body{margin:0;min-height:100vh;display:grid;place-items:center;background:linear-gradient(#7ec8ff,#dff6ff);font-family:Arial,sans-serif}@media (max-width:768px){body{min-height:100vh;display:block;padding:0}.game-shell{width:100vw;min-height:100vh;padding:0!important;justify-content:center}.game-shell .header,.header{display:none!important}.canvas-wrap{width:100vw!important;height:100vh!important;border:none!important;border-radius:0!important;box-shadow:none!important;margin:0!important}.score-result{right:6px!important;bottom:6px!important;min-width:84px!important;padding:5px 6px!important;border-radius:7px!important}.score-result-title{font-size:.45rem;margin-bottom:2px}#registered-score{font-size:.6rem;margin-bottom:3px}.ranking-list{font-size:.52rem;gap:0}.ranking-item{gap:3px;padding-top:0}}.fixed-top-links{position:fixed;top:12px;left:12px;z-index:100;display:flex;gap:10px;padding:8px 10px;border-radius:12px;background:rgba(255,255,255,.5);box-shadow:0 4px 12px rgba(0,0,0,.08)}.fixed-top-links a{color:#123;text-decoration:none}.game-shell{display:flex;flex-direction:column;align-items:center;gap:16px;padding:20px}.header{display:flex;align-items:center;justify-content:space-between;width:min(560px,90vw)}h1{margin:0;font-size:2rem;color:#123}.score-box{position:absolute;top:14px;right:14px;z-index:2;padding:8px 12px;border-radius:12px;background:rgba(255,255,255,.5);color:#123;font-weight:700;display:flex;gap:8px;align-items:center}.score-result{position:fixed;right:16px;bottom:16px;z-index:30;min-width:160px;padding:12px 14px;border-radius:12px;background:rgba(18,22,31,.78);color:#fff;box-shadow:0 8px 20px rgba(0,0,0,.18);backdrop-filter:blur(4px)}.score-result-title{font-size:.75rem;opacity:.8;margin-bottom:6px}#registered-score{font-size:.95rem;font-weight:700;margin-bottom:8px}.ranking-list{display:flex;flex-direction:column;gap:4px;font-size:.8rem}.ranking-item{display:flex;justify-content:space-between;gap:10px;padding-top:2px;border-top:1px solid rgba(255,255,255,.15)}.ranking-empty{opacity:.75}.canvas-wrap{position:relative;width:min(560px,92vw);height:640px;border:4px solid rgba(15,23,42,.8);border-radius:18px;overflow:hidden;background:linear-gradient(#7ec8ff 0,#dff6ff 100%);box-shadow:0 20px 40px rgba(0,0,0,.15)}#game-canvas{display:block;width:100%;height:100%}.overlay{position:absolute;inset:0;display:none;flex-direction:column;align-items:center;justify-content:center;gap:12px;background:rgba(10,18,29,.35);color:#fff;text-align:center}.overlay.visible{display:flex}#start-button,.link-btn{border:none;border-radius:12px;background:#ffca28;color:#123;font-weight:700;padding:10px 18px;text-decoration:none;cursor:pointer}