.group {
  position: relative;
}

.form {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -ms-flex-direction: column;
  flex-direction: column;
  border: 1px solid white;
  padding: 120px 40px;
  padding-top: 60px;
  padding-bottom: 90px;
  padding-right: 40px;
  padding-left: 40px;
  background-color: black;
  border-radius: 20px;
  position: relative;
}

.form p {
  padding-bottom: 20px;
  font-size: 24px;
  font-weight: bold;
  letter-spacing: .5px;
  color: white;
}

.container-1 {
  padding-top: 30px;
}

.main-input {
  font-size: 16px;
  padding: 10px 10px 10px 5px;
  display: block;
  width: 185px;
  border: none;
  border-bottom: 1px solid #6c6c6c;
  background: transparent;
  color: #ffffff;
}

.main-input:focus {
  outline: none;
  border-bottom-color: #42ff1c;
}

.lebal-email {
  color: #999999;
  font-size: 18px;
  font-weight: normal;
  position: absolute;
  pointer-events: none;
  left: 5px;
  top: 10px;
  transition: 0.2s ease all;
  -moz-transition: 0.2s ease all;
  -webkit-transition: 0.2s ease all;
}

.main-input:focus ~ .lebal-email,
.main-input:valid ~ .lebal-email {
  top: -20px;
  font-size: 14px;
  color: #42ff1c;
}

.highlight-span {
  position: absolute;
  height: 60%;
  width: 0px;
  top: 25%;
  left: 0;
  pointer-events: none;
  opacity: 0.5;
}

.main-input:focus ~ .highlight-span {
  -webkit-animation: input-focus 0.3s ease;
  animation: input-focus 0.3s ease;
}

@keyframes input-focus {
  from {
    background: #42ff1c;
  }

  to {
    width: 185px;
  }
}

.submit {
  margin-top: 1.2rem;
  padding: 10px 20px;
  border-radius: 10px;
}