styles.css

body {
    margin: 0;
    font-size: 15px;
    line-height: 1.6;
    font-family: 'Montserrat', sans-serif;
    font-weight: 400;
    color: #3A3A3A;
}

* {
    box-sizing: border-box;
}

h1 {
    font-size: 2rem;
    line-height: 3rem;
    font-weight: 700;
}

h2 {
    font-size: 1.4rem;
    line-height: 2.8rem;
    font-weight: 400;
}

h3 {
    font-size: 1.1rem;
    line-height: 2.2rem;
    display: inline;
    font-weight: 700;
    vertical-align: middle;
}

.header {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    min-height: 32vh;
    text-align: center;
    display: flex;
    flex-flow: column;
    justify-content: center;
}

.button {
    display: inline-block;
    border: 1px solid;
    padding: 3px 10px 4px;
    border-radius: 3px;
    margin: 6px 12px 0 0;
    transition: .2s;
}

.button:hover {
    background: rgba(255, 255, 255, 0.5);
}

.icon {
    width: 24px;
    height: 24px;
    margin-right: 10px;
    vertical-align: middle;
    position: relative;
}

.icon--sub {
    fill: #333;
    width: 16px;
    height: 16px;
    margin: 0;
    vertical-align: sub;
}

.portfolio {
    list-style: none;
    padding: 0;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    width: 90%;
    max-width: 1200px;
}

.repo {
    position: relative;
    display: block;
    width: 32.33%;
    margin: .5%;
    padding: 30px 30px;
    background: rgba(171, 199, 55, 0.1);
    transition: .2s;
    margin-bottom: 1em;
}

@media (max-width: 960px) {
    .repo {
        width: 49%;
    }
}

@media (max-width: 600px) {
    .repo {
        width: 100%;
        margin: 0 0 20px;
    }
}

.repo:nth-of-type(3n) {
    border-right: 0;
}

.repo a {
    color: #abc737;
    text-decoration: none;
}

.repo .icon {
    fill: #abc737;
    background: transparent;
}

.repo--html {
    background: rgba(241, 101, 41, 0.1);
}

.repo--html .icon {
    fill: #F16529;
    background: transparent;
}

.repo--html a {
    color: #F16529;
}

.repo--css {
    background: rgba(41, 169, 223, 0.1);
}

.repo--css .icon {
    fill: #29A9DF;
    background: transparent;
}

.repo--css a {
    color: #29A9DF;
}

.repo--javascript {
    background: rgba(232, 201, 23, 0.1);
}

.repo--javascript .icon {
    fill: #C99C00;
    background: transparent;
}

.repo--javascript a {
    color: #C99C00;
}

.repo--php {
    background: rgba(97, 124, 190, 0.1);
}

.repo--php .icon {
    fill: #617CBE;
    background: transparent;
}

.repo--php a {
    color: #617CBE;
}

.repo--liquid {
    background: rgba(149, 190, 70, 0.1);
}

.repo--liquid .icon {
    fill: #95BE46;
    background: transparent;
}

.repo--liquid a {
    color: #95BE46;
}

.details {
    position: absolute;
    font-size: .8rem;
    top: 15px;
    right: 20px;
    opacity: 0.75;
}

.details span {
    margin-left: 16px;
}

.copy {
    text-align: center;
    color: #888;
    margin: 4em 0 3em 0;
}

.copy a {
    color: #666;
}