*{box-sizing:border-box}
html,body{height:100%;margin:0}
body{display:flex;flex-direction:column;font:15px/1.45 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:#1d2330;background:#f4f1ea}
header{padding:10px 18px;background:#1d2330;color:#fff}
header h1{margin:0;font-size:20px}
header p{margin:2px 0 0;font-size:13px;opacity:.75}
main{flex:1;display:flex;min-height:0}
#mapwrap{flex:1;position:relative;min-width:0}
#map{position:absolute;inset:0;background:#cfe3ee}
#banner{position:absolute;z-index:500;top:10px;left:50%;transform:translateX(-50%);max-width:80%;background:#fff3cd;border:1px solid #e0c36a;padding:6px 12px;border-radius:6px;font-size:13px;box-shadow:0 1px 4px #0003}
#layers{position:absolute;z-index:500;top:10px;right:10px;background:#fffd;padding:6px 10px;border-radius:6px;font-size:13px;display:flex;flex-direction:column;gap:2px;box-shadow:0 1px 4px #0003}
#legend{position:absolute;z-index:500;left:10px;bottom:10px;background:#fffe;padding:6px 10px;border-radius:6px;font-size:12px;box-shadow:0 1px 4px #0003}
#legend div{display:flex;align-items:center;gap:6px;margin:2px 0}
#legend i{width:14px;height:14px;border-radius:3px;display:inline-block;border:1px solid #0004}
#panel{width:380px;overflow:auto;padding:16px 18px;background:#fff;border-left:1px solid #ddd}
.era{display:inline-block;color:#fff;font-size:12px;padding:2px 8px;border-radius:10px}
#panel h2{margin:8px 0 2px;font-size:22px;line-height:1.2}
.years{color:#667;font-size:14px;margin-bottom:8px}
#panel h3{margin:14px 0 4px;font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:#667}
#panel ul{margin:0;padding-left:18px}
#panel li{margin:2px 0}
.ev b{color:#c62828}
.caution{margin-top:12px;padding:8px 10px;background:#fff3cd;border-left:4px solid #e0a800;font-size:13px}
.stat{display:flex;gap:16px;margin-top:10px}
.stat div{background:#f4f1ea;border-radius:6px;padding:6px 10px;font-size:12px;color:#556}
.stat b{display:block;font-size:16px;color:#1d2330}
nav#timeline{background:#ece8de;border-top:1px solid #d6d0c2;padding:8px 12px}
#controls{display:flex;gap:8px;align-items:center}
#controls button{width:34px;height:30px;border:1px solid #bbb;background:#fff;border-radius:6px;font-size:16px;cursor:pointer}
#slider{flex:1}
#chips{display:flex;gap:4px;overflow-x:auto;padding:8px 0 2px}
.chip{flex:0 0 auto;border:0;border-bottom:4px solid var(--c);background:#fff;padding:4px 8px;font-size:12px;cursor:pointer;border-radius:4px 4px 0 0;white-space:nowrap}
.chip.active{background:var(--c);color:#fff}
footer{padding:4px 14px;font-size:11px;color:#667;background:#ece8de}
.leaflet-tooltip{font-size:12px}
@media(max-width:800px){
  main{flex-direction:column}
  #mapwrap{flex:0 0 46%}
  #panel{width:auto;border-left:0;border-top:1px solid #ddd}
}