body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f5f5f5;
}

.container {
  max-width: 420px;
  margin: auto;
  padding: 20px;
}

h1 {
  text-align: center;
  margin-bottom: 30px;
}

input {
  width: 100%;
  padding: 16px;
  font-size: 22px;
  border-radius: 12px;
  border: 1px solid #ccc;
  box-sizing: border-box;
}

.buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 20px;
}

button {
  padding: 14px;
  font-size: 18px;
  border: none;
  border-radius: 12px;
  background: #2e7d32;
  color: white;
  cursor: pointer;
}

button:active {
  transform: scale(0.98);
}

.vat-toggle {
  margin-top: 20px;
}

.result {
  background: white;
  margin-top: 30px;
  padding: 25px;
  border-radius: 16px;
  text-align: center;
}

.result span {
  font-size: 20px;
}

.result h2 {
  font-size: 42px;
  margin-top: 10px;
}