/* ================================================================
   archive.css — Blog / News archive pages
================================================================ */

.arc-body {
	margin: 0;
	padding: 0;
	background: #f5f5f5;
	color: #1f1f1f;
	font-family: 'Helvetica Neue', Arial, 'Hiragino Kaku Gothic ProN', 'Hiragino Sans', Meiryo, sans-serif;
	-webkit-font-smoothing: antialiased;
}

.arc-body *,
.arc-body *::before,
.arc-body *::after {
	box-sizing: border-box;
}

.arc-body #masthead { display: none; }
.arc-body #page     { background: none; }
.arc-body #content  { display: none; }
.arc-body #colophon { display: none; }

.arc-body .fp-header {
	background: rgba(10, 10, 10, 0.95);
	box-shadow: 0 2px 20px rgba(0,0,0,0.3);
	backdrop-filter: blur(10px);
}

/* ================================================================
   HERO TITLE
================================================================ */
.arc-hero {
	background: #ffffff;
	padding: 140px 40px 60px;
	text-align: center;
	border-bottom: 1px solid rgba(0,0,0,0.08);
	position: relative;
	overflow: hidden;
}

.arc-hero__inner {
	position: relative;
	z-index: 1;
}

.arc-hero__title {
	font-size: clamp(48px, 8vw, 96px);
	font-weight: 700;
	letter-spacing: 0.3em;
	color: #1f1f1f;
	text-transform: uppercase;
	margin: 0 0 2px;
}

.arc-hero__sub {
	font-size: 13px;
	letter-spacing: 0.1em;
	color: #888;
	margin: 0;
}

/* ================================================================
   FILTER TABS
================================================================ */
.arc-filter {
	background: #fff;
	border-bottom: 1px solid rgba(0,0,0,0.08);
	padding: 0 40px;
}

.arc-filter__list {
	display: flex;
	list-style: none;
	margin: 0 auto;
	padding: 0;
	max-width: 1200px;
	gap: 0;
	overflow-x: auto;
	-ms-overflow-style: none;
	scrollbar-width: none;
}

.arc-filter__list::-webkit-scrollbar {
	display: none;
}

.arc-filter__item a,
.arc-filter__item span {
	display: block;
	padding: 20px 28px;
	font-size: 12px;
	font-weight: 700;
	letter-spacing: 0.15em;
	text-decoration: none;
	color: rgba(31,31,31,0.45);
	border-bottom: 2px solid transparent;
	white-space: nowrap;
	transition: all 0.3s ease;
	cursor: pointer;
}

.arc-filter__item.is-active a,
.arc-filter__item.is-active span {
	color: #1f1f1f;
	border-bottom-color: #1f1f1f;
}

.arc-filter__item a:hover {
	color: #1f1f1f;
}

/* ================================================================
   MAIN WRAPPER
================================================================ */
.arc-main {
	max-width: 1200px;
	margin: 0 auto;
	padding: 60px 40px 120px;
}

/* ================================================================
   CARD GRID (BLOG)
================================================================ */
.arc-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 24px;
	margin-bottom: 80px;
}

.arc-card {
	background: #fff;
	overflow: hidden;
	transition: box-shadow 0.3s ease;
}

.arc-card:hover {
	box-shadow: 0 8px 40px rgba(0,0,0,0.12);
}

.arc-card__link {
	display: block;
	text-decoration: none;
	color: inherit;
}

.arc-card__thumb-wrap {
	position: relative;
	padding-top: 62%;
	overflow: hidden;
	background: #ddd;
}

.arc-card__thumb {
	position: absolute;
	inset: 0;
	background-size: cover;
	background-position: center;
	transition: transform 0.6s ease;
}

.arc-card:hover .arc-card__thumb {
	transform: scale(1.04);
}


.arc-card__body {
	padding: 20px 24px 28px;
}

.arc-card__tags {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	margin-bottom: 12px;
}

.arc-card__tag {
	font-size: 11px;
	color: #0055cc;
	letter-spacing: 0.03em;
}

.arc-card__title {
	font-size: 15px;
	font-weight: 700;
	color: #1f1f1f;
	line-height: 1.7;
	margin: 0 0 12px;
}

.arc-card__excerpt {
	font-size: 13px;
	line-height: 1.8;
	color: rgba(31,31,31,0.55);
	margin: 0;
}

/* ================================================================
   NEWS LIST
================================================================ */
.arc-news-list {
	list-style: none;
	margin: 0 0 80px;
	padding: 0;
	max-width: 900px;
	margin-left: auto;
	margin-right: auto;
}

.arc-news-item {
	border-bottom: 1px solid rgba(0,0,0,0.1);
}

.arc-news-item:first-child {
	border-top: 1px solid rgba(0,0,0,0.1);
}

.arc-news-link {
	display: flex;
	align-items: baseline;
	gap: 32px;
	padding: 24px 0;
	text-decoration: none;
	transition: opacity 0.3s ease;
}

.arc-news-link:hover {
	opacity: 0.5;
}

.arc-news-date {
	font-size: 13px;
	color: #888;
	letter-spacing: 0.05em;
	white-space: nowrap;
	flex-shrink: 0;
}

.arc-news-title {
	font-size: 15px;
	font-weight: 500;
	color: #1f1f1f;
	line-height: 1.6;
}

/* ================================================================
   PAGINATION
================================================================ */
.arc-pagination {
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 6px;
}

.arc-pagination .page-numbers {
	display: flex;
	align-items: center;
	justify-content: center;
	width: 44px;
	height: 44px;
	font-size: 13px;
	font-weight: 700;
	text-decoration: none;
	color: #1f1f1f;
	border: 1px solid rgba(31,31,31,0.2);
	transition: all 0.3s ease;
}

.arc-pagination .page-numbers.current {
	background: #1f1f1f;
	color: #fff;
	border-color: #1f1f1f;
}

.arc-pagination .page-numbers:hover:not(.current) {
	background: #1f1f1f;
	color: #fff;
	border-color: #1f1f1f;
}

.arc-pagination .page-numbers.dots {
	border: none;
	background: none;
}

/* ================================================================
   RESPONSIVE
================================================================ */
@media (max-width: 960px) {
	.arc-grid {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 600px) {
	.arc-hero {
		padding: 100px 24px 40px;
	}

	/* 下限を下げてタイトルが長くても画面内に収まるよう 8vw でスケール */
	.arc-hero__title {
		font-size: clamp(18px, 8vw, 96px);
		letter-spacing: 0.15em;
	}

	.arc-filter {
		padding: 0 16px;
	}

	.arc-filter__item a,
	.arc-filter__item span {
		padding: 16px 16px;
	}

	.arc-main {
		padding: 40px 16px 80px;
	}

	.arc-grid {
		grid-template-columns: 1fr;
		gap: 16px;
	}

	.arc-news-link {
		flex-direction: column;
		gap: 6px;
	}
}