* {
    box-sizing: border-box
}

body {
    font-family: 'Verdana', sans-serif;
    margin: 20px 0;
    background: #7a7a7a;
}

a {
    color: #2a99b6;
}

a:hover {
    color: #33bbdf;
}

header, footer, div.page {
    /*width: 760px;*/
    /*margin: 0 auto;*/
    background: #323232;
    padding: 20px 15px;
}

header, footer {
    color: #ffffff;
}

header h1 {
    font-weight: normal;
    font-size: 42px;
}

/* Normalize the lists */
.menu {
    margin: 0;
    padding: 0;
}

.menu li {
    margin: 0;
}

/* Baseline for our menu */
.navigation {
    line-height: 1;
}

.navigation .menu a,
.navigation .menu li {
    display: block;
}

.navigation .menu a {
    text-decoration: none;
    color: currentColor;
    padding: 1em;
}

.navigation .menu li {
    border-style: solid;
    border-width: 0 0 1px;
}

/* Screen breakpoints
 *
 * Some quick settings to make the menu respond appropriately
 * to different screen sizes.
 */
@media only screen and (min-width: 750px) {
    /* Baseline */
    .navigation .menu {
        display: flex;
    }

    .navigation .menu > li {
        border-width: 0 1px 0 0;
    }

    .navigation .menu > li > a {
        padding: 1.25em 1.5em;
    }
}

/* Easy theming */
.navigation {
    background-color: #222;
    color: rgba(255, 255, 255, 0.75);
}

.navigation .menu li {
    border-color: #2a2a2a;
}

.navigation .menu li:hover > a, .navigation .menu li:focus > a, .navigation .menu li:active > a {
    color: rgba(255, 255, 255, 0.9);
    background-color: black;
}

div.page {
    background: #eeeeee;
}

h2 {
    font-size: 2.5rem;
}

h3 {
    font-size: 1.9rem;
}

.parent {
    position: relative;
}

.scrollToTopBtn {
    background-color: #7a7a7a;
    border: none;
    border-radius: 50%;
    color: #eeeeee;
    cursor: pointer;
    font-size: 3rem;
    width: 48px;
    height: 48px;
    padding: inherit;

    /* place it at the bottom right corner */
    position: absolute;
    bottom: 70px;
    right: 20px;
    /* keep it at the top of everything else */
    z-index: 100;
    /* hide with opacity */
    opacity: 0;
    /* also add a translate effect */
    transform: translateY(100px);
    /* and a transition */
    transition: all .5s ease
}

.showBtn {
    opacity: 1;
    transform: translateY(0)
}

img[src~="thumbnail"] {
    width: 150px;
    padding-right: 1rem;
}

.resp-container {
    position: relative;
    overflow: hidden;
    padding-top: 56.25%;
    margin-bottom: 2rem;
}

.resp-iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

img {
    max-width: 100%;
    max-height: 100%;
}

@media screen and (min-width: 30em) {
    img[src~="thumbnail"] {
        float: left;
    }
}