:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;color-scheme:dark}*{box-sizing:border-box}html,body,#root{width:100%;height:100%;margin:0}body{overflow:hidden;user-select:none;-webkit-user-select:none;-webkit-tap-highlight-color:transparent}.app-shell{width:100vw;height:100vh;display:flex;align-items:center;justify-content:center;background:radial-gradient(circle at 20% 10%,#1f2a5a,#0a1024 45%,#060916);color:#eef4ff;position:relative;overflow:hidden}.game-canvas{width:min(100vw,420px);height:min(100vh,820px);border-radius:18px;box-shadow:0 20px 80px #0009,inset 0 0 40px #7dd3fc14;border:1px solid rgba(148,163,184,.25)}.hud{position:absolute;width:min(420px,100vw - 18px);display:flex;align-items:center;justify-content:space-between;padding:10px 14px;pointer-events:none}.hud.top{top:max(8px,env(safe-area-inset-top))}.hud.bottom{bottom:max(8px,env(safe-area-inset-bottom));flex-direction:column;gap:8px;text-align:center}.label{margin:0;opacity:.72;font-size:12px}h2{margin:0;font-size:24px}.sound-btn,.restart{pointer-events:auto;border:1px solid rgba(191,219,254,.45);background:#1e3a8a66;color:#fff;border-radius:12px;padding:8px 12px;cursor:pointer;font-weight:600}.restart{padding:10px 18px;background:linear-gradient(135deg,#38bdf8,#2563eb)}.restart.center{min-width:170px;font-size:16px;padding:12px 20px}.small{opacity:.7;font-size:12px;margin:0}p{margin:0}.gameover-overlay{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:#02061766;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px)}.gameover-card{pointer-events:auto;border:1px solid rgba(191,219,254,.45);background:#0f172ae6;border-radius:14px;padding:18px 20px;text-align:center;box-shadow:0 10px 30px #00000073}.gameover-card h3{margin:0 0 8px}.gameover-card p{margin:0 0 14px;opacity:.9}.top-actions{display:flex;gap:8px;pointer-events:auto}.config-panel{position:absolute;right:8px;top:60px;width:min(330px,calc(100vw - 16px));max-height:68vh;overflow-y:auto;z-index:30;border:1px solid rgba(191,219,254,.35);background:#020617eb;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:12px;padding:10px;display:flex;flex-direction:column;gap:6px}.config-panel h4{margin:4px 0;font-size:14px}.config-panel label{font-size:13px;display:flex;gap:8px;align-items:center}.config-panel .row{display:grid;grid-template-columns:1fr;align-items:center;gap:4px;font-size:11px}.config-panel input[type=range]{width:100%}.tiny{font-size:12px;opacity:.75}.tilt-meter{display:inline-block;width:80px;height:6px;margin-left:8px;border-radius:5px;background:#94a3b84d;overflow:hidden;vertical-align:middle}.tilt-meter>span{display:block;height:100%;background:linear-gradient(90deg,#22d3ee,#3b82f6)}.config-actions{display:flex;gap:8px;justify-content:flex-end;margin-top:6px}.tiny-btn{border:1px solid rgba(191,219,254,.45);background:#1e3a8a59;color:#fff;border-radius:8px;padding:5px 10px;font-size:12px;cursor:pointer}.tiny-btn.primary{background:linear-gradient(135deg,#38bdf8,#2563eb)}