body{
    background-color: blueviolet;
    display: flex;
    justify-content: center;
    align-items: center;
    padding-top: 100px;
    flex-direction: column;
    gap: 30px;
 
}

.card{
    text-align: center;
    border: 2px solid white;
    border-radius: 15px;
    width: 250px;
    height: 250px;
    color: white;

}

#btn{
    width: 30px;
    height: 30px;
    left: 50px;
    right: 50px;
    color: black;

}

.hidden{
    display: none;
}

.lod{
    background-color: #000000bc;
    position: fixed;
    width: 100%;
    height: 100vh;
}



/* HTML: <div class="loader"></div> */
.loader {
    width: 50px;
    padding: 8px;
    aspect-ratio: 1;
    border-radius: 50%;
    background: #25b09b;
    --_m: 
      conic-gradient(#0000 10%,#000),
      linear-gradient(#000 0 0) content-box;
    -webkit-mask: var(--_m);
            mask: var(--_m);
    -webkit-mask-composite: source-out;
            mask-composite: subtract;
    animation: l3 1s infinite linear;
    z-index:1;
  }
  @keyframes l3 {to{transform: rotate(1turn)}}