/* 各ページ共通
 * ====================================== */

body {
    background-color: rgb(219, 219, 219);
	/*margin: 60px;*/
	margin: 0;
}

html{
	padding: 0 0 50px 0;
	color: #000000;
	box-sizing: border-box;
}

p{
	letter-spacing: 0.1rem;
}

#logo {
    height: 45px;
    width: auto;
    margin: 0;
}

.fixedheader {
	background-color: rgb(0, 0, 0);
	height: 60px;
	width: 100%;
	position: fixed;
	top: 0;
	right: 0;
	z-index: 10;
	display: flex;
	justify-content: space-between;
	align-items: center;
	flex-wrap: wrap;
	padding: 5px;
	box-sizing: border-box;
}

.indexheader{
	width: 100%;
	margin: 150px 0 100px 0;
	text-align: center;
}

nav ul {
	display: flex;
	list-style-type: none;
	text-wrap: nowrap;
}

nav li a{
    margin-right: 2rem;
	top: 50%;
}

nav li a {
	color: #ffffff;
	text-decoration: none;
	-webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all  0.3s ease;
}

nav li a:hover {
	color: #c4c4c4;
	border-bottom: none;
}

.indexnav{
	display: flex;
	justify-content: center;
}

.indexnav li a{
  display: inline-block;
  padding: 0.5em 1em;
  text-decoration: none;
  background: #000000;
  color: #FFF;
  border-bottom: solid 5px rgb(180, 180, 180);
  border-radius: 3px;
}

nav .current a, .indexnav i:hover{
	border-bottom: none;
	text-decoration: none;
	background: #000000;
	color: #c4c4c4;
}



footer {
	padding-right: 20px;
	height: 30px;
	width: 100%;
	position: fixed;
	bottom: 0;
	left: 0;
	background-color: #000000;
	color: #deeef3;
}

#copyright {
	margin: 0;
	height: 28px;
}

/* メインページコンテンツ
*******************************/

#main{
	/*margin: 0 100px;*/
}

#main-visual{
	width: 100%;
	margin: 150px 0 100px 0;
	text-align: center;
}

#main-visual-img{
	width: 100%;
	height: auto;
	min-width: 200px;
	max-width: 800px;
	z-index: 10;
}

/* 自己紹介
*******************************/

#intro{
	margin: 50px;
}

h2{
	font-size: 2rem;
}

h3{
	font-size: 1.5rem;
}

#intro h2, h3{
	text-align: center;
}

#intro p{
	display: flex;
	justify-content: center;
	margin: 50px auto;
}

#fav h3{
	margin-top: 100px;
}

.first{
	display: inline-block;
	text-align: center;
	border: 2px solid #000;
	width: 2.3rem;
	height: 2.3rem;
	font-size: 2rem;
	padding: 0.1rem;
	margin-right: 0.2rem;
	position: relative;
}

.first::before{
	content: "";
	width: 2.5rem;
	height: 2.5rem;
	position: absolute;
	top: 0.3rem;
	left: 0.3rem;
	background-color: rgb(212, 205, 140);
	z-index: -1;
}

.fav_content{
	margin-top: 40px;
	margin-bottom: 40px;
	padding: 10px;
	background-color: #ffffff;
}

.credit, .comment{
	font-size: 0.8em;
	color: #666;
	margin-top: 4px;
}
.rbox{
	width: 100%;
	position: relative;
}

.r {
	width: 500px;
	margin-left: auto;
	margin-right: max(15%, 50px);
}

.rbox::after {
	content: "";
	position: absolute;
	top: -70%;
	right: 0;
	width: 100%;
	height: 200%;
	background-color: rgb(41, 41, 41);
	z-index: -1;
	clip-path: polygon(100% 20%, 40% 50%, 100% 100%);
}

.rbox::before {
	content: "";
	position: absolute;
	top: -90%;
	right: 0;
	width: 100%;
	height: 250%;
	background-color: rgb(180, 180, 180);
	z-index: -2;
	clip-path: polygon(100% 20%, 20% 55%, 100% 95%);
}

.l {
	width: 500px;
	margin-right: auto;
	margin-left: max(15%, 50px);
	position: relative;
}

.lbox{
	width: 100%;
	position: relative;
}

.lbox::after {
	content: "";
	position: absolute;
	top: -65%;
	right: 0;
	width: 100%;
	height: 200%;
	background-color: rgb(41, 41, 41);
	z-index: -1;

	clip-path: polygon(60% 50%, 0 0, 0 100%);
}

.lbox::before {
	content: "";
	position: absolute;
	top: -70%;
	right: 0;
	width: 100%;
	height: 200%;
	background-color: rgb(180, 180, 180);
	z-index: -5;

	clip-path: polygon(80% 70%, 0 0, 0 100%);
}

.game_title, .game_des {
	text-align: left;
}

.game_img{
	display: block;
	width: 90%;
	margin: 0 auto;
}

/* 課題
*******************************/
[class^="gamepage"] {
	margin-top: 100px;
}

.assignment_main{
	text-align: center;
	margin-top: 100px;
}

.assignment_grid{
	margin: 10%;
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 20px;
}

.assignment_card{
	display: flex;
  	flex-direction: column;
	padding: 10px;

	background-color: #ffffff;
	border-radius: 8px;

	box-shadow: 0 0 5px rgba(0, 0, 0, 0.2);

	transition: all 0.3s ease;
	overflow:	hidden;
	border-radius: 3px;
	-webkit-transition: all 0.3s ease;
    -moz-transition: all 0.3s ease;
    -o-transition: all 0.3s ease;
    transition: all  0.3s ease;
}

.assignment_card:hover{
	border-radius: 3px;
	box-shadow: 0px 0px 5px 5px rgba(255, 247, 0, 0.2);
}

.assignment_img{
	width: 100%;
	height: auto;
}

.assignment_image img{
	width: 100%;
	height: auto;
	display: block;
	border-radius: 4px;
}

.assignment_title{
	font-size: 1.2rem;
	text-align: left;
	text-decoration: none;
}

.assignment_grid a{
	text-decoration: none;
	color: #000;
}

.assignment_number{
	font-size: 2rem;
}

.assignment_description{
	flex-grow: 1;
}

/* じゃんけん
 * ====================================== */

.game_02 {
	border: 1px solid #ccc;
	border-radius: 5px;
	padding: 10px;
	margin: 10px auto;
	background-color: #fff;
	box-shadow: 0 0 10px rgba(0,0,0,0.1);
	text-align: center;
	max-width: 500px;
}
.buttons button {
	padding: 10px 20px;
	font-size: 1.2em;
	margin: 5px;
	border: 1px solid #ccc;
	border-radius: 5px;
	background-color: #f9f9f9;
	cursor: pointer;
	transition: background-color 0.3s;
}
.buttons button:hover {
	background-color: #e0e0e0;
}

/* レスポンシブ対応（スマホ版）
*******************************/
@media (max-width:650px) {
.fav_content{
	margin: 40px auto;
	padding: 10px;
	width: 90%;
}

.fixedheader {
	display: flex;
	align-items: center;
	flex-wrap: nowrap;
}

#logo{
	width: 0px;
}

.fixedheader nav{
	font-size: small;
}

.fixedheader li{
	width: 4rem;
	text-align: center;
}

.fixedheader li a{
	margin: 0 0.5rem;
}

nav ul {
	padding: 0;
	display: flex;
	list-style-type: none;
	flex-wrap: wrap; /* ← これを追加 */
}

nav li {
	white-space: nowrap; /* ← 各項目は折り返さない */
}

.indexnav li{
	margin-bottom: 20px;
}
}