body {
    background-color: #e0f7fa;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #00796b;
}

header {
    background-color: #004d40;
    color: #ffffff;
    padding: 20px;
    text-align: center;
    font-size: 2em;
}

nav a {
    color: #004d40;
    text-decoration: none;
    padding: 10px;
    font-weight: bold;
}

nav a:hover {
    background-color: #b2dfdb;
}

button {
    background-color: #009688;
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    font-size: 16px;
    margin: 4px 2px;
    cursor: pointer;
    transition-duration: 0.4s;
}

button:hover {
    background-color: white;
    color: black;
    border: 2px solid #009688;
}

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

.froge-icon {
    width: 100px;
    height: auto;
    margin: 20px 0;
}