body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f4f7fa;
  color: #1e293b;
  padding-top: 80px;
  scroll-behavior: smooth;
}

.header {
  background: linear-gradient(to right, #0f172a88, #1e293bcb), url('../images/banner.jpg') center/cover no-repeat;
  min-height: 88vh;
  color: white;
  padding: 6rem 1rem 3rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.header h1 {
  font-size: 3rem;
  font-weight: 800;
  margin-bottom: 1rem;
  text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.4);
}

.header p {
  font-size: 1.2rem;
  line-height: 1.7;
  max-width: 700px;
}

section {
  padding: 4rem 0;
}

section h3 {
  font-weight: 700;
  font-size: 1.75rem;
  margin-bottom: 0.5rem;
  color: #0f172a;
}

section p {
  color: #334155;
  font-size: 1rem;
  margin-bottom: 2rem;
}

.course .row {
  display: flex;
  flex-wrap: wrap;
}

.course .card {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  background-color: #ffffff;
  border-radius: 12px;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.05);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.course .card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.08);
}

.course .card-title {
  font-weight: 700;
  font-size: 1.1rem;
  color: #0f172a;
}

.course .card-text {
  color: #475569;
  font-size: 0.95rem;
  margin-top: 0.5rem;
}

.carousel-inner img {
  height: 60vh;
  object-fit: cover;
  border-radius: 10px;
}

.carousel-caption h5 {
  background-color: rgba(0, 0, 0, 0.6);
  display: inline-block;
  padding: 0.5rem 1.2rem;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
}

.testimonial-card {
  text-align: center;
  background-color: #fff;
  border-radius: 1rem;
  padding: 1rem;
}

.testimonial-card img {
  border: 4px solid #e2e8f0;
}

.ctu {
  background: linear-gradient(to right, rgba(0, 0, 0, 0.628), rgba(134, 159, 217, 0.75)), url('../images/banner2.jpg') center/cover no-repeat;
  color: white;
  padding: 4rem 2rem;
  max-width: 1200px;
  margin: 2rem auto;
  border-radius: 16px;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.ctu h3 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 2rem;
  line-height: 1.5;
  text-shadow: 1px 1px 3px rgba(185, 185, 185, 0.5);
}

.ctu a {
  text-decoration: none;
  color: white;
  background-color: transparent;
  padding: 0.8rem 2rem;
  border: 2px solid white;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 30px;
  transition: all 0.3s ease;
}

.ctu a:hover {
  background-color: #f43f5e;
  border: none;
}

footer.about {
  background-color: #f8fafc;
  padding: 2rem 0;
  color: #334155;
}

footer a {
  font-weight: 500;
  color: #1e293b;
  transition: color 0.3s ease;
}

footer a:hover {
  color: #f43f5e;
}