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

.container {
    max-width: 800px;
    margin: auto;
    padding: 20px;
    background-color: #fff;
}

h1 {
    text-align: center;
    color: #333;
}

p {
    text-align: center;
    color: #666;
}

hr {
    margin: 20px 0;
}

.activity {
    margin-bottom: 30px;
    padding: 15px;
    background-color: #eef;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.activity h2 {
    color: #2c3e50;
}

ul {
    list-style-type: disc;
    padding-left: 20px;
}

.button {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 20px;
    background-color: #3498db;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.button:hover {
    background-color: #2980b9;
}