body {
            font-family: Arial, sans-serif;
            max-width: 800px;
            margin: 2rem auto;
            padding: 20px;
            background-color: #f5f5f5;
        }
        .container {
            background: white;
            padding: 2rem;
            border-radius: 8px;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        }
        .form-step {
            display: none;
        }
        .form-step.active {
            display: block;
        }
        .form-group {
            margin-bottom: 1rem;
        }
        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: bold;
        }
        input[type="email"],
        input[type="file"],
        textarea {
            width: 100%;
            padding: 0.5rem;
            margin-bottom: 1rem;
            border: 1px solid #ddd;
            border-radius: 4px;
        }
        textarea {
            min-height: 100px;
            resize: vertical;
        }
        button {
            background: #007bff;
            color: white;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: 4px;
            cursor: pointer;
            font-size: 1rem;
        }
        button:disabled {
            background: #ccc;
        }
        #response {
            margin-top: 2rem;
            padding: 1rem;
            background: #f8f9fa;
            border-radius: 4px;
            white-space: pre-wrap;
            display: none;
        }
        .loading {
            display: none;
            text-align: center;
            margin: 1rem 0;
        }