/* Reset và thiết lập cơ bản */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
    padding-top: 70px;
}

/* Navigation Bar */
.navbar {
    background: #2c3e50;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
    z-index: 9999;
    transition: transform 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
    z-index: 10000;
}

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

.nav-menu li {
    margin: 0;
    padding: 0;
}

.nav-menu a {
    display: inline-block;
    padding: 1rem 1.5rem;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    height: 70px;
    line-height: 38px;
    white-space: nowrap;
}

.nav-menu a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: translateX(-50%);
    transition: width 0.3s ease;
}

.nav-menu a:hover::before,
.nav-menu a.active::before {
    width: 80%;
}

.nav-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
}

.nav-menu a.active {
    background: rgba(102, 126, 234, 0.2);
}

/* Menu toggle button for mobile */
.menu-toggle {
    display: none;
    flex-direction: column;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 10000;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    margin: 3px 0;
    transition: all 0.3s ease;
    border-radius: 3px;
}

/* Header */
header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    text-align: center;
    padding: 3rem 1rem;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1%, transparent 1%);
    background-size: 50px 50px;
    animation: backgroundMove 20s linear infinite;
}

@keyframes backgroundMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
    animation: fadeInDown 1s ease-out;
}

header p {
    font-size: 1.3rem;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s ease-out 0.3s backwards;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Hình ảnh công ty */
.company-image {
    width: 100%;
    max-width: 800px;
    height: auto;
    margin: 2rem auto;
    display: block;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    opacity: 0;
    animation: fadeIn 1s ease-out 0.5s forwards;
}

.company-image:hover {
    transform: scale(1.02) translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

/* Phần thông tin */
.info-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 2.5rem;
    border-radius: 15px;
    margin: 3rem 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    opacity: 0;
    animation: fadeInUp 1s ease-out 0.7s forwards;
}

.info-section h2 {
    color: #667eea;
    margin-bottom: 1.5rem;
    font-size: 2.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.info-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 2px;
}

.info-section p {
    font-size: 1.1rem;
    color: #555;
    line-height: 1.8;
}

/* Grid thông tin */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.info-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(30px);
}

.info-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.info-card:hover::before {
    transform: scaleX(1);
}

.info-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 25px rgba(102, 126, 234, 0.2);
}

.info-card h3 {
    color: #764ba2;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.info-card p {
    color: #666;
    line-height: 1.8;
}

/* Nút scroll to top */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
    z-index: 1000;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(102, 126, 234, 0.5);
}

.scroll-top.show {
    display: flex;
}

/* Footer */
footer {
    background: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 4rem;
    position: relative;
}

footer p {
    font-size: 1rem;
}

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Process Steps (Factory page) */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.process-step {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.process-step:hover {
    transform: translateY(-5px);
}

.step-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 1rem;
}

.process-step h3 {
    color: #764ba2;
    margin-bottom: 0.5rem;
}

/* Gallery (Factory page) */
.gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.gallery-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
    cursor: pointer;
}

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

/* Products Grid (Products page) */
.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 5px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(102, 126, 234, 0.2);
}

.product-image {
    position: relative;
    width: 100%;
    height: 250px;
    overflow: hidden;
}

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

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: bold;
}

.product-badge.hot {
    background: linear-gradient(135deg, #f093fb, #f5576c);
}

.product-badge.sale {
    background: linear-gradient(135deg, #4facfe, #00f2fe);
}

.product-info {
    padding: 1.5rem;
}

.product-info h3 {
    color: #2c3e50;
    margin-bottom: 0.8rem;
    font-size: 1.4rem;
}

.product-description {
    color: #666;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}

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

.product-features span {
    background: #f0f0f0;
    color: #666;
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
}

.product-price {
    font-size: 1.5rem;
    font-weight: bold;
    color: #667eea;
    margin-bottom: 1rem;
}

.product-btn {
    width: 100%;
    padding: 0.8rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.product-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding-top: 60px;
    }

    .nav-container {
        height: 60px;
        padding: 0 1rem;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: #2c3e50;
        flex-direction: column;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        width: 100%;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        max-height: 500px;
    }

    .nav-menu li {
        width: 100%;
    }

    .nav-menu a {
        width: 100%;
        height: auto;
        line-height: 1.6;
        padding: 1rem 2rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        text-align: left;
    }

    .nav-menu a::before {
        display: none;
    }

    header h1 {
        font-size: 2rem;
    }

    header p {
        font-size: 1rem;
    }

    .info-section h2 {
        font-size: 1.8rem;
    }

    .info-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .container {
        padding: 1rem;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .process-grid {
        grid-template-columns: 1fr;
    }
}