html, body {
  height: 100%;
  margin: 0;
  padding: 0;
  overflow-y: auto; /* instead of hidden */
  overflow: hidden;
}

.background {
    box-sizing: border-box;
    background-image: url(background.jpg);
    background-size: cover;
    background-position: center;
    background-repet: no-repeat;
    height: 100vh;
    margin: 0;
    padding: 0;
}

.main {
    display: flex;
    flex-direction: column;
    justify-content: center;     /* this centers content vertically */
    align-items: center;         /* this centers content horizontally */
    height: 100vh;             /* full screen height */
    text-align: center;
    padding-top: 40px;
}

h1 {
    margin-bottom: 0.5rem;
    margin-top: 0;
    font-size: clamp(10px, 2vw, 30px) !important;
}

h2 {
    margin-bottom: 0.5rem;
    margin-top: 0px;
    font-size: clamp(10px, 2vw, 20px) !important;
}

.text {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-item: center;
}

.text a {
    color: black;
    text-decoration: none;
}

.responsive-img {
    max-width: 100%;
    height: auto;
}