:root{
  /* ---- Light theme (default) ---- */
  --bg-deep:#eef1f6;
  --panel:#ffffff;
  --panel-2:#f3f6fa;
  --border:#d9e0ea;
  --cyan:#0e9c8e;
  --cyan-dim:#7fc9bd;
  --amber:#c17d13;
  --amber-dim:#e3b878;
  --red:#c94747;
  --green:#1f9d5c;
  --text:#16202e;
  --muted:#6b7688;

  --cyan-rgb:14,156,142;
  --amber-rgb:193,125,19;
  --panel-rgb:255,255,255;
  --scrim-rgb:10,20,35;

  --panel-shadow:0 20px 50px rgba(20,30,50,.12);
  --card-shadow-lg:0 30px 80px rgba(20,30,50,.12);
  --input-bg:#f5f7fb;
  --code-bg:#eef1f6;
  --keygate-bg:radial-gradient(circle at 30% 20%, #ffffff 0%, #e4e9f1 70%);
  --playhead-color:#16202e;
  --playhead-ring:0 0 0 1px rgba(255,255,255,.6), 0 0 10px var(--cyan);
  --error-bg:#fdeaea;
  --error-border:#f0bcbc;
  --error-text:#9b3030;
  --badge-text:#ffffff;

  --mono:'IBM Plex Mono', monospace;
  --sans:'Inter', sans-serif;
}
:root[data-theme="dark"]{
  --bg-deep:#0A0F1A;
  --panel:#111a2b;
  --panel-2:#0d1521;
  --border:#22304a;
  --cyan:#43d9c8;
  --cyan-dim:#2a6b64;
  --amber:#f2a93b;
  --amber-dim:#7a5a24;
  --red:#e85d5d;
  --green:#5ed48a;
  --text:#e7ecf3;
  --muted:#8b96ac;

  --cyan-rgb:67,217,200;
  --amber-rgb:242,169,59;
  --panel-rgb:17,26,43;
  --scrim-rgb:255,255,255;

  --panel-shadow:0 20px 50px rgba(0,0,0,.35);
  --card-shadow-lg:0 30px 80px rgba(0,0,0,.5);
  --input-bg:#0a1220;
  --code-bg:#0a1220;
  --keygate-bg:radial-gradient(circle at 30% 20%, #101c30 0%, #070b13 70%);
  --playhead-color:#ffffff;
  --playhead-ring:0 0 8px #fff, 0 0 14px var(--cyan);
  --error-bg:#2a1414;
  --error-border:#7a2c2c;
  --error-text:#ffb4b4;
  --badge-text:#04201d;
}
*{box-sizing:border-box;}
html,body{height:100%;}
#hud, #fleetPanel, #sidebar, #timeline, #keyGate .card{
  transition:background-color .25s ease, border-color .25s ease, box-shadow .25s ease;
}
body{
  margin:0;
  font-family:var(--sans);
  background:var(--bg-deep);
  color:var(--text);
  overflow:hidden;
  transition:background-color .25s ease, color .25s ease;
}
#app{
  position:relative;
  width:100%;
  height:100vh;
  min-height:560px;
  background:var(--bg-deep);
}

/* ---------- KEY GATE ---------- */
#keyGate{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  background:var(--keygate-bg);
  z-index:50;
  padding:24px;
}
#keyGate .card{
  width:100%;max-width:460px;
  background:linear-gradient(180deg, var(--panel), var(--panel-2));
  border:1px solid var(--border);
  border-radius:16px;
  padding:32px 30px;
  box-shadow:var(--card-shadow-lg);
}
#keyGate .eyebrow{
  font-family:var(--mono);
  letter-spacing:.14em;
  font-size:11px;
  color:var(--cyan);
  text-transform:uppercase;
  margin-bottom:10px;
}
#keyGate h1{
  font-size:22px;margin:0 0 8px 0;font-weight:700;letter-spacing:-.01em;
}
#keyGate p{
  color:var(--muted);font-size:13.5px;line-height:1.55;margin:0 0 20px 0;
}
#keyGate a{color:var(--cyan);text-decoration:none;border-bottom:1px solid var(--cyan-dim);}
#keyGate a:hover{border-bottom-color:var(--cyan);}
#keyGate code{background:var(--code-bg);border:1px solid var(--border);padding:1px 5px;border-radius:4px;font-family:var(--mono);font-size:11.5px;}
#keyInput{
  width:100%;
  background:var(--input-bg);
  border:1px solid var(--border);
  color:var(--text);
  font-family:var(--mono);
  font-size:13px;
  padding:12px 14px;
  border-radius:9px;
  outline:none;
  margin-bottom:12px;
}
#keyInput:focus{border-color:var(--cyan);}
#keyGate button{
  width:100%;
  background:var(--cyan);
  color:var(--badge-text);
  border:none;
  font-family:var(--sans);
  font-weight:700;
  font-size:14px;
  padding:12px 14px;
  border-radius:9px;
  cursor:pointer;
  transition:filter .15s ease, transform .1s ease;
}
#keyGate button:hover{filter:brightness(1.08);}
#keyGate button:active{transform:scale(.99);}
#keyGate button:focus-visible, #keyInput:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;}
#gateError{
  margin-top:14px;font-size:12.5px;color:var(--red);font-family:var(--mono);
  display:none;line-height:1.5;
}
#keyGate .demo-note{
  margin-top:16px;padding-top:16px;border-top:1px solid var(--border);
  font-size:12px;color:var(--muted);line-height:1.6;
}

/* ---------- MAIN APP ---------- */
#mapWrap{position:absolute;inset:0;display:none;flex-direction:column;}
#map{position:absolute;inset:0;}

/* HUD top bar */
#hud{
  position:absolute;top:0;left:0;right:0;z-index:10;
  display:flex;align-items:center;gap:0;
  background:linear-gradient(180deg, rgba(var(--panel-rgb),.94), rgba(var(--panel-rgb),.8));
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
  padding:14px 20px;
  flex-wrap:wrap;
}
#backBtn{
  display:none;
  flex:none;
  font-family:var(--mono);font-size:12px;font-weight:600;
  background:rgba(var(--cyan-rgb),.08);border:1px solid var(--cyan-dim);color:var(--cyan);
  padding:8px 12px;border-radius:8px;cursor:pointer;margin-right:16px;
}
#backBtn:hover{background:rgba(var(--cyan-rgb),.16);}
#backBtn.show{display:inline-flex;align-items:center;}
#hud .title-block{display:flex;flex-direction:column;margin-right:28px;}
#hud .eyebrow{
  font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--cyan);text-transform:uppercase;
}
#hud h1{font-size:16px;margin:2px 0 0 0;font-weight:700;}
.stat{
  display:flex;flex-direction:column;padding:0 18px;border-left:1px solid var(--border);
}
.stat .label{font-family:var(--mono);font-size:9.5px;letter-spacing:.1em;color:var(--muted);text-transform:uppercase;}
.stat .value{font-family:var(--mono);font-size:16px;font-weight:600;margin-top:3px;}
.stat .value.cyan{color:var(--cyan);}
.stat .value.amber{color:var(--amber);}
.hud-right{
  margin-right:32px;
  margin-left:auto;
  display:flex;align-items:center;gap:12px;
}
.updatedLabel{
  font-family:var(--mono);font-size:10.5px;color:var(--muted);white-space:nowrap;
}
#refreshBtn{
  flex:none;width:30px;height:30px;border-radius:50%;
  border:1px solid var(--border);background:rgba(var(--scrim-rgb),.04);color:var(--text);
  cursor:pointer;font-size:15px;line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:background .15s ease;
}
#refreshBtn:hover{background:rgba(var(--scrim-rgb),.08);}
#refreshBtn:disabled{cursor:default;opacity:.6;}
#refreshBtn.spinning{animation:fleetSpin .8s linear infinite;}
@keyframes fleetSpin{ to{ transform:rotate(360deg); } }
#statusBadge{
  font-family:var(--mono);font-size:11px;font-weight:600;letter-spacing:.08em;
  padding:6px 12px;border-radius:20px;
  border:1px solid var(--cyan-dim);
  color:var(--cyan);
  background:rgba(var(--cyan-rgb),.08);
  transition:all .25s ease;
  white-space:nowrap;
}
#statusBadge.stopped{
  border-color:var(--amber-dim);color:var(--amber);background:rgba(var(--amber-rgb),.1);
}
#statusBadge .dot{
  display:inline-block;width:6px;height:6px;border-radius:50%;background:currentColor;margin-right:7px;
  box-shadow:0 0 8px currentColor;
}

/* Fleet panel (left) */
#fleetPanel{
  position:absolute;top:82px;left:16px;bottom:96px;z-index:10;
  width:260px;
  background:rgba(var(--panel-rgb),.88);
  backdrop-filter:blur(10px);
  border:1px solid var(--border);
  border-radius:14px;
  display:flex;flex-direction:column;
  overflow:hidden;
  box-shadow:var(--panel-shadow);
}
#fleetList{overflow-y:auto;padding:8px;flex:1;}
#fleetList::-webkit-scrollbar{width:6px;}
#fleetList::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}
.carCard{
  display:flex;gap:10px;padding:11px;border-radius:10px;cursor:pointer;
  border:1px solid transparent;margin-bottom:6px;transition:background .15s ease, border-color .15s ease;
  align-items:flex-start;
}
.carCard:hover{background:rgba(var(--scrim-rgb),.04);border-color:var(--border);}
.carCard.selected{background:rgba(var(--cyan-rgb),.1);border-color:var(--cyan-dim);}
.carCard .statusDot{
  flex:none;width:10px;height:10px;border-radius:50%;margin-top:4px;
  box-shadow:0 0 6px currentColor;
}
.carCard .info{min-width:0;flex:1;}
.carCard .name{font-family:var(--mono);font-size:13px;font-weight:700;display:flex;justify-content:space-between;gap:6px;}
.carCard .name .statLabel{font-size:9.5px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;opacity:.85;}
.carCard .job{font-size:11.5px;color:var(--muted);margin-top:3px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.carCard .noFix{font-size:10.5px;color:var(--muted);font-family:var(--mono);margin-top:3px;font-style:italic;}

.emptyState, .loadingState, .errorState{
  padding:16px 12px;font-size:12.5px;color:var(--muted);line-height:1.6;
}
.errorState{color:var(--red);}

/* Sidebar */
#sidebar{
  position:absolute;top:82px;right:16px;bottom:96px;z-index:10;
  width:290px;
  background:rgba(var(--panel-rgb),.88);
  backdrop-filter:blur(10px);
  border:1px solid var(--border);
  border-radius:14px;
  display:flex;flex-direction:column;
  overflow:hidden;
  box-shadow:var(--panel-shadow);
}
#sidebar .sb-head{
  padding:14px 16px 10px 16px;border-bottom:1px solid var(--border);
}
#sidebar .sb-head .eyebrow{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;}
#sidebar .sb-head h2{font-size:14px;margin:4px 0 0 0;font-weight:700;}
#stopList{overflow-y:auto;padding:8px;flex:1;}
#stopList::-webkit-scrollbar{width:6px;}
#stopList::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}
.stopCard{
  display:flex;gap:10px;padding:11px;border-radius:10px;cursor:pointer;
  border:1px solid transparent;margin-bottom:6px;transition:background .15s ease, border-color .15s ease;
}
.stopCard:hover{background:rgba(var(--scrim-rgb),.04);border-color:var(--border);}
.stopCard.active{background:rgba(var(--amber-rgb),.1);border-color:var(--amber-dim);}
.stopCard .badge{
  flex:none;width:26px;height:26px;border-radius:50%;
  background:var(--amber);color:var(--badge-text);font-family:var(--mono);font-weight:700;font-size:12px;
  display:flex;align-items:center;justify-content:center;
}
.stopCard.start .badge{background:var(--green);}
.stopCard.end .badge{background:var(--red);}
.stopCard .info{min-width:0;}
.stopCard .name{font-size:12.5px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.stopCard .meta{font-family:var(--mono);font-size:10.5px;color:var(--muted);margin-top:3px;}
.stopCard .dur{font-family:var(--mono);font-size:10.5px;color:var(--amber);margin-top:2px;font-weight:600;}
.stopCard.start .dur, .stopCard.end .dur{color:var(--green);}

/* Timeline / scrubber */
#timeline{
  position:absolute;left:292px;right:322px;bottom:16px;z-index:10;
  background:rgba(var(--panel-rgb),.9);
  backdrop-filter:blur(10px);
  border:1px solid var(--border);
  border-radius:14px;
  padding:12px 16px 14px 16px;
  box-shadow:var(--panel-shadow);
}
#timeline.disabled{opacity:.5;pointer-events:none;}
#timeline .tl-top{display:flex;align-items:center;gap:12px;margin-bottom:10px;}
#playBtn{
  flex:none;width:34px;height:34px;border-radius:50%;border:1px solid var(--cyan-dim);
  background:rgba(var(--cyan-rgb),.1);color:var(--cyan);cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:13px;
}
#playBtn:hover{background:rgba(var(--cyan-rgb),.18);}
.speedBtn{
  font-family:var(--mono);font-size:11px;background:transparent;border:1px solid var(--border);
  color:var(--muted);padding:5px 9px;border-radius:7px;cursor:pointer;
}
.speedBtn.active{color:var(--cyan);border-color:var(--cyan-dim);background:rgba(var(--cyan-rgb),.08);}
#clockLabel{font-family:var(--mono);font-size:13px;color:var(--text);margin-left:auto;}
#barTrack{
  position:relative;height:26px;border-radius:6px;overflow:hidden;background:var(--bg-deep);
  border:1px solid var(--border);cursor:pointer;
}
.seg{position:absolute;top:0;bottom:0;}
.seg.drive{background:linear-gradient(180deg, var(--cyan), var(--cyan-dim));}
.seg.stop{background:linear-gradient(180deg, var(--amber), var(--amber-dim));}
#playhead{
  position:absolute;top:-4px;bottom:-4px;width:2px;background:var(--playhead-color);
  box-shadow:var(--playhead-ring);pointer-events:none;
}
#playhead::before{
  content:'';position:absolute;top:-5px;left:50%;transform:translateX(-50%);
  width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-top:6px solid var(--playhead-color);
}

#errorBanner{
  position:absolute;top:16px;left:50%;transform:translateX(-50%);z-index:60;
  background:var(--error-bg);border:1px solid var(--error-border);color:var(--error-text);
  font-family:var(--mono);font-size:12.5px;padding:10px 16px;border-radius:10px;
  display:none;max-width:520px;text-align:center;line-height:1.5;
}

#themeToggleBtn{
  position:absolute;top:16px;right:16px;z-index:70;
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--border);background:rgba(var(--panel-rgb),.85);color:var(--text);
  backdrop-filter:blur(10px);
  cursor:pointer;font-size:16px;line-height:1;
  display:flex;align-items:center;justify-content:center;
  box-shadow:var(--panel-shadow);
  transition:background .15s ease, color .15s ease;
}
#themeToggleBtn:hover{background:rgba(var(--scrim-rgb),.08);}

@media (max-width: 1050px){
  #fleetPanel{position:absolute;left:16px;right:16px;top:82px;bottom:auto;height:130px;width:auto;}
  #sidebar{position:absolute;left:16px;right:16px;top:auto;bottom:180px;height:130px;width:auto;}
  #timeline{left:16px;right:16px;bottom:16px;}
  .stat{padding:0 10px;}
  #hud .title-block{margin-right:14px;}
}