/* COCA-COLA */
a#btn_cocacola {
	position: relative;
    display: block;
    margin: 85px auto 0 auto;
	width: 220px;
	height: 80px;
	background: #e41d25;
	border-radius: 50px;
	text-align: center;
	overflow: hidden;
	box-shadow: 0 10px 20px rgba(0,0,0,.2);
	transition: all .3s ease;
}

a#btn_cocacola img {
	width: 60%;
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	filter: brightness(0) invert(1);
	z-index: 2;
}

a#btn_cocacola:before,
a#btn_cocacola:after,
a#btn_cocacola span {
	position: absolute;
	border-radius: 50%;
	z-index: 1;
	transition: transform 1s ease, opacity .9s ease;
}

a#btn_cocacola:before,
a#btn_cocacola:after {
	content: "";
	background: rgba(87, 48, 18, 0.719);
}

a#btn_cocacola:before {
	width: 40px;
	height: 40px;
	left: 30px;
	top: 40px;
}

a#btn_cocacola:after {
	width: 25px;
	height: 25px;
	right: 40px;
	top: 60px;
}

a#btn_cocacola span {
	width: 18px;
	height: 18px;
	background: rgba(255,255,255,0.2);
	left: 100px;
	top: 70px;
}

a#btn_cocacola:hover {
	overflow: visible;
	transform: translateY(-6px) scale(1.05);
	box-shadow: 0 18px 30px rgba(0,0,0,.25);
}

a#btn_cocacola:hover:before {
	transform: translateY(-75px);
	opacity: 0;
}

a#btn_cocacola:hover:after {
	transform: translateY(-80px);
	opacity: 0;
}

a#btn_cocacola:hover span {
	transform: translateY(-85px);
	opacity: 0;
}


/* APPLE */
a#btn_apple {
	position: relative;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	width: 130px;
	height: 130px;
	top: 50%;
	transform: translateY(-50%);
	margin-left: auto;
	margin-right: auto;
	border-radius: 26px;
	background-color: #111;
	color: #fff;
	text-decoration: none;
	font-family: 'Open Sans', sans-serif;
	font-size: 20px;
	font-weight: 600;
	box-shadow: 0 12px 30px rgba(0,0,0,.18);
	transition: transform .35s ease, box-shadow .35s ease, background-color .35s ease, color .35s ease;
}

a#btn_apple i {
	font-size: 48px;
	margin-bottom: 4px;
	line-height: 1;
}

a#btn_apple:hover {
	background-color: #f5f5f7;
	color: #111;
	box-shadow: 0 16px 32px rgba(0,0,0,.2);
}


/* IBM */
a#btn_ibm {
	display: block;
	margin: 108px auto 0 auto;
	width: 180px;
	text-align: center;
}

a#btn_ibm img {
	width: 140px;
	display: block;
	margin: 0 auto;
	filter: brightness(0);
	transition: filter .6s ease;
}

a#btn_ibm:hover img {
	filter: brightness(0) saturate(100%)
		invert(29%) sepia(96%) saturate(2154%)
		hue-rotate(203deg) brightness(97%) contrast(101%);
	transform: translateY(-3px);
}


/* NIKE */
a#btn_nike {
	position: relative;
	display: block;
	width: 200px;
	height: 80px;
	margin: 105px auto 0 auto;
	background-color: #111;
	overflow: hidden;
	text-decoration: none;
	box-shadow: 0 10px 20px rgba(0,0,0,.2);
	transition: transform .3s ease, box-shadow .3s ease;
}

a#btn_nike img {
	position: absolute;
	left: 25px;
	top: 50%;
	transform: translateY(-50%);
	width: 60px;
    filter: brightness(0) invert(1);
}

a#btn_nike span {
	position: absolute;
	top: 50%;
	right: -120px;
	transform: translateY(-50%);
	font-family: 'Montserrat', sans-serif;
	font-size: 26px;
	font-weight: 700;
	letter-spacing: 2px;
	color: #fff;
	transition: right .4s ease;
}

a#btn_nike:hover {
	transform: translateY(-4px) scale(1.03);
	box-shadow: 0 16px 28px rgba(0,0,0,.25);
}

a#btn_nike:hover span {
	right: 40px;
}


/* INSTAGRAM */
a#btn_instagram {
	position: relative;
	display: block;
	width: 120px;
	height: 120px;
	margin: 85px auto 0 auto;
	border-radius: 32px;
	overflow: hidden;
	text-decoration: none;
	background: linear-gradient(135deg, #f9ce34 0%, #ee2a7b 45%, #6228d7 100%);
	box-shadow: 0 12px 24px rgba(98,40,215,.28);
}

a#btn_instagram i {
	position: absolute;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	font-size: 56px;
	color: #fff;
	z-index: 3;
}

a#btn_instagram:hover i {
	animation: iconFlash .5s ease forwards;
}

a#btn_instagram:before,
a#btn_instagram:after {
	content: "";
	position: absolute;
	left: 0;
	width: 100%;
	height: 50%;
	background: #000000;
	z-index: 2;
}

a#btn_instagram:before {
	top: -50%;
}

a#btn_instagram:after {
	bottom: -50%;
}

a#btn_instagram:hover:before {
	animation: shutterTop .5s ease forwards;
}

a#btn_instagram:hover:after {
	animation: shutterBottom .5s ease forwards;
}

@keyframes shutterTop {
	0%   { top: -50%; }
	40%  { top: 0; }
	60%  { top: 0; }
	100% { top: -50%; }
}

@keyframes shutterBottom {
	0%   { bottom: -50%; }
	40%  { bottom: 0; }
	60%  { bottom: 0; }
	100% { bottom: -50%; }
}

@keyframes iconFlash {
	0%   { color: #fff; }
	40%  { color: #000; }
	60%  { color: #000; }
	100% { color: #fff; }
}