/*
  Experiments page (experiments.html, js/experimentsPage.js): a wall of loops grouped by
  year, breaking out of the 730px column to the bleed-xl width. The detail card comes from
  work-views-card.css; the tokens it needs from work-views.css are repeated here because
  that file carries homepage-only layout.
*/

:root {
    --wv-tint: rgba(55, 44, 9, 0.06);
    --wv-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
    --exp-wide: min(1100px, calc(100vw - 2 * var(--header-frame-side)));
}

/* Let the year labels stick: core.css's overflow-x: hidden on html/body makes body a scroll
   container, which stops position: sticky. Same fix as the homepage (work-views.css). */
html,
body {
    overflow-x: clip;
    overflow-y: visible;
}

#experiments-container > .breadcrumb-nav:first-child {
    padding-top: var(--spacing-lg);
}

/* Breadcrumb, header and return link sit on the wall's frame, lined up with the loops
   (past the year gutter) rather than centred in the 730px column. Prose keeps its measure. */
@media (min-width: 769px) {
    #experiments-container > .breadcrumb-nav,
    .exp-head,
    #experiments-container > .subpage-return-home {
        width: var(--exp-wide);
        max-width: none;
        margin-left: auto;
        margin-right: auto;
        padding-left: calc(88px + var(--spacing-xl));
        padding-right: 0;
    }

    .exp-head > * {
        max-width: 680px;
    }
}

.exp-head {
    padding-top: var(--spacing-xl);
    margin-bottom: var(--spacing-3xl);
}

.exp-intro {
    font-size: var(--fs-body);
    line-height: var(--lh-body);
    font-variation-settings: 'YTLC' 500, 'wdth' 100;
    margin: 0 0 var(--spacing-xl);
}

/* ---- Filters ---- */

.exp-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.exp-filter {
    appearance: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    min-height: 40px;
    padding: 0 16px;
    border: 1px solid rgba(55, 44, 9, 0.2);
    border-radius: 999px;
    background: transparent;
    color: var(--text-color);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--fs-ui);
    cursor: pointer;
    transition: background-color 0.2s, color 0.2s, border-color 0.2s;
}

.exp-filter-count {
    font-family: var(--font-body);
    font-weight: 400;
    font-style: italic;
    opacity: 0.7;
}

.exp-filter[aria-pressed="true"] {
    background: var(--text-color);
    border-color: var(--text-color);
    color: var(--bg-color);
}

@media (hover: hover) and (pointer: fine) {
    .exp-filter[aria-pressed="false"]:hover {
        background: var(--wv-tint);
    }
}

.exp-filter:focus-visible {
    outline: 3px solid var(--highlight-yellow);
    outline-offset: 3px;
}

/* ---- Wall ---- */

.exp-wall {
    width: var(--exp-wide);
    margin: 0 auto var(--space-section);
    outline: none;
}

/* Years follow the homepage List view's index: a hairline over each year, and a small,
   quiet year label that rides down beside its loops (work-views-list.css .wv-index-year). */
.exp-year {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 0 var(--spacing-xl);
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(55, 44, 9, 0.1);
    margin-bottom: var(--spacing-2xl);
}

.exp-year-label {
    position: sticky;
    top: var(--spacing-xl);
    align-self: start;
    margin: 0;
    padding-top: 2px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--fs-ui);
    line-height: var(--lh-display);
    font-variant-numeric: tabular-nums;
    opacity: 0.45;
}


.exp-wall-grid {
    display: grid;
    /* Loops are ~288px; tiles stay near that so they never blow up past ~1.5x. */
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-2xl) var(--spacing-xl);
    margin: 0;
    padding: 0;
    list-style: none;
}

.exp-wall-item {
    position: relative;
    min-width: 0;
    max-width: 432px;
}

.exp-wall-open {
    appearance: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    background: none;
    color: inherit;
    font: inherit;
    text-align: left;
    cursor: zoom-in;
    -webkit-tap-highlight-color: transparent;
}

.exp-wall-open:focus-visible {
    outline: 3px solid var(--highlight-yellow);
    outline-offset: 4px;
    border-radius: 15px;
}

.exp-wall-media {
    position: relative;
    display: block;
    aspect-ratio: 1;
    border-radius: 15px;
    overflow: hidden;
    background: var(--wv-tint);
    transition: transform 0.35s var(--wv-ease), box-shadow 0.35s;
}

.exp-wall-media > img,
.exp-wall-media > video {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@media (hover: hover) and (pointer: fine) {
    .exp-wall-open:hover .exp-wall-media {
        transform: translateY(-3px);
        box-shadow: 0 14px 30px rgba(55, 44, 9, 0.18);
    }

    .exp-wall-open:hover .exp-wall-title {
        opacity: 0.7;
    }
}

.exp-wall-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.exp-wall-title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--fs-prose-h4);
    line-height: var(--lh-display);
}

.exp-wall-short {
    font-size: var(--fs-ui);
    line-height: var(--lh-body);
    font-variation-settings: 'YTLC' 500, 'wdth' 100;
}

.exp-wall-meta {
    font-style: italic;
    font-size: var(--fs-ui);
    line-height: var(--lh-display);
    opacity: 0.75;
}

/* Reduced motion: loops wait for a press. */
.exp-wall-play {
    position: absolute;
    top: 10px;
    right: 10px;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 0;
    border-radius: 50%;
    background: rgba(255, 253, 239, 0.92);
    color: var(--text-color);
    box-shadow: 0 2px 10px rgba(55, 44, 9, 0.2);
    cursor: pointer;
}

.exp-wall-play:focus-visible {
    outline: 3px solid var(--highlight-yellow);
    outline-offset: 2px;
}

.exp-empty {
    padding: var(--spacing-3xl) 0;
    text-align: center;
    font-size: var(--fs-body);
}

/* Tiles rise in as they first reach the screen (added only without reduced motion). */
.exp-wall--reveal .exp-wall-item {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.6s var(--wv-ease);
}

.exp-wall--reveal .exp-wall-item.is-in {
    opacity: 1;
    transform: none;
}

@media (max-width: 768px) {
    .exp-wall {
        width: auto;
        margin-left: var(--mobile-padding-horizontal);
        margin-right: var(--mobile-padding-horizontal);
    }

    .exp-head {
        padding: var(--spacing-md) var(--mobile-padding-horizontal) 0;
        margin-bottom: var(--spacing-2xl);
    }

    .exp-year {
        grid-template-columns: minmax(0, 1fr);
        gap: var(--spacing-sm);
    }

    .exp-year-label {
        position: static;
    }

    .exp-wall-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: var(--spacing-xl) var(--spacing-md);
    }

    .exp-wall-short {
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
}

@media (prefers-reduced-motion: reduce) {
    .exp-wall-media,
    .exp-filter {
        transition: none;
    }
}