/* Random Art gallery (mathematical_art.html): preview grid, the list of every piece, and the
   "More mathematical art" links. Follows Bootstrap's theme variables; previews keep their own
   backgrounds. */

.gallery-page { max-width: 76rem; margin-inline: auto; padding-block: 0.5rem 3rem; }
.gallery-head { max-width: 46rem; margin-bottom: 1.5rem; }
.gallery-eyebrow { font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--bs-secondary-color); margin-bottom: 0.2rem; }
.gallery-head h1 { font-size: clamp(1.8rem, 4vw, 2.5rem); font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.5rem; }
.gallery-head p:last-child { color: var(--bs-secondary-color); margin: 0; }
.gallery-page h2 { font-size: 1.1rem; font-weight: 650; margin: 2.5rem 0 0.75rem; }

/* ---------- preview grid ---------- */
.art-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(14.5rem, 1fr)); gap: 1.25rem; }
.art-card {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--bs-border-color);
    border-radius: 0.9rem;
    overflow: hidden;
    color: inherit;
    text-decoration: none;
    background: var(--bs-body-bg);
    transition: border-color 0.15s, transform 0.15s;
}
.art-card:hover, .art-card:focus-visible { border-color: var(--bs-emphasis-color); transform: translateY(-2px); color: inherit; }
.art-card-img { display: block; aspect-ratio: 1; border-bottom: 1px solid var(--bs-border-color); background: #fff; }
.art-card-img img { display: block; width: 100%; height: 100%; object-fit: cover; }
.art-card-body { display: flex; flex-direction: column; gap: 0.2rem; padding: 0.8rem 0.95rem 1rem; }
.art-card-meta { display: flex; align-items: center; gap: 0.4rem; font-size: 0.75rem; color: var(--bs-secondary-color); font-variant-numeric: tabular-nums; }
.art-card-name { font-size: 1.1rem; font-weight: 650; line-height: 1.25; }
.art-card-blurb { font-size: 0.85rem; color: var(--bs-secondary-color); line-height: 1.4; }
.art-badge {
    display: inline-block;
    padding: 0.05rem 0.45rem;
    border-radius: 999px;
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    background: var(--bs-emphasis-color);
    color: var(--bs-body-bg);
    vertical-align: 0.1em;
}
/* Phones: two previews per row */
@media (max-width: 575.98px) {
    .art-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0.75rem; }
    .art-card-body { padding: 0.6rem 0.7rem 0.75rem; }
    .art-card-name { font-size: 0.98rem; }
    .art-card-blurb { font-size: 0.78rem; }
}
@media (prefers-reduced-motion: reduce) { .art-card { transition: none; } .art-card:hover { transform: none; } }

/* ---------- the list ---------- */
.art-list-wrap { overflow-x: auto; border: 1px solid var(--bs-border-color); border-radius: 0.75rem; }
.art-list { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.art-list th { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--bs-secondary-color); background: var(--bs-tertiary-bg); }
.art-list th, .art-list td { padding: 0.55rem 0.9rem; text-align: left; border-bottom: 1px solid var(--bs-border-color); vertical-align: top; }
.art-list tr:last-child td { border-bottom: 0; }
.art-list a { font-weight: 600; text-decoration: none; }
.art-list a:hover { text-decoration: underline; }
.art-list-no, .art-list-date { white-space: nowrap; color: var(--bs-secondary-color); font-variant-numeric: tabular-nums; }
.art-list-blurb { color: var(--bs-secondary-color); min-width: 16rem; }

/* ---------- more mathematical art ---------- */
.gallery-more { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.gallery-more a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.35rem 0.9rem;
    border: 1px solid var(--bs-border-color);
    border-radius: 999px;
    font-size: 0.875rem;
    text-decoration: none;
    color: var(--bs-body-color);
}
.gallery-more a:hover, .gallery-more a:focus-visible { border-color: var(--bs-emphasis-color); }
.gallery-more a:has(img) { padding-left: 0.3rem; }
.gallery-more img { width: 1.75rem; height: 1.75rem; border-radius: 50%; object-fit: cover; }