.lesson-demonstration[hidden] {
  display: none;
}

.lesson-demonstration {
  margin: 22px 0;
  padding: 18px;
  border: 1px solid #d7e5f7;
  border-radius: 16px;
  background: linear-gradient(120deg, #f5f9ff, #ffffff);
}

.demonstration-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.demonstration-heading h3 {
  margin: 4px 0 0;
  font-size: 18px;
}

.demonstration-badge {
  padding: 6px 9px;
  border-radius: 999px;
  color: #2368d7;
  background: #e9f2ff;
  font-size: 10px;
  font-weight: 800;
}

.demonstration-instrument {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 15px 0;
  padding: 12px 14px;
  border-radius: 13px;
  background: #ffffff;
  box-shadow: 0 6px 18px rgb(18 36 69 / 7%);
}

.demonstration-icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: #eef4ff;
  font-size: 21px;
}

.demonstration-instrument > span:last-child {
  display: grid;
  gap: 2px;
}

.demonstration-instrument small,
.demonstration-status {
  color: #667085;
  font-size: 12px;
}

.demonstration-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.demonstration-button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 17px;
  border: 1px solid #2368d7;
  border-radius: 12px;
  color: #ffffff;
  background: linear-gradient(145deg, #3479e8, #2368d7);
  box-shadow: 0 9px 20px rgb(35 104 215 / 20%);
  font-weight: 800;
}

.demonstration-button:disabled {
  cursor: wait;
  opacity: 0.58;
}

.demonstration-status {
  margin: 12px 0 0;
}