body {
    background: url(../../assets/images/sihun-park-crystal-mine.jpg);
}

.btn:focus,.btn:active {
    outline: none !important;
    box-shadow: none;
 }

 .row {
    text-shadow:
		-1px -1px 0 #000,
		1px -1px 0 #000,
		-1px 1px 0 #000,
		1px 1px 0 #000;
 }

#blueCrystal {
    background: url(../../assets/images/002-gem.png);
    height: 64px;
    width: 64px;
}

#blueCrystal:hover {
    background: url(../../assets/images/002-gem.png);
    opacity: 0.6;
    height: 64px;
    width: 64px;
}

#orangeCrystal {
    background: url(../../assets/images/004-gem-2.png);
    height: 64px;
    width: 64px;
}

#orangeCrystal:hover {
    background: url(../../assets/images/004-gem-2.png);
    opacity: 0.6;
    height: 64px;
    width: 64px;
}

#greenCrystal {
    background: url(../../assets/images/007-gemstone.png);
    height: 64px;
    width: 64px;
}

#greenCrystal:hover {
    background: url(../../assets/images/007-gemstone.png);
    opacity: 0.6;
    height: 64px;
    width: 64px;
}

#redCrystal {
    background: url(../../assets/images/010-precious-stone.png);
    height: 64px;
    width: 64px;
}

#redCrystal:hover {
    background: url(../../assets/images/010-precious-stone.png);
    opacity: 0.6;
    height: 64px;
    width: 64px;
}