body {
            margin: 0;
            padding: 0;
            background: url('../images/flower.jpg') center/cover no-repeat;
            min-height: 100vh;
            display: grid;
            place-items: center;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        }
        
        .glass-container {
            width: 400px;
            height: 300px;
            position: relative;
            border-radius: 20px;
            overflow: hidden;
        }
        
        .glass-effect {
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(255, 255, 255, var(--glass-opacity, 0.15));
            backdrop-filter: blur(var(--glass-blur, 20px));
            -webkit-backdrop-filter: blur(var(--glass-blur, 20px));
            border: 1px solid rgba(255, 255, 255, var(--border-opacity, 0.2));
            border-radius: 20px;
            
            /* Figmaスタイルのボックスシャドウ */
            box-shadow: 
                0 8px 32px 0 rgba(31, 38, 135, var(--shadow-opacity, 0.3)),
                inset 0 1px 0 rgba(255, 255, 255, var(--highlight-opacity, 0.4)),
                inset 0 -1px 0 rgba(255, 255, 255, var(--highlight-opacity, 0.1));
        }
        
        .content {
            position: relative;
            z-index: 10;
            padding: 50px;
            text-align: center;
            color: white;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        
        .content h1 {
            margin: 0 0 20px 0;
            font-size: 2.5rem;
            font-weight: 200;
            text-shadow: 0 2px 20px rgba(0,0,0,0.5);
        }
        
        .content p {
            margin: 0;
            font-size: 1.2rem;
            opacity: 0.9;
            text-shadow: 0 1px 10px rgba(0,0,0,0.5);
        }
        
        .controls {
            position: fixed;
            top: 30px;
            right: 30px;
            background: rgba(0, 0, 0, 0.8);
            padding: 20px;
            border-radius: 12px;
            color: white;
            font-family: system-ui;
            min-width: 200px;
        }
        
        /* スマホ対応 */
        @media (max-width: 768px) {
            body {
                padding: 20px;
                background-attachment: scroll;
            }
            
            .glass-container {
                width: 90vw;
                height: 50vh;
                min-height: 250px;
            }
            
            .content h1 {
                font-size: 2rem;
            }
            
            .content p {
                font-size: 1rem;
            }
            
            .controls {
                position: relative;
                top: unset;
                right: unset;
                background: rgba(0, 0, 0, 0.9);
                border-radius: 16px 16px 0 0;
                padding: 20px;
                min-width: auto;
                max-height: 60vh;
                overflow-y: auto;
            }
        }
        
        @media (max-width: 480px) {
            .glass-container {
                width: 85vw;
                height: 45vh;
                min-height: 200px;
            }
            
            .content {
                padding: 30px;
            }
            
            .content h1 {
                font-size: 1.8rem;
            }
            
            .controls {
                padding: 16px;
            }
            
            .control-item {
                margin-bottom: 12px;
            }
            
            .control-item label {
                min-width: 70px;
                font-size: 13px;
            }
            
            .presets {
                grid-template-columns: 1fr 1fr;
                gap: 6px;
            }
            
            .preset-btn {
                padding: 6px 10px;
                font-size: 10px;
            }
        }
        
        .control-item {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 14px;
        }
        
        .control-item label {
            min-width: 80px;
            font-size: 12px;
        }
        
        .control-item input {
            flex: 1;
        }
        
        .control-item span {
            min-width: 30px;
            text-align: right;
            font-weight: bold;
        }
        
        /* プリセットボタン */
        .presets {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 8px;
            margin-top: 20px;
        }
        
        .preset-btn {
            padding: 8px 12px;
            background: rgba(255, 255, 255, 0.2);
            border: none;
            border-radius: 6px;
            color: white;
            cursor: pointer;
            font-size: 11px;
            transition: background 0.2s;
        }
        
        .preset-btn:hover {
            background: rgba(255, 255, 255, 0.3);
        }
        
        .copy-button {
            background: #0066ff;
            color: white;
            border: none;
            border-radius: 6px;
            padding: 8px 16px;
            font-size: 12px;
            cursor: pointer;
            font-weight: 500;
            transition: background 0.2s;
            width: 100%;
            margin-top: 15px;
        }
        
        .copy-button:hover {
            background: #0052cc;
        }
        
        .copy-button:active {
            background: #004299;
        }
        
        .copy-button.copied {
            background: #00b341;
        }