// ─── Shared sidebar + sidebar-header styles ───────────────────────────────────
// Plain CSS rules (not a mixin) used for M3U/legacy sidebar layouts.
//
// Choose the relative @use path from each consuming stylesheet. Current portal
// live layouts use the example below; other consumers may need a different
// depth. No alias is needed because this partial exports no callable members.
//   @use '../../../../../../ui/styles/portal-sidebar';

.sidebar {
    // Width is controlled by the resizable directive
    // Default fallback if directive not applied
    width: 400px;
    min-width: 250px;
    max-width: 600px;
    border-right: 1px solid var(--app-separator);
    display: flex;
    flex-direction: column;
    flex-shrink: 0; // Prevent sidebar from shrinking

    .sidebar-header {
        padding: 8px 12px;
        background: var(--app-widget-header-bg, var(--mat-sys-surface-container-high));
        border-bottom: 1px solid var(--app-separator);
        app-region: drag;
        display: flex;
        align-items: center;
        gap: 8px;
        flex-shrink: 0;

        h2 {
            margin: 0;
            font-size: 0.94rem;
            font-weight: 600;
            letter-spacing: -0.01em;
            color: var(--mat-sys-on-surface);
            flex: 1;
        }

        button {
            app-region: no-drag;
        }

        .switcher {
            flex: 1;
            min-width: 0;
        }

        .manage-categories-btn {
            margin-left: auto;
        }

        .category-heading {
            display: flex;
            align-items: baseline;
            gap: 8px;
            flex: 1;
            min-width: 0;
        }

        .category-title {
            margin: 0;
            font-size: 0.94rem;
            font-weight: 600;
            letter-spacing: -0.01em;
            color: var(--mat-sys-on-surface);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .category-count {
            flex-shrink: 0;
            font-size: 0.72rem;
            font-weight: 500;
            color: var(--mat-sys-on-surface-variant);
            background: var(--mat-sys-surface-container);
            padding: 2px 8px;
            border-radius: 999px;
        }

        // Shown while the shell's categories rail is folded: the way back to
        // the rail, in the same spot the rail's own chevron folded it from.
        .sidebar-show-categories {
            flex-shrink: 0;
            margin-left: -6px;
        }

        // The category title as a dropdown trigger (categories rail folded).
        // Same type as the static heading so folding the rail does not move
        // the title; the caret is the only added ink.
        .category-dropdown {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            min-width: 0;
            height: 32px;
            padding: 0 4px 0 8px;
            margin-left: -8px;
            border: 1px solid transparent;
            border-radius: 8px;
            background: transparent;
            color: inherit;
            font: inherit;
            cursor: pointer;
            text-align: left;
            app-region: no-drag;

            .category-title {
                flex: 0 1 auto;
                min-width: 0;
            }

            &__caret {
                flex-shrink: 0;
                font-size: 18px;
                width: 18px;
                height: 18px;
                color: var(--mat-sys-on-surface-variant);
            }

            &:hover,
            &[aria-expanded='true'] {
                background: var(--app-hover-overlay, rgba(255, 255, 255, 0.08));
                border-color: var(--app-separator);
            }

            &:focus-visible {
                outline: 2px solid var(--mat-sys-primary);
                outline-offset: -2px;
            }
        }
    }
}