.activity-card {
  font-family: Inter, system-ui, Arial, sans-serif;
  background: #ffffff;
  border-radius: 14px;
  padding: 20px 20px 20px 0;
  flex: 1 1 200px;
  min-width: 180px;
  display: flex;
  align-items: center;
  gap: 0;
  overflow: hidden;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  position: relative;
}
.activity-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.10);
}
.activity-card-accent {
  width: 5px;
  align-self: stretch;
  border-radius: 14px 0 0 14px;
  flex-shrink: 0;
  margin-right: 18px;
}
.activity-icon-bubble {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
  margin-right: 14px;
}
.activity-count {
  font-size: 28px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
  letter-spacing: -0.5px;
}
.activity-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 2px;
}
.activity-timeframe {
  font-size: 11px;
  font-weight: 400;
  color: #94A3B8;
}