/* history-atlas v0.2: reading-first, bilingual toggle, mindmap, image maps */
:root{--bg:#faf8f2;--ink:#222;--mut:#6b6259;--line:#e5ddcf;--card:#fff;--acc:#8c2f0e;--acc2:#b3541e}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.9 system-ui,'Noto Serif SC','Songti SC',serif}
.wrap{max-width:1080px;margin:0 auto;padding:24px 18px 60px}
header.top{border-bottom:2px solid var(--acc);margin-bottom:18px;position:sticky;top:0;background:var(--bg);padding-top:12px;z-index:5}
.crumb{font-size:13px;color:var(--mut)}
article.entry{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:26px 28px;max-width:760px;margin:0 auto 22px;font-size:17px}
article.entry h1{font-size:24px}
article.entry h2{border-left:4px solid var(--acc);padding-left:10px;margin-top:1.6em;font-size:19px}
article.entry h3{font-size:17px}
article.entry p{margin:.7em 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px}
.card h3{margin:.2em 0;font-size:17px}
.map-thumb img{width:100%;height:auto;border-radius:8px;border:1px solid var(--line)}
figure.map-fig{margin:0;max-width:760px}
figure.map-fig img{width:100%;height:auto;border:1px solid var(--line);border-radius:12px;background:#fff}
figure.map-fig figcaption{font-size:13px;color:var(--mut);margin:6px 0 0}
.lang-switch{margin:10px 0 16px;display:flex;gap:8px}
.lang-switch button{padding:8px 22px;border:1px solid var(--line);border-radius:20px;background:#fff;font-size:15px;cursor:pointer}
.lang-switch button.on{background:var(--acc);color:#fff;border-color:var(--acc)}
.lang-note{font-size:13px;color:var(--mut)}
.badge{display:inline-block;font-size:12px;border:1px solid var(--line);border-radius:20px;padding:1px 10px;margin-right:6px;color:var(--mut)}
nav.filters{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0}
nav.filters select,input{padding:8px 10px;border:1px solid var(--line);border-radius:8px;font-size:14px}
.mm-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:12px;background:#fff;padding:12px}
pre.mermaid{background:#fff;font-size:12px;margin:0;min-width:520px}
details{max-width:760px;margin:10px auto;background:#fff;border:1px solid var(--line);border-radius:10px;padding:8px 14px;font-size:14px}
details summary{cursor:pointer;color:var(--acc);font-weight:600}
details pre{white-space:pre-wrap;font-size:13px;line-height:1.7}
table{border-collapse:collapse;width:100%;font-size:14px}
th,td{border:1px solid var(--line);padding:6px 8px;text-align:left}
.tl{border-left:3px solid var(--acc);margin-left:8px;padding-left:16px}
.tl li{margin:8px 0}
footer{margin-top:40px;color:var(--mut);font-size:13px}
@media(max-width:640px){.wrap{padding:16px 12px 50px}article.entry{padding:18px 16px;font-size:16px}header.top{position:static}}