/* =====================================================
   STEM Articles Plugin — Frontend Grid Styles
===================================================== */

:root {
    --sa-cream:  #f0ede6;
    --sa-dark:   #3D4321;
    --sa-mid:    #6b6b5a;
    --sa-accent: #3d4a2e;
}

/* ── Filter Bar ── */
.sa-filter-bar {
    margin-bottom: 48px;
}

/* Row 1 — ALL SUBJECTS */
.sa-filter-row-all {
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--sa-dark);
    padding-bottom: 10px;
    margin-bottom: 0;
}

/* Row 2 — Subject tabs */
.sa-filter-row-subjects {
    display: flex;
    flex-wrap: wrap;
    gap: 0 40px;
    align-items: center;
    padding: 10px 0;
    justify-content: flex-start;
    margin-left: 40px;
}

/* Filter items */
.sa-filter-item {
    font-size: 18px;
    text-transform: uppercase;
    cursor: pointer;
    color: #3D4321;
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 2px 0;
    transition: color .2s;
    user-select: none;
    white-space: nowrap;
    font-family: 'Albra Book Light', Georgia, serif;
    font-weight: 300;
}

.sa-filter-item:hover  { color: var(--sa-dark); }
.sa-filter-item.active { color: var(--sa-dark); }

/* Radio dot */
.sa-filter-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 1.5px solid currentColor;
    display: inline-block;
    flex-shrink: 0;
    transition: background .2s;
}

.sa-filter-item.active .sa-filter-dot {
    background: var(--sa-dark);
}

/* Subject icon sizing */
.sa-filter-item svg {
    width: auto;
    height: 18px;
    display: inline-block;
    vertical-align: middle;
    flex-shrink: 0;
}

/* ── Articles Grid ── */
.sa-articles-grid {
    display: grid;
    gap: 56px 24px;
}

.sa-cols-1 { grid-template-columns: 1fr; }
.sa-cols-2 { grid-template-columns: repeat(2, 1fr); }
.sa-cols-3 { grid-template-columns: repeat(3, 1fr); }
.sa-cols-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
    .sa-cols-3,
    .sa-cols-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
    .sa-cols-2,
    .sa-cols-3,
    .sa-cols-4 { grid-template-columns: 1fr; }
}

/* ── Article Card ── */
.sa-article-card {
    transition: opacity .3s;
}

.sa-article-card.hidden { display: none; }

.sa-card-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.sa-card-image-wrap {
    overflow: hidden;
    aspect-ratio: 4 / 3;
    line-height: 0;
    margin-bottom: 0;
}

.sa-card-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .7s cubic-bezier(.25, .46, .45, .94);
}

.sa-card-no-image {
    width: 100%;
    aspect-ratio: 4 / 3;
    background: #ddd;
}

.sa-article-card:hover .sa-card-image {
    transform: scale(1.04);
}

.sa-card-info {
    padding: 14px 0 0;
}

.sa-card-title {
    font-family: 'Albra Book Light', Georgia, serif;
    font-size: 34px;
    font-weight: 300;
    line-height: 40px;
    color: var(--sa-dark);
    margin: 0 0 8px;
    letter-spacing: 0;
}

.sa-card-read-on {
    font-family: 'Atlas Grotesk Regular', sans-serif;
    font-size: 12px;
    font-weight: 400;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--sa-dark);
    display: flex;
    align-items: center;
    gap: 6px;
}

.sa-read-on-arrow {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

/* ── No results ── */
.sa-no-articles {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 0;
    color: var(--sa-mid);
    font-size: 14px;
}

/* ── Subject Icon wrapper ── */
.sa-subject-icon {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    line-height: 0;
}

.sa-subject-icon svg {
    height: var(--sa-icon-px, 28px);
    width: auto;
    display: block;
    flex-shrink: 0;
}

.sa-filter-item svg {
    height: auto;
    width: auto;
}

/* Mobile inline grids — never shown */
.sa-mobile-subject-grid {
    display: none !important;
}

/* ── Filter Header toggle — desktop: hidden ── */
.sa-filter-header {
    display: none;
    font-family: 'Atlas Grotesk Regular', sans-serif;
    font-size: 11px;
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--sa-dark);
    padding-bottom: 10px;
    border-bottom: 1px solid var(--sa-dark);
    margin-bottom: 0;
    cursor: pointer;
    user-select: none;
    justify-content: space-between;
    align-items: center;
}

.sa-filter-header-arrow {
    display: inline-block;
    transition: transform 0.25s ease;
}

.sa-filter-bar.sa-filter-open .sa-filter-header-arrow {
    transform: rotate(180deg);
}

/* CLEAR — desktop: hidden */
.sa-filter-clear {
    display: none;
}

/* ── MOBILE ── */
@media (max-width: 768px) {

    .sa-filter-bar {
        margin-bottom: 32px;
    }

    /* Show toggle header */
    .sa-filter-header {
        display: flex;
    }

    /* Filter rows: collapsed by default */
    .sa-filter-row-all,
    .sa-filter-row-subjects {
        display: none;
        overflow: hidden;
    }

    /* Expanded state */
    .sa-filter-bar.sa-filter-open .sa-filter-row-all,
    .sa-filter-bar.sa-filter-open .sa-filter-row-subjects {
        display: flex;
        flex-direction: column;
        align-items: flex-start;
        flex-wrap: nowrap;
        gap: 0;
        margin-left: 0;
        padding: 0;
        border-bottom: none;
    }

    .sa-filter-item {
        width: 100%;
        padding: 10px 0;
        font-size: 14px;
        white-space: normal;
        gap: 10px;
    }

    .sa-filter-item .sa-subject-icon {
        margin-left: auto;
        width: 36px;
        justify-content: center;
    }

    .sa-filter-item .sa-subject-icon svg {
        height: 28px;
        width: 28px;
        max-width: 28px;
    }

    /* CLEAR visible */
    .sa-filter-clear {
        display: flex;
    }

    .sa-filter-clear::after {
        content: 'CLEAR';
    }

    .sa-card-title {
        font-size: 14px;
        line-height: 20px;
    }
}