/* Kriosfera: a terrain model on an instrument table. Single dark look by design. */
:root{
  color-scheme:dark;
  --bg:#070d11;
  --panel:rgba(9,19,25,.76);
  --panel-solid:#0b171e;
  --edge:rgba(143,227,255,.16);
  --edge-strong:rgba(143,227,255,.42);
  --ink:#e2edf1;
  --muted:#89a0aa;
  --faint:#4d6470;
  --ice:#8fe3ff;
  --ice-deep:#3fb4de;
  --loss:#e59c55;
  --f-display:"Unbounded","Onest",system-ui,sans-serif;
  --f-body:"Onest",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --f-data:"JetBrains Mono",ui-monospace,"SFMono-Regular",Menlo,Consolas,monospace;
  --gutter:max(16px,env(safe-area-inset-left,0px));
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html,body{background:var(--bg);margin:0}
body{color:var(--ink);font-family:var(--f-body);font-size:15px;line-height:1.5;
  padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px));
  padding-block:max(16px,env(safe-area-inset-top,0px)) max(40px,env(safe-area-inset-bottom,0px));
  background:radial-gradient(1200px 600px at 70% -10%,rgba(63,180,222,.10),transparent 60%),var(--bg);min-height:100vh}
img{max-width:100%}
[hidden]{display:none!important}
.wrap{max-width:1440px;margin:0 auto;display:grid;gap:26px}
a{color:var(--ice)}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--ice);outline-offset:2px}
.eyebrow{font-family:var(--f-data);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin:0}

.notice{max-width:1440px;margin:0 auto 14px;padding:10px 14px;border:1px solid var(--edge-strong);border-radius:10px;background:rgba(143,227,255,.07);font-size:14px}

/* header */
header.top{display:flex;flex-wrap:wrap;align-items:center;gap:12px 18px}
.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none}
.mark{width:30px;height:30px}
.wordmark{font-family:var(--f-display);font-weight:700;font-size:20px;letter-spacing:.08em}
.wordmark span{color:var(--ice)}
.tag{font-family:var(--f-data);font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);border:1px solid var(--edge);padding:3px 9px;border-radius:99px}
.seg{display:flex;border:1px solid var(--edge);border-radius:9px;overflow:hidden;background:var(--panel);margin-left:auto}
.seg button{background:none;border:0;padding:8px 12px;cursor:pointer;font-size:13px;color:var(--muted);min-height:36px}
.seg button[aria-pressed="true"]{background:var(--ice);color:#04131a;font-weight:600}

/* intro */
.intro{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);gap:16px 40px;align-items:end}
h1{font-family:var(--f-display);font-weight:600;font-size:clamp(26px,3.6vw,48px);line-height:1.08;margin:6px 0 0;letter-spacing:-.01em;text-wrap:balance}
h1 em{font-style:normal;color:var(--ice)}
.lede{margin:0;color:var(--muted);max-width:62ch}

/* stage */
.stagewrap{position:relative;display:grid}
.stage{position:relative;height:clamp(560px,78vh,880px);height:clamp(560px,78dvh,880px);border-radius:16px;overflow:hidden;border:1px solid var(--edge);background:radial-gradient(900px 500px at 50% 35%,#0f2129,#060b0e 75%)}
.stage:fullscreen{height:100%;border-radius:0;border:0}
.stage canvas{display:block;width:100%;height:100%;touch-action:none}
.stage::before,.stage::after{content:"";position:absolute;width:22px;height:22px;border:1.5px solid var(--edge-strong);pointer-events:none;z-index:3}
.stage::before{left:10px;top:10px;border-right:0;border-bottom:0}
.stage::after{right:10px;bottom:10px;border-left:0;border-top:0}
.labels{position:absolute;inset:0;pointer-events:none;overflow:hidden}
.lbl{position:absolute;left:0;top:0;white-space:nowrap;font-size:11.5px;color:var(--ink);text-shadow:0 1px 3px #000,0 0 8px #000;will-change:transform}
.lbl.city::before{content:"";display:inline-block;width:5px;height:5px;border-radius:50%;background:var(--ink);margin-right:6px;vertical-align:1px;box-shadow:0 0 0 2px rgba(0,0,0,.5)}
.lbl.range{font-family:var(--f-data);font-size:11px;letter-spacing:.22em;color:rgba(226,237,241,.72);font-weight:500}
.lbl.gap{font-family:var(--f-data);font-size:10.5px;letter-spacing:.06em;color:var(--ice);border:1px solid var(--edge-strong);background:rgba(5,14,19,.8);padding:3px 7px;border-radius:4px;text-shadow:none}
.lbl.pin{font-family:var(--f-data);font-size:10.5px;color:#04131a;background:var(--ice);padding:2px 6px;border-radius:3px;text-shadow:none;font-weight:600}
.lbl.pin.on{background:#fff;box-shadow:0 0 0 2px var(--ice)}

.panel{background:var(--panel);border:1px solid var(--edge);border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}
.hud-title{position:absolute;left:22px;top:22px;z-index:2;pointer-events:none;display:grid;gap:2px}
.year{font-family:var(--f-display);font-weight:400;font-size:clamp(46px,7vw,96px);line-height:.95;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.scen-name{font-family:var(--f-data);font-size:11.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--ice)}
.fs{position:absolute;z-index:3;right:300px;top:16px;width:38px;height:38px;border-radius:9px;border:1px solid var(--edge);background:var(--panel);display:grid;place-items:center;cursor:pointer;color:var(--ink)}
.fs svg{width:15px;height:15px}

.hud-stats{position:absolute;right:16px;top:16px;z-index:2;width:270px;padding:6px 0}
.hud-stats .row{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:10px;align-items:baseline;padding:9px 16px;border-bottom:1px solid var(--edge)}
.hud-stats .row:last-child{border-bottom:0}
.hud-stats .k{font-size:12px;color:var(--muted);line-height:1.3}
.hud-stats .v{font-family:var(--f-data);font-weight:600;font-size:19px;font-variant-numeric:tabular-nums}
.hud-stats .v.loss{color:var(--loss)}
.hud-stats .head{padding:8px 16px 4px}

.hud-presets{position:absolute;left:16px;top:50%;transform:translateY(-50%);z-index:2;display:grid;gap:6px}
.hud-presets button{display:flex;align-items:center;gap:8px;background:var(--panel);border:1px solid var(--edge);border-radius:8px;padding:8px 11px;cursor:pointer;font-size:12.5px;color:var(--ink);text-align:left;white-space:nowrap;min-height:36px;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px)}
.hud-presets button::before{content:"";flex:0 0 auto;width:7px;height:7px;border:1.5px solid var(--muted);transform:rotate(45deg)}
.hud-presets button[aria-pressed="true"]{border-color:var(--edge-strong)}
.hud-presets button[aria-pressed="true"]::before{background:var(--ice);border-color:var(--ice)}
.hud-presets button:hover{border-color:var(--edge-strong)}

.hud-read{position:absolute;left:22px;bottom:118px;z-index:2;font-family:var(--f-data);font-size:11.5px;color:var(--muted);pointer-events:none;display:grid;gap:3px;max-width:min(560px,60%)}
.hud-read b{color:var(--ink);font-weight:500}
.hud-read .ice{color:var(--ice)}

.hud-layers{position:absolute;right:16px;bottom:118px;z-index:3;width:250px;max-height:calc(100% - 140px);overflow:auto}
.hud-layers summary{list-style:none;cursor:pointer;padding:10px 14px;display:flex;justify-content:space-between;align-items:center;gap:10px;font-family:var(--f-data);font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}
.hud-layers summary::-webkit-details-marker{display:none}
.hud-layers summary::after{content:"+";font-size:14px}
.hud-layers[open] summary::after{content:"–"}
.hud-layers .body{padding:2px 14px 12px;display:grid;gap:7px;font-size:13px}
.hud-layers label{display:flex;align-items:center;gap:8px;cursor:pointer}
.hud-layers input[type=checkbox]{accent-color:var(--ice);width:16px;height:16px}
.hud-layers .rel{display:grid;gap:2px;margin-top:4px}
.hud-layers .rel span{font-family:var(--f-data);font-size:11px;color:var(--muted)}

.timeline{position:absolute;left:16px;right:16px;bottom:16px;z-index:2;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:16px;align-items:center;padding:12px 16px}
.play{width:46px;height:46px;border-radius:50%;border:1px solid var(--ice);background:var(--ice);color:#04131a;cursor:pointer;display:grid;place-items:center;box-shadow:0 0 24px rgba(143,227,255,.35)}
.play svg{width:16px;height:16px;fill:currentColor}
.track{display:grid;gap:4px;min-width:0}
.ticks{display:flex;justify-content:space-between;font-family:var(--f-data);font-size:10.5px;color:var(--muted)}
input[type=range]{width:100%;accent-color:var(--ice);margin:0;min-height:24px}
.scen{display:flex;gap:4px;flex-wrap:wrap}
.scen button{background:none;border:1px solid var(--edge);border-radius:7px;padding:6px 9px;cursor:pointer;font-family:var(--f-data);font-size:11.5px;color:var(--muted);display:grid;text-align:left;line-height:1.25;min-height:40px}
.scen button small{font-family:var(--f-body);font-size:10.5px;color:var(--faint)}
.scen button[aria-pressed="true"]{border-color:var(--ice);color:var(--ink);background:rgba(143,227,255,.08)}
.scen button[aria-pressed="true"] small{color:var(--muted)}
.loading{position:absolute;inset:0;display:grid;place-items:center;font-family:var(--f-data);font-size:12px;letter-spacing:.14em;color:var(--muted);text-transform:uppercase;z-index:4;pointer-events:none}

/* analysis */
.cards{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.25fr);gap:18px}
.card{padding:18px 20px;display:grid;gap:12px;align-content:start;min-width:0}
.card h2{font-size:17px;font-weight:600;margin:0}
.card .cap{font-size:12.5px;color:var(--muted);margin:0}
.towers{position:relative;height:300px;border-radius:10px;overflow:hidden;background:radial-gradient(400px 200px at 50% 90%,rgba(63,180,222,.12),transparent 70%)}
.towers canvas{display:block;width:100%;height:100%;cursor:pointer}
.tlabels{position:absolute;inset:0;pointer-events:none}
.tl{position:absolute;transform:translate(-50%,0);text-align:center;font-family:var(--f-data);font-size:11px;color:var(--muted);white-space:nowrap}
.tl b{display:block;color:var(--ink);font-size:13px}
.tl.on b{color:var(--ice)}
.chart svg{width:100%;height:auto;display:block}

/* register */
.reg-head{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:end;gap:12px}
.reg-head input{background:var(--panel-solid);border:1px solid var(--edge);border-radius:8px;padding:9px 12px;min-width:0;width:min(100%,320px);font-size:14px}
.tablewrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:620px}
th{text-align:left;font-family:var(--f-data);font-size:10.5px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);font-weight:500;padding:8px 10px;border-bottom:1px solid var(--edge)}
td{padding:10px;border-bottom:1px solid var(--edge);vertical-align:top}
td small{display:block;color:var(--muted);font-size:12px}
.n{text-align:right;font-family:var(--f-data);font-variant-numeric:tabular-nums}
td .go{background:none;border:1px solid var(--edge);border-radius:7px;padding:5px 10px;cursor:pointer;font-size:12px;white-space:nowrap;color:var(--ice)}
td .go:hover{border-color:var(--edge-strong)}

section.road{display:grid;gap:14px}
section.road h2,.src h2{font-size:18px;margin:0;font-weight:600}
.mods{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.mod{padding:16px;display:grid;gap:8px;align-content:start;min-width:0}
.mod h3{margin:0;font-size:15px;font-weight:600}
.mod p{margin:0;font-size:13px;color:var(--muted)}
.chip{justify-self:start;font-family:var(--f-data);font-size:10px;letter-spacing:.1em;text-transform:uppercase;padding:2px 8px;border-radius:99px;border:1px solid var(--edge);color:var(--muted)}
.mod.live{border-color:var(--edge-strong)}
.mod.live .chip{border-color:var(--ice);color:var(--ice)}
.src{display:grid;gap:8px;border-top:1px solid var(--edge);padding-top:18px}
.src ul{margin:0;padding-left:18px;font-size:13px;color:var(--muted);display:grid;gap:5px}
.stamp{font-family:var(--f-data);font-size:11px;color:var(--faint);margin:6px 0 0}
.note{font-size:12.5px;color:var(--muted);margin:0;max-width:90ch}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .intro,.cards{grid-template-columns:minmax(0,1fr)}
  .mods{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stage{height:clamp(440px,68vh,640px);height:clamp(440px,68dvh,640px)}
  .hud-presets{top:auto;bottom:14px;left:14px;right:14px;transform:none;display:flex;overflow-x:auto;gap:6px;padding-bottom:2px;scrollbar-width:none}
  .hud-presets::-webkit-scrollbar{display:none}
  .hud-presets button{flex:0 0 auto}
  .hud-read{bottom:66px;max-width:calc(100% - 44px)}
  .hud-layers{bottom:auto;top:14px;right:14px;width:210px}
  .hud-layers:not([open]){width:auto}
  .fs{top:auto;bottom:66px;right:14px}
  .hud-stats,.timeline{position:static;width:auto;margin-top:12px}
}
@media (max-width:620px){
  body{font-size:14.5px}
  .tag{display:none}
  .timeline{grid-template-columns:auto minmax(0,1fr);gap:12px;padding:12px}
  .timeline .scen{grid-column:1/-1}
  .scen button{flex:1 1 calc(50% - 4px)}
  .hud-title{left:16px;top:16px}
  .hud-layers{top:auto;bottom:62px;right:12px}
  .fs{top:12px;bottom:auto;right:12px}
  .hud-read{display:none}
  .stage{height:clamp(400px,62vh,560px);height:clamp(400px,62dvh,560px);border-radius:12px}
  .mods{grid-template-columns:minmax(0,1fr)}
  .card{padding:16px}
  .towers{height:250px}
}
/* phones held sideways: give the model the screen */
@media (max-height:520px) and (orientation:landscape){
  .stage{height:calc(100vh - 32px);height:calc(100dvh - 32px);min-height:300px}
  .year{font-size:40px}
  .hud-layers{display:none}
  .hud-presets{bottom:10px}
  .hud-read{display:none}
}
@media (pointer:coarse){.hud-layers label{min-height:30px}}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}}