html {
  font-size: calc(100% + 0.5vw);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition-duration: 0.001s !important;
  }
}
.container {
  padding: 2em;
  min-height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
}

.input-group {
  width: 100%;
  max-width: 20em;
  display: flex;
  flex-direction: column;
  z-index: 2;
}
@supports (mix-blend-mode: darken) {
  .input-group {
    position: relative;
    mix-blend-mode: lighten;
  }
  .input-group__label {
    position: absolute;
    font-family: OpenSans-Regular, sans-serif;
    left: 3em;
    top: -0.28em;
    background: #000;
  }
}
.input-group__label {
  font-family: OpenSans-Regular, sans-serif;
  padding: 0 0.5em;
  margin-bottom: 0.5em;
  text-transform: uppercase;
  font-size: 0.875em;
  letter-spacing: 0.1em;
  color: #ccd;
  color: rgba(255, 220, 255, 0.6);
  cursor: pointer;
}
.input-group__input {
  color: #fff;
  font-size: 1.25rem;
  line-height: 1;
  border-style: none;
  outline: none;
  height: 3.1em;
  width: 100%;
  padding: 0.8em 1em;
  border: 0.25em solid transparent;
  background-image: linear-gradient(#000, #000), linear-gradient(120deg, #f09 0%, #0ff 50%, #9f0 100%);
  background-origin: border-box;
  background-clip: padding-box, border-box;
  border-radius: 1.8em;
  background-size: 200% 100%;
  transition: background-position 0.8s ease-out;
}
.input-group__input:hover {
  background-position: 100% 0;
}
.input-group__input:focus {
  outline: 2px dashed #ad2b89;
  outline-offset: 0.5em;
}