@font-face {
  font-family: Vazir;
  src: url('Prereq/fonts/vazir/Vazir.woff2') format('woff2'),
       url('Prereq/fonts/vazir/Vazir.woff') format('woff');
  font-weight: normal;
  font-style: normal;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Vazir', sans-serif;
  background-image: url('header-bg.jpg');
  background-size: cover;
  background-position: center;
  transition: background-image 0.5s ease;
  direction: rtl;
}

.overlay {
  backdrop-filter: blur(16px) saturate(150%);
  -webkit-backdrop-filter: blur(16px) saturate(150%);
  background-color: rgba(255, 255, 255, 0.15);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: center;
  text-align: center;
  color: #fff;
  padding: 40px 20px;
}

.glass-card {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 1rem;
  padding: 2rem;
  max-width: 600px;
  margin-top: 60px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  color: #fff;
  font-size: 1.1rem;
}

#datetime {
  margin-top: 1rem;
  font-size: 1rem;
}

footer {
  margin-bottom: 1rem;
  text-align: center;
}

.social-icons a {
  font-size: 1.8rem;
  margin: 0 10px;
  text-decoration: none;
}

footer .copyright {
  margin-top: 10px;
  font-size: 0.9rem;
  color: #eee;
}