:root{
  --paper:#F5F2EA; --card:#FCFAF3; --ink:#26241E; --brick:#B0202A;
  --ochre:#D9822B; --navy:#2E5A78; --sage:#77813F; --grey:#8A8474; --line:#D9D2BF;
  --serif:"Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --mono:"Noto Sans Mono","SFMono-Regular",Consolas,monospace;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:15px;line-height:1.65}
a{color:var(--brick);text-decoration:none}
a:hover{text-decoration:underline}

/* header */
.site-header{display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:12px 28px;background:var(--card);border-bottom:3px solid var(--brick);flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:14px}
.brand-mark{width:52px;height:52px;display:block}
.brand-name{font-family:var(--serif);font-weight:700;font-size:27px;letter-spacing:.04em;line-height:1.1}
.brand-name span{color:var(--brick)}
.brand-sub{font-size:12.5px;color:var(--grey);letter-spacing:.08em}
.site-nav{display:flex;gap:30px;flex-wrap:wrap}
.site-nav a{color:var(--ink);font-size:16px;padding:2px 1px}
.site-nav a.active{color:var(--brick);font-weight:700;border-bottom:3px solid var(--brick)}

/* map layout */
.map-section{padding:18px 22px 6px}
.map-layout{display:flex;gap:16px;align-items:stretch}
.panel{width:302px;flex:0 0 302px;background:var(--card);border:1px solid var(--line);
  border-radius:10px;padding:18px 18px 14px;display:flex;flex-direction:column}
.panel-head h2{font-family:var(--serif);font-size:22px;margin:0 0 10px}
.panel-head .en{font-family:var(--mono);font-size:12px;color:var(--grey);letter-spacing:.12em}
.search-box input{width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:8px;
  background:#fff;font-size:14px;font-family:var(--sans);color:var(--ink)}
.search-box input:focus{outline:2px solid var(--brick);outline-offset:0}
.layer-list{list-style:none;margin:14px 0 6px;padding:0}
.layer-list li{display:flex;align-items:center;gap:10px;padding:9px 0;border-bottom:1px dotted var(--line)}
.layer-list li:last-child{border-bottom:none}
.layer-list .dot{width:11px;height:11px;border-radius:50%;flex:0 0 11px}
.layer-meta{flex:1;min-width:0}
.layer-meta strong{display:block;font-size:15.5px;line-height:1.25}
.layer-meta small{color:var(--grey);font-size:12px;line-height:1.3;display:block}
.switch{position:relative;display:inline-block;width:46px;height:24px;flex:0 0 46px}
.switch input{opacity:0;width:0;height:0}
.switch span{position:absolute;inset:0;background:#CFC9B8;border-radius:24px;cursor:pointer;transition:.2s}
.switch span:before{content:"";position:absolute;width:18px;height:18px;border-radius:50%;
  background:#fff;top:3px;left:3px;transition:.2s}
.switch input:checked + span{background:var(--brick)}
.switch input:checked + span:before{transform:translateX(22px)}
.legend{margin-top:10px;border-top:1px solid var(--line);padding-top:10px}
.legend h3{font-family:var(--serif);font-size:15px;margin:0 0 6px}
.legend p{margin:4px 0;font-size:12.5px;color:#55503F;display:flex;align-items:center;gap:8px}
.lg{width:12px;height:12px;display:inline-block;flex:0 0 12px}
.lg-node{background:var(--brick);border-radius:50%;border:1.5px solid #fff;box-shadow:0 0 0 1px var(--line)}
.lg-hash{background:rgba(217,130,43,.55)}
.lg-mine{background:#A85E14}
.lg-ln{background:var(--navy);transform:rotate(45deg) scale(.8)}
.snapshot-note{margin-top:auto;padding-top:12px;font-size:12px;color:var(--grey);line-height:1.55}

.map-wrap{position:relative;flex:1;min-width:0;border:1px solid #B7AD93;border-radius:4px;overflow:hidden;background:#EFE9D8}
#map{position:absolute;inset:0}
.maplibregl-ctrl-attrib{font-size:10px;background:rgba(252,250,243,.75)}
.map-tagline{position:absolute;left:22px;top:18px;z-index:5;pointer-events:none;
  background:rgba(245,242,234,.82);padding:10px 16px 8px;border-left:4px solid var(--brick);border-radius:2px}
.map-tagline h1{font-family:var(--serif);font-size:23px;line-height:1.45;margin:0;font-weight:700}
.map-tagline .accent{color:var(--brick)}
.map-foot{position:absolute;right:12px;bottom:8px;z-index:5;font-family:var(--mono);
  font-size:11.5px;color:#6E6852;display:flex;gap:16px;pointer-events:none}
.map-watermark{font-family:var(--sans)}

/* dossier */
.dossier{position:absolute;right:18px;bottom:44px;z-index:6;width:340px;background:var(--card);
  border:1px solid var(--line);border-top:5px solid var(--brick);border-radius:6px;
  padding:16px 20px 12px;box-shadow:0 8px 28px rgba(38,36,30,.16)}
.dossier-close{position:absolute;top:6px;right:10px;border:none;background:none;font-size:22px;
  color:var(--grey);cursor:pointer;line-height:1}
.dossier-kicker{font-size:11.5px;color:var(--brick);font-weight:700;letter-spacing:.14em}
.dossier-name{font-family:var(--serif);font-size:27px;margin:4px 0 8px}
.dossier-name small{font-size:15px;color:var(--grey);font-family:var(--serif)}
.dossier-rows{margin:0}
.dossier-rows div{display:flex;justify-content:space-between;align-items:baseline;
  padding:5px 0;border-bottom:1px dotted var(--line)}
.dossier-rows dt{color:var(--grey);font-size:13.5px}
.dossier-rows dd{margin:0;font-family:var(--mono);font-weight:700;font-size:15.5px}
.dossier-note{font-size:12px;color:var(--grey);margin:9px 0 2px;line-height:1.55}

/* timeline */
.timeline{display:flex;align-items:center;gap:14px;padding:12px 4px 4px;flex-wrap:wrap}
.play-btn{width:34px;height:34px;border-radius:50%;border:2px solid var(--brick);background:var(--card);
  color:var(--brick);font-size:13px;cursor:pointer;flex:0 0 34px}
.play-btn:hover{background:var(--brick);color:#fff}
.tl-year{font-family:var(--serif);font-weight:700;font-size:21px;color:var(--brick);min-width:52px}
.timeline input[type=range]{flex:1;min-width:180px;accent-color:var(--brick)}
.tl-note{font-size:13px;color:var(--grey)}

/* lower sections */
.strip{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;padding:26px 28px 4px}
.strip article{border-top:3px solid var(--brick);padding-top:10px}
.strip h3{font-family:var(--serif);font-size:19px;margin:0 0 6px}
.strip p{margin:0;color:#55503F;font-size:14px}
.essay{max-width:860px;margin:0 auto;padding:22px 28px 2px}
.essay h2{font-family:var(--serif);font-size:23px;border-bottom:1px solid var(--line);padding-bottom:8px}
.essay p{color:#3B382C}
.method-list{color:#3B382C;padding-left:20px}
.method-list li{margin:7px 0}
.site-footer{margin-top:34px;border-top:1px solid var(--line);padding:16px 28px 26px;
  font-family:var(--mono);font-size:12.5px;color:var(--grey)}
.site-footer .fine{font-family:var(--sans);max-width:900px}

/* popup */
.maplibregl-popup-content{font-family:var(--sans);border-radius:6px;border-top:4px solid var(--brick);padding:10px 14px}
.maplibregl-popup-content strong{font-family:var(--serif)}
.maplibregl-popup-content .pp-sub{color:var(--grey);font-size:12px}

/* responsive: keep the map dominant, panel folds above it */
@media (max-width:900px){
  .map-layout{flex-direction:column}
  .panel{width:auto;flex:none}
  .map-wrap{height:62vh;min-height:420px}
  .strip{grid-template-columns:1fr}
  .site-nav{gap:16px}
  .dossier{left:12px;right:12px;width:auto}
  .map-tagline h1{font-size:18px}
}
@media (min-width:901px){
  .map-wrap{height:calc(100vh - 250px);min-height:560px}
}