* {
	box-sizing: border-box;
}

html,
body {
	height: 100%;
	width: 100%;
	margin: 0;
	scroll-behavior: smooth;
}

.wrap {
	max-width: 480px;
	margin: auto;
}

video {
	width: 100%;
}

.twitter {
	padding: 0 20px;
	margin: auto;
}

.twitter_box {
	height: 400px;
	width: 1040px;
	overflow: scroll;
}

.youtube_box {
	position: relative;
	width: 100%;
	height: 0;
	padding-top: 56.25%;
}
.youtube_box iframe {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
}

.btn_group {
	position: fixed;
	bottom: 10px;
	right: 10px;
}
.btn2 {
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;
	width: 50px;
	height: 50px;
	background: #333;
	border-radius: 10px;
	text-decoration: none;
	transition: 0.1s;
	filter: drop-shadow(2px 3px 3px rgba(0, 0, 0, 0.5));
}
.btn2::before {
	content: "";
	width: 6px;
	height: 6px;
	border: 3px solid;
	border-color: #fff transparent transparent #fff;
	transform: rotate(45deg);
	margin-top: 2px;
}
.btn2::after {
	content: "TOP";
	color: #fff;
	font-weight: bold;
	font-size: 13px;
}
.btn2:hover {
	filter: drop-shadow(1px 1px 1px rgba(0, 0, 0, 0.5));
}


/*トップメニュー設定*/
.shadows {
	filter: drop-shadow(4px 4px 2px rgba(0, 0, 0, 0.5));
}
.shadows:hover {
	transition: all 0.3s ease-in-out;
	filter: brightness(130%);
}