/**
 * Страница «Используемые материалы».
 * Острова без backdrop-filter — дешевле при прокрутке длинной страницы.
 */

body.algorithm-materials-page {
	background-color: #fff;
}

.materials-page {
	padding-bottom: clamp(32px, 4vw, 48px);
}

.materials-page-section {
	margin-top: clamp(40px, 5vw, 64px);
}

.materials-card {
	content-visibility: auto;
	contain-intrinsic-size: auto 520px;
}

.materials-page > .materials-intro.materials-page-section {
	margin-top: 0;
}

body.algorithm-materials-page .site-footer {
	margin-top: clamp(32px, 4vw, 48px);
}

body.algorithm-materials-page .home-section-title {
	margin: 0;
	font-family: var(--font-heading);
	font-weight: 600;
	font-size: clamp(28px, 4vw, 40px);
	line-height: 1.2;
	letter-spacing: -0.02em;
	color: var(--grafit-black);
}

/* Island shells — solid surface, без blur (perf при скролле) */
.materials-intro__shell,
.materials-card__shell {
	border-radius: var(--radius-lg);
	border: 1px solid rgba(0, 0, 0, 0.06);
	background: var(--white-bg);
	box-shadow: 0 8px 28px rgba(0, 0, 0, 0.06);
	padding: clamp(20px, 2.5vw, 32px);
	box-sizing: border-box;
}

/* Intro */
.materials-intro__title {
	margin-bottom: clamp(12px, 1.5vw, 18px);
	text-align: center;
}

.materials-intro__text {
	margin: 0;
	max-width: min(920px, 100%);
	margin-inline: auto;
	font-family: var(--font-family);
	font-weight: 400;
	font-size: clamp(15px, 1.5vw, 17px);
	line-height: 1.55;
	color: var(--grafit-grey);
	text-align: center;
}

/* Material card */
.materials-card__shell {
	display: grid;
	grid-template-columns: minmax(150px, 28%) minmax(0, 1fr) minmax(120px, 22%);
	gap: clamp(16px, 2vw, 28px);
	align-items: start;
}

.materials-card__visual {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 0;
}

.materials-card__visual img {
	display: block;
	width: 100%;
	max-width: min(360px, 100%);
	height: auto;
	object-fit: contain;
	border-radius: var(--radius-md);
}

.materials-card__title {
	margin-bottom: clamp(8px, 1vw, 12px);
	font-size: clamp(22px, 3vw, 32px);
}

body.algorithm-materials-page .materials-card__title {
	font-family: var(--font-family);
	font-weight: 500;
	font-synthesis: none;
	letter-spacing: -0.01em;
	line-height: 1.25;
}

.materials-card__subtitle {
	margin: 0 0 clamp(12px, 1.5vw, 16px);
	font-family: var(--font-family);
	font-weight: 600;
	font-size: clamp(14px, 1.4vw, 18px);
	line-height: 1.35;
	color: var(--grafit-black);
}

.materials-card__text {
	margin: 0 0 clamp(16px, 2vw, 22px);
	font-family: var(--font-family);
	font-weight: 400;
	font-size: clamp(14px, 1.4vw, 16px);
	line-height: 1.55;
	color: var(--grafit-grey);
}

.materials-card__benefits-title {
	margin: 0 0 clamp(10px, 1.2vw, 14px);
	font-family: var(--font-family);
	font-weight: 600;
	font-size: clamp(14px, 1.4vw, 18px);
	line-height: 1.3;
	color: var(--grafit-black);
}

.materials-card__benefits {
	margin: 0;
	padding: 0;
	list-style: none;
	display: grid;
	gap: clamp(8px, 1vw, 10px);
}

.materials-card__benefits li {
	position: relative;
	padding-left: 22px;
	font-family: var(--font-family);
	font-weight: 500;
	font-size: clamp(13px, 1.3vw, 15px);
	line-height: 1.45;
	color: var(--grafit-grey);
}

.materials-card__benefits li::before {
	content: "";
	position: absolute;
	left: 0;
	top: 0.45em;
	width: 11px;
	height: 11px;
	border-radius: 2px;
	background: var(--orange);
}

/* Swatches */
.materials-card__swatches {
	display: flex;
	flex-wrap: wrap;
	gap: 10px;
	justify-content: center;
	align-content: flex-start;
}

.materials-card__swatch {
	width: clamp(68px, 7vw, 84px);
	height: clamp(68px, 7vw, 84px);
	border-radius: var(--radius-md);
	border: 1px solid var(--glass-border);
	background: #fff;
	overflow: hidden;
	display: flex;
	align-items: center;
	justify-content: center;
	cursor: default;
	outline: none;
}

.materials-card__swatch img {
	display: block;
	width: auto;
	height: auto;
	max-width: calc(100% - 10px);
	max-height: calc(100% - 10px);
	object-fit: contain;
}

@media (hover: hover) and (pointer: fine) {
	.materials-card__swatch {
		transition: transform var(--transition-fast), border-color var(--transition-fast);
	}

	.materials-card__swatch:hover,
	.materials-card__swatch:focus-within {
		transform: translateY(-4px);
		border-color: var(--orange);
	}
}

.materials-card__swatch:focus-visible {
	border-color: var(--orange);
	box-shadow: 0 0 0 2px var(--orange);
}

/* Responsive */
@media (max-width: 1100px) {
	.materials-card__shell {
		grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
		grid-template-areas:
			"visual content"
			"swatches swatches";
	}

	.materials-card__visual {
		grid-area: visual;
	}

	.materials-card__content {
		grid-area: content;
	}

	.materials-card__swatches {
		grid-area: swatches;
		justify-content: flex-start;
	}

	.materials-card--no-swatches .materials-card__shell {
		grid-template-areas: "visual content";
	}
}

@media (max-width: 767px) {
	.materials-card__shell {
		grid-template-columns: 1fr;
		grid-template-areas:
			"visual"
			"content"
			"swatches";
	}

	.materials-card__visual img {
		max-width: min(280px, 100%);
		margin-inline: auto;
	}

	.materials-card__title {
		font-size: 24px;
	}

	.materials-intro__title {
		font-size: 24px;
	}

	.materials-card {
		contain-intrinsic-size: auto 640px;
	}
}

@media (prefers-reduced-motion: reduce) {
	.materials-card__swatch {
		transition: none;
	}

	.materials-card__swatch:hover,
	.materials-card__swatch:focus-within {
		transform: none;
	}
}