:root{color-scheme:dark;--ink:#eff7f3;--muted:#91a7a3;--accent:#e6a06f;--line:#dcefe72e}*{box-sizing:border-box}html,body{width:100%;height:100%;color:var(--ink);background:#061a1f;margin:0;font-family:Inter,Manrope,system-ui,sans-serif;overflow:hidden}button{font:inherit}#game-shell{background:radial-gradient(circle at 67% 14%,#3e7775,#061a1f 76%);width:100%;height:100%;min-height:520px;position:relative;overflow:hidden}#dive-canvas{outline:0;width:100%;height:100%;display:block}.is-hidden{display:none!important}.screen{z-index:10;background:linear-gradient(90deg,#031114f5,#031114b3 49%,#03111414 80%),linear-gradient(#0000 48%,#031114bd);flex-direction:column;justify-content:center;padding:clamp(24px,7vw,110px);display:flex;position:absolute;inset:0}.eyebrow{color:#9ee1cf;letter-spacing:.18em;align-items:center;gap:11px;margin:0;font:600 10px/1 ui-monospace,monospace;display:flex}.eyebrow i{background:currentColor;width:30px;height:1px}h1,h2{letter-spacing:-.06em;max-width:1000px;margin:18px 0 14px;font-size:clamp(48px,7.5vw,104px);font-weight:500;line-height:.86}h1 em,h2 em{color:var(--accent);font-style:normal;font-weight:400}.lede{color:#b6c8c3;max-width:680px;margin:8px 0 25px;font-size:clamp(15px,1.35vw,19px);line-height:1.62}.briefing{border-block:1px solid var(--line);gap:clamp(22px,5vw,65px);width:min(680px,100%);margin-bottom:30px;padding:17px 0;display:flex}.briefing span,.hud>div,.metrics span{gap:6px;display:grid}small{color:var(--muted);letter-spacing:.14em;font:600 9px/1 ui-monospace,monospace}.briefing b{font-size:12px}button{color:#1e211b;background:var(--accent);cursor:pointer;border:0;justify-content:space-between;align-items:center;width:min(275px,100%);height:58px;padding:0 21px;font-size:13px;font-weight:750;display:flex}.controls,.safety{color:#829b95;max-width:800px;margin:20px 0 0;font:500 9px/1.8 ui-monospace,monospace}.safety{color:#687f7b;margin-top:9px}kbd{font:inherit;color:#dbeae5;background:#d6eee414;border:1px solid #d6eee433;border-radius:3px;padding:3px 6px}.hud{z-index:5;pointer-events:none;background:linear-gradient(#020d0fc2,#0000);grid-template-columns:1fr auto 1fr;padding:28px 32px;display:grid;position:absolute;inset:0 0 auto}.hud strong{letter-spacing:.05em;font-size:12px}.objective{text-align:center}.metrics{text-align:right;grid-auto-flow:column;justify-self:end;gap:24px;display:flex!important}.metrics strong{font:500 15px/1 ui-monospace,monospace}.metrics i{color:var(--muted);font-size:9px;font-style:normal}.reticle{z-index:4;pointer-events:none;width:22px;height:22px;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.reticle:before,.reticle:after{content:"";background:#effff9b3;position:absolute}.reticle:before{width:1px;height:22px;left:10px}.reticle:after{width:22px;height:1px;top:10px}.reticle span{border:1px solid #e6a06fcc;border-radius:50%;position:absolute;inset:7px}.interaction{z-index:6;border:1px solid var(--line);background:#031314db;grid-template-columns:auto auto;align-items:center;gap:4px 9px;padding:11px 14px;display:grid;position:absolute;bottom:90px;left:50%;transform:translate(-50%)}.interaction kbd{grid-row:span 2}.interaction span{color:var(--muted);font:600 8px/1 ui-monospace,monospace}.interaction strong{font-size:11px}.toast{z-index:7;opacity:0;border-left:2px solid var(--accent);pointer-events:none;background:#031314e0;max-width:380px;padding:14px 18px;font-size:12px;line-height:1.45;transition:all .3s;position:absolute;bottom:32px;left:32px;transform:translateY(8px)}.toast.show{opacity:1;transform:none}.tip{z-index:5;color:#91a6a0;font:500 9px/1.4 ui-monospace,monospace;position:absolute;bottom:28px;right:32px}.complete-screen{text-align:center;background:#031113ed;align-items:center}.complete-screen h2{font-size:clamp(46px,6.8vw,90px)}.field-log{flex-wrap:wrap;justify-content:center;gap:8px;max-width:800px;margin:20px 0;display:flex}.field-log span{border:1px solid var(--line);padding:8px 11px;font:500 9px/1 ui-monospace,monospace}.population-brief{border:1px solid var(--line);background:#031618ad;gap:5px;max-width:580px;margin:0 0 14px;padding:10px 12px;display:grid}.population-brief b{font-size:11px}.population-brief span{color:#78928c;font:500 8px/1.45 ui-monospace,monospace}@media (width<=700px){.screen{justify-content:flex-end;padding:26px 20px 32px}.briefing span:last-child,.controls,.safety{display:none}.hud{grid-template-columns:1fr auto;padding:18px}.objective{width:90%;position:absolute;top:68px;left:50%;transform:translate(-50%)}.metrics span:nth-child(2),.tip{display:none}}@media (prefers-reduced-motion:reduce){.toast{transition:none}}