wekan/client/components/gantt/gantt.css

/* Gantt chart cell background colors for Received, Start, Due, End (matching cardDetails) */
.ganttview-received {
  background-color: #dbdbdb !important;
  color: #000 !important;
  font-size: 18px !important;
  font-weight: bold !important;
}
.ganttview-start {
  background-color: #90ee90 !important;
  color: #000 !important;
  font-size: 18px !important;
  font-weight: bold !important;
}
.ganttview-due {
  background-color: #ffd700 !important;
  color: #000 !important;
  font-size: 18px !important;
  font-weight: bold !important;
}
.ganttview-end {
  background-color: #ffb3b3 !important;
  color: #000 !important;
  font-size: 18px !important;
  font-weight: bold !important;
}
/* Gantt View Styles */

.gantt-view {
  width: 100%;
  height: auto;
  overflow: visible;
  background-color: #fff;
}

.gantt-view.swimlane {
  background-color: #fff;
  padding: 10px;
}

.gantt-container {
  overflow-x: auto;
  overflow-y: visible;
  background-color: #fff;
  display: block;
  width: 100%;
}

.gantt-container table,
.gantt-table {
  border-collapse: collapse;
  width: 100%;
  min-width: 800px;
  border: 2px solid #666;
  font-family: sans-serif;

  background-color: #fff;
}

.gantt-container thead {
  background-color: #e8e8e8;
  border-bottom: 2px solid #666;
  font-weight: bold;
  position: sticky;
  top: 0;
  z-index: 10;
}

.gantt-container thead th,
.gantt-container thead tr > td:first-child {
  border-right: 2px solid #666;
  padding: 4px; /* half of 8px */
  width: 100px; /* half of 200px */
  text-align: left;
  font-weight: bold;
  background-color: #e8e8e8;
  min-width: 100px; /* half of 200px */
}

.gantt-container thead td {
  border-right: 1px solid #999;
  padding: 2px 1px; /* half */
  text-align: center;
  background-color: #f5f5f5;

  min-width: 15px; /* half of 30px */
  font-weight: bold;
  height: auto;
  line-height: 1.2;
  white-space: normal;
  word-break: break-word;
}

.gantt-container tbody tr {
  border-bottom: 1px solid #999;
  height: 32px;
}

.gantt-container tbody tr:hover {
  background-color: #f9f9f9;
}

.gantt-container tbody tr:hover td {
  background-color: #f9f9f9 !important;
}

.gantt-container tbody td {
  border-right: 1px solid #ccc;
  padding: 1px; /* half */
  text-align: center;
  min-width: 15px; /* half of 30px */
  height: 32px;
  vertical-align: middle;
  line-height: 28px;
  background-color: #ffffff;

  font-weight: bold;
}

.gantt-container tbody td:nth-child(even) {
  background-color: #fafafa;
}

.gantt-container tbody td:first-child {
  border-right: 2px solid #666;
  padding: 4px; /* half of 8px */
  font-weight: 500;
  cursor: pointer;
  background-color: #fafafa !important;
  text-align: left;
  width: 100px; /* half of 200px */
  min-width: 100px; /* half of 200px */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  height: auto;
  line-height: normal;
}

.gantt-container tbody td:first-child:hover {
  background-color: #f0f0f0 !important;
  text-decoration: underline;
}

.js-gantt-task-cell {
  cursor: pointer;
}

.js-gantt-date-icon {
  cursor: pointer;
}

.gantt-container .ganttview-weekend {
  background-color: #efefef;
}

.gantt-container .ganttview-today {
  background-color: #fcf8e3;
  border-right: 2px solid #ffb347;
}

/* Task bar styling - VERY VISIBLE */
.gantt-container tbody td.ganttview-block {
  background-color: #4CAF50 !important;
  color: #fff !important;

  font-weight: bold !important;
  padding: 2px !important;
  border-radius: 2px;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .gantt-container table {

  }

  .gantt-container thead td {
    min-width: 20px;
    padding: 2px;
  }

  .gantt-container tbody td {
    min-width: 20px;
    padding: 1px;
    height: 20px;
  }

  .gantt-container tbody td:first-child {
    width: 100px;

  }
}

/* Print styles */
@media print {
  .gantt-container {
    overflow: visible;
  }

  .gantt-container table {
    page-break-inside: avoid;
  }
}