AdminLTE/build/scss/_layout.scss

/*
 * Core: General Layout Style
 * -------------------------
 */
html,
body,
.wrapper {
  min-height: 100%;
  overflow-x: hidden;
}

.wrapper {
  position: relative;

  .layout-boxed & {
    box-shadow: 0 0 10px rgba(0, 0, 0, .3);
    &,
    &:before {
      margin: 0 auto;
      max-width: $boxed-layout-max-width;
    }
  }
}

.content-wrapper,
.main-footer,
.main-header {
  @include media-breakpoint-up(md) {
    @include transition(margin-left $transition-speed $transition-fn);

    margin-left: $sidebar-width;
    z-index: 3000;

    .sidebar-collapse & {
      margin-left: 0;
    }
  }

  @include media-breakpoint-down(md) {
    &,
    &:before {
      margin-left: 0;
    }
  }
}

.content-wrapper {
  background: $main-bg;

  > .content {
    padding: $content-padding-y $content-padding-x;
  }
}

.main-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;

  &,
  &:before {
    $local-sidebar-transition: margin-left $transition-speed $transition-fn, width $transition-speed $transition-fn;
    @include transition($local-sidebar-transition);
    width: $sidebar-width;
  }

  .sidebar-collapse & {
    &,
    &:before {
      margin-left: -$sidebar-width;
    }
  }

  @include media-breakpoint-down(md) {
    &,
    &:before {
      box-shadow: none!important;
      margin-left: -$sidebar-width;
    }

    .sidebar-open & {
      &,
      &:before {
        margin-left: 0;
      }
    }
  }
}

.main-footer {
  padding: $main-footer-padding;
  color: #555;
  border-top: $main-footer-border-top;
  background: $main-footer-bg;
}

.content-header {
  padding: 15px $content-padding-x;

  h1 {
    font-size: 1.8rem;
    margin: 0;
  }
  .breadcrumb {
    margin-bottom: 0;
    padding: 0;
    background: transparent;
    line-height: 1.8rem;
  }
}

.hold-transition {
  .content-wrapper,
  .main-header,
  .main-footer {
    transition: none!important;
  }
}