:root {
            --primary-color: #1a2332;
            --secondary-color: #2d4057;
            --accent-color: #d4af37;
            --text-light: #6c757d;
            --text-dark: #212529;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
            --shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
            --border-radius: 0.75rem;
        }

        * {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', sans-serif;
            line-height: 1.6;
            color: var(--text-dark);
        }

        /* Navigation */
        .navbar {
            background: rgba(26, 35, 50, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding: 1rem 0;
            transition: all 0.3s ease;
        }

        .navbar.scrolled {
            background: rgba(26, 35, 50, 0.98);
            box-shadow: var(--shadow-lg);
        }

        .navbar-brand {
            font-family: 'Crimson Text', serif;
            font-size: 1.75rem;
            font-weight: 600;
            color: var(--bg-white) !important;
            letter-spacing: -0.02em;
        }

        .navbar-nav .nav-link {
            color: rgba(255, 255, 255, 0.9) !important;
            font-weight: 500;
            margin: 0 0.5rem;
            padding: 0.5rem 1rem !important;
            border-radius: var(--border-radius);
            transition: all 0.3s ease;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-color) !important;
            background: rgba(212, 175, 55, 0.1);
        }

        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
            color: var(--bg-white);
            padding: 150px 0 100px;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 100" fill="%23ffffff" opacity="0.03"><path d="M0,20 Q250,80 500,20 T1000,20 L1000,100 L0,100 Z"/></svg>') repeat-x;
            background-size: 1000px 100px;
            opacity: 0.1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero h1 {
            font-family: 'Crimson Text', serif;
            font-size: clamp(2.5rem, 5vw, 4rem);
            font-weight: 600;
            margin-bottom: 1.5rem;
            letter-spacing: -0.02em;
        }

        .hero .lead {
            font-size: 1.25rem;
            opacity: 0.9;
            margin-bottom: 2rem;
            max-width: 600px;
        }

        .btn-accent {
            background: var(--accent-color);
            border: none;
            color: var(--primary-color);
            padding: 0.75rem 2rem;
            font-weight: 600;
            border-radius: 50px;
            transition: all 0.3s ease;
            box-shadow: 0 4px 15px rgba(212, 175, 55, 0.3);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(212, 175, 55, 0.4);
            color: var(--primary-color);
            background: #e6c547;
        }

        /* Section Styles */
        .section-title {
            font-family: 'Crimson Text', serif;
            font-size: 2.5rem;
            font-weight: 600;
            text-align: center;
            margin-bottom: 3rem;
            color: var(--primary-color);
            position: relative;
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -0.5rem;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 3px;
            background: var(--accent-color);
            border-radius: 2px;
        }

        /* Series Overview */
        .series-overview {
            background: var(--bg-light);
            padding: 5rem 0;
        }

        .series-card {
            background: var(--bg-white);
            border-radius: var(--border-radius);
            padding: 2rem;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        .progress-ring {
            width: 120px;
            height: 120px;
            margin: 0 auto 2rem;
        }

        .progress-ring svg {
            transform: rotate(-90deg);
        }

        .progress-ring-bg {
            fill: transparent;
            stroke: #e9ecef;
            stroke-width: 8;
        }

        .progress-ring-fill {
            fill: transparent;
            stroke: var(--accent-color);
            stroke-width: 8;
            stroke-linecap: round;
            stroke-dasharray: 314;
            stroke-dashoffset: 125.6; /* 60% progress for 8/11 books */
            transition: stroke-dashoffset 1s ease;
        }

        .progress-text {
            text-align: center;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-top: -4rem;
            position: relative;
            z-index: 1;
        }

        /* Book Grid */
        .books-section {
            padding: 5rem 0;
        }

        .book-card {
            background: var(--bg-white);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
            position: relative;
        }

        .book-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .book-cover {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-white);
            font-weight: 600;
            text-align: center;
            padding: 0;
            position: relative;
            overflow: hidden;
        }

        .book-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.3s ease;
        }

        .book-card:hover .book-cover img {
            transform: scale(1.05);
        }

        .book-cover-placeholder {
            padding: 1rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
        }

        .book-cover-placeholder .fa-book {
            font-size: 3rem;
            margin-bottom: 1rem;
            opacity: 0.7;
        }

        .book-number {
            position: absolute;
            top: 1rem;
            right: 1rem;
            background: var(--accent-color);
            color: var(--primary-color);
            width: 36px;
            height: 36px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
        }

        .book-info {
            padding: 1.5rem;
        }

        .book-title {
            font-family: 'Crimson Text', serif;
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 0.5rem;
        }

        .book-status {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .status-published {
            background: #d1edff;
            color: #0066cc;
        }

        .status-coming-soon {
            background: #fff3cd;
            color: #856404;
        }

        .book-description {
            color: var(--text-light);
            line-height: 1.5;
            margin-bottom: 1.5rem;
            font-size: 0.95rem;
        }

        .book-link {
            color: var(--accent-color);
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
        }

        .book-link:hover {
            color: #b8941f;
        }

        .book-link.disabled {
            color: var(--text-light);
            cursor: not-allowed;
        }

        /* Coming Soon Books */
        .book-card.coming-soon {
            opacity: 0.7;
            border: 2px dashed #dee2e6;
        }

        .book-card.coming-soon .book-cover {
            background: linear-gradient(135deg, #6c757d, #495057);
        }

        /* About Section */
        .about-section {
            padding: 5rem 0;
            background: var(--bg-white);
        }

        .author-image {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--bg-white);
            font-size: 3rem;
            margin: 0 auto 2rem;
            box-shadow: var(--shadow-lg);
        }

        .about-text {
            font-size: 1.1rem;
            line-height: 1.7;
            color: var(--text-light);
        }

        .about-text p:first-child {
            font-size: 1.25rem;
            color: var(--text-dark);
            font-weight: 500;
        }

        /* Contact Section */
        .contact-section {
            padding: 5rem 0;
            background: var(--bg-light);
        }

        .contact-card {
            background: var(--bg-white);
            border-radius: var(--border-radius);
            padding: 3rem;
            text-align: center;
            box-shadow: var(--shadow-lg);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        .contact-icon {
            width: 80px;
            height: 80px;
            background: var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 2rem;
            color: var(--primary-color);
            font-size: 2rem;
        }

        /* Footer */
        .footer {
            background: var(--primary-color);
            color: var(--bg-white);
            padding: 2rem 0;
            text-align: center;
        }

        /* Animations */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: all 0.6s ease;
        }

        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* Responsive */
        @media (max-width: 768px) {
            .hero {
                padding: 120px 0 80px;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .book-cover {
                height: 240px;
            }
        }