body {
  margin: 0;
}
.mask-border::before {
  content: '';
  width: 100%;
  height: 100vh;
  border: $line-primary $color-text-primary solid;
  position: fixed;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 8;
}
.wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
.main {
  flex-grow: 1;
  display: flex;
  margin: 0;
  padding: 0;
  justify-content: center;
}