body {
    font-family: Arial, sans-serif;
    background: #f8f9fa;
    margin: 0;
    padding: 0;
    text-align: center;
}

.center-box, .dashboard {
    margin: 100px auto;
    padding: 30px;
    max-width: 500px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

h1, h2 {
    color: #2c3e50;
}

.btn {
    display: inline-block;
    margin-top: 20px;
    padding: 10px 20px;
    background: #27ae60;
    color: white;
    text-decoration: none;
    border-radius: 8px;
}

ul, ol {
    text-align: left;
    margin-left: 30px;
    color: #333;
}