/**
 * Global layout system: page skeleton, container, section, grid, columns,
 * and responsive visibility utilities. Every future page/component is
 * expected to compose these primitives rather than reinvent layout rules
 * locally. Breakpoint literals (30rem/48rem/64rem) mirror the reference
 * values in assets/css/tokens.css — see that file's header comment for
 * why they can't be consumed as custom properties inside @media.
 */

/* ---------- Page skeleton ---------- */

#page {
	display: flex;
	flex-direction: column;
	min-height: 100vh;
}

.site-content {
	flex: 1 0 auto;
}

.site-header {
	position: sticky;
	inset-block-start: 0;
	z-index: var(--z-sticky);
	display: flex;
	align-items: center;
	justify-content: space-between;
	flex-wrap: wrap;
	gap: var(--space-4);
	background-color: var(--color-background);
	border-block-end: 1px solid var(--color-border);
}

.site-header,
.site-footer {
	padding-inline: var(--space-6);
	padding-block: var(--space-4);
}

.site-main {
	padding-inline: var(--space-6);
	padding-block: var(--space-6);
}

.widget-area {
	padding-inline: var(--space-6);
}

/* ---------- Container ---------- */

.container {
	width: 100%;
	max-width: var(--container-wide);
	margin-inline: auto;
	padding-inline: var(--space-6);
}

.container--narrow {
	max-width: var(--container-content);
}

.container--full {
	max-width: none;
}

/* ---------- Section ---------- */

.section {
	padding-block: var(--space-12);
}

.section--sm {
	padding-block: var(--space-6);
}

.section--lg {
	padding-block: var(--space-20);
}

.section--alt {
	background-color: var(--color-background-alt);
}

/* ---------- Grid ---------- */

.grid {
	display: grid;
	gap: var(--space-6);
	grid-template-columns: 1fr;
}

.grid-cols-2 {
	grid-template-columns: repeat(2, 1fr);
}

.grid-cols-3 {
	grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
	grid-template-columns: repeat(4, 1fr);
}

.grid-auto {
	grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}

@media (max-width: 64rem) {
	.grid-cols-3,
	.grid-cols-4 {
		grid-template-columns: repeat(2, 1fr);
	}
}

@media (max-width: 48rem) {
	.grid-cols-2,
	.grid-cols-3,
	.grid-cols-4 {
		grid-template-columns: 1fr;
	}
}

/* ---------- Columns (flexible two-up layout) ---------- */

.columns {
	display: flex;
	flex-wrap: wrap;
	gap: var(--space-6);
}

.columns > .column {
	flex: 1 1 0;
	min-width: 0;
}

.columns > .column--fixed {
	flex: 0 0 auto;
}

@media (max-width: 48rem) {
	.columns {
		flex-direction: column;
	}
}

/* ---------- Responsive visibility utilities ---------- */

.u-hidden {
	display: none !important;
}

@media (max-width: 30rem) {
	.u-hidden-sm-down {
		display: none !important;
	}
}

@media (min-width: 30rem) {
	.u-hidden-sm-up {
		display: none !important;
	}
}

@media (max-width: 48rem) {
	.u-hidden-md-down {
		display: none !important;
	}
}

@media (min-width: 48rem) {
	.u-hidden-md-up {
		display: none !important;
	}
}

@media (max-width: 64rem) {
	.u-hidden-lg-down {
		display: none !important;
	}
}

@media (min-width: 64rem) {
	.u-hidden-lg-up {
		display: none !important;
	}
}