body {
    font-size: 12px;
    background-color: whitesmoke;
    color: rgb(0, 0, 0);
    text-align: center;
    font-family: 'Courier New', Courier, monospace;
}

h1 {
    font-family: 'Arial', sans-serif;
    font-size: 35px;
}

.logo {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    margin-top: 20px;
}

button {
    display: inline-block;
    width: 90%;
    height: 50px;
    border-radius: 30px;
    background-color: black;
    color: white;
    font-size: 20px;
    font-family:'Arial', sans-serif;
    border: none;
    box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    margin: 10px;
}

button:hover {
    background-color: rgb(31, 31, 31);

}
button:active {
    background-color: rgb(64, 64, 64);
}

iframe {
    display:block;
    margin: 20px auto;
    width: 90%;
    border-radius: 30px;
}

nav {
    position: sticky;
    top: 15px;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    padding: 10px 0;
    margin: 20px auto;
    color: rgb(0, 0, 0);
    background-color: rgb(230, 230, 230);
    opacity: 0.8;
    font-family: 'Arial', sans-serif;
    border-radius: 30px;
    font-size: 14px;
    width : 60%;
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
}
.menu {
    color: rgb(0, 0, 0);
    text-decoration: none;;
}