:root{
  --ink:#0b1210; --panel:#122019; --panel2:#182a21; --line:#28392f;
  --paper:#e9e4d6; --paper-dim:#a9b3ac; --brass:#c98a3c; --brass-hi:#e0a75c;
  --signal:#6fb3a0; --danger:#c9694b;
  color-scheme: dark;
}
@media (prefers-color-scheme: light){
  :root:not([data-theme="dark"]){ --paper-dim:#9aa39c; }
}
*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0; background:var(--ink); color:var(--paper);
  font-family:'Space Grotesk', system-ui, -apple-system, 'Segoe UI', sans-serif;
  overflow:hidden; height:100%;
  padding-top:env(safe-area-inset-top,0px); padding-bottom:env(safe-area-inset-bottom,0px);
}
.mono{ font-family:'IBM Plex Mono', ui-monospace, SFMono-Regular, Menlo, monospace; }

#landing{
  position:fixed; inset:0; display:flex; align-items:center; justify-content:center;
  padding:24px;
  background:
    radial-gradient(1200px 600px at 50% -10%, #16281f 0%, transparent 60%),
    var(--ink);
}
#landing::before{
  content:""; position:absolute; inset:0; opacity:.35; pointer-events:none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size:42px 42px;
  mask-image: radial-gradient(circle at 50% 30%, black, transparent 75%);
}
.card{
  position:relative; width:min(560px, 100%);
  background:linear-gradient(180deg, var(--panel2), var(--panel));
  border:1px solid var(--line); border-radius:14px;
  padding:34px 32px 28px; box-shadow:0 30px 80px -30px rgba(0,0,0,.7);
}
.card h1{
  margin:0 0 6px; font-size:26px; font-weight:700; letter-spacing:.2px;
}
.card h1 span{ color:var(--brass); }
.card p.sub{ margin:0 0 24px; color:var(--paper-dim); font-size:14.5px; line-height:1.55; max-width:60ch; }
#drop{
  border:1.5px dashed var(--line); border-radius:10px; padding:28px 20px;
  text-align:center; transition:border-color .15s, background .15s;
  background:rgba(0,0,0,.15);
}
#drop.drag{ border-color:var(--brass); background:rgba(201,138,60,.08); }
#drop p{ margin:0 0 14px; color:var(--paper-dim); font-size:13.5px; }
.btn{
  appearance:none; border:1px solid var(--line); background:var(--panel2); color:var(--paper);
  font:inherit; font-size:14px; font-weight:500; padding:10px 18px; border-radius:8px;
  cursor:pointer; transition:border-color .15s, transform .05s, background .15s;
}
.btn:hover{ border-color:var(--brass); }
.btn:active{ transform:scale(.98); }
.btn.primary{ background:var(--brass); border-color:var(--brass); color:#1a1206; font-weight:600; }
.btn.primary:hover{ background:var(--brass-hi); border-color:var(--brass-hi); }
.btn:focus-visible, [tabindex]:focus-visible{ outline:2px solid var(--signal); outline-offset:2px; }
.hint{ margin-top:16px; font-size:12px; color:var(--paper-dim); line-height:1.6; }
.hint b{ color:var(--paper); font-weight:500; }
#status{ margin-top:16px; font-size:13px; min-height:18px; }
#status.err{ color:var(--danger); }
#status.ok{ color:var(--signal); }

#groups{ margin-top:18px; display:none; flex-direction:column; gap:8px; }
.group-row{
  display:flex; align-items:center; justify-content:space-between; gap:12px;
  border:1px solid var(--line); border-radius:8px; padding:10px 14px;
  cursor:pointer; background:rgba(0,0,0,.15);
}
.group-row:hover{ border-color:var(--brass); }
.group-row .p{ font-size:13.5px; }
.group-row .p b{ display:block; font-size:14px; margin-bottom:2px; }
.group-row .count{ font-size:12px; color:var(--paper-dim); white-space:nowrap; }

#viewer{ position:fixed; inset:0; display:none; }
#mapCanvas{ position:absolute; inset:0; width:100%; height:100%; display:block; touch-action:none; cursor:grab; }
#mapCanvas.grabbing{ cursor:grabbing; }

.overlay{ position:absolute; pointer-events:none; }
.chip{
  pointer-events:auto;
  background:rgba(10,16,13,.72); backdrop-filter:blur(6px);
  border:1px solid var(--line); border-radius:8px;
  padding:6px 12px; font-size:12.5px; color:var(--paper);
}
#topbar{
  top:calc(10px + env(safe-area-inset-top,0px)); left:10px; right:10px;
  display:flex; align-items:center; gap:8px; justify-content:space-between;
}
#topbar .title{ display:flex; align-items:center; gap:8px; }
#topbar .title b{ font-weight:700; }
#topbar .title .dim{ color:var(--paper-dim); font-weight:400; }
#topbar .right{ display:flex; gap:8px; align-items:center; }
.icon-btn{
  pointer-events:auto; width:30px; height:30px; display:flex; align-items:center; justify-content:center;
  background:rgba(10,16,13,.72); border:1px solid var(--line); color:var(--paper);
  border-radius:8px; cursor:pointer; font-size:15px; line-height:1;
}
.icon-btn:hover{ border-color:var(--brass); }

#coordReadout{
  top:calc(10px + env(safe-area-inset-top,0px)); left:50%; transform:translateX(-50%);
}
#coordReadout span{ margin:0 6px; }

#zoomCluster{
  right:10px; bottom:calc(10px + env(safe-area-inset-bottom,0px));
  display:flex; flex-direction:column; align-items:flex-end; gap:6px;
}
#zoomBtns{ display:flex; gap:6px; }

#legend{
  left:10px; bottom:calc(10px + env(safe-area-inset-bottom,0px));
  font-size:12px; color:var(--paper-dim);
}

#tooltip{
  position:absolute; pointer-events:none; transform:translate(-50%,-130%);
  background:rgba(10,16,13,.92); border:1px solid var(--line); border-radius:6px;
  padding:5px 9px; font-size:12px; white-space:nowrap; display:none; z-index:5;
}
#tooltip b{ color:var(--brass-hi); }

@media (max-width:560px){
  .card{ padding:26px 20px 22px; }
  #legend{ display:none; }
  #topbar .title .dim{ display:none; }
}