/* pages-case-studies.css — Case studies archive + single (旧 pages-features.css 929-1429) */


/* ==========================================================================
   Case Studies Archive — Magazine editorial layout (2026-05-09)
   archive-case_studies.php / .worso-cs__*
   ========================================================================== */

/* ---------- Summary strip (light, sits below the standard worso-page__hero) ---------- */
.worso-cs__summary {
	background: var(--worso-bg-soft, #F8FAFC);
	border-bottom: 1px solid var(--worso-border, #dde0e6);
	padding: 36px 0;
}
.worso-cs__summary > .worso-container {
	display: flex;
	flex-direction: column;
	gap: 22px;
}
.worso-cs__summary-lead {
	margin: 0;
	font-size: var(--worso-fs-md, 15px);
	line-height: var(--worso-lh-base, 1.75);
	color: var(--worso-ink, #1e2130);
	max-width: 760px;
}
.worso-cs__summary-stats {
	margin: 0;
	display: grid;
	grid-template-columns: repeat(3, minmax(0, 1fr));
	gap: 0;
	background: var(--worso-white);
	border: 1px solid var(--worso-border, #dde0e6);
	border-radius: var(--worso-radius, 16px);
	padding: 22px 28px;
	box-shadow: var(--worso-shadow-sm, 0 1px 2px rgba(16,19,30,0.04));
}
.worso-cs__summary-stat {
	margin: 0;
	padding: 0 24px;
	border-left: 1px solid var(--worso-border, #dde0e6);
	display: flex;
	flex-direction: column;
	gap: var(--worso-sp-2);
}
.worso-cs__summary-stat:first-child {
	padding-left: 0;
	border-left: 0;
}
.worso-cs__summary-stat-label {
	font-size: var(--worso-fs-xs, 12px);
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--worso-ink-muted, #6B7280);
	font-weight: 600;
}
.worso-cs__summary-stat-value {
	margin: 0;
	display: flex;
	align-items: baseline;
	gap: 6px;
	color: var(--worso-ink-dk, #10131e);
	font-weight: 700;
	line-height: 1;
}
.worso-cs__summary-stat-num {
	font-size: clamp(28px, 4vw, 40px);
	letter-spacing: -0.01em;
	font-feature-settings: "tnum";
	color: var(--worso-lime-dk, #127c09);
}
.worso-cs__summary-stat-unit {
	font-size: var(--worso-fs-md, 15px);
	color: var(--worso-ink-muted, #6B7280);
	font-weight: 600;
}
.worso-cs__summary-stat-value--text {
	font-size: var(--worso-fs-xl, 18px);
	font-weight: 700;
	color: var(--worso-ink-dk, #10131e);
	line-height: 1.4;
}

/* ---------- Sticky case index ---------- */
.worso-cs__index {
	position: sticky;
	top: 0;
	z-index: 30;
	background: rgba(255, 255, 255, 0.94);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
	border-bottom: 1px solid var(--worso-border, #dde0e6);
	padding: var(--worso-sp-3) 0;
}
.worso-cs__index-inner {
	display: flex;
	align-items: center;
	gap: var(--worso-sp-6);
}
.worso-cs__index-label {
	flex: none;
	font-size: var(--worso-fs-xs, 12px);
	letter-spacing: 0.16em;
	text-transform: uppercase;
	font-weight: 700;
	color: var(--worso-ink-muted, #6B7280);
}
.worso-cs__index-list {
	list-style: none;
	/* 上下 4px の余白 + 反対方向の負マージンで、ホバー時 translateY(-1px) が
	   overflow-x: auto による垂直クリップに食われないようにする */
	margin: -4px 0;
	padding: 4px 0;
	display: flex;
	gap: var(--worso-sp-2);
	overflow-x: auto;
	overflow-y: hidden;
	scrollbar-width: none;
	-ms-overflow-style: none;
}
.worso-cs__index-list::-webkit-scrollbar { display: none; }
.worso-cs__index-item { flex: none; }
.worso-cs__index-link {
	display: inline-flex;
	align-items: center;
	gap: var(--worso-sp-2);
	padding: 8px 14px;
	border: 1px solid var(--worso-border, #dde0e6);
	border-radius: var(--worso-radius-pill, 9999px);
	background: var(--worso-white);
	font-size: var(--worso-fs-sm, 13px);
	font-weight: 600;
	color: var(--worso-ink, #1e2130);
	text-decoration: none;
	white-space: nowrap;
	transition: border-color .15s, color .15s, background .15s, transform .15s;
}
.worso-cs__index-link:hover,
.worso-cs__index-link:focus-visible {
	border-color: var(--worso-lime-dk, #127c09);
	color: var(--worso-lime-dk, #127c09);
	background: var(--worso-lime-bg, #eaf7e6);
	transform: translateY(-1px);
}
.worso-cs__index-num {
	font-feature-settings: "tnum";
	font-weight: 800;
	letter-spacing: 0.04em;
	color: var(--worso-lime-dk, #127c09);
	font-size: var(--worso-fs-xs, 12px);
}
.worso-cs__index-flag {
	font-size: var(--worso-fs-md, 15px);
	line-height: 1;
}
.worso-cs__index-title {
	font-size: var(--worso-fs-sm, 13px);
}

/* ---------- Body container ---------- */
.worso-cs__body {
	padding: 80px 0 96px;
	background: var(--worso-bg-soft, #F8FAFC);
}

/* ---------- Article block ---------- */
.worso-cs__article {
	background: var(--worso-white);
	border: 1px solid var(--worso-border, #dde0e6);
	border-radius: var(--worso-radius-lg, 20px);
	padding: 56px;
	margin: 0 0 48px;
	box-shadow: var(--worso-shadow-sm, 0 1px 2px rgba(16,19,30,0.04));
	scroll-margin-top: 96px;
}
.worso-cs__article:last-of-type { margin-bottom: 0; }

/* article header */
.worso-cs__article-head {
	display: flex;
	flex-direction: column;
	gap: var(--worso-sp-4);
	padding-bottom: 32px;
	margin-bottom: 32px;
	border-bottom: 1px solid var(--worso-border, #dde0e6);
}
.worso-cs__article-meta {
	display: flex;
	align-items: center;
	gap: var(--worso-sp-4);
	flex-wrap: wrap;
}
.worso-cs__article-num {
	display: inline-flex;
	align-items: center;
	padding: 6px 12px;
	background: var(--worso-green-700);
	color: var(--worso-white);
	border-radius: var(--worso-radius-sm, 8px);
	font-size: var(--worso-fs-xs, 12px);
	font-weight: 800;
	letter-spacing: 0.18em;
	font-feature-settings: "tnum";
}
.worso-cs__article-region {
	display: inline-flex;
	align-items: center;
	gap: var(--worso-sp-2);
	padding: 6px 14px;
	border: 1px solid var(--worso-border, #dde0e6);
	border-radius: var(--worso-radius-pill, 9999px);
	font-size: var(--worso-fs-sm, 13px);
	font-weight: 600;
	color: var(--worso-ink, #1e2130);
	background: var(--worso-bg-soft, #F8FAFC);
}
.worso-cs__article-flag {
	font-size: var(--worso-fs-lg, 16px);
	line-height: 1;
}
.worso-cs__article-title {
	margin: 0;
	font-size: clamp(26px, 3.4vw, var(--worso-fs-5xl, 32px));
	line-height: var(--worso-lh-tight, 1.25);
	letter-spacing: -0.01em;
	font-weight: 800;
	color: var(--worso-ink-dk, #10131e);
}
.worso-cs__article-tags {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
	gap: var(--worso-sp-3);
}
.worso-cs__article-tag {
	display: inline-flex;
	align-items: center;
	gap: var(--worso-sp-2);
	padding: 6px 12px;
	background: var(--worso-bg-soft, #F8FAFC);
	border: 1px solid var(--worso-border, #dde0e6);
	border-radius: var(--worso-radius-sm, 8px);
	font-size: var(--worso-fs-sm, 13px);
	color: var(--worso-ink, #1e2130);
}
.worso-cs__article-tag svg { color: var(--worso-ink-muted, #6B7280); flex: none; }
.worso-cs__article-tag-label {
	font-size: var(--worso-fs-2xs, 11px);
	letter-spacing: 0.12em;
	text-transform: uppercase;
	color: var(--worso-ink-muted, #6B7280);
	font-weight: 600;
}
.worso-cs__article-tag-value {
	font-weight: 700;
	color: var(--worso-ink-dk, #10131e);
}

/* outcome banner — most prominent */
.worso-cs__outcome {
	position: relative;
	margin: 0 0 32px;
	padding: 32px 36px 32px 88px;
	background: linear-gradient(135deg, var(--worso-green-600) 0%, var(--worso-green-700) 100%);
	border-radius: var(--worso-radius, 16px);
	color: var(--worso-white);
	overflow: hidden;
	box-shadow: 0 6px 18px rgba(18, 124, 9, 0.22);
}
.worso-cs__outcome::before {
	content: "★";
	position: absolute;
	left: 32px;
	top: 50%;
	transform: translateY(-50%);
	width: 40px;
	height: 40px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--worso-lime, #2dac2e);
	color: var(--worso-ink-dk, #10131e);
	border-radius: 50%;
	font-size: 20px;
	font-weight: 900;
}
.worso-cs__outcome-eyebrow {
	display: block;
	font-size: var(--worso-fs-xs, 12px);
	letter-spacing: 0.24em;
	text-transform: uppercase;
	font-weight: 700;
	color: rgba(255, 255, 255, 0.82);
	margin-bottom: 6px;
}
.worso-cs__outcome-text {
	margin: 0;
	font-size: clamp(20px, 2.4vw, var(--worso-fs-3xl, 24px));
	line-height: 1.45;
	font-weight: 700;
	color: var(--worso-white);
	letter-spacing: -0.005em;
}

/* compare grid */
.worso-cs__compare {
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: var(--worso-sp-5);
	margin: 0 0 32px;
}
.worso-cs__compare-block {
	position: relative;
	padding: 28px 28px 28px 32px;
	background: var(--worso-white);
	border: 1px solid var(--worso-border, #dde0e6);
	border-radius: var(--worso-radius, 16px);
	overflow: hidden;
}
.worso-cs__compare-block::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0;
	bottom: 0;
	width: 4px;
}
.worso-cs__compare-block--challenge {
	background: var(--worso-amber-bg, #FFFBE8);
	border-color: var(--worso-amber-bdr, #F5D96B);
}
.worso-cs__compare-block--challenge::before { background: var(--worso-red-soft, #E26B5D); }
.worso-cs__compare-block--solution {
	background: var(--worso-lime-bg, #eaf7e6);
	border-color: var(--worso-lime-bdr, #99e095);
}
.worso-cs__compare-block--solution::before { background: var(--worso-lime-dk, #127c09); }

.worso-cs__compare-head {
	display: flex;
	align-items: flex-start;
	gap: 14px;
	margin-bottom: 14px;
}
.worso-cs__compare-icon {
	flex: none;
	width: 36px;
	height: 36px;
	display: inline-flex;
	align-items: center;
	justify-content: center;
	background: var(--worso-white);
	border-radius: 50%;
	box-shadow: var(--worso-shadow-sm, 0 1px 2px rgba(16,19,30,0.04));
}
.worso-cs__compare-block--challenge .worso-cs__compare-icon { color: var(--worso-red-soft, #E26B5D); }
.worso-cs__compare-block--solution .worso-cs__compare-icon { color: var(--worso-lime-dk, #127c09); }

.worso-cs__compare-eyebrow {
	display: block;
	font-size: var(--worso-fs-2xs, 11px);
	letter-spacing: 0.16em;
	text-transform: uppercase;
	font-weight: 700;
	color: var(--worso-ink-muted, #6B7280);
	margin-bottom: 2px;
}
.worso-cs__compare-title {
	margin: 0;
	font-size: var(--worso-fs-xl, 18px);
	font-weight: 700;
	color: var(--worso-ink-dk, #10131e);
	letter-spacing: -0.005em;
}
.worso-cs__compare-text {
	margin: 0;
	font-size: var(--worso-fs-md, 15px);
	line-height: var(--worso-lh-base, 1.75);
	color: var(--worso-ink, #1e2130);
}

/* detail */
.worso-cs__detail {
	padding: 24px 28px;
	background: var(--worso-bg-soft, #F8FAFC);
	border: 1px solid var(--worso-border, #dde0e6);
	border-radius: var(--worso-radius, 16px);
}
.worso-cs__detail-title {
	margin: 0 0 14px;
	font-size: var(--worso-fs-2xs, 11px);
	letter-spacing: 0.18em;
	text-transform: uppercase;
	font-weight: 700;
	color: var(--worso-ink-muted, #6B7280);
}
.worso-cs__detail-body {
	color: var(--worso-ink, #1e2130);
	font-size: var(--worso-fs-md, 15px);
	line-height: var(--worso-lh-base, 1.75);
}
.worso-cs__detail-body p { margin: 0 0 12px; }
.worso-cs__detail-body p:last-child { margin: 0; }

/* ---------- Bottom CTA ---------- */
.worso-cs__cta {
	margin-top: 48px;
	background: linear-gradient(180deg, var(--worso-green-600) 0%, var(--worso-green-700) 100%);
	border-radius: var(--worso-radius-lg, 20px);
	overflow: hidden;
	color: var(--worso-white);
	box-shadow: 0 6px 18px rgba(18, 124, 9, 0.22);
}
.worso-cs__cta-inner {
	padding: 56px 56px;
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: var(--worso-sp-4);
	text-align: center;
}
.worso-cs__cta-title {
	margin: 0;
	font-size: clamp(22px, 2.6vw, var(--worso-fs-4xl, 28px));
	font-weight: 800;
	letter-spacing: -0.005em;
	color: var(--worso-white);
}
.worso-cs__cta-body {
	margin: 0;
	font-size: var(--worso-fs-lg, 16px);
	line-height: 1.65;
	color: rgba(255, 255, 255, 0.84);
	max-width: 560px;
}
.worso-cs__cta-actions {
	display: flex;
	flex-wrap: wrap;
	gap: 14px;
	justify-content: center;
	margin-top: 8px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
	.worso-cs__summary { padding: 28px 0; }
	.worso-cs__summary-stats {
		grid-template-columns: 1fr;
		gap: 14px;
		padding: 18px 22px;
	}
	.worso-cs__summary-stat {
		padding: 14px 0 0;
		border-left: 0;
		border-top: 1px solid var(--worso-border, #dde0e6);
	}
	.worso-cs__summary-stat:first-child {
		padding-top: 0;
		border-top: 0;
	}
	.worso-cs__article { padding: 36px 32px; }
	.worso-cs__compare { grid-template-columns: 1fr; }
	.worso-cs__cta-inner { padding: var(--worso-sp-8) var(--worso-sp-7); }
}

@media (max-width: 640px) {
	.worso-cs__summary { padding: 22px 0; }
	.worso-cs__summary-stats { padding: 16px 18px; }
	.worso-cs__index { padding: 10px 0; }
	.worso-cs__index-inner { gap: 12px; }
	.worso-cs__index-label { display: none; }
	.worso-cs__body { padding: 56px 0 64px; }
	.worso-cs__article {
		padding: 28px 22px;
		margin-bottom: 32px;
		border-radius: var(--worso-radius, 16px);
	}
	.worso-cs__article-head {
		padding-bottom: 22px;
		margin-bottom: 22px;
	}
	.worso-cs__outcome {
		padding: 24px 22px 24px 22px;
		text-align: left;
	}
	.worso-cs__outcome::before {
		position: relative;
		left: 0;
		top: 0;
		transform: none;
		margin: 0 0 12px;
		width: 32px;
		height: 32px;
		font-size: 16px;
	}
	.worso-cs__compare-block,
	.worso-cs__detail { padding: 20px; }
	.worso-cs__cta-inner { padding: 32px 22px; }
	.worso-cs__cta-actions .worso-btn { width: 100%; justify-content: center; }
}