body,
button,
input {
    font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
    font-size: 15px;
}

body {
    margin: 0;
    padding: 25px;
}

p,
li {
    max-width: 800px;
}

label {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.demo {
    box-sizing: border-box;
    max-width: 100%;
    position: relative;
}

.small {
    height: 180px;
    width: 250px;
}

.medium {
    height: 250px;
    width: 300px;
}

.padded {
    padding: 20px;
}

.fullScreen {
    display: flex;
    flex-direction: column;
    height: 100%;
}

:not(:defined) {
    visibility: hidden;
}