/* =========================================================================
   MwGanttChart — mw-gc-* prefix
   ========================================================================= */

/* NOTE: Root container */
.mw-gc-root {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--mud-palette-lines-default);
    border-radius: var(--mud-default-borderradius);
    overflow: hidden;
    background: var(--mud-palette-surface);
    font-size: 0.8125rem;
}

.mw-gc-empty {
    padding: 24px;
    text-align: center;
    color: var(--mud-palette-text-secondary);
}

/* NOTE: Toolbar */
.mw-gc-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    border-bottom: 1px solid var(--mud-palette-lines-default);
    background: var(--mud-palette-background);
    flex-shrink: 0;
}

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

/* NOTE: Chart area (label column + timeline) */
.mw-gc-chart {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 200px;
}

/* NOTE: Fixed label column */
.mw-gc-label-column {
    flex-shrink: 0;
    width: 180px;
    border-right: 1px solid var(--mud-palette-lines-default);
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--mud-palette-surface);
    scrollbar-width: none;
}

.mw-gc-label-column::-webkit-scrollbar {
    display: none;
}

.mw-gc-label-header {
    height: 40px;
    display: flex;
    align-items: center;
    padding: 0 12px;
    font-weight: 600;
    border-bottom: 1px solid var(--mud-palette-lines-default);
    background: var(--mud-palette-background);
    position: sticky;
    top: 0;
    z-index: 2;
}

.mw-gc-group-header {
    height: 36px;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 0 8px;
    cursor: pointer;
    font-weight: 600;
    color: var(--mud-palette-text-primary);
    background: var(--mud-palette-background-grey);
    border-bottom: 1px solid var(--mud-palette-lines-default);
    user-select: none;
    transition: background 0.15s;
}

.mw-gc-group-header:hover {
    background: var(--mud-palette-action-default-hover);
}

.mw-gc-group-header-collapsed {
    opacity: 0.8;
}

.mw-gc-row-label {
    height: 36px;
    display: flex;
    align-items: center;
    padding: 0 12px 0 28px;
    border-bottom: 1px solid var(--mud-palette-lines-inputs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--mud-palette-text-secondary);
}

/* NOTE: Scrollable timeline wrapper */
.mw-gc-timeline-wrapper {
    flex: 1;
    overflow: auto;
    position: relative;
}

.mw-gc-timeline {
    position: relative;
    min-height: 100%;
}

/* NOTE: Time axis header */
.mw-gc-time-axis {
    position: sticky;
    top: 0;
    z-index: 3;
    background: var(--mud-palette-background);
    border-bottom: 1px solid var(--mud-palette-lines-default);
}

.mw-gc-time-axis-row {
    display: flex;
    position: relative;
    height: 40px;
}

.mw-gc-time-axis-dates {
    height: 20px;
    font-weight: 600;
}

.mw-gc-time-axis-hours {
    height: 20px;
}

.mw-gc-time-axis-cell {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    border-right: 1px solid var(--mud-palette-lines-inputs);
    color: var(--mud-palette-text-secondary);
    font-size: 0.75rem;
    box-sizing: border-box;
    overflow: hidden;
    white-space: nowrap;
}

/* NOTE: Grid lines */
.mw-gc-grid-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--mud-palette-lines-inputs);
    pointer-events: none;
    z-index: 0;
}

/* NOTE: Today line */
.mw-gc-today-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--mud-palette-primary);
    opacity: 0.7;
    pointer-events: none;
    z-index: 2;
}

/* NOTE: Task bars */
.mw-gc-bar {
    position: absolute;
    display: flex;
    align-items: center;
    border-radius: 4px;
    background: var(--mud-palette-primary);
    color: var(--mud-palette-primary-text);
    cursor: pointer;
    z-index: 1;
    transition: box-shadow 0.15s;
    overflow: hidden;
    box-sizing: border-box;
}

.mw-gc-bar:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    z-index: 4;
}

.mw-gc-bar:focus-visible {
    outline: 2px solid var(--mud-palette-primary);
    outline-offset: 2px;
    z-index: 4;
}

.mw-gc-bar-content {
    flex: 1;
    padding: 0 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.75rem;
    pointer-events: none;
}

/* NOTE: Status color modifiers */
.mw-gc-bar-pending {
    background: var(--mud-palette-info);
    color: var(--mud-palette-info-text);
}

.mw-gc-bar-in-progress {
    background: var(--mud-palette-warning);
    color: var(--mud-palette-warning-text);
}

.mw-gc-bar-done {
    background: var(--mud-palette-success);
    color: var(--mud-palette-success-text);
}

.mw-gc-bar-blocked {
    background: var(--mud-palette-error);
    color: var(--mud-palette-error-text);
}

/* NOTE: Critical path */
.mw-gc-bar-critical {
    outline: 2px solid var(--mud-palette-error);
    outline-offset: -1px;
}

/* NOTE: Drag state modifiers */
.mw-gc-bar-dragging {
    opacity: 0.8;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
    z-index: 10;
}

.mw-gc-bar-resizing {
    z-index: 10;
}

/* NOTE: Resize handles */
.mw-gc-resize-handle {
    position: absolute;
    top: 0;
    width: 8px;
    height: 100%;
    cursor: col-resize;
    z-index: 5;
}

.mw-gc-resize-start {
    left: 0;
}

.mw-gc-resize-end {
    right: 0;
}

.mw-gc-resize-handle:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* NOTE: SVG arrow overlay */
.mw-gc-arrow-overlay {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
    z-index: 1;
    overflow: visible;
}

.mw-gc-arrow {
    stroke: var(--mud-palette-text-secondary);
    stroke-width: 1.5;
    fill: none;
}

.mw-gc-arrow-critical {
    stroke: var(--mud-palette-error);
    stroke-width: 2.5;
}

.mw-gc-arrowhead-fill {
    fill: var(--mud-palette-text-secondary);
}

.mw-gc-arrowhead-critical-fill {
    fill: var(--mud-palette-error);
}