* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
    padding: 20px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header {
    text-align: center;
    margin-bottom: 40px;
    padding-bottom: 30px;
    border-bottom: 2px solid #e0e0e0;
}

header h1 {
    font-size: 2.5em;
    margin-bottom: 10px;
    color: #2c3e50;
}

.subtitle {
    font-size: 1.1em;
    color: #666;
    margin-bottom: 10px;
    font-style: italic;
}

.author {
    font-size: 1em;
    color: #888;
}

#chapters-list {
    display: grid;
    gap: 15px;
}

.chapter-card {
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    display: block;
}

.chapter-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translateY(-2px);
    border-color: #3498db;
}

.chapter-card h2 {
    font-size: 1.3em;
    margin-bottom: 10px;
    color: #2c3e50;
}

.chapter-number {
    color: #3498db;
    font-weight: bold;
}

.chapter-summary {
    font-size: 0.95em;
    color: #666;
    line-height: 1.5;
    margin-top: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.chapter-meta {
    display: flex;
    gap: 15px;
    margin-top: 12px;
    font-size: 0.85em;
    color: #888;
}

.chapter-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.icon {
    width: 16px;
    height: 16px;
}

/* Chapter detail page styles */
.chapter-detail {
    max-width: 800px;
    margin: 0 auto;
}

.chapter-header {
    margin-bottom: 30px;
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: #3498db;
    text-decoration: none;
    font-size: 0.9em;
}

.back-link:hover {
    text-decoration: underline;
}

.audio-player {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 8px;
    margin: 20px 0;
}

.audio-player audio {
    width: 100%;
    margin-top: 10px;
}

.chapter-content {
    line-height: 1.8;
    font-size: 1.05em;
}

.chapter-content h1 {
    font-size: 2em;
    margin: 30px 0 20px;
    color: #2c3e50;
}

.chapter-content h2 {
    font-size: 1.5em;
    margin: 25px 0 15px;
    color: #34495e;
}

.chapter-content p {
    margin-bottom: 15px;
    text-align: justify;
}

.chapter-content em {
    font-style: italic;
    color: #555;
}

@media (max-width: 768px) {
    .container {
        padding: 20px;
    }

    header h1 {
        font-size: 2em;
    }

    .chapter-card h2 {
        font-size: 1.1em;
    }
}