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

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #333333 100%);
    color: white;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-img {
    height: 50px;
    width: 50px;
    border-radius: 50%;
    border: 3px solid white;
    object-fit: cover;
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.logo-text h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0;
    color: #fff;
}

.logo-text p {
    font-size: 0.8rem;
    opacity: 0.8;
    margin: 0;
    color: #ccc;
}

.nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.nav a:hover {
    opacity: 0.8;
}

.nav a[target="_blank"] {
    background: linear-gradient(45deg, #ff0050, #ff4081);
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.nav a[target="_blank"]:hover {
    opacity: 1;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(255, 0, 80, 0.3);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    width: 30px;
    height: 30px;
    justify-content: space-around;
    position: relative;
    z-index: 1001;
    outline: none;
}

.mobile-menu-btn span {
    display: block;
    height: 3px;
    width: 100%;
    background: white;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #333333 100%);
    color: white;
    padding: 150px 0 100px;
    text-align: center;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><polygon fill="%23ffffff" fill-opacity="0.02" points="0,1000 1000,0 1000,1000"/></svg>');
    background-size: cover;
}

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

.hero-content h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0.9;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

.cta-btn {
    display: inline-block;
    background: white;
    color: #000;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
}

.cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
    background: transparent;
    color: white;
    border: 2px solid white;
}

/* Products Section */
.products {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: #333;
    font-weight: 600;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    cursor: pointer;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.2);
}

.product-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image {
    transform: scale(1.05);
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: #333;
}

.product-info p {
    color: #666;
    margin-bottom: 1rem;
}

.product-price {
    font-size: 1.1rem;
    font-weight: 600;
    color: #000;
}

.product-images-count {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: white;
    padding: 5px 10px;
    border-radius: 15px;
    font-size: 0.8rem;
}

.product-card {
    position: relative;
}

/* About Section */
.about {
    padding: 80px 0;
    background: white;
}

.about p {
    text-align: center;
    font-size: 1.1rem;
    max-width: 800px;
    margin: 0 auto;
    color: #666;
    line-height: 1.8;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 1rem;
    color: #ccc;
}

.footer-section p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: white;
    font-size: 1.5rem;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: #ff0050;
    transform: scale(1.1);
}

.social-links a {
    transition: color 0.3s ease, transform 0.3s ease;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    opacity: 0.7;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.8);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: white;
    margin: 5% auto;
    padding: 0;
    border-radius: 15px;
    width: 90%;
    max-width: 1000px;
    max-height: 80vh;
    overflow: hidden;
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 20px;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    z-index: 10;
    background: rgba(0,0,0,0.5);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.close:hover {
    background: rgba(0,0,0,0.8);
}

.modal-body {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 0;
    height: 100%;
}

.image-slider {
    position: relative;
    height: 500px;
    overflow: hidden;
}

.slider-container {
    display: flex;
    transition: transform 0.3s ease;
    height: 100%;
}

.slider-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    flex-shrink: 0;
}

.slider-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    padding: 15px;
    cursor: pointer;
    font-size: 1.2rem;
    border-radius: 50%;
    transition: background 0.3s ease;
}

.slider-btn:hover {
    background: rgba(0,0,0,0.8);
}

.slider-btn.prev {
    left: 20px;
}

.slider-btn.next {
    right: 20px;
}

.product-info {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-info h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: #333;
}

.product-info p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.price {
    font-size: 1.5rem;
    font-weight: 600;
    color: #000;
    margin-bottom: 2rem;
}

.buy-btn {
    background: linear-gradient(135deg, #000000 0%, #333333 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.buy-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
    background: rgb(51, 51, 51);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Responsive Design */
@media (max-width: 768px) {
    .header .container {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .nav {
        position: fixed;
        top: 95px;
        left: 0;
        width: 100%;
        background: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #333333 100%);
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
        z-index: 1000;
        box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    }
    
    .nav.active {
        opacity: 1;
        visibility: visible;
    }
    
    .nav ul {
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        list-style: none;
        margin: 0;
    }
    
    .nav li {
        border-bottom: 1px solid rgba(255,255,255,0.1);
    }
    
    .nav li:last-child {
        border-bottom: none;
    }
    
    .nav a {
        display: block;
        padding: 1rem 2rem;
        font-size: 1.1rem;
        transition: background 0.3s ease;
    }
    
    .nav a:hover {
        background: rgba(255,255,255,0.1);
        opacity: 1;
    }
    
    .nav a[target="_blank"] {
        background: linear-gradient(45deg, #ff0050, #ff4081);
        margin: 0.5rem 1rem;
        border-radius: 25px;
        text-align: center;
    }
    
    .nav a[target="_blank"]:hover {
        transform: none;
        box-shadow: 0 3px 10px rgba(255, 0, 80, 0.3);
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .modal-body {
        grid-template-columns: 1fr;
    }
    
    .image-slider {
        height: 300px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero-content h2 {
        font-size: 1.5rem;
    }
    
    .products, .about {
        padding: 60px 0;
    }
    
    .modal-content {
        width: 95%;
        margin: 10% auto;
    }
}