.section-card {
    @include card-style;
    padding: var(--small-card-padding);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);

    --separation: 15px;

    .section-term {
        font-size: 2.2rem;
        margin: 0;
        color: var(--card-text-color-main);
    }

    .section-description {
        font-weight: normal;
        color: var(--card-text-color-secondary);
        font-size: 1.6rem;
        margin: 0;
    }

    .section-details {
        flex-grow: 1;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .section-image {
        img {
            width: 60px;
            height: 60px;
            object-fit: cover;
        }
    }

    .section-count {
        color: var(--card-text-color-tertiary);
        font-size: 1.4rem;
        margin: 0;
        font-weight: bold;
        text-transform: uppercase;
    }
}

@property --left-edge-fade-size {
    syntax: "<length>";
    inherits: false;
    initial-value: 0px;
}

@property --right-edge-fade-size {
    syntax: "<length>";
    inherits: false;
    initial-value: 64px;
}

.subsection-list {
    --shadow-overlap-x: calc(var(--shadow-l2-blur) + 4px);
    --shadow-overlap-y: calc(var(--shadow-l2-blur) + var(--shadow-l2-y) + 4px);
    --edge-fade-size: 64px;
    --left-edge-fade-size: 0px;
    --right-edge-fade-size: var(--edge-fade-size);

    overflow-x: auto;

    /// Limit the horizontal overlap to the container padding to prevent page overflow on mobile.
    /// On desktop, it still allows the full shadow to be visible.
    --overlap-x: min(var(--shadow-overlap-x), var(--container-padding));

    /// These values are computed from the shadow of the article-list--tile (which uses shadow-l1 and shadow-l2)
    /// so that the shadow is not cut off, while staying within the viewport on small screens.
    /// Clamp both sides to prevent page-level horizontal overflow.
    margin-left: calc(var(--overlap-x) * -1);
    margin-right: calc(var(--overlap-x) * -1);
    margin-bottom: calc(var(--shadow-overlap-y) * -1);

    /// Smooth fade on both horizontal edges to avoid hard cuts where shadows are clamped.
    --subsection-mask-image: linear-gradient(
        to right,
        transparent 0%,
        rgb(0 0 0 / 0.06) calc(var(--left-edge-fade-size) * 0.12),
        rgb(0 0 0 / 0.2) calc(var(--left-edge-fade-size) * 0.3),
        rgb(0 0 0 / 0.45) calc(var(--left-edge-fade-size) * 0.52),
        rgb(0 0 0 / 0.72) calc(var(--left-edge-fade-size) * 0.76),
        black var(--left-edge-fade-size),
        black calc(100% - var(--right-edge-fade-size)),
        rgb(0 0 0 / 0.72) calc(100% - (var(--right-edge-fade-size) * 0.76)),
        rgb(0 0 0 / 0.45) calc(100% - (var(--right-edge-fade-size) * 0.52)),
        rgb(0 0 0 / 0.2) calc(100% - (var(--right-edge-fade-size) * 0.3)),
        rgb(0 0 0 / 0.06) calc(100% - (var(--right-edge-fade-size) * 0.12)),
        transparent 100%
    );
    -webkit-mask-image: var(--subsection-mask-image);
    mask-image: var(--subsection-mask-image);

    [dir="rtl"] & {
        margin-left: calc(var(--overlap-x) * -1);
        margin-right: calc(var(--overlap-x) * -1);
    }

    .article-list--tile {
        display: flex;
        padding: var(--spacing-xs) var(--overlap-x) var(--shadow-overlap-y) var(--overlap-x);
        width: max-content;
        gap: var(--spacing-lg);

        [dir="rtl"] & {
            padding: var(--spacing-xs) var(--overlap-x) var(--shadow-overlap-y) var(--overlap-x);
        }

        article {
            flex-shrink: 0;

            .article-title {
                margin: 0;
                font-size: 1.8rem;
            }

            .article-details {
                padding: var(--spacing-lg);
            }
        }
    }
}

// Only apply scroll-driven edge fades in browsers that support scroll timelines.
// Browsers without support (e.g. Firefox) fall back to the static right-edge fade
// defined by the explicit CSS variable declarations above.
@supports (animation-timeline: scroll(self inline)) {
    .subsection-list {
        animation: subsection-left-fade linear both, subsection-right-fade linear both;
        animation-timeline: scroll(self inline);
        animation-range: 1px 24px, 0% 100%;
        animation-timing-function: ease-out, linear;
    }
}

@keyframes subsection-left-fade {
    from {
        --left-edge-fade-size: 0px;
    }
    to {
        --left-edge-fade-size: var(--edge-fade-size);
    }
}

@keyframes subsection-right-fade {
    0%,
    92% {
        --right-edge-fade-size: var(--edge-fade-size);
    }
    100% {
        --right-edge-fade-size: 0px;
    }
}