* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 600px;
    margin: 50px auto;
    padding: 30px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

h1 {
    text-align: center;
    color: #333;
    margin-bottom: 30px;
    font-size: 24px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #555;
}

input[type="text"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: #4CAF50;
    box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2);
}

.btn-submit {
    width: 100%;
    padding: 12px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.btn-submit:hover {
    background-color: #45a049;
}

.btn-submit:active {
    background-color: #3d8b40;
}

.btn-get-card {
    display: block;
    width: 100%;
    padding: 12px;
    background-color: #2196F3;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    text-align: center;
    text-decoration: none;
    margin-top: 10px;
}

.btn-get-card:hover {
    background-color: #1976D2;
}

.btn-get-card:active {
    background-color: #1565C0;
}

.result {
    margin-top: 30px;
    padding: 20px;
    background-color: #f9f9f9;
    border-radius: 4px;
    border: 1px solid #eee;
}

.result h3 {
    margin-bottom: 15px;
    color: #333;
}

.result pre {
    background-color: #f5f5f5;
    padding: 15px;
    border-radius: 4px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 14px;
    line-height: 1.4;
}

.loading {
    text-align: center;
    padding: 20px;
    color: #666;
    font-style: italic;
}

@media (max-width: 768px) {
    .container {
        margin: 20px;
        padding: 20px;
    }
    
    h1 {
        font-size: 20px;
    }
}