/* Contenedor de columnas */
.row {
  display: flex;
  flex-wrap: wrap;
  gap: 2%;
  margin-bottom: 35px;
}

/* Reset legacy */
.row > * { margin: 0; }

/* Mapear tus clases a anchos modernos (flex-basis) */
.one_half        { flex: 0 0 48%; }
.one_half_last   { flex: 0 0 48%; margin-left: auto; }

.one_third       { flex: 0 0 30%; }
.one_third_last  { flex: 0 0 30%; margin-left: auto; }

.one_fourth      { flex: 0 0 22.8%; }
.one_fourth_last { flex: 0 0 22.8%; margin-left: auto; }

.one_fifth       { flex: 0 0 18.4%; }
.one_fifth_last  { flex: 0 0 18.4%; margin-left: auto; }

.one_sixth       { flex: 0 0 15%; }
.one_sixth_last  { flex: 0 0 15%; margin-left: auto; }

.two_thirds      { flex: 0 0 66%; }
.two_thirds_last { flex: 0 0 32%; margin-left: auto; }

.three_fourth        { flex: 0 0 75.5%; }
.three_fourth_last   { flex: 0 0 22.5%; margin-left: auto; }

/* Responsive: apilar en pantallas estrechas */
@media (max-width: 900px) {
  .one_half, .one_half_last,
  .one_third, .one_third_last,
  .one_fourth, .one_fourth_last,
  .one_fifth, .one_fifth_last,
  .one_sixth, .one_sixth_last,
  .two_thirds, .two_thirds_last,
  .three_fourth, .three_fourth_last {
    flex: 0 0 100%;
  }
}

/* Si aún tienes maquetación antigua con floats, neutralízalos */
.one_half, .one_half_last,
.one_third, .one_third_last,
.one_fourth, .one_fourth_last,
.one_fifth, .one_fifth_last,
.one_sixth, .one_sixth_last,
.two_thirds, .two_thirds_last,
.three_fourth, .three_fourth_last {
  float: none !important;
}