style.css

body {
	margin: 20px;
	font-family: 'Roboto', sans-serif;
}

header {
    text-align: center;
}

#mentorsMap {
	height: calc(100vh - 40px);
}

.leaflet-popup-content {
    align-items: center;
    display: flex;
    margin: 10px;
    max-width: 200px;
}

.leaflet-popup-content span {
	display: block;
}

.leaflet-popup-content .avatar {
	background-image: url(img/icon_48.png);
	background-size: cover;
	height: 64px;
    margin-right: 10px;
	width: 64px;
}
#searchQuery {
    border: 1px solid #ddd;
    display: block;
    font-size: 16px;
    padding: 12px 40px;
    margin-top: 12px;
    margin-bottom: 12px;
    width: calc(100% - 80px);
}
#tableHolder{
	height: 500px;
	overflow-y: auto;
}
#tableHolder table {
    border-collapse: collapse;
    width: 100%;
    border: 1px solid #ddd;
    font-size: 18px;
}

#tableHolder table th, #tableHolder table td {
    text-align: left;
    padding: 12px;
}

#tableHolder table tr {
    border-bottom: 1px solid #ddd; 
}

#tableHolder table tr.header, #tableHolder table tr:hover {
    background-color: #f1f1f1;
}

#forkongithub a {
    display: none;
    background: #000;
    color: #fff;
    text-decoration: none;
    font-family: arial, sans-serif;
    text-align: center;
    font-weight: bold;
    padding: 5px 40px;
    font-size: 1rem;
    line-height: 2rem;
    position: relative;
    transition: 0.5s;
}
#forkongithub a:hover {
    background: #c11;
    color: #fff;
}
#forkongithub a::before,
#forkongithub a::after {
    content: "";
    width: 100%;
    display: block;
    position: absolute;
    top: 1px;
    left: 0;
    height: 1px;
    background: #fff;
}
#forkongithub a::after {
    bottom: 1px;
    top: auto;
}

/* mobile first \o/ */
@media screen and (min-width: 376px) {
    .leaflet-popup-content {
        min-width: 350px;
    }
}

@media screen and (min-width: 800px) {
    #forkongithub {
        position: absolute;
        display: block;
        top: 0;
        right: 0;
        width: 200px;
        overflow: hidden;
        height: 200px;
        z-index: 9999;
    }
    #forkongithub a {
        display: block;
        width: 150px;
        position: absolute;
        top: 30px;
        right: -40px;
        font-size: 12px;
        padding: 0 10px;
        transform: rotate(45deg);
        -webkit-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
        -moz-transform: rotate(45deg);
        -o-transform: rotate(45deg);
        box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.8);
    }
}