/* --- 基本設定 --- */
:root {
	--primary-color: #004d80;
	--accent-color: #e6f2ff;
	--text-color: #333;
	--bg-color: #f9f9f9;
	--white: #ffffff;
}

body {
	font-family: 'Noto Sans JP', sans-serif;
	background-color: var(--bg-color);
	color: var(--text-color);
	margin: 0;
	padding: 0;
	line-height: 1.8;
}

a { color: var(--primary-color); text-decoration: none; }
a:hover { text-decoration: underline; }

/* --- ヘッダー --- */
header {
	background-color: var(--white);
	border-bottom: 1px solid #ddd;
	padding: 1rem 0;
	text-align: center;
}
.site-title {
	font-size: 1.5rem;
	font-weight: 700;
	color: var(--primary-color);
	letter-spacing: 0.05em;
}
.site-desc { font-size: 0.8rem; color: #666; }

/* --- レイアウト --- */
.container {
	max-width: 1100px;
	margin: 0 auto;
	padding: 20px;
	display: flex;
	gap: 40px;
}

/* --- メインコンテンツ --- */
main { flex: 3; }

article {
	background: var(--white);
	padding: 40px;
	border-radius: 8px;
	box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

h1 {
	font-size: 1.8rem;
	border-bottom: 3px solid var(--primary-color);
	padding-bottom: 15px;
	margin-bottom: 20px;
	line-height: 1.4;
}
.meta-info {
	font-size: 0.85rem;
	color: #777;
	margin-bottom: 30px;
}
.tag {
	background: #eee;
	padding: 2px 8px;
	border-radius: 4px;
	margin-right: 10px;
}

h2 {
	font-size: 1.4rem;
	background: var(--accent-color);
	padding: 10px 15px;
	border-left: 5px solid var(--primary-color);
	margin-top: 40px;
	margin-bottom: 20px;
}

h3 {
	font-size: 1.2rem;
	border-bottom: 1px dashed #ccc;
	padding-bottom: 5px;
	margin-top: 30px;
	color: #444;
}

p { margin-bottom: 1.5em; }

ul { margin-bottom: 1.5em; }

.lead-box {
	background: #f0f8ff;
	border: 1px solid #cce5ff;
	padding: 20px;
	border-radius: 5px;
	margin-bottom: 30px;
}

/* 画像引用エリア */
figure {
	margin: 30px 0;
	text-align: center;
	background: #fff;
	padding: 10px;
	border: 1px solid #eee;
}
figure img {
	max-width: 100%;
	height: auto;
	border: 1px solid #ddd;
}
figcaption {
	font-size: 0.8rem;
	color: #666;
	margin-top: 10px;
	font-weight: bold;
}

/* テーブル */
table.patent-data {
	width: 100%;
	border-collapse: collapse;
	margin: 30px 0;
	font-size: 0.9rem;
}
table.patent-data th, table.patent-data td {
	border: 1px solid #ddd;
	padding: 12px;
}
table.patent-data th {
	background-color: #f5f5f5;
	width: 30%;
	text-align: left;
}

/* 技術のポイント（コラム） */
.column-box {
	background-color: #fff8e1;
	border: 1px solid #ffe082;
	padding: 20px;
	border-radius: 8px;
	margin: 40px 0;
	box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}
.column-title {
	font-weight: bold;
	font-size: 1.1rem;
	color: #f57f17;
	margin-bottom: 15px;
	display: block;
	border-bottom: 2px solid #ffe082;
	padding-bottom: 5px;
}
.column-box ul {
	background: #fff;
	padding: 15px 15px 15px 35px;
	border-radius: 5px;
}

/* --- サイドバー --- */
aside { flex: 1; }

.sidebar-widget {
	background: var(--white);
	padding: 20px;
	border-radius: 8px;
	margin-bottom: 20px;
	box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.widget-title {
	font-size: 1.1rem;
	border-bottom: 2px solid #ddd;
	padding-bottom: 10px;
	margin-bottom: 15px;
}

.ad-slot {
	background-color: #f0f0f0;
	color: #999;
	text-align: center;
	padding: 20px 0;
	margin: 30px 0;
	border: 1px dashed #ccc;
	font-size: 0.8rem;
}

footer {
	background: #333;
	color: #fff;
	text-align: center;
	padding: 20px 0;
	margin-top: 50px;
	font-size: 0.8rem;
}

@media (max-width: 768px) {
	.container { flex-direction: column; }
	h1 { font-size: 1.4rem; }
	main, aside { width: 100%; }
}

/* --- SNSシェアボタン --- */
.share-buttons {
	margin: 40px 0;
	text-align: center;
}

.share-title {
	font-size: 1rem;
	font-weight: bold;
	color: #555;
	margin-bottom: 15px;
}

.share-buttons-inner {
	display: flex;
	justify-content: center;
	gap: 10px;
	flex-wrap: wrap;
}

.btn-share {
	display: flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	padding: 10px 20px;
	border-radius: 50px;
	color: #fff;
	font-weight: bold;
	font-size: 0.95rem;
	text-decoration: none;
	transition: opacity 0.3s;
	min-width: 110px;
}

.btn-share:hover {
	opacity: 0.8;
	text-decoration: none;
}

/* 各SNSのブランドカラー */
.btn-x { background-color: #000000; }
.btn-fb { background-color: #1877f2; }
.btn-line { background-color: #06c755; }

/* スマホ用の微調整 */
@media (max-width: 768px) {
	.btn-share {
		flex: 1; /* スマホでは均等な幅に広げる */
		padding: 10px 5px;
		min-width: auto;
	}
	.btn-share span {
		font-size: 0.85rem;
	}
}

/* --- サイドバーリスト用 --- */
.sidebar-list {
	list-style-type: none;
	padding-left: 0;
	margin: 0;
	font-size: 0.9rem;
}
.sidebar-list li {
	margin-bottom: 10px;
	border-bottom: 1px dotted #eee;
	padding-bottom: 10px;
}
.sidebar-list li:last-child {
	margin-bottom: 0;
	border-bottom: none;
	padding-bottom: 0;
}
.sidebar-list a {
	color: var(--text-color);
	display: block;
}
.sidebar-list a:hover {
	color: var(--primary-color);
	text-decoration: none;
}

/* --- カードレイアウト（トップページ用） --- */
.card-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); /* 画面幅に合わせて列数を自動調整 */
	gap: 25px;
	margin-top: 20px;
}

.card {
	background: #fff;
	border-radius: 8px;
	box-shadow: 0 2px 8px rgba(0,0,0,0.08);
	overflow: hidden;
	transition: transform 0.2s, box-shadow 0.2s;
	display: flex;
	flex-direction: column;
}

.card:hover {
	transform: translateY(-4px);
	box-shadow: 0 6px 15px rgba(0,0,0,0.15);
}

.card-link {
	text-decoration: none;
	color: inherit;
	display: flex;
	flex-direction: column;
	height: 100%;
}

.card-link:hover {
	text-decoration: none;
}

/* 画像を常に16:9で綺麗に表示するトリック */
.card-img-wrapper {
	width: 100%;
	padding-top: 56.25%; /* 16:9 */
	position: relative;
	background-color: #f5f5f5;
	border-bottom: 1px solid #eee;
}

.card-img-wrapper img {
	position: absolute;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	object-fit: cover; /* 画像をはみ出させずに綺麗に埋める */
}

.card-content {
	padding: 15px;
	flex-grow: 1;
	display: flex;
	flex-direction: column;
}

.card-meta {
	display: flex;
	justify-content: space-between;
	align-items: center;
	margin-bottom: 10px;
}

.card-category {
	background-color: var(--primary-color);
	color: #fff;
	padding: 3px 8px;
	border-radius: 4px;
	font-size: 0.75rem;
	font-weight: bold;
}

.card-date {
	font-size: 0.8rem;
	color: #888;
}

.card-title {
	font-size: 1.1rem;
	font-weight: bold;
	color: #333;
	line-height: 1.5;
	margin: 0 0 15px 0;
	flex-grow: 1; /* タイトルが短くても下の要素を押し下げる */
	border-bottom: none; /* 個別記事の見出しスタイルを打ち消す */
	padding-bottom: 0;
}

.card-award {
	display: inline-block;
	background-color: #fff8e1;
	color: #f57f17;
	border: 1px solid #ffe082;
	padding: 3px 8px;
	border-radius: 4px;
	font-size: 0.75rem;
	font-weight: bold;
}