/* OUTLYR branding */

:root {
  --panel-light-width: 15px;
  --panel-light-level: 0.5;
}

.panel {
  position: relative;
  display: inline-block;
  /* Or block/flex depending on your layout */
  width: 100%;
  height: 100%;
}

.backlight {
  /* color */
  background: linear-gradient(150deg, var(--outlyr-yellow) 0%, var(--outlyr-silver) 50%);
  filter: blur(var(--panel-light-width));
  opacity: var(--panel-light-level);

  /* layout */
  width: 100%;
  height: 100%;
  position: absolute;
  /* Changed from relative */
  top: 0;
  left: 0;
  z-index: -1;
  /* Behind the panel */
}

.face {
  /* color */
  background-color: black;
  color: var(--outlyr-white);

  /* Layout */
  position: relative;
  z-index: 1;
  /* Above the backlight */
  margin: var(--panel-light-width);
  width: calc(100% - 2 * var(--panel-light-width));
  height: calc(100% - 2 * var(--panel-light-width));
  display: inline-block;
  padding: 2rem;

  /* Asymmetric Chamfer */
  clip-path: polygon(20px 0,
      0 10px,
      0 100%,
      calc(100% - 20px) 100%,
      100% calc(100% - 10px),
      100% 0);
}