/* General Styling */
body {
    font-family: 'Raleway', sans-serif;
    margin: 0;
    padding: 0;
    background: linear-gradient(to bottom, #000, #1a1a1a);
    color: #ffd700;
}

/* Navbar Styling */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background-color: #000;
    border-bottom: 1px solid #555;
}

.navbar-logo {
    display: flex;
    align-items: center;
}

.navbar-logo img {
    height: 50px;
    margin-right: 1rem;
}

.navbar-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.navbar-links a {
    text-decoration: none;
    color: #ffd700;
    font-weight: bold;
    transition: color 0.3s;
}

.navbar-links a:hover {
    color: #ff4500;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 5rem 2rem;
    background: linear-gradient(to right, #ffd700, #ff4500);
    color: black;
}

.hero h2 {
    font-size: 3rem;
    font-weight: bold;
}

.hero p {
    font-size: 1.5rem;
    margin-top: 1rem;
}

/* Chapters Section */
.chapters {
    padding: 2rem;
    background: #111;
}

.chapters h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.chapters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.chapter-card {
    background: #222;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #555;
    transition: transform 0.3s;
}

.chapter-card:hover {
    transform: translateY(-10px);
}

.hidden {
    display: none;
}

/* Interactive Section */
.interactives {
    padding: 2rem;
    background: #111;
}

.interactives h3 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
}

.interactives-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.interactive-card {
    background: #222;
    padding: 1.5rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid #555;
    transition: transform 0.3s;
}

.interactive-card:hover {
    transform: translateY(-10px);
}

/* Footer */
.footer {
    text-align: center;
    padding: 1rem 0;
    background: #000;
    color: #ffd700;
}