*, :before, :after {
  box-sizing: border-box;
  margin: 0;
  transition: 0.4s;
}

body {
  background: #616161 url(../img/bg.jpg) center/cover no-repeat;
  height: 100vh;
  overflow: hidden;
  color: #FFF;
}

.modal {
  height: 400px;
  width: 650px;
  margin: auto;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  transition: .4s, box-shadow .3s .4s;
}
.modal.hidden {
  box-shadow: none;
  transition: .4s, box-shadow 0s;
  opacity: 0;
  visibility: hidden;
}
.modal.hidden .form {
  top: 100%;
}
.modal.hidden .invite {
  top: -100%;
}
.modal.hidden .invite .close {
  height: 0;
  width: 0;
  top: 0;
  right: 0;
}

.form, .invite {
  background: rgba(71, 71, 71, 0.8);
  width: 50%;
  height: 100%;
  padding: 25px;
  position: absolute;
  top: 0;
  left: 0;
}

input {
  background: rgba(255, 255, 255, 0.15);
  width: 100%;
  padding: 8px;
  margin: 15px 0;
  border: none;
  border-radius: 3px;
  outline: none;
  color: #FFF;
  font-size: 20px;
}
input:-webkit-autofill {
  -webkit-box-shadow: 0 0 0px 500px #7a7a7a inset;
  -webkit-text-fill-color: #FFF;
}

label {
  color: #FB5781;
}

button {
  background: linear-gradient(-45deg, #f857a6, #ff5858);
  padding: 10px 20px;
  border: none;
  border-radius: 21px;
  outline: none;
  overflow: hidden;
  position: absolute;
  bottom: 30px;
  left: 50%;
  color: #FFF;
  font-size: 18px;
  cursor: pointer;
  transform: translateX(-50%);
}
button:hover:before {
  left: 110%;
  transition: .3s;
}
button:before {
  content: '';
  background: rgba(255, 255, 255, 0.3);
  height: 100%;
  width: 65px;
  position: absolute;
  top: 0;
  left: -100%;
  transform: skew(-45deg);
  transition: 0s;
}

.invite {
  background: linear-gradient(-45deg, #f857a6, #ff5858);
  left: 50%;
}


.nope {
  background: #474747;
  padding: 10px 15px;
  border-radius: 3px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.25);
  position: absolute;
  bottom: 30px;
  left: 50%;
  font-size: 12px;
  white-space: nowrap;
  cursor: pointer;
  transform: translateX(-50%);
}
.nope:hover {
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.25);
  transform: translateX(-50%);
}

.close {
  background: #474747;
  height: 30px;
  width: 30px;
  border: 3px solid #FFF;
  border-radius: 50%;
  position: absolute;
  top: -15px;
  right: -15px;
  cursor: pointer;
  transition: .4s .3s;
}
.close:before, .close:after {
  content: '';
  background: #FFF;
  height: 80%;
  width: 3px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) rotate(-45deg);
}
.close:after {
  transform: translate(-50%, -50%) rotate(45deg);
}

.open {
  background: linear-gradient(-45deg, #f857a6, #ff5858);
  height: 45px;
  width: 150px;
  padding: 10px 20px;
  margin: auto;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  font-size: 20px;
  text-align: center;
  white-space: nowrap;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
}
.open.active {
  opacity: 1;
  visibility: visible;
}
.open:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}