/* ============================================
   POKER TUTORIAL SHOP - PROFESSIONAL EDITION
   Premium Dark Theme with Red/Gold Accents
   ============================================ */

/* ============================================
   1. RESET & BASE
   ============================================ */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=Playfair+Display:wght@600;700&display=swap');

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   2. CSS VARIABLES - POKER DARK THEME
   ============================================ */
:root {
    /* Primary Colors - Rich Red (Poker) */
    --primary: #dc2626;
    --primary-dark: #b91c1c;
    --primary-light: #ef4444;
    --primary-lighter: #f87171;

    /* Accent Colors - Gold */
    --accent: #d4a012;
    --accent-light: #eab308;
    --accent-dark: #a47d0c;

    /* Secondary Colors */
    --secondary: #374151;
    --secondary-dark: #1f2937;
    --secondary-light: #4b5563;

    /* Status Colors */
    --success: #059669;
    --success-light: #10b981;
    --warning: #d97706;
    --warning-light: #f59e0b;
    --danger: #dc2626;
    --danger-light: #ef4444;
    --info: #0891b2;

    /* Background Colors - Deep Dark */
    --bg-primary: #0a0a0b;
    --bg-secondary: #111113;
    --bg-tertiary: #1a1a1d;
    --bg-card: #131316;
    --bg-elevated: #1f1f23;

    /* Text Colors */
    --text-primary: #f5f5f5;
    --text-secondary: #9ca3af;
    --text-tertiary: #6b7280;
    --text-muted: #4b5563;
    --text-inverse: #0a0a0b;

    /* Gray Scale */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* Border Colors */
    --border-primary: #1f1f23;
    --border-secondary: #2a2a2f;
    --border-tertiary: #1f1f23;
    --border-hover: #3a3a40;
    --border-accent: rgba(220, 38, 38, 0.3);

    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.5);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.5);
    --shadow-2xl: 0 20px 40px rgba(0, 0, 0, 0.6);
    --shadow-glow: 0 0 20px rgba(220, 38, 38, 0.15);

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-2xl: 16px;
    --radius-full: 9999px;

    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-base: 180ms ease;
    --transition-slow: 250ms ease;
    --transition-slower: 350ms ease;

    /* Z-Index Scale */
    --z-dropdown: 1000;
    --z-sticky: 1100;
    --z-fixed: 1200;
    --z-modal-backdrop: 1300;
    --z-modal: 1400;
    --z-popover: 1500;
    --z-tooltip: 1600;

    /* Container Widths */
    --container-sm: 640px;
    --container-md: 768px;
    --container-lg: 1024px;
    --container-xl: 1280px;
    --container-2xl: 1400px;
}

/* ============================================
   3. UTILITY CLASSES
   ============================================ */
.container {
    width: 100%;
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--space-4);
    padding-right: var(--space-4);
}

@media (min-width: 640px) {
    .container {
        max-width: var(--container-sm);
        padding-left: var(--space-6);
        padding-right: var(--space-6);
    }
}

@media (min-width: 768px) {
    .container {
        max-width: var(--container-md);
    }
}

@media (min-width: 1024px) {
    .container {
        max-width: var(--container-lg);
    }
}

@media (min-width: 1280px) {
    .container {
        max-width: var(--container-xl);
    }
}

@media (min-width: 1536px) {
    .container {
        max-width: var(--container-2xl);
    }
}

/* Screen Reader Only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ============================================
   4. NAVIGATION - POKER THEME
   ============================================ */
.navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 5.5rem;
    position: relative;
}

.nav-brand {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

.nav-brand a {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

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

.nav-toggle {
    display: none;
    padding: var(--space-2);
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.25rem;
}

.nav-toggle:hover {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.nav-menu a {
    padding: var(--space-2) var(--space-3);
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.nav-menu a:hover {
    color: var(--primary-light);
    background: var(--bg-tertiary);
}

.nav-menu a i {
    font-size: 1rem;
    opacity: 0.7;
}

/* Category Navigation */
.category-navbar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-primary);
    padding: var(--space-3) 0;
}

.category-nav-menu {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    justify-content: center;
    align-items: center;
}

.category-nav-item {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    background: transparent;
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.category-nav-item:hover,
.category-nav-item:focus {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.category-nav-item:active {
    background: var(--bg-elevated);
}

.category-nav-more {
    color: var(--primary);
    font-weight: 600;
}

.category-nav-more:hover {
    color: var(--primary-light);
}

/* ============================================
   5. HERO SECTION
   ============================================ */
.main-content {
    min-height: calc(100vh - 12rem);
    padding: var(--space-8) 0;
}

.hero-wrapper {
    margin-bottom: var(--space-12);
}

.hero {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    padding: var(--space-16) var(--space-8);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    padding: var(--space-2) var(--space-4);
    background: rgba(220, 38, 38, 0.1);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-full);
    color: var(--primary-light);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-6);
}

.hero h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: var(--space-5);
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.hero p {
    font-size: clamp(1rem, 2vw, 1.25rem);
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 40rem;
    margin: 0 auto var(--space-8);
}

.hero-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-4);
    justify-content: center;
}

/* ============================================
   6. CONTENT SECTIONS
   ============================================ */
.content-section-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
    margin-bottom: var(--space-8);
}

.section-header {
    margin-bottom: var(--space-8);
    text-align: center;
}

.section-header h2 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.75rem, 3vw, 2.25rem);
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    margin-bottom: var(--space-3);
}

.section-divider {
    width: 4rem;
    height: 2px;
    background: var(--primary);
    border-radius: var(--radius-full);
    margin: 0 auto;
}

/* ============================================
   7. NEWS SECTION
   ============================================ */
.news-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.news-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.news-item:hover {
    border-color: var(--border-hover);
    background: var(--bg-elevated);
}

.news-item-content {
    display: flex;
    align-items: center;
    gap: var(--space-5);
    padding: var(--space-5);
}

.news-item-image {
    flex-shrink: 0;
    width: 120px;
    height: 90px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-primary);
}

.news-item-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-item-details {
    flex: 1;
    min-width: 0;
}

.news-item-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-2);
}

.news-item-header h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    line-height: 1.4;
    color: var(--text-primary);
    margin: 0;
}

.news-excerpt {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-date {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    background: var(--bg-primary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    color: var(--text-tertiary);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.news-item-hidden {
    display: none;
}

.news-toggle-wrapper {
    margin-top: var(--space-6);
    text-align: center;
}

/* ============================================
   8. GRID LAYOUTS
   ============================================ */
.category-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
}

.product-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-6);
}

@media (min-width: 640px) {
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .product-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (min-width: 1280px) {
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    .product-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

/* ============================================
   9. CARDS
   ============================================ */
.category-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
    text-decoration: none;
}

.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.product-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

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

.category-image-wrapper {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    position: relative;
    width: 100%;
    background: #0a0a0b;
    padding: 10px 10px 0 10px;
}

.category-placeholder {
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 2rem;
}

.product-image-link {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    position: relative;
    width: 100%;
    background: #0a0a0b;
    display: block;
    padding: 8px 8px 0 8px;
}

/* Fallback for browsers without aspect-ratio support */
@supports not (aspect-ratio: 1 / 1) {
    .category-image-wrapper {
        aspect-ratio: 4/3;
    }

    .product-image-link {
    aspect-ratio: 4 / 3;
    overflow: hidden;
        height: 0;
        padding-bottom: 75%;
        position: relative;
    }

    .category-image-wrapper img,
    .product-image-link img {
        position: absolute;
        top: 0;
        left: 0;
    }
}

.category-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.product-image-link img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image-link img {
    transform: scale(1.03);
}

/* Product Badge */
.product-badge {
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    padding: var(--space-1) var(--space-3);
    border-radius: var(--radius-sm);
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.product-badge.in-stock {
    background: var(--success);
    color: white;
}

.product-badge.out-of-stock {
    background: var(--bg-tertiary);
    color: var(--text-tertiary);
}

.product-placeholder {
    width: 100%;
    height: 100%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 3rem;
}

.category-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-3) var(--space-4);
}

.category-content h3 {
    font-size: 0.9rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.category-content p {
    color: var(--text-tertiary);
    font-size: 0.75rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--space-5);
}

.product-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    line-height: 1.4;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.product-info h3 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

.product-info h3 a:hover {
    color: var(--primary);
}

.product-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--space-4);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-footer {
    margin-top: auto;
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-tertiary);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.product-price-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.product-price {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
}

.product-stock {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.in-stock {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.out-of-stock {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
}

.product-info .btn {
    width: 100%;
}

/* ============================================
   10. BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.5;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-secondary);
}

.btn-secondary:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-hover);
}

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

.btn-danger:hover {
    background: var(--danger-light);
}

.btn-block {
    width: 100%;
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: 1rem;
}

.btn i {
    font-size: 1.125em;
}

/* ============================================
   11. FORMS
   ============================================ */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
    padding: var(--space-4);
}

.auth-box {
    width: 100%;
    max-width: 26rem;
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
}

.auth-box h2 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.75rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--space-6);
    color: var(--text-primary);
}

.form-group {
    margin-bottom: var(--space-5);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-tertiary);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.auth-link {
    margin-top: var(--space-6);
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.auth-link a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 700;
    transition: color var(--transition-base);
}

.auth-link a:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

/* ============================================
   12. PRODUCT DETAIL
   ============================================ */
.product-detail {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-8);
}

@media (min-width: 1024px) {
    .product-detail {
        grid-template-columns: 1fr 1fr;
    }
}

.product-images {
    position: relative;
}

.product-images .main-image {
    width: 100%;
    border-radius: var(--radius-lg);
}

.product-placeholder-large {
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-secondary);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-weight: 500;
    font-size: 1rem;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

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

.product-details h1 {
    font-size: clamp(1.5rem, 4vw, 2.25rem);
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.product-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-6);
}

.category-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.8125rem;
    font-weight: 500;
}

.stock-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
}

.product-price-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-bottom: var(--space-6);
}

.product-price-box .price {
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 700;
    color: var(--accent);
}

.product-description {
    margin-bottom: var(--space-6);
}

.product-description h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.product-description p {
    color: var(--text-secondary);
    line-height: 1.75;
    font-size: 0.9375rem;
}

.quantity-selector {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.quantity-selector label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
}

.quantity-selector input {
    width: 100px;
    padding: var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
    text-align: center;
    transition: all var(--transition-base);
}

.quantity-selector input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.product-info-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-top: var(--space-5);
}

.product-info-box h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.product-info-box ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.product-info-box ul li {
    padding: var(--space-3) 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    border-bottom: 1px solid var(--border-tertiary);
}

.product-info-box ul li:last-child {
    border-bottom: none;
}

/* ============================================
   13. CART
   ============================================ */
.page-header-cart {
    text-align: center;
    padding: var(--space-8) 0;
}

.page-header-cart h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.75rem, 4vw, 2.25rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

.page-header-cart h1 i {
    color: var(--primary);
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    font-weight: 500;
}

.cart-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

@media (min-width: 1024px) {
    .cart-container {
        grid-template-columns: 2fr 1fr;
    }
}

.cart-items-wrapper,
.cart-summary-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.cart-section-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-tertiary);
    padding: var(--space-5) var(--space-6);
}

.cart-section-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: 0;
}

.cart-section-header h2 i {
    color: var(--text-secondary);
}

.cart-items {
    padding: 0;
}

.cart-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-5);
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-tertiary);
    transition: background var(--transition-base);
}

@media (min-width: 640px) {
    .cart-item {
        grid-template-columns: 100px 1fr auto auto auto;
        align-items: center;
    }
}

.cart-item:hover {
    background: var(--bg-secondary);
}

.cart-item:last-child {
    border-bottom: none;
}

.cart-item-image img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.product-placeholder-small {
    width: 100px;
    height: 100px;
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
    font-size: 1.25rem;
}

.cart-item-details h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.cart-item-details p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-2);
}

.cart-item-price {
    text-align: right;
}

.cart-item-price .price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--accent);
}

.cart-item-price .unit-price {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.cart-item-quantity {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.quantity-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stock-info {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    font-weight: 500;
}

.stock-info i {
    color: var(--text-tertiary);
    margin-right: var(--space-1);
}

.quantity-controls {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-full);
    padding: var(--space-2);
}

.quantity-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: 50%;
    color: var(--text-primary);
    font-size: 1.125rem;
    font-weight: 800;
    cursor: pointer;
    transition: all var(--transition-base);
}

.quantity-btn:hover:not(:disabled) {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
}

.quantity-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.quantity-value {
    min-width: 40px;
    text-align: center;
    font-size: 1.125rem;
    font-weight: 800;
    color: var(--text-primary);
}

.cart-summary {
    background: transparent;
    padding: 0;
    border: none;
}

.summary-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-tertiary);
    padding: var(--space-5) var(--space-6);
}

.summary-header h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: 0;
}

.summary-header h3 i {
    color: var(--text-secondary);
}

.summary-details {
    padding: var(--space-6);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-tertiary);
    font-size: 1rem;
    color: var(--text-primary);
}

.summary-row i {
    color: var(--text-tertiary);
    margin-right: var(--space-2);
}

.summary-value {
    font-weight: 700;
    color: var(--text-primary);
}

.summary-row.subtotal {
    font-size: 1.125rem;
}

.summary-row.total {
    font-size: 1.25rem;
    font-weight: 600;
    border-top: 1px solid var(--border-secondary);
    border-bottom: none;
    padding-top: var(--space-5);
    margin-top: var(--space-4);
}

.summary-row.total .price {
    color: var(--accent);
}

.summary-info-box {
    margin: var(--space-5) var(--space-6);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    display: flex;
    gap: var(--space-3);
}

.summary-info-box i {
    flex-shrink: 0;
    color: var(--text-tertiary);
    font-size: 1.25rem;
    margin-top: var(--space-1);
}

.summary-info-box strong {
    display: block;
    color: var(--text-primary);
    font-size: 0.9375rem;
    margin-bottom: var(--space-1);
}

.summary-info-box p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin: 0;
}

.summary-actions {
    padding: 0 var(--space-6) var(--space-6);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.empty-cart {
    text-align: center;
    padding: var(--space-16) var(--space-6);
}

.empty-cart-icon {
    font-size: 5rem;
    color: var(--gray-600);
    margin-bottom: var(--space-6);
    opacity: 0.5;
}

.empty-cart h2 {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.empty-cart p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    margin-bottom: var(--space-8);
    max-width: 32rem;
    margin-left: auto;
    margin-right: auto;
}

.empty-cart .btn {
    min-width: 200px;
}

/* ============================================
   14. CHECKOUT
   ============================================ */
.checkout-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

@media (min-width: 1024px) {
    .checkout-container {
        grid-template-columns: 2fr 1fr;
    }
}

.checkout-items-wrapper,
.payment-selection-wrapper {
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.checkout-section-header,
.payment-section-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-tertiary);
    padding: var(--space-5) var(--space-6);
}

.checkout-section-header h2,
.payment-section-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin: 0;
}

.checkout-section-header h2 i,
.payment-section-header h2 i {
    color: var(--text-secondary);
}

.checkout-items {
    padding: 0;
}

.checkout-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-tertiary);
    transition: background var(--transition-base);
}

@media (min-width: 640px) {
    .checkout-item {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.checkout-item:hover {
    background: var(--bg-secondary);
}

.checkout-item:last-child {
    border-bottom: none;
}

.checkout-item-image {
    flex-shrink: 0;
}

.checkout-item-image img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

.checkout-item .item-info {
    flex: 1;
}

.checkout-item .item-info h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.checkout-item .item-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--space-1);
}

.checkout-item .item-info .item-quantity {
    color: var(--text-primary);
    font-weight: 600;
}

.checkout-item .item-price {
    text-align: right;
    flex-shrink: 0;
}

.checkout-item .item-price .price {
    display: block;
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: var(--space-1);
}

.checkout-item .item-price .unit-price {
    color: var(--text-tertiary);
    font-size: 0.75rem;
}

.checkout-total-box {
    padding: var(--space-6);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-tertiary);
}

.checkout-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 600;
}

.checkout-total i {
    color: var(--text-tertiary);
    margin-right: var(--space-2);
}

.checkout-total .price {
    color: var(--accent);
}

.payment-selection {
    padding: var(--space-6);
}

.crypto-options-header {
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-tertiary);
}

.crypto-options-header h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.crypto-options-header h3 i {
    color: var(--text-secondary);
}

.crypto-options-header p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin: 0;
}

.crypto-options {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
    .crypto-options {
        grid-template-columns: repeat(2, 1fr);
    }
}

.crypto-option {
    position: relative;
    display: flex;
    align-items: center;
    padding: var(--space-5);
    background: var(--bg-secondary);
    border: 2px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.crypto-option:hover {
    border-color: var(--border-hover);
    background: var(--bg-tertiary);
}

.crypto-option input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.crypto-content {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    width: 100%;
}

.crypto-icon {
    flex-shrink: 0;
    font-size: 2rem;
    color: var(--text-secondary);
    transition: color var(--transition-base);
}

.crypto-info {
    flex: 1;
}

.crypto-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.crypto-code {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.crypto-option:has(input[type="radio"]:checked) {
    border-color: var(--primary);
    background: var(--bg-tertiary);
}

.crypto-option:has(input[type="radio"]:checked) .crypto-icon {
    color: var(--primary);
}

.crypto-option:has(input[type="radio"]:checked)::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    top: var(--space-3);
    right: var(--space-3);
    color: var(--primary);
    font-size: 1.25rem;
}

/* ============================================
   15. FLASH MESSAGES
   ============================================ */
.flash-messages {
    position: fixed;
    top: var(--space-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-tooltip);
    max-width: 36rem;
    width: calc(100% - var(--space-8));
}

.alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    margin-bottom: var(--space-3);
    border-radius: var(--radius-lg);
    border-left: 4px solid;
    font-weight: 600;
    font-size: 1rem;
    background: var(--bg-secondary);
    box-shadow: var(--shadow-lg);
    animation: slideInDown 0.3s ease-out;
}

@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.alert-success {
    border-left-color: var(--success);
    color: var(--text-primary);
}

.alert-error {
    border-left-color: var(--danger);
    color: var(--text-primary);
}

.alert-warning {
    border-left-color: var(--warning);
    color: var(--text-primary);
}

.alert-info {
    border-left-color: var(--primary);
    color: var(--text-primary);
}

.close-btn {
    flex-shrink: 0;
    margin-left: auto;
    background: none;
    border: none;
    padding: 0;
    color: inherit;
    font-size: 1.25rem;
    line-height: 1;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity var(--transition-base);
}

.close-btn:hover {
    opacity: 1;
}

/* ============================================
   16. ACCOUNT & ADMIN
   ============================================ */
.account-container,
.admin-container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

@media (min-width: 1024px) {
    .account-container,
    .admin-container {
        grid-template-columns: 280px 1fr;
    }
}

.account-sidebar,
.admin-sidebar {
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    height: fit-content;
}

.user-info {
    text-align: center;
    padding-bottom: var(--space-5);
    margin-bottom: var(--space-5);
    border-bottom: 1px solid var(--border-tertiary);
}

.user-avatar {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-3);
    background: var(--bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-avatar i {
    font-size: 1.5rem;
    color: var(--text-secondary);
}

.user-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.user-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
}

.user-info p i {
    color: var(--text-tertiary);
}

.account-content,
.admin-content {
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
}

.account-section-header {
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-tertiary);
}

.account-section-header h2 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.account-section-header h2 i {
    color: var(--primary);
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.account-nav,
.admin-nav {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.account-nav a,
.admin-nav a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9375rem;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.account-nav a i,
.admin-nav a i {
    flex-shrink: 0;
    width: 20px;
    text-align: center;
    font-size: 1.125rem;
}

.account-nav a:hover,
.admin-nav a:hover {
    background: var(--bg-tertiary);
    color: var(--primary-light);
}

.account-nav a.active,
.admin-nav a.active {
    background: var(--primary);
    color: white;
}

.account-nav a.active:hover,
.admin-nav a.active:hover {
    background: var(--primary-dark);
    color: white;
}

.orders-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.order-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
    transition: all var(--transition-base);
}

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

.order-cancelled {
    opacity: 0.7;
    border-color: var(--danger);
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-5);
    padding-bottom: var(--space-5);
    border-bottom: 1px solid var(--border-tertiary);
}

.order-id {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.order-id strong {
    font-size: 1.0625rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.order-id strong i {
    color: var(--text-tertiary);
}

.order-date {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.order-status-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.status-pending {
    background: rgba(245, 158, 11, 0.1);
    border: 1px solid var(--warning);
    color: var(--warning);
}

.status-paid {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    color: var(--success);
}

.status-cancelled {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--danger);
    color: var(--danger);
}

.order-items {
    margin-bottom: var(--space-5);
}

.order-items ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.order-items ul li {
    display: flex;
    justify-content: space-between;
    padding: var(--space-3) 0;
    color: var(--text-secondary);
    font-size: 0.9375rem;
    border-bottom: 1px solid var(--border-tertiary);
}

.order-items ul li:last-child {
    border-bottom: none;
}

.order-items ul li i {
    color: var(--text-tertiary);
    margin-right: var(--space-2);
}

.order-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-tertiary);
}

.order-total {
    font-size: 1.125rem;
    font-weight: 600;
}

.order-total i {
    color: var(--text-tertiary);
    margin-right: var(--space-2);
}

.order-total .price {
    color: var(--accent);
}

.order-actions {
    display: flex;
    gap: var(--space-3);
}

.admin-main-container {
    max-width: 100%;
    width: 100%;
}

.hidden-row {
    display: none;
}

.show-more-container {
    text-align: center;
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-tertiary);
}

.show-more-btn {
    min-width: 200px;
}

/* ============================================
   17. ADMIN TABLES & STATS
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-5);
    margin-bottom: var(--space-8);
}

@media (min-width: 640px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    text-align: center;
}

.stat-card:hover {
    border-color: var(--border-hover);
}

.stat-card i {
    display: block;
    font-size: 2rem;
    color: var(--accent);
    margin-bottom: var(--space-3);
}

.stat-card h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.stat-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin: 0 calc(var(--space-8) * -1);
    padding: 0 var(--space-8);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    font-size: 0.9375rem;
}

.admin-table thead {
    background: var(--bg-primary);
    border-bottom: 2px solid var(--border-tertiary);
}

.admin-table th {
    padding: var(--space-4) var(--space-5);
    text-align: left;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.admin-table td {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-tertiary);
    color: var(--text-secondary);
}

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

.admin-table tbody tr:hover {
    background: var(--bg-card);
}

.action-buttons {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.action-buttons .btn {
    padding: var(--space-2) var(--space-3);
    font-size: 0.8125rem;
}

/* ============================================
   18. PAYMENT PAGE
   ============================================ */
.payment-container {
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    margin-bottom: var(--space-8);
}

.payment-header {
    text-align: center;
    margin-bottom: var(--space-6);
    padding-bottom: var(--space-5);
    border-bottom: 1px solid var(--border-tertiary);
}

.payment-header h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
}

.payment-header h1 i {
    color: var(--primary);
}

.payment-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

.payment-info-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-bottom: var(--space-6);
}

.payment-detail-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-tertiary);
    font-size: 1rem;
}

.payment-detail-row:last-child {
    border-bottom: none;
}

.payment-detail-row strong {
    color: var(--text-primary);
}

.payment-detail-row span {
    color: var(--text-secondary);
    font-weight: 600;
}

.payment-detail-row .highlight {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.125rem;
}

.qr-code-section {
    text-align: center;
    margin-bottom: var(--space-6);
    padding: var(--space-6);
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
}

.qr-code {
    display: inline-block;
    padding: var(--space-4);
    background: white;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-4);
}

.qr-code canvas {
    display: block;
}

.crypto-address {
    padding: var(--space-4) var(--space-5);
    background: var(--bg-primary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--primary);
    word-break: break-all;
    margin-bottom: var(--space-4);
}

.copy-btn {
    padding: var(--space-3) var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9375rem;
    cursor: pointer;
    transition: all var(--transition-base);
}

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

.payment-instructions {
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    margin-bottom: var(--space-6);
}

.payment-instructions h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.payment-instructions h3 i {
    color: var(--text-secondary);
}

.payment-instructions ol {
    margin: 0;
    padding-left: var(--space-6);
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.8;
}

.payment-instructions ol li {
    margin-bottom: var(--space-3);
}

.payment-warning {
    display: flex;
    gap: var(--space-4);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-left: 3px solid var(--warning);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-6);
}

.payment-warning i {
    flex-shrink: 0;
    font-size: 1.5rem;
    color: var(--warning);
    margin-top: var(--space-1);
}

.payment-warning strong {
    display: block;
    color: var(--text-primary);
    font-size: 1rem;
    margin-bottom: var(--space-2);
}

.payment-warning p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.7;
    margin: 0;
}

.payment-status {
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-md);
    padding: var(--space-6);
    text-align: center;
}

.status-spinner {
    display: inline-block;
    width: 50px;
    height: 50px;
    border: 4px solid var(--border-tertiary);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--space-4);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.payment-status p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ============================================
   19. VOUCHER INPUT
   ============================================ */
.voucher-input-wrapper {
    display: flex;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.voucher-input-wrapper input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
    color: var(--text-primary);
    font-size: 0.9375rem;
    transition: all var(--transition-base);
}

.voucher-input-wrapper input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.voucher-input-wrapper button {
    flex-shrink: 0;
    white-space: nowrap;
}

/* ============================================
   20. FOOTER
   ============================================ */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-primary);
    padding: var(--space-8) 0;
    margin-top: var(--space-16);
}

.footer p {
    font-size: 0.8125rem;
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
    text-align: center;
}

@media (min-width: 640px) {
    .footer .container {
        flex-direction: row;
        justify-content: space-between;
        text-align: left;
    }
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    margin: 0;
}

.footer-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-6);
    justify-content: center;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 600;
    transition: color var(--transition-base);
}

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

/* ============================================
   21. MOBILE NAVIGATION
   ============================================ */
@media (max-width: 1023px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--bg-secondary);
        border-top: 1px solid var(--border-primary);
        padding: var(--space-4);
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        max-height: 400px;
        opacity: 1;
    }
    
    .nav-menu a {
        padding: var(--space-3) var(--space-4);
        border-bottom: 1px solid var(--border-secondary);
    }
    
    .nav-menu a:last-child {
        border-bottom: none;
    }
    
    .nav-menu a::after {
        display: none;
    }
}

/* ============================================
   22. MOBILE OPTIMIZATIONS
   ============================================ */
@media (max-width: 767px) {
    :root {
        --space-8: 1.5rem;
        --space-10: 2rem;
        --space-12: 2.5rem;
        --space-16: 3rem;
    }

    .hero {
        padding: var(--space-6) var(--space-4);
    }

    .content-section-wrapper {
        padding: var(--space-5);
    }

    .cart-item,
    .checkout-item {
        gap: var(--space-4);
    }

    .cart-item-image img,
    .product-placeholder-small {
        width: 80px;
        height: 80px;
    }

    .voucher-input-wrapper {
        flex-direction: column;
    }

    .voucher-input-wrapper button {
        width: 100%;
    }

    .table-responsive {
        margin: 0 calc(var(--space-5) * -1);
        padding: 0 var(--space-5);
    }
}

@media (max-width: 479px) {
    .container {
        padding-left: var(--space-3);
        padding-right: var(--space-3);
    }
    
    .hero {
        padding: var(--space-6) var(--space-4);
    }
    
    .content-section-wrapper {
        padding: var(--space-5);
    }
    
    .cart-item-image img,
    .product-placeholder-small,
    .checkout-item-image img {
        width: 60px;
        height: 60px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   23. TOUCH DEVICE OPTIMIZATIONS
   ============================================ */
@media (hover: none) and (pointer: coarse) {
    .btn,
    a,
    button,
    input[type="submit"],
    input[type="button"] {
        min-height: 44px;
    }
}

/* ============================================
   24. PRINT STYLES
   ============================================ */
@media print {
    .navbar,
    .category-navbar,
    .footer,
    .btn,
    .nav-menu,
    .flash-messages,
    .admin-sidebar,
    .account-sidebar {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .container {
        max-width: 100%;
    }
    
    .product-card,
    .category-card,
    .order-card,
    .stat-card {
        break-inside: avoid;
    }
}

/* ============================================
   25. ACCESSIBILITY ENHANCEMENTS
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ============================================
   26. HIGH RESOLUTION DISPLAYS
   ============================================ */
@media (min-width: 1920px) {
    html {
        font-size: 18px;
    }
    
    .container {
        max-width: 1600px;
    }
}

@media (min-width: 2560px) {
    html {
        font-size: 20px;
    }
    
    .container {
        max-width: 1920px;
    }
}

/* ============================================
   27. UTILITY CLASSES
   ============================================ */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.text-left {
    text-align: left;
}

.mt-1 { margin-top: var(--space-4); }
.mt-2 { margin-top: var(--space-6); }
.mb-1 { margin-bottom: var(--space-4); }
.mb-2 { margin-bottom: var(--space-6); }

.hidden {
    display: none !important;
}

.visible {
    display: block !important;
}

/* End of Professional CSS */

/* ============================================
   SEARCH BAR STYLING
   ============================================ */
.search-bar-wrapper {
    background: var(--bg-primary);
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-primary);
}

.search-form {
    max-width: 500px;
    margin: 0 auto;
}

.search-input-group {
    display: flex;
    gap: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
    transition: border-color var(--transition-fast);
}

.search-input-group:focus-within {
    border-color: var(--primary);
}

.search-input {
    flex: 1;
    padding: var(--space-3) var(--space-5);
    border: none;
    font-size: 0.875rem;
    outline: none;
    background: transparent;
    color: var(--text-primary);
}

.search-input::placeholder {
    color: var(--text-tertiary);
}

.search-button {
    padding: var(--space-3) var(--space-5);
    background: var(--primary);
    color: white;
    border: none;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    font-size: 0.9375rem;
}

.search-button:hover {
    background: var(--primary-dark);
}

.search-button i {
    pointer-events: none;
}

/* Search Results Page */
.search-results-header {
    text-align: center;
    margin: var(--space-8) 0 var(--space-6) 0;
    padding: 0 var(--space-4);
}

.search-results-header h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    font-weight: 600;
}

.search-results-count {
    color: var(--text-secondary);
    font-size: 1rem;
}

.no-results {
    text-align: center;
    padding: var(--space-10) var(--space-4);
    color: var(--text-secondary);
}

.no-results i {
    color: var(--text-tertiary);
    margin-bottom: var(--space-5);
    opacity: 0.5;
}

.no-results p {
    font-size: 1.125rem;
    margin-bottom: var(--space-4);
}

.no-results-hint {
    font-size: 0.9375rem;
    color: var(--text-tertiary);
}

.no-results-hint a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.no-results-hint a:hover {
    text-decoration: underline;
}

/* ============================================
   CATEGORY PAGE STYLES
   ============================================ */
.breadcrumb-wrapper {
    margin-bottom: var(--space-6);
}

.breadcrumb-separator {
    color: var(--text-tertiary);
    margin: 0 var(--space-2);
}

.category-page-header {
    text-align: center;
    margin-bottom: var(--space-8);
}

.category-page-header h1 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.category-page-header p {
    color: var(--text-secondary);
    font-size: 1.0625rem;
    max-width: 40rem;
    margin: 0 auto;
}

/* Pagination */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-tertiary);
}

.page-info {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: var(--space-16) var(--space-6);
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-lg);
}

.empty-state i {
    font-size: 4rem;
    color: var(--text-tertiary);
    margin-bottom: var(--space-6);
    opacity: 0.5;
}

.empty-state h2 {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: var(--space-6);
    max-width: 24rem;
    margin-left: auto;
    margin-right: auto;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .search-bar-wrapper {
        padding: var(--space-3) 0;
    }

    .search-input {
        padding: var(--space-3) var(--space-4);
        font-size: 0.875rem;
    }

    .search-button {
        padding: var(--space-3) var(--space-4);
        font-size: 0.9375rem;
    }

    .search-results-header h1 {
        font-size: 1.5rem;
    }

    .search-results-count {
        font-size: 0.9375rem;
    }

    .category-page-header h1 {
        font-size: 1.75rem;
    }

    .pagination {
        flex-direction: column;
        gap: var(--space-3);
    }
}

/* ============================================
   28. BRANDING & LOGO STYLES
   ============================================ */

/* Navigation Logo */
.nav-logo-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo {
    height: 80px;
    width: auto;
    max-width: 360px;
    object-fit: contain;
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.85;
}

.nav-logo-text {
    font-family: 'Playfair Display', Georgia, serif;
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    transition: color var(--transition-fast);
}

.nav-logo-link:hover .nav-logo-text {
    color: var(--primary);
}

@media (max-width: 768px) {
    .nav-logo {
        height: 64px;
        max-width: 280px;
    }
}

/* Hero with Background Banner */
.hero-with-banner {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(10, 10, 11, 0.92) 0%,
        rgba(10, 10, 11, 0.75) 50%,
        rgba(10, 10, 11, 0.85) 100%
    );
    z-index: 0;
}

.hero-with-banner .hero-content {
    position: relative;
    z-index: 1;
}

/* Promo Banner */
.promo-banner-wrapper {
    margin-bottom: var(--space-8);
}

.promo-banner {
    display: block;
    width: 100%;
    overflow: hidden;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-tertiary);
    transition: all var(--transition-base);
}

.promo-banner:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}

.promo-banner img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform var(--transition-slow);
}

.promo-banner:hover img {
    transform: scale(1.02);
}

/* Category Banner */
.category-banner {
    width: 100%;
    margin-bottom: var(--space-6);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-tertiary);
}

.category-banner img {
    width: 100%;
    height: auto;
    display: block;
}

/* Sidebar Banner */
.sidebar-banner {
    display: block;
    width: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-tertiary);
    margin-bottom: var(--space-5);
    transition: all var(--transition-base);
}

.sidebar-banner:hover {
    border-color: var(--primary);
}

.sidebar-banner img {
    width: 100%;
    height: auto;
    display: block;
}

/* Email Template Styles (for reference) */
.email-logo {
    max-width: 200px;
    height: auto;
}

.email-header-banner {
    width: 100%;
    max-width: 600px;
    height: auto;
}

/* ============================================
   LATEST COURSES SLIDESHOW
   ============================================ */
.latest-slideshow {
    position: relative;
}

.section-header-centered {
    text-align: center;
}

.section-header-centered h2 {
    margin-bottom: var(--space-1);
}

.section-header-centered .section-divider {
    margin: 0 auto var(--space-3);
}

.slideshow-controls {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.slide-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border-tertiary);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    transition: all 0.2s;
}

.slide-btn:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(220, 38, 38, 0.08);
    box-shadow: 0 0 12px rgba(220, 38, 38, 0.15);
}

.slideshow-track-wrapper {
    overflow: hidden;
    position: relative;
}

.slideshow-track {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: nowrap !important;
    gap: 16px;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
}

.slide-card {
    flex: 0 0 200px !important;
    width: 200px !important;
    max-width: 200px !important;
    min-width: 200px;
    height: auto;
    background: var(--bg-card);
    border: 1px solid var(--border-tertiary);
    border-radius: var(--radius-xl, 12px);
    overflow: hidden;
    text-decoration: none !important;
    color: inherit;
    transition: border-color 0.2s, box-shadow 0.2s, transform 0.2s;
    display: flex !important;
    flex-direction: column !important;
}

.slide-card:hover {
    border-color: var(--accent-dark, #a47d0c);
    box-shadow: 0 4px 20px rgba(212, 160, 18, 0.12), 0 0 30px rgba(212, 160, 18, 0.06);
    transform: translateY(-3px);
}

.slide-card-img {
    width: 100%;
    aspect-ratio: 4/3;
    overflow: hidden;
    position: relative;
    background: var(--bg-secondary, #0f0f12);
}

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

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

.slide-card-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--text-tertiary);
    opacity: 0.3;
}

.slide-card-info {
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    flex: 1;
}

.slide-card-category {
    font-size: 0.625rem;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--accent, #d4a012);
    font-weight: 700;
}

.slide-card-title {
    font-size: 0.8125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.slide-card-price {
    font-size: 0.8125rem;
    font-weight: 800;
    color: var(--primary-light, #ef4444);
    margin-top: auto;
    padding-top: 4px;
    text-shadow: 0 0 15px rgba(220, 38, 38, 0.2);
}

@media (max-width: 768px) {
    .slide-card {
        flex: 0 0 160px !important;
        width: 160px !important;
        max-width: 160px !important;
        min-width: 160px;
    }

    .slide-card-img {
        aspect-ratio: 4/3;
    }

    .slide-card-info {
        padding: 8px 10px;
    }

    .slide-card-title {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    .slide-card {
        flex: 0 0 140px !important;
        width: 140px !important;
        max-width: 140px !important;
        min-width: 140px;
    }

    .slide-card-img {
        aspect-ratio: 4/3;
    }
}