html, body {
    height: 100%;
}

body {
    font-family: Arial, sans-serif;
    background: #f9f9f9;
    color: #222;
    margin: 0;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1 0 auto;
}

footer {
    flex-shrink: 0;
}

h1 {
    color: #007acc;
}

.main-background {
  background-image:
    linear-gradient(rgba(255,255,255,0.5), rgba(255,255,255,0.5)),
    url('deidamia.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.main-highlight {
  font-size: 1.4rem;      /* increase size */
  font-weight: 600;       /* semi-bold */
  color: #1a1a1a;         /* slightly darker for contrast */
  text-shadow: 0 1px 2px rgba(0,0,0,0.15); /* subtle emphasis */
}

.nav-link.active {
    text-decoration: underline;
}