body{font-family:Arial,sans-serif;background-color:#f0f0f0;margin:0;padding:0}.container{width:100%;max-width:600px;margin:0 auto;padding:20px;background-color:#fff;border-radius:8px;box-shadow:0 4px 6px #0000001a;text-align:center}.matchmaking-container{font-size:18px;margin-bottom:20px;animation:blink 1s infinite}@keyframes blink{0%,to{opacity:1}50%{opacity:.5}}.janken-container{display:flex;justify-content:center;gap:10px;margin-bottom:20px}.janken-container button{padding:10px 20px;font-size:16px;cursor:pointer}.result-container{margin-top:20px}