@import url('https://fonts.googleapis.com/css2?family=Muli&display=swap');

* {
  box-sizing: border-box;
}

body {
  font-family: 'Muli', sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #fff;
  background-color: steelblue;
  justify-content: center;
  height: 100vh;
  overflow: hidden;
  margin: 0;
}

.container {
  background-color: rgba(0, 0, 0, 0.4);
  border-radius: 5px;
  padding: 20px;
}

.form-header {
  text-align: center;
  margin-bottom: 30px;
}

.form-register-link {
  color: lightblue;
  text-decoration: none;
}

.form-control {
  width: 300px;
  margin: 20px 0 40px;
  position: relative;
}

.form-control-input {
  display: block;
  width: 100%;
  font-size: 18px;
  color: #fff;
  background-color: transparent;
  border: none;
  border-bottom: 1px solid #fff;
  padding: 15px 0;
}

.form-control-input:focus,
.form-control-input:valid {
  border-bottom-color: lightblue;
  outline: none;
}

.form-control-label {
  top: 15px;
  left: 0;
  position: absolute;
}

span {
  display: inline-block;
  font-size: 18px;
  min-width: 5px;
  transition: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

.form-control-input:focus + .form-control-label span,
.form-control-input:valid + .form-control-label span {
  color: lightblue;
  transform: translateY(-30px);
}

.btn {
  width: 100%;
  font-family: inherit;
  font-size: 16px;
  background-color: lightblue;
  border: 1px solid lightblue;
  border-radius: 5px;
  padding: 15px;
}

.btn:hover {
  color: #fff;
  border: 1px solid #fff;
}

.btn:active {
  transform: scale(0.98);
}

.form-control-input,
.btn {
  cursor: pointer;
}

.text {
  margin-top: 30px;
}