sandbox.css

/* ========================================

    CODE YOUR STYLES BELOW!

   ====================================== */
body {
	font-size: 1rem;
	background-color: salmon;
}

main {
	display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.facebook-style-btn {
	border-radius: 2px;
	font-size: 0.9rem;
	padding: 6px 12px;
}

.facebook-style-dark {
	-moz-box-shadow: inset 0 1px 0 0 #4d73bf;
	-webkit-box-shadow: inset 0 1px 0 0 #4d73bf;
	box-shadow: inset 0px 1px 0 0 #4d73bf;
	background: #4267b2;
	border: solid 1px #4267b2;
	color: white;
	text-shadow: 0px 1px 0 #3359a5;
}

.facebook-style-dark:hover {
	background: #2b54a7;
}

.facebook-style-dark:active {
	background: #1d4698;
	border-color: #1d4698;
}

.facebook-style-light {
	background: #f6f7f9;
	border: 1px solid #ced0d4;
	color: #4b4f56;
}

.facebook-style-light:hover {
	background: #e9ebee;
}
.facebook-style-light:active {
	background: #d8dade;
	border-color: #d8dade;
}

.gradient-button-1 {
	position: relative;
	z-index: 1;
	display: inline-block;
	font-size: 1.4rem;
	padding: 20px 40px;
	box-sizing: border-box;
	background-color: #e7eef1;
	border: 10px solid transparent;
	border-image: linear-gradient(to top right);
}

.container {
	position: relative;
}
.thing i {
	position: absolute;
	top: 50%;
	left: 45%;
	font-size: 4rem;
	color: white;
	transition: all 0.3s linear;
}
.thing:hover i {
	/* animation: spin 1s linear infinite; */
	transform: rotate(90deg);
	transition: all 0.3s linear;
	/* font-size: 1.5rem; */
}

.transform-icon {
	position: relative;
}

.menu {
	position: absolute;
	height: 50px;
	top: 120%;
	left: 50%;
	transform: translate(-50%, -50%);
	cursor: pointer;
	transition: 0.5s;
}
.menu .bar {
	background: white;
	width: 60px;
	height: 10px;
	box-shadow: 0 0 10px 0 rgb(255, 255, 255, 0.5);
	transition: 0.4s;
	border-radius: 2px;
}

.menu .bar:not(:first-child) {
	margin-top: 10px;
}

.menu:hover .bar {
	box-shadow: 0 0 25px 0 rgb(255, 255, 255, 0.5);
}

#check:checked + .menu {
	transform: translate(-50%, -50%) rotateY(180deg);
}

#check:checked + .menu .bar:nth-child(1) {
	margin-top: 20px;
	transform: rotate(-45deg);
}
#check:checked + .menu .bar:nth-child(2) {
	opacity: 0;
}

#check:checked + .menu .bar:nth-child(3) {
	margin-top: -30px;
	transform: rotate(45deg);
}

#check {
	opacity: 0;
}

.drop-down-menu {
	width: 860px;
	margin: 0 auto;
}
.drop-down-menu ul {
	list-style: none;
	margin-top: 2%;
}

.drop-down-menu ul li {
	background: #262626;
	width: 170px;
	border: 1px solid #fff;
	height: 50px;
	line-height: 50px;
	text-align: center;
	float: left;
	color: #fff;
	position: relative;
}

.drop-down-menu ul li:hover {
	background: crimson;
}

/* .drop-down-menu ul ul {
	display: none;
} */

.drop-down-menu ul li:hover > ul {
	display: block;
}