.logo {
    max-width: 40px;
}
.nav-link {
    color: #ffffff !important;
    font-size: 16pt !important;
}
.main {
    width: 100vw;
    height: calc(100vh);
    background: url('../images/mainback.png');
    background-size: cover;
    background-repeat: no-repeat;
    background-attachment: fixed;
}
#study {
    background-color: #404040;
}

.btn1 {
  // this css is purely to place the button squarely in the center of this demo, remove to place it wherever it might need to go in your actual code
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
}

@keyframes TransitioningBackground {
  0% {
    background-position: 1% 0%;
  }
  50% {
    background-position: 99% 100%;
  }
  100% {
    background-position: 1% 0%;
  }
}

#rectangle {
    width: 1895px;
    height: 870px;
    background: rgba(0, 0, 0, 0.8);
}

.txt11{
color: rgba(277, 277, 277, 277);
}


div {
  text-align: center;
}
body {
  background: #ebcacb;
}
.closing-button {
  text-decoration: none;
  display: inline-block;
  margin: 10px;
  color: white;
  box-shadow: 0 0 0 2px white;
  padding: 20px 0;
  width: 150px;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 3px;
  position: relative;
  overflow: hidden;
}
.closing-button span {
  font-family: 'Montserrat', sans-serif;
  position: relative;
  z-index: 5;
}
.closing-button:before, .closing-button:after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  right: 0;
  left: 0;
}
.closing-button:before {
  transform: translateX(-100%);
  background: white;
  transition: transform .3s cubic-bezier(.55, .055, .675, .19);
}
.closing-button:after {
  background: #413ad5;
  transform: translateX(100%);
  transition: transform .3s cubic-bezier(.16, .73, .58, .62) .3s;
}
.closing-button:hover:before, .closing-button:hover:after {
  transform: translateX(0);
}