/* ========================================
   SHOPTDAN MODERN THEME v2.0
   Inspired by TitanRobux.net
   ======================================== */

/* CSS Variables - Dark Theme (Default) */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #ec4899;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-primary: #0f0f23;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-hover: #1e3a5f;
    
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --border-color: #334155;
    --shadow-color: rgba(0, 0, 0, 0.3);
    
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #ec4899 100%);
    --gradient-secondary: linear-gradient(135deg, #f59e0b 0%, #ef4444 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #06b6d4 100%);
    
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-hover: #f1f5f9;
    
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Inter', 'Roboto', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */
.modern-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 15, 35, 0.95);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    transition: var(--transition);
}

.modern-header.scrolled {
    background: rgba(15, 15, 35, 0.98);
    box-shadow: 0 4px 30px var(--shadow-color);
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo img {
    height: 45px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Search Bar */
.search-container {
    flex: 1;
    max-width: 500px;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 50px;
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.search-box i {
    position: absolute;
    left: 1rem;
    color: var(--text-muted);
    font-size: 1.1rem;
}

.search-box button {
    position: absolute;
    right: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.search-box button:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.25rem;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-wallet {
    background: var(--gradient-secondary);
    color: white;
}

.btn-wallet:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(245, 158, 11, 0.4);
}

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

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

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

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

/* User Profile */
.user-profile {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    background: var(--bg-secondary);
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
}

.user-profile:hover {
    background: var(--bg-hover);
}

.user-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 2px solid var(--primary-color);
}

.user-info {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.user-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.user-balance {
    font-size: 0.8rem;
    color: var(--success-color);
    font-weight: 700;
}

/* Theme Toggle */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    color: var(--text-primary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

/* ========================================
   LIVE STATS BAR
   ======================================== */
.stats-bar {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 0;
    margin-top: 70px;
}

.stats-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 1rem;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.stat-icon {
    font-size: 1.5rem;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--primary-color);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero-section {
    padding: 2rem 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.hero-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 1.5rem;
}

.hero-banner {
    position: relative;
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    height: 350px;
}

.hero-banner img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-banner .swiper-pagination-bullet {
    background: white;
    opacity: 0.5;
}

.hero-banner .swiper-pagination-bullet-active {
    background: var(--primary-color);
    opacity: 1;
}

.hero-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Top Recharge Widget */
.top-recharge-widget {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
}

.widget-header {
    background: var(--gradient-primary);
    padding: 1rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.widget-header h3 {
    font-size: 1rem;
    font-weight: 700;
    color: white;
}

.widget-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
}

.widget-tab {
    flex: 1;
    padding: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}

.widget-tab.active {
    color: var(--primary-color);
    background: var(--bg-hover);
    border-bottom: 2px solid var(--primary-color);
}

.widget-content {
    padding: 1rem;
}

/* Recharge Form */
.recharge-form .form-group {
    margin-bottom: 0.75rem;
}

.recharge-form select,
.recharge-form input {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.btn-recharge {
    width: 100%;
    padding: 0.875rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-recharge:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.4);
}

/* Top Users List */
.top-users-list {
    max-height: 200px;
    overflow-y: auto;
}

.top-user-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

.top-user-item:hover {
    background: var(--bg-hover);
}

.top-user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.top-user-rank {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
}

.top-user-rank.gold { background: linear-gradient(135deg, #fbbf24, #f59e0b); }
.top-user-rank.silver { background: linear-gradient(135deg, #94a3b8, #64748b); }
.top-user-rank.bronze { background: linear-gradient(135deg, #f97316, #ea580c); }

.top-user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
}

.top-user-name {
    font-weight: 600;
    font-size: 0.9rem;
}

.top-user-amount {
    font-weight: 700;
    color: var(--success-color);
    font-size: 0.9rem;
}

/* ========================================
   CATEGORY QUICK ACCESS - UPGRADED
   ======================================== */
.category-section {
    padding: 2rem 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1rem;
}

.category-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1.25rem 0.75rem;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

/* Rainbow border on hover */
.category-item::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #6366f1, #ec4899, #f59e0b, #10b981, #6366f1);
    background-size: 400% 400%;
    border-radius: var(--border-radius-lg);
    z-index: -1;
    opacity: 0;
    transition: opacity 0.4s ease;
    animation: gradient-rotate 3s ease infinite;
}

@keyframes gradient-rotate {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.category-item:hover::before {
    opacity: 1;
}

.category-item:hover {
    transform: translateY(-8px) scale(1.05);
    box-shadow: 0 15px 35px rgba(99, 102, 241, 0.3);
}

.category-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    margin-bottom: 0.75rem;
    object-fit: cover;
    transition: all 0.4s ease;
}

.category-item:hover .category-icon {
    transform: scale(1.15) rotate(5deg);
    filter: drop-shadow(0 5px 15px rgba(99, 102, 241, 0.4));
}

.category-name {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-primary);
    text-align: center;
    transition: color 0.3s ease;
}

.category-item:hover .category-name {
    color: var(--primary-color);
}

/* ========================================
   ANNOUNCEMENT BAR
   ======================================== */
.announcement-bar {
    max-width: 1400px;
    margin: 0 auto 2rem;
    padding: 0 1.5rem;
}

.announcement-content {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--danger-color);
}

.announcement-icon {
    font-size: 1.5rem;
    animation: bell-ring 1s ease infinite;
}

@keyframes bell-ring {
    0%, 100% { transform: rotate(0); }
    25% { transform: rotate(15deg); }
    75% { transform: rotate(-15deg); }
}

.announcement-text {
    flex: 1;
    font-weight: 500;
    color: var(--text-secondary);
}

.announcement-text strong {
    color: var(--danger-color);
}

/* ========================================
   SECTION HEADER - UPGRADED
   ======================================== */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    position: relative;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 10px;
}

.section-title i {
    color: var(--primary-color);
    font-size: 1.5rem;
    animation: icon-float 3s ease-in-out infinite;
}

@keyframes icon-float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.view-all-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: white;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.view-all-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.view-all-btn:hover::before {
    left: 100%;
}

.view-all-btn:hover {
    background: var(--primary-hover);
    transform: translateX(5px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.view-all-btn i {
    transition: transform 0.3s ease;
}

.view-all-btn:hover i {
    transform: translateX(5px);
}

/* ========================================
   PRODUCT GRID - UPGRADED v2.0
   ======================================== */
.products-section {
    padding: 0 1.5rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1.25rem;
}

.product-card {
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-decoration: none;
    display: block;
    position: relative;
}

/* Glow effect on hover */
.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: var(--border-radius-lg);
    padding: 2px;
    background: linear-gradient(135deg, #6366f1, #ec4899, #f59e0b);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.product-card:hover::before {
    opacity: 1;
}

.product-card:hover {
    transform: translateY(-12px) scale(1.02);
    box-shadow: 
        0 25px 50px rgba(99, 102, 241, 0.25),
        0 0 30px rgba(236, 72, 153, 0.15);
}

/* Shine effect */
.product-card::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(
        to bottom right,
        rgba(255, 255, 255, 0) 0%,
        rgba(255, 255, 255, 0) 40%,
        rgba(255, 255, 255, 0.1) 50%,
        rgba(255, 255, 255, 0) 60%,
        rgba(255, 255, 255, 0) 100%
    );
    transform: rotate(45deg) translateX(-100%);
    transition: transform 0.6s ease;
    pointer-events: none;
}

.product-card:hover::after {
    transform: rotate(45deg) translateX(100%);
}

.product-image {
    position: relative;
    width: 100%;
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--bg-secondary);
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    filter: brightness(0.95);
}

.product-card:hover .product-image img {
    transform: scale(1.15) rotate(2deg);
    filter: brightness(1.1);
}

/* ===== SHINE SWEEP ANIMATION - MÀU TÍM ===== */
@keyframes shine-sweep-continuous {
    0% { left: -100%; }
    100% { left: 200%; }
}

@keyframes shine-sweep-fast {
    0% { left: -100%; }
    100% { left: 200%; }
}

/* Light sweep tự động liên tục */
.product-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(139, 92, 246, 0.3),
        rgba(99, 102, 241, 0.6),
        rgba(236, 72, 153, 0.6),
        rgba(139, 92, 246, 0.3),
        transparent
    );
    transform: skewX(-15deg);
    z-index: 100;
    pointer-events: none;
    animation: shine-sweep-continuous 4s linear infinite;
}

/* Stagger animation */
.product-card:nth-child(1) .product-image::after { animation-delay: 0s; }
.product-card:nth-child(2) .product-image::after { animation-delay: 0.5s; }
.product-card:nth-child(3) .product-image::after { animation-delay: 1s; }
.product-card:nth-child(4) .product-image::after { animation-delay: 1.5s; }
.product-card:nth-child(5) .product-image::after { animation-delay: 2s; }
.product-card:nth-child(6) .product-image::after { animation-delay: 2.5s; }
.product-card:nth-child(7) .product-image::after { animation-delay: 3s; }
.product-card:nth-child(8) .product-image::after { animation-delay: 3.5s; }

/* Hover - shine nhanh + sáng hơn */
.product-card:hover .product-image::after {
    animation: shine-sweep-fast 0.5s ease-out forwards;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(139, 92, 246, 0.5),
        rgba(99, 102, 241, 0.8),
        rgba(236, 72, 153, 0.8),
        rgba(139, 92, 246, 0.5),
        transparent
    );
}

.product-badge {
    position: absolute;
    top: 0.75rem;
    left: 0.75rem;
    padding: 0.35rem 0.75rem;
    background: var(--gradient-secondary);
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 700;
    color: white;
    text-transform: uppercase;
    z-index: 2;
    animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.product-stock {
    position: absolute;
    bottom: 0.75rem;
    right: 0.75rem;
    padding: 0.35rem 0.75rem;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: white;
    z-index: 2;
    transition: all 0.3s ease;
}

.product-card:hover .product-stock {
    background: var(--primary-color);
    transform: translateY(-3px);
}

.product-info {
    padding: 1rem;
    position: relative;
}

.product-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
    transition: color 0.3s ease;
}

.product-card:hover .product-title {
    color: var(--primary-color);
}

.product-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.75rem;
}

.product-price {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--danger-color);
    position: relative;
}

/* Price animation on hover */
.product-card:hover .product-price {
    animation: price-bounce 0.5s ease;
}

@keyframes price-bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.product-sold {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.product-sold::before {
    content: '🔥';
    font-size: 0.9rem;
}

.product-action {
    margin-top: 1rem;
}

.btn-buy {
    width: 100%;
    padding: 0.75rem;
    background: var(--gradient-primary);
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
}

.btn-buy::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s ease;
}

.product-card:hover .btn-buy::before {
    left: 100%;
}

.btn-buy:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(99, 102, 241, 0.5);
}

/* Quick view icon on hover */
.product-image .quick-view {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    font-size: 1.5rem;
    transition: all 0.3s ease;
    z-index: 3;
}

.product-card:hover .quick-view {
    transform: translate(-50%, -50%) scale(1);
}

/* ========================================
   FOOTER
   ======================================== */
.modern-footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 3rem 1.5rem 1.5rem;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
}

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

.footer-brand {
    max-width: 350px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.footer-logo img {
    height: 50px;
}

.footer-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 0.75rem;
}

.social-link {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 1.2rem;
    transition: var(--transition);
    text-decoration: none;
}

.social-link:hover {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
    transform: translateY(-3px);
}

.footer-column h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-links a:hover {
    color: var(--primary-color);
    transform: translateX(5px);
}

.payment-methods {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.payment-method {
    padding: 0.5rem 0.75rem;
    background: var(--bg-card);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.payment-method img {
    height: 24px;
}

.footer-bottom {
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-badges {
    display: flex;
    gap: 1rem;
}

/* ========================================
   FLOATING BUTTONS
   ======================================== */
.floating-buttons {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 999;
}

.floating-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px var(--shadow-color);
}

.floating-btn:hover {
    transform: scale(1.1);
}

.btn-messenger {
    background: #0084ff;
    color: white;
}

.btn-zalo {
    background: #0068ff;
    color: white;
}

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

.btn-scroll-top {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-gift {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: white;
    animation: pulse-gift 2s infinite;
}

@keyframes pulse-gift {
    0%, 100% { box-shadow: 0 0 0 0 rgba(255, 107, 53, 0.7); }
    50% { box-shadow: 0 0 0 10px rgba(255, 107, 53, 0); }
}

/* ========================================
   MODAL / POPUP
   ======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    border: 1px solid var(--border-color);
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: var(--transition);
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 700;
}

.modal-close {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close:hover {
    background: var(--danger-color);
    color: white;
}

.modal-body {
    padding: 1.5rem;
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */
@media (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .category-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .search-container {
        display: none;
    }
}

@media (max-width: 768px) {
    .header-container {
        padding: 0 1rem;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    
    .category-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stats-container {
        gap: 1rem;
    }
    
    .stat-item {
        padding: 0.5rem;
    }
    
    .stat-value {
        font-size: 1rem;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .floating-buttons {
        bottom: 5rem;
        right: 1rem;
    }
}

@media (max-width: 576px) {
    .hero-banner {
        height: 200px;
    }
    
    .product-image {
        aspect-ratio: 16/10;
        height: auto;
    }
    
    .header-actions .btn-text {
        display: none;
    }
}

/* ========================================
   MOBILE BOTTOM NAVIGATION
   ======================================== */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 0.5rem;
    z-index: 1000;
}

@media (max-width: 768px) {
    .mobile-nav {
        display: flex;
        justify-content: space-around;
    }
    
    body {
        padding-bottom: 70px;
    }
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 600;
    transition: var(--transition);
}

.mobile-nav-item i {
    font-size: 1.3rem;
}

.mobile-nav-item.active,
.mobile-nav-item:hover {
    color: var(--primary-color);
}

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fadeInUp {
    animation: fadeInUp 0.6s ease forwards;
}

.animate-pulse {
    animation: pulse 2s ease infinite;
}

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--bg-hover) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s infinite;
    border-radius: var(--border-radius);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ========================================
   SPECIAL EFFECTS - NEW
   ======================================== */

/* Glassmorphism card */
.glass-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Neon glow text */
.neon-text {
    text-shadow: 
        0 0 5px var(--primary-color),
        0 0 10px var(--primary-color),
        0 0 20px var(--primary-color);
}

/* Floating animation for elements */
.float-animation {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Particle effect background (for hero) */
.particles-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    pointer-events: none;
}

.particles-bg::before,
.particles-bg::after {
    content: '';
    position: absolute;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: particle-move 15s ease infinite;
}

.particles-bg::before {
    background: var(--primary-color);
    top: -150px;
    left: -150px;
}

.particles-bg::after {
    background: var(--secondary-color);
    bottom: -150px;
    right: -150px;
    animation-delay: -7s;
}

@keyframes particle-move {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(50px, 50px) rotate(90deg); }
    50% { transform: translate(0, 100px) rotate(180deg); }
    75% { transform: translate(-50px, 50px) rotate(270deg); }
}

/* Gradient border animation */
.gradient-border {
    position: relative;
}

.gradient-border::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, #6366f1, #ec4899, #f59e0b, #10b981);
    background-size: 300% 300%;
    border-radius: inherit;
    z-index: -1;
    animation: gradient-shift 4s ease infinite;
}

@keyframes gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Trust badges styling */
.trust-badges {
    display: flex;
    justify-content: center;
    gap: 2rem;
    padding: 2rem 0;
    flex-wrap: wrap;
}

.trust-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.trust-badge:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.trust-badge-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
}

.trust-badge-text h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.trust-badge-text p {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Countdown/Flash sale badge */
.flash-sale-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #ef4444, #f59e0b);
    border-radius: 50px;
    color: white;
    font-weight: 700;
    font-size: 0.85rem;
    animation: flash-pulse 1.5s ease infinite;
}

@keyframes flash-pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Rating stars */
.rating-stars {
    display: flex;
    gap: 0.15rem;
    color: #fbbf24;
}

.rating-stars i {
    font-size: 0.9rem;
}

/* Stock indicator */
.stock-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.stock-indicator.in-stock {
    color: var(--success-color);
}

.stock-indicator.low-stock {
    color: var(--warning-color);
}

.stock-indicator.out-stock {
    color: var(--danger-color);
}

.stock-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    animation: stock-pulse 1.5s ease infinite;
}

@keyframes stock-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Tooltip */
[data-tooltip] {
    position: relative;
    cursor: help;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-5px);
    padding: 0.5rem 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 0.8rem;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 100;
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Scroll reveal animation */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

.reveal.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* Loading spinner */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Gift Icon Image Style */
.gift-icon-img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    margin-right: 8px;
    vertical-align: middle;
    filter: drop-shadow(0 0 8px rgba(255, 165, 0, 0.6));
    animation: giftPulse 2s ease-in-out infinite;
}

@keyframes giftPulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 0 8px rgba(255, 165, 0, 0.6));
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 0 15px rgba(255, 100, 0, 0.9));
    }
}

.gift-item {
    background: linear-gradient(135deg, rgba(255, 165, 0, 0.1), rgba(255, 69, 0, 0.1)) !important;
    border: 1px solid rgba(255, 165, 0, 0.3) !important;
    font-weight: 600 !important;
    color: #ffa500 !important;
}

.gift-item:hover {
    background: linear-gradient(135deg, rgba(255, 165, 0, 0.2), rgba(255, 69, 0, 0.2)) !important;
    transform: scale(1.02);
}