/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: sans-serif;
    line-height: 1.6;
    color: #333;
}

/* Header and Navigation */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0; left: 0;
    z-index: 1000;
}

nav {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #2c3e50;
}

nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

nav a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover {
    color: #3498db;
}

/* Main content */
main {
    margin-top: 80px;
}

section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

section > h2 {
    background-color: #f8f9fa;
    margin: 0px -5rem;
    padding: 0 4rem;
}

#hero {
    text-align: center;
    background-color: #f8f9fa;
    padding: 6rem 2rem;
}

#hero h1 {
    font-size: 2.5rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

/* Books section */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.book-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;

    max-width: 25em;
    min-height: 12em;

    display: flex;
    flex-direction: column;
}

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

.book-card img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

.book-card h3 {
    padding: 1rem;
    color: #2c3e50;
}

.book-card p {
    padding: 0 1rem 1rem;
    color: #666;
}

/* Videos section */
.videos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.video-card {
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.video-thumbnail {
    position: relative;
    cursor: pointer;
}

.video-thumbnail img {
    width: 100%;
    height: auto;
}

.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(0,0,0,0.7);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

.play-button i {
    color: #fff;
    font-size: 1.5rem;
}

.video-thumbnail:hover .play-button {
    background: rgba(0,0,0,0.9);
}

.video-card h3 {
    padding: 1rem;
    color: #2c3e50;
}

.video-card p {
    padding: 0 1rem 1rem;
    color: #666;
}


.spacer {
    flex: 1;
}
.download-links {
    padding: 1em;
}
/* About section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: center;
}

.author-photo {
    width: 100%;
    max-width: 300px;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.author-bio {
    color: #666;
}

.social-links {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
}

.social-link {
    color: #2c3e50;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.social-link:hover {
    color: #3498db;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background-color: #3498db;
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    transition: background-color 0.3s ease;
    margin: 1rem;
}

.btn:hover {
    background-color: #2980b9;
}

.book-card a {
    margin: 1rem;
}
/* Footer */
footer {
    background-color: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

/* Responsive design */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 1rem;
    }

    nav ul {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .author-photo {
        margin: 0 auto;
    }

    .social-links {
        justify-content: center;
    }
}