.calc-display-wrap { margin-bottom: 12px; }
.calc-expr { min-height: 1.2em; font-size: 0.85rem; color: var(--text-muted); font-family: var(--font-mono); word-break: break-all; }
.calc-display { font-size: 1.5rem; font-family: var(--font-mono); text-align: right; font-weight: 700; }
.calc-modes { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-bottom: 12px; }
.calc-pad {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
}
.calc-pad button {
  min-height: 48px;
  font-weight: 600;
  font-size: 0.95rem;
}
.calc-history { list-style: none; max-height: 160px; overflow: auto; font-family: var(--font-mono); font-size: 0.85rem; }
.calc-history li { padding: 6px 0; border-bottom: 1px solid var(--border); }
@media (max-width: 480px) {
  .calc-pad { grid-template-columns: repeat(4, 1fr); }
}