/* ==========================================================================
   Digital ROI — Blog Archive  (prefix: blf-)
   Design matches existing site pages (cl-, ab-, si- etc.)
   ========================================================================== */

:root {
	--blf-dark:   #0d0d0d;
	--blf-white:  #ffffff;
	--blf-ink:    #111111;
	--blf-body:   #f5f5f0;
	--blf-accent: #ed3d0e;
	--blf-muted:  #666666;      /* body text on the white section */
	--blf-hero-muted: rgba(255,255,255,.6); /* lead text on the dark hero */
	--blf-border: rgba(0,0,0,.1);
	--blf-radius: 12px;
}

.blf-container {
	max-width: 1200px;
	margin: 0 auto;
	padding: 0 clamp(20px, 4vw, 60px);
}

/* ═══ HERO ══════════════════════════════════════════════════════════ */
.blf-hero {
	background: var(--blf-dark);
	padding: clamp(100px, 12vw, 160px) 0 clamp(64px, 8vw, 96px);
}
.blf-hero__label {
	font-size: 11px;
	font-weight: 700;
	letter-spacing: .14em;
	text-transform: uppercase;
	color: var(--blf-accent);
	margin: 0 0 24px;
}
.blf-hero__h1 {
	font-size: clamp(48px, 7.5vw, 96px) !important;
	font-weight: 800 !important;
	line-height: 1.0 !important;
	letter-spacing: -0.03em !important;
	color: #fff !important;
	margin: 0 0 28px !important;
	text-transform: none !important;
}
.blf-hero__h1 em { font-style: normal; color: var(--blf-accent); }
.blf-hero__lead {
	font-size: clamp(16px, 1.7vw, 19px);
	color: var(--blf-hero-muted);
	line-height: 1.7;
	max-width: 600px;
	margin: 0;
}

/* ═══ SECTION ═══════════════════════════════════════════════════════ */
.blf-section {
	background: var(--blf-white);
	padding: clamp(64px, 8vw, 96px) 0 clamp(80px, 10vw, 120px);
}

/* ── Filter tabs ─────────────────────────────────────────────────── */
.blf-filters {
	display: flex;
	gap: 8px;
	flex-wrap: wrap;
	margin-bottom: 48px;
}
.blf-filter {
	background: transparent;
	border: 1px solid var(--blf-border);
	color: #333;
	font-size: 11px;
	font-weight: 700;
	letter-spacing: .14em;
	text-transform: uppercase;
	padding: 9px 20px;
	border-radius: 100px;
	cursor: pointer;
	transition: background .2s, border-color .2s, color .2s;
	line-height: 1;
}
.blf-filter:hover {
	border-color: var(--blf-accent);
	color: var(--blf-accent);
}
.blf-filter.active {
	background: var(--blf-accent);
	border-color: var(--blf-accent);
	color: #fff;
}

/* ── Grid ────────────────────────────────────────────────────────── */
.blf-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 24px;
	position: relative;
}

/* ── Card ────────────────────────────────────────────────────────── */
.blf-card {
	background: var(--blf-body);
	border: 1px solid var(--blf-border);
	border-radius: var(--blf-radius);
	overflow: hidden;
	display: flex;
	flex-direction: column;
	transition: border-color .2s, transform .2s, box-shadow .2s;
	will-change: transform, opacity;
}
.blf-card:hover {
	border-color: rgba(0,0,0,.25);
	box-shadow: 0 12px 28px rgba(0,0,0,.08);
	transform: translateY(-3px);
}
.blf-card--hidden { display: none; }

/* Thumbnail */
.blf-card__thumb {
	display: block;
	width: 100%;
	aspect-ratio: 16 / 9;
	overflow: hidden;
	background: #111;
}
.blf-card__img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	display: block;
	transition: transform .4s ease;
}
.blf-card:hover .blf-card__img { transform: scale(1.05); }

.blf-card__thumb-placeholder {
	width: 100%;
	aspect-ratio: 16 / 9;
	display: flex;
	align-items: center;
	justify-content: center;
	background: #ece9e2;
}
.blf-card__thumb-placeholder svg { width: 56px; height: auto; opacity: .5; }

/* Body */
.blf-card__body {
	padding: 24px;
	display: flex;
	flex-direction: column;
	flex: 1;
	gap: 10px;
}
.blf-card__tag {
	font-size: 10px;
	font-weight: 700;
	letter-spacing: .14em;
	text-transform: uppercase;
	color: var(--blf-accent);
}
.blf-card__title {
	font-size: clamp(15px, 1.3vw, 18px) !important;
	font-weight: 700 !important;
	line-height: 1.35 !important;
	letter-spacing: -0.01em !important;
	color: var(--blf-ink) !important;
	margin: 0 !important;
}
.blf-card__title a {
	color: inherit;
	text-decoration: none;
	transition: color .2s;
}
.blf-card__title a:hover { color: var(--blf-accent); }

.blf-card__excerpt {
	font-size: 14px;
	color: var(--blf-muted);
	line-height: 1.65;
	margin: 0;
	flex: 1;
}
.blf-card__foot {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding-top: 16px;
	border-top: 1px solid var(--blf-border);
	margin-top: auto;
}
.blf-card__date {
	font-size: 11px;
	font-weight: 500;
	color: var(--blf-muted);
}
.blf-card__read {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	font-size: 11px;
	font-weight: 700;
	letter-spacing: .1em;
	text-transform: uppercase;
	color: var(--blf-accent);
	text-decoration: none;
	transition: gap .2s;
}
.blf-card__read:hover { gap: 10px; }

/* ── Empty state ─────────────────────────────────────────────────── */
.blf-empty {
	text-align: center;
	color: var(--blf-muted);
	font-size: 16px;
	padding: 80px 0;
}

/* ═══ CTA STRIP ═════════════════════════════════════════════════════ */
.blf-cta {
	background: var(--blf-accent);
	padding: clamp(48px, 6vw, 80px) 0;
}
.blf-cta__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 32px;
	flex-wrap: wrap;
}
.blf-cta__label { display: none; }
.blf-cta__h2 {
	font-size: clamp(20px, 2.5vw, 30px) !important;
	font-weight: 800 !important;
	color: #fff !important;
	letter-spacing: -0.02em !important;
	line-height: 1.2 !important;
	margin: 0 !important;
	text-transform: none !important;
}
.blf-cta__btn {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	background: #fff;
	color: var(--blf-accent);
	font-size: 12px;
	font-weight: 700;
	letter-spacing: .1em;
	text-transform: uppercase;
	text-decoration: none;
	padding: 16px 28px;
	border-radius: 6px;
	white-space: nowrap;
	transition: opacity .2s, gap .2s;
}
.blf-cta__btn:hover { opacity: .9; gap: 14px; }

/* ═══ RESPONSIVE ═════════════════════════════════════════════════════ */
@media (max-width: 900px) {
	.blf-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 580px) {
	.blf-grid { grid-template-columns: 1fr; }
	.blf-cta__inner { flex-direction: column; align-items: flex-start; }
}