* {
  box-sizing: border-box;
  font-family: sans-serif;
}

body {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background: #f7f7f7;
}

.container {
  width: 95%;
  max-width: 400px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.input-group, .output-group {
  display: flex;
  flex-direction: column;
}

label {
  font-size: 0.9rem;
  margin-bottom: 4px;
}

input {
  padding: 8px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}

button {
  padding: 10px;
  font-size: 1rem;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}

#calcular {
  background: #4CAF50;
  color: white;
}

#reset {
  background: #f44336;
  color: white;
}

@media (max-width: 400px) {
  body {
    padding: 10px;
  }
}