* {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: Arial, sans-serif;
    }

    body {
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        background: linear-gradient(135deg, #a0bfdd, #364e50);
    }

    .upload-card {
        background: #fff;
        padding: 30px 40px;
        border-radius: 12px;
        box-shadow: 0 10px 25px rgba(0,0,0,0.2);
        text-align: center;
        width: 320px;
    }

    .upload-card h2 {
        margin-bottom: 20px;
        color: #333;
    }

    .file-input {
        margin-bottom: 20px;
    }

    .file-input input[type="file"] {
        width: 100%;
        padding: 10px;
        border: 2px dashed #4facfe;
        border-radius: 8px;
        background: #f9f9f9;
        cursor: pointer;
    }

    .upload-btn {
        width: 100%;
        padding: 12px;
        border: none;
        border-radius: 8px;
        background: #4facfe;
        color: white;
        font-size: 16px;
        font-weight: bold;
        cursor: pointer;
        transition: 0.3s;
    }

    .upload-btn:hover {
        background: #007bff;
        transform: scale(1.03);
    }