/* Learn index — field notes / proof sheet. Not a card grid. */
body.pl-landing-learn {
    --pl-learn-ink: #0e0e0e;
    --pl-learn-muted: #6a6a6a;
    --pl-learn-line: #e4e4e4;
    background: #fff;
}

body.pl-landing-learn .pl-learn {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: calc(var(--pl-marketing-header-h, 72px) + 28px) clamp(20px, 5vw, 48px) clamp(48px, 7vh, 72px);
}

body.pl-landing-learn .pl-learn__sheet {
    position: relative;
    padding: clamp(28px, 4vw, 48px) clamp(20px, 3vw, 40px) clamp(20px, 3vw, 32px);
    border: 1px solid var(--pl-learn-line);
}

body.pl-landing-learn .pl-learn__crop {
    position: absolute;
    width: 14px;
    height: 14px;
    pointer-events: none;
}

body.pl-landing-learn .pl-learn__crop--tl {
    top: -1px;
    left: -1px;
    border-top: 1px solid var(--pl-learn-ink);
    border-left: 1px solid var(--pl-learn-ink);
}

body.pl-landing-learn .pl-learn__crop--tr {
    top: -1px;
    right: -1px;
    border-top: 1px solid var(--pl-learn-ink);
    border-right: 1px solid var(--pl-learn-ink);
}

body.pl-landing-learn .pl-learn__crop--bl {
    bottom: -1px;
    left: -1px;
    border-bottom: 1px solid var(--pl-learn-ink);
    border-left: 1px solid var(--pl-learn-ink);
}

body.pl-landing-learn .pl-learn__crop--br {
    bottom: -1px;
    right: -1px;
    border-bottom: 1px solid var(--pl-learn-ink);
    border-right: 1px solid var(--pl-learn-ink);
}

body.pl-landing-learn .pl-learn__mast {
    margin: 0 0 clamp(28px, 4vw, 40px);
}

body.pl-landing-learn .pl-learn__issue {
    margin: 0 0 10px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--pl-learn-muted);
}

body.pl-landing-learn .pl-learn__mast h1 {
    margin: 0;
    max-width: 14ch;
    font-size: clamp(40px, 7vw, 72px);
    font-weight: 400;
    letter-spacing: -0.05em;
    line-height: 0.95;
    color: var(--pl-learn-ink);
}

body.pl-landing-learn .pl-res-filter {
    max-width: none;
    margin: 0;
    padding: 0 0 8px;
    border-top: 0;
    gap: 0 4px;
}

body.pl-landing-learn .pl-res-filter-btn {
    position: relative;
    display: inline-block;
    margin: 0 22px 0 0;
    padding: 8px 0;
    border: 0;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

body.pl-landing-learn .pl-res-filter-btn:last-child {
    margin-right: 0;
}

body.pl-landing-learn .pl-res-filter-btn::after {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    bottom: 4px;
    width: 0;
    height: 0;
    border-bottom: 2px solid currentColor;
    transition: width 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

body.pl-landing-learn .pl-res-filter-btn:hover::after,
body.pl-landing-learn .pl-res-filter-btn.is-active::after {
    width: 100%;
}

body.pl-landing-learn .pl-res-filter-btn.is-active {
    border-bottom-color: transparent;
}

body.pl-landing-learn .pl-res-grid {
    display: block;
    max-width: none;
    margin: 0;
    padding: 0;
    counter-reset: learn;
}

body.pl-landing-learn .pl-res-tile.is-filtered-out {
    display: none;
}

body.pl-landing-learn .pl-res-tile:not(.is-filtered-out) {
    counter-increment: learn;
}

body.pl-landing-learn .pl-res-tile {
    display: grid;
    grid-template-columns: 3rem minmax(0, 1fr);
    grid-template-rows: auto auto;
    column-gap: 16px;
    row-gap: 4px;
    min-height: 0;
    margin: 0;
    padding: clamp(20px, 2.4vw, 28px) 0;
    border: 0;
    border-top: 1px solid var(--pl-learn-line);
    background: transparent;
    overflow: visible;
    isolation: auto;
}

body.pl-landing-learn .pl-res-tile::before {
    content: none;
}

body.pl-landing-learn .pl-res-tile:last-child {
    border-bottom: 1px solid var(--pl-learn-line);
}

body.pl-landing-learn .pl-res-tile:hover {
    border-color: var(--pl-learn-line);
}

body.pl-landing-learn .pl-learn__n {
    grid-row: 1 / span 2;
    align-self: start;
    padding-top: 6px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.08em;
    font-variant-numeric: tabular-nums;
    color: var(--pl-learn-muted);
}

body.pl-landing-learn .pl-learn__n::before {
    content: counter(learn, decimal-leading-zero);
}

body.pl-landing-learn .pl-learn__kicker {
    grid-column: 2;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--pl-learn-muted);
}

body.pl-landing-learn .pl-res-tile h2 {
    grid-column: 2;
    margin: 0;
    font-size: clamp(22px, 3.2vw, 36px);
    font-weight: 500;
    letter-spacing: -0.04em;
    line-height: 1.12;
    color: var(--pl-learn-ink);
}

body.pl-landing-learn .pl-res-tile:hover h2 {
    text-decoration: underline;
    text-underline-offset: 4px;
}

body.pl-landing-learn .pl-res-tile-tag,
body.pl-landing-learn .pl-res-tile-title,
body.pl-landing-learn .pl-res-tile-deck,
body.pl-landing-learn .pl-res-tile-meta {
    display: none;
}

@media (max-width: 640px) {
    body.pl-landing-learn .pl-res-filter {
        position: static;
        flex-wrap: wrap;
        overflow: visible;
        mask-image: none;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border-bottom: 0;
        background: transparent;
    }

    body.pl-landing-learn .pl-res-tile {
        grid-template-columns: 2.4rem minmax(0, 1fr);
    }

    body.pl-landing-learn .pl-res-tile h2 {
        font-size: 22px;
    }
}