/* Base styles */

body {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #e0e0e0;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  transition: background-color 0.5s ease, color 0.5s ease;
  margin: 0;
  padding: 0;
}

body.dark {
  background: linear-gradient(135deg, #121212 0%, #1c1c1c 100%);
  color: #ddd;
}

.navbar {
  background: #0f1626cc; /* slightly transparent dark */
  box-shadow: 0 2px 6px rgba(0,0,0,0.7);
  padding: 15px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
}

.navbar .logo {
  font-size: 1.7rem;
  font-weight: 700;
  color: #ffd369;
  user-select: none;
}

.nav-links {
  display: flex;
  gap: 18px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li a {
  color: #e0e0e0;
  text-decoration: none;
  font-weight: 600;
  padding: 6px 10px;
  border-radius: 6px;
  transition: background-color 0.3s ease;
}

.nav-links li a:hover,
.nav-links li a.active {
  background: #ffd369;
  color: #121212;
  box-shadow: 0 0 6px #ffd369aa;
}

#themeToggle {
  font-size: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  color: #ffd369;
  transition: transform 0.3s ease;
}

#themeToggle:hover {
  transform: rotate(20deg);
}

header.hero {
  padding: 100px 20px 60px;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
  user-select: none;
}

header.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: #ffd369;
  margin-bottom: 15px;
  animation: fadeInDown 1.2s ease forwards;
}

header.hero p {
  font-size: 1.2rem;
  margin-bottom: 35px;
  color: #ccc;
  animation: fadeInUp 1.2s ease forwards;
}

@keyframes fadeInDown {
  from {opacity: 0; transform: translateY(-30px);}
  to {opacity: 1; transform: translateY(0);}
}
@keyframes fadeInUp {
  from {opacity: 0; transform: translateY(30px);}
  to {opacity: 1; transform: translateY(0);}
}

.btn {
  background: #ffd369;
  color: #121212;
  font-weight: 700;
  text-decoration: none;
  padding: 15px 35px;
  margin: 0 12px;
  border-radius: 40px;
  box-shadow: 0 4px 8px #ffd369aa;
  transition: all 0.3s ease;
  display: inline-block;
  user-select: none;
}

.btn:hover {
  background: #ffc107cc;
  box-shadow: 0 6px 12px #ffc107dd;
  transform: scale(1.05);
}

/* Quote of the Day Section */

.quote-section {
  margin: 40px auto;
  max-width: 600px;
  font-style: italic;
  font-size: 1.3rem;
  color: #ffd369cc;
  padding: 20px 30px;
  border-left: 6px solid #ffd369;
  background: #2c2f4a;
  border-radius: 12px;
  box-shadow: 0 2px 6px #0008 inset;
  user-select: text;
}

footer {
  margin-top: 60px;
  padding: 25px 15px;
  background: #0f1626cc;
  color: #aaa;
  text-align: center;
  font-size: 0.9rem;
  user-select: none;
}

footer p:last-child {
  margin-top: 8px;
  font-style: italic;
  color: #ffd369aa;
}

/* Responsive tweaks */

@media (max-width: 600px) {
  header.hero h1 {
    font-size: 2.2rem;
  }
  .btn {
    margin: 12px 8px;
    padding: 12px 25px;
    font-size: 0.9rem;
  }
  .quote-section {
    font-size: 1.1rem;
    padding: 15px 20px;
  }
}
.books-section {
  display: flex;
  justify-content: center;
  gap: 50px;
  margin: 50px auto 30px;
  max-width: 900px;
  user-select: none;
  flex-wrap: wrap;
  padding: 0 15px;
}

.book-card {
  background: #22253a;
  border-radius: 14px;
  box-shadow: 0 6px 15px #0008;
  text-align: center;
  width: 280px;
  padding: 20px;
  transition: transform 0.3s ease;
}

.book-card:hover {
  transform: scale(1.05);
  box-shadow: 0 12px 30px #ffd369aa;
}

.book-card img {
  width: 100%;
  height: auto;
  border-radius: 10px;
  margin-bottom: 15px;
  box-shadow: 0 4px 10px #000a inset;
}

.book-card h3 {
  color: #ffd369;
  font-weight: 700;
  margin-bottom: 15px;
}

.book-card .btn {
  padding: 12px 30px;
  font-size: 1rem;
}

/* Responsive for small screens */

@media (max-width: 650px) {
  .books-section {
    flex-direction: column;
    align-items: center;
    gap: 35px;
  }
  .book-card {
    width: 90%;
  }
}
.lessons {
  margin: 40px 0;
}
.lessons h2 {
  font-size: 2rem;
  color: #ffcc00;
  margin-bottom: 15px;
  text-shadow: 0 0 6px #b8860b;
}
.lessons ul {
  list-style: inside disc;
  font-size: 1.15rem;
  color: #ddd;
  line-height: 1.6;
}
.lessons li {
  margin-bottom: 12px;
}
.lessons li strong {
  color: #ffd369;
}