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

body {
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* Header Styles */
.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;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0;
    height: 56px; /* fixed, robust header height */
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: inherit;
}

.logo-img { width: 28px; height: 28px; object-fit: contain; }

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1;
}

.logo-main {
    font-size: 1.1rem;
    font-weight: 700;
    color: #333;
}

.logo-sub {
    font-size: 0.7rem;
    color: #666;
    font-weight: 500;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 1.25rem;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #555;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #bfbfbf;
    transition: width 0.3s ease;
}

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    transition: all 0.3s ease;
}

/* Main Content */
.main {
    margin-top: 72px; /* room for fixed header */
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 2.5rem 0; /* reduce hero vertical size */
    position: relative;
    overflow: hidden;
}

/* removed subtle grain overlay per request */

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text {
    max-width: 500px;
}

.hero-intro {
    font-size: 1.5rem;
    font-weight: 300;
    color: #666;
    display: block;
    margin-bottom: 0.5rem;
}

.hero-name {
    font-size: 3.5rem;
    font-weight: 700;
    color: #333;
    display: block;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.hero-description {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
}

.btn-primary {
    background: #e9ecef;
    color: #333;
    border: 1px solid #dfe3e8;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.08);
    background: #f3f4f6;
}

.btn-secondary {
    background: transparent;
    color: #333;
    border: 2px solid #333;
}

.btn-secondary:hover {
    background: #333;
    color: white;
}

.hero-image {
    display: flex;
    justify-content: center;
}

/* Hero Carousel */
.hero-carousel {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
}

.slides {
    position: relative;
    height: 360px; /* smaller hero image area */
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 0.6s ease;
}

.slide.active {
    opacity: 1;
}

.hero-img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* show full image without cropping */
    background: #fff; /* letterbox background */
    display: block;
}

.carousel-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.45);
    color: #fff;
    border: none;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 2;
    transition: background 0.2s ease, transform 0.2s ease;
}

.carousel-control:hover {
    background: rgba(0, 0, 0, 0.6);
    transform: translateY(-50%) scale(1.05);
}

.carousel-control.prev { left: 12px; }
.carousel-control.next { right: 12px; }

.carousel-dots {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 14px;
    display: flex;
    gap: 8px;
    z-index: 2;
}

.dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.7);
    border: none;
    cursor: pointer;
}

.dot.active {
    background: #ffffff;
    box-shadow: 0 0 0 2px rgba(0,0,0,0.15);
}

/* Lightbox (fullscreen image) */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.85);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.lightbox-overlay.active { display: flex; }

.lightbox-image {
    max-width: 95vw;
    max-height: 95vh;
    object-fit: contain;
    box-shadow: 0 10px 40px rgba(0,0,0,0.5);
    border-radius: 8px;
}

.hero-carousel img { cursor: zoom-in; }

.lightbox-control {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(255,255,255,0.15);
    color: #fff;
    border: none;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s ease;
}

.lightbox-control:hover { background: rgba(255,255,255,0.25); }
.lb-prev { left: 24px; }
.lb-next { right: 24px; }

/* Section Styles */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #333;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.1rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Products Section */
.products {
    padding: 4rem 0;
    background: white;
}

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

.product-card {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #e9ecef;
}
.product-thumb {
    background: transparent;
    border: none;
    padding: 0;
    width: 100%;
    cursor: pointer;
}


.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.product-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #e9ecef 0%, #dfe3e8 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: #333;
    font-size: 1.5rem;
}

.product-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

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

/* Product images in grid */
.product-img {
    width: 100%;
    height: 240px;
    object-fit: contain;
    display: block;
    cursor: zoom-in;
}

/* Certificate Section */
.certificate {
    padding: 4rem 0;
    background: #f8f9fa;
}

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

.certificate-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.certificate-item:hover {
    transform: translateY(-3px);
}

.certificate-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.2rem;
}

.certificate-item h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.certificate-item p {
    color: #666;
    font-size: 0.9rem;
}

/* MSDS Section */
.msds {
    padding: 4rem 0;
    background: white;
}

.msds-content {
    max-width: 800px;
    margin: 0 auto;
}

.msds-info {
    background: #f8f9fa;
    padding: 3rem;
    border-radius: 12px;
    text-align: center;
}

.msds-info h3 {
    font-size: 1.8rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 1rem;
}

.msds-info p {
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.download-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #e9ecef;
    color: #333;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: transform 0.3s ease;
    border: 1px solid #dfe3e8;
}

.download-link:hover {
    transform: translateY(-2px);
}

/* Certificate page tweaks */
.certificate .hero-carousel {
    margin: 0 auto; /* center the certificate image block */
}

/* MSDS page tweaks */
.msds .hero-carousel {
    margin: 0 auto; /* center the msds image block */
}

.certificate .download-current {
    background: #e9ecef; /* neutral, similar to page background */
    color: #333;
    border: 1px solid #dfe3e8;
}

.certificate .download-current:hover {
    background: #f3f4f6;
}

/* Contact Section */
.contact {
    padding: 4rem 0;
    background: #f8f9fa;
}

.contact-content {
    max-width: 1100px;
    margin: 0 auto;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    border: 1px solid #eee;
    margin-top: 2rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.form-field { margin-bottom: 1rem; }

.form-field label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: #333;
}

.form-field input,
.form-field textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #ddd;
    border-radius: 8px;
    outline: none;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-field input:focus,
.form-field textarea:focus {
    border-color: #b0b0b0;
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.08);
}

.form-actions { margin-top: 0.5rem; }
.form-note { color: #666; font-size: 0.9rem; margin-top: 0.75rem; }
.hp-field { display: none; }

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

.contact-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-3px);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, #e9ecef 0%, #dfe3e8 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #333;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.contact-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #333;
    margin-bottom: 0.5rem;
}

.contact-details p {
    color: #666;
    line-height: 1.5;
}

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 2rem 0;
}

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

.footer-logo .logo-main {
    color: white;
}

.footer-logo .logo-sub {
    color: #ccc;
}

.footer-info p {
    color: #ccc;
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-name {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    .carousel-control {
        width: 48px;
        height: 48px;
    }
    .lightbox-control {
        width: 52px;
        height: 52px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .slides {
        height: 320px;
    }
    
    .hero-name {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .products-grid,
    .certificate-grid {
        grid-template-columns: 1fr;
    }
}