/**
 * ============================================================
 * COLLEKTON SLIDE PANEL - Detail Pane Component
 * ============================================================
 * 
 * A slide-in panel from the right for viewing/editing entity details.
 * Works alongside list views - not a modal overlay.
 * 
 * ============================================================
 */

/* ========================================
   PANEL CONTAINER
   ======================================== */

.slide-panel {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: var(--panel-width, 560px);
    max-width: 100vw;
    background: var(--color-neutral-0);
    border-left: 1px solid var(--color-neutral-200);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-modal);
    
    display: flex;
    flex-direction: column;
    
    /* Slide animation */
    transform: translateX(100%);
    transition: transform var(--duration-300) var(--ease-out);
}

.slide-panel.open {
    transform: translateX(0);
}

/* Panel Width Variants */
.slide-panel--sm { --panel-width: 400px; }
.slide-panel--md { --panel-width: 560px; }
.slide-panel--lg { --panel-width: 720px; }
.slide-panel--xl { --panel-width: 900px; }

/* ========================================
   PANEL HEADER
   ======================================== */

.slide-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-neutral-200);
    background: var(--color-neutral-50);
    flex-shrink: 0;
}

.slide-panel-header-left {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.slide-panel-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    color: var(--color-neutral-500);
    cursor: pointer;
    transition: all var(--duration-150);
}

.slide-panel-close:hover {
    background: var(--color-neutral-200);
    color: var(--color-neutral-700);
}

.slide-panel-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-neutral-900);
    margin: 0;
}

.slide-panel-subtitle {
    font-size: var(--text-xs);
    color: var(--color-neutral-500);
}

.slide-panel-header-right {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* Navigation buttons (prev/next) */
.slide-panel-nav {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    margin-right: var(--space-2);
    padding-right: var(--space-2);
    border-right: 1px solid var(--color-neutral-200);
}

.slide-panel-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid var(--color-neutral-200);
    background: var(--color-neutral-0);
    border-radius: var(--radius-sm);
    color: var(--color-neutral-500);
    cursor: pointer;
    transition: all var(--duration-150);
}

.slide-panel-nav-btn:hover:not(:disabled) {
    background: var(--color-neutral-100);
    color: var(--color-neutral-700);
    border-color: var(--color-neutral-300);
}

.slide-panel-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Header action buttons */
.slide-panel-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-md);
    color: var(--color-neutral-500);
    cursor: pointer;
    transition: all var(--duration-150);
}

.slide-panel-action:hover {
    background: var(--color-neutral-100);
    color: var(--color-neutral-700);
}

.slide-panel-action.active {
    background: var(--color-accent-100);
    color: var(--color-accent-600);
}

/* ========================================
   PANEL BODY
   ======================================== */

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

/* Content transition for switching between items */
.slide-panel-content {
    transition: opacity 150ms ease-out;
}

.slide-panel-content.fade-out {
    opacity: 0;
}

.slide-panel-content.fade-in {
    opacity: 1;
    transition: opacity 250ms ease-in;
}

/* Panel sections */
.slide-panel-section {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-neutral-100);
}

.slide-panel-section:last-child {
    border-bottom: none;
}

.slide-panel-section-title {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-neutral-500);
    margin: 0 0 var(--space-3) 0;
}

/* Image area */
.slide-panel-image {
    position: relative;
    background: var(--color-neutral-100);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
}

.slide-panel-image img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

.slide-panel-image-actions {
    position: absolute;
    bottom: var(--space-2);
    right: var(--space-2);
    display: flex;
    gap: var(--space-1);
}

.slide-panel-image-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-neutral-600);
    cursor: pointer;
    transition: all var(--duration-150);
    backdrop-filter: blur(4px);
}

.slide-panel-image-btn:hover {
    background: var(--color-neutral-0);
    color: var(--color-neutral-900);
}

/* ========================================
   PANEL FOOTER
   ======================================== */

.slide-panel-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-4);
    border-top: 1px solid var(--color-neutral-200);
    background: var(--color-neutral-50);
    flex-shrink: 0;
}

.slide-panel-footer-left,
.slide-panel-footer-right {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ========================================
   LOADING & EMPTY STATES
   ======================================== */

.slide-panel-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    color: var(--color-neutral-400);
}

.slide-panel-loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--color-neutral-200);
    border-top-color: var(--color-accent-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.slide-panel-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-12);
    text-align: center;
    color: var(--color-neutral-400);
}

.slide-panel-empty-icon {
    width: 48px;
    height: 48px;
    margin-bottom: var(--space-3);
    opacity: 0.5;
}

/* ========================================
   CONTENT LAYOUT HELPERS
   ======================================== */

/* Field groups for detail display */
.panel-field {
    margin-bottom: var(--space-3);
}

.panel-field:last-child {
    margin-bottom: 0;
}

.panel-field-label {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-neutral-500);
    margin-bottom: var(--space-1);
}

.panel-field-value {
    font-size: var(--text-sm);
    color: var(--color-neutral-900);
    line-height: 1.5;
}

.panel-field-value a {
    color: var(--color-accent-600);
    text-decoration: none;
}

.panel-field-value a:hover {
    text-decoration: underline;
}

/* Two-column layout */
.panel-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.panel-grid-full {
    grid-column: 1 / -1;
}

/* Tabs in panel */
.panel-tabs {
    display: flex;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    background: var(--color-neutral-50);
    border-bottom: 1px solid var(--color-neutral-200);
}

.panel-tab {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-neutral-600);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-150);
}

.panel-tab:hover {
    background: var(--color-neutral-200);
    color: var(--color-neutral-800);
}

.panel-tab.active {
    background: var(--color-neutral-0);
    color: var(--color-neutral-900);
    box-shadow: var(--shadow-sm);
}

/* ========================================
   LIST VIEW ADJUSTMENT
   When panel is open, shrink list
   ======================================== */

.has-panel-open {
    --panel-width: 560px;
}

.has-panel-open .main-content,
.has-panel-open .index-container {
    margin-right: var(--panel-width);
    transition: margin-right var(--duration-300) var(--ease-out);
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
    .slide-panel {
        --panel-width: 480px;
    }
    
    .slide-panel--lg,
    .slide-panel--xl {
        --panel-width: 480px;
    }
}

@media (max-width: 768px) {
    .slide-panel {
        --panel-width: 100%;
        border-left: none;
    }
    
    /* On mobile, panel overlays the list */
    .has-panel-open .main-content,
    .has-panel-open .index-container {
        margin-right: 0;
    }
}

/* ========================================
   DARK MODE
   ======================================== */

.dark .slide-panel {
    background: var(--color-neutral-900);
    border-color: var(--color-neutral-700);
}

.dark .slide-panel-header {
    background: var(--color-neutral-800);
    border-color: var(--color-neutral-700);
}

.dark .slide-panel-close:hover {
    background: var(--color-neutral-700);
    color: var(--color-neutral-200);
}

.dark .slide-panel-title {
    color: var(--color-neutral-100);
}

.dark .slide-panel-nav-btn {
    background: var(--color-neutral-800);
    border-color: var(--color-neutral-700);
    color: var(--color-neutral-400);
}

.dark .slide-panel-nav-btn:hover:not(:disabled) {
    background: var(--color-neutral-700);
    color: var(--color-neutral-200);
}

.dark .slide-panel-action:hover {
    background: var(--color-neutral-800);
    color: var(--color-neutral-200);
}

.dark .slide-panel-section {
    border-color: var(--color-neutral-800);
}

.dark .slide-panel-image {
    background: var(--color-neutral-800);
}

.dark .slide-panel-footer {
    background: var(--color-neutral-800);
    border-color: var(--color-neutral-700);
}

.dark .panel-field-value {
    color: var(--color-neutral-100);
}

.dark .panel-tabs {
    background: var(--color-neutral-800);
    border-color: var(--color-neutral-700);
}

.dark .panel-tab:hover {
    background: var(--color-neutral-700);
    color: var(--color-neutral-200);
}

.dark .panel-tab.active {
    background: var(--color-neutral-900);
    color: var(--color-neutral-100);
}

/* ========================================
   ENTITY CONTENT STYLES
   Specific styles for entity panel content
   ======================================== */

/* Entity Header */
.panel-entity-header {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-neutral-100);
}

.panel-entity-type {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-neutral-500);
    margin-bottom: var(--space-1);
}

.panel-entity-type svg {
    width: 14px;
    height: 14px;
}

.panel-entity-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-neutral-900);
    margin: 0 0 var(--space-1) 0;
    line-height: 1.3;
}

.panel-entity-subtitle {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-neutral-500);
}

.panel-entity-link {
    color: var(--color-accent-600);
    text-decoration: none;
}

.panel-entity-link:hover {
    text-decoration: underline;
}

.panel-entity-sep {
    color: var(--color-neutral-300);
}

/* Image Section */
.panel-image-section {
    background: var(--color-neutral-100);
    border-bottom: 1px solid var(--color-neutral-200);
}

.panel-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    max-height: 350px;
    padding: var(--space-4);
}

.panel-image {
    max-width: 100%;
    max-height: 320px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

.panel-image-toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-4);
    background: var(--color-neutral-50);
    border-top: 1px solid var(--color-neutral-200);
}

.panel-image-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-neutral-0);
    border: 1px solid var(--color-neutral-200);
    border-radius: var(--radius-sm);
    color: var(--color-neutral-500);
    cursor: pointer;
    transition: all var(--duration-150);
}

.panel-image-btn:hover:not(:disabled) {
    background: var(--color-neutral-100);
    color: var(--color-neutral-700);
    border-color: var(--color-neutral-300);
}

.panel-image-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.panel-image-count {
    font-size: var(--text-xs);
    color: var(--color-neutral-500);
    padding: 0 var(--space-2);
}

.panel-image-spacer {
    flex: 1;
}

/* Status Bar */
.panel-status-bar {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--color-neutral-50);
    border-bottom: 1px solid var(--color-neutral-200);
}

.panel-status-spacer {
    flex: 1;
}

/* Panel Sections */
.panel-section {
    padding: var(--space-4);
    border-bottom: 1px solid var(--color-neutral-100);
}

.panel-section:last-child {
    border-bottom: none;
}

.panel-section-title {
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-neutral-500);
    margin: 0 0 var(--space-3) 0;
}

/* Panel Fields */
.panel-fields {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.panel-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.panel-field-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
}

.panel-field-label {
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-neutral-500);
}

.panel-field-value {
    font-size: var(--text-sm);
    color: var(--color-neutral-900);
    line-height: 1.5;
}

.panel-field-value a {
    color: var(--color-accent-600);
    text-decoration: none;
}

.panel-field-value a:hover {
    text-decoration: underline;
}

/* Editable fields in panel */
.panel-field[data-editable] .panel-field-value {
    padding: var(--space-1) var(--space-2);
    margin: calc(-1 * var(--space-1)) calc(-1 * var(--space-2));
    border-radius: var(--radius-sm);
    transition: background var(--duration-150);
}

[data-edit-mode="true"] .panel-field[data-editable] .panel-field-value {
    cursor: pointer;
}

[data-edit-mode="true"] .panel-field[data-editable] .panel-field-value:hover {
    background: var(--color-accent-50);
}

/* Location Path */
.panel-location-path {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
    margin-bottom: var(--space-3);
}

.panel-location-path a {
    color: var(--color-accent-600);
    text-decoration: none;
}

.panel-location-path a:hover {
    text-decoration: underline;
}

.panel-location-sep {
    color: var(--color-neutral-300);
}

.panel-location-actions {
    display: flex;
    gap: var(--space-2);
}

/* Tab Content */
.panel-tabs-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

/* Loading state in panel */
.panel-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8);
    gap: var(--space-3);
    color: var(--color-neutral-400);
    font-size: var(--text-sm);
}

.panel-loading-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-neutral-200);
    border-top-color: var(--color-accent-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* Quick Actions Footer */
.panel-quick-actions {
    display: flex;
    justify-content: space-around;
    padding: var(--space-2) var(--space-4);
    background: var(--color-neutral-50);
    border-top: 1px solid var(--color-neutral-200);
    flex-shrink: 0;
}

.panel-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--color-neutral-600);
    font-size: var(--text-xs);
    cursor: pointer;
    transition: all var(--duration-150);
    min-width: 60px;
}

.panel-action-btn:hover {
    background: var(--color-neutral-200);
    color: var(--color-neutral-800);
}

.panel-action-btn svg {
    flex-shrink: 0;
}

/* ========================================
   ENTITY-SPECIFIC THEMES
   Color accents per entity type
   ======================================== */

.panel-entity--artwork .panel-entity-type { color: var(--color-info-600); }
.panel-entity--artist .panel-entity-type { color: var(--color-warning-600); }
.panel-entity--location .panel-entity-type { color: var(--color-success-600); }
.panel-entity--person .panel-entity-type { color: #8b5cf6; }
.panel-entity--company .panel-entity-type { color: var(--color-error-600); }

/* ========================================
   DARK MODE - Entity Content
   ======================================== */

.dark .panel-entity-header {
    border-color: var(--color-neutral-800);
}

.dark .panel-entity-title {
    color: var(--color-neutral-100);
}

.dark .panel-entity-link {
    color: var(--color-accent-400);
}

.dark .panel-image-section {
    background: var(--color-neutral-800);
    border-color: var(--color-neutral-700);
}

.dark .panel-image-toolbar {
    background: var(--color-neutral-850);
    border-color: var(--color-neutral-700);
}

.dark .panel-image-btn {
    background: var(--color-neutral-800);
    border-color: var(--color-neutral-700);
    color: var(--color-neutral-400);
}

.dark .panel-image-btn:hover:not(:disabled) {
    background: var(--color-neutral-700);
    color: var(--color-neutral-200);
}

.dark .panel-status-bar {
    background: var(--color-neutral-850);
    border-color: var(--color-neutral-700);
}

.dark .panel-section {
    border-color: var(--color-neutral-800);
}

.dark .panel-field-value {
    color: var(--color-neutral-100);
}

.dark .panel-location-path a {
    color: var(--color-accent-400);
}

.dark [data-edit-mode="true"] .panel-field[data-editable] .panel-field-value:hover {
    background: var(--color-accent-900);
}

.dark .panel-quick-actions {
    background: var(--color-neutral-850);
    border-color: var(--color-neutral-700);
}

.dark .panel-action-btn {
    color: var(--color-neutral-400);
}

.dark .panel-action-btn:hover {
    background: var(--color-neutral-700);
    color: var(--color-neutral-200);
}