/* IFC-Lite Viewer Styles */

/* CSS Variables - Dark Theme (default) */
:root {
    --bg-primary: #1e1e1e;
    --bg-secondary: #252526;
    --bg-tertiary: #2d2d2d;
    --bg-hover: #363636;
    --bg-input: #3c3c3c;
    --bg-selected: #094771;

    --text-primary: #ffffff;
    --text-secondary: #8e8e93;
    --text-muted: #6e6e73;

    --accent-blue: #0a84ff;
    --accent-green: #30d158;
    --accent-red: #ff453a;
    --accent-yellow: #ffd60a;

    --border-color: #3d3d3d;
    --border-light: #4d4d4d;

    --panel-width-left: 280px;
    --panel-width-right: 320px;
    --toolbar-height: 48px;
    --status-bar-height: 28px;

    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;

    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Light Theme */
.theme-light {
    --bg-primary: #f5f5f5;
    --bg-secondary: #ffffff;
    --bg-tertiary: #fafafa;
    --bg-hover: #eeeeee;
    --bg-input: #ffffff;
    --bg-selected: #e3f2fd;

    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --text-muted: #999999;

    --border-color: #e0e0e0;
    --border-light: #eeeeee;

    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.4;
    color: var(--text-primary);
    background: var(--bg-primary);
}

/* Main Layout */
.viewer-layout {
    display: grid;
    grid-template-columns: auto 1fr auto;
    height: 100vh;
    width: 100vw;
    overflow: hidden;
}

/* Panels */
.panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.panel-left {
    width: var(--panel-width-left);
    border-right: 1px solid var(--border-color);
}

.panel-right {
    width: var(--panel-width-right);
    border-left: 1px solid var(--border-color);
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
}

.panel-title {
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.panel-collapse-btn,
.panel-expand-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 10px;
}

.panel-collapse-btn:hover,
.panel-expand-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.panel-expand-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    z-index: 10;
}

.panel-expand-left {
    left: 0;
    border-left: none;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.panel-expand-right {
    right: 0;
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}

/* Viewport Container */
.viewport-container {
    display: flex;
    flex-direction: column;
    position: relative;
    background: var(--bg-primary);
    overflow: hidden;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    gap: 4px;
    height: var(--toolbar-height);
    padding: 0 8px;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.toolbar-group {
    display: flex;
    gap: 2px;
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    margin: 0 6px;
    background: var(--border-color);
}

.toolbar-spacer {
    flex: 1;
}

.tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
    transition: background 0.15s, color 0.15s;
}

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

.tool-btn.active {
    background: var(--accent-blue);
    color: white;
}

.toolbar-loading {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 12px;
}

.loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--border-color);
    border-top-color: var(--accent-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.loading-spinner.large {
    width: 32px;
    height: 32px;
    border-width: 3px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.loading-text {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Viewport */
.viewport {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.viewport-canvas {
    width: 100%;
    height: 100%;
    display: block;
}

.viewport-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
}

.loading-overlay {
    background: rgba(30, 30, 30, 0.9);
}

.error-overlay {
    background: rgba(30, 30, 30, 0.95);
}

.loading-content,
.error-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 24px;
}

.error-icon {
    font-size: 48px;
}

.error-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.error-message {
    font-size: 13px;
    color: var(--text-secondary);
    max-width: 300px;
    text-align: center;
}

.retry-btn {
    padding: 8px 24px;
    background: var(--accent-blue);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-size: 14px;
    cursor: pointer;
}

.retry-btn:hover {
    filter: brightness(1.1);
}

/* Status Bar */
.status-bar {
    display: flex;
    align-items: center;
    height: var(--status-bar-height);
    padding: 0 12px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 12px;
    color: var(--text-secondary);
}

.status-left {
    flex: 1;
}

.status-center {
    display: flex;
    gap: 16px;
}

.status-right {
    flex: 1;
    text-align: right;
}

.status-error {
    color: var(--accent-red);
}

.status-filter {
    background: var(--bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.status-filename {
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Hierarchy Panel */
.hierarchy-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.search-bar {
    display: flex;
    align-items: center;
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
}

.search-input {
    flex: 1;
    padding: 6px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
}

.search-input:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.search-clear {
    margin-left: 4px;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 16px;
}

.search-clear:hover {
    background: var(--bg-hover);
}

.storey-filter {
    padding: 8px;
    border-bottom: 1px solid var(--border-color);
}

.storey-select {
    width: 100%;
    padding: 6px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 13px;
}

.entity-list {
    flex: 1;
    overflow-y: auto;
}

/* Tree Controls */
.tree-controls {
    display: flex;
    gap: 4px;
    padding: 4px 8px;
    border-bottom: 1px solid var(--border-color);
}

.tree-control-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
}

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

/* Tree Node */
.tree-node {
    /* Uses CSS custom property --depth for indentation */
}

.tree-row {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    padding-left: calc(8px + var(--depth, 0) * 16px);
    cursor: pointer;
    transition: background 0.1s;
    min-height: 28px;
}

.tree-row:hover {
    background: var(--bg-hover);
}

.tree-row.selected {
    background: var(--bg-selected);
}

.tree-row.hidden {
    opacity: 0.5;
}

.tree-row.no-geometry {
    opacity: 0.6;
}

.tree-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    font-size: 10px;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.tree-toggle:hover:not(.empty) {
    color: var(--text-primary);
}

.tree-toggle.empty {
    visibility: hidden;
}

.tree-icon {
    font-size: 14px;
    flex-shrink: 0;
}

.tree-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
}

.tree-count {
    font-size: 10px;
    color: var(--text-muted);
    background: var(--bg-primary);
    padding: 1px 5px;
    border-radius: 8px;
    flex-shrink: 0;
}

.tree-children {
    /* Children container */
}

.tree-row .visibility-btn {
    opacity: 0;
    flex-shrink: 0;
}

.tree-row:hover .visibility-btn {
    opacity: 1;
}

.storey-group {
    border-bottom: 1px solid var(--border-color);
}

.storey-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-tertiary);
    font-weight: 500;
    font-size: 13px;
    cursor: pointer;
}

.storey-header:hover {
    background: var(--bg-hover);
}

.storey-icon {
    font-size: 14px;
}

.storey-name {
    flex: 1;
}

.storey-count {
    font-size: 11px;
    color: var(--text-secondary);
    background: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 10px;
}

.storey-entities {
    /* Virtual scrolling container */
}

.entity-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px 6px 24px;
    cursor: pointer;
    transition: background 0.1s;
}

.entity-row:hover {
    background: var(--bg-hover);
}

.entity-row.selected {
    background: var(--bg-selected);
}

.entity-row.hidden {
    opacity: 0.5;
}

.entity-icon {
    font-size: 14px;
    color: var(--text-secondary);
}

.entity-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 13px;
}

.visibility-btn {
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 14px;
    opacity: 0;
    transition: opacity 0.1s;
}

.entity-row:hover .visibility-btn {
    opacity: 1;
}

.visibility-btn:hover {
    background: var(--bg-hover);
}

.visibility-btn.hidden {
    opacity: 1;
    color: var(--text-muted);
}

/* Properties Panel */
.properties-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    padding: 8px 0;
}

.property-section {
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
}

.section-header {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.property-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 4px 0;
    gap: 12px;
}

.property-label {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

.property-value {
    font-size: 13px;
    color: var(--text-primary);
    text-align: right;
    word-break: break-all;
}

.property-value.global-id {
    display: flex;
    align-items: center;
    gap: 4px;
    font-family: monospace;
    font-size: 11px;
}

.copy-btn {
    padding: 2px 4px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
}

.copy-btn:hover {
    background: var(--bg-hover);
}

.action-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 8px;
}

.action-btn {
    padding: 6px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.action-btn:hover {
    background: var(--bg-hover);
}

/* Empty States */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
    text-align: center;
}

.empty-state.small {
    padding: 16px;
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 12px;
}

.empty-text {
    font-size: 14px;
    color: var(--text-secondary);
}

.empty-hint {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 4px;
}

.multi-selection {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 24px;
    text-align: center;
}

.selection-icon {
    font-size: 36px;
    margin-bottom: 8px;
}

.selection-count {
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 16px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

::-webkit-scrollbar-thumb:hover {
    background: var(--border-light);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .viewer-layout {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr;
    }

    .panel-left,
    .panel-right {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        height: 50vh;
        max-height: 400px;
        border: none;
        border-top: 1px solid var(--border-color);
        z-index: 100;
        transform: translateY(100%);
        transition: transform 0.3s ease;
    }

    .panel-left.open,
    .panel-right.open {
        transform: translateY(0);
    }

    .panel-expand-btn {
        position: fixed;
        bottom: calc(var(--status-bar-height) + 8px);
        width: 40px;
        height: 40px;
        border-radius: 50%;
        box-shadow: var(--shadow);
    }

    .panel-expand-left {
        left: 12px;
    }

    .panel-expand-right {
        right: 12px;
    }
}