*{box-sizing:border-box;margin:0;padding:0}:root{--red:#ff2b2b;--green:#2bff7a;--dim:#7a7a7a;--bg:#050505}html,body{background:var(--bg);color:#e8e8e8;-webkit-user-select:none;user-select:none;width:100%;height:100%;font-family:Helvetica Neue,Helvetica,Arial,sans-serif;overflow:hidden}canvas{display:block}.hidden{display:none!important}#overlay-start,#overlay-pause,#overlay-survey,#overlay-fail,#overlay-end{text-align:center;z-index:40;background:#000000eb;flex-direction:column;justify-content:center;align-items:center;gap:18px;padding:24px;display:flex;position:fixed;inset:0}#overlay-quiz{z-index:50;background:#0a0a0a;flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:24px;display:flex;position:fixed;inset:0;overflow-y:auto}h1{letter-spacing:14px;color:var(--red);font-size:64px;font-weight:900}h2{letter-spacing:8px;color:var(--red);font-size:40px;font-weight:900}h3{font-size:22px;font-weight:600}.green{color:var(--green)}.red{color:var(--red)}.sub{max-width:640px;font-size:18px;line-height:1.6}.sub2{color:#b8b8b8;max-width:560px;font-size:15px;line-height:1.7}.warn{color:var(--red);font-weight:700}.fine{color:var(--dim);max-width:480px;font-size:12px;line-height:1.6}button{background:var(--red);color:#fff;letter-spacing:4px;cursor:pointer;border:none;padding:16px 44px;font-size:18px;font-weight:800;transition:transform .1s,background .15s}button:hover{background:#ff4b4b;transform:scale(1.03)}button:active{transform:scale(.97)}#hud{pointer-events:none;z-index:10;position:fixed;inset:0}#countdown{font-variant-numeric:tabular-nums;letter-spacing:3px;color:#fff;text-shadow:0 0 12px #fff6;font-size:34px;font-weight:900;position:absolute;top:16px;right:20px}#adcounter{letter-spacing:3px;color:var(--dim);font-size:12px;position:absolute;top:60px;right:20px}#crosshair{background:#ffffffd9;border-radius:50%;width:6px;height:6px;margin:-3px 0 0 -3px;position:absolute;top:50%;left:50%}#quiz-ad{border:1px solid #333;flex:none;width:256px;height:256px}#quiz-ad canvas{width:100%;height:100%}#quiz-progress{letter-spacing:3px;color:var(--dim);font-size:13px}#quiz-options{flex-direction:column;gap:10px;width:min(560px,90vw);display:flex}.quiz-opt{color:#e8e8e8;letter-spacing:1px;cursor:pointer;text-align:left;background:#161616;border:1px solid #2c2c2c;padding:14px 20px;font-size:16px;font-weight:600;transition:background .12s,border-color .12s}.quiz-opt:hover{border-color:var(--red);background:#222}.quiz-opt.correct{border-color:var(--green);color:#000;background:#0c3}.quiz-opt.wrong{border-color:var(--red);color:#fff;background:#c00}.flash-red{background:var(--red);opacity:0;pointer-events:none;z-index:60;animation:1.2s ease-out flashanim;position:fixed;inset:0}@keyframes flashanim{0%{opacity:.85}to{opacity:0}}