:root{--bg-top: #d8f2ff;--bg-bottom: #8ecff0;--card: #f9fdff;--ink: #10212f;--accent: #0c6b8d;--danger: #bd2432;--warn: #d7ab1f;--shadow: 0 12px 30px rgba(6, 47, 64, .14)}*{box-sizing:border-box}body{margin:0;font-family:Trebuchet MS,Segoe UI,sans-serif;color:var(--ink);background:linear-gradient(180deg,var(--bg-top),var(--bg-bottom));min-height:100vh}.page{width:min(100%,900px);margin:0 auto;padding:14px 12px 28px}.hero h1{margin:0;font-size:clamp(1.8rem,6vw,2.4rem)}.subtitle{margin:10px 0 0;line-height:1.4}.game-card{margin-top:14px;background:var(--card);border-radius:16px;box-shadow:var(--shadow);padding:12px}.hud{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:4px 10px;margin-bottom:10px;font-weight:600}.hud p{margin:0}#questionValue{color:var(--accent)}.canvas-wrap{position:relative;width:100%;aspect-ratio:9 / 16;border-radius:14px;overflow:hidden;border:2px solid #7fbad6;background:#74c0e6}#gameCanvas{display:block;width:100%;height:100%;touch-action:none}.overlay{position:absolute;inset:0;display:grid;place-items:center;background:#03202f80;padding:18px}.overlay.hidden{display:none}.overlay-card{background:#fff;border-radius:14px;padding:14px 12px;width:min(100%,360px);box-shadow:var(--shadow);text-align:center}.overlay-card h2{margin:0}.overlay-card p{margin:10px 0 0;line-height:1.4}.action-btn{border:0;margin-top:12px;padding:10px 14px;border-radius:10px;background:var(--accent);color:#fff;font-weight:700;font-size:1rem}.controls{margin-top:12px;display:grid;grid-template-columns:repeat(3,1fr);grid-template-areas:". up ." "left . right" ". down .";gap:8px}.dir-btn{border:0;border-radius:12px;padding:12px 8px;color:#fff;font-size:.98rem;font-weight:700;background:#1e7fa6;box-shadow:0 6px 14px #10455e33}.dir-btn:active{transform:translateY(1px)}.dir-btn.up{grid-area:up}.dir-btn.left{grid-area:left}.dir-btn.right{grid-area:right}.dir-btn.down{grid-area:down}.instructions,.seo-copy{margin-top:16px;background:#ffffffa6;border-radius:14px;padding:12px}.instructions h2,.seo-copy h2{margin-top:0}.instructions ol{margin:8px 0;padding-left:18px}.instructions li{margin:6px 0;line-height:1.35}.hint{margin:8px 0 0}kbd{border:1px solid #88b3c8;border-radius:5px;padding:0 6px;background:#eef9ff}@media(min-width:760px){.page{padding:20px}.game-card{padding:14px}.canvas-wrap{max-width:470px;margin-inline:auto}.controls{max-width:470px;margin:12px auto 0}}