/* RESET & BASE */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  height: 100%;
  width: 100%;
  font-family: Arial, sans-serif;
  color: #fff;
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)),
    url('../images/course.jpg') center/cover no-repeat;
  background-attachment: fixed;
}

/*HEADER */
header {
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
}

/* NAVBAR */
.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 5%;
  background-color: #800000;
  color: #fff;
}

.navbar .logo {
  font-size: 1.5rem;
  font-weight: 600;
}

.navbar ul {
  display: flex;
  list-style: none;
  gap: 1.2rem;
}

.navbar ul li a {
  color: #fff;
  text-decoration: none;
  transition: 0.3s;
  font-weight: bold;
}

.navbar ul li a:hover,
.navbar ul li a.active {
  color: #ffc107;
}

/* MAIN CONTENT */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 120px; /* Avoid overlap with fixed header */
  padding-bottom: 50px;
  width: 100%;
}

/* PAGE TITLE */
h1 {
  text-align: center;
  color: white;
  background-color: #800000;
  padding: 1.5rem 0;
  font-size: 2rem;
  letter-spacing: 1px;
  width: 100%;
  position: sticky;
  top: 65px;
  z-index: 900;
}

/* SUB NAVIGATION */
nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2rem;
  background-color: #800000;
  padding: 1rem 0;
  list-style: none;
  width: 100%;
}

nav ul li a {
  color: #fff;
  text-decoration: none;
  font-weight: bold;
  transition: color 0.3s;
}

nav ul li a:hover {
  color: #ffc107;
}

/* COURSE BOXES */
.course {
  background-color: rgba(0, 0, 0, 0.3);
  border: 2px solid #ffc107;
  color: white;
  margin: 30px auto;
  width: 80%;
  padding: 20px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 0 15px rgba(0, 0, 0, 0.4);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.course:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 20px rgba(255, 193, 7, 0.6);
}

.course h2 {
  color: #ffc107;
}

.course p {
  line-height: 1.6;
  font-size: 1rem;
}

/* MAJOR SECTION */
.major {
  background-color: #fff;
  color: #333;
  margin-top: 15px;
  padding: 15px;
  border-radius: 8px;
  box-shadow: 0 0 8px rgba(0, 0, 0, 0.3);
}

.major h3 {
  color: #800000;
  margin-bottom: 8px;
}

/* FOOTER */
footer {
  background-color: #800000;
  color: white;
  text-align: center;
  padding: 15px 0;
  font-size: 0.9em;
  width: 100%;
  margin-top: auto;
}

/* RESPONSIVE DESIGN */
@media (max-width: 768px) {
  .navbar ul {
    flex-direction: column;
    align-items: center;
  }

  .course {
    width: 90%;
  }

  h1 {
    font-size: 1.5rem;
  }
}