.outer {
    margin-left: 20%;
    margin-right: 20%;
    margin-top: 10vh;
    background-color: white;
    padding: 2em;
}

.main {
    height: 50vh;
    overflow-y: scroll;
    overflow-x: hidden;
    font-family: sans-serif;
    font-size: 1.2em;
}

.button {
    margin-top: 0.5em;
    background-color: #4CAF50;
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    font-size: 2em;
    width: 100%;
    cursor: pointer;
}

body {
    background-image: url("background.jpg");
    background-repeat: no-repeat;
    background-size: cover;
    width: 100%;
    height: 100%;
}