* {
	box-sizing: border-box;
	-webkit-transition: 0.5s all ease;
	-moz-transition: 0.5s all ease;
	-ms-transition: 0.5s all ease;
	-o-transition: 0.5s all ease;
	transition: 0.5s all ease;
}

body {
	margin: 0px;
	padding: 0px;
	background-color: rgba(255, 255, 255, 1.0);
	color: rgba(33, 33, 33, 1.0);
	font-family: Arial, Verdana, sans-serif;
	font-size: 18px;
	overflow-y: scroll;
}

a {
	color: rgba(33, 33, 33, 1.0);
	text-decoration: none;
}

.dark_mode {
	background-color: rgba(50, 50, 50, 1.0);
	color: rgba(220, 220, 220, 1.0);
}

.dark_mode a {
	color: rgba(220, 220, 220, 1.0); 
}

.dark_mode .navi a {
	color: rgba(33, 33, 33, 1.0);
}

.dark_mode .rss_container .date_info {
	color: rgba(160, 160, 160, 1.0);
}

.dark_mode .rss_container a,
.dark_mode .setting_container a {
	border: 1px solid rgba(220, 220, 220, 1.0);
}

.dark_mode header {
	opacity: 0.8;
}

* {
	max-width: 100%;
	height: auto;
}

iframe {
	border: 1px solid rgba(33, 33, 33, 0.25);
	width: 100%;
	margin-top: 1em;
	min-height: 80vh;
}

header {
	position: relative;
	background-color: rgba(255, 50, 50, 1.0);
	padding: 2em;
	text-align: center;
	box-shadow: 0px 3px 3px rgba(0, 0, 0, 0.25);
	max-height: 10em;
}

header img {
	max-height: 6em;
}

section {
	position: relative;
	top: 14em;
	z-index: 5;
}

header:after,
section:after, 
.navi:after,
.header_fixed:after  {
	display: block;
	clear: both;
	width: 100%;
	height: 0px;
	content: " ";
}

h1 {
	font-size: 175%;
	margin-top: 0px;
}
h2 {
	font-size: 150%;
}
h3 {
	font-size: 125%;
}

.all {
	clear: both;
	width: 100%;
	margin-left: auto;
	margin-right: auto;
}

.header_fixed {
	position: fixed;
	width: 100%;
	top: 0px;
	right: 0px;
	left: 0px;
	height: 11em;
	z-index: 100;
}

.navi {
	width: 100%;
	font-size: 100%;
	margin-bottom: 1em;
}

.navi a {
	float: left;
	display: block;
	text-align: center;
	padding-top: 0.5em;
	padding-bottom: 0.5em;
	background-color: rgba(255, 180, 180, 1.0);
	width: 33.333%;
	height: 2em;
	border-right: 1px solid rgba(33, 33, 33, 0.25);
}

.navi a:last-child {
	border-right: 0px solid rgba(33, 33, 33, 0.0);
}

.navi a.active {
	background-color: rgba(255, 75, 75, 1.0);
}

.navi a:hover:not(.active) {
	background-color: rgba(255, 160, 160, 1.0);
}

.rss_container, 
.article_container,
.setting_container {
	width: 100%;
	display: none;
	padding-left: 1.25em;
	padding-right: 1.25em;
	max-width: 65em;
	margin-left: auto;
	margin-right: auto;
}

.rss_container a,
.setting_container a {
	display: block;
	padding: 0.5em;
	border: 1px solid rgba(33, 33, 33, 0.25);
}

.rss_container a:hover,
.setting_container a:hover {
	background-color: rgba(255, 50, 50, 0.5);	
}

.setting_container a.active {
	background-color: rgba(255, 75, 75, 0.75);	
}


.rss_container .date_info {
	color: rgba(33, 33, 33, 0.5);
}

.active {
	display: block;
}

a.button_orginal_article {
	width: 100%;
	background-color: rgba(255, 50, 50, 0.5);	
	color: rgba(245, 245, 245, 0.75);
	float: left;
	display: block;
	text-align: center;
	padding-top: 0.5em;
	padding-bottom: 0.5em;
	height: 2em;
	margin-bottom: 1em;
}

/* SCROLLED */

.all.scrolled_down .header_fixed {
	height: 3em;
}

.all.scrolled_down .header_fixed .navi {
	font-size: 100%;
}

.all.scrolled_down section {
	top: 8em;
}

.all.scrolled_down header img {
	max-height: 2em;
}

.all.scrolled_down header {
	padding: 1em;
}