.sub{
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: aliceblue;
    position: relative;
}
form{
    visibility: visible;
}
.sub form{
    width: 37.5rem;
    text-align: center;
}

.error-txt{
    font-size: .9375rem;
    color: red;
    text-align: left;
    margin:-0.3125rem 0 .75rem;
    display: none;
}

form .input-box{
    display: flex;
    justify-content: space-between;
padding: 1.25rem;
}

.input-field{
    width: fit-content;
}

.item{
width: 100%;
padding: 1.125rem;
background: transparent;
border:.125rem solid #3498db;
outline: none;
border-radius: .375rem;
font-size: 1rem;
color: #000;
margin: .75rem auto;
}

.error{
    border-color:rgb(255, 63, 63);
}

.error .error-txt{
   display: block;
}

.textarea-field .item{
    resize: none;
}

form button{
    padding: .75rem 2rem;
    background: #3498db;
    border: none;
    outline: none;
    border-radius: .375rem;
    box-shadow:0 0 .625rem #3498db;
    font-size: 1rem;
     color: #333;
    letter-spacing: .0625rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1.25rem;
    transition: 0.5s;
}
form button:hover{
    box-shadow: none;
}

.popup{
    display: flex;
    justify-content: center;
   max-width: 20rem;
   width:100%;
   max-height: 20rem;
   height: 100%;
   background: #fff;
   border-radius: .375rem;
   position: fixed;
   top: 10%;
   left: 50%;
   transform: translate(-50%,50%) scale(1);
   text-align: center;
   border: dotted #3498db;
    padding:  0 1.875rem 1.875rem;
    color: #333;
visibility:hidden;
}
.child {
    position: fixed;
    top: 30%;
    left: 17%;
  }

.view_popup{
    visibility: visible;
    transform: translate(-50%,50%) scale(1);
}
.inform{
    visibility: hidden;
}

.popup button{
    padding: .75rem 2rem;
    background: #3498db;
    border: none;
    outline: none;
    border-radius: .375rem;
    box-shadow:0 0 .625rem #3498db;
    font-size: 1rem;
     color: #333;
    letter-spacing: .0625rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 1.25rem;
    transition: 0.5s;
}

.popup button:hover{
    box-shadow: none;
}

.op{
    display:block;
    background: #fff;
    height:100%;
    width: 100%;
    opacity:0.5;
}

@media(max-width:692px) {
    .item{
        width: 70%;
    }

    label{
        font-size: small;
    }
}

@media(max-width:386px){
    .popup{
       max-width: 15rem;
    }
    .child {
        position: fixed;
        top: 30%;
        left: 11%;
      }
      label{
        font-size: 0.625rem;
    }
    
}