:root{color-scheme:dark;--bg: #0b1020;--left: #7cff8a;--right: #ffd166;--text: #cfd8ff;--muted: #8a97c2}*{margin:0;padding:0;box-sizing:border-box}html,body,#root{width:100%;height:100%;overflow:hidden;background:var(--bg);font-family:system-ui,sans-serif;color:var(--text)}.game-canvas{width:100vw;height:100vh;display:block}.screen{position:fixed;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center}.screen.menu{background:radial-gradient(circle at 50% 35%,#16203f,var(--bg) 70%)}.screen.overlay{background:#080c1cb8;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.menu-card{display:flex;flex-direction:column;align-items:center;gap:14px;padding:40px 48px;border-radius:18px;background:#141c38d9;box-shadow:0 18px 60px #00000080;max-width:420px;text-align:center}.title{font-size:40px;font-weight:800;letter-spacing:1px}.subtitle{font-size:16px;color:var(--muted);margin-bottom:8px}.hint{font-size:13px;color:var(--muted);margin-top:8px;line-height:1.5}.hint b{color:var(--text)}.btn{width:100%;padding:13px 20px;font-size:17px;font-weight:700;border:1px solid rgba(124,255,138,.25);border-radius:12px;background:#7cff8a14;color:var(--text);cursor:pointer;transition:transform .08s ease,background .15s ease,border-color .15s ease}.btn:hover{background:#7cff8a29;border-color:#7cff8a80}.btn:active{transform:scale(.98)}.btn-primary{background:var(--left);color:#06210d;border-color:var(--left)}.btn-primary:hover{background:#9bffa8}.btn:disabled{opacity:.4;cursor:not-allowed}.btn:disabled:hover{background:#7cff8a14;border-color:#7cff8a40}.row{display:flex;gap:10px;width:100%}.divider{color:var(--muted);font-size:13px;margin:2px 0}.code-box{font-size:40px;font-weight:800;letter-spacing:8px;padding:10px 18px;border-radius:12px;background:#7cff8a1a;border:1px solid rgba(124,255,138,.35);color:var(--left)}.code-input{width:100%;padding:13px 20px;font-size:26px;font-weight:800;letter-spacing:8px;text-align:center;text-transform:uppercase;border:1px solid rgba(207,216,255,.25);border-radius:12px;background:#080c1c99;color:var(--text)}.code-input:focus{outline:none;border-color:var(--left)}.error-text{color:#ff8a8a}.hud{position:fixed;top:0;left:0;right:0;display:flex;justify-content:center;gap:12px;padding:14px;pointer-events:none;-webkit-user-select:none;user-select:none}.score{font-size:34px;font-weight:800;letter-spacing:2px;text-shadow:0 2px 8px rgba(0,0,0,.6)}.score.left{color:var(--left)}.score.right{color:var(--right)}.score.sep{color:var(--text)}.status{position:fixed;top:64px;left:0;right:0;text-align:center;color:var(--text);font-size:18px;pointer-events:none;-webkit-user-select:none;user-select:none;text-shadow:0 2px 8px rgba(0,0,0,.6)}.help{position:fixed;bottom:12px;left:0;right:0;text-align:center;color:var(--muted);font-size:13px;pointer-events:none;-webkit-user-select:none;user-select:none}.help b{color:var(--text)}.exit-btn{position:fixed;top:12px;left:12px;padding:8px 14px;font-size:14px;font-weight:600;border:1px solid rgba(207,216,255,.2);border-radius:10px;background:#141c38b3;color:var(--text);cursor:pointer;z-index:10}.exit-btn:hover{background:#28345cd9}.spinner{width:34px;height:34px;border:4px solid rgba(124,255,138,.2);border-top-color:var(--left);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}