*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background-color:#f5f5f5;color:#333;line-height:1.5}.app{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:20px}.app-header{text-align:center}.app-title{font-size:2.5rem;font-weight:700;margin-bottom:10px;color:#333}.app-subtitle{font-size:1.1rem;color:#666;margin-bottom:20px}.game-grid{display:grid;gap:2px;border:2px solid #333;border-radius:0;background-color:#333;padding:2px;margin:20px 0;max-width:400px;width:100%;aspect-ratio:1}.grid-cell{border:1px solid #666;border-radius:0;background:#fff;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;cursor:pointer;transition:background-color 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#ddd;border-radius:0;background:#f9f9f9;padding:20px}.room-create-section{margin-bottom:20px;padding-bottom:20px;border-bottom:1px solid #ddd}.room-create-section h4{margin:0 0 10px;font-size:1.1rem;color:#333}.room-create-row{display:flex;justify-content:center}.create-room-btn{padding:12px 24px;font-size:1rem;min-width:150px}.room-list-section h4{margin:0 0 10px;font-size:1.1rem;color:#333}.room-list-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.room-list{max-height:200px;overflow-y:auto}.room-loading,.room-empty{text-align:center;padding:20px;color:#666;font-style:italic}.room-item{display:flex;justify-content:space-between;align-items:center;padding:10px;margin-bottom:5px;border:1px solid #ccc;border-radius:0;background:#fff}.room-info .room-name{font-weight:700;margin-bottom:2px}.room-info .room-players{font-size:.9rem;color:#666}.setup-leaderboard{margin-top:40px}.setup-leaderboard .leaderboard{max-height:400px;border:1px solid #ddd;background:#f9f9f9}.setup-leaderboard .leaderboard h3{background:#333;color:#fff;margin:0;padding:15px 20px;font-size:1.2rem}.setup-leaderboard .scores-list{max-height:300px}.nickname-section{margin-bottom:30px}.nickname-row{display:flex;align-items:center;gap:15px}.nickname-label{color:#333;font-size:1.3rem;font-weight:700;min-width:60px;flex-shrink:0}.nickname-input{flex:1;padding:12px 16px;border:2px solid #666;border-radius:0;font-size:1rem;background:#fff;box-sizing:border-box}.nickname-input:focus{outline:none;border-color:#333;background:#f9f9f9}.start-btn:disabled{opacity:.6;cursor:not-allowed;background:#999;border-color:#999}.install-btn{display:block;margin:15px auto 0;padding:12px 24px;border:2px solid #007bff;border-radius:0;background:#007bff;color:#fff;font-size:1rem;font-weight:700;cursor:pointer;transition:all .2s}.install-btn:hover{background:#0056b3;border-color:#0056b3}.game-result{width:100%;max-width:600px;margin:20px 0}.result-header{text-align:center;margin-bottom:30px;padding:20px;border:2px solid #333;border-radius:0;background:#fff}.result-header h2{font-size:2rem;margin-bottom:20px;color:#333}.final-stats{display:flex;justify-content:space-around;gap:20px}.stat-item{display:flex;flex-direction:column;align-items:center}.stat-label{font-size:.9rem;color:#666;margin-bottom:5px}.stat-value{font-size:1.5rem;font-weight:700;color:#333}.leaderboard{width:100%;border:2px solid #333;border-radius:0;background:#fff;padding:20px}.leaderboard h3{text-align:center;margin-bottom:20px;color:#333;font-size:1.5rem}.new-record-notice{text-align:center;background:#d4edda;border:2px solid #28a745;border-radius:0;padding:10px;margin-bottom:20px;color:#155724;font-weight:700}.loading,.no-scores{text-align:center;color:#666;padding:20px}.scores-list{max-height:300px;overflow-y:auto}.score-item{display:flex;align-items:center;padding:12px;border-bottom:1px solid #ddd;transition:background-color .2s}.score-item:hover{background:#f8f9fa}.score-item.current-player{background:#fff3cd;border:2px solid #ffc107;border-radius:0;margin:2px 0}.rank{font-size:1.2rem;font-weight:700;color:#666;min-width:40px}.player-info{flex:1;margin-left:15px}.player-details{display:flex;align-items:center;gap:15px}.nickname{font-weight:700;color:#333;min-width:80px;flex-shrink:0}.score-details{display:flex;gap:15px;font-size:.9rem;color:#666}.score-details .score{color:#007bff;font-weight:700}.result-actions{display:flex;justify-content:center;gap:15px;margin-top:30px}.result-actions .btn{padding:15px 40px;font-size:1.2rem;min-width:150px}@media (max-width: 600px){.setup-container{padding:20px}.setup-header h2{font-size:1.5rem}.mode-buttons-simple{flex-direction:row;gap:10px}.mode-btn-simple{flex:1;min-width:100px;padding:12px 16px;font-size:.9rem}.start-btn{width:100%;max-width:300px}.nickname-row{gap:10px}.nickname-label{font-size:1.1rem;min-width:50px}.nickname-input{font-size:.9rem;padding:10px 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