/* Global Reset and Base Theme */
* {
  box-sizing: border-box;
}

body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: 'Segoe UI', sans-serif;
  overflow-x: hidden;
}

/* 🔁 Fullscreen Video Background */
.video-bg-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: -2;
  overflow: hidden;
}

.video-bg-container video {
  width: 100vw;
  height: 100vh;
  object-fit: cover;
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: rgba(0, 0, 0, 0.65);
  z-index: -1;
}

/* 🌐 Navigation */
nav {
  background-color: rgba(0,0,0,0.7);
  padding: 10px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

nav .logo {
  color: #fff;
  font-weight: bold;
}

nav img {
  height: 40px;
  vertical-align: middle;
}

nav a {
  color: white;
  margin-left: 15px;
  text-decoration: none;
}

/* Main Content */
.main-content {
  position: relative;
  z-index: 2;
  color: white;
  padding: 20px;
}

/* 🔥 Hero */
.hero {
  text-align: center;
  padding: 100px 20px 60px;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
}

.btn {
  background-color: #00d0ff;
  padding: 10px 20px;
  border: none;
  color: black;
  font-weight: bold;
  cursor: pointer;
  border-radius: 5px;
}

/* ✅ Sections */
section {
  margin: 40px 0;
}

h2, h3 {
  color: #00d0ff;
}

/* List with Tick */
ul {
  list-style: none;
  padding-left: 0;
}

ul li::before {
  content: "✔️ ";
  color: #00ff88;
}

/* 📚 Course Grid */
.course-gallery {
  text-align: center;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  padding: 20px 0;
}

.course-card {
  background-color: rgba(255, 255, 255, 0.08);
  border-radius: 10px;
  padding: 15px;
  text-align: center;
  color: white;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: transform 0.3s;
}

.course-card:hover {
  transform: translateY(-5px);
}

.course-card img {
  width: 100%;
  max-height: 150px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 10px;
}

.course-card h3 {
  margin: 10px 0 5px;
  font-size: 1.1rem;
}

.course-card p {
  font-size: 0.95rem;
  color: #ccc;
}

/* 📎 Footer */
footer {
  text-align: center;
  padding: 30px 10px;
  background-color: rgba(0, 0, 0, 0.7);
  margin-top: 50px;
  position: relative;
  z-index: 2;
  color: white;
}

footer a {
  color: #00d0ff;
}