/* ============================================== */
/* VikCraft Gantt Chart v2.0 - Complete Styles    */
/* ============================================== */

/* --- Reset --- */
.gantt-wrapper *,
.gantt-wrapper *::before,
.gantt-wrapper *::after {
    box-sizing: border-box;
}

/* --- CSS Variables / Theming --- */
:root {
    --gantt-primary: #3b82f6;
    --gantt-primary-hover: #2563eb;
    --gantt-secondary: #6b7280;
    --gantt-danger: #ef4444;
    --gantt-danger-hover: #dc2626;
    --gantt-success: #10b981;
    --gantt-warning: #f59e0b;
    --gantt-task-bar: #60a5fa;
    --gantt-task-bar-progress: #2563eb;
    --gantt-critical-bar: #ef4444;
    --gantt-critical-bar-progress: #b91c1c;
    --gantt-milestone: #8b5cf6;
    --gantt-border: #e5e7eb;
    --gantt-border-light: #f3f4f6;
    --gantt-header-bg: #f9fafb;
    --gantt-row-hover: #eff6ff;
    --gantt-row-selected: #dbeafe;
    --gantt-text: #1f2937;
    --gantt-text-light: #6b7280;
    --gantt-text-muted: #9ca3af;
    --gantt-bg: #ffffff;
    --gantt-bg-alt: #f9fafb;
    --gantt-today-line: #ef4444;
    --gantt-dependency: #f59e0b;
    --gantt-shadow: 0 4px 12px rgba(0,0,0,0.08);
    --gantt-shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --gantt-radius: 8px;
    --gantt-radius-sm: 4px;
    --gantt-radius-lg: 12px;
    --gantt-transition: 0.2s ease;
}

/* ================================== */
/* WRAPPER & TOP TOOLBAR              */
/* ================================== */

.gantt-wrapper {
    font-family: Inter, system-ui, -apple-system, sans-serif;
    color: var(--gantt-text);
    position: relative;
}

.gantt-top-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    background: var(--gantt-bg);
    border: 1px solid var(--gantt-border);
    border-radius: var(--gantt-radius-lg) var(--gantt-radius-lg) 0 0;
    gap: 10px;
    flex-wrap: wrap;
    position: sticky;
    top: 0;
    z-index: 20;
    transition: box-shadow 0.2s ease;
}

.gantt-top-toolbar.is-stuck {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
    border-radius: 0;
}

.gantt-toolbar-left {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.gantt-toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

/* --- View Tabs (Task / User) --- */
.gantt-view-tabs {
    display: flex;
    background: var(--gantt-border-light);
    border-radius: 8px;
    padding: 3px;
    gap: 2px;
}

.gantt-view-tab {
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    background: transparent;
    color: var(--gantt-text-light);
    transition: all var(--gantt-transition);
    white-space: nowrap;
}

.gantt-view-tab:hover {
    background: rgba(0,0,0,0.04);
    color: var(--gantt-text);
}

.gantt-view-tab.active {
    background: var(--gantt-bg);
    color: var(--gantt-primary);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}

/* --- Toolbar Buttons --- */
.gantt-toolbar-btn {
    font-family: inherit;
    font-size: 13px;
    font-weight: 500;
    padding: 6px 12px;
    border: 1px solid var(--gantt-border);
    border-radius: 6px;
    cursor: pointer;
    background: var(--gantt-bg);
    color: var(--gantt-text);
    transition: all var(--gantt-transition);
    display: inline-flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}

.gantt-toolbar-btn:hover {
    background: var(--gantt-border-light);
    border-color: var(--gantt-text-muted);
}

.gantt-toolbar-btn.active {
    background: var(--gantt-primary);
    color: #fff;
    border-color: var(--gantt-primary);
}

.gantt-toolbar-btn.primary {
    background: var(--gantt-primary);
    color: #fff;
    border-color: var(--gantt-primary);
}

.gantt-toolbar-btn.primary:hover {
    background: var(--gantt-primary-hover);
}

.gantt-toolbar-btn.danger {
    color: var(--gantt-danger);
    border-color: var(--gantt-danger);
}

.gantt-toolbar-btn.danger:hover {
    background: #fef2f2;
}

/* --- Zoom Controls --- */
.gantt-zoom-controls {
    display: flex;
    align-items: center;
    gap: 4px;
    border: 1px solid var(--gantt-border);
    border-radius: 6px;
    padding: 2px;
    background: var(--gantt-bg);
}

.gantt-zoom-btn {
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    padding: 4px 8px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: transparent;
    color: var(--gantt-text);
    transition: all var(--gantt-transition);
    line-height: 1;
}

.gantt-zoom-btn:hover {
    background: var(--gantt-border-light);
}

/* --- View Mode Buttons --- */
.gantt-view-modes {
    display: flex;
    gap: 2px;
    border: 1px solid var(--gantt-border);
    border-radius: 6px;
    padding: 2px;
    background: var(--gantt-bg);
}

.gantt-view-mode-btn {
    font-family: inherit;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    background: transparent;
    color: var(--gantt-text-light);
    transition: all var(--gantt-transition);
}

.gantt-view-mode-btn:hover {
    background: var(--gantt-border-light);
    color: var(--gantt-text);
}

.gantt-view-mode-btn.active {
    background: var(--gantt-primary);
    color: #fff;
}

/* ================================== */
/* MAIN GANTT CONTAINER               */
/* ================================== */

.gantt-container {
    display: flex;
    border: 1px solid var(--gantt-border);
    border-top: none;
    border-radius: 0 0 var(--gantt-radius-lg) var(--gantt-radius-lg);
    background-color: var(--gantt-bg);
    box-shadow: var(--gantt-shadow);
    height: 70vh;
    overflow: hidden;
}

/* --- Panel Resizer --- */
.gantt-resizer {
    width: 5px;
    background-color: var(--gantt-border-light);
    cursor: col-resize;
    flex-shrink: 0;
    z-index: 10;
    transition: background var(--gantt-transition);
}

.gantt-resizer:hover,
.gantt-resizer.active {
    background-color: var(--gantt-primary);
}

/* ================================== */
/* GRID (LEFT PANEL)                  */
/* ================================== */

.gantt-grid-container {
    width: 550px;
    min-width: 200px;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    background: var(--gantt-bg);
}

.gantt-grid-header {
    display: flex;
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--gantt-text-light);
    border-bottom: 2px solid var(--gantt-border);
    background-color: var(--gantt-header-bg);
    height: 40px;
    align-items: center;
    flex-shrink: 0;
}

.gantt-grid-header .gantt-grid-cell {
    position: relative;
}

.gantt-header-resizer {
    width: 5px;
    height: 100%;
    cursor: col-resize;
    background-color: transparent;
    position: absolute;
    right: 0;
    top: 0;
    z-index: 1;
    transition: background var(--gantt-transition);
}

.gantt-header-resizer:hover {
    background-color: var(--gantt-primary);
}

.gantt-grid-body {
    overflow-y: auto;
    overflow-x: hidden;
    flex-grow: 1;
}

.gantt-grid-row {
    display: flex;
    align-items: center;
    border-bottom: 1px solid var(--gantt-border-light);
    background-color: var(--gantt-bg);
    position: relative;
    transition: background var(--gantt-transition);
    cursor: pointer;
}

.gantt-grid-row:hover {
    background-color: var(--gantt-row-hover);
}

.gantt-grid-row.selected {
    background-color: var(--gantt-row-selected);
}

.gantt-grid-row.parent-row {
    font-weight: 600;
}

.gantt-grid-cell {
    padding: 0 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    border-right: 1px solid var(--gantt-border-light);
    height: 100%;
    font-size: 13px;
}

.gantt-grid-cell:last-child {
    border-right: none;
}

/* --- Task Name Indent & Expand Toggle --- */
.task-name-indent {
    padding-left: var(--indent-padding, 0px);
    display: flex;
    align-items: center;
    gap: 4px;
    width: 100%;
}

.gantt-expand-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border: none;
    background: transparent;
    cursor: pointer;
    font-size: 10px;
    color: var(--gantt-text-light);
    border-radius: 3px;
    flex-shrink: 0;
    transition: all var(--gantt-transition);
}

.gantt-expand-toggle:hover {
    background: var(--gantt-border-light);
    color: var(--gantt-text);
}

.gantt-expand-toggle.collapsed {
    transform: rotate(-90deg);
}

.gantt-expand-spacer {
    display: inline-block;
    width: 18px;
    flex-shrink: 0;
}

/* --- Row Hover Actions --- */
.gantt-task-actions {
    display: none;
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--gantt-bg);
    border-radius: var(--gantt-radius-sm);
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    z-index: 2;
    border: 1px solid var(--gantt-border);
}

.gantt-grid-row:hover .gantt-task-actions {
    display: flex;
}

.gantt-action-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px 6px;
    border-radius: var(--gantt-radius-sm);
    font-size: 13px;
    transition: background var(--gantt-transition);
}

.gantt-action-btn:hover {
    background-color: var(--gantt-border-light);
}

.gantt-action-btn.delete:hover {
    background-color: #fef2f2;
    color: var(--gantt-danger);
}

/* --- Progress Badge --- */
.gantt-progress-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 600;
}

.gantt-progress-mini {
    width: 40px;
    height: 5px;
    background: var(--gantt-border);
    border-radius: 3px;
    overflow: hidden;
}

.gantt-progress-mini-fill {
    height: 100%;
    background: var(--gantt-primary);
    border-radius: 3px;
    transition: width var(--gantt-transition);
}

/* ================================== */
/* CHART (RIGHT PANEL)                */
/* ================================== */

/* Outer chart column — mirrors .gantt-grid-container structure:
   [timeline header (fixed)] + [scroll area (bars)] */
.gantt-chart-outer {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-width: 0;
}

/* Scroll area: only the bars, no header inside */
.gantt-chart-container {
    flex: 1 1 0;
    min-height: 0;
    overflow-x: auto;
    overflow-y: auto;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* --- Timeline Header --- */
/* No longer sticky — it sits naturally above the scroll container
   just like .gantt-grid-header sits above .gantt-grid-body.
   Horizontal scroll is synced via JS so it tracks the bars. */
.gantt-timeline-header {
    display: flex;
    flex-direction: column;
    background-color: var(--gantt-header-bg);
    flex-shrink: 0;
    height: 40px;           /* match .gantt-grid-header exactly */
    border-bottom: 2px solid var(--gantt-border);
    overflow: hidden;
}

.gantt-timeline-row {
    display: flex;
    flex: 1;                /* fill available height evenly */
    min-height: 0;
}

.gantt-timeline-row:first-child {
    border-bottom: 1px solid var(--gantt-border);
}

.gantt-timeline-cell {
    flex-shrink: 0;
    text-align: center;
    border-right: 1px solid var(--gantt-border);
    color: var(--gantt-text-light);
    font-size: 11px;
    font-weight: 500;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2px 4px;
    white-space: nowrap;
    overflow: hidden;
}

.gantt-timeline-cell.month-cell {
    font-weight: 700;
    font-size: 12px;
    color: var(--gantt-text);
    background: rgba(0,0,0,0.02);
}

.gantt-timeline-cell.today {
    background: rgba(239,68,68,0.08);
    color: var(--gantt-today-line);
    font-weight: 700;
}

.gantt-timeline-cell.weekend {
    background: rgba(0,0,0,0.02);
}

/* --- Bars Container --- */
.gantt-bars-container {
    position: relative;
    flex-grow: 1;
}

.gantt-grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

/* --- Today Line --- */
.gantt-today-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--gantt-today-line);
    z-index: 3;
    pointer-events: none;
}

.gantt-today-line::before {
    content: 'Today';
    position: absolute;
    top: -18px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 10px;
    font-weight: 700;
    color: var(--gantt-today-line);
    background: #fef2f2;
    padding: 1px 6px;
    border-radius: 3px;
    white-space: nowrap;
}

/* --- Task Bars --- */
.gantt-bar {
    position: absolute;
    background-color: var(--gantt-task-bar);
    border-radius: var(--gantt-radius-sm);
    cursor: move;
    display: flex;
    align-items: center;
    color: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.12);
    transition: box-shadow var(--gantt-transition), transform var(--gantt-transition);
    z-index: 1;
    min-width: 4px;
}

.gantt-bar:hover {
    box-shadow: 0 3px 8px rgba(0,0,0,0.2);
    transform: translateY(-1px);
    z-index: 2;
}

.gantt-bar.selected {
    outline: 2px solid var(--gantt-primary);
    outline-offset: 1px;
    z-index: 2;
}

.gantt-bar.critical {
    background-color: var(--gantt-critical-bar);
}

.gantt-bar.critical .gantt-bar-progress {
    background-color: var(--gantt-critical-bar-progress);
}

.gantt-bar.milestone {
    background-color: var(--gantt-milestone);
    border-radius: 0;
    transform: rotate(45deg);
}

.gantt-bar.parent-bar {
    background-color: #374151;
    border-radius: 2px;
    opacity: 0.8;
}

.gantt-bar-progress {
    height: 100%;
    background-color: var(--gantt-task-bar-progress);
    border-radius: var(--gantt-radius-sm);
    opacity: 0.7;
    transition: width var(--gantt-transition);
}

.gantt-bar-label {
    position: absolute;
    left: 8px;
    right: 8px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    pointer-events: none;
    font-size: 12px;
    font-weight: 500;
}

.gantt-resize-handle {
    position: absolute;
    right: 0;
    top: 0;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    z-index: 2;
}

.gantt-resize-handle-left {
    position: absolute;
    left: 0;
    top: 0;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    z-index: 2;
}

/* --- Bar Tooltip --- */
.gantt-bar-tooltip {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: #1f2937;
    color: #fff;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    white-space: nowrap;
    pointer-events: none;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--gantt-transition), visibility var(--gantt-transition);
}

.gantt-bar:hover .gantt-bar-tooltip {
    opacity: 1;
    visibility: visible;
}

.gantt-bar-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: #1f2937;
}

/* --- Dependencies SVG --- */
.gantt-dependency-svg {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    overflow: visible;
    z-index: 1;
}

.gantt-dependency-line {
    stroke: var(--gantt-dependency);
    stroke-width: 2;
    fill: none;
    marker-end: url(#gantt-arrow);
}

.gantt-dependency-line.critical {
    stroke: var(--gantt-danger);
    stroke-width: 2.5;
}

/* ================================== */
/* USER VIEW                          */
/* ================================== */

.gantt-user-group-header {
    display: flex;
    align-items: center;
    gap: 8px;
    height: 100%;
    font-weight: 700;
    font-size: 13px;
    background: var(--gantt-header-bg);
    border-bottom: 2px solid var(--gantt-border);
}

.gantt-user-avatar {
    width: 26px;
    height: 26px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: 700;
    color: #fff;
    flex-shrink: 0;
}

.gantt-user-task-count {
    font-size: 11px;
    font-weight: 500;
    color: var(--gantt-text-muted);
    background: var(--gantt-border-light);
    padding: 1px 6px;
    border-radius: 10px;
}

/* --- User View Bar (grouped row) --- */
.gantt-user-group-bar {
    position: absolute;
    height: 4px;
    background: var(--gantt-border);
    border-radius: 2px;
    z-index: 0;
}

/* ================================== */
/* MODAL                              */
/* ================================== */

.gantt-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    backdrop-filter: blur(2px);
}

.gantt-modal-overlay.visible {
    opacity: 1;
    visibility: visible;
}

.gantt-modal {
    background: var(--gantt-bg);
    padding: 24px;
    border-radius: var(--gantt-radius-lg);
    width: 90%;
    max-width: 560px;
    box-shadow: var(--gantt-shadow-lg);
    transform: scale(0.95) translateY(10px);
    transition: transform 0.3s ease;
    max-height: 90vh;
    overflow-y: auto;
    color: var(--gantt-text);
}

.gantt-modal-overlay.visible .gantt-modal {
    transform: scale(1) translateY(0);
}

.gantt-modal h2 {
    margin: 0 0 20px;
    font-size: 18px;
    font-weight: 700;
}

.gantt-modal-content .form-group {
    margin-bottom: 14px;
}

.gantt-modal-content label {
    display: block;
    margin-bottom: 4px;
    font-weight: 600;
    font-size: 13px;
    color: var(--gantt-text-light);
}

.gantt-modal-content input,
.gantt-modal-content select,
.gantt-modal-content textarea {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--gantt-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 14px;
    color: var(--gantt-text);
    background: var(--gantt-bg);
    transition: border-color var(--gantt-transition);
}

.gantt-modal-content input:focus,
.gantt-modal-content select:focus,
.gantt-modal-content textarea:focus {
    outline: none;
    border-color: var(--gantt-primary);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.15);
}

.gantt-modal-content select[multiple] {
    height: 100px;
    padding: 0;
}

.gantt-modal-content select[multiple] option {
    padding: 6px 10px;
}

.gantt-modal-content .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.gantt-modal-content .form-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 12px;
}

.gantt-modal-content .help-text {
    font-size: 11px;
    color: var(--gantt-text-muted);
    margin-top: 3px;
}

.gantt-modal-actions {
    margin-top: 20px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.gantt-modal-actions button {
    font-family: inherit;
    padding: 8px 18px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: all var(--gantt-transition);
}

.gantt-modal-actions .btn-save {
    background-color: var(--gantt-primary);
    color: #fff;
}

.gantt-modal-actions .btn-save:hover {
    background-color: var(--gantt-primary-hover);
}

.gantt-modal-actions .btn-cancel {
    background-color: var(--gantt-border-light);
    color: var(--gantt-text);
}

.gantt-modal-actions .btn-cancel:hover {
    background-color: var(--gantt-border);
}

.gantt-modal-actions .btn-delete {
    background-color: var(--gantt-danger);
    color: #fff;
    margin-right: auto;
}

.gantt-modal-actions .btn-delete:hover {
    background-color: var(--gantt-danger-hover);
}

/* ================================== */
/* CRITICAL PATH LEGEND               */
/* ================================== */

.gantt-legend {
    display: flex;
    align-items: center;
    gap: 14px;
    font-size: 12px;
    color: var(--gantt-text-light);
    padding: 6px 0;
}

.gantt-legend-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.gantt-legend-color {
    width: 12px;
    height: 12px;
    border-radius: 3px;
}

/* ================================== */
/* EXPORT DROPDOWN                    */
/* ================================== */

.gantt-export-dropdown {
    position: relative;
    display: inline-block;
}

.gantt-export-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    background: var(--gantt-bg);
    border: 1px solid var(--gantt-border);
    border-radius: var(--gantt-radius);
    box-shadow: var(--gantt-shadow-lg);
    min-width: 180px;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: all var(--gantt-transition);
}

.gantt-export-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.gantt-export-menu-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    font-size: 13px;
    cursor: pointer;
    transition: background var(--gantt-transition);
    border: none;
    background: none;
    width: 100%;
    font-family: inherit;
    color: var(--gantt-text);
    text-align: left;
}

.gantt-export-menu-item:hover {
    background: var(--gantt-border-light);
}

.gantt-export-menu-item:first-child {
    border-radius: var(--gantt-radius) var(--gantt-radius) 0 0;
}

.gantt-export-menu-item:last-child {
    border-radius: 0 0 var(--gantt-radius) var(--gantt-radius);
}

/* ================================== */
/* AI PANEL                           */
/* ================================== */

.gantt-ai-panel {
    position: fixed;
    right: -420px;
    top: 0;
    width: 400px;
    height: 100vh;
    background: var(--gantt-bg);
    border-left: 1px solid var(--gantt-border);
    box-shadow: -4px 0 20px rgba(0,0,0,0.1);
    z-index: 500;
    display: flex;
    flex-direction: column;
    transition: right 0.3s ease;
}

.gantt-ai-panel.open {
    right: 0;
}

.gantt-ai-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--gantt-border);
    flex-shrink: 0;
}

.gantt-ai-header h3 {
    margin: 0;
    font-size: 15px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 6px;
}

.gantt-ai-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    color: var(--gantt-text-light);
    padding: 4px;
    border-radius: 4px;
    transition: all var(--gantt-transition);
}

.gantt-ai-close:hover {
    background: var(--gantt-border-light);
    color: var(--gantt-text);
}

.gantt-ai-settings {
    padding: 10px 16px;
    border-bottom: 1px solid var(--gantt-border);
    flex-shrink: 0;
}

.gantt-ai-key-input {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--gantt-border);
    border-radius: 6px;
    font-family: inherit;
    font-size: 12px;
}

.gantt-ai-key-status {
    font-size: 11px;
    margin-top: 4px;
    color: var(--gantt-text-muted);
}

.gantt-ai-key-status.connected {
    color: var(--gantt-success);
}

.gantt-ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.gantt-ai-msg {
    max-width: 90%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.5;
    word-break: break-word;
}

.gantt-ai-msg.user {
    align-self: flex-end;
    background: var(--gantt-primary);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.gantt-ai-msg.assistant {
    align-self: flex-start;
    background: var(--gantt-border-light);
    color: var(--gantt-text);
    border-bottom-left-radius: 4px;
}

.gantt-ai-msg.system {
    align-self: center;
    background: transparent;
    color: var(--gantt-text-muted);
    font-size: 12px;
    text-align: center;
    padding: 4px;
}

.gantt-ai-msg pre {
    background: rgba(0,0,0,0.1);
    padding: 8px;
    border-radius: 6px;
    overflow-x: auto;
    font-size: 12px;
    margin: 6px 0;
}

.gantt-ai-quick-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 10px 16px;
    border-top: 1px solid var(--gantt-border);
    flex-shrink: 0;
}

.gantt-ai-quick-btn {
    font-family: inherit;
    font-size: 11px;
    padding: 5px 10px;
    border: 1px solid var(--gantt-border);
    border-radius: 14px;
    cursor: pointer;
    background: var(--gantt-bg);
    color: var(--gantt-text-light);
    transition: all var(--gantt-transition);
}

.gantt-ai-quick-btn:hover {
    background: var(--gantt-border-light);
    color: var(--gantt-text);
    border-color: var(--gantt-primary);
}

.gantt-ai-input-area {
    display: flex;
    gap: 8px;
    padding: 12px 16px;
    border-top: 1px solid var(--gantt-border);
    flex-shrink: 0;
}

.gantt-ai-input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--gantt-border);
    border-radius: 8px;
    font-family: inherit;
    font-size: 13px;
    resize: none;
    min-height: 38px;
    max-height: 80px;
}

.gantt-ai-input:focus {
    outline: none;
    border-color: var(--gantt-primary);
}

.gantt-ai-send {
    padding: 8px 14px;
    background: var(--gantt-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    font-size: 13px;
    transition: background var(--gantt-transition);
    flex-shrink: 0;
}

.gantt-ai-send:hover {
    background: var(--gantt-primary-hover);
}

.gantt-ai-send:disabled {
    background: var(--gantt-border);
    cursor: not-allowed;
}

/* --- AI typing indicator --- */
.gantt-ai-typing {
    display: flex;
    gap: 4px;
    align-items: center;
    padding: 8px 14px;
}

.gantt-ai-typing span {
    width: 6px;
    height: 6px;
    background: var(--gantt-text-muted);
    border-radius: 50%;
    animation: ganttTyping 1.2s infinite;
}

.gantt-ai-typing span:nth-child(2) { animation-delay: 0.2s; }
.gantt-ai-typing span:nth-child(3) { animation-delay: 0.4s; }

@keyframes ganttTyping {
    0%, 60%, 100% { opacity: 0.3; transform: translateY(0); }
    30% { opacity: 1; transform: translateY(-3px); }
}

/* ================================== */
/* STATUS BAR (BOTTOM)                */
/* ================================== */

.gantt-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 12px;
    background: var(--gantt-header-bg);
    border-top: 1px solid var(--gantt-border);
    font-size: 12px;
    color: var(--gantt-text-light);
    flex-shrink: 0;
}

.gantt-status-bar-left,
.gantt-status-bar-right {
    display: flex;
    align-items: center;
    gap: 14px;
}

.gantt-status-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ================================== */
/* DARK THEME                         */
/* ================================== */

.gantt-wrapper.theme-dark {
    --gantt-primary: #60a5fa;
    --gantt-primary-hover: #93bbfd;
    --gantt-secondary: #9ca3af;
    --gantt-danger: #f87171;
    --gantt-danger-hover: #fca5a5;
    --gantt-success: #34d399;
    --gantt-warning: #fbbf24;
    --gantt-task-bar: #3b82f6;
    --gantt-task-bar-progress: #60a5fa;
    --gantt-critical-bar: #ef4444;
    --gantt-critical-bar-progress: #f87171;
    --gantt-milestone: #a78bfa;
    --gantt-border: #374151;
    --gantt-border-light: #1f2937;
    --gantt-header-bg: #111827;
    --gantt-row-hover: #1e293b;
    --gantt-row-selected: #1e3a5f;
    --gantt-text: #e5e7eb;
    --gantt-text-light: #9ca3af;
    --gantt-text-muted: #6b7280;
    --gantt-bg: #0f172a;
    --gantt-bg-alt: #111827;
    --gantt-today-line: #ef4444;
    --gantt-dependency: #fbbf24;
}

.gantt-wrapper.theme-dark .gantt-modal {
    background: #1e293b;
}

.gantt-wrapper.theme-dark .gantt-modal-content input,
.gantt-wrapper.theme-dark .gantt-modal-content select,
.gantt-wrapper.theme-dark .gantt-modal-content textarea {
    background: #0f172a;
    color: var(--gantt-text);
    border-color: var(--gantt-border);
}

.gantt-wrapper.theme-dark .gantt-ai-panel {
    background: #0f172a;
}

.gantt-wrapper.theme-dark .gantt-ai-msg.assistant {
    background: #1e293b;
}

.gantt-wrapper.theme-dark .gantt-bar-tooltip {
    background: #374151;
}

.gantt-wrapper.theme-dark .gantt-bar-tooltip::after {
    border-top-color: #374151;
}

.gantt-wrapper.theme-dark .gantt-export-menu {
    background: #1e293b;
    border-color: var(--gantt-border);
}

.gantt-wrapper.theme-dark .gantt-today-line::before {
    background: rgba(239,68,68,0.2);
}

/* ================================== */
/* MIDNIGHT THEME                     */
/* ================================== */

.gantt-wrapper.theme-midnight {
    --gantt-primary: #818cf8;
    --gantt-primary-hover: #a5b4fc;
    --gantt-secondary: #94a3b8;
    --gantt-danger: #fb7185;
    --gantt-danger-hover: #fda4af;
    --gantt-success: #34d399;
    --gantt-warning: #fbbf24;
    --gantt-task-bar: #6366f1;
    --gantt-task-bar-progress: #818cf8;
    --gantt-critical-bar: #f43e5c;
    --gantt-critical-bar-progress: #fb7185;
    --gantt-milestone: #c084fc;
    --gantt-border: #334155;
    --gantt-border-light: #1e293b;
    --gantt-header-bg: #0f172a;
    --gantt-row-hover: #1e293b;
    --gantt-row-selected: #312e81;
    --gantt-text: #e2e8f0;
    --gantt-text-light: #94a3b8;
    --gantt-text-muted: #64748b;
    --gantt-bg: #020617;
    --gantt-bg-alt: #0f172a;
    --gantt-today-line: #fb7185;
    --gantt-dependency: #fbbf24;
}

.gantt-wrapper.theme-midnight .gantt-modal {
    background: #1e293b;
}

.gantt-wrapper.theme-midnight .gantt-modal-content input,
.gantt-wrapper.theme-midnight .gantt-modal-content select,
.gantt-wrapper.theme-midnight .gantt-modal-content textarea {
    background: #020617;
    color: var(--gantt-text);
    border-color: var(--gantt-border);
}

.gantt-wrapper.theme-midnight .gantt-ai-panel {
    background: #020617;
}

/* ================================== */
/* BLUE THEME                         */
/* ================================== */

.gantt-wrapper.theme-blue {
    --gantt-primary: #2563eb;
    --gantt-primary-hover: #1d4ed8;
    --gantt-task-bar: #3b82f6;
    --gantt-task-bar-progress: #1d4ed8;
    --gantt-border: #bfdbfe;
    --gantt-border-light: #eff6ff;
    --gantt-header-bg: #eff6ff;
    --gantt-row-hover: #dbeafe;
    --gantt-row-selected: #bfdbfe;
    --gantt-bg: #ffffff;
    --gantt-bg-alt: #f0f7ff;
}

/* ================================== */
/* GREEN THEME                        */
/* ================================== */

.gantt-wrapper.theme-green {
    --gantt-primary: #059669;
    --gantt-primary-hover: #047857;
    --gantt-task-bar: #10b981;
    --gantt-task-bar-progress: #059669;
    --gantt-border: #a7f3d0;
    --gantt-border-light: #ecfdf5;
    --gantt-header-bg: #ecfdf5;
    --gantt-row-hover: #d1fae5;
    --gantt-row-selected: #a7f3d0;
    --gantt-bg: #ffffff;
    --gantt-bg-alt: #f0fdf4;
}

/* ================================== */
/* NARROW THEME (compact overlay)     */
/* ================================== */

.gantt-wrapper.theme-narrow .gantt-grid-cell {
    padding: 0 6px;
    font-size: 12px;
}

.gantt-wrapper.theme-narrow .gantt-action-btn {
    padding: 3px 4px;
    font-size: 12px;
}

.gantt-wrapper.theme-narrow .gantt-bar-label {
    font-size: 11px;
    left: 6px;
    right: 6px;
}

.gantt-wrapper.theme-narrow .gantt-top-toolbar {
    padding: 6px 10px;
}

.gantt-wrapper.theme-narrow .gantt-toolbar-btn,
.gantt-wrapper.theme-narrow .gantt-view-tab {
    padding: 4px 10px;
    font-size: 12px;
}

/* ================================== */
/* LOADING OVERLAY                    */
/* ================================== */

.gantt-loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(2px);
}

.gantt-wrapper.theme-dark .gantt-loading-overlay,
.gantt-wrapper.theme-midnight .gantt-loading-overlay {
    background: rgba(15,23,42,0.7);
}

.gantt-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--gantt-border);
    border-top-color: var(--gantt-primary);
    border-radius: 50%;
    animation: ganttSpin 0.8s linear infinite;
}

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

/* ================================== */
/* FULLSCREEN                         */
/* ================================== */

.gantt-wrapper.fullscreen {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: var(--gantt-bg);
}

.gantt-wrapper.fullscreen .gantt-container {
    height: calc(100vh - 80px);
    border-radius: 0;
}

/* ================================== */
/* PRINT STYLES                       */
/* ================================== */

@media print {
    .gantt-wrapper {
        position: static !important;
    }
    .gantt-top-toolbar,
    .gantt-ai-panel,
    .gantt-task-actions,
    .gantt-status-bar {
        display: none !important;
    }
    .gantt-container {
        height: auto !important;
        overflow: visible !important;
        box-shadow: none !important;
        border: 1px solid #ccc !important;
    }
    .gantt-chart-container {
        overflow: visible !important;
    }
    .gantt-today-line::before {
        display: none;
    }
}

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

@media (max-width: 768px) {
    .gantt-top-toolbar {
        padding: 8px;
        gap: 6px;
    }

    .gantt-toolbar-left,
    .gantt-toolbar-right {
        gap: 4px;
    }

    .gantt-toolbar-btn {
        padding: 5px 8px;
        font-size: 12px;
    }

    .gantt-view-tab {
        padding: 5px 10px;
        font-size: 12px;
    }

    .gantt-grid-container {
        width: 300px;
        min-width: 180px;
    }

    .gantt-ai-panel {
        width: 100%;
        right: -100%;
    }

    .gantt-container {
        height: 60vh;
    }
}

@media (max-width: 480px) {
    .gantt-grid-container {
        width: 200px;
        min-width: 150px;
    }

    .gantt-zoom-controls,
    .gantt-legend {
        display: none;
    }
}