* {
  box-sizing: border-box;
}

body,
html {
  width: 100%;
  height: 100%;
  padding: 0;
  margin: 0;
}

body {
  background: #ffffff;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 1) 50%,
    rgb(208, 214, 218) 96%
  );
}
b-x {
  display: flex;
}

b-x[center] {
  justify-content: center;
}
b-x[middle] {
  align-items: center;
}