.activity-wrap {
  padding: 16px 18px 20px;
  overflow-x: auto;
}

.activity-matrix {
  min-width: 620px;
}

.matrix-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 4px;
  font-size: 0.8rem;
}

.matrix-table th {
  padding: 6px;
  border: 0;
  background: transparent;
  color: var(--muted);
  text-align: center;
  font-size: 0.68rem;
}

.matrix-table th.matrix-row-label {
  min-width: 82px;
  text-align: left;
  color: var(--text-soft);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}

.matrix-table td {
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  padding: 10px 8px;
  text-align: center;
  color: var(--text-soft);
  font-weight: 650;
  font-variant-numeric: tabular-nums;
}

.matrix-table tbody tr:hover {
  background: transparent;
}

.heat-0 {
  background: rgba(148, 163, 184, 0.04);
  color: var(--muted) !important;
}

.heat-1 {
  background: rgba(56, 189, 248, 0.10);
}

.heat-2 {
  background: rgba(56, 189, 248, 0.18);
}

.heat-3 {
  background: rgba(56, 189, 248, 0.27);
  color: #e0f2fe !important;
}

.heat-4 {
  background: rgba(56, 189, 248, 0.38);
  color: #f0f9ff !important;
}

@media (max-width: 620px) {
  .activity-wrap {
    padding: 12px;
  }
}