@keyframes spin {
    from {
      transform: rotate(0);
    }
    to{
      transform: rotate(359deg);
    }
  }

* {
    box-sizing: border-box;
  }
  
  body {
    min-height: 100vh;
    background-color: #1d2630;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    align-items: flex-start;
  }
  
  .spinner-box {
    width: 300px;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: transparent;
  }

  .circle-border {
    width: 150px;
    height: 150px;
    padding: 3px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: 50%;
    background: rgb(63,249,220);
    background: linear-gradient(0deg, rgba(63,249,220,0.1) 33%, rgba(63,249,220,1) 100%);
    animation: spin .8s linear 0s infinite;
  }
  
  .circle-core {
    width: 100%;
    height: 100%;
    background-color: #1d2630;
    border-radius: 50%;
  }