/* ============================================================================
   EDICIONES INSURRECTAS — Hoja de estilos principal
   Paleta: tonalidades de azul (de azul claro a azul oscuro y negro)
   Tipografía: Calibri / Carlito (sans-serif)
   ============================================================================ */

:root {
    --color-bg: #e8f1fa;
    --color-surface: #ffffff;
    --color-surface-alt: #f0f6fc;
    --color-text: #0a1929;
    --color-text-light: #2c4a6b;
    --color-text-muted: #5a7a99;
    --color-primary: #0a1929;
    --color-primary-dark: #050d15;
    --color-primary-light: #1b3a5b;
    --color-accent: #1976d2;
    --color-accent-dark: #0d47a1;
    --color-accent-light: #64b5f6;
    --color-border: #b8d0e3;
    --color-border-light: #d6e4f0;
    --color-danger: #c62828;
    --color-success: #2e7d32;
    --color-warning-bg: #fff8e1;
    --color-warning-border: #ffa000;

    --font-display: 'Calibri', 'Carlito', 'Segoe UI', 'Helvetica Neue', sans-serif;
    --font-body: 'Calibri', 'Carlito', 'Segoe UI', 'Helvetica Neue', sans-serif;

    --radius: 6px;
    --radius-sm: 4px;
    --transition: 0.2s ease;

    --max-width: 1200px;
    --sidebar-width: 280px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

/* ============================================================================
   TOP BAR — barra superior blanca
   ============================================================================ */
.top-bar {
    background: #ffffff;
    border-bottom: 1px solid var(--color-border-light);
    padding: 0.4rem 0;
}

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

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.btn-contactar {
    background: var(--color-accent);
    color: #ffffff !important;
    padding: 0.3rem 1.2rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: background var(--transition);
}
.btn-contactar:hover { background: var(--color-accent-dark); }

.top-nav-list {
    list-style: none;
    display: flex;
    gap: 1.2rem;
    align-items: right;
}

.top-nav-list > li {
    position: relative;
align: right;
}

.top-nav-list > li > a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.3rem 0;
    display: block;
}
.top-nav-list > li > a:hover { color: var(--color-accent); }

.dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #ffffff;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border-radius: var(--radius-sm);
    list-style: none;
    min-width: 200px;
    z-index: 1000;
    padding: 0.3rem 0;
}

.has-dropdown:hover .dropdown,
.has-dropdown:focus-within .dropdown {
    display: block;
}

.dropdown li a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.85rem;
    transition: background var(--transition);
}
.dropdown li a:hover {
    background: var(--color-surface-alt);
    color: var(--color-accent);
}

.top-bar-right {
    display: flex;
    align-items: right;
    gap: 0.8rem;
}

.social-icon {
    color: var(--color-text-light);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.3rem;
    transition: color var(--transition);
}
.social-icon:hover { color: var(--color-accent); }

/* ============================================================================
   HEADER — banner con logo y fondo
   ============================================================================ */
.site-header {
    background: linear-gradient(135deg, #050d15 0%, #0a1929 30%, #0d2847 60%, #1b3a5b 100%);
    min-height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.site-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: url('/assets/img/banner-header.jpg');
    background-size: cover;
    background-position: center;
    
}

.header-inner {
    position: relative;
    z-index: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-logo-link {
    display: block;
}

.header-logo-img {
    max-height: 180px;
    width: auto;
    display: block;
    margin: 0 auto;
}

.header-cart {
    flex-shrink: 0;
    position: absolute;
    right: 2rem;
    top: 50%;
    transform: translateY(-50%);
}

.cart-link {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: rgba(100, 181, 246, 0.2);
    color: #ede134;
    transition: background var(--transition);
}
.cart-link:hover {
    background: rgba(100, 181, 246, 0.4);
    color: #ffffff;
}

.cart-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: #64b5f6;
    color: #0a1929;
    font-size: 12px;
    font-weight: 700;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ============================================================================
   NAVEGACIÓN
   ============================================================================ */
.main-nav {
    background: #000000;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

.nav-list {
    display: flex;
    list-style: none;
    flex-wrap: nowrap;
    gap: 0;
    overflow-x: auto;
}

.nav-list li a {
    display: block;
    padding: 0.7rem 0.9rem;
    color: #fff;
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    border-bottom: 3px solid transparent;
    transition: all var(--transition);
    white-space: nowrap;
}

.nav-list li a:hover {
    color: #64b5f6;
    border-bottom-color: #64b5f6;
    background: rgba(100, 181, 246, 0.08);
}

/* ============================================================================
   LAYOUT DE CONTENIDO
   ============================================================================ */
.content-wrapper {
    flex: 1;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
}

.content-with-sidebar {
    flex: 1;
    display: flex;
    max-width: var(--max-width);
    width: 100%;
    margin: 0 auto;
    padding: 2rem;
    gap: 2rem;
}

.content-with-sidebar .main-content {
    flex: 1;
    min-width: 0;
}

/* ============================================================================
   SIDEBAR DERECHO
   ============================================================================ */
.sidebar-right {
    width: var(--sidebar-width);
    flex-shrink: 0;
}

.sidebar-right h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--color-primary);
    margin-bottom: 0.8rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
}

.sidebar-search,
.sidebar-nav,
.sidebar-contact {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.search-form {
    display: flex;
    gap: 0.5rem;
}

.search-form input {
    flex: 1;
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-family: var(--font-body);
}

.search-form input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.search-form button {
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 0.5rem 0.8rem;
    cursor: pointer;
    transition: background var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}
.search-form button:hover { background: var(--color-accent-dark); }

.sidebar-nav ul {
    list-style: none;
}

.sidebar-nav ul li {
    border-bottom: 1px solid var(--color-border);
}

.sidebar-nav ul li:last-child { border-bottom: none; }

.sidebar-nav ul li a {
    display: block;
    padding: 0.6rem 0;
    font-weight: 500;
    font-size: 0.95rem;
}

.sidebar-contact p {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.4rem;
}

/* ============================================================================
   GRID DE LIBROS
   ============================================================================ */
.books-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 2rem;
}

.book-card {
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}

.book-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.book-cover {
    aspect-ratio: 2/3;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 8px;
}

.book-cover-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    text-align: center;
    position: relative;
}

.book-cover-placeholder::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
}

.book-cover-placeholder span {
    position: relative;
    z-index: 1;
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: #b3d4f0;
    line-height: 1.3;
    text-shadow: 0 1px 8px rgba(0,0,0,0.7);
}

.book-info {
    padding: 1.2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-title {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    line-height: 1.3;
}

.book-title a {
    color: var(--color-primary);
}

.book-genre {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-accent);
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.book-author {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-bottom: 0.8rem;
}

.book-price {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-top: auto;
}

.book-price small {
    font-size: 0.7rem;
    font-weight: 400;
    color: var(--color-text-light);
    display: block;
}

/* ============================================================================
   PAGINACIÓN
   ============================================================================ */
.pagination {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    margin: 2rem 0;
}

.pagination a,
.pagination span {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.8rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    background: var(--color-surface);
}

.pagination a:hover {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.pagination .current {
    background: var(--color-accent);
    color: #fff;
    border-color: var(--color-accent);
}

.pagination .disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ============================================================================
   DETALLE DE LIBRO
   ============================================================================ */
.book-detail {
    display: grid;
    grid-template-columns: 350px 1fr;
    gap: 3rem;
    align-items: start;
}

.book-detail-cover {
    border-radius: var(--radius);
    aspect-ratio: 2/3;
    overflow: hidden;
    box-shadow: 0 8px 30px rgba(0,0,0,0.2);
}

.book-detail-cover img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 12px;
}

.book-detail-info h2 {
    font-family: var(--font-display);
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.book-detail-genre {
    display: inline-block;
    background: var(--color-accent);
    color: #ffffff;
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 1rem;
}

.book-detail-author {
    font-size: 1.1rem;
    color: var(--color-text-light);
    margin-bottom: 1.5rem;
}

.book-detail-summary {
    margin-bottom: 2rem;
    line-height: 1.8;
}

.book-detail-price {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.book-detail-price small {
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--color-text-light);
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 700;
    font-family: var(--font-body);
    cursor: pointer;
    transition: all var(--transition);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--color-accent);
    color: #ffffff;
}
.btn-primary:hover {
    background: var(--color-accent-dark);
    color: #fff;
}

.btn-dark {
    background: var(--color-primary);
    color: #fff;
}
.btn-dark:hover {
    background: var(--color-primary-light);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}
.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
}

.btn-danger {
    background: var(--color-danger);
    color: #fff;
}

.btn-block { width: 100%; }

/* ============================================================================
   CARRITO
   ============================================================================ */
.cart-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2rem;
}

.cart-table th {
    text-align: left;
    padding: 1rem;
    background: var(--color-primary);
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
}

.cart-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    vertical-align: middle;
}

.cart-table .cart-item-title {
    font-family: var(--font-display);
    font-weight: 700;
}

.cart-table .cart-item-author {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.cart-qty {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.cart-qty input {
    width: 60px;
    padding: 0.3rem;
    text-align: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
}

.cart-summary {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    max-width: 400px;
    margin-left: auto;
}

.cart-summary h3 {
    font-family: var(--font-display);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
}

.cart-summary-row {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    font-size: 1rem;
}

.cart-summary-total {
    border-top: 2px solid var(--color-primary);
    margin-top: 0.5rem;
    padding-top: 1rem;
    font-weight: 700;
    font-size: 1.3rem;
}

/* ============================================================================
   CHECKOUT
   ============================================================================ */
.checkout-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

.checkout-section {
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.checkout-section h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 0.3rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.6rem 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: var(--font-body);
}

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

.form-group input[type="checkbox"] {
    width: auto;
}

.payment-method {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.payment-option {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 1rem;
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: border-color var(--transition);
}

.payment-option:hover { border-color: var(--color-accent); }

.payment-option input { margin-top: 4px; }

.payment-option-label {
    font-weight: 700;
    display: block;
    margin-bottom: 0.2rem;
}

.payment-option-detail {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.privacy-box {
    background: var(--color-warning-bg);
    padding: 1.5rem;
    border-radius: var(--radius);
    border-left: 4px solid var(--color-warning-border);
    margin: 1.5rem 0;
}

.privacy-box h4 {
    margin-bottom: 0.8rem;
}

.privacy-box textarea {
    width: 100%;
    height: 200px;
    overflow-y: auto;
    background: #fff;
    padding: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    line-height: 1.5;
    margin-bottom: 0.8rem;
    resize: vertical;
}

/* ============================================================================
   PÁGINAS ESTÁTICAS
   ============================================================================ */
.page-content {
    max-width: 800px;
}

.page-content h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
}

.page-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
}

.page-photos {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin: 2rem 0;
}

.page-photo {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #0a1929, #0d2847);
    border-radius: var(--radius);
    overflow: hidden;
}

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

/* ============================================================================
   ALERTAS
   ============================================================================ */
.alert {
    padding: 1rem 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    border-color: var(--color-success);
    color: #155724;
}

.alert-error {
    background: #f8d7da;
    border-color: var(--color-danger);
    color: #721c24;
}

.alert-info {
    background: #d1ecf1;
    border-color: #0c5460;
    color: #0c5460;
}

/* ============================================================================
   EMPTY STATE
   ============================================================================ */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-light);
}

.empty-state h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* ============================================================================
   FOOTER
   ============================================================================ */
.site-footer {
    background: linear-gradient(180deg, #0a1929 0%, #050d15 100%);
    color: #b3d4f0;
    padding: 3rem 0 0;
    margin-top: auto;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.footer-col h4 {
    font-family: var(--font-display);
    color: #64b5f6;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.5rem; }
.footer-col ul li a { color: #8ab8e0; }
.footer-col ul li a:hover { color: #64b5f6; }
.footer-col p { font-size: 0.9rem; line-height: 1.6; }

.footer-bottom {
    max-width: var(--max-width);
    margin: 2rem auto 0;
    padding: 1.5rem 2rem;
    border-top: 1px solid rgba(100, 181, 246, 0.15);
    text-align: center;
    font-size: 0.85rem;
    color: #5a7a99;
}

/* ============================================================================
   ADMIN PANEL
   ============================================================================ */
.admin-bar {
    background: linear-gradient(90deg, #050d15, #0a1929);
    color: #b3d4f0;
    padding: 0.8rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-bar a {
    color: #64b5f6;
    font-weight: 600;
}

.admin-layout {
    display: flex;
    min-height: calc(100vh - 60px);
}

.admin-sidebar {
    width: 240px;
    background: #0d2847;
    color: #fff;
    padding: 2rem 0;
    flex-shrink: 0;
}

.admin-sidebar h3 {
    padding: 0 1.5rem;
    font-family: var(--font-display);
    color: #64b5f6;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.admin-sidebar ul {
    list-style: none;
}

.admin-sidebar ul li a {
    display: block;
    padding: 0.7rem 1.5rem;
    color: rgba(255,255,255,0.8);
    font-weight: 500;
    border-left: 3px solid transparent;
    transition: all var(--transition);
}

.admin-sidebar ul li a:hover,
.admin-sidebar ul li a.active {
    background: rgba(100,169,246,0.12);
    border-left-color: #64b5f6;
    color: #64b5f6;
}

.admin-content {
    flex: 1;
    padding: 2rem;
    background: var(--color-bg);
}

.admin-content h2 {
    font-family: var(--font-display);
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
}

.admin-table {
    width: 100%;
    background: var(--color-surface);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.admin-table th {
    text-align: left;
    padding: 1rem;
    background: linear-gradient(90deg, #0a1929, #0d2847);
    color: #fff;
    font-weight: 600;
    font-size: 0.85rem;
    text-transform: uppercase;
}

.admin-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
}

.admin-table tr:last-child td { border-bottom: none; }

.admin-actions {
    display: flex;
    gap: 0.5rem;
}

.admin-actions a {
    padding: 0.3rem 0.6rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
}

.admin-actions .edit {
    background: var(--color-accent);
    color: #ffffff;
}

.admin-actions .delete {
    background: var(--color-danger);
    color: #fff;
}

.admin-form {
    max-width: 700px;
    background: var(--color-surface);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.admin-form .form-group label {
    font-weight: 600;
}

.admin-login {
    max-width: 400px;
    margin: 5rem auto;
    background: var(--color-surface);
    padding: 2.5rem;
    border-radius: var(--radius);
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
}

.admin-login h2 {
    font-family: var(--font-display);
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
}

.admin-dashboard {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--color-surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    text-align: center;
}

.stat-card .stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-card .stat-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ============================================================================
   LOGIN
   ============================================================================ */
.login-form .form-group input {
    padding: 0.8rem;
}

/* ============================================================================
   NAV TOGGLE — botón hamburguesa (solo móvil)
   ============================================================================ */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    width: 40px;
    height: 40px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 3px;
    background: #ffffff;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
}
.nav-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 900px) {
    .nav-inner {
        padding: 0.5rem 1rem;
    }

    .books-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .book-detail {
        grid-template-columns: 1fr;
    }

    .book-detail-cover {
        max-width: 300px;
        margin: 0 auto;
    }

    .checkout-form {
        grid-template-columns: 1fr;
    }

    .content-with-sidebar {
        flex-direction: column;
    }

    .sidebar-right {
        width: 100%;
        order: -1;
    }

    .footer-inner {
        grid-template-columns: repeat(2, 1fr);
    }

    .admin-layout {
        flex-direction: column;
    }

    .admin-sidebar {
        width: 100%;
    }

    .admin-sidebar ul {
        display: flex;
        flex-wrap: wrap;
    }

    .admin-sidebar ul li a {
        padding: 0.5rem 1rem;
    }

    .admin-dashboard {
        grid-template-columns: 1fr;
    }

    /* Top bar responsive */
    .top-nav-list {
        display: none;
    }

    .top-bar-inner {
        justify-content: center;
    }

    .header-logo-img {
        max-height: 130px;
    }

    .site-header {
        min-height: 200px;
    }
}

@media (max-width: 600px) {
    .books-grid {
        grid-template-columns: 1fr;
    }

    .header-inner {
        flex-direction: column;
        text-align: center;
    }

    .nav-list {
        flex-direction: column;
        display: none;
    }

    .nav-list.nav-open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-list li a {
        padding: 0.7rem 1rem;
    }

    .footer-inner {
        grid-template-columns: 1fr;
    }

    .cart-table {
        font-size: 0.85rem;
    }

    .cart-table th,
    .cart-table td {
        padding: 0.5rem;
    }

    .header-logo-img {
        max-height: 100px;
    }

    .site-header {
        min-height: 160px;
    }

    .header-cart {
        right: 1rem;
    }

    .top-bar-right .social-icon {
        padding: 0.2rem;
    }

    .btn-contactar {
        padding: 0.2rem 0.8rem;
        font-size: 0.75rem;
    }
}