.pb-prompt-builder-container {
    display: flex;
    height: 600px;
    max-height: 600px;
    overflow: hidden;
    background: var(--background);
}

/* Left Navigation Panel */
.pb-nav-panel {
    width: 300px;
    min-width: 200px;
    max-width: 600px;
    background: var(--background-panel);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding: 0;
    display: flex;
    flex-direction: column;
}

.pb-nav-search-box {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.pb-nav-search-input {
    width: 100%;
    padding: 8px 10px;
    font-size: 0.9em;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    outline: none;
    background: var(--background);
    color: var(--text);
}

.pb-nav-search-input:focus {
    border-color: var(--emphasis);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--emphasis) 20%, transparent);
}

.pb-nav-panel > ul {
    flex: 1;
    overflow-y: auto;
    padding: 10px 0;
}

/* Resize Handle */
.pb-resize-handle {
    width: 5px;
    background: var(--border-color);
    cursor: col-resize;
    flex-shrink: 0;
    transition: background 0.2s;
}

.pb-resize-handle:hover {
    background: var(--emphasis);
}

.pb-nav-panel ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.pb-nav-panel li {
    margin: 0;
    padding: 0;
}

.pb-nav-group {
    font-weight: 600;
    padding: 10px 15px;
    cursor: pointer;
    color: var(--text);
    border-left: 3px solid transparent;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pb-nav-group:hover {
    background: var(--button-background-hover);
}

.pb-nav-group.active {
    background: var(--background-selected);
    border-left-color: var(--emphasis);
    color: var(--emphasis);
}

.pb-nav-label {
    flex: 1;
    user-select: none;
}

.pb-nav-subgroup {
    padding: 8px 15px 8px 30px;
    cursor: pointer;
    color: var(--text-soft);
    font-size: 0.9em;
    border-left: 3px solid transparent;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pb-nav-subgroup:hover {
    background: var(--button-background-hover);
}

.pb-nav-subgroup.active {
    background: var(--background-selected);
    border-left-color: var(--emphasis);
    color: var(--emphasis);
}

.pb-nav-subgroup.pb-nav-subgroup-nested {
    padding-left: 45px;
    font-size: 0.85em;
}

.pb-nav-subgroup.pb-nav-subgroup-nested-2 {
    padding-left: 60px;
    font-size: 0.85em;
}

/* Right Content Panel */
.pb-content-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pb-selected-tags-container {
    background: var(--background-panel);
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
    min-height: 80px;
    display: flex;
    gap: 12px;
    align-items: center;
}

.pb-action-button {
    padding: 8px 14px;
    background: var(--button-background);
    color: var(--button-text);
    border: 1px solid var(--button-border);
    border-radius: 4px;
    cursor: pointer;
    font-size: 1em;
    font-weight: 600;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 4px;
    white-space: nowrap;
    flex-shrink: 0;
}

.pb-action-button:hover {
    background: var(--button-background-hover);
    color: var(--button-foreground-hover);
    transform: translateY(-1px);
}

.pb-action-button:active {
    transform: translateY(0);
}

.pb-action-button:disabled {
    background: var(--backend-running);
    cursor: default;
    transform: none;
}

.pb-selected-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    flex: 1;
}

.pb-tag-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    background: var(--emphasis);
    color: var(--emphasis-text);
    border-radius: 16px;
    font-size: 0.9em;
    gap: 6px;
    cursor: grab;
    user-select: none;
    transition: all 0.2s;
}

.pb-tag-chip:active {
    cursor: grabbing;
}

.pb-tag-chip.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.pb-tag-chip.drag-over-left {
    border-left: 3px solid var(--text);
    padding-left: 8px;
}

.pb-tag-chip.drag-over-right {
    border-right: 3px solid var(--text);
    padding-right: 8px;
}

.pb-tag-chip.pb-related-highlight {
    box-shadow: 0 0 0 2px var(--toggle-background);
}

.pb-tag-chip-editing {
    padding: 2px 4px;
}

.pb-tag-chip-input {
    background: var(--background);
    color: var(--text);
    border: 1px solid var(--text);
    border-radius: 12px;
    padding: 4px 10px;
    font-size: 0.9em;
    outline: none;
    min-width: 80px;
}

.pb-tag-chip-input:focus {
    border-color: var(--button-text);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--button-text) 30%, transparent);
}

.pb-items-container {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    background: var(--background);
}

.pb-items-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 10px;
}

.pb-item-card {
    padding: 10px 12px;
    background: var(--background-panel);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9em;
    color: var(--text);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.pb-item-card:hover {
    background: var(--button-background-hover);
    border-color: var(--emphasis);
    transform: translateY(-1px);
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.pb-item-card.selected {
    background: var(--emphasis);
    color: var(--emphasis-text);
    border-color: var(--emphasis);
}

.pb-item-card-text {
    flex: 1;
    word-break: break-word;
}

.pb-item-card-link {
    flex-shrink: 0;
    font-size: 1em;
    text-decoration: none;
    opacity: 0.6;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    padding: 2px 4px;
    border-radius: 3px;
}

.pb-item-card-link:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.1);
}

.pb-item-card.selected .pb-item-card-link {
    opacity: 0.8;
}

.pb-item-card.selected .pb-item-card-link:hover {
    opacity: 1;
    background: rgba(255, 255, 255, 0.2);
}

.pb-no-selection {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-soft);
}

.pb-no-selection h3 {
    margin: 0 0 10px 0;
    font-size: 1.3em;
    color: var(--text);
}

.pb-no-selection p {
    margin: 0;
    font-size: 0.95em;
}

.pb-error {
    background: var(--background-danger);
    border: 1px solid var(--red);
    padding: 15px;
    border-radius: 4px;
    color: var(--red);
    margin: 20px;
}

.pb-settings-gear {
    position: absolute !important;
    left: 0 !important;
    top: 0 !important;
}

.pb-settings-gear-wrapper {
    position: relative;
    width: 0;
    height: 0;
    align-self: flex-start;
    margin-right: 20px;
}

/* Settings Popover */
.pb-setting-item {
    padding: 0.5rem 0;
    cursor: help;
}

.pb-setting-item:not(:last-child) {
    border-bottom: 1px solid var(--light-border);
}

.pb-setting-number-input {
    background: var(--background);
    border: 1px solid var(--border-color);
    color: var(--text);
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    font-size: 0.9em;
    width: 4rem;
    margin-left: 0.5rem;
}

.pb-setting-number-input:focus {
    outline: none;
    border-color: var(--emphasis);
}

#pb-popup-app {
    width: 100vw;
    height: 100vh;
}

.pb-prompt-builder-container {
    height: 100vh !important;
    max-height: none !important;
}