JSFiddle - React, Tailwind, and code Playground

HTML

<button class="btn">Кнопка</button>

SCSS

@mixin beveled-corners($bg, $tl:0, $tr:$tl, $br:$tl, $bl:$tr) {
  background:
  linear-gradient(135deg, transparent $tl, $bg 0) top left,
  linear-gradient(225deg, transparent $tr, $bg 0) top right,
  linear-gradient(-45deg, transparent $br, $bg 0) bottom right,
  linear-gradient(45deg, transparent $bl, $bg 0) bottom left;
  background-size: 50% 50%;
  background-repeat: no-repeat;
}

.btn {
  position: relative;
  text-decoration: none;
  color: #000;
  padding: 13px 38px;
  @include beveled-corners(#fff, 0, 10px, 0, 10px);
  text-align: center;
  letter-spacing: 0.9px;
  transition: 0.2s ease-out;
  cursor: pointer;
  border: none;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  justify-content: center;
  align-items: center;
  vertical-align: middle;
  z-index: 1;

  &::before {
    content: "";
    position: absolute;
    top: -2px;
    left: -2px;
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    @include beveled-corners(#999, 0, 10px, 0, 10px);
    z-index: -2;
    pointer-events: none;
    transition: 0.2s ease-in-out;
  }

  &::after {
    content: "";
    position: absolute;
    top: -2px;
    left: -2px;
    width: calc(100% + 4px);
    height: calc(100% + 4px);
    @include beveled-corners(#ff9800, 0, 10px, 0, 10px);
    z-index: -1;
    opacity: 0;
    pointer-events: none;
    transition: 0.2s ease-in-out;
  }

  &:hover, &:active{
    color: #fff;
    
    &::after { 
      opacity: 1;
    }
  }
}