/* ============================
   Gantt Chart — Scope Timeline
   ============================ */

/* Main container */
.gantt-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    border: 1px solid var(--border-docs, rgba(255, 255, 255, 0.06));
    border-radius: 12px;
    margin: 24px 40px;
    overflow: hidden;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
    min-height: 0;
}

/* Header */
.gantt-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color, rgba(255, 255, 255, 0.06));
    flex-shrink: 0;
}

.gantt-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

/* Body: sidebar + timeline */
.gantt-body {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

/* Left sidebar (task labels, sticky) */
.gantt-sidebar {
    width: 220px;
    min-width: 220px;
    border-right: 2px solid var(--border-color, rgba(255, 255, 255, 0.06));
    overflow-y: hidden;
    flex-shrink: 0;
    background: var(--bg-primary);
    z-index: 2;
}

.gantt-sidebar-header {
    height: 52px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-bottom: 2px solid var(--border-color, rgba(255, 255, 255, 0.06));
    background: var(--bg-secondary, #1a1a2e);
}

.gantt-project-group {
    border-bottom: 1px solid var(--border-color, rgba(255, 255, 255, 0.06));
}

.gantt-project-label {
    height: 32px;
    line-height: 32px;
    padding: 0 16px;
    font-weight: 600;
    font-size: 12px;
    color: var(--text-primary);
    background: var(--bg-secondary, #1a1a2e);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.gantt-task-label {
    display: flex;
    align-items: center;
    height: 36px;
    line-height: 36px;
    padding: 0 16px 0 12px;
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.gantt-task-label.milestone-label {
    font-style: italic;
}

/* Right scrollable timeline */
.gantt-timeline-scroll {
    flex: 1;
    overflow-x: auto;
    overflow-y: auto;
    position: relative;
    min-width: 0;
    cursor: grab;
    user-select: none;
    -webkit-user-select: none;
}

.gantt-timeline-scroll:active {
    cursor: grabbing;
}

/* Timeline header (date columns) */
.gantt-timeline-header {
    position: sticky;
    top: 0;
    z-index: 999;
    background: var(--bg-secondary, #1a1a2e);
    border-bottom: 2px solid var(--border-color, rgba(255, 255, 255, 0.06));
    min-width: fit-content;
    height: 52px;
    overflow: hidden;
}

.gantt-header-months {
    display: flex;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.gantt-month-cell {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-primary);
    padding: 6px 0;
    text-align: center;
    border-right: 1px solid rgba(255, 255, 255, 0.04);
    white-space: nowrap;
    overflow: hidden;
}

.gantt-header-days {
    display: flex;
}

.gantt-date-cell {
    flex-shrink: 0;
    text-align: center;
    font-size: 10px;
    color: var(--text-secondary);
    padding: 4px 0;
    border-right: 1px solid rgba(255, 255, 255, 0.03);
    box-sizing: border-box;
}

.gantt-date-cell.weekend {
    background: rgba(255, 255, 255, 0.015);
    color: var(--text-disabled, #555);
}

.gantt-date-cell.today {
    color: var(--accent, #6366f1);
    font-weight: 700;
    background: rgba(99, 102, 241, 0.08);
}

/* Timeline body */
.gantt-timeline-body {
    position: relative;
    min-width: fit-content;
}

/* Grid lines (vertical, behind bars) */
.gantt-grid-lines {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
}

.gantt-grid-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 1px;
    background: rgba(255, 255, 255, 0.025);
}

.gantt-grid-line.weekend {
    background: rgba(255, 255, 255, 0.01);
    width: 2px;
}

/* Project rows section in timeline */
.gantt-project-rows {
    border-bottom: 1px solid var(--border-color, rgba(255, 255, 255, 0.06));
}

.gantt-project-row-header {
    height: 32px;
    background: var(--bg-secondary, #1a1a2e);
    position: relative;
}

/* Task row */
.gantt-row {
    height: 36px;
    position: relative;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    z-index: 1;
}

/* Bar (task with start + end) */
.gantt-bar {
    position: absolute;
    top: 6px;
    height: 24px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    padding: 0 8px;
    cursor: pointer;
    transition: opacity 0.15s, box-shadow 0.15s;
    min-width: 6px;
    opacity: 0.85;
    z-index: 1;
}

.gantt-bar:hover {
    opacity: 1;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    z-index: 2;
}

.gantt-bar-label {
    font-size: 11px;
    color: white;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.4);
    line-height: 1;
}

/* Milestone (single date) */
.gantt-milestone {
    position: absolute;
    top: 11px;
    width: 14px;
    height: 14px;
    transform: rotate(45deg);
    border: 2.5px solid;
    background: var(--bg-primary);
    cursor: pointer;
    margin-left: -7px;
    z-index: 1;
    transition: transform 0.15s;
}

.gantt-milestone:hover {
    transform: rotate(45deg) scale(1.2);
}

/* Today marker line */
.gantt-today-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--accent, #6366f1);
    z-index: 3;
    opacity: 0.7;
    pointer-events: none;
}

.gantt-today-label {
    position: absolute;
    top: -20px;
    left: -14px;
    font-size: 9px;
    font-weight: 700;
    color: var(--accent, #6366f1);
    white-space: nowrap;
}

/* Empty state */
.gantt-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 40px;
    color: var(--text-secondary);
    text-align: center;
    flex: 1;
}

.gantt-empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.gantt-empty-text {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 8px;
}

.gantt-empty-sub {
    font-size: 13px;
    color: var(--text-disabled, #6b7280);
}

/* Undated tasks section */
.gantt-undated {
    border-top: 2px solid var(--border-color, rgba(255, 255, 255, 0.06));
    padding: 16px 24px;
    flex-shrink: 0;
}

.gantt-undated-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.gantt-undated-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.gantt-undated-count {
    font-size: 11px;
    color: var(--text-disabled, #6b7280);
    background: var(--bg-tertiary, #1f2937);
    padding: 1px 8px;
    border-radius: 10px;
}

.gantt-undated-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    max-height: 160px;
    overflow-y: auto;
}

.gantt-undated-card {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    background: var(--bg-secondary, #1a1a2e);
    border: 1px solid var(--border-color, rgba(255, 255, 255, 0.06));
    border-radius: 6px;
    font-size: 12px;
    cursor: default;
    transition: border-color 0.15s;
}

.gantt-undated-card:hover {
    border-color: var(--text-secondary);
}

.gantt-undated-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.gantt-undated-name {
    color: var(--text-primary);
    white-space: nowrap;
}

.gantt-undated-project {
    color: var(--text-disabled, #6b7280);
    font-size: 11px;
    white-space: nowrap;
}

/* Collapsible project toggle */
.gantt-project-toggle-label {
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    user-select: none;
}

.gantt-project-toggle-label:hover {
    color: var(--accent, #6366f1);
}

.gantt-project-chevron {
    font-size: 10px;
    transition: transform 0.2s;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.gantt-project-chevron.collapsed {
    transform: rotate(-90deg);
}

/* Clickable task labels & undated cards */
.gantt-task-clickable {
    cursor: pointer;
}

.gantt-task-label.gantt-task-clickable:hover {
    color: var(--text-primary);
    background: var(--bg-secondary, #1a1a2e);
}

.gantt-undated-card.gantt-task-clickable {
    cursor: pointer;
}

.gantt-project-row-header {
    cursor: pointer;
}

.gantt-project-row-header:hover {
    opacity: 0.6;
}

/* ── Drag handles on gantt bars ── */
.gantt-bar-handle {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 8px;
    cursor: col-resize;
    z-index: 3;
    border-radius: 4px;
    transition: background 0.15s;
}

.gantt-bar-handle:hover,
.gantt-bar-handle:active {
    background: rgba(255, 255, 255, 0.25);
}

.gantt-bar-handle-left {
    left: 0;
    border-radius: 4px 0 0 4px;
}

.gantt-bar-handle-right {
    right: 0;
    border-radius: 0 4px 4px 0;
}

/* Drag tooltip (date preview) */
.gantt-drag-tooltip {
    position: absolute;
    bottom: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary, #0f0f23);
    color: var(--text-primary);
    border: 1px solid var(--accent, #6366f1);
    padding: 3px 8px;
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    white-space: nowrap;
    pointer-events: none;
    z-index: 10;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

/* While dragging, disable bar transitions and add outline */
.gantt-bar:active {
    transition: none;
}

/* ── Tag expand/collapse buttons on project header ── */
.gantt-tag-toggle-btns {
    margin-left: auto;
    display: flex;
    gap: 2px;
    flex-shrink: 0;
}

.gantt-tag-toggle-btn {
    background: none;
    border: 1px solid var(--border-color, rgba(255, 255, 255, 0.1));
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0 4px;
    border-radius: 3px;
    font-size: 11px;
    line-height: 18px;
    transition: background 0.15s, color 0.15s;
}

.gantt-tag-toggle-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* ── Tag sub-groups ── */
.gantt-tag-group {
    border-left: 2px solid var(--text-disabled, #555);
    margin-left: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.gantt-tag-label {
    height: 28px;
    line-height: 28px;
    padding: 0 10px;
    font-weight: 600;
    font-size: 11px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.02);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: 6px;
}

.gantt-tag-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.gantt-tag-row-header {
    height: 28px;
    position: relative;
    background: rgba(255, 255, 255, 0.02);
    cursor: pointer;
}

.gantt-tag-row-header:hover {
    background: rgba(255, 255, 255, 0.04);
}

.gantt-tag-rows {
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

/* ── Progress bars (on project + tag headers) ── */
.gantt-progress-bar {
    background-color: #dfdfdf;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    height: 14px;
    border-radius: 4px;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.gantt-progress-fill {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    border-radius: 7px;
    transition: width 0.3s ease;
}

.gantt-progress-label {
    position: relative;
    z-index: 1;
    font-size: 9px;
    font-weight: 700;
    color: white;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
    width: 100%;
    text-align: center;
    line-height: 14px;
}

/* Collapsed state — hide task rows in both sidebar and timeline */
.gantt-project-group.gantt-collapsed .gantt-task-label,
.gantt-project-group.gantt-collapsed .gantt-tag-group,
.gantt-project-rows.gantt-collapsed .gantt-row,
.gantt-project-rows.gantt-collapsed .gantt-tag-rows {
    display: none;
}

/* Tag collapsed state — hide tasks within tag group */
.gantt-tag-group.gantt-tag-collapsed .gantt-task-label {
    display: none;
}

.gantt-tag-rows.gantt-tag-collapsed .gantt-row {
    display: none;
}

/* Task name truncation inside flex label */
.gantt-task-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

/* Comment button on gantt task labels */
.gantt-comment-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-right: 2px;
    opacity: 0;
    cursor: pointer;
    transition: opacity 0.15s;
    border-radius: 3px;
}

.gantt-comment-btn.has-comments {
    opacity: 1;
}

.gantt-task-label:hover .gantt-comment-btn {
    opacity: 1;
}

.gantt-comment-btn:hover {
    background: rgba(255, 255, 255, 0.08);
}

.gantt-comment-icon {
    font-size: 14px;
    line-height: 1;
}

.gantt-comment-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 16px;
    height: 15px;
    padding: 0 4px;
    border-radius: 8px;
    background: var(--accent);
    color: white;
    font-size: 9px;
    font-weight: 600;
}