/* CSS Document */

*{
	margin:0;padding:0;
	font-feature-settings: "palt";
	box-sizing: border-box;
}



img {border:0;}
address {font-style:normal;}
a{text-decoration:none;}

.m0auto{margin: 0 auto;}
.mb1{margin-bottom: 1em!important;}
.mb1-5{margin-bottom: 1.5em!important;}
.mb2{margin-bottom: 2em!important;}
.mb2-5{margin-bottom: 2.5em!important;}
.mb3{margin-bottom: 3em!important;}
.red {color: red;}
.yelllow {color: yellow;}
.white{color:white;}
.blue{color:blue;}
.green{color:green;}
.DechauOrange{color:#FF4200;}
.clear {clear:both;}
.copyright {font-size: 0.5em;margin: 20px 0;text-align: center;}

body{
	background: white;
	background-image: url("../img/back.webp");
	background-size: cover;
	background-position: center top;
	background-attachment: fixed;
	background-repeat: no-repeat;
}
.body1 {
	width: calc(100% - 2em);
	max-width: 700px; /** デザインの最大幅 **/
	margin: 0 auto;
	/*font-family: 'M PLUS 1p', sans-serif;*/
	font-family: "Helvetica Neue",Arial,
    "Hiragino Kaku Gothic ProN",
    "Hiragino Sans",
    Meiryo,
    sans-serif;
}

.img100per{
	width: 100%;
	display: flex;
	justify-content: center;
}
.img100per img{
	width: 100%;
}

.mainVisu{
	display: flex;
	justify-content: center;
}
.mainVisu img{
    width: 85%;
	max-width: 760px;
	height: auto;
	align-self: flex-start;
}
.mainTitle{
	width: 100%;
	margin-bottom: 2em;
	padding: 1.5em 1em;
	background: transparent;
}
.mainTitle img{
	width: 100%;
}
.mainTitle h1{
	font-family: "Hiragino Sans", Meiryo, sans-serif;
	letter-spacing: -0.06em;
	color: black;
	text-align: center;
	font-weight: 900;
	font-size: 1.8em;
	line-height: 1.3;
	margin-bottom: .5em;
}
.mainTitle p{
	color: black;
	text-align: center;
	width: 100%;
	margin: 0 auto;
	line-height: 1.8;
}
.embeddedWrap{
	display: flex;
	justify-content: center;
	background: white;
	border: 2px solid gray;
	border-radius: 10px;
	margin-bottom: 2em;
}
.embedded1{
	width: 100%;
	max-width: 812px;
	height: 85vh;
	border-radius: 10px;
}

.content {
  flex: 1;
}
footer {
	position: fixed;
  width: 100%;
  background: #44aa33;
}
/*
FlexBoxの設定
----------------------------------------------------------- */
/*コンテナ*/
.flexContainer{
	display:flex;
	justify-content: flex-start; /*水平方向の揃え設定*/
	align-items: stretch; /*垂直方向の揃え設定*/
}
/*アイテム*/
.flexItem{
	width: calc(100%/2 - 0.3em); /*分割数を指定*/
}
/*要素の真ん中に配置*/
.mannaka{
	display: flex;
	justify-content: center;
	align-items: center;
}
/*
 フェイドインクラス
----------------------------------------------------------- */
.fadeInUp {
  opacity: 1;
  transform: none;
  animation: logo-appear .8s ease-out both;
}
/*
 メディアクエリ 
----------------------------------------------------------- */
@media (min-width:600px){
	.mainTitle h1{
	font-size: 2.8em;
}
	.mainTitle p{
	font-size: 1.5em;
}
}

@media (max-width:600px){
	
}
@keyframes logo-appear { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { .fadeInUp { animation: none; } }
.dechauheaderContents a:focus-visible, a:focus-visible { outline: 3px solid #1877df; outline-offset: 3px; }
.mt10 img { display: block; width: 80%; max-width: 400px; height: auto; margin: auto; }
.copyright { padding: 1em .5em; }
@media (max-width: 600px) { .mainVisu img { width: 94%; } .mainTitle p { text-align: left; } .embedded1 { height: 75vh; min-height: 440px; } }

/* 動画本来の明るさと輪郭を保ち、白いハーフトーンドットを重ねる。 */
body { isolation: isolate; }
.videoBackground {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.videoBackground video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: none;
  opacity: 0;
  transition: opacity .6s ease;
}
.videoBackground.is-playing { background: #fff; }
.videoBackground.is-playing video { opacity: 1; }
.videoBackground::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  /* 明るいドットを4px間隔で配置。背景全体を暗くせず粗さを質感になじませる。 */
  background-image: radial-gradient(circle, rgba(255,255,255,.8) .75px, transparent 1px);
  background-size: 4px 4px;
  background-position: center;
  transition: opacity .6s ease;
}
.videoBackground.is-playing::after { opacity: 1; }
.mainVisu img { filter: drop-shadow(0 8px 24px rgba(0,0,0,.28)); }
@media (prefers-reduced-motion: reduce) {
  .videoBackground { display: none; }
}

/* 文字だけに白いガウス状の光彩を重ね、背景動画はそのまま見せる。 */
.mainTitle h1, .mainTitle p, .copyright {
  text-shadow:
    0 0 2px #fff,
    0 0 2px #fff,
    0 0 5px #fff,
    0 0 5px #fff,
    0 0 9px #fff,
    0 0 9px #fff,
    0 0 15px #fff;
}
.mainTitle p { font-weight: 600; }