header {
    height: 3em;
    display: block;
    background: rgba(10, 30, 50, .7);
    mix-blend-mode: multiply;
    background-blend-mode: multiply;
    -moz-transition: all .2s ease-in-out;
    -o-transition: all .2s ease-in-out;
    -webkit-transition: all .2s ease-in-out;
    -ms-transition: all .2s ease-in-out;
    transition: all .2s ease-in-out;
}

header img{
	margin-top: .5em;
	margin-left:3em;
}

main{
	overflow: hidden;
}

a#close{
	position: relative;
    left: 45%;
	width: 15px;
    display: block;
    background: rgba(10, 30, 50, .7);
    color: #fff;
    display: block;
    padding: .2em .7em;
    cursor: pointer;
    text-decoration: none;
}

ul li{list-style:none;margin:0;}
ul li::before{content:"・";}

.btn{margin:0 0 3em !important;}