@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;500;700;800;900&display=swap');

*{ box-sizing:border-box; }

body{
	max-width:100%;
	min-height:100%;
	margin:0;
	background:#f6f7fb;
	color:#1f2937;
	font-family:'Noto Sans JP', sans-serif;
}

header.sugaku{
	width:310px;
	height:48px;
	margin:0 auto 18px;
	color:#fff;
	background:#3b82f6;
	border-radius:0 0 22px 22px;
	box-shadow:0 6px 18px rgba(0,0,0,.18);
}

h1{
	margin:0;
	font-size:23px;
	line-height:48px;
	text-align:center;
	font-weight:800;
	letter-spacing:.04em;
}

article{ max-width:100%; }

ul{
	width:300px;
	margin:0 auto 18px;
	padding:16px 20px 16px 34px;
	background:#fff;
	border-radius:18px;
	box-shadow:0 6px 18px rgba(15,23,42,.08);
	font-size:15px;
	line-height:1.8;
	color:#374151;
}

.button-list{
	display:block;
	width:320px;
	margin:0 auto 30px;
}

button.viewBtn{
	display:flex;
	align-items:center;
	justify-content:space-between;
	gap:10px;
	width:320px;
	min-height:66px;
	margin:10px 0;
	padding:12px;
	border:2px solid #e6e8f5;
	border-radius:22px;
	background:#fff;
	color:#111827;
	box-shadow:0 6px 0 #dfe3f1, 0 10px 20px rgba(15,23,42,.08);
	font-family:'Noto Sans JP', sans-serif;
	text-align:left;
	cursor:pointer;
	transition:transform .15s ease, box-shadow .15s ease, background-color .15s ease, border-color .15s ease;
}

button.viewBtn:hover{
	transform:translateY(-2px);
	background:#dbeafe;
	border-color:#3b82f6;
	box-shadow:0 6px 16px rgba(15,23,42,.12);
}

button.viewBtn:active{
	transform:translateY(1px);
	box-shadow:0 2px 6px rgba(0,0,0,.12);
}

button.viewBtn:disabled{
	background:#f1f5f9;
	border-color:#e2e8f0;
	color:#94a3b8;
	box-shadow:none;
	cursor:not-allowed;
	transform:none;
}

.button-main{
	display:flex;
	align-items:center;
	min-width:0;
	flex:1;
}

span.no.sugaku{
	display:inline-block;
	flex:0 0 28px;
	width:28px;
	height:28px;
	margin-left:4px;
	margin-right:8px;
	border-radius:50%;
	background:#3b82f6;
	color:#fff;
	font-size:15px;
	line-height:28px;
	text-align:center;
	font-weight:800;
}

span.title{
	min-width:0;
	color:#111827;
	font-size:16px;
	font-weight:800;
	line-height:1.6;
}

span.pages{
	flex:0 0 auto;
	color:#64748b;
	font-size:14px;
	font-weight:700;
	white-space:nowrap;
}

.preparing{
	margin-left:4px;
	font-size:14px;
	opacity:.75;
}