*{box-sizing:border-box}html,body{margin:0;width:100%;height:100%;overflow:hidden;background:linear-gradient(#dff6ff,#fff);font-family:"Segoe UI",Arial,sans-serif;color:#17324d;touch-action:none;user-select:none}#gameShell{position:fixed;inset:0;overflow:hidden}canvas{display:block;width:100vw;height:100vh}.hud{position:fixed;z-index:10;top:max(12px,env(safe-area-inset-top));left:50%;transform:translateX(-50%);display:grid;grid-template-columns:repeat(4,minmax(72px,1fr));gap:8px;width:min(620px,calc(100vw - 20px));transition:.2s}.hud.hidden{opacity:0;transform:translate(-50%,-15px);pointer-events:none}.hud div{background:rgba(255,255,255,.74);border:1px solid rgba(91,151,199,.25);border-radius:16px;padding:8px 6px;text-align:center;box-shadow:0 10px 25px rgba(30,80,120,.1);backdrop-filter:blur(12px)}.hud span{display:block;font-size:10px;text-transform:uppercase;letter-spacing:.08em;color:#5d7894}.hud b{display:block;font-size:clamp(16px,3vw,23px);line-height:1}.screen{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:18px;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .25s ease,transform .25s ease,visibility .25s ease;transform:scale(1.02);background:rgba(236,249,255,.48);backdrop-filter:blur(5px)}.screen.visible{opacity:1;visibility:visible;pointer-events:auto;transform:scale(1)}.panel{width:min(590px,calc(100vw - 32px));padding:clamp(24px,5vw,46px);background:rgba(255,255,255,.86);border:1px solid rgba(105,169,218,.35);border-radius:32px;text-align:center;box-shadow:0 22px 80px rgba(21,45,71,.25)}.panel.small{width:min(480px,calc(100vw - 32px))}.eyebrow{margin:0 0 8px;color:#3982b8;font-size:12px;text-transform:uppercase;letter-spacing:.13em;font-weight:900}.danger{color:#ef4444}h1,h2{margin:0;line-height:.92;letter-spacing:-.055em}h1{font-size:clamp(46px,10vw,84px)}h2{font-size:clamp(36px,7vw,62px)}.lede{margin:18px auto 22px;max-width:48ch;color:#365a78;line-height:1.45}.primary,.secondary,.mode-button,.touch-controls button{border:0;border-radius:999px;font:inherit;font-weight:900;cursor:pointer}.primary,.secondary{min-width:175px;padding:15px 24px;margin:6px;box-shadow:0 14px 30px rgba(55,104,145,.18)}.primary{background:linear-gradient(#ffe77a,#ffce2f);color:#1d2540}.secondary{background:white;color:#17324d;border:1px solid rgba(86,145,196,.24)}.mode-picker{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin:22px auto 8px;width:min(430px,100%)}.mode-button{padding:12px 10px;background:rgba(255,255,255,.72);color:#17324d;border:1px solid rgba(86,145,196,.24);font-size:13px}.mode-button.active{background:linear-gradient(#ffe77a,#ffce2f);border-color:rgba(255,206,47,.7)}.mode-description{margin:0 auto 14px;color:#5d7894;font-size:13px;line-height:1.35}.control-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:22px}.control-grid div{background:rgba(255,255,255,.65);border:1px solid rgba(86,145,196,.18);border-radius:18px;padding:12px 10px}.control-grid b,.control-grid span{display:block}.control-grid span{font-size:12px;color:#5d7894;margin-top:4px}#flash{position:fixed;inset:0;z-index:12;background:white;opacity:0;pointer-events:none;transition:opacity .08s}#flash.on{opacity:.56}.touch-controls{position:fixed;z-index:15;left:50%;bottom:max(16px,env(safe-area-inset-bottom));transform:translateX(-50%);display:none;gap:10px;pointer-events:none}.touch-controls button{pointer-events:auto;width:74px;height:58px;background:rgba(255,255,255,.7);border:1px solid rgba(67,130,184,.28);box-shadow:0 12px 28px rgba(37,88,129,.16);color:#17324d}.touch-controls .brake{width:92px;background:rgba(255,206,47,.78)}button:active{transform:translateY(2px)}@media (hover:none),(max-width:780px){.touch-controls{display:flex}.mode-picker,.control-grid{grid-template-columns:1fr}.hud{gap:6px}.hud div{border-radius:13px;padding:7px 3px}}