.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2); /* very light overlay to help contrast */
  z-index: 0;
}

.header h1, .header p {
  position: relative;
  z-index: 1; 
}



.header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4); /* semi-transparent black overlay */
  z-index: 0;
}

.header h1, .header p {
  position: relative;
  z-index: 1; /* puts text above the overlay */
}



.header {
  position: relative;
  width: 100%;
  height: 300px; /* adjust the height as needed */
  background-image: url('https://i.imgur.com/vVNDgZm.png'); /* replace with your direct Imgur link */
  background-size: cover;    /* makes image cover the entire div */
  background-position: center; /* centers the image */
  display: flex;
  align-items: center;       /* vertically centers the title */
  justify-content: center;   /* horizontally centers the title */
  color: white;              /* title text color */
  text-shadow: 2px 2px 4px rgba(0,0,0,0.7); /* makes text readable */
}


.top-image {
  max-width: 800px; /* image won’t be wider than this */
  width: 100%;
  height: auto;
  margin: 0 auto;   /* centers the image */
  display: block;
}


body {
  font-family: 'Open Sans', sans-serif;
  margin: 0;
  line-height: 1.6;
  color: #333;
}

.container {
  width: 90%;
  max-width: 1000px;
  margin: auto;
}

.site-header {
  background: linear-gradient(90deg, #0077b6, #00b4d8);
  color: white;
  text-align: center;
  padding: 60px 20px;
}

.tagline {
  font-size: 1.2em;
  margin-top: 10px;
}

.navbar {
  background: #023e8a;
}

.navbar ul {
  list-style: none;
  display: flex;
  justify-content: center;
  padding: 0;
}

.navbar li {
  margin: 0 15px;
}

.navbar a {
  color: white;
  text-decoration: none;
  font-weight: 600;
  padding: 15px;
  display: block;
}

.navbar a:hover {
  background: #00b4d8;
  border-radius: 5px;
}

.section {
  padding: 60px 0;
}

.bg-light {
  background: #f9f9f9;
}

h2 {
  color: #023e8a;
  border-bottom: 2px solid #00b4d8;
  display: inline-block;
  margin-bottom: 20px;
}

.pub-list li {
  margin-bottom: 10px;
}

.student-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}

.student-card {
  background: white;
  border-radius: 8px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
  padding: 20px;
  text-align: center;
}

.student-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 15px;
}

.footer {
  background: #023e8a;
  color: white;
  text-align: center;
  padding: 15px;
  margin-top: 40px;
}

.top-image {
  width: 100%;
  height: auto;
  display: block;
  margin-bottom: 20px;
}

.student-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
}

.student-card {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  padding: 20px;
  text-align: center;
  width: 250px;
}

.student-card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 10px;
}