styles.css

html,
body {
    margin: 0;
    height: 100%;
}

body {
    background-color: #ffffff;
    font-family: Helvetica, Arial, sans-serif;
    text-align: center;
}

#app {
    position: relative;
    height: 100%;
    width: 100%;
    padding-top: 10px;
}

#app div {
    width: 100%;
}

#app div div {
    height: 100%;
}

#app div div div {
    position: relative;
    height: auto;
}

h1,
h2 {
    margin-left: 5%;
    margin-right: 5%;
}

button {
    border-radius: 8px;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    font-family: 'Oxygen', sans-serif;
    letter-spacing: 2px;
}

.black {
    color: black;
}

.white {
    color: white;
}

.light-button {
    background-color: rgba(255, 255, 255, 0.5);
    color: rgb(0, 0, 0);
}

.dark-button {
    background-color: rgba(0, 0, 0, 0.5);
    color: rgb(255, 255, 255);
}