.right-panels {
    width: var(--panel-width);
    background: var(--bg-panel);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: var(--z-ui);
    overflow: hidden;
}

.panel {
    display: flex;
    flex-direction: column;
    border-bottom: 1px solid var(--border-color);
    overflow: hidden;
    flex-shrink: 0;
}

#properties-panel {
    flex: 1 1 0;
    min-height: 40px;
}

#layers-panel {
    flex: 1 1 0;
    min-height: 80px;
}

.panel-header {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0 10px;
    height: 30px;
    background: var(--bg-hover);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    user-select: none;
}

.panel-header svg {
    flex-shrink: 0;
    opacity: 0.6;
}

.panel-header span {
    font-size: 10.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-secondary);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.panel-content::-webkit-scrollbar {
    width: 3px;
}

.panel-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 2px;
}

/* ── Collapsible panels ── */

.panel.collapsible {
    flex-shrink: 0;
}

.panel-header.collapsible-header {
    cursor: pointer;
    height: 28px;
    padding: 0 10px;
}

.panel-header.collapsible-header:hover {
    background: var(--bg-active);
}

.panel-header.collapsible-header .chevron {
    margin-left: auto;
    transition: transform 0.15s ease;
    opacity: 0.4;
}

.panel.collapsible.collapsed .panel-content {
    display: none !important;
}

.panel.collapsible.collapsed .chevron {
    transform: rotate(-90deg);
}

/* ── Properties panel content ── */

#properties-content {
    padding: 12px;
}

#properties-content .control-group {
    margin-bottom: 12px;
}

#properties-content .control-group:last-child {
    margin-bottom: 0;
}

#properties-content .control-group label {
    display: block;
    margin-bottom: 4px;
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

#properties-content .control-group.row {
    display: flex;
    align-items: center;
    gap: 8px;
}

#properties-content .control-group.row label {
    margin-bottom: 0;
    text-transform: none;
    letter-spacing: 0;
    font-weight: 500;
    font-size: 11px;
}

#properties-content .row {
    display: flex;
    gap: 6px;
}

#properties-content hr {
    margin: 14px 0;
    border: none;
    border-top: 1px solid var(--border-color);
    opacity: 0.5;
}

#properties-content .empty-state {
    color: var(--text-secondary);
    text-align: center;
    padding: 20px 12px;
    font-size: 11px;
    line-height: 1.5;
}

/* ── Layers panel ── */

.layer-toolbar {
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 3px 6px;
    background: var(--bg-app);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.layer-tool-btn {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.12s ease;
    flex-shrink: 0;
}

.layer-tool-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.layer-tool-btn.danger:hover {
    background: rgba(239, 68, 68, 0.12);
    color: #ef4444;
}

.layer-tool-spacer {
    flex: 1;
}

#layers-list {
    list-style: none;
    padding: 3px 4px;
    display: flex;
    flex-direction: column;
    gap: 1px;
    flex: 1;
}

.layer-row {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
    min-width: 0;
}

.layer-item {
    display: flex;
    align-items: center;
    padding: 3px 4px;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 3px;
    cursor: pointer;
    transition: all 0.1s ease;
}

.layer-item:hover {
    background: var(--bg-hover);
}

.layer-item.active {
    background: var(--bg-hover);
    border-color: var(--accent-color);
}

.layer-item .icon-btn {
    opacity: 0.4;
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    padding: 0;
}

.layer-item .icon-btn:hover {
    background: var(--bg-active);
    opacity: 0.7;
}

.layer-thumb {
    width: 24px;
    height: 24px;
    background: var(--bg-workspace);
    border-radius: 3px;
    flex-shrink: 0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--text-secondary);
}

.layer-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.layer-name {
    flex: 1;
    font-size: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
    color: var(--text-primary);
}

.layer-footer {
    flex-shrink: 0;
    border-top: 1px solid var(--border-color);
    padding: 6px 10px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    background: var(--bg-app);
}

.layer-control-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.layer-control-row label {
    font-size: 9.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    color: var(--text-secondary);
    min-width: 40px;
    flex-shrink: 0;
}

.layer-control-row input[type=range] {
    flex: 1;
    height: 4px;
    accent-color: var(--accent-color);
}

.layer-control-row input[type=number] {
    width: 42px;
    height: 22px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: var(--bg-panel);
    color: var(--text-primary);
    text-align: right;
    font-size: 10px;
    padding: 0 4px;
}

.layer-control-row select {
    flex: 1;
    height: 22px;
    border: 1px solid var(--border-color);
    border-radius: 3px;
    background: var(--bg-panel);
    color: var(--text-primary);
    font-size: 10px;
    padding: 0 4px;
}

/* ── Adjustments panel ── */

#adjustments-list {
    padding: 8px 10px;
}

#adjustments-list .control-group {
    margin-bottom: 10px;
}

#adjustments-list .control-group:last-child {
    margin-bottom: 0;
}

#adjustments-list .control-group label {
    display: block;
    margin-bottom: 3px;
    font-size: 9.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-secondary);
}

#adjustments-list input[type=range] {
    width: 100%;
    height: 4px;
    accent-color: var(--accent-color);
}

#adjustments-list .row {
    display: flex;
    gap: 6px;
    align-items: center;
}

/* ── Filter presets panel ── */

#filter-presets {
    padding: 8px 10px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

.preset-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 2px;
    cursor: pointer;
    text-align: center;
    font-size: 10px;
    color: var(--text-primary);
    font-family: inherit;
    font-weight: 500;
    transition: all 0.12s ease;
}

.preset-btn:hover {
    background: var(--bg-hover);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.preset-btn:active {
    transform: scale(0.96);
}

/* ── Utilities ── */

.num-input.small {
    width: 50px;
    text-align: right;
}

.row {
    display: flex;
    gap: 6px;
}

.empty-state {
    color: var(--text-secondary);
    text-align: center;
    padding: 20px 12px;
    font-size: 11px;
    line-height: 1.5;
}

.control-group {
    margin-bottom: 12px;
}

.control-group:last-child {
    margin-bottom: 0;
}

.control-group label {
    display: block;
    margin-bottom: 4px;
    color: var(--text-secondary);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.4px;
}

.control-group.row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.control-group.row label {
    margin-bottom: 0;
    text-transform: none;
    letter-spacing: 0;
    font-weight: 500;
    font-size: 11px;
}

/* ── Stickers ── */

.sticker-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-bottom: 8px;
}

.sticker-tab {
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 5px 8px;
    cursor: pointer;
    font-size: 15px;
    line-height: 1;
    transition: all var(--transition-fast);
    color: var(--text-primary);
}

.sticker-tab:hover {
    background-color: var(--bg-hover);
}

.sticker-tab.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.sticker-cat-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 8px;
    font-weight: 500;
}

.sticker-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 4px;
    max-height: 260px;
    overflow-y: auto;
    overflow-x: hidden;
}

.sticker-grid::-webkit-scrollbar {
    width: 4px;
}

.sticker-grid::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.sticker-item {
    background: transparent;
    border: 1px solid transparent;
    border-radius: 6px;
    padding: 4px 2px;
    cursor: pointer;
    font-size: 22px;
    line-height: 1.2;
    text-align: center;
    transition: all 0.1s;
}

.sticker-item:hover {
    background-color: var(--bg-hover);
    border-color: var(--border-color);
    transform: scale(1.2);
}

.menu-item-checked {
    color: var(--accent-color);
}