body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #eceffc;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
  margin: 0;
  padding: 0;
  flex-direction: column;
}

.btn {
  padding: 8px 20px;
  border-radius: 0;
  overflow: hidden;
  margin-bottom: 15px;
}
.btn::before {
  position: absolute;
  content: "";
  top: 0; 
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(120deg, transparent, #4ec0e9, transparent);
  transform: translateX(-100%);
  transition: 0.6s;
}
.btn:hover {
  background: transparent;
  box-shadow: 0 0 20px 10px rgba(51, 152, 219, 0.5);
}
.btn:hover::before {
  transform: translateX(100%);
}

.form-input-material {
  --input-default-border-color: white;
  --input-border-bottom-color: white;
}
.form-input-material input {
  color: white;
  width: 100%;
}

.login-form {
  margin: 40px 0;
  width: 250px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 50px 40px;
  color: white;
  background: rgba(0, 0, 0, 0.8);
  border-radius: 10px;
  box-shadow: 0 0.4px 0.4px rgba(128, 128, 128, 0.109), 0 1px 1px rgba(128, 128, 128, 0.155), 0 2.1px 2.1px rgba(128, 128, 128, 0.195), 0 4.4px 4.4px rgba(128, 128, 128, 0.241), 0 12px 12px rgba(128, 128, 128, 0.35);
}
.login-form h1 {
  margin: 0 0 24px 0;
}
.login-form .form-input-material {
  margin: 12px 0;
  width: 100%;
}
.login-form .btn {
  width: 100%;
  margin: 18px 0 9px 0;
}

a {
  color: white;
  text-decoration: none;
  display: inline-block;
  /* width: 100%; */
  padding: 15px 0 5px 0;
  text-align: center;
  transition: border-bottom 0.1s;
  margin-bottom: 1px;
}

a:hover {
  padding: 15px 0 4px 0;
  border-bottom: 1px solid #4ec0e9;
}