body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
}

header {
    background-color: #2C3E50;
    color: white;
    padding: 20px;
    text-align: center;
}

header img {
    width: 150px;
}

h1 {
    margin: 10px 0;
}

main {
    padding: 20px;
}

section {
    margin-bottom: 30px;
}

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

footer {
    background-color: #2C3E50;
    color: white;
    text-align: center;
    padding: 10px;
}

button {
    background-color: #3498DB;
    color: white;
    padding: 10px 15px;
    border: none;
    cursor: pointer;
}

button:hover {
    background-color: #2980B9;
}

.hidden {
    display: none;
}