.item-row.is-expanded {
    background: #f6f6f6;
    box-shadow: inset 2px 0 var(--accent);
}

.row-expand {
    display: inline-grid;
    width: 32px;
    height: 32px;
    padding: 0;
    place-items: center;
    background: transparent;
}

.expand-chevron {
    display: block;
    font-size: 18px;
    line-height: 1;
    transition: transform .22s var(--spring);
}

.item-row.is-expanded .expand-chevron {
    transform: rotate(180deg);
}

.item-details {
    grid-column: 1 / -1;
    display: grid;
    grid-template-rows: 0fr;
    opacity: 0;
    transition:
        grid-template-rows .22s var(--spring),
        opacity .16s ease;
}

.item-details-inner {
    min-height: 0;
    overflow: hidden;
}

.item-details-content {
    display: grid;
    gap: 16px;
    padding: 16px 0 2px;
    border-top: 1px solid var(--line);
    transform: translateY(-6px);
    transition: transform .22s var(--spring);
}

.item-row.is-expanded .item-details {
    grid-template-rows: 1fr;
    opacity: 1;
}

.item-row.is-expanded .item-details-content {
    transform: translateY(0);
}

.item-detail-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.item-detail-section {
    min-width: 0;
    padding: 0 14px;
    border-left: 1px solid var(--line);
}

.item-detail-section:first-child {
    padding-left: 0;
    border-left: 0;
}

.item-detail-section h3,
.item-detail-section p,
.expanded-comfy h3 {
    margin: 0;
}

.item-detail-section h3,
.expanded-comfy h3,
.item-facts dt {
    color: var(--faint);
    font-family: "Geist Mono", "JetBrains Mono", Consolas, monospace;
    font-size: 10px;
}

.item-detail-section p,
.item-facts dd {
    color: var(--muted);
    font-size: 12px;
    line-height: 1.55;
    overflow-wrap: anywhere;
}

.item-detail-section p,
.item-detail-section .tag-list {
    margin-top: 7px;
}

.detail-source-link {
    display: inline-flex;
    margin-top: 8px;
    color: var(--text);
    font-size: 12px;
    font-weight: 700;
    text-underline-offset: 3px;
}

.expanded-comfy {
    display: grid;
    gap: 10px;
    padding-top: 14px;
    border-top: 1px solid var(--line);
}

.item-facts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
    margin: 0;
}

.item-facts div {
    min-width: 0;
}

.item-facts dt,
.item-facts dd {
    margin: 0;
}

.item-facts dd {
    margin-top: 4px;
}

@media (max-width: 860px) {
    .item-detail-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        row-gap: 16px;
    }

    .item-detail-section:nth-child(3) {
        padding-left: 0;
        border-left: 0;
    }
}

@media (max-width: 520px) {
    .item-detail-grid,
    .item-facts {
        grid-template-columns: minmax(0, 1fr);
    }

    .item-detail-section {
        padding: 14px 0 0;
        border-top: 1px solid var(--line);
        border-left: 0;
    }

    .item-detail-section:first-child {
        padding-top: 0;
        border-top: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .item-details,
    .item-details-content,
    .expand-chevron {
        transition: none;
    }
}