:root{
  --bg:#f6f7f9; --panel:#ffffff; --ink:#1f2429; --muted:#5f6b76;
  --line:#e3e7ec; --accent:#1a73e8; --accent-soft:#e8f0fe;
  --shadow:0 1px 2px rgba(60,64,67,.18), 0 2px 8px rgba(60,64,67,.10);
  --radius:12px;
}
*{box-sizing:border-box}
html,body{margin:0;height:100%}
body{font-family:Roboto,system-ui,Arial,sans-serif;color:var(--ink);background:var(--bg)}
.mono{font-family:"Roboto Mono",monospace}
.hidden{display:none !important}
a{color:var(--accent);text-decoration:none}

#app{display:flex;height:100vh;overflow:hidden}

/* ---------- sidebar ---------- */
#sidebar{
  width:340px;flex:0 0 340px;background:var(--panel);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:20px 20px 0;overflow-y:auto;
}
#sidebar header h1{font-size:20px;margin:0;font-weight:700;letter-spacing:-.2px}
#sidebar header .sub{margin:2px 0 14px;color:var(--muted);font-size:12.5px}
.view-tabs{margin:0 0 18px;flex:0 0 auto}
.view-tabs button{padding:9px 8px}
.control{margin-bottom:18px}
.control.last{margin-bottom:0}
.control>label{display:block;font-size:11px;font-weight:700;text-transform:uppercase;
  letter-spacing:.6px;color:var(--muted);margin-bottom:7px}
.control>label .hint{font-weight:500;text-transform:none;letter-spacing:0;color:#9aa0a6;font-size:10.5px}

.settings-panel{border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  margin:0 0 18px;padding:10px 0}
.settings-panel summary{list-style:none;cursor:pointer;font-size:11px;font-weight:700;
  text-transform:uppercase;letter-spacing:.6px;color:var(--muted);display:flex;align-items:center;
  justify-content:space-between}
.settings-panel summary::-webkit-details-marker{display:none}
.settings-panel summary::after{content:"+";font-size:18px;line-height:1;color:var(--accent)}
.settings-panel[open] summary{margin-bottom:14px}
.settings-panel[open] summary::after{content:"-"}

select{width:100%;padding:9px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;
  font-size:13px;background:var(--panel);cursor:pointer}
select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}

.segmented{display:flex;background:#eef1f4;border-radius:10px;padding:3px;gap:3px}
.segmented button{flex:1;border:0;background:transparent;padding:8px 6px;border-radius:8px;
  font:inherit;font-size:13px;font-weight:500;color:var(--muted);cursor:pointer;transition:.15s}
.segmented button.active{background:var(--panel);color:var(--accent);box-shadow:var(--shadow)}
.segmented.small button{padding:6px;font-size:12px}

/* weight sliders */
#weights .wrow{display:grid;grid-template-columns:96px 1fr 30px;align-items:center;gap:8px;margin-bottom:6px}
#weights .wrow label{font-size:12px;color:var(--ink)}
#weights .wrow .wval{font-family:"Roboto Mono",monospace;font-size:11px;color:var(--muted);text-align:right}
input[type=range]{width:100%;accent-color:var(--accent);cursor:pointer}
.link-btn{border:0;background:transparent;color:var(--accent);font:inherit;font-size:11.5px;
  cursor:pointer;padding:2px 0;margin-top:2px}
.link-btn:hover{text-decoration:underline}

/* add-city */
.add-row{display:flex;gap:6px}
#cityInput{flex:1;padding:9px 11px;border:1px solid var(--line);border-radius:10px;font:inherit;font-size:13px}
#cityInput:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.osm-id-input{width:100%;margin-top:6px;padding:8px 11px;border:1px solid var(--line);
  border-radius:10px;font:inherit;font-size:12px}
.osm-id-input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.go-btn{border:0;background:var(--accent);color:#fff;font:inherit;font-size:13px;font-weight:500;
  padding:0 14px;border-radius:10px;cursor:pointer}
.go-btn:hover{background:#1666d0}
.go-btn:disabled{background:#a9c4ef;cursor:default}
#buildProgress{margin-top:9px}
.pbar{height:8px;background:#eef1f4;border-radius:6px;overflow:hidden}
.pfill{height:100%;width:0;background:linear-gradient(90deg,#1a73e8,#4c94f5);
  border-radius:6px;transition:width .3s ease}
.pmsg{font-size:11px;color:var(--muted);margin-top:5px;min-height:14px}
.pmsg.err{color:#c5221f}

/* city metrics */
.stats-grid{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.mini-stat{background:#f4f6f9;border:1px solid #edf0f3;border-radius:8px;padding:7px 8px;min-width:0}
.mini-stat .k{font-size:9.5px;text-transform:uppercase;letter-spacing:.45px;color:var(--muted);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.mini-stat .v{font-family:"Roboto Mono",monospace;font-size:13px;font-weight:500;margin-top:2px}

.model-card{margin:0 0 18px;padding:11px 12px;border:1px solid #c9daf8;background:#f4f8ff;
  border-radius:10px;font-size:11px;line-height:1.45;color:var(--muted)}
.model-card .model-title{font-size:12px;font-weight:700;color:var(--ink);margin-bottom:4px}
.model-card .model-number{font-family:"Roboto Mono",monospace;font-size:17px;font-weight:700;
  color:var(--accent);margin:2px 0 5px}
.model-card .warn{color:#9a6700;margin-top:5px}
.model-card .model-weights{margin-top:6px;color:#3c4043;font-size:10px;line-height:1.45}

/* checkbox toggles */
.toggles{display:flex;flex-direction:column;gap:8px}
.chk{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink);cursor:pointer}
.chk input{accent-color:var(--accent);width:15px;height:15px;cursor:pointer}

/* legend */
#legend{margin-bottom:18px}
#legend .bar{height:12px;border-radius:6px;margin:4px 0}
#legend .ticks{display:flex;justify-content:space-between;font-size:10.5px;color:var(--muted)}
#legend .cap{font-size:11px;color:var(--muted);margin-bottom:2px}

/* top list */
.list-control{flex:1;min-height:120px}
#topList{margin:0;padding:0;list-style:none;counter-reset:r}
#topList li{counter-increment:r;display:flex;align-items:center;gap:10px;padding:7px 8px;border-radius:8px;
  cursor:pointer;font-size:13px}
#topList li:hover{background:#f0f3f7}
#topList li::before{content:counter(r);font-size:11px;font-weight:700;color:var(--muted);
  width:18px;text-align:right;flex:0 0 18px}
#topList .nm{flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
#topList .vl{font-family:"Roboto Mono",monospace;font-size:12px;color:var(--ink)}
#topList .swatch{width:10px;height:10px;border-radius:3px;flex:0 0 10px}

#sidebar footer{padding:14px 0;margin-top:8px;border-top:1px solid var(--line);
  font-size:11px;color:var(--muted)}
#matchNote{display:block;margin-bottom:4px}

/* ---------- map ---------- */
#mapWrap{position:relative;flex:1}
#map{position:absolute;inset:0}
#loading{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  background:var(--bg);color:var(--muted);font-size:14px;z-index:5}

#tooltip{position:absolute;z-index:10;pointer-events:none;background:#202124;color:#fff;
  padding:9px 12px;border-radius:10px;font-size:12.5px;box-shadow:var(--shadow);max-width:240px;
  transform:translate(-50%,-115%)}
#tooltip .t-name{font-weight:700;margin-bottom:3px}
#tooltip .t-val{font-family:"Roboto Mono",monospace;font-size:14px}
#tooltip .t-sub{color:#c9ccd1;font-size:11px;margin-top:3px}
#tooltip .t-muted{color:#9aa0a6}

/* downtown marker */
.cbd-marker{width:16px;height:16px;border-radius:50%;background:#ea4335;border:2.5px solid #fff;
  box-shadow:0 0 0 1px rgba(0,0,0,.25),var(--shadow)}

/* detail card */
#detail{position:absolute;top:16px;right:16px;width:320px;background:var(--panel);
  border-radius:var(--radius);box-shadow:var(--shadow);padding:16px 16px 12px;z-index:8}
#detailClose{position:absolute;top:8px;right:10px;border:0;background:transparent;font-size:22px;
  line-height:1;color:var(--muted);cursor:pointer}
#detailHead .d-name{font-size:16px;font-weight:700}
#detailHead .d-loc{font-size:12px;color:var(--muted);margin-top:1px}
#detailStats{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:12px 0}
#detailStats .stat{background:#f4f6f9;border-radius:8px;padding:8px 10px}
#detailStats .k{font-size:10px;text-transform:uppercase;letter-spacing:.5px;color:var(--muted)}
#detailStats .v{font-family:"Roboto Mono",monospace;font-size:15px;font-weight:500;margin-top:2px}
#detailStats .v small{font-size:11px;color:var(--muted)}
.up{color:#137333}.down{color:#c5221f}
.chart-wrap{position:relative;height:150px;margin-top:2px}
.detail-foot{font-size:10.5px;color:var(--muted);margin:6px 0 0}

@media (max-width:760px){
  #app{flex-direction:column}
  #sidebar{width:100%;flex:0 0 auto;max-height:46vh;border-right:0;border-bottom:1px solid var(--line)}
  #detail{width:auto;left:16px;right:16px}
}

/* Population qualification note spans both summary columns. */
.metro-note { grid-column: 1 / -1; font-size: 12px; line-height: 1.45; color: #6b5a32; padding: 6px 0; }