SASS?

#modal-box-login{
  position: fixed;
  display: none;
  width: 100vw;
  height: 100vh;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0,0,0,0.5);
  z-index: 100;
  cursor: pointer;
    .modal-content-overlay{
        @include linearGradient(#2c3e50, #34495e);
        @include roundedCorners(30);

        width: 80vw;
        height: 75vh;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        cursor:default;
        overflow: hidden;
            .modal-content-wrapper{
                width: calc(100% + 30px);
                height: calc(100% + 30px);
                padding: 0 1rem;
                font-size: 2rem;
                text-align: justify;
                overflow: scroll !important;
                position: relative;

                .modal-text-wrapper{
                display: flex;
                flex-direction: row;
                justify-content: space-around;
                flex-wrap: wrap;
                }

                h1{
                    color: white;
                    font-family:'Montserrat', sans-serif;
                    display: block;
                    position: sticky;
                    top: 0;
                    background: #2c3e50;
                    width: 100%;
                    border-bottom: 2px solid rgba(255,255,255,0.5);
                    height: 1.5em;
                    text-transform: uppercase;
                    font-size: 1.5em;
                    -webkit-box-shadow: 0 8px 6px -6px black;
                   -moz-box-shadow: 0 8px 6px -6px black;
                   box-shadow: 0 8px 6px -6px black;
                }

                p{
                    color: white;
                    font-family:'Montserrat', sans-serif;
                    width: 27%;
                    font-size: 1.2rem;
                    padding: 1rem;
                    border: 1px solid red;
                }
            }
        }
}