* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    background-color: #1a1a1a;
    font-family: 'Arial', sans-serif;
    margin: 0;
    padding: 0;
}

#canvas {
    --canvas-aspect-ratio: 1.8;
    --canvas-height: min(500px, calc(100vh - 240px), calc(90vw / var(--canvas-aspect-ratio)));
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #000;
    border: 2px solid #333;
    width: calc(var(--canvas-height) * var(--canvas-aspect-ratio));
    height: var(--canvas-height);
    aspect-ratio: 900 / 500;
    cursor: grab;
}

#canvas:active {
    cursor: grabbing;
}

/* 説明バナー */
.instruction-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 60px;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    padding: 12px 20px;
    z-index: 500;
    border-bottom: 2px solid #4a90e2;
    animation: slideDown 0.4s ease;
}

.instruction-text {
    color: #fff;
    font-size: 14px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}

.separator {
    color: #666;
    margin: 0 5px;
}

/* 情報パネル */
.info-panel {
    position: fixed;
    top: 100px;
    right: 20px;
    background: rgba(0, 0, 0, 0.8);
    border: 2px solid #4a90e2;
    border-radius: 10px;
    padding: 15px;
    color: #fff;
    min-width: 200px;
    z-index: 100;
}

.info-section {
    margin-bottom: 15px;
}

.info-section:last-child {
    margin-bottom: 0;
}

.info-label {
    font-size: 12px;
    color: #aaa;
    margin-bottom: 5px;
}

.info-value {
    font-size: 24px;
    font-weight: bold;
    color: #4ecdc4;
}

/* コントローラー */
.controls {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    padding: 15px 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    border-top: 2px solid #4a90e2;
    z-index: 500;
}

button {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);
}

button:active {
    transform: translateY(0);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 15px;
    border-radius: 8px;
}

.control-group label {
    color: #fff;
    font-size: 14px;
    white-space: nowrap;
}

.control-group input[type="range"] {
    width: 150px;
    cursor: pointer;
}

.value-display {
    color: #4ecdc4;
    font-weight: bold;
    min-width: 60px;
}

/* 色選択コントロール */
.color-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    background: rgba(255, 255, 255, 0.1);
    padding: 8px 15px;
    border-radius: 8px;
    flex-wrap: wrap;
}

.color-label {
    color: #fff;
    font-size: 14px;
    font-weight: bold;
}

.color-switches {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.color-switch {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    padding: 5px 10px;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.color-switch:hover {
    background: rgba(255, 255, 255, 0.1);
}

.color-switch input[type="checkbox"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.color-name {
    color: #fff;
    font-size: 13px;
    user-select: none;
}

/* 各色のスタイル */
.red-switch .color-name { color: #ff0000; }
.orange-switch .color-name { color: #ff8800; }
.yellow-switch .color-name { color: #ffff00; }
.green-switch .color-name { color: #00ff00; }
.cyan-switch .color-name { color: #00ffff; }
.blue-switch .color-name { color: #0000ff; }
.violet-switch .color-name { color: #8800ff; }

/* レスポンシブ対応 */
@media (max-width: 768px) {
    .controls {
        padding: 10px;
        gap: 10px;
    }
    
    .control-group {
        padding: 5px 10px;
    }
    
    .control-group input[type="range"] {
        width: 100px;
    }
    
    .info-panel {
        right: 10px;
        top: 90px;
        min-width: 150px;
        padding: 10px;
    }
    
    .info-value {
        font-size: 18px;
    }
    
    button {
        padding: 8px 15px;
        font-size: 12px;
    }
}