/* ============================================
   BASIC-CALCULATOR.CSS
   Estilos para la calculadora básica.
   ============================================ */

/* Contenedor del display */
.calc-display {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  text-align: right;
  font-size: 2.2rem;
  font-weight: 500;
  margin-bottom: 16px;
  word-break: break-word;
  min-height: 70px;
  color: var(--color-text);
  transition:
    background-color var(--transition),
    border-color var(--transition);
}

/* Grid de botones */
.calculator-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

/* Estilo base de botón */
.calc-btn {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 16px 0;
  border-radius: 60px;
  font-size: 1.5rem;
  font-weight: 600;
  text-align: center;
  cursor: pointer;
  color: var(--color-text);
  transition:
    background-color var(--transition),
    transform 0.1s ease,
    box-shadow 0.1s ease;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

/* Hover/active para todos */
.calc-btn:hover {
  filter: brightness(0.95);
}

.calc-btn:active {
  transform: scale(0.96);
}

/* Botones de operadores */
.calc-btn.operator {
  background-color: var(--color-secondary);
  color: #1f2937;
  border: none;
}

/* Botón igual */
.calc-btn.equal {
  background-color: var(--color-primary);
  color: #1f2937;
  border: none;
}

/* Botón de clear */
.calc-btn.clear {
  background-color: var(--color-bg);
  border-color: var(--color-error);
  color: var(--color-error);
}

/* Sección de historial */
.history-section {
  margin-top: 20px;
}

.history-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text);
}

.history-list {
  list-style: none;
  padding: 0;
  margin: 0;
  max-height: 200px;
  overflow-y: auto;
}

.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 12px;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text);
}

.history-item:last-child {
  border-bottom: none;
}

.history-expression {
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

.history-result {
  font-weight: 600;
}

.history-delete {
  background: none;
  border: none;
  color: var(--color-error);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background-color var(--transition);
}

.history-delete:hover {
  background-color: rgba(248, 113, 113, 0.1);
}

.clear-history-btn {
  margin-top: 12px;
  background: none;
  border: 1px solid var(--color-border);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.85rem;
  cursor: pointer;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.clear-history-btn:hover {
  background-color: var(--color-surface);
  color: var(--color-text);
}

/* Botón que ocupa 2 columnas */
.calc-btn.span-2 {
  grid-column: span 2;
}

/* Botón de retroceso */
.calc-btn.backspace {
  font-size: 1.2rem;
  font-weight: 600;
}

/* Ajuste para que los símbolos se vean bien */
.calc-btn.operator {
  font-size: 1.3rem;
}