.colwidth {
    width: 20%;
}

.error { color: red; }
/* HTML: <div class="loader"></div> */
.loader-spin {
    width: 50px;
    aspect-ratio: 1;
    display: grid;
    border-radius: 50%;
    background:
      linear-gradient(0deg ,rgb(0 0 0/50%) 30%,#0000 0 70%,rgb(0 0 0/100%) 0) 50%/8% 100%,
      linear-gradient(90deg,rgb(0 0 0/25%) 30%,#0000 0 70%,rgb(0 0 0/75% ) 0) 50%/100% 8%;
    background-repeat: no-repeat;
    animation: l23 1s infinite steps(12);
    margin-left: 50%;
    margin-top: 50px;
    margin-bottom: 50px;
  }
  .loader-spin::before,
  .loader-spin::after {
     content: "";
     grid-area: 1/1;
     border-radius: 50%;
     background: inherit;
     opacity: 0.915;
     transform: rotate(30deg);
  }
  .loader-spin::after {
     opacity: 0.83;
     transform: rotate(60deg);
  }
  @keyframes l23 {
    100% {transform: rotate(1turn)}
  }