.card-container:has(.ui-side-panel) {
    position: relative;
}

/* Opt-in host for panels outside a card. */
.ui-side-panel-host {
    position: relative;
}

/* ── Scrim ──────────────────────────────────────────
 */

.ui-side-panel-scrim {
    position: absolute;
    inset: 0;
    border-radius: 5px;
    background-color: rgba(0, 0, 0, 0.45);
    z-index: 10000;
    animation: ui-side-panel-scrim-in 0.18s ease-out;
}

/* ── Panel ──────────────────────────────────────── */

.ui-side-panel {
    position: absolute;
    top: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    background-color: var(--ui-surface, #fff);
    border-radius: 5px;
    z-index: 10001;
    overflow: hidden; 
    outline: none;
}

.ui-side-panel--right {
    right: 0;
    border-left: 1px solid var(--ui-border, rgba(0, 0, 0, 0.12));
    box-shadow: -0.75rem 0 2rem rgba(0, 0, 0, 0.28);
    animation: ui-side-panel-in-right 0.2s ease-out;
}

.ui-side-panel--left {
    left: 0;
    border-right: 1px solid var(--ui-border, rgba(0, 0, 0, 0.12));
    box-shadow: 0.75rem 0 2rem rgba(0, 0, 0, 0.28);
    animation: ui-side-panel-in-left 0.2s ease-out;
}

@keyframes ui-side-panel-in-right {
    from {
        transform: translateX(4%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes ui-side-panel-in-left {
    from {
        transform: translateX(-4%);
        opacity: 0;
    }

    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes ui-side-panel-scrim-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@media (max-width: 767px) {
    .ui-side-panel,
    .ui-side-panel-scrim {
        border-radius: 0;
    }
}

@media (prefers-reduced-motion: reduce) {
    .ui-side-panel,
    .ui-side-panel-scrim {
        animation: none;
    }
}

.ui-side-panel-resize-handle {
    position: absolute;
    top: 0;
    width: 6px;
    height: 100%;
    cursor: col-resize;
    z-index: 1;
    background: transparent;
    transition: background-color 0.15s ease;
}

.ui-side-panel--right .ui-side-panel-resize-handle {
    left: 0;
}

.ui-side-panel--left .ui-side-panel-resize-handle {
    right: 0;
}

.ui-side-panel-resize-handle:hover,
.ui-side-panel-resize-handle.is-resizing {
    background-color: var(--ui-accent, #185FA5);
    opacity: 0.35;
}

/* ── Header ─────────────────────────────────────── */

.ui-side-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--ui-space-3, 0.75rem);
    padding: var(--ui-space-2, 0.5rem) var(--ui-space-4, 1rem);
    background-color: var(--ui-surface-subtle, #f5f5f3);
    border-bottom: 1px solid var(--ui-border, #e9ecef);
    flex-shrink: 0;
}

.ui-side-panel-heading {
    display: flex;
    align-items: baseline;
    gap: var(--ui-space-2, 0.5rem);
    min-width: 0;
}

.ui-side-panel-title {
    margin: 0;
    font-size: var(--ui-font-size-xl, 0.9375rem);
    font-weight: var(--ui-font-weight-semibold, 600);
    color: var(--ui-text-primary, #1a1a1a);
    white-space: nowrap;
}

/* Names what the panel is scoped to - the record it is covering. */
.ui-side-panel-subtitle {
    font-size: var(--ui-font-size-base, 0.75rem);
    color: var(--ui-text-secondary, #555);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ui-side-panel-actions {
    display: flex;
    align-items: center;
    gap: var(--ui-space-2, 0.5rem);
    flex-shrink: 0;
}

/* ── Body / footer ──────────────────────────────── */

.ui-side-panel-body {
    padding: var(--ui-space-4, 1rem);
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0;
    position: relative;
}

.ui-side-panel-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--ui-space-2, 0.5rem);
    padding: var(--ui-space-3, 0.75rem) var(--ui-space-4, 1rem);
    border-top: 1px solid var(--ui-border, #e9ecef);
    background-color: var(--ui-surface-subtle, #f5f5f3);
    flex-shrink: 0;
}