------- */
.callout { border-radius: var(--radius); padding: 18px 20px; margin: 22px 0; position: relative; border: 1px solid var(--line); background: var(--card); }
.callout .ctitle { font-weight: 800; font-size: 13.5px; letter-spacing: .02em; margin: 0 0 8px; display: flex; align-items: center; gap: 8px; text-transform: uppercase; }
.callout p { margin: 6px 0; }
.callout ul { margin: 6px 0; padding-left: 20px; }
.callout li { margin: 6px 0; }
.callout.look { background: var(--look-bg, #e3ece9); border-color: var(--look-border,#cfe0db); }
.callout.look .ctitle { color: var(--look-ink, var(--badge-show-bg)); }
.callout.behind { background: var(--behind-bg,#f3ece1); border-color: var(--behind-border,#e6d8bf); }
.callout.behind .ctitle { color: var(--behind-ink, var(--accent)); }
.callout.fact { background: var(--fact-bg,#f0e4dd); border-color: var(--fact-border,#e7d3c8); }
.callout.fact .ctitle { color: var(--fact-ink, var(--accent-2)); }
.callout.note { background: var(--note-bg,#eef0ee); border-color: var(--note-border,#dbe0da); }
.callout.note .ctitle { color: var(--note-ink,#586b56); }
.callout.quote { background: transparent; border: 0; border-left: 4px solid var(--accent); border-radius: 0; padding: 6px 0 6px 22px; }
.callout.quote p { font-family: var(--font-serif); font-size: 20px; line-height: 1.6; color: var(--ink-soft); font-weight: 400; }
.callout.quote cite { display:block; font-style: normal; font-family: var(--font-body); font-size: 14px; color: var(--ink-faint); margin-top: 8px; }

/* stories */
.stories .story { padding: 18px 0; border-top: 1px solid var(--line-soft); }
.stories .story:first-child { border-top: 0; }
.stories .story h4 { margin: 0 0 6px; font-size: 18px; font-family: var(--font-serif); font-weight: 700; }
.stories .story h4 .n { color: var(--accent); font-family: var(--num-font, var(--font-display)); margin-right: 10px; }
.stories .story p { margin: 0; color: var(--ink-soft); }

/* timeline */
.timeline { position: relative; margin: 28px 0; padding-left: 28px; }
.timeline::before { content:''; position:absolute; left:7px; top:6px; bottom:6px; width:2px; background: var(--line); }
.timeline .tl { position: relative; padding: 0 0 22px 18px; }
.timeline .tl::before { content:''; position:absolute; left:-25px; top:6px; width:12px; height:12px; border-radius:50%; background: var(--accent); box-shadow: 0 0 0 4px var(--bg); }
.timeline .yr { font-family: var(--num-font, var(--font-display)); font-weight:600; font-size: 18px; color: var(--accent-2); }
.timeline .ev { color: var(--ink-soft); }

/* glossary */
.glossary { columns: 2; column-gap: 36px; margin: 24px 0; }
.glossary .g { break-inside: avoid; margin: 0 0 16px; }
.glossary .term { font-weight: 800; color: var(--ink); }
.glossary .def { color: var(--ink-soft); font-size: 15.5px; }

/* tables */
.table-wrap { overflow-x: auto; margin: 24px 0; border: 1px solid var(--line); border-radius: var(--radius); }
table { border-collapse: collapse; width: 100%; font-size: 15px; background: var(--card); }
th, td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line-soft); vertical-align: top; }
thead th { background: var(--bg-2); font-weight: 800; color: var(--ink); }
tbody tr:last-child td { border-bottom: 0; }
td b, th b { color: var(--ink); }

/* practical */
.practical { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); gap: 14px; margin: 24px 0; }
.practical .pi { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px 16px; }
.practical .pi .l { font-size: 12.5px; font-weight: 800; letter-spacing:.03em; color: var(--accent); text-transform: uppercase; }
.practical .pi .v { color: var(--ink); margin-top: 4px; }

/* keypoints */
.keypoints { background: var(--keypoints-bg, var(--card)); border:1px solid var(--line); border-radius: var(--radius-card); padding: 22px 24px; margin: 30px 0; box-shadow: var(--card-shadow); }
.keypoints h3 { margin: 0 0 12px; font-size: 14px; letter-spacing:.04em; text-transform: uppercase; color: var(--accent); }
.keypoints ul { margin: 0; padding-left: 0; list-style: none; }
.keypoints li { position: relative; padding: 8px 0 8px 28px; border-top: 1px solid var(--line-soft); }
.keypoints li:first-child { border-top: 0; }
.keypoints li::before { content: var(--kp-mark); position: absolute; left: 4px; top: 8px; color: var(--accent); }

/* fun facts */
.facts-grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(240px,1fr)); gap:12px; margin: 22px 0; }
.facts-grid .ff { background: var(--ff-bg,#f0e4dd); border:1px solid var(--ff-border,#ead8cd); border-radius:var(--radius); padding:14px 16px; font-size:15px; color: var(--ink-soft); }
.facts-grid .ff::before { content: var(--ff-mark); color: var(--accent-2); font-weight:800; margin-right:8px; }

/* sources / confidence */
.sources { font-size: 13px; color: var(--ink-faint); margin: 30px 0 0; }
.sources summary { cursor: pointer; font-weight: 700; color: var(--ink-soft); }
.sources ul { margin: 10px 0 0; padding-left: 18px; }
.sources a { color: var(--ink-faint); word-break: break-all; }
.confidence { background: var(--conf-bg,#faf3e6); border: 1px dashed var(--conf-border,#d8c79c); border-radius: var(--radius); padding: 14px 18px; margin: 24px 0; font-size: 14.5px; }
.confidence .ctitle { font-weight: 800; color: var(--accent); margin-bottom: 6px; }

/* pager */
.pager { display: flex; justify-content: space-between; gap: 14px; margin: 56px 0 20px; }
.pager a { flex: 1; text-decoration: none; color: inherit; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px 18px; transition: border-color .2s, transform .2s; }
.pager a:hover { border-color: var(--accent); transform: translateY(-2px); }
.pager .dir { font-size: 12px; color: var(--accent); font-weight: 800; letter-spacing:.06em; text-transform: uppercase; }
.pager .ttl { font-family: var(--font-serif); font-weight: 700; margin-top: 4px; }
.pager a.next { text-align: right; }
.pager a.disabled { opacity: .4; pointer-events: none; }

/* footer */
footer.site { background: var(--footer-bg,#25241f); color: var(--footer-ink,#cabfa6); margin-top: 70px; }
footer.site .wrap { padding: 40px 22px; }
footer.site h4 { font-family: var(--font-serif); color: var(--footer-strong,#f1e7d2); margin: 0 0 8px; }
footer.site p { margin: 6px 0; font-size: 14px; }
footer.site a { color: var(--footer-link,#c19a3e); }
.disclaimer { font-size: 12.5px; color: var(--footer-ink); opacity: .7; }

/* ---------- progress bar ---------- */
#progress { position: fixed; top: 0; left: 0; height: 3px; background: var(--accent); width: 0; z-index: 60; transition: width .1s; }

/* ---------- theme switcher (theme-agnostic) ---------- */
.themebar {
  position: fixed; left: 50%; transform: translateX(-50%); bottom: 18px; z-index: 120;
  display: flex; align-items: center; gap: 4px;
  background: rgba(20,18,16,.86); backdrop-filter: blur(10px) saturate(140%);
  border: 1px solid rgba(255,255,255,.14); border-radius: 999px; padding: 5px 6px 5px 14px;
  box-shadow: 0 12px 40px rgba(0,0,0,.35); font-family: 'Pretendard',system-ui,sans-serif;
}
.themebar .tb-label { color: #b9b2a6; font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; margin-right: 6px; }
.themebar button { appearance: none; border: 0; cursor: pointer; background: transparent; color: #ded7c9; font-size: 13px; font-weight: 600; padding: 7px 13px; border-radius: 999px; font-family: inherit; transition: background .2s, color .2s; }
.themebar button:hover { color: #fff; background: rgba(255,255,255,.08); }
.themebar button.active { background: #f0e8d6; color: #1c1a16; }
@media (max-width: 620px) {
  .themebar { bottom: 10px; padding: 4px 5px 4px 10px; gap: 2px; }
  .themebar .tb-label { display: none; }
  .themebar button { padding: 6px 10px; font-size: 12px; }
}

/* ---------- lightbox ---------- */
.lb { position: fixed; inset: 0; background: rgba(16,14,11,.95); display: none; place-items: center; z-index: 200; padding: 30px; }
.lb.open { display: grid; }
.lb img { max-width: 96vw; max-height: 88vh; box-shadow: 0 30px 80px rgba(0,0,0,.6); border-radius: 3px; }
.lb .cap { position: absolute; bottom: 18px; left: 0; right: 0; text-align: center; color: #d9cfba; font-size: 14px; padding: 0 20px; }
.lb .x { position: absolute; top: 18px; right: 24px; color: #fff; font-size: 30px; cursor: pointer; background: none; border: 0; }
.lb .hint { position:absolute; top: 22px; left: 24px; color:#a99; font-size:12px; }

/* ---------- responsive ---------- */
@media (max-width: 860px) {
  body { font-size: 16px; }
  .glossary { columns: 1; }
  .topbar nav { display: none; position: absolute; top: 100%; left: 0; right: 0; background: var(--bg); flex-direction: column; padding: 8px 16px 16px; border-bottom: 1px solid var(--line); }
  .topbar nav.open { display: flex; }
  .navtoggle { display: inline-flex; margin-left: auto; background: none; border: 1px solid var(--line); border-radius: 8px; padding: 7px 10px; font-size: 18px; cursor: pointer; color: var(--ink); }
  .pager { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; scroll-behavior: auto; } }