.calc-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--bg-secondary);
}

.calc-display {
  padding: 16px 20px;
  text-align: right;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--separator);
}

.calc-expression {
  font-size: 13px;
  color: var(--text-secondary);
  min-height: 18px;
}

.calc-value {
  font-size: 32px;
  font-weight: 300;
  color: var(--text-primary);
  font-variant-numeric: tabular-nums;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calc-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  flex: 1;
  padding: 1px;
}

.calc-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: var(--bg-primary);
  color: var(--text-primary);
  border: none;
  cursor: pointer;
  transition: background 0.1s;
  user-select: none;
}

.calc-btn:hover {
  background: var(--bg-hover);
}

.calc-btn:active {
  background: var(--bg-tertiary);
}

.calc-btn.operator {
  background: var(--bg-secondary);
  font-weight: 600;
  color: var(--accent);
}

.calc-btn.operator:hover {
  background: var(--bg-tertiary);
}

.calc-btn.equals {
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}

.calc-btn.equals:hover {
  background: var(--accent-hover);
}

.calc-btn.clear {
  color: var(--danger);
  font-weight: 600;
}