/* Calculator Styles */
.calculator {
  padding: 5rem 0;
  background-color: var(--dark-color);
}

.calculator-container {
  display: flex;
  justify-content: center;
  align-items: center;
  margin-top: 2rem;
}

.calculator-form {
  width: 100%;
  max-width: 350px;
  background-color: #333;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.5);
  overflow: hidden;
  padding: 0;
  font-family: "Roboto Mono", monospace;
}

.calculator-display {
  background-color: #1a1a1a;
  color: #fff;
  padding: 20px;
  text-align: right;
  font-size: 1.5rem;
  border-bottom: 2px solid #444;
}

.calculator-display .metal-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.9rem;
  color: #aaa;
  margin-bottom: 5px;
}

.calculator-display .weight-display {
  font-size: 1.2rem;
  color: #ddd;
  margin-bottom: 10px;
}

.calculator-display .result-display {
  font-size: 1.8rem;
  font-weight: bold;
  color: var(--secondary-color);
}

.calculator-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background-color: #444;
}

.calculator-button {
  background-color: #555;
  border: none;
  color: white;
  font-size: 1.2rem;
  padding: 15px 0;
  cursor: pointer;
  transition: background-color 0.2s;
}

.calculator-button:hover {
  background-color: #666;
}

.calculator-button:active {
  background-color: #777;
  transform: scale(0.95);
  box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.2);
}

.calculator-button.operator {
  background-color: #666;
}

.calculator-button.equals {
  background-color: var(--secondary-color);
  grid-column: span 2;
  font-weight: bold;
  font-size: 1rem;
}

.calculator-button.equals:hover {
  background-color: #ff5a4c;
}

.calculator-button.clear {
  background-color: #888;
}

.calculator-button.metal-select {
  background-color: var(--primary-color);
  grid-column: span 4;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px;
}

.metal-select select {
  background-color: #333;
  color: white;
  border: 1px solid #555;
  padding: 5px 10px;
  border-radius: 4px;
  font-size: 1rem;
  width: 100%;
}

.calculator-result {
  background-color: #1a1a1a;
  color: var(--secondary-color);
  padding: 15px;
  text-align: center;
  font-weight: bold;
  font-size: 1.2rem;
  border-top: 2px solid #444;
}

@media screen and (max-width: 992px) {
  .calculator-form {
    max-width: 400px;
  }

  .calculator-button {
    padding: 14px 0;
    font-size: 1.1rem;
  }
}

@media screen and (max-width: 768px) {
  .calculator-form {
    max-width: 100%;
    width: 100%;
  }

  .calculator-button {
    padding: 12px 0;
    font-size: 1rem;
  }

  .calculator-display {
    padding: 15px;
  }

  .calculator-display .result-display {
    font-size: 1.6rem;
  }
}

@media screen and (max-width: 480px) {
  .calculator-form {
    max-width: 100%;
  }

  .calculator-display {
    padding: 12px;
  }

  .calculator-display .metal-info {
    font-size: 0.8rem;
  }

  .calculator-display .weight-display {
    font-size: 1rem;
  }

  .calculator-display .result-display {
    font-size: 1.4rem;
  }

  .calculator-button {
    padding: 10px 0;
    font-size: 0.9rem;
  }

  .calculator-button.equals {
    font-size: 0.9rem;
  }

  .calculator-result {
    padding: 12px;
    font-size: 1rem;
  }
}