html{
	box-sizing: border-box;
	background:#ffc600;
	font-family:'helvetica neue';
    font-size: 20px;
    font-weight: 200;

}

body{
	margin: 0;
}

.panels {
	min-height:100vh;
	overflow: hidden;
	display: flex;
}

.panel {
	background:#6B0F9C;
	box-shadow:inset 0 0 0 5px rgba(255,255,255,0.1);
	color:white;
	text-align: center;
	align-items:center;
	/* Safari transitionend event.propertyName === flex */
	/* Chrome + FF transitionend event.propertyName === flex-grow */
	transition:
	font-size 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
	flex 0.7s cubic-bezier(0.61,-0.19, 0.7,-0.11),
	background 0.2s;
	font-size: 20px;
	background-size:cover;
	background-position:center;
	flex: 1;
	justify-content: center;
	display: flex;
	flex-direction: column;

}

.panel1 { background-image:url(https://source.unsplash.com/gYl-UtwNg_I/1500x1500); }
.panel2 { background-image:url(https://source.unsplash.com/1CD3fd8kHnE/1500x1500); }
.panel3 { background-image:url(https://images.unsplash.com/photo-1465188162913-8fb5709d6d57?ixlib=rb-0.3.5&q=80&fm=jpg&crop=faces&cs=tinysrgb&w=1500&h=1500&fit=crop&s=967e8a713a4e395260793fc8c802901d); }
.panel4 { background-image:url(https://source.unsplash.com/ITjiVXcwVng/1500x1500); }
.panel5 { background-image:url(https://source.unsplash.com/3MNzGlQM7qs/1500x1500); }

/* Flex Items */
.panel > * {
	margin:0;
	width: 100%;
	transition:transform 0.5s;
	flex: 1 0 auto;
	display:flex;
	justify-content: center;
	align-items: center;
	/*border: 1px solid red;*/
}

.panel > *:first-child {  transform: translateY(-100%);  }
.panel.open-active> *:first-child {  transform: translateY(0%);  }

.panel > *:last-child {  transform: translateY(100%);  }
.panel.open-active> *:last-child {  transform: translateY(0%);  }


.panel p {
	text-transform: uppercase;
	font-family: 'Amatic SC', cursive;
	text-shadow:0 0 4px rgba(0, 0, 0, 0.72), 0 0 14px rgba(0, 0, 0, 0.45);
	font-size: 2em;
}
.panel p:nth-child(2) {
	font-size: 4em;
}

.panel.open {
	flex: 5;
	font-size:40px;
}