body {
  font-family: Arial, sans-serif;
  background: #f7f9fb;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 40px 20px;
  min-height: 100vh;
}

.converter-container {
  background: white;
  border-radius: 20px;
  padding: 30px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
  max-width: 420px;
  width: 100%;
}

h1 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  text-align: center;
}

.converter input {
  width: 100%;
  padding: 10px;
  font-size: 1rem;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 8px;
}

.unit-selectors {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 15px;
}

select, button {
  padding: 10px;
  font-size: 1rem;
  border-radius: 8px;
  border: 1px solid #ccc;
}

button {
  background-color: #e6e6e6;
  cursor: pointer;
}

.result {
  font-size: 1.2rem;
  font-weight: bold;
  text-align: center;
}