/* ✅ Reset + Font */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.7;
  background-color: #121212;
  color: #f1f1f1;
  transition: background-color 0.4s, color 0.4s;
  padding-bottom: 3rem;
}

.light-mode {
  background-color: #ffffff;
  color: #1a1a1a;
}

/* ✅ Header */
header {
  text-align: center;
  padding: 2rem 1rem;
  background-color: #003366;
  color: white;
}

header h1 {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
}

/* ✅ Navigation */
nav {
  margin-top: 1rem;
}

nav a {
  color: white;
  margin: 0 1rem;
  text-decoration: none;
  font-weight: bold;
  font-size: 1rem;
  transition: color 0.3s;
}

nav a:hover {
  color: #ffcc00;
}

.light-mode nav a {
  color: #ff6600; /* Bright orange - super visible on light blue */
}

/* ✅ Section Layout */
section {
  padding: 2rem;
  max-width: 960px;
  margin: auto;
}

/* ✅ Universal Card Style */
.book, .library, .lesson, .game {
  background-color: #ffffff;
  color: #111;
  border: 1px solid #ccc;
  border-radius: 14px;
  padding: 1.5rem;
  margin-bottom: 2rem;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.light-mode .book,
.light-mode .library,
.light-mode .lesson,
.light-mode .game {
  background-color: #f9f9f9;
  color: #111;
}

/* ✅ Headings */
.book h3,
.library h3,
.lesson h3,
.game h3 {
  font-size: 1.6rem;
  margin-bottom: 0.5rem;
  color: #003366;
}

.light-mode .book h3,
.light-mode .library h3,
.light-mode .lesson h3,
.light-mode .game h3 {
  color: #003366;
}

/* ✅ Paragraph Text */
.book p,
.library p,
.lesson p,
.game p {
  font-size: 1.1rem;
  line-height: 1.6;
  color: #111;
  margin-top: 0.5rem;
}

.light-mode .book p,
.light-mode .library p,
.light-mode .lesson p,
.light-mode .game p {
  color: #111;
}

/* ✅ Links */
.book a,
.library a,
.lesson a,
.game a {
  color: #0077cc;
  font-weight: bold;
  text-decoration: underline;
}

.light-mode .book a,
.light-mode .library a,
.light-mode .lesson a,
.light-mode .game a {
  color: #0044aa;
}

/* ✅ Hover Effect */
.book:hover,
.library:hover,
.lesson:hover,
.game:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

/* ✅ Quote Style */
.quote {
  font-style: italic;
  text-align: center;
  margin: 2rem auto;
  max-width: 800px;
  opacity: 0.9;
  color: #aaa;
}

.light-mode .quote {
  color: #555;
}

/* ✅ Toggle Button */
#toggleMode {
  margin-top: 1rem;
  padding: 0.5rem 1.2rem;
  font-size: 1rem;
  border-radius: 8px;
  border: none;
  background-color: #ffcc00;
  color: #003366;
  cursor: pointer;
  transition: all 0.3s ease;
}

.light-mode #toggleMode {
  background-color: #003366;
  color: #ffffff;
}

#toggleMode:hover {
  opacity: 0.9;
}

/* ✅ Footer */
footer {
  text-align: center;
  padding: 2rem 1rem;
  font-size: 0.9rem;
  background-color: #202020;
  color: #aaa;
}

.light-mode footer {
  background-color: #e0e0e0;
  color: #333;
}

/* ✅ Responsive Design */
@media (max-width: 768px) {
  nav a {
    display: block;
    margin: 0.5rem 0;
  }

  header h1 {
    font-size: 1.5rem;
  }

  section {
    padding: 1rem;
  }

  .book, .library, .lesson, .game {
    padding: 1rem;
  }
}
footer img {
  transition: transform 0.3s ease;
}

footer img:hover {
  transform: scale(1.2);
}