body {
    background-color: #e0f7fa;
    font-family: 'Helvetica Neue', sans-serif;
    color: #004d40;
    margin: 0;
    padding: 0;
}

header {
    background-color: #00796b;
    padding: 20px;
    text-align: center;
    color: #ffffff;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    margin: 0 15px;
}

footer {
    background-color: #004d40;
    color: #ffffff;
    text-align: center;
    padding: 10px;
    position: absolute;
    bottom: 0;
    width: 100%;
}

button {
    background-color: #004d40;
    color: #ffffff;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: #00796b;
}

.froge {
    width: 100px;
    height: 100px;
}