* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            background: #f0f0f0;
            min-height: 100vh;
            padding: 40px 20px;
        }
        .container {
            max-width: 900px;
            margin: 0 auto;
            background: white;
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
        }
        h1 {
            text-align: center;
            color: #333;
            margin-bottom: 30px;
            font-size: 2em;
        }
        .preview {
            width: 100%;
            height: 300px;
            border-radius: 12px;
            margin-bottom: 30px;
            border: 3px solid #e0e0e0;
            transition: all 0.3s;
        }
        .controls {
            display: grid;
            gap: 20px;
        }
        .input-group {
            margin-bottom: 15px;
        }
        label {
            display: block;
            margin-bottom: 8px;
            color: #555;
            font-weight: 600;
            font-size: 14px;
        }
        select, input[type="number"], input[type="range"] {
            width: 100%;
            padding: 10px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
        }
        input[type="color"] {
            width: 100%;
            height: 50px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            cursor: pointer;
        }
        .color-stops {
            background: #f9f9f9;
            padding: 20px;
            border-radius: 12px;
            margin: 20px 0;
        }
        .color-stop {
            display: grid;
            grid-template-columns: 1fr 80px 60px;
            gap: 10px;
            margin-bottom: 10px;
            align-items: center;
        }
        .remove-btn {
            padding: 8px;
            background: #e74c3c;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-weight: 600;
        }
        .add-btn {
            width: 100%;
            padding: 12px;
            background: #2ecc71;
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            font-weight: 600;
            margin-top: 10px;
        }
        .code-output {
            background: #2d2d2d;
            color: #f8f8f2;
            padding: 20px;
            border-radius: 12px;
            font-family: 'Courier New', monospace;
            font-size: 13px;
            margin: 20px 0;
            overflow-x: auto;
            cursor: pointer;
            position: relative;
        }
        .code-output:hover {
            background: #363636;
        }
        button {
            width: 100%;
            padding: 14px;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s;
            margin-bottom: 10px;
        }
        button:hover {
            transform: translateY(-2px);
        }
        button.secondary {
            background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%);
        }