* {
	box-sizing: border-box;
}

body {
	margin: 0;
	min-height: 100vh;
	overflow-x: hidden;
}

#header {
	position: sticky;
	z-index: 1;
	top: 0;
	width: 100%;
	padding-inline: 2em;
	overflow: hidden;
	color: #505050;
	background-color: #bcdfff;
	display: flex;
	flex-direction: row;
	justify-content: space-between;
}

#header button {
    position: relative;
    overflow: hidden;
    border-radius: 3px;
    text-decoration: none;
    display: block;
    max-width: 250px;
    background: rgb(159, 183, 199);
    margin: 10px 5px;
    padding: 0px 20px;
    font-family: "Noto Sans Japanese";
    text-align: center;
    line-height: 1.8;
    text-decoration: none;
    font-weight: 500;
    outline: 0cap;
    color: #fff;
    transition: ease .2s;
	border: 0px;
}

#header button::before {
	content: '';
	position: absolute;
	top: 0;
	left: -75%;
	width: 50%;
	height: 100%;
	background: linear-gradient(to right, rgba(255,255,255,0) 0%, rgba(255, 255, 255, 0.3) 100%);
	transform: skewX(-25deg);
}

#header button:hover::before {
	animation: shine 0.7s;
}

@keyframes shine {
	100% {
		left: 125%;
	}
}

#main {
	padding-inline: 5vw;
}

#page_title {
	padding-left: 1em;
	border-left: 5px solid #aaa;
}

#footer {
	bottom: 0;
	width: 100%;
	padding-inline: 2em;
	overflow: hidden;
	color: #FFFFFF;
	background-color: #80A080;
	display: flex;
	flex-direction: row;
	justify-content: space-between;
}