CSSのプロパティーの書き順（なんとなくやってるやつ）

style.css

.class {
  pointer-events: none;

  box-sizing: border-box;

  z-index: 2147483647;
  position: fixed;/*fixedやめろ*/
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;

  clear: both;
  float: left;

  display: flex;
  justify-content: center;
  align-items: center;

  margin: auto;
  padding: 0;

  border: 1px solid currentColor;
  border-collapse: collapse;
  border-spacing: 0;

  width: 100vw;
  height: 100vh;

  color: gold;
  font-family: sans-serif;/*漢は黙ってsans-serif*/
  font-size: 10px;/*ピコ文字やめろ*/
  font-weight: bold;
  font-style: italic;
  line-height: 1;
  text-align: center;
  vertical-align: middle;
  text-decoration: underline;

  background: url('path/to/image.jpg') no-repeat 0 0;
  background-clip: padding-box;
  background-size: contain;
  background-blend-mode: overlay;

  box-shadow: 0 0 5px 10px rgba(0,0,0, 0.3);

  outline: 0 none;/*やめろ*/

  mix-blend-mode: overlay;/*やめろ*/

  opacity: 0;/*やめろ*/

  transform: translate3d(0,0,0);
  backface-visibility: visible;

  overflow: hidden;

  transition: all 0.5s linear;
  animation: tkg 0.5s linear;
}