*{
    margin: 0;
    padding: 0;
}
@font-face {
    font-family: 'Gotham Screen Smart';
    src: local('Gotham Screen Smart Book'), local('Gotham-Screen-Smart-Book'),
    url('https://ValiantWind.github.io/QR-Code-Generator/fonts/GothamSSm-Book.woff2') format('woff2'),
    url('https://ValiantWind.github.io/QR-Code-Generator/fonts/GothamSSm-Book.woff') format('woff'),
  	url('https://ValiantWind.github.io/QR-Code-Generator/fonts/GothamSSm-Book.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
}

.main{
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    background: rgba(18, 18, 18, 1);
}

h1{
    color: white;
    margin: 15px;
    font-family: 'Gotham Screen Smart', sans-serif;
    font-size: 24px;
    font-style: normal;
    font-weight: 500;
    line-height: 140%;
}
h3{
    color: white;
    margin: 15px;
    font-family: 'Gotham Screen Smart', sans-serif;
    font-style: normal;
    font-weight: 500;
    line-height: 140%;
}


input{
    width: 300px;
    height: 40px;
    background: transparent;
    border: none;
    margin: 15px;
    outline: none;
    font-size: 1.2rem;
    color: white;
    padding: 0 10px;
    font-family: 'Gotham Screen Smart', sans-serif;
}


output{
    color: white;
    margin: 15px;
    font-family: 'Gotham Screen Smart', sans-serif;
    font-style: normal;
    font-weight: 500;
    line-height: 140%;
}

button {
  position: relative;
  overflow: hidden;
  transition: background 400ms;
  color: #171717;
  background-color: #2BB1FF;
  padding: 1rem 2rem;
  font-family: 'Gotham Screen Smart', Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;
  font-size: 1.5rem;
  outline: 0;
  border: 0;
  border-radius: 0.25rem;
  box-shadow: 0 0 0.5rem rgba(0, 0, 0, 0.3);
  cursor: pointer;
	margin: 10px;
}

span.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 600ms linear;
  background-color: rgba(255, 255, 255, 0.7);
}

@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

button:hover{
  text-decoration: none;
  background-color: rgba(43, 177, 255, 0.8);
}