* {
  font-family: "Poppins", sans-serif;
}

:root {
  --primary-color: #0d47a1;
  --light-blue: #e3f2fd;
  --white: #ffffff;
  --dark-text: #333333;
  --muted-text: #666666;
  --card-radius: 12px;
  --card-padding: 1.5rem;
  --card-shadow: 0 12px 24px rgba(13, 71, 161, 0.08);
  --card-shadow-hover: 0 18px 32px rgba(13, 71, 161, 0.14);
  --section-spacing: clamp(60px, 10vw, 100px);
}

body {
  color: var(--dark-text);
  background-color: var(--white);
}

.navbar {
  border-bottom: 1px solid #f0f0f0;
}

.auto-hide-navbar {
  transition: transform 0.3s ease-in-out;
  will-change: transform;
}

.auto-hide-navbar.is-hidden {
  transform: translateY(-100%);
}

.navbar-brand {
  color: var(--primary-color) !important;
  font-size: 1.5rem;
}

.nav-link {
  color: var(--dark-text) !important;
  font-weight: 500;
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: var(--primary-color) !important;
}

.hero-section {
  background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
  padding: var(--section-spacing) 0;
}

.hero-section h1 {
  color: var(--primary-color);
  line-height: 1.2;
}

.hero-section .lead {
  color: var(--muted-text);
  font-size: 1.1rem;
}

.hero-image {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
}

.hero-illustration {
  max-width: 80%;
  height: auto;
  object-fit: contain;
}

.statistics-section {
  background-color: var(--light-blue);
  padding: var(--section-spacing) 0;
}

.stat-card {
  background: var(--white);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
}

.stat-card h3 {
  font-size: 2.5rem;
  margin-bottom: 10px;
}

.featured-books {
  padding: var(--section-spacing) 0;
}

.book-card {
  background: var(--white);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.book-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--card-shadow-hover);
}

.book-image {
  width: 100%;
  aspect-ratio: 3 / 4;
  background: linear-gradient(135deg, var(--primary-color), #1565c0);
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--card-radius);
  overflow: hidden;
}

.bg-gradient-1 {
  background: linear-gradient(135deg, #0d47a1, #1565c0) !important;
}

.bg-gradient-2 {
  background: linear-gradient(135deg, #1565c0, #1976d2) !important;
}

.bg-gradient-3 {
  background: linear-gradient(135deg, #1976d2, #1e88e5) !important;
}

.book-card h5 {
  color: var(--dark-text);
  margin-bottom: 5px;
}

.book-card .btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
  font-weight: 600;
}

.book-card .btn-primary:hover {
  background-color: #0d3a7a;
  border-color: #0d3a7a;
}

.book-thumbnail {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: calc(var(--card-radius) - 4px);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.18);
}

.services-section {
  padding: var(--section-spacing) 0;
}

.service-card {
  background: var(--white);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--card-shadow-hover);
}

.service-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  background: var(--light-blue);
  color: var(--primary-color);
  font-size: 1.8rem;
}

.events-section {
  padding: var(--section-spacing) 0;
}

.event-card {
  background: var(--white);
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
}

.event-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--card-shadow-hover);
}

.event-card .event-date {
  background: var(--primary-color);
  color: var(--white);
  padding: 1rem;
  display: inline-block;
  text-align: center;
  border-radius: 8px;
}

.event-card .event-date span {
  display: block;
  font-weight: 600;
}

.event-card .btn-outline-primary {
  border-color: var(--primary-color);
  color: var(--primary-color);
}

.event-card .btn-outline-primary:hover {
  background-color: var(--primary-color);
  color: var(--white);
}

.services-section .section-subtitle,
.events-section .section-subtitle,
.contact-section .section-subtitle {
  color: var(--muted-text);
  max-width: 600px;
  margin: 0 auto 1rem;
}

.testimonials-section {
  background: linear-gradient(135deg, var(--light-blue) 0%, var(--white) 100%);
  padding: var(--section-spacing) 0;
}

.testimonial-card {
  background: var(--white);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: 2rem;
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  height: 100%;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.testimonial-card .quote-icon {
  position: absolute;
  top: -20px;
  right: 20px;
  font-size: 3rem;
  color: rgba(13, 71, 161, 0.1);
}

.testimonial-card .author {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: 1.5rem;
}

.testimonial-card .avatar {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: var(--light-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary-color);
  font-weight: 600;
}

.newsletter-section {
  padding: var(--section-spacing) 0;
  background: var(--white);
}

.newsletter-card {
  background: linear-gradient(135deg, var(--primary-color), #1565c0);
  border-radius: calc(var(--card-radius) + 4px);
  padding: 3rem;
  color: var(--white);
  box-shadow: var(--card-shadow-hover);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.newsletter-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 22px 38px rgba(13, 71, 161, 0.2);
}

.newsletter-card .form-control {
  border-radius: 30px;
  padding: 0.75rem 1.5rem;
  border: none;
}

.newsletter-card .btn {
  border-radius: 30px;
  padding: 0.75rem 2rem;
  font-weight: 600;
  box-shadow: none;
}

.contact-section {
  padding: var(--section-spacing) 0;
}

.info-card {
  background: var(--white);
  border-radius: var(--card-radius);
  box-shadow: var(--card-shadow);
  padding: var(--card-padding);
  height: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.contact-card {
  background: var(--white);
  border-radius: calc(var(--card-radius) + 4px);
  box-shadow: var(--card-shadow);
  padding: 2.5rem;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow-hover);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.contact-info .info-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  background: var(--light-blue);
  border-radius: var(--card-radius);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-info .info-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--card-shadow);
}

.contact-info .info-icon {
  width: 45px;
  height: 45px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  color: var(--primary-color);
  font-size: 1.2rem;
  box-shadow: 0 6px 14px rgba(13, 71, 161, 0.15);
}

.contact-form .form-control {
  border-radius: var(--card-radius);
  padding: 0.75rem 1rem;
  border: 1px solid #e0e0e0;
  background: var(--white);
  box-shadow: none;
}

.contact-form .form-control:focus {
  border-color: rgba(13, 71, 161, 0.4);
  box-shadow: 0 0 0 0.2rem rgba(13, 71, 161, 0.15);
}

.contact-form textarea {
  min-height: 150px;
}

.btn-primary {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: #0d3a7a;
  border-color: #0d3a7a;
}

.announcements-section {
  padding: 80px 0;
}

.announcement-card {
  background: var(--white);
  border-radius: 12px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background-color 0.3s ease, color 0.3s ease;
  border-top: 4px solid var(--primary-color);
}

.announcement-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
  background: var(--primary-color);
  color: var(--white);
}

.announcement-card .badge {
  font-weight: 600;
  padding: 6px 12px;
}

.announcement-card:hover h5,
.announcement-card:hover p,
.announcement-card:hover .text-muted,
.announcement-card:hover .text-muted small {
  color: var(--white) !important;
}

.announcement-card:hover .badge {
  background: rgba(255, 255, 255, 0.2) !important;
  color: var(--white) !important;
}

.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 60px 0 30px;
}

.footer a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer a:hover {
  color: var(--white);
}

.footer .text-muted {
  color: rgba(255, 255, 255, 0.75) !important;
}

.footer .social-links a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  margin-right: 0.5rem;
}

.footer .divider {
  height: 1px;
  background: rgba(255, 255, 255, 0.2);
  margin: 2rem 0;
}