.rutgeerts-group {
  margin-bottom: 2.5em;
  padding: 1.2em 1em 1em 1em;
  background: #f8fafc;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.03);
  border: 1px solid #e3e8ee;
  position: relative;
  text-align: center;
}
.option-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.7em;
  align-items: center;
}
.rutgeerts-btn {
  margin: 0.2em 0;
  padding: 0.5em 1.2em;
  border-radius: 5px;
  border: 1px solid #bcd;
  background: #f4f8fb;
  cursor: pointer;
  font-size: 1em;
  transition: background 0.2s, border 0.2s;
  min-width: 220px;
  text-align: center;
}
.rutgeerts-btn.active {
  background: #b6e0fe;
  border-color: #3399cc;
  font-weight: bold;
  color: #155a8a;
}
.resultado-rutgeerts {
  background: #f4f4f4;
  color: #222;
  font-size: 1.3em;
  font-weight: 500;
  text-align: center;
  border-radius: 8px;
  padding: 1em 0.5em;
  margin: 1.5em auto 1em auto;
  max-width: 400px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.04);
  letter-spacing: 0.01em;
}