/* Volume tiers + research stacks */
.pbc-volume,
.pbc-stacks {
	margin: 1.25rem 0 1.5rem;
	padding: 1rem 1.1rem;
	border: 1px solid var(--bpw-line, #e2eaf6);
	border-radius: var(--bpw-radius-md, 14px);
	background: linear-gradient(180deg, #fff 0%, #f4faf8 100%);
}

.pbc-volume__head,
.pbc-stacks__head {
	margin: 0 0 0.75rem;
	font-weight: 600;
	font-size: 0.95rem;
	color: var(--bpw-ink, #0a1f1c);
}

.pbc-volume__head small,
.pbc-stacks__head small {
	font-weight: 400;
	color: var(--bpw-muted, #5f6c7b);
}

.pbc-volume__row {
	display: grid;
	grid-template-columns: repeat(4, minmax(0, 1fr));
	gap: 0.55rem;
}

.pbc-volume__tile {
	position: relative;
	display: flex;
	flex-direction: column;
	gap: 0.2rem;
	padding: 0.7rem 0.55rem;
	border: 1px solid #cfe3dc;
	border-radius: 12px;
	background: #fff;
	cursor: pointer;
	text-align: left;
	transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

.pbc-volume__tile.is-on,
.pbc-volume__tile:hover {
	border-color: var(--bpw-accent, #0f766e);
	box-shadow: 0 0 0 2px rgba(15, 118, 110, 0.12);
}

.pbc-volume__flag {
	position: absolute;
	top: -0.45rem;
	right: 0.35rem;
	font-size: 0.62rem;
	font-weight: 700;
	letter-spacing: 0.02em;
	text-transform: uppercase;
	padding: 0.12rem 0.35rem;
	border-radius: 999px;
	background: #d9f0ea;
	color: #0f766e;
}

.pbc-volume__flag--best {
	background: #0f766e;
	color: #fff;
}

.pbc-volume__qty {
	font-weight: 600;
	font-size: 0.88rem;
}

.pbc-volume__per {
	font-size: 0.82rem;
	color: var(--bpw-ink, #0a1f1c);
}

.pbc-volume__per span {
	color: var(--bpw-muted, #5f6c7b);
	font-size: 0.75rem;
}

.pbc-volume__save {
	font-size: 0.75rem;
	font-weight: 600;
	color: #0f766e;
}

.pbc-stacks__card {
	padding: 0.85rem 0;
	border-top: 1px solid #e2eaf6;
}

.pbc-stacks__card:first-of-type {
	border-top: 0;
	padding-top: 0;
}

.pbc-stacks__name {
	display: block;
	margin-bottom: 0.25rem;
}

.pbc-stacks__tag {
	margin: 0 0 0.55rem;
	font-size: 0.88rem;
	color: var(--bpw-muted, #5f6c7b);
}

.pbc-stacks__chips {
	display: flex;
	flex-wrap: wrap;
	gap: 0.35rem;
	margin-bottom: 0.55rem;
}

.pbc-stacks__chip {
	font-size: 0.75rem;
	padding: 0.2rem 0.5rem;
	border-radius: 999px;
	background: #eef7f4;
	color: #0a1f1c;
}

.pbc-stacks__price {
	margin: 0 0 0.65rem;
}

.pbc-stacks__price del {
	opacity: 0.55;
	margin-right: 0.35rem;
}

.pbc-stacks__save {
	margin-left: 0.35rem;
	font-size: 0.8rem;
	font-weight: 600;
	color: #0f766e;
}

.pbc-stack-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	gap: 1.25rem;
	margin: 1.5rem 0 2rem;
}

.pbc-stack-card {
	display: flex;
	flex-direction: column;
	border: 1px solid #d7e7e2;
	border-radius: 16px;
	overflow: hidden;
	background: #fff;
	box-shadow: 0 10px 30px rgba(10, 31, 28, 0.06);
}

.pbc-stack-card__media {
	aspect-ratio: 5 / 4;
	background: linear-gradient(160deg, #e8f5f1, #f7faf9);
	display: grid;
	place-items: center;
}

.pbc-stack-card__media img {
	max-width: 70%;
	height: auto;
}

.pbc-stack-card__body {
	padding: 1.1rem 1.15rem 1.25rem;
}

.pbc-stack-card__body h3 {
	margin: 0 0 0.4rem;
	font-size: 1.1rem;
}

.pbc-stack-card__tag {
	margin: 0 0 0.7rem;
	color: var(--bpw-muted, #5f6c7b);
	font-size: 0.92rem;
}

.pbc-stack-card__items {
	margin: 0 0 0.85rem;
	padding-left: 1.1rem;
	font-size: 0.9rem;
}

.pbc-stack-card__pricing {
	margin: 0 0 0.85rem;
}

.pbc-stack-card__pricing del {
	opacity: 0.55;
	margin-right: 0.35rem;
}

.pbc-cart-note {
	margin: 0 0 1rem;
	padding: 0.85rem 1rem;
	border-radius: 12px;
	background: #eef7f4;
	border: 1px solid #cfe3dc;
	font-size: 0.92rem;
}

.pbc-stacks-hero {
	padding: 3.5rem 0 2rem;
	background:
		radial-gradient(circle at 18% 20%, rgba(15, 118, 110, 0.18), transparent 42%),
		radial-gradient(circle at 82% 10%, rgba(196, 138, 46, 0.12), transparent 40%),
		linear-gradient(180deg, #0a1f1c 0%, #12352f 100%);
	color: #f5faf8;
}

.pbc-stacks-hero h1 {
	margin: 0 0 0.75rem;
	font-size: clamp(1.8rem, 3vw, 2.6rem);
	max-width: 16ch;
}

.pbc-stacks-hero p {
	max-width: 62ch;
	opacity: 0.9;
	line-height: 1.65;
}

.pbc-stacks-page .bpw-prose {
	max-width: 78ch;
}

@media (max-width: 800px) {
	.pbc-volume__row {
		grid-template-columns: repeat(2, minmax(0, 1fr));
	}
}