.auth-card{max-width:430px;margin:7vh auto;padding:32px;background:#fff;border:1px solid #ced8d6;border-radius:24px;box-shadow:0 20px 60px #163b4430;color:#183b46}.auth-card h2{margin:8px 0 12px}.auth-card form{display:grid;gap:14px}.auth-card label{display:grid;gap:5px;font-weight:600}.auth-card input{width:100%;box-sizing:border-box;padding:12px;border:1px solid #adc3c6;border-radius:10px;font:inherit}.auth-card button,.multiplayer-panel button{cursor:pointer}.auth-links{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.auth-links button{border:0;background:none;text-decoration:underline;color:#225e72}.multiplayer-panel{margin:16px 0;padding:16px;background:#edf4f4;border:1px solid #c5d9db;border-radius:15px}.multiplayer-panel h3{margin:0 0 8px}.multiplayer-panel .player-row{display:flex;justify-content:space-between;gap:8px;margin:6px 0}.multiplayer-ship{position:absolute;z-index:5;transform:translate(-50%,-50%);background:#1f5966;color:white;border:1px solid #9bd0d2;border-radius:12px;padding:3px 7px;font-size:12px;white-space:nowrap;box-shadow:0 2px 8px #0026}.multiplayer-ship:hover{background:#106f83}.multiplayer-chat{display:flex;flex-direction:column;gap:8px;max-height:48vh;overflow:auto}.multiplayer-chat p{margin:3px 0}.multiplayer-chat form{display:flex;gap:5px}.multiplayer-chat input{flex:1;min-width:0}.multiplayer-battle{border-color:#bb6d63;background:#fff0ea}