:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color:#213547;background-color:#2c2c2c}*{margin:0;padding:0;box-sizing:border-box}body{min-height:100vh;display:flex;justify-content:center;align-items:center}#app{display:flex;flex-direction:column;align-items:center}.game-container{display:flex;flex-direction:column;background-color:#3a3a3a;border-radius:8px;padding:16px;gap:12px;box-shadow:0 8px 24px #0000004d}.game-header{text-align:center}h1{font-size:1.5rem;color:khaki;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.game-main{display:flex;gap:16px}.game-sidebar{display:flex;flex-direction:column;gap:16px;width:140px;padding:12px;background-color:#4a4a4a;border-radius:6px}.gauge-container{display:flex;flex-direction:column;gap:12px}.gauge{display:flex;flex-direction:column;gap:4px}.gauge-label{font-size:.85rem;font-weight:700;color:#ddd}.gauge-bar{height:20px;background-color:#2a2a2a;border-radius:10px;overflow:hidden;border:1px solid #555}.gauge-fill{height:100%;width:0%;transition:width .3s ease;border-radius:10px}.gauge-fullness{background:linear-gradient(90deg,#ff6b6b,#ff8e53)}.gauge-soba{background:linear-gradient(90deg,#4ecdc4,#45b7aa)}.gauge-value{font-size:.75rem;color:#aaa;text-align:right}.timer-container{display:flex;flex-direction:column;align-items:center;padding:8px;background-color:#333;border-radius:6px}.timer-label{font-size:.75rem;color:#aaa}.timer-value{font-size:1.5rem;font-weight:700;color:#fff;font-family:monospace}.next-container{display:flex;flex-direction:column;align-items:center;padding:8px;background-color:#333;border-radius:6px}.next-label{font-size:.75rem;color:khaki;font-weight:700}.next-preview{font-size:.9rem;color:#fff;margin-top:4px}.seat-container{display:flex;flex-direction:column;align-items:center;padding:8px;background-color:#333;border-radius:6px}.seat-label{font-size:.75rem;color:#87ceeb;font-weight:700}.seat-indicator{font-size:.9rem;color:#fff;margin-top:4px}.canvas-container{display:flex;justify-content:center;align-items:center}#game-canvas{border:3px solid #555;border-radius:4px;box-shadow:0 4px 12px #0000004d}.game-footer{display:flex;justify-content:center;padding:8px}.stage-info{font-size:.9rem;color:#aaa;font-weight:700}.hidden{display:none!important}.title-screen{display:flex;justify-content:center;align-items:center;min-width:800px;min-height:600px}.title-container{display:flex;flex-direction:column;align-items:center;gap:32px;padding:48px;background-color:#3a3a3a;border-radius:16px;box-shadow:0 8px 32px #0006}.title-logo{font-size:2.5rem;color:khaki;text-shadow:3px 3px 6px rgba(0,0,0,.4)}.title-description{font-size:1rem;color:#ccc;text-align:center}.start-button{padding:16px 48px;font-size:1.25rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#4ecdc4,#45b7aa);border:none;border-radius:8px;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 12px #4ecdc44d}.start-button:hover{transform:translateY(-2px);box-shadow:0 6px 16px #4ecdc466}.start-button:active{transform:translateY(0)}.sound-button{padding:10px 24px;font-size:.9rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#6c757d,#5a6268);border:none;border-radius:8px;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 12px #6c757d4d}.sound-button:hover{transform:translateY(-2px);box-shadow:0 6px 16px #6c757d66}.sound-button:active{transform:translateY(0)}.stage-select-screen{display:flex;justify-content:center;align-items:center;min-width:800px;min-height:600px}.stage-select-container{display:flex;flex-direction:column;align-items:center;gap:32px;padding:48px;background-color:#3a3a3a;border-radius:16px;box-shadow:0 8px 32px #0006}.stage-select-title{font-size:1.75rem;color:khaki;text-shadow:2px 2px 4px rgba(0,0,0,.3)}.stage-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.stage-button{width:64px;height:64px;font-size:1.5rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:12px;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 12px #667eea4d}.stage-button:hover:not(.locked){transform:translateY(-3px);box-shadow:0 6px 16px #667eea66}.stage-button:active:not(.locked){transform:translateY(0)}.stage-button.locked{background:linear-gradient(135deg,#555,#444);color:#888;cursor:not-allowed;box-shadow:none}.stage-button.locked:after{content:"🔒";display:block;font-size:.75rem;margin-top:-4px}.stage-button.cleared{background:linear-gradient(135deg,#4ecdc4,#45b7aa);box-shadow:0 4px 12px #4ecdc44d}.stage-button.cleared:after{content:"⭐";display:block;font-size:.75rem;margin-top:-4px}.back-button{padding:12px 32px;font-size:1rem;font-weight:700;color:#ccc;background-color:#555;border:none;border-radius:8px;cursor:pointer;transition:background-color .2s}.back-button:hover{background-color:#666}.how-to-play-screen{display:flex;justify-content:center;align-items:center;min-width:800px;min-height:600px;padding:20px}.how-to-play-container{display:flex;flex-direction:column;align-items:center;gap:24px;padding:32px;max-width:700px;max-height:80vh;background-color:#3a3a3a;border-radius:16px;box-shadow:0 8px 32px #0006;overflow-y:auto}.how-to-play-title{font-size:1.75rem;color:khaki;text-shadow:2px 2px 4px rgba(0,0,0,.3);margin:0}.how-to-play-content{display:flex;flex-direction:column;gap:24px;width:100%}.section-title{font-size:1.2rem;color:#87ceeb;margin:0 0 12px;border-bottom:2px solid #555;padding-bottom:8px}.control-items{display:flex;flex-direction:column;gap:12px}.control-item{display:flex;align-items:center;gap:16px;padding:12px;background-color:#4a4a4a;border-radius:8px}.control-key{font-size:1.1rem;font-weight:700;color:khaki;background-color:#2a2a2a;padding:8px 16px;border-radius:6px;border:2px solid #555;min-width:120px;text-align:center}.control-desc{font-size:.95rem;color:#ddd}.gameplay-steps{display:flex;flex-direction:column;gap:16px}.gameplay-step{display:flex;gap:16px;padding:16px;background-color:#4a4a4a;border-radius:8px}.step-number{flex-shrink:0;width:36px;height:36px;display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:50%}.step-content{display:flex;flex-direction:column;gap:4px}.step-title{font-size:1rem;font-weight:700;color:khaki}.step-desc{font-size:.9rem;color:#ccc;line-height:1.5}.tips-list{margin:0;padding-left:24px;color:#ccc;line-height:1.8}.tips-list li{font-size:.9rem;margin-bottom:8px}.soba-text{color:#4ecdc4}.fullness-text{color:#ff8e53}.how-to-play-button{padding:12px 36px;font-size:1rem;font-weight:700;color:#fff;background:linear-gradient(135deg,#667eea,#764ba2);border:none;border-radius:8px;cursor:pointer;transition:transform .2s,box-shadow .2s;box-shadow:0 4px 12px #667eea4d}.how-to-play-button:hover{transform:translateY(-2px);box-shadow:0 6px 16px #667eea66}.how-to-play-button:active{transform:translateY(0)}