.sliding-menu {
  position: relative;
  overflow: hidden;
  background-color: #F7F5F5; /* Aquí se cambió el color de fondo */
  text-align: left;
  font-size: 21px;
}
.sliding-menu__panel {
  position: absolute;
  top: 0;
  left: 100%;
  width: 100%;
}
.sliding-menu li {
  padding: 0;
  margin: 0;
  list-style: none;
}
.sliding-menu li a,
.sliding-menu li .sliding-menu__nav {
  display: block;
  padding: .8em 1em;
  text-align: left;
  font-size: 21px;
  line-height: 1.4em;
  color: #2D2E82;
  text-decoration: none;
  border-width: 0;
  width: 100%;
  background-color: transparent;
  -webkit-transition: color 250ms ease, background-color 250ms ease;
  -moz-transition: color 250ms ease, background-color 250ms ease;
  -o-transition: color 250ms ease, background-color 250ms ease;
  transition: color 250ms ease, background-color 250ms ease;
}
.sliding-menu li a:hover,
.sliding-menu li .sliding-menu__nav:hover {
  color: #fff;
  background-color: #333;
}
.sliding-menu .active a {
  color: #fff;
  background-color: #2D2E82;
}
.sliding-menu .sliding-menu__nav:before {
  float: right;
  margin-left: 1em;
  content: "\3009";
}
.sliding-menu .sliding-menu__back {
  color: #fff;
  background-color: #555;
  font-weight: bold;
}
.sliding-menu .sliding-menu__back:before {
  float: left;
  margin-right: 1em;
  content: "\3008";
}
.sliding-menu .sliding-menu__icon {
  margin-right: .4em;
}
.sliding-menu .sliding-menu__separator {
  margin: .4em 1em;
  border-top: 2px solid #555;
}