/**
 * Section: Feature — Grid
 * RSD Design Language Wave 4 Primitive 3.
 * Companion to: pages/sections/feature-grid.php
 *
 * Grid of small feature tiles. 12 tile slots; empty tiles hide via :empty.
 *
 * @since 3.5.70 (RSD primitives band)
 */

[data-ssla-type="feature-grid"]{
    padding: var(--shell-section-padding-y-standard) 48px;
    background: var(--shell-surface-cream);
}

[data-ssla-type="feature-grid"][data-ssla-variant-surface="cream"]{ background: var(--shell-surface-cream); }
[data-ssla-type="feature-grid"][data-ssla-variant-surface="warm"]{ background: var(--shell-surface-warm); }
[data-ssla-type="feature-grid"][data-ssla-variant-surface="light"]{ background: var(--shell-surface-light); }
[data-ssla-type="feature-grid"][data-ssla-variant-surface="dark"]{ background: var(--shell-surface-dark); }

.ssla-feature-grid{
    max-width: var(--shell-content-max-width);
    margin: 0 auto;
}

/* Header block */
.ssla-feature-grid-header{
    text-align: center;
    margin-bottom: 64px;
}

.ssla-feature-grid-header > * + *{
    margin-top: 16px;
}

.ssla-feature-grid-header .ssla-h2{
    max-width: 800px;
    margin: 16px auto 0;
}

.ssla-feature-grid-header .ssla-lede{
    max-width: 620px;
    margin: 0 auto;
}

/* When section heading is empty (per spec), hide header block */
.ssla-feature-grid-header:has(.ssla-h2:empty):has(.ssla-eyebrow.is-plain:empty):has(.ssla-lede:empty){
    display: none;
}

/* Tiles grid */
.ssla-feature-grid-tiles{
    display: grid;
    gap: var(--shell-grid-gap-standard);
    grid-template-columns: repeat(3, 1fr);
}

[data-ssla-type="feature-grid"][data-ssla-variant-columns="2"] .ssla-feature-grid-tiles{
    grid-template-columns: repeat(2, 1fr);
}

[data-ssla-type="feature-grid"][data-ssla-variant-columns="3"] .ssla-feature-grid-tiles{
    grid-template-columns: repeat(3, 1fr);
}

[data-ssla-type="feature-grid"][data-ssla-variant-columns="4"] .ssla-feature-grid-tiles{
    grid-template-columns: repeat(4, 1fr);
}

/* Tile */
.ssla-tile{
    padding: 32px;
    background: transparent;
    position: relative;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

/* tile-style variants */
[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="bordered"] .ssla-tile{
    border: 1px solid var(--shell-hairline-strong);
    background: var(--shell-surface-light);
    box-shadow:
        var(--shell-shadow-lift-1),
        var(--shell-shadow-lift-2);
}

[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="bordered"] .ssla-tile:hover{
    border-color: var(--shell-accent);
    box-shadow:
        var(--shell-shadow-lift-1),
        var(--shell-shadow-lift-2),
        var(--shell-shadow-lift-3);
    transform: translateY(-2px);
}

/* Gold accent rule on top of bordered tiles — design language signature */
[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="bordered"] .ssla-tile::before{
    content: "";
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    height: 2px;
    background: var(--shell-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.3s ease;
}

[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="bordered"] .ssla-tile:hover::before{
    transform: scaleX(1);
}

[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="card"] .ssla-tile{
    background: var(--shell-surface-light);
    box-shadow:
        var(--shell-shadow-lift-1),
        var(--shell-shadow-lift-2),
        var(--shell-shadow-lift-3);
    border: 1px solid var(--shell-hairline);
}

[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="card"] .ssla-tile:hover{
    transform: translateY(-3px);
    border-color: var(--shell-accent);
}

[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="flat"] .ssla-tile{
    border: 0;
    background: transparent;
    box-shadow: none;
}

[data-ssla-type="feature-grid"][data-ssla-variant-tile-style="flat"] .ssla-tile:hover{
    background: var(--shell-accent-soft);
}

/* Dark-tone tile overrides */
[data-ssla-variant-tone="dark"][data-ssla-variant-tile-style="bordered"] .ssla-tile,
[data-ssla-variant-tone="dark"][data-ssla-variant-tile-style="card"] .ssla-tile{
    background: rgba(245, 240, 232, 0.04);
    border-color: var(--shell-hairline-on-dark);
    box-shadow: none;
}

[data-ssla-variant-tone="dark"][data-ssla-variant-tile-style="bordered"] .ssla-tile:hover,
[data-ssla-variant-tone="dark"][data-ssla-variant-tile-style="card"] .ssla-tile:hover{
    background: rgba(245, 240, 232, 0.07);
    border-color: var(--shell-accent);
    transform: translateY(-2px);
}

/* Hide empty tile slots (no heading authored) */
.ssla-tile:has(.ssla-tile-heading:empty){
    display: none;
}

/* Icon */
.ssla-tile-icon{
    width: 32px;
    height: 32px;
    color: var(--shell-accent);
    margin-bottom: 16px;
}

.ssla-tile-icon:empty{
    display: none;
}

/* Inline icon position — beside text */
[data-ssla-type="feature-grid"][data-ssla-variant-icon-position="inline"] .ssla-tile{
    display: grid;
    grid-template-columns: 32px 1fr;
    gap: 16px;
    align-items: start;
}

[data-ssla-type="feature-grid"][data-ssla-variant-icon-position="inline"] .ssla-tile-icon{
    margin-bottom: 0;
    grid-row: span 2;
}

/* Headings */
.ssla-tile-heading{
    font-family: var(--shell-font-family-heading);
    font-size: 20px;
    font-weight: 700;
    color: var(--shell-text-dark);
    line-height: 1.25;
    letter-spacing: -0.3px;
    margin: 0 0 12px;
}

[data-ssla-variant-tone="dark"] .ssla-tile-heading{
    color: var(--shell-text-on-dark);
}

.ssla-tile-lede{
    font-size: 15px;
    color: var(--shell-text-body);
    line-height: 1.55;
    margin: 0;
}

[data-ssla-variant-tone="dark"] .ssla-tile-lede{
    color: var(--shell-text-on-dark-muted);
}

/* Tile link */
.ssla-tile-link{
    display: inline-block;
    margin-top: 12px;
    color: var(--shell-accent-strong);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
}

.ssla-tile-link:hover{
    text-decoration: underline;
}

.ssla-tile-link:empty{
    display: none;
}

[data-ssla-variant-tone="dark"] .ssla-tile-link{
    color: var(--shell-accent);
}

@media (max-width: 1023px) {
    [data-ssla-type="feature-grid"][data-ssla-variant-columns="4"] .ssla-feature-grid-tiles{
        grid-template-columns: repeat(2, 1fr);
    }

    [data-ssla-type="feature-grid"][data-ssla-variant-columns="3"] .ssla-feature-grid-tiles{
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 639px) {
    [data-ssla-type="feature-grid"]{
        padding: 64px 24px;
    }

    [data-ssla-type="feature-grid"] .ssla-feature-grid-tiles{
        grid-template-columns: 1fr;
    }
}