.site-main-layout {
  display: grid;
  grid-template-columns: 20% 60% 20%;
  width: 100%;
  margin: 0;
  padding: 0;
}

.site-sidebar-left,
.site-sidebar-right,
.site-content {
  margin: 0;
  padding: 0;
}

.site-main-layout {
  display: grid;
  grid-template-columns: 20% 60% 20%;
  width: 100%;
  margin: 0;
  padding: 0;
}

.site-content {
  width: 95%;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .site-main-layout {
    grid-template-columns: 100%;
  }
  .site-sidebar-left,
  .site-sidebar-right {
    display: none;
  }
  .site-content {
    width: 100%;
  }
}