body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f9;
    color: #333;
    margin: 0;
    padding: 0;
    text-align: center;
}

header {
    background-color: #2c3e50;
    color: white;
    padding: 10px 0;
}

.container {
    margin: 50px auto;
    max-width: 800px;
    padding: 20px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.btn {
    display: inline-block;
    margin: 10px;
    padding: 15px 25px;
    font-size: 16px;
    color: white;
    background-color: #567d97;
    text-decoration: none;
    border-radius: 3px;
    transition: background 0.3s;
}

.btn:hover {
    background-color: #2d4a5e;
}

.content-area {
    min-height: 200px;
    border: 2px dashed #bdc3c7;
    padding: 20px;
    margin-bottom: 20px;
    text-align: left;
    background-color: #fafafa;
}