/* Genel sayfa stili */
body {
  font-family: Arial, sans-serif;
  background-color: #f4f4f4;
  color: #333;
  margin: 0;
  padding: 20px;
}

/* Başlık stili */
h1 {
  text-align: center;
  color: #2c3e50;
}

/* Menü ve linkler */
nav ul {
  list-style-type: none;
  padding: 0;
  display: flex;
  justify-content: center;
  gap: 20px;
}

nav ul li {
  display: inline;
}

nav ul li a {
  text-decoration: none;
  color: #0077cc;
  font-weight: bold;
  padding: 5px 10px;
  border-radius: 5px;
  transition: background 0.3s;
}

nav ul li a:hover {
  background-color: #0077cc;
  color: white;
}

/* PDF ve video linkleri listesi */
ul li a {
  text-decoration: none;
  color: #0077cc;
}

ul li a:hover {
  text-decoration: underline;
}

/* Video iframe */
iframe {
  display: block;
  margin: 20px auto;
  max-width: 800px;
  width: 100%;
  height: 450px;
  border: none;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}