seahub/frontend/src/css/files-activities.css

.activity-details {
  text-decoration: underline;
  cursor: pointer;
}
.activity-details:hover {
  color: #333;
}
.mobile-activity-time {
  display: inline-block;
  margin-bottom: .2em;
}

.cur-activity-modifiers {
  margin-left: -0.5rem;
}

.cur-activity-modifiers:hover {
  background: #f5f5f5;
  cursor: pointer;
}

.cur-activity-modifiers .toggle-icon {
  color: #999;
}

.activity-modifier-selector-container {
  width: 320px;
  background: #fff;
  border: 1px solid #e8e8e8;
  margin-top: 2px;
  z-index: 2;
}

.activity-selected-modifiers {
  min-height: 2rem;
  background: #f6f6f6;
  border-bottom: 1px solid #dde2ea;
  line-height: 1;
}

.activity-selected-modifier {
  display: inline-flex;
  align-items: center;
  margin-right: 10px;
  padding: 0 8px 0 2px;
  border-radius: 10px;
  background: #eaeaea;
}

.unselect-activity-user {
  color: #909090;
  cursor: pointer;
}

.unselect-activity-user:hover {
  color: #5a5a5a;
}

.activity-user-list {
  min-height: 4rem;
}

.activity-user-item {
  cursor: pointer;
}

.activity-user-item:hover {
  background: #f5f5f5;
}