* {box-sizing: border-box;}

.col-1 {width: 8.33%;}
.col-2 {width: 16.66%;}
.col-3 {width: 25%;}
.col-4 {width: 33.33%;}
.col-5 {width: 41.66%;}
.col-6 {width: 50%;}
.col-7 {width: 58.33%;}
.col-8 {width: 66.66%;}
.col-9 {width: 75%;}
.col-10 {width: 83.33%;}
.col-11 {width: 91.66%;}
.col-12 {width: 100%;}

.row::after {
    content: "";
    clear: both;
    display: table;
}

.back-drop{
    width:100%; 
    height:100%; 
    background: rgba(0, 0, 0, 0.5); 
    position:absolute; 
    top:0; 
    right:0; 
    z-index:10000
}

.loader {
    border: 16px solid #f3f3f3; /* Light grey */
    border-top: 16px solid #3498db; /* Blue */
    border-radius: 50%;
    width: 10vh;
    height: 10vh;
    animation: spin 2s linear infinite;
    margin: auto;
    margin-top: 40vh;
  }
  
  @keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
  }