Practice/_src/admin/scss/common/_layout.scss

html {
  font-size:12px;
}
body {
  height:100vh;
  min-width:1200px;
  &.iframe {
    min-width:0;
  }
}
$header-height : 0px;
$nav-height : 44px;

#nav {
  .nav-menu {
    flex:1;
    @include display-flex;
    align-items: center;

    .logo {
      width:50px;
      height:44px;
      border-color:transparent !important;
      background-color:#354d91 !important;
      color:#fff;
      padding:13px;
      text-align:center;
      &:after {
        content:'';
      }
      i {
        margin-right:0;
      }
    }

    &,
    ul {
      list-style:none;
      padding:0;
      margin:0;
      background-color:#282828;

      a,
      span {
        font-size:12px;
        padding:13px;
        user-select: none;
        color:#b4b4b4;
        display:block;
      }

      li {
        display:block;
        white-space: nowrap;

        &.open,
        &:hover {
          > a,
          > span {
            text-decoration: none;
            cursor:pointer;
          }
        }

        &.divider {
          height:1px;
          border:0 none;
          background-color:#ddd;
          margin:3px 0;
        }
      }
    }

    > li {
      display:block;
      position:relative;

      > a,
      > span{
        white-space: nowrap;
        word-wrap:normal;
        padding-right:30px;
        position:relative;

        i {
          margin-right:5px;
        }
        &:hover {
          color:#fff;
        }

        &:after {
          content:'\f107';
          font-family: "Font Awesome 5 Pro" !important;
          position:absolute;
          right:10px;
          top:50%;
          transform: translateY(-50%);
        }
      }

      &.active {
        > span {
          color:#fff;
        }
      }

      > ul {
        display:none;
        position:absolute;
        top:44px;
        left:-1px;
        width:auto;
        border:1px solid #a0a0a0;
        border-top:0 none;
        min-width:calc(100% + 2px);
        padding:2px;
        box-shadow: 0 6px 12px rgba(0,0,0,.175);

        a,
        span {
          padding:6px 10px;
          color:#282828;
          position:relative;

          .badge {
            position:absolute;
            top:50%;
            transform:translateY(-50%);
            right:5px;
            background-color: #c7163a;
            color: #fff;
            padding: 2px 5px;
          }

          &:hover {
            background-color:#354D91;
            color:#fff;
          }
        }

        > li {
          position:relative;

          > ul {
            display:none;
            position:absolute;
            top:0;
            left:calc(100% + 1px);
            border:1px solid #a0a0a0;
            min-width:100%;
            background-color:#fff;
            box-shadow: 0 6px 12px rgba(0,0,0,.175);
          }

          >span {
            padding-right:15px;

            &:after {
              content:'\f105';
              font-family: "Font Awesome 5 Pro" !important;
              position:absolute;
              right:5px;
              top:50%;
              transform: translateY(-50%);
            }
          }

          &:hover {
            > a, span {
              background-color:#354D91;
              color:#fff;

            }
            > ul {
              display:block;
            }
          }
        }
      }

      &.open {
        > a, span {
          color:#282828;
          background-color:#fff;;
          z-index:3;
        }
        > ul {
          display:block;
          background-color:#fff;
        }
      }
    }

  }
}

#contents {
  padding:30px;
  height: calc(100vh - #{$header-height} - #{$nav-height});
  overflow-y:auto;
}

.page-header {
  margin-bottom:10px;
  border-bottom: 1px solid #ddd;

  .iframe & {
    margin-top:0;
  }

  .page-title {
    font-size:18px;
    font-weight:500;
    color:#282828;
    line-height:1em;

    small {
      color:#767676;
      font-size:12px;
      margin-left:15px;
    }
  }
}

.box {
  position:relative;
  padding:30px;
  background:#fff;
  border-radius:4px;
  border:1px solid #e6e6e6;

  .box-header {
    border-bottom:1px solid #e6e6e6;
    margin-bottom:15px;
    margin-top:-30px;
    position:relative;
    height:57px;

    @include clear-fix-after();

    .box-title {
      float:left;
      color:$brand-primary;
      font-size:15px;
      font-weight:500;
      padding:18px 0;

      small {
        color:#767676;
        font-weight:400;
        font-size:13px;
      }
    }

    .box-action {
      float:right;
      @include display-flex();
      height:57px;
      align-items: center;
    }
  }
}

.frame-content {
  padding:15px;
}