:root {
	--teal: #8bc6b2;
	--brown: #9a7b5e;
	--red: #c82b2a;
	--peach: #fbd38d;
	--l-blue: #a0aec0;
	--d-blue: #1a202c;
	--fonts: natsuzemi, ms pgothic, arial;
}

mark {
	background: var(--peach);
}

h1 {
	color: var(--red);
}

h2 {
	color: var(--l-blue);
}

h3 {
	color: var(--brown);
	text-align: center;
}

b {
	color: var(--red);
}

u {
	color: var(--brown);
}

::selection {
	background: var(--red);
	color: var(--peach);
}

.box:last-child {
	margin-bottom: 60px;
}

.current {
	color: var(--red);
}

.form {
	min-height: 200px;
}

body {
	font-family: var(--fonts);
	padding-top: 50px;
	background: #ffe0a7;
	background-image: url(!g/bg.png);
	background-repeat: no-repeat;
	background-position: right top;
	background-attachment: fixed;
	background-size: contain;
	color: var(--d-blue);
}

summary {
	cursor: help;
}

a {
	text-decoration: underline;
	transition-duration: 0.1s;
	padding: 1px;
	border-radius: 5px;
	color: var(--teal);
}

a:hover {
	background: var(--d-blue);
	text-decoration: none;
}

li {
	list-style-type: square;
	list-style-position: inside;
	margin-top: 10px;
}

body {
	font-size: 16px;
	line-height: 20px;
	word-spacing: 3px;
	font-family: var(--fonts);
	word-wrap: break-word;
	word-break: normal;
	margin: 0px;
}

header,
.box {
	border-radius: 20px;
	background: rgb(255, 255, 255, 0.9);
	border: 2px solid var(--l-blue);
	box-shadow: 1px 1px 20px var(--l-blue) inset;
	max-width: 600px;
	padding: 20px;
	overflow: auto;
	margin: 20px 0 0px 60px;
}

nav {
	border: 0px;
	color: white;
	text-align: center;
	z-index: 3;
	width: 100%;
	position: fixed;
	top: 0px;
	padding: 5px;
	overflow: auto;
	border-radius: 0px;
	background: var(--l-blue);
	text-shadow: none;
	border-top: none;
}

nav a {
	color: white;
	padding-left: 10px;
	text-decoration: none;
}

nav a::before {
	content: "～";
}

#s-m-t-tooltip {
	max-width: 200px;
	text-align: center;
	z-index: 9999;
	margin: 30px 15px 7px 12px;
	padding: 5px;
	border-radius: 10px;
	color: white;
	background: var(--brown);
}

@media only screen and (max-width: 750px) {
	header,
	.box {
		position: relative;
		max-width: 100%;
		margin: 20px 10px 0px 10px;
		right: 0px;
		left: 0px;
		bottom: 0px;
		top: 0px;
	}
}