:root {
    --primary: #2c2c2c;
    --primary-dark: #1a1a1a;
    --secondary: #4a4a4a;
    --accent: #ff6b35;
    --accent-dark: #e55a2b;
    --gradient-1: linear-gradient(135deg, #2c2c2c 0%, #4a4a4a 100%);
    --gradient-2: linear-gradient(135deg, #ff6b35 0%, #e55a2b 100%);
    --gradient-3: linear-gradient(135deg, #333 0%, #666 100%);
    --dark: #1a1a1a;
    --light: #f5f5f5;
    --text-dark: #2c2c2c;
    --text-light: #ffffff;
    --border-light: rgba(44, 44, 44, 0.1);
    --shadow-soft: 0 8px 25px rgba(0, 0, 0, 0.15);
    --shadow-medium: 0 15px 40px rgba(0, 0, 0, 0.2);
    --shadow-strong: 0 25px 60px rgba(0, 0, 0, 0.25);
    --industrial-orange: #ff6b35;
    --metal-gray: #6c6c6c;
    --rust-red: #8b4513;
}

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

body {
    font-family: 'Oswald', sans-serif;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    font-weight: 400;
    position: relative;
}

/* Industrial texture overlay */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(44, 44, 44, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 107, 53, 0.03) 0%, transparent 50%),
        linear-gradient(90deg, transparent 98%, rgba(44, 44, 44, 0.03) 100%);
    pointer-events: none;
    z-index: -1;
}

/* Smooth scroll */
html {
    scroll-behavior: smooth;
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--gradient-1);
    border-radius: 10px;
}

/* Loading Animation */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Navbar */
.navbar {
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.95), rgba(44, 44, 44, 0.9));
    backdrop-filter: blur(15px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
    border-bottom: 3px solid var(--industrial-orange);
}

.navbar-brand {
    font-family: 'Bebas Neue', sans-serif;
    font-weight: 400;
    font-size: 2.8rem;
    color: var(--industrial-orange) !important;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    letter-spacing: 3px;
    transition: all 0.3s ease;
    position: relative;
    text-transform: uppercase;
}

.navbar-brand::before {
    content: '▼';
    color: var(--metal-gray);
    margin-right: 15px;
    font-size: 1.5rem;
    transform: rotate(45deg);
    display: inline-block;
}

.navbar-brand::after {
    content: '▼';
    color: var(--metal-gray);
    margin-left: 15px;
    font-size: 1.5rem;
    transform: rotate(-45deg);
    display: inline-block;
}

.navbar-brand:hover {
    transform: scale(1.05);
    color: var(--accent-dark) !important;
}

.nav-link {
    font-family: 'Oswald', sans-serif;
    color: var(--text-light) !important;
    font-weight: 500;
    font-size: 1.2rem;
    padding: 12px 24px !important;
    border-radius: 0;
    transition: all 0.3s ease;
    position: relative;
    margin: 0 5px;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid transparent;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: var(--industrial-orange);
    transition: width 0.3s ease;
}

.nav-link:hover::before {
    width: 100%;
}

.nav-link:hover {
    color: var(--industrial-orange) !important;
    transform: translateY(-2px);
    border-color: var(--industrial-orange);
}

/* Hero Section */
.hero-section {
    position: relative;
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-light);
    padding: 140px 0;
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.8), rgba(44, 44, 44, 0.6));
    z-index: 1;
}

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

.hero-section h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 5.5rem;
    font-weight: 400;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.7);
    margin-bottom: 30px;
    letter-spacing: 5px;
    line-height: 1;
    color: var(--industrial-orange);
    position: relative;
    text-transform: uppercase;
}

.hero-section h1::before {
    content: '◢◤';
    display: block;
    font-size: 2.5rem;
    color: var(--metal-gray);
    margin-bottom: 20px;
    letter-spacing: 10px;
}

.hero-section h1::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--industrial-orange), transparent);
}

.hero-section p {
    font-family: 'Oswald', sans-serif;
    font-size: 1.6rem;
    max-width: 700px;
    margin: 0 auto 50px;
    font-weight: 400;
    opacity: 0.95;
    line-height: 1.6;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.hero-section .btn {
    font-family: 'Russo One', sans-serif;
    background: var(--gradient-2);
    border: 3px solid var(--industrial-orange);
    padding: 20px 50px;
    font-weight: 400;
    border-radius: 0;
    font-size: 1.3rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    box-shadow: var(--shadow-medium);
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.hero-section .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 0.7s;
}

.hero-section .btn:hover::before {
    left: 100%;
}

.hero-section .btn:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: var(--shadow-strong);
    background: linear-gradient(135deg, var(--accent-dark) 0%, var(--industrial-orange) 100%);
}

/* Filter Section */
.filter-section {
    background: linear-gradient(135deg, rgba(245, 245, 245, 0.95), rgba(232, 232, 232, 0.9));
    backdrop-filter: blur(20px);
    padding: 60px;
    border-radius: 0;
    box-shadow: 
        var(--shadow-medium),
        inset 0 1px 0 rgba(255, 255, 255, 0.6);
    margin: -90px auto 80px;
    max-width: 95%;
    position: relative;
    z-index: 3;
    border: 4px solid var(--primary);
    border-top: 6px solid var(--industrial-orange);
    border-bottom: 6px solid var(--industrial-orange);
}

.filter-section h3 {
    font-family: 'Anton', sans-serif;
    font-size: 3rem;
    font-weight: 400;
    margin-bottom: 45px;
    color: var(--primary);
    text-align: center;
    position: relative;
    text-shadow: 2px 2px 4px rgba(44, 44, 44, 0.2);
    text-transform: uppercase;
    letter-spacing: 3px;
}

.filter-section h3::before {
    content: '◀';
    color: var(--industrial-orange);
    margin-right: 25px;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.filter-section h3::after {
    content: '▶';
    color: var(--industrial-orange);
    margin-left: 25px;
    font-size: 2.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

.search-input {
    border: 3px solid var(--primary);
    border-radius: 0;
    padding: 20px 28px;
    font-size: 1.2rem;
    font-family: 'Oswald', sans-serif;
    transition: all 0.4s ease;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: inset 0 2px 4px rgba(44, 44, 44, 0.1);
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.search-input:focus {
    border-color: var(--industrial-orange);
    box-shadow: 
        0 0 0 4px rgba(255, 107, 53, 0.15),
        inset 0 2px 4px rgba(44, 44, 44, 0.1);
    outline: none;
    transform: translateY(-2px);
}

.search-btn {
    background: var(--gradient-1);
    border: 3px solid var(--industrial-orange);
    border-radius: 0;
    padding: 20px 40px;
    color: white;
    font-weight: 600;
    font-family: 'Russo One', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.4s ease;
    box-shadow: var(--shadow-soft);
}

.search-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    background: var(--gradient-2);
    border-color: var(--accent-dark);
}

.category-filter {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.category-filter .btn {
    border: 3px solid var(--primary);
    border-radius: 0;
    padding: 18px 35px;
    font-weight: 600;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.4s ease;
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-soft);
    font-size: 1.1rem;
}

.category-filter .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-1);
    transform: translateX(-100%);
    transition: transform 0.4s ease;
    z-index: -1;
}

.category-filter .btn:hover::before,
.category-filter .btn.active::before {
    transform: translateX(0);
}

.category-filter .btn:hover,
.category-filter .btn.active {
    color: white;
    border-color: var(--industrial-orange);
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
}

.price-filter, .status-filter {
    border: 3px solid var(--primary);
    border-radius: 0;
    padding: 20px 24px;
    font-family: 'Oswald', sans-serif;
    font-size: 1.2rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.95);
    transition: all 0.4s ease;
    box-shadow: inset 0 2px 4px rgba(44, 44, 44, 0.1);
    text-transform: uppercase;
}

.price-filter:focus, .status-filter:focus {
    border-color: var(--industrial-orange);
    box-shadow: 
        0 0 0 4px rgba(255, 107, 53, 0.15),
        inset 0 2px 4px rgba(44, 44, 44, 0.1);
    outline: none;
    transform: translateY(-2px);
}

/* Product Cards */
.bike-card {
    border: none;
    border-radius: 0;
    overflow: hidden;
    transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background: rgba(255, 255, 255, 0.98);
    position: relative;
    box-shadow: 
        var(--shadow-soft),
        0 0 0 1px rgba(44, 44, 44, 0.1);
    border: 4px solid var(--primary);
}

.bike-card::before {
    content: '';
    position: absolute;
    top: -4px;
    left: -4px;
    right: -4px;
    bottom: -4px;
    background: linear-gradient(135deg, var(--industrial-orange), var(--accent-dark), var(--primary));
    z-index: -1;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.bike-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--industrial-orange), var(--accent-dark));
    opacity: 0;
    transition: opacity 0.4s ease;
    z-index: 1;
    pointer-events: none;
}

.bike-card:hover {
    transform: translateY(-15px) scale(1.03);
    box-shadow: 
        var(--shadow-strong),
        0 0 40px rgba(44, 44, 44, 0.3);
}

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

.bike-card:hover::after {
    opacity: 0.08;
}

.bike-card img {
    height: 320px;
    object-fit: cover;
    width: 100%;
    transition: all 0.5s ease;
    filter: grayscale(20%) contrast(1.1);
}

.bike-card:hover img {
    transform: scale(1.1);
    filter: grayscale(0%) contrast(1.2);
}

.bike-card .status-badge {
    position: absolute;
    top: 25px;
    right: 25px;
    z-index: 10;
    font-size: 1rem;
    font-weight: 700;
    font-family: 'Oswald', sans-serif;
    padding: 12px 24px;
    border-radius: 0;
    color: white;
    backdrop-filter: blur(15px);
    transition: all 0.4s ease;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.bike-card .status-badge.bg-success {
    background: linear-gradient(135deg, #228B22 0%, #006400 100%);
    box-shadow: 
        0 8px 25px rgba(34, 139, 34, 0.4),
        0 0 0 1px rgba(34, 139, 34, 0.2);
}

.bike-card .status-badge.bg-danger {
    background: linear-gradient(135deg, #8B0000 0%, #DC143C 100%);
    box-shadow: 
        0 8px 25px rgba(139, 0, 0, 0.4),
        0 0 0 1px rgba(139, 0, 0, 0.2);
}

.bike-card .status-badge:hover {
    transform: scale(1.1) rotate(2deg);
}

.bike-card .card-body {
    padding: 40px;
    position: relative;
    z-index: 2;
}

.bike-card .card-title {
    font-family: 'Anton', sans-serif;
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--text-dark);
    margin-bottom: 20px;
    line-height: 1.2;
    text-shadow: 1px 1px 2px rgba(44, 44, 44, 0.1);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.bike-card .card-text {
    color: var(--industrial-orange);
    font-weight: 700;
    font-size: 1.5rem;
    font-family: 'Russo One', sans-serif;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(255, 107, 53, 0.1);
    letter-spacing: 1px;
}

.bike-card .btn {
    background: var(--gradient-1);
    border: 3px solid var(--industrial-orange);
    border-radius: 0;
    padding: 18px 35px;
    color: white;
    font-weight: 700;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.4s ease;
    width: 100%;
    box-shadow: var(--shadow-soft);
    position: relative;
    overflow: hidden;
}

.bike-card .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 0.7s;
}

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

.bike-card .btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-medium);
    background: var(--gradient-2);
    border-color: var(--accent-dark);
}

.bike-card .category-icon {
    position: absolute;
    top: 25px;
    left: 25px;
    font-size: 2rem;
    color: var(--industrial-orange);
    background: linear-gradient(135deg, var(--dark), var(--primary));
    padding: 18px;
    border-radius: 50%;
    box-shadow: 
        var(--shadow-soft),
        0 0 0 3px var(--industrial-orange);
    transition: all 0.4s ease;
    z-index: 3;
}

.bike-card:hover .category-icon {
    transform: scale(1.15) rotate(20deg);
    background: linear-gradient(135deg, var(--industrial-orange), var(--accent-dark));
    color: var(--dark);
    box-shadow: 
        var(--shadow-medium),
        0 0 0 3px var(--accent-dark);
}

/* Pagination */
.pagination-nav {
    margin-top: 50px;
}

.pagination .page-link {
    border: 3px solid var(--primary);
    border-radius: 0;
    margin: 0 4px;
    padding: 15px 25px;
    font-weight: 700;
    font-family: 'Oswald', sans-serif;
    color: var(--text-dark);
    background: rgba(255, 255, 255, 0.9);
    box-shadow: var(--shadow-soft);
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.pagination .page-item.active .page-link {
    background: var(--gradient-1);
    color: white;
    border-color: var(--industrial-orange);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

.pagination .page-link:hover {
    background: var(--gradient-1);
    color: white;
    border-color: var(--industrial-orange);
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

/* Activity Section */
.activity-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    position: relative;
}

.activity-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 25% 25%, rgba(44, 44, 44, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 75% 75%, rgba(255, 107, 53, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.activity-section h2 {
    font-family: 'Anton', sans-serif;
    font-size: 3.2rem;
    font-weight: 400;
    text-align: center;
    margin-bottom: 60px;
    color: var(--primary);
    position: relative;
    text-transform: uppercase;
    letter-spacing: 3px;
}

.activity-section h2::before {
    content: '◢◤';
    display: block;
    font-size: 2.5rem;
    color: var(--industrial-orange);
    margin-bottom: 20px;
    letter-spacing: 10px;
}

.activity-section h2::after {
    content: '';
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 250px;
    height: 4px;
    background: linear-gradient(90deg, transparent, var(--industrial-orange), transparent);
}

.image-gallery .gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: 0;
    box-shadow: var(--shadow-soft);
    transition: all 0.4s ease;
    background: white;
    border: 3px solid var(--primary);
}

.image-gallery .gallery-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-medium);
    border-color: var(--industrial-orange);
}

.image-gallery .gallery-item img {
    height: 280px;
    object-fit: cover;
    width: 100%;
    transition: transform 0.4s ease;
    filter: grayscale(20%) contrast(1.1);
}

.image-gallery .gallery-item:hover img {
    transform: scale(1.1);
    filter: grayscale(0%) contrast(1.2);
}

.image-gallery .gallery-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(26, 26, 26, 0.9));
    padding: 30px 20px 20px;
    color: var(--industrial-orange);
    font-size: 1.2rem;
    font-weight: 600;
    font-family: 'Oswald', sans-serif;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.swiper {
    position: relative;
    padding: 0 60px;
}

.swiper-button-prev,
.swiper-button-next {
    color: white;
    background: var(--gradient-1);
    width: 60px;
    height: 60px;
    border-radius: 0;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-soft);
    border: 3px solid var(--industrial-orange);
}

.swiper-button-prev:hover,
.swiper-button-next:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-medium);
    background: var(--gradient-2);
}

.swiper-button-prev::after,
.swiper-button-next::after {
    font-size: 20px;
    font-weight: 700;
}

/* Contact Bar */
.contact-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, rgba(26, 26, 26, 0.95), rgba(44, 44, 44, 0.9));
    backdrop-filter: blur(15px);
    padding: 20px 0;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.3);
    z-index: 1000;
    border-top: 3px solid var(--industrial-orange);
}

.contact-bar .btn {
    font-size: 1rem;
    font-family: 'Oswald', sans-serif;
    border-radius: 0;
    margin: 0 8px;
    padding: 15px 28px;
    color: white;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.contact-bar .btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-soft);
}

.contact-bar .btn i {
    margin-right: 10px;
    font-size: 1.1rem;
}

.contact-bar .btn-success {
    background: linear-gradient(135deg, #228B22 0%, #006400 100%);
    border-color: var(--industrial-orange);
}

.contact-bar .btn-primary {
    background: var(--gradient-1);
    border-color: var(--industrial-orange);
}

.contact-bar .btn-warning {
    background: linear-gradient(135deg, #DAA520 0%, #B8860B 100%);
    border-color: var(--accent-dark);
}

.contact-bar .btn-info {
    background: linear-gradient(135deg, #4682B4 0%, #1E90FF 100%);
    border-color: var(--metal-gray);
}

/* Footer */
footer {
    background: linear-gradient(135deg, var(--dark), var(--primary));
    padding: 60px 0;
    margin-bottom: 80px;
    color: var(--text-light);
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, var(--industrial-orange), var(--accent-dark), var(--metal-gray));
}

footer p {
    margin: 0;
    font-weight: 400;
    font-family: 'Oswald', sans-serif;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Floating Zalo Button */
.zalo-chat-widget {
    position: fixed;
    bottom: 100px;
    top: 80%;
    right: 20px;
    z-index: 1000;
}

.zalo-chat-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-1);
    color: white;
    font-weight: 600;
    font-size: 1rem;
    font-family: 'Oswald', sans-serif;
    padding: 15px 20px;
    border-radius: 0;
    text-decoration: none;
    box-shadow: var(--shadow-medium);
    transition: all 0.3s ease;
    border: 3px solid var(--industrial-orange);
    text-transform: uppercase;
    letter-spacing: 1px;
    white-space: nowrap;
}

.zalo-chat-btn i {
    font-size: 1.2rem;
    margin-right: 8px;
}

.zalo-chat-btn:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: var(--shadow-strong);
    color: white;
    background: var(--gradient-2);
}

/* Mobile responsive cho Zalo button */
@media (max-width: 768px) {
    .zalo-chat-widget {
        bottom: 80px;
        right: 15px;
    }
    
    .zalo-chat-btn {
        font-size: 0.9rem;
        padding: 12px 16px;
        letter-spacing: 0.5px;
    }
    
    .zalo-chat-btn i {
        font-size: 1.1rem;
        margin-right: 6px;
    }
}

@media (max-width: 576px) {
    .zalo-chat-widget {
        bottom: 75px;
        right: 10px;
    }
    
    .zalo-chat-btn {
        font-size: 0.8rem;
        padding: 10px 12px;
        letter-spacing: 0px;
    }
    
    .zalo-chat-btn i {
        font-size: 1rem;
        margin-right: 4px;
    }
}

/* Modal Enhancements */
.modal-content {
    border-radius: 0;
    border: 4px solid var(--industrial-orange);
    box-shadow: var(--shadow-strong);
    overflow: hidden;
}

.modal-header {
    background: var(--gradient-1);
    color: white;
    border: none;
    padding: 25px 35px;
}

.modal-title {
    font-family: 'Anton', sans-serif;
    font-weight: 400;
    font-size: 1.6rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.modal-body {
    padding: 35px;
    font-family: 'Oswald', sans-serif;
}

.btn-close {
    filter: invert(1);
    opacity: 0.8;
}

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

.thumbnail-img {
    cursor: pointer;
    opacity: 0.7;
    border-radius: 0;
    transition: all 0.3s ease;
    border: 3px solid transparent;
}

.thumbnail-img:hover,
.thumbnail-img.active {
    opacity: 1;
    border-color: var(--industrial-orange);
    transform: scale(1.05);
}

.bike-description {
    white-space: pre-wrap;
    font-size: 1.1rem;
    color: var(--text-dark);
    line-height: 1.7;
    font-family: 'Oswald', sans-serif;
    font-weight: 400;
}

.contact-buttons {
    display: flex;
    gap: 15px;
    margin-top: 25px;
}

.contact-buttons .btn {
    flex: 1;
    border-radius: 0;
    padding: 15px 25px;
    font-weight: 600;
    font-family: 'Oswald', sans-serif;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 2px;
    border: 2px solid var(--primary);
}

.contact-buttons .btn:hover {
    transform: translateY(-2px);
}

/* Responsive Design */
@media (max-width: 992px) {
    .hero-section h1 {
        font-size: 4.5rem;
    }

    .hero-section p {
        font-size: 1.4rem;
    }

    .filter-section {
        padding: 45px 35px;
        margin: -70px 15px 60px;
    }

    .filter-section h3 {
        font-size: 2.5rem;
    }

    .bike-card img {
        height: 280px;
    }

    .contact-bar .btn {
        font-size: 0.95rem;
        padding: 12px 20px;
    }

    .swiper {
        padding: 0 50px;
    }

    .activity-section h2 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    .navbar-brand {
        font-size: 2.2rem;
    }

    .nav-link {
        padding: 10px 18px !important;
        font-size: 1.1rem;
    }

    .hero-section {
        padding: 100px 0;
        background-attachment: scroll;
    }

    .hero-section h1 {
        font-size: 3.5rem;
    }

    .hero-section h1::before {
        font-size: 2rem;
        margin-bottom: 15px;
    }

    .filter-section {
        padding: 40px 30px;
        margin: -60px 10px 50px;
    }

    .filter-section h3 {
        font-size: 2.2rem;
    }

    .filter-section h3::before,
    .filter-section h3::after {
        font-size: 2rem;
        margin-left: 15px;
        margin-right: 15px;
    }

    .search-input,
    .search-btn,
    .price-filter,
    .status-filter {
        font-size: 1.1rem;
        padding: 18px 22px;
    }

    .category-filter .btn {
        font-size: 1rem;
        padding: 14px 28px;
        margin: 6px;
    }

    .bike-card {
        margin-bottom: 30px;
    }

    .bike-card img {
        height: 240px;
    }

    .bike-card .card-body {
        padding: 30px;
    }

    .bike-card .card-title {
        font-size: 1.6rem;
    }

    .bike-card .card-text {
        font-size: 1.3rem;
    }

    .contact-bar .btn {
        font-size: 0.9rem;
        padding: 12px 18px;
        margin: 0 4px;
    }

    .activity-section h2 {
        font-size: 2.5rem;
    }

    .activity-section h2::before {
        font-size: 2.2rem;
    }

    .swiper {
        padding: 0 40px;
    }

    .swiper-button-prev,
    .swiper-button-next {
        width: 50px;
        height: 50px;
    }
}

@media (max-width: 576px) {
    .navbar-brand {
        font-size: 1.8rem;
    }

    .navbar-brand::before,
    .navbar-brand::after {
        font-size: 1.2rem;
    }

    .hero-section {
        padding: 80px 0;
    }

    .hero-section h1 {
        font-size: 2.8rem;
        line-height: 1.1;
    }

    .hero-section h1::before {
        font-size: 1.8rem;
    }

    .hero-section h1::after {
        width: 150px;
        height: 3px;
    }

    .hero-section p {
        font-size: 1.2rem;
    }

    .hero-section .btn {
        padding: 18px 35px;
        font-size: 1.1rem;
    }

    .filter-section {
        padding: 30px 25px;
        margin: -50px 10px 40px;
    }

    .filter-section h3 {
        font-size: 2rem;
    }

    .filter-section h3::before,
    .filter-section h3::after {
        font-size: 1.5rem;
        margin-left: 12px;
        margin-right: 12px;
    }

    .search-input,
    .search-btn,
    .price-filter,
    .status-filter {
        font-size: 1rem;
        padding: 16px 20px;
    }

    .category-filter .btn {
        font-size: 0.9rem;
        padding: 12px 24px;
        margin: 4px;
    }

    .bike-card {
        margin-bottom: 25px;
    }

    .bike-card img {
        height: 220px;
    }

    .bike-card .card-body {
        padding: 25px;
    }

    .bike-card .card-title {
        font-size: 1.4rem;
    }

    .bike-card .card-text {
        font-size: 1.2rem;
    }

    .bike-card .status-badge {
        font-size: 0.9rem;
        padding: 10px 18px;
        top: 20px;
        right: 20px;
    }

    .bike-card .category-icon {
        font-size: 1.7rem;
        padding: 14px;
        top: 20px;
        left: 20px;
    }

    .contact-bar {
        padding: 15px 0;
    }

    .contact-bar .btn {
        font-size: 0.8rem;
        padding: 10px 14px;
        margin: 0 3px;
    }

    .pagination .page-link {
        padding: 10px 15px;
        font-size: 0.95rem;
    }

    footer {
        margin-bottom: 70px;
        padding: 40px 0;
    }

    .activity-section {
        padding: 60px 0;
    }

    .activity-section h2 {
        font-size: 2.2rem;
    }

    .activity-section h2::before {
        font-size: 2rem;
    }

    .activity-section h2::after {
        width: 200px;
        height: 3px;
    }

    .image-gallery .gallery-item img {
        height: 220px;
    }

    .swiper {
        padding: 0 30px;
    }

    .swiper-button-prev,
    .swiper-button-next {
        width: 45px;
        height: 45px;
    }

    .swiper-button-prev::after,
    .swiper-button-next::after {
        font-size: 16px;
    }
}