CSS Code even though it probably doesn't matter

/*--------------------------------------------------------------
Typography
--------------------------------------------------------------*/

body,
button,
input,
select,
textarea {
    font-family: 'Source Sans Pro', 'Helvetica', Arial, sans-serif;
    font-size: 18px;
    line-height: 1.5;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    clear: both;
}

p {
    margin-bottom: 1.5em;
}

b,
strong {
    font-weight: bold;
}

dfn,
cite,
em,
i {
    font-style: italic;
}

blockquote {
    margin: 0 1.5em;
}

address {
    margin: 0 0 1.5em;
}

pre {
    background: #eee;
    font-family: "Courier 10 Pitch", Courier, monospace;
    font-size: 15px;
    font-size: 1.5rem;
    line-height: 1.6;
    margin-bottom: 1.6em;
    max-width: 100%;
    overflow: auto;
    padding: 1.6em;
}

code,
kbd,
tt,
var {
    font: 15px Monaco, Consolas, "Andale Mono", "DejaVu Sans Mono", monospace;
}

abbr,
acronym {
    border-bottom: 1px dotted #666;
    cursor: help;
}

mark,
ins {
    background: #fff9c0;
    text-decoration: none;
}

sup,
sub {
    font-size: 75%;
    height: 0;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
}

sup {
    bottom: 1ex;
}

sub {
    top: .5ex;
}

small {
    font-size: 75%;
}

big {
    font-size: 125%;
}

/*--------------------------------------------------------------
Layout
--------------------------------------------------------------*/
body {
    margin: 0;
    padding: 0;
}

.masthead {
    padding: 1em 2em;
    background-color: #0D1B2E;
    color: white;
}

.masthead h1 {
    text-align: center;
}

.intro {
    padding: 2em 2em;
    color: #ffffff;
    background: #429890;
}


.intro p,
.test-area {
    margin: 0 auto;
    max-width: 550px;
}

.test-area {
    margin-bottom: 4em;
    padding: 0 2em;
}

.test-wrapper {
    border: 10px solid grey;
    border-radius: 10px;
}

#origin-text {
    margin: 1em 0;
    padding: 1em 1em 0;
    background-color: #ededed;
}

#origin-text p {
    margin: 0;
    padding-bottom: 1em;
}

.test-wrapper {
    display: flex;
}

.test-wrapper textarea {
    flex: 1;
}

.meta {
    margin-top: 1em;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.timer {
    font-size: 3em;
    font-weight: bold;
}

#reset {
    padding: .5em 1em;
    font-size: 1.2em;
    font-weight: bold;
    color: #E95D0F;
    background: white ;
    border: 10px solid #E95D0F;
}

#reset:hover {
    color: white;
    background-color: #E95D0F;
}