*{box-sizing:border-box}html,body{margin:0;padding:env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);background:#05070a;color:#e8f0ee;font-family:system-ui,sans-serif;height:100%;overflow:hidden}#app{width:100%;height:100%}.game-shell{position:relative;width:100%;height:100%;display:flex;flex-direction:column}.level-select-overlay{position:absolute;inset:0;z-index:30;background:#05070a;padding:28px 16px 16px;overflow-y:auto}.level-select-overlay[hidden]{display:none!important}.level-select-title{margin:0 0 20px;font-size:1.25rem;font-weight:600}.level-select-list{display:flex;flex-direction:column;gap:12px}.level-select-btn{min-height:48px;padding:12px 16px;border-radius:10px;border:1px solid #3a4a46;background:#0c1218;color:#e8f0ee;font-size:1rem;text-align:left;cursor:pointer}.level-select-btn:disabled{opacity:.45;cursor:not-allowed}.level-select-back{margin-top:8px;color:#8a9a96}.board-host{flex:1;min-height:0;touch-action:none}.board-host canvas{display:block;width:100%;height:100%}.screen-overlay{position:absolute;inset:0;z-index:40;background:#05070a;padding:28px 16px 16px;overflow-y:auto}.screen-overlay[hidden]{display:none!important}.title-stack{max-width:360px;margin:12vh auto 0;text-align:center}.prototype-tag{display:inline-block;margin:0 0 8px;padding:4px 10px;border-radius:999px;border:1px solid #3a4a46;font-size:.75rem;letter-spacing:.06em;text-transform:uppercase;color:#8a9a96}.game-title{margin:0;font-size:2.75rem;font-weight:700}.title-sub{margin:8px 0 24px;color:#8a9a96;font-size:.95rem}.title-actions{display:flex;flex-direction:column;gap:12px}.loading-screen{display:flex;align-items:center;justify-content:center;z-index:50}.loading-text{font-size:1.1rem;color:#8a9a96}.panel-card{max-width:360px;margin:8vh auto 0;display:flex;flex-direction:column;gap:12px}.panel-card h2{margin:0 0 8px}.setting-row{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:44px}.how-list{margin:0 0 12px;padding-left:1.1rem;color:#c8d4d0}.error-screen h1{margin-top:10vh}.error-hint{color:#8a9a96}