/* ==========================================================================
   Fasha Ochea Author Theme - Main Stylesheet
   Color Palette: Denver Broncos Orange (#FB4F14) & Navy (#002244)
   Dark theme with professional author branding
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
    --color-primary: #FB4F14;
    --color-primary-hover: #e04510;
    --color-primary-light: rgba(251, 79, 20, 0.1);
    --color-secondary: #002244;
    --color-secondary-light: #003366;
    --color-dark: #0a0a0f;
    --color-dark-alt: #111118;
    --color-dark-card: #1a1a24;
    --color-dark-border: #2a2a3a;
    --color-text: #e8e8f0;
    --color-text-muted: #9999aa;
    --color-text-light: #ffffff;
    --color-accent-gold: #c9a84c;
    --color-success: #28a745;
    --color-warning: #ffc107;
    --color-danger: #dc3545;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(251, 79, 20, 0.2);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
    --max-width-narrow: 800px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-dark);
    color: var(--color-text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--color-primary-hover);
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    color: var(--color-text-light);
    line-height: 1.3;
    margin-bottom: 0.5em;
}

h1 { font-size: 3rem; font-weight: 700; }
h2 { font-size: 2.25rem; font-weight: 600; }
h3 { font-size: 1.75rem; font-weight: 600; }
h4 { font-size: 1.25rem; font-weight: 500; }

p {
    margin-bottom: 1.25rem;
    color: var(--color-text);
}

/* ---------- Layout ---------- */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.container-narrow {
    max-width: var(--max-width-narrow);
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 5rem 0;
}

.section-dark {
    background-color: var(--color-dark-alt);
}

.section-navy {
    background-color: var(--color-secondary);
}

/* ---------- Header & Navigation ---------- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-dark-border);
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: var(--shadow-md);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1rem 2rem;
}

.site-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-light);
    letter-spacing: 0.02em;
}

.site-logo span {
    color: var(--color-primary);
}

/* Desktop Navigation */
.main-nav ul {
    display: flex;
    list-style: none;
    gap: 0.25rem;
}

.main-nav ul li {
    position: relative;
}

.main-nav ul li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    font-size: 0.9rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.main-nav ul li a:hover,
.main-nav ul li.current-menu-item a {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* Dropdown */
.main-nav ul li ul.sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    flex-direction: column;
    padding: 0.5rem 0;
}

.main-nav ul li:hover ul.sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.main-nav ul li ul.sub-menu li a {
    padding: 0.6rem 1.25rem;
    text-transform: none;
    font-size: 0.85rem;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-light);
    margin: 5px 0;
    transition: var(--transition);
}

/* Cart Icon */
.header-cart {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.cart-icon {
    position: relative;
    color: var(--color-text);
    font-size: 1.2rem;
    padding: 0.5rem;
}

.cart-icon:hover {
    color: var(--color-primary);
}

.cart-count {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--color-primary);
    color: white;
    font-size: 0.65rem;
    font-weight: 700;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ---------- Hero Section ---------- */
.hero {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 8rem 2rem 5rem;
    background: linear-gradient(135deg, var(--color-dark) 0%, var(--color-secondary) 100%);
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(251, 79, 20, 0.05) 0%, transparent 70%);
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero h1 span {
    color: var(--color-primary);
}

.hero p {
    font-size: 1.2rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

/* Page Hero (inner pages) */
.page-hero {
    padding: 10rem 2rem 4rem;
    text-align: center;
    background: linear-gradient(180deg, var(--color-secondary) 0%, var(--color-dark) 100%);
    border-bottom: 1px solid var(--color-dark-border);
}

.page-hero h1 {
    font-size: 2.75rem;
    margin-bottom: 0.5rem;
}

.page-hero .subtitle {
    color: var(--color-text-muted);
    font-size: 1.1rem;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 2rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
}

.btn-primary:hover {
    background: var(--color-primary-hover);
    color: white;
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-light);
    border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.btn-navy {
    background: var(--color-secondary);
    color: white;
    border: 1px solid var(--color-dark-border);
}

.btn-navy:hover {
    background: var(--color-secondary-light);
    color: white;
    transform: translateY(-2px);
}

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.8rem;
}

.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

/* ---------- Book Cards ---------- */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 2rem;
}

.book-card {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.book-card-cover {
    position: relative;
    aspect-ratio: 2/3;
    background: var(--color-secondary);
    overflow: hidden;
}

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

.book-card-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--color-primary);
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
}

.book-card-info {
    padding: 1.25rem;
}

.book-card-info h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
    line-height: 1.4;
}

.book-card-info .series-name {
    font-size: 0.8rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.book-card-info .price {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-light);
}

.book-card-info .price .format {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

/* ---------- Series Section ---------- */
.series-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 2rem;
}

.series-card {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    transition: var(--transition);
}

.series-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.series-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.5rem;
}

.series-card .book-count {
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.series-card .book-list {
    list-style: none;
    margin-bottom: 1.5rem;
}

.series-card .book-list li {
    padding: 0.4rem 0;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    border-bottom: 1px solid var(--color-dark-border);
}

.series-card .book-list li:last-child {
    border-bottom: none;
}

/* ---------- Single Book Page ---------- */
.single-book {
    padding: 8rem 0 5rem;
}

.book-detail {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 3rem;
    align-items: start;
}

.book-cover-large {
    aspect-ratio: 2/3;
    background: var(--color-secondary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

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

.book-meta h1 {
    font-size: 2.5rem;
    margin-bottom: 0.25rem;
}

.book-meta .series-link {
    color: var(--color-primary);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.5rem;
    display: block;
}

.book-meta .synopsis {
    color: var(--color-text);
    margin-bottom: 2rem;
    line-height: 1.8;
}

/* Purchase Options */
.purchase-options {
    background: var(--color-dark-alt);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.purchase-options h4 {
    margin-bottom: 1rem;
    color: var(--color-text-light);
}

.format-options {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.format-option {
    flex: 1;
    min-width: 140px;
    padding: 1rem;
    background: var(--color-dark-card);
    border: 2px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.format-option:hover,
.format-option.active {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.format-option .format-label {
    display: block;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.format-option .format-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-light);
}

.add-to-cart-btn {
    width: 100%;
    justify-content: center;
    padding: 1rem;
    font-size: 1rem;
}

/* Retailer Buttons */
.retailer-section {
    margin-top: 2rem;
}

.retailer-section h4 {
    margin-bottom: 1rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.retailer-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.retailer-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.8rem;
    font-weight: 500;
    transition: var(--transition);
}

.retailer-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.retailer-btn img {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

/* ---------- About Section ---------- */
.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 3rem;
    align-items: start;
}

.author-photo {
    aspect-ratio: 1;
    background: var(--color-dark-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 2px solid var(--color-dark-border);
}

.author-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ---------- Newsletter ---------- */
.newsletter-section {
    background: linear-gradient(135deg, var(--color-secondary) 0%, var(--color-dark) 100%);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: center;
}

.newsletter-form {
    display: flex;
    gap: 0.75rem;
    max-width: 500px;
    margin: 1.5rem auto 0;
}

.newsletter-form input[type="email"] {
    flex: 1;
    padding: 0.85rem 1.25rem;
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 0.9rem;
}

.newsletter-form input[type="email"]:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--color-dark-alt);
    border-top: 1px solid var(--color-dark-border);
    padding: 4rem 0 2rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand .site-logo {
    margin-bottom: 1rem;
    display: block;
}

.footer-brand p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

.footer-links h4 {
    font-family: var(--font-body);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-light);
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links ul li {
    margin-bottom: 0.5rem;
}

.footer-links ul li a {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}

.footer-links ul li a:hover {
    color: var(--color-primary);
}

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

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: 50%;
    color: var(--color-text-muted);
    transition: var(--transition);
}

.footer-social a:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

.footer-bottom {
    border-top: 1px solid var(--color-dark-border);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* ---------- WooCommerce Overrides ---------- */
.woocommerce .products {
    display: grid !important;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)) !important;
    gap: 2rem !important;
}

.woocommerce ul.products li.product {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    padding: 0;
    overflow: hidden;
    transition: var(--transition);
}

.woocommerce ul.products li.product:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.woocommerce ul.products li.product a img {
    margin: 0;
    border-radius: 0;
}

.woocommerce ul.products li.product .woocommerce-loop-product__title {
    font-family: var(--font-heading);
    color: var(--color-text-light);
    padding: 1rem 1.25rem 0.25rem;
    font-size: 1rem;
}

.woocommerce ul.products li.product .price {
    color: var(--color-text-light);
    padding: 0 1.25rem;
    font-weight: 700;
}

.woocommerce ul.products li.product .button {
    background: var(--color-primary);
    color: white;
    border-radius: 0;
    margin: 1rem 1.25rem;
    padding: 0.6rem 1.25rem;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

.woocommerce ul.products li.product .button:hover {
    background: var(--color-primary-hover);
}

/* WooCommerce Cart */
.woocommerce-cart .woocommerce {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    padding: 2rem;
}

.woocommerce table.shop_table {
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
}

.woocommerce table.shop_table th {
    background: var(--color-secondary);
    color: var(--color-text-light);
    border: none;
    padding: 1rem;
}

.woocommerce table.shop_table td {
    background: var(--color-dark-card);
    color: var(--color-text);
    border-color: var(--color-dark-border);
    padding: 1rem;
}

.woocommerce .cart_totals {
    background: var(--color-dark-alt);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    padding: 1.5rem;
}

.woocommerce a.checkout-button,
.woocommerce #place_order {
    background: var(--color-primary) !important;
    color: white !important;
    border-radius: var(--radius-sm) !important;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.woocommerce a.checkout-button:hover,
.woocommerce #place_order:hover {
    background: var(--color-primary-hover) !important;
}

/* WooCommerce Forms */
.woocommerce form .form-row input.input-text,
.woocommerce form .form-row textarea,
.woocommerce form .form-row select {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
}

.woocommerce form .form-row input.input-text:focus,
.woocommerce form .form-row textarea:focus {
    border-color: var(--color-primary);
    outline: none;
}

/* ---------- Contact Form ---------- */
.contact-form {
    max-width: 600px;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.85rem 1.25rem;
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
}

/* ---------- Blog ---------- */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.blog-card {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition);
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.blog-card-image {
    aspect-ratio: 16/9;
    background: var(--color-secondary);
    overflow: hidden;
}

.blog-card-content {
    padding: 1.5rem;
}

.blog-card-content .date {
    font-size: 0.8rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.blog-card-content h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.blog-card-content p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* ---------- FAQ Accordion ---------- */
.faq-item {
    background: var(--color-dark-card);
    border: 1px solid var(--color-dark-border);
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    overflow: hidden;
}

.faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--color-text-light);
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--color-primary);
}

.faq-question .icon {
    font-size: 1.5rem;
    transition: var(--transition);
    color: var(--color-primary);
}

.faq-item.active .faq-question .icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 1.5rem 1.25rem;
    color: var(--color-text-muted);
    display: none;
    line-height: 1.8;
}

.faq-item.active .faq-answer {
    display: block;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .book-detail {
        grid-template-columns: 280px 1fr;
        gap: 2rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    
    .main-nav {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 10, 15, 0.98);
        z-index: 999;
        padding: 5rem 2rem 2rem;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
    }
    
    .main-nav ul li a {
        padding: 1rem;
        font-size: 1.1rem;
        border-bottom: 1px solid var(--color-dark-border);
    }
    
    .main-nav ul li ul.sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border: none;
        background: transparent;
        padding-left: 1rem;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero {
        min-height: 60vh;
        padding: 7rem 1.5rem 4rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .book-detail {
        grid-template-columns: 1fr;
    }
    
    .book-cover-large {
        max-width: 300px;
        margin: 0 auto;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .author-photo {
        max-width: 250px;
        margin: 0 auto;
    }
    
    .series-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .newsletter-form {
        flex-direction: column;
    }
    
    .retailer-buttons {
        flex-direction: column;
    }
    
    .format-options {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .section {
        padding: 3rem 0;
    }
    
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
}