.spinner-dual-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.4);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
  }
  
  .spinner-dual {
    width: 64px;
    height: 64px;
    display: inline-block;
    position: relative;
  }
  
  .spinner-dual div {
    position: absolute;
    width: 48px;
    height: 48px;
    margin: 8px;
    border: 4px solid #00faba;
    border-color: #00faba transparent transparent transparent;
    border-radius: 50%;
    animation: spinner-dual 1.2s linear infinite;
    box-sizing: border-box;
  }
  
  .spinner-dual div:nth-child(2) {
    animation-delay: -0.6s;
  }
  
  @keyframes spinner-dual {
    0%   { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }