dark.css

.button-watch.background--light {
    &:before {
        background: transparent;
        color: transparent;
    }
    
    &:hover {
        background: inherit;
        color: inherit;
        
        &:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            height: 100%;
            width: 100%;
            background: #fff;
            opacity: 0.1;
            border-radius: 25px;
        }
    }
  }
  
  .button-watch.background--dark {
    &:before {
        background: transparent;
        color: transparent;
    }
    
    &:hover {
        background: inherit;
        color: inherit;
        
        &:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            height: 100%;
            width: 100%;
            background: #000;
            opacity: 0.1;
            border-radius: 25px;
        }
    }
  }