body {
  margin: 0;
  position: relative;
}

body::before {
  content: "";
  position: fixed;              /* stays put on scroll */
  inset: 0;
  background-image: url("images/wallpaper3.jpeg");
  background-size: cover;
  background-position: center;
  opacity: 0.85;                  /* ← controls paleness */
  z-index: -1;                   /* behind content */
}


#intro {
  text-align: center;
  margin-top: 4vh;
}

#header {
  width: 30vw;    
  height: auto;	
}

#main {
  margin-left: 20vw;
  margin-right: 20vw;
}

p {
  font-size: clamp(1rem, 1.5vw, 1.15rem);
}

#footnote1 {
  position: fixed;
  bottom: 0;
  font-style: italic;
  font-size: 1vw;
}

@media (max-width: 768px) {

  /* ---------- TYPOGRAPHY ---------- */
  p {
    font-size: 1rem;
    line-height: 1.25;
  }

  h1 {
    font-size: 1.8rem;
    line-height: 1.25;
    margin: 1rem 0;
  }

  h3 {
    font-size: 1.2rem;
    line-height: 1.25;
  }

  sup {
    font-size: 0.75rem;
  }

  /* ---------- LAYOUT ---------- */
  #main {
    margin-left: 1rem;
    margin-right: 1rem;
  }

  #intro {
    margin-top: 1.5rem;
    padding: 0 1rem;
  }

  /* ---------- HEADER IMAGE ---------- */
  #header {
    width: 80%;
    max-width: 320px;
    height: auto;
  }

  /* ---------- FOOTNOTE ---------- */
  #footnote1 {
    position: static;
    margin: 2rem 1rem 1rem;
    font-size: 0.85rem;
    text-align: center;
  }
}