webapp/src/components/_shared/DropArea/DropArea.module.scss

.DropArea {
  .field {
    border: 2px dashed rgb(38 56 217 / 30%);
    border-radius: 16px;
    color: #2638d9;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 500;
    padding: 24px;
    transition: background-color 0.3s ease-in-out;
    cursor: pointer;
    overflow: hidden;
    position: relative;

    .text {
      position: relative;
      z-index: 1;
    }

    &.active,
    &:hover {
      background-color: rgba(#2638d9, 0.3);

      &::after {
        content: '';
        top: 0;
        transform: translateX(100%);
        width: 100%;
        height: 100%;
        position: absolute;
        z-index: 0;
        animation: slide 1.8s infinite;
        background: linear-gradient(
          to right,
          rgba(#fff, 0) 0%,
          rgba(#fff, 0.8) 50%,
          rgb(128 186 232 / 0%) 99%,
          rgb(125 185 232 / 0%) 100%
        );
      }
    }
  }

  .description {
    @include font-size(1.2rem);

    margin-top: 1.6rem;
    text-align: center;
    color: var(--secondary-color);
  }

  .error {
    @include font-size(1.4rem);

    color: var(--danger-color);
    margin-top: 1.6rem;
    text-align: center;
    padding: 1rem;
  }

  &.square {
    .field {
      @include font-size(1.4rem);

      flex-direction: column;
      padding: 0;
      width: 228px;
      height: 228px;
      text-align: center;
    }

    .description {
      margin-top: 8px;
      opacity: 0.3;
      color: var(--default-color);
    }
  }
}

@keyframes slide {
  0% {
    transform: translateX(-100%);
  }

  100% {
    transform: translateX(100%);
  }
}