* {
    margin: 0;
    padding: 0;
}

html {
    height: 100%;
}

body {
    font-family: 'Helvetica', sans-serif;
    font-size: 18px;
}

.CodeMirror {
    height: 100%;
}

#header-container {
    display: block;
    position: fixed;
    width: 320px;
    height: 55px;
    right: 30px;
    top: 40px;
    z-index: 999;
}

select {
    background-color: black;
    margin: 0 auto;
    color: white;
    width: 310px;
    padding: 15px;
    height: 50px;
    cursor: pointer;
    font-size: 20px;
    outline: none;
    border: 1px solid black;
}

select:hover {
    background-color: white;
    color: black;
    padding: 15px 5px 15px 25px;
}