/* ==========================================================================
   nessvyuh - GATE Official Scientific Calculator Replica Stylesheet
   ========================================================================== */

.calc-modal-card {
  max-width: 480px;
  background: var(--surface-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-floating);
  overflow: hidden;
}

.calc-container {
  padding: 1.1rem;
  background: var(--bg-secondary);
}

.calc-display-wrap {
  background: var(--surface-card);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-bottom: 0.85rem;
  text-align: right;
  min-height: 65px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.calc-formula-history {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  min-height: 1.1rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.calc-current-input {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
  overflow-x: auto;
  white-space: nowrap;
}

.calc-controls-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.calc-angle-toggle {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.calc-angle-label {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  cursor: pointer;
}

.calc-memory-indicator {
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-terracotta);
  visibility: hidden;
}

.calc-memory-indicator.active {
  visibility: visible;
}

/* Keypad Grid */
.calc-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.35rem;
}

.calc-key {
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-primary);
  font-family: var(--font-mono);
  transition: all var(--transition-fast);
  user-select: none;
}

.calc-key:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.calc-key:active {
  transform: translateY(1px);
}

.calc-key.fn {
  background: var(--bg-secondary);
  color: var(--text-secondary);
  font-size: 0.75rem;
}

.calc-key.num {
  font-weight: 600;
  background: var(--surface-card);
}

.calc-key.op {
  background: var(--bg-secondary);
  color: var(--accent-terracotta);
  font-weight: 600;
}

.calc-key.clear {
  color: var(--color-danger);
  background: var(--color-danger-bg);
  border-color: var(--color-danger-border);
}

.calc-key.equals {
  background: var(--accent-terracotta);
  color: #FFFFFF;
  border-color: var(--accent-terracotta);
  font-weight: 700;
}

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