body {
    margin: 0;
    font-family: Arial;
    background-color: #1c1c1c;
    color: white;
}

/* Menü */
.menu {
    background-color: black;
    padding: 15px;
    text-align: center;
}

.menu a {
    color: white;
    text-decoration: none;
    margin: 0 20px;
    font-size: 18px;
}

.menu a:hover {
    color: orange;
}

/* iframe */
.iframe-alan {
    width: 100%;
    height: 500px;
    border: none;
    background-color: white;
}