body {
  font-family: sans-serif;
  max-width: 600px;
  margin: 2rem auto;
  padding: 1rem;
  background-color: #f9f9f9;
}

label {
  display: block;
  margin-top: 1rem;
  font-weight: bold;
}

select {
  width: 100%;
  padding: 0.5rem;
  font-size: 1rem;
  border: 1px solid #aaa;
  border-radius: 4px;
  color: black;
}

.row {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
}

.column {
  flex: 1;
}

.controls {
  margin-top: 1rem;
  text-align: center;
}

button {
  padding: 0.5rem 1rem;
  font-size: 1rem;
  background-color: #004080;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  margin: 0 0.25rem;
}

button:hover {
  background-color: #0059b3;
}

.p1 {
  margin: 0.3rem 0;
  font-size: 1rem;
}

.mode-indicator {
  margin-top: 1rem;
  font-weight: bold;
  text-align: center;
  font-size: 1.1rem;
}

@media (max-width: 600px) {
  body {
    padding: 1rem;
  }

  .row {
    flex-direction: column;
  }

  button {
    width: 100%;
    margin: 0.3rem 0;
    font-size: 1.1rem;
  }

  .mode-indicator {
    font-size: 1.3rem;
  }

  select {
    font-size: 1.2rem;
  }

  label {
    font-size: 1.1rem;
  }

  h2 {
    font-size: 1.5rem;
    text-align: center;
  }
}