*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
}
body {
    font-family: Arial;
    background-color: #f2f2f2;
    text-align: center;
}

header {
    background-color: lightgreen;
    padding: 20px;
}

input, button {
    padding: 10px;
    margin: 5px;
}

button {
    background-color: lightgreen;
    border: none;
    cursor: pointer;
}

.theList {
    list-style: none;
    padding: 0;
}

.theList li {
    background-color: white;
    padding: 10px;
    margin: 5px;
}

#menuList {
    list-style: none;
    padding: 0;
}

#menuList[hidden] {
    display: none;
}