body {
        font-family: Arial, sans-serif;
        background: #eef2f3;
        display: flex;
        justify-content: center;
        align-items: center;
        height: 100vh;
    }

    .app {
        background: #fff;
        padding: 20px 25px;
        border-radius: 12px;
        width: 340px;
        box-shadow: 0 6px 15px rgba(0,0,0,0.15);
    }

    h2 {
        text-align: center;
        margin-bottom: 15px;
    }

    input[type="color"], input[type="range"] {
        width: 100%;
        margin: 8px 0;
        cursor: pointer;
    }

    .preview {
        height: 90px;
        border-radius: 8px;
        margin: 10px 0;
        border: 1px solid #ccc;
    }

    .row {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-top: 6px;
    }

    .row span {
        font-size: 14px;
    }

    button {
        padding: 4px 10px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        background: #007bff;
        color: #fff;
        font-size: 12px;
    }

    button:hover {
        opacity: 0.85;
    }

    .gradient-box {
        height: 80px;
        border-radius: 8px;
        margin-top: 10px;
        border: 1px solid #ccc;
    }

    .css-code {
        font-size: 12px;
        background: #f4f4f4;
        padding: 6px;
        border-radius: 5px;
        margin-top: 6px;
        word-break: break-all;
    }