:root{
  --bg:#0e1116; --bg2:#141922; --panel:#171d27; --panel2:#1c2330;
  --line:#28313f; --line2:#33404f;
  --ink:#e8edf5; --ink2:#a4b1c2; --ink3:#6d7c8f;
  --amber:#ffb020; --amber-dim:#8a5e12;
  --free:#2ecc8f; --slow:#ffb020; --jam:#ff5a52; --off:#5b6a7d;
  /* The vendored Barlow / IBM Plex Mono files are Latin-only, so every Chinese
     string falls through to these system CJK faces. Keep them ahead of the
     generic families: a generic in the list ends the lookup. */
  --cjk:"PingFang HK","PingFang TC","Hiragino Sans CN","Microsoft JhengHei","Noto Sans HK","Noto Sans TC";
  --mono:"IBM Plex Mono",ui-monospace,SFMono-Regular,Menlo,var(--cjk),monospace;
  --disp:"Barlow Semi Condensed",system-ui,var(--cjk),sans-serif;
  --body:"Barlow",system-ui,-apple-system,var(--cjk),sans-serif;
  --r:10px;
}
*{box-sizing:border-box}
/* Author display rules below outrank the UA sheet, so [hidden] needs enforcing. */
[hidden]{display:none!important}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--body);font-size:15px;line-height:1.45;
  -webkit-font-smoothing:antialiased;display:flex;flex-direction:column;
  background-image:radial-gradient(1100px 500px at 78% -12%,rgba(255,176,32,.07),transparent 60%);
}
button,input,select{font:inherit;color:inherit}
h2{margin:0;font-family:var(--disp);font-weight:600;letter-spacing:.01em}
b,strong{font-weight:600}

/* ---------- topbar ---------- */
.topbar{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding:12px 20px;background:linear-gradient(180deg,var(--bg2),var(--bg));
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40;
}
.brand{display:flex;align-items:center;gap:11px;margin-right:auto}
.brand-mark{
  width:13px;height:13px;border-radius:3px;background:var(--amber);
  box-shadow:0 0 0 3px rgba(255,176,32,.16),0 0 18px rgba(255,176,32,.5);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text b{font-family:var(--disp);font-size:21px;font-weight:700;letter-spacing:.005em}
.brand-text small{font-size:11.5px;color:var(--ink3);letter-spacing:.04em;text-transform:uppercase}

.topbar-status{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--ink2)}
.pill{display:inline-flex;align-items:center;gap:7px;padding:4px 11px;border-radius:999px;
  border:1px solid var(--line2);background:var(--panel);font-size:12px;font-weight:500}
.pill .dot{width:7px;height:7px;border-radius:50%;background:var(--ink3);display:block}
.pill-live{border-color:rgba(46,204,143,.4)} .pill-live .dot{background:var(--free);box-shadow:0 0 8px var(--free);animation:pulse 2s infinite}
.pill-stale{border-color:rgba(255,176,32,.45)} .pill-stale .dot{background:var(--slow)}
.pill-err{border-color:rgba(255,90,82,.45)} .pill-err .dot{background:var(--jam)}
@keyframes pulse{50%{opacity:.35}}
.meta{font-family:var(--mono);font-size:11.5px;color:var(--ink3);white-space:nowrap}
.meta b{color:var(--ink2)}

.topbar-controls{display:flex;align-items:center;gap:12px}
.seg{display:flex;border:1px solid var(--line2);border-radius:8px;overflow:hidden;background:var(--panel)}
.seg button{background:none;border:0;padding:6px 11px;font-size:12.5px;color:var(--ink3);cursor:pointer}
.seg button+button{border-left:1px solid var(--line2)}
.seg button.on{background:var(--amber);color:#1a1204;font-weight:600}
.seg button:hover:not(.on){color:var(--ink)}

.switch{display:inline-flex;align-items:center;gap:9px;background:var(--panel);
  border:1px solid var(--line2);border-radius:999px;padding:5px 14px 5px 10px;cursor:pointer;
  font-size:13px;font-weight:500;transition:.18s}
.switch:hover{border-color:var(--ink3)}
.switch-led{width:9px;height:9px;border-radius:50%;background:var(--ink3);transition:.18s}
.switch.on{border-color:var(--amber);background:rgba(255,176,32,.1);color:var(--amber)}
.switch.on .switch-led{background:var(--amber);box-shadow:0 0 10px var(--amber)}
.switch.busy{opacity:.6;pointer-events:none}

/* ---------- alert banner ---------- */
.alert{display:flex;align-items:center;gap:13px;margin:14px 20px 0;padding:13px 16px;
  border-radius:var(--r);border:1px solid rgba(255,90,82,.45);
  background:linear-gradient(90deg,rgba(255,90,82,.16),rgba(255,90,82,.05));
  animation:slide .3s ease-out}
@keyframes slide{from{opacity:0;transform:translateY(-8px)}}
.alert-icon{color:var(--jam);font-size:15px}
.alert-body{flex:1;min-width:0;display:flex;flex-wrap:wrap;gap:4px 10px;align-items:baseline}
.alert-body b{font-family:var(--disp);font-size:17px;font-weight:600}
.alert-body span{font-size:13px;color:var(--ink2)}
.alert-go{background:var(--jam);color:#fff;border:0;border-radius:7px;padding:7px 14px;font-size:13px;font-weight:600;cursor:pointer}
.alert-x{background:none;border:0;color:var(--ink3);font-size:21px;line-height:1;cursor:pointer;padding:0 4px}
.alert-x:hover{color:var(--ink)}

/* ---------- stage ---------- */
.stage{flex:1;display:grid;grid-template-columns:1fr 430px;gap:0;min-height:0}
.mapwrap{position:relative;min-height:380px}
#map{position:absolute;inset:0;background:#0a0d12}
.legend{position:absolute;left:14px;bottom:14px;z-index:500;display:flex;gap:14px;flex-wrap:wrap;
  background:rgba(14,17,22,.9);backdrop-filter:blur(6px);border:1px solid var(--line2);
  border-radius:8px;padding:8px 13px;font-size:11.5px;color:var(--ink2)}
.legend span{display:flex;align-items:center;gap:6px}
.legend em{font-style:normal}
.sw{width:9px;height:9px;border-radius:50%;display:block}
.sw.free{background:var(--free)} .sw.slow{background:var(--slow)}
.sw.jam{background:var(--jam)} .sw.off{background:var(--off)}
.map-note{position:absolute;right:14px;top:14px;z-index:500;max-width:270px;
  background:rgba(14,17,22,.92);border:1px solid var(--line2);border-radius:8px;
  padding:9px 12px;font-size:12px;color:var(--ink2)}

/* leaflet dark */
.leaflet-container{font-family:var(--body)}
.leaflet-control-zoom a{background:var(--panel)!important;color:var(--ink)!important;border-color:var(--line2)!important}
.leaflet-control-attribution{background:rgba(14,17,22,.8)!important;color:var(--ink3)!important;font-size:10px!important}
.leaflet-control-attribution a{color:var(--ink2)!important}
.leaflet-popup-content-wrapper,.leaflet-popup-tip{background:var(--panel2)!important;color:var(--ink)!important;
  border:1px solid var(--line2)!important;box-shadow:0 10px 30px rgba(0,0,0,.5)!important}
.leaflet-popup-content{margin:12px 14px;font-size:13px}
.pp-name{font-family:var(--disp);font-size:15px;font-weight:600;margin-bottom:2px}
.pp-road{font-size:12px;color:var(--ink3);margin-bottom:9px}
.pp-grid{display:grid;grid-template-columns:auto auto;gap:3px 14px;font-family:var(--mono);font-size:12px}
.pp-grid span{color:var(--ink3)}
.pp-state{display:inline-block;margin-top:9px;font-size:11px;padding:2px 8px;border-radius:999px;font-weight:600;text-transform:uppercase;letter-spacing:.04em}

/* ---------- panel ---------- */
.panel{background:var(--panel);border-left:1px solid var(--line);display:flex;flex-direction:column;
  overflow-y:auto;overflow-x:hidden}
.panel-head{padding:18px 20px 12px;border-bottom:1px solid var(--line)}
.panel-head h2{font-size:20px}
.panel-sub{margin:5px 0 0;font-size:12.5px;color:var(--ink3);min-height:17px}
.controls{padding:14px 20px;border-bottom:1px solid var(--line);display:flex;flex-direction:column;gap:12px}
.field{display:flex;flex-direction:column;gap:6px;flex:1}
.field.grow{flex:1}
.field-lbl{font-size:11.5px;color:var(--ink3);letter-spacing:.03em;text-transform:uppercase;display:flex;justify-content:space-between}
.field-lbl b{font-family:var(--mono);color:var(--amber);text-transform:none;letter-spacing:0}
.field input[type=search]{background:var(--bg2);border:1px solid var(--line2);border-radius:8px;
  padding:9px 12px;font-size:14px;width:100%}
.field input[type=search]:focus{outline:none;border-color:var(--amber)}
.row{display:flex;gap:12px;align-items:flex-end}
input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:3px;background:var(--line2);border-radius:2px}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:15px;height:15px;border-radius:50%;
  background:var(--amber);cursor:pointer;box-shadow:0 0 0 3px rgba(255,176,32,.18)}
input[type=range]::-moz-range-thumb{width:15px;height:15px;border:0;border-radius:50%;background:var(--amber);cursor:pointer}
.check{display:flex;align-items:flex-start;gap:9px;font-size:13px;color:var(--ink2);cursor:pointer}
.check input{margin-top:2px;accent-color:var(--amber);width:15px;height:15px}
.check small{color:var(--ink3);font-size:11.5px}

.locate-hint{padding:16px 20px;border-bottom:1px solid var(--line);background:rgba(255,176,32,.04)}
.locate-hint p{margin:0 0 8px;font-size:13px;color:var(--ink2)}
.locate-hint .fineprint{font-size:11.5px;color:var(--ink3);margin:0}

.cards{list-style:none;margin:0;padding:12px 14px 4px;display:flex;flex-direction:column;gap:9px}
.card{background:var(--panel2);border:1px solid var(--line);border-left:3px solid var(--off);
  border-radius:var(--r);padding:12px 14px;cursor:pointer;transition:.15s}
.card:hover{border-color:var(--line2);background:#212a38}
.card.focus{outline:2px solid var(--amber);outline-offset:1px}
.card.free{border-left-color:var(--free)} .card.slow{border-left-color:var(--slow)}
.card.jam{border-left-color:var(--jam)} .card.off{border-left-color:var(--off)}
.c-top{display:flex;align-items:baseline;gap:8px;margin-bottom:3px}
.c-name{font-family:var(--disp);font-size:15.5px;font-weight:600;flex:1;min-width:0}
.c-dist{font-family:var(--mono);font-size:12px;color:var(--amber);white-space:nowrap}
.c-road{font-size:12px;color:var(--ink3);margin-bottom:9px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.c-figs{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.fig{display:flex;flex-direction:column;line-height:1.15}
.fig b{font-family:var(--mono);font-size:16px;font-weight:500}
.fig span{font-size:10px;color:var(--ink3);text-transform:uppercase;letter-spacing:.05em}
.tag{margin-left:auto;font-size:10px;padding:3px 9px;border-radius:999px;font-weight:600;
  text-transform:uppercase;letter-spacing:.05em;align-self:flex-start}
.tag.free{background:rgba(46,204,143,.15);color:var(--free)}
.tag.slow{background:rgba(255,176,32,.15);color:var(--slow)}
.tag.jam{background:rgba(255,90,82,.17);color:var(--jam)}
.tag.off{background:rgba(91,106,125,.2);color:var(--off)}
.trend{font-family:var(--mono);font-size:11px}
.trend.up{color:var(--jam)} .trend.down{color:var(--free)} .trend.flat{color:var(--ink3)}
.c-dir{font-size:11px;color:var(--ink3);font-family:var(--mono)}

.empty{padding:28px 22px;text-align:center;color:var(--ink3);font-size:13px}
.search-results{padding:8px 14px 18px;display:flex;flex-direction:column;gap:5px}
.sr-head{font-size:11.5px;color:var(--ink3);text-transform:uppercase;letter-spacing:.04em;padding:8px 6px 4px}
.sr{background:var(--panel2);border:1px solid var(--line);border-radius:8px;padding:9px 12px;
  cursor:pointer;font-size:13px;text-align:left;width:100%;display:flex;gap:9px;align-items:center}
.sr:hover{border-color:var(--amber)}
.sr.sel{border-color:var(--amber);background:#212a38}
.sr span{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.sr small{color:var(--ink3);font-size:11.5px;margin-left:auto;font-family:var(--mono);white-space:nowrap}
.sr-dot{width:8px;height:8px;border-radius:50%;flex:none;background:var(--off)}
.sr-dot.free{background:var(--free)} .sr-dot.slow{background:var(--slow)}
.sr-dot.jam{background:var(--jam)} .sr-dot.off{background:var(--off)}

.panel-foot{margin-top:auto;padding:16px 20px 20px;border-top:1px solid var(--line)}
.panel-foot p{margin:0;font-size:11.5px;line-height:1.55;color:var(--ink3)}

@media (max-width:1080px){
  .stage{grid-template-columns:1fr}
  .mapwrap{height:44vh;min-height:300px}
  .panel{border-left:0;border-top:1px solid var(--line)}
  .hide-sm{display:none}
}
@media (max-width:620px){
  .topbar{padding:10px 14px;gap:10px}
  .brand-text small{display:none}
  .topbar-status{order:3;width:100%}
  .alert{margin:10px 14px 0}
  .panel-head,.controls,.locate-hint{padding-left:14px;padding-right:14px}
}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}