header h1 {
    text-align: center;
    margin-top: 30px;
}

header h1 a {
    color: black;
    text-decoration: none;
}

header h1 a:hover, header h1 a:focus {
    color: black;
    text-decoration: none;
}

header h1 code {
    font-size: 1.5rem;
    font-weight: normal;
}

header h1 code span {
    font-size: 1rem;
}

header .menu {
    text-align: center;
}

header .menu a {
    display: inline-block;
    padding: 10px;
    color: royalblue;
    text-decoration: none;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    border: 1px solid royalblue;
    line-height: 1;
    margin: 0 6px;
}

header .menu a:hover, header .menu a:focus {
    background-color: royalblue;
    color: white;
}

.gallery {
    margin: 0 auto;
    text-align: center;
}

.gallery .dscr {
    font-size: 1.5rem;
}

.gallery a {
    display: inline-block;
    width: 190px;
    height: 190px;
    border: 0px solid royalblue;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    overflow: hidden;
    background-color: #0989a0;
    box-shadow: 0px 3px 0px #0f0f0f;
}

.gallery a img {
    display: block;
    width: 190px;
    height: 190px;
    padding: 10px 10px;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    overflow: hidden;
    -o-object-fit: cover;
    object-fit: cover;
    -o-object-position: center;
    object-position: center;
}

.usage {
    max-width: 610px;
    padding: 0 10px;
}

.usage h2, .usage h4, .usage h3 {
    text-align: center;
}

.usage h4 code {
    font-size: 1.5rem;
    font-weight: normal;
}

.usage code a {
    color: royalblue;
    text-decoration: none;
}

.usage code a:hover, footer code a:focus {
    text-decoration: underline;
}

.usage h3 code {
    font-weight: normal;
}

.usage pre {
    display: block;
    max-width: 600px;
    width: auto;
    margin: 0 auto;
    color: darkblue;
    border: 1px dotted royalblue;
    padding: 10px;
    line-height: 1.4;
    -webkit-border-radius: 4px;
    -moz-border-radius: 4px;
    border-radius: 4px;
    overflow: auto;
    background-color: white;
}

.usage pre span {
    color: royalblue;
}

.usage pre span em {
    color: orangered;
    font-style: normal;
}

@media only screen and (max-width: 640px) {
    .gallery a {
        width: 142px;
        height: 142px;
    }
    .gallery a img {
        width: 140px;
        height: 140px;
        padding: 8px 8px;
    }
}

.bg1 {
    background-color: #77d5db;
}