body {
  background: linear-gradient(135deg, #6A0DAD 0%, #1E90FF 100%);
  font-family: 'Raleway', sans-serif;
  color: #333;
  min-height: 100vh;
}

/* Navbar */
.navbar {
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.navbar-brand {
  font-family: 'Poppins', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  background: linear-gradient(90deg, #6A0DAD, #1E90FF);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: 1px;
}

.nav-link {
  color: #333 !important;
  font-weight: 500;
}

.nav-link:hover {
  color: #6A0DAD !important;
}

/* Hero Section */
.hero {
  text-align: center;
  color: white;
  padding: 120px 20px 80px;
  background: linear-gradient(180deg, rgba(106,13,173,0.8) 0%, rgba(30,144,255,0.8) 100%), 
              url('https://images.unsplash.com/photo-1506744038136-46273834b3fb?auto=format&fit=crop&w=1350&q=80') 
              center/cover no-repeat;
  background-attachment: fixed;
}

.hero h1 {
  font-family: 'Poppins', sans-serif;
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.hero p {
  font-size: 1.2rem;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

/* Section Title */
.section-title {
  text-align: center;
  margin: 60px 0 30px;
  color: white;
  font-family: 'Poppins', sans-serif;
}

/* Article Cards */
.article-card {
  border: none;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  transition: all 0.3s ease;
}

.article-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 6px 25px rgba(0,0,0,0.15);
}

.article-card .card-body {
  background: white;
}

.article-card h5 {
  color: #6A0DAD;
  font-weight: 600;
}

/* Book Section */
.book-ad {
  background: rgba(255,255,255,0.95);
  border-radius: 20px;
  text-align: center;
  padding: 50px;
  margin-top: 60px;
  box-shadow: 0 5px 25px rgba(0,0,0,0.1);
}

.book-ad h3 {
  color: #6A0DAD;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  margin-bottom: 15px;
}

.book-ad p {
  color: #444;
  margin-bottom: 25px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.book-ad button {
  background: linear-gradient(90deg, #6A0DAD, #1E90FF);
  border: none;
  color: white;
  border-radius: 30px;
  padding: 12px 30px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
}

.book-ad button:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

/* Footer */
footer {
  background: rgba(255,255,255,0.9);
  text-align: center;
  padding: 20px;
  margin-top: 80px;
  font-size: 0.9rem;
  color: #333;
}

/* ==== Book Ad Section ==== */
.book-ad {
  background: rgba(255, 255, 255, 0.97);
  border-radius: 25px;
  text-align: center;
  padding: 60px 50px;
  margin-top: 80px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.book-ad:hover {
  transform: translateY(-5px);
}

.book-image img {
  max-width: 260px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-image img:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.book-text h3 {
  color: #6A0DAD;
  font-family: 'Poppins', sans-serif;
  font-weight: 600;
  margin-bottom: 20px;
}

.book-text p {
  color: #444;
  margin-bottom: 25px;
  max-width: 600px;
  font-size: 1rem;
  line-height: 1.8;
  text-align: justify;
}

.book-text em {
  color: #1d1f21;
  font-style: normal;
  font-weight: 600;
}

.book-text button {
  background: linear-gradient(90deg, #6A0DAD, #1E90FF);
  border: none;
  color: white;
  border-radius: 30px;
  padding: 12px 35px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
}

.book-text button:hover {
  opacity: 0.9;
  transform: scale(1.03);
}

/* Responsive Layout */
@media (max-width: 768px) {
  .book-ad {
    flex-direction: column;
    padding: 40px 25px;
  }

  .book-image img {
    max-width: 220px;
  }
}