:root{color-scheme:dark;--cyan:#91fbe9;--muted:#84959e;--line:#28383e;--gold:#e9c695}*{box-sizing:border-box}body{margin:0;background:#080c12;color:#edf7f5;font:15px system-ui,-apple-system,Segoe UI,sans-serif}button,select,input{font:inherit}button,select{color:inherit;background:#141f28;border:1px solid #3a5158;border-radius:7px;padding:10px 15px;cursor:pointer}button:hover{background:#233841;border-color:var(--cyan)}button:focus-visible,select:focus-visible,input:focus-visible{outline:2px solid var(--gold);outline-offset:3px}button.primary{background:var(--cyan);color:#092821;border:0;font-weight:750}button:disabled{opacity:.4;cursor:default}#app{height:100vh;height:100dvh;max-width:1360px;margin:auto;padding:max(12px,env(safe-area-inset-top)) max(18px,env(safe-area-inset-right)) max(8px,env(safe-area-inset-bottom)) max(18px,env(safe-area-inset-left));display:grid;grid-template-rows:auto auto minmax(0,1fr) auto auto;gap:12px}header{display:flex;align-items:center;justify-content:space-between;gap:10px}.brand{display:flex;align-items:center;gap:12px;letter-spacing:3px;font-size:17px}.brand b{color:var(--cyan);font-weight:500}.brand small{display:block;font:9px monospace;letter-spacing:3px;color:var(--muted);margin-top:5px}.emblem{font-size:36px;color:var(--cyan)}nav{display:flex;gap:6px}nav button{font-size:12px;padding:8px 12px}.hud{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding:12px 4px 0;gap:12px}.hud small{display:block;color:var(--muted);font:10px monospace;letter-spacing:2px;margin-bottom:5px}.hud strong{font:24px monospace;font-weight:500}.hyper strong{font-size:16px;color:var(--cyan)}meter{display:block;width:100%;height:5px;margin-top:4px;accent-color:var(--cyan)}#arena{position:relative;min-height:0;background:#020506;border:1px solid #31474d;border-radius:10px;overflow:hidden;box-shadow:0 12px 50px #0008;display:flex;align-items:center;justify-content:center}canvas{display:block;max-width:100%;max-height:100%}#scan{position:absolute;inset:0;pointer-events:none;display:none;background:repeating-linear-gradient(0deg,transparent 0 3px,#0003 3px 4px)}body.crt #scan{display:block}#banner{position:absolute;top:9%;left:0;right:0;text-align:center;color:var(--gold);font:14px monospace;letter-spacing:3px;pointer-events:none}#overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#03090dbb;backdrop-filter:blur(3px);padding:16px}#overlay.hidden{display:none}#panel{max-height:100%;overflow:auto;width:540px;max-width:100%;text-align:center;padding:20px 28px;border:1px solid #3b5259;border-radius:12px;background:linear-gradient(145deg,#111e27f5,#080f16f5);box-shadow:0 16px 60px #0008}h1{font-weight:300;font-size:clamp(28px,4vw,50px);letter-spacing:5px;line-height:1.12;margin:10px 0 16px}h1 span{display:block;color:var(--cyan);font-weight:650}h2{font-weight:450;letter-spacing:2px;margin-top:5px}.eyebrow{font:10px monospace;letter-spacing:3px;color:var(--gold)}.intro{color:#adbec5;line-height:1.6}.menu{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin-top:16px}.wide{grid-column:1/-1}.choice{display:flex;justify-content:space-between;align-items:center;gap:12px;margin:12px 0}.choice select{flex:1;max-width:180px}input[type=range]{width:150px;accent-color:var(--cyan)}input[type=checkbox]{width:20px;height:20px;accent-color:var(--cyan)}input[type=text]{background:#050c10;border:1px solid #46616a;color:white;padding:12px;border-radius:5px;width:100%}.hint{font:11px monospace;color:var(--muted);line-height:1.6}.instructions{text-align:left;font-size:13px;line-height:1.6;color:#b9cbd0}.instructions b{color:#e5f8f4}table{border-collapse:collapse;width:100%;font-size:12px}td,th{padding:8px 4px;text-align:left;border-bottom:1px solid var(--line)}th{color:var(--muted)}#controls{display:flex;align-items:center;justify-content:space-between;gap:8px;touch-action:none;user-select:none}#controls button{min-width:68px;height:62px;font-size:27px;line-height:1;touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none}#controls small{display:block;font:9px monospace;letter-spacing:1px;margin-top:5px}#controls button.held{background:#345750;border-color:var(--cyan);color:var(--cyan)}#controls .fire{border-color:#81cbbb;color:var(--cyan)}.cluster{display:flex;gap:8px}#jump{color:var(--gold)}footer{display:flex;justify-content:space-between;font:9px monospace;letter-spacing:2px;color:var(--muted)}@media(max-width:600px){#app{padding:8px max(8px,env(safe-area-inset-right)) max(7px,env(safe-area-inset-bottom)) max(8px,env(safe-area-inset-left));gap:8px}.brand{font-size:11px;letter-spacing:1px;gap:5px}.brand b{display:block}.brand small{display:none}.emblem{font-size:27px}nav button{padding:8px;font-size:10px}.hud{padding-top:8px}.hud strong{font-size:20px}.hud small{font-size:9px;letter-spacing:1px}.hyper strong{font-size:12px}#controls button{min-width:54px;width:54px;height:68px;padding:6px}.cluster{gap:5px}#panel{padding:16px}#overlay{padding:10px}h1{font-size:31px;margin:9px 0}.intro{font-size:12px}.menu{margin-top:10px;gap:7px}.menu button{padding:10px}footer{font-size:8px;letter-spacing:.5px}}@media(max-height:500px) and (orientation:landscape){#app{grid-template-columns:104px 1fr 104px;grid-template-rows:auto minmax(0,1fr) 12px;gap:5px;padding-top:5px}header{grid-column:1/-1}.brand small{display:none}.brand{font-size:12px}.emblem{font-size:26px}.hud{grid-column:1;grid-row:2;flex-direction:column;justify-content:center;gap:14px;padding:8px;border:0}.hud strong{font-size:19px}.hud small{font-size:9px}.hyper strong{font-size:12px}#arena{grid-column:2;grid-row:2}#controls{grid-column:3;grid-row:2;display:flex;flex-direction:column;justify-content:center;gap:6px}.cluster{gap:4px}#controls button{min-width:45px;width:45px;height:49px;font-size:22px;padding:4px}#controls small{font-size:8px}#jump{width:96px!important}footer{grid-column:1/-1;font-size:8px}#panel{padding:12px 20px}h1{font-size:29px}.intro{margin:8px 0;font-size:12px}.menu{margin-top:8px}.menu button{padding:7px}#overlay{padding:5px}}

/* Mark the fixed square flight boundary, including letterboxed layouts. */
#arena{background:radial-gradient(ellipse at center,#081116,#04080c)}canvas{border:1px solid #1c3338;border-radius:2px}
@media(max-height:500px) and (orientation:landscape){#controls{display:contents}.hud{justify-content:flex-start;gap:10px}.cluster:first-child{grid-column:1;grid-row:2;align-self:end;justify-self:center}.cluster:last-child{grid-column:3;grid-row:2;align-self:end;justify-self:center}#jump{grid-column:3;grid-row:2;align-self:center;justify-self:center}}

/* Games navigation uses normal header/menu flow, never the playfield overlay. */
a.return-games{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:6px 10px;box-sizing:border-box;color:inherit;font:600 13px/1.25 system-ui,sans-serif;letter-spacing:normal;text-decoration:underline;text-underline-offset:3px;white-space:nowrap;border-radius:5px}
a.return-games:hover{background:#ffffff14}a.return-games:focus-visible{outline:2px solid currentColor;outline-offset:2px}
header{flex-wrap:wrap}header nav{flex-wrap:wrap}header .return-games{color:var(--cyan)}