:root {
    --primary: #1a237e;
    --accent: #ffd54f;
    --text: #333;
    --bg: #f4f7f6;
    --white: #ffffff;
    --gray: #e0e0e0;
}

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

body { 
    font-family: 'Inter', system-ui, -apple-system, sans-serif; 
    background-color: var(--bg); 
    color: var(--text); 
    line-height: 1.6; 
}

header { 
    background: var(--primary); 
    color: var(--white); 
    padding: 40px 20px; 
    text-align: center; 
    border-bottom: 5px solid var(--accent); 
}

.container { 
    max-width: 900px; 
    margin: 0 auto; 
    padding: 20px; 
}

.ad-space { 
    background: var(--white); 
    margin: 20px 0; 
    text-align: center; 
    padding: 15px; 
    border: 1px solid var(--gray); 
    border-radius: 8px; 
    min-height: 100px; 
}

.card { 
    background: var(--white); 
    padding: 30px; 
    border-radius: 12px; 
    box-shadow: 0 4px 15px rgba(0,0,0,0.05); 
    margin-bottom: 30px; 
}

.quote { 
    font-style: italic; 
    color: #555; 
    border-left: 4px solid var(--accent); 
    padding-left: 15px; 
    margin: 20px 0; 
}

.chapter-grid { 
    display: grid; 
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); 
    gap: 20px; 
}

.chapter-card { 
    background: var(--white); 
    border-radius: 8px; 
    padding: 20px; 
    border: 1px solid #ddd; 
    transition: 0.3s; 
    text-decoration: none; 
    color: inherit; 
    display: block;
}

.chapter-card:hover { 
    transform: translateY(-5px); 
    border-color: var(--primary); 
    box-shadow: 0 8px 20px rgba(0,0,0,0.1); 
}

.chapter-card h3 { color: var(--primary); margin-bottom: 10px; }

.read-btn { 
    display: inline-block; 
    margin-top: 15px; 
    font-weight: bold; 
    color: var(--primary); 
}

footer { 
    text-align: center; 
    padding: 40px; 
    font-size: 0.85rem; 
    color: #777; 
    border-top: 1px solid var(--gray); 
    margin-top: 40px; 
}

footer a { color: var(--primary); text-decoration: underline; margin: 0 10px; }

/* Typography for content */
.content h1 { font-size: 2rem; color: var(--primary); margin-bottom: 1rem; }
.content h2 { font-size: 1.5rem; color: var(--primary); margin-top: 2rem; margin-bottom: 1rem; }
.content p { margin-bottom: 1.2rem; }
.content ul { margin-bottom: 1.2rem; padding-left: 20px; }
.highlight-box { 
    background: #e3f2fd; 
    border-left: 5px solid #2196f3; 
    padding: 20px; 
    margin: 20px 0; 
    border-radius: 4px;
}