.tile-calculator-box {
  max-width: 420px;
  padding: 20px;
  border-radius: 12px;
  background: #f9f9f9;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  font-family: Arial, sans-serif;
}

.tile-calculator-box label {
  display: block;
  margin-top: 10px;
  font-weight: bold;
}

.tile-calculator-box input,
.tile-calculator-box select {
  width: 100%;
  padding: 8px;
  margin-top: 5px;
}

.tile-calculator-box button {
  margin-top: 15px;
  width: 100%;
  padding: 10px;
  background: #25D366;
  color: #fff;
  border: none;
  font-size: 16px;
  border-radius: 6px;
  cursor: pointer;
}

.result-box {
  margin-top: 15px;
  padding: 12px;
  background: #fff;
  border-radius: 6px;
  display: none;
}