/* Reset và Base Styles */
* {
    margin: 1;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header */
.header {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    width: 100%;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
    width: 100%;
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo {
    height: 40px;
    width: auto;
    max-width: 100%;
}

.brand-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: #1d4f91;
    white-space: nowrap;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    white-space: nowrap;
    padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link.active {
    color: #1d4f91;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-shrink: 0;
}

.language-selector {
    display: flex;
    gap: 0.5rem;
}

.lang-btn {
    padding: 0.5rem 1rem;
    border: 1px solid #ddd;
    background: #fff;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 4px;
    font-size: 0.9rem;
}

.lang-btn.active {
    background: #1d4f91;
    color: #fff;
    border-color: #1d4f91;
}

.cart-btn {
    position: relative;
    padding: 0.5rem;
    color: #333;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cart-count {
    position: absolute;
    top: -5px;
    right: -5px;
    background: #e74c3c;
    color: #fff;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: bold;
}

/* Hero Section */
.hero {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    margin-top: 0;
    width: 100%;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    width: 100%;
}

.hero-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: clamp(1rem, 3vw, 1.2rem);
    margin-bottom: 2.5rem;
    opacity: 0.9;
    line-height: 1.6;
    max-width: 90%;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    margin-top: 1rem;
}

.btn {
    padding: 1.2rem 2.5rem;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
    cursor: pointer;
    white-space: nowrap;
    font-size: 1rem;
    min-height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-primary {
    background: #fff;
    color: #1d4f91;
}

.btn-primary:hover {
    background: #f8f9fa;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.25);
}

.btn-secondary {
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background: #fff;
    color: #1d4f91;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.25);
}

.hero-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.hero-image img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border-radius: 15px;
    box-shadow: 0 25px 50px rgba(0,0,0,0.4);
    object-fit: cover;
}

/* Features Section */
.features {
    padding: 80px 0;
    background: #f8f9fa;
    width: 100%;
}

.section-title {
    text-align: center;
    font-size: clamp(2rem, 4vw, 2.5rem);
    margin-bottom: 3rem;
    color: #1d4f91;
    line-height: 1.2;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    width: 100%;
}

.feature-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.feature-icon {
    font-size: 3rem;
    color: #1d4f91;
    margin-bottom: 1rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
    color: #333;
    font-size: 1.3rem;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* Featured Products */
.featured-products {
    padding: 80px 0;
    width: 100%;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    width: 100%;
}

.product-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.product-image {
    height: 200px;
    overflow: hidden;
    width: 100%;
}

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

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

.product-info {
    padding: 1.5rem;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.product-info h3 {
    margin-bottom: 0.5rem;
    color: #333;
    font-size: 1.2rem;
}

.product-info p {
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.5;
    flex-grow: 1;
}

.product-features {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.feature-tag {
    background: #e3f2fd;
    color: #1976d2;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    white-space: nowrap;
}

.btn-outline {
    background: transparent;
    color: #1d4f91;
    border: 2px solid #1d4f91;
    align-self: flex-start;
}

.btn-outline:hover {
    background: #1d4f91;
    color: #fff;
    transform: translateY(-2px);
}

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

/* Solutions Section */
.solutions {
    padding: 80px 0;
    background: #f8f9fa;
    width: 100%;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    width: 100%;
}

.solution-card {
    background: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.solution-icon {
    font-size: 3rem;
    color: #1d4f91;
    margin-bottom: 1rem;
}

.solution-card h3 {
    margin-bottom: 1rem;
    color: #333;
    font-size: 1.3rem;
}

.solution-card p {
    color: #666;
    line-height: 1.6;
}

/* Footer */
.footer {
    background: #1d4f91;
    color: #fff;
    padding: 60px 0 20px;
    width: 100%;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
    width: 100%;
}

.footer-section h4 {
    margin-bottom: 1rem;
    color: #fff;
    font-size: 1.2rem;
}

.footer-section ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section a {
    color: #b3d9ff;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #fff;
}

.footer-section p {
    margin-bottom: 0.5rem;
    line-height: 1.6;
}

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

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

.social-links a:hover {
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid #2d5fa1;
    padding-top: 2rem;
    text-align: center;
    color: #b3d9ff;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        gap: 2rem;
    }
    
    .features-grid,
    .products-grid,
    .solutions-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
}

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 0;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero {
        padding: 140px 0 60px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .features-grid,
    .products-grid,
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 1.5rem;
    }
    
    .container {
        padding: 0 15px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 120px 0 40px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 0.9rem;
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .feature-card,
    .product-card,
    .solution-card {
        padding: 1.5rem;
    }
    
    .section-title {
        font-size: 1.8rem;
        margin-bottom: 2rem;
    }
    
    .features,
    .featured-products,
    .solutions {
        padding: 60px 0;
    }
}

/* Fix for mobile navigation */
@media (max-width: 768px) {
    .nav-actions {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .language-selector {
        justify-content: center;
    }
    
    .cart-btn {
        justify-content: center;
    }
}

/* Smooth scrolling and better focus states */
*:focus {
    outline: 2px solid #1d4f91;
    outline-offset: 2px;
}

/* Better button accessibility */
.btn:focus {
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* Loading states */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Print styles */
@media print {
    .header,
    .footer,
    .btn {
        display: none;
    }
    
    .hero {
        background: #fff !important;
        color: #000 !important;
        padding: 20px 0;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
}