body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.8;
    margin: 0;
    padding: 20px;
    background-color: #f5f5f5;
    color: #333;
    text-align: center;
}
header {
    background: linear-gradient(135deg, #f39c12, #e74c3c);
    color: white;
    padding: 40px 20px;
    border-radius: 0 0 20px 20px;
}
h1 { font-size: 2.5em; margin-bottom: 10px; }
h2 { color: #2c3e50; margin-top: 40px; }
ul {
    list-style: none;
    padding: 0;
    max-width: 600px;
    margin: 30px auto;
}
li {
    background: white;
    margin: 10px auto;
    padding: 15px;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.1);
    width: 80%;
}
.button {
    display: inline-block;
    background-color: #27ae60;
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 8px;
    font-weight: bold;
    margin: 20px;
    transition: background 0.3s;
}
.button:hover { background-color: #229954; }
footer {
    margin-top: 50px;
    padding: 20px;
    color: #7f8c8d;
    border-top: 1px solid #ddd;
}