/* Modern Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Roboto, sans-serif;
}

body {
  background: #f4f6fa;
  color: #222;
  line-height: 1.5;
}

/* Header */
.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  background: linear-gradient(135deg, #1e3a8a, #2563eb);
  color: #fff;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  letter-spacing: 1px;
}

.search-bar {
  padding: 0.5rem 1rem;
  border-radius: 25px;
  border: none;
  width: 300px;
  max-width: 50%;
  outline: none;
  font-size: 1rem;
}

.nav-links {
  display: flex;
  gap: 1.2rem;
  align-items: center;
}

.nav-links a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: #facc15;
}

.login-btn {
  background: #facc15;
  color: #1e3a8a;
  padding: 0.5rem 1rem;
  border-radius: 25px;
  font-weight: bold;
  transition: 0.3s;
}

.login-btn:hover {
  background: #fbbf24;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 4rem 1rem;
  background: url('https://png.pngtree.com/thumb_back/fh260/background/20230705/pngtree-online-education-3d-render-of-a-computer-on-a-wooden-table-image_3792188.jpg') center/cover no-repeat;
  color: white;
  position: relative;
  overflow: hidden;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
  animation: fadeInDown 1.2s ease-in-out;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 1.5rem;
  animation: fadeIn 1.5s ease-in-out;
}

.badges {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.badge {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: bold;
  backdrop-filter: blur(5px);
}

/* Buttons */
.btn {
  display: inline-block;
  background: #facc15;
  color: #1e3a8a;
  padding: 0.7rem 1.8rem;
  border-radius: 30px;
  text-decoration: none;
  font-size: 1rem;
  font-weight: bold;
  transition: all 0.3s ease;
}

.btn:hover {
  background: #fbbf24;
  transform: translateY(-3px);
}

/* Courses Section */
.featured {
  padding: 3rem 1.5rem;
  text-align: center;
}

.featured h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #1e3a8a;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.course-card {
  background: #fff;
  padding: 1rem;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.course-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.2);
}

.course-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 0.8rem;
}

.course-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.5rem;
  color: #2563eb;
}

.course-card p {
  font-size: 0.9rem;
  margin-bottom: 0.8rem;
  color: #555;
}

/* Footer */
footer {
  background: #1e3a8a;
  color: white;
  text-align: center;
  padding: 1rem;
  margin-top: 3rem;
  font-size: 0.9rem;
}

footer a {
  color: #facc15;
  text-decoration: none;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}