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

:root {
    --primary-color: #1a5490;
    --secondary-color: #3b82f6;
    --accent-color: #10b981;
    --text-dark: #1f2937;
    --text-light: #6b7280;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

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

/* Navigation */
.navbar {
    background: var(--bg-white);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo h1 {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: 700;
}

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

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: var(--secondary-color);
}

.lang-btn {
    background: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: background 0.3s ease;
}

.lang-btn:hover {
    background: var(--primary-color);
}

/* Hero Section */
.hero {
    position: relative;
    height: 600px;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

#moleculeCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    color: white;
    animation: fadeInDown 0.8s ease;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.hero-content p {
    font-size: 1.5rem;
    opacity: 0.9;
}

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

/* About Section */
.about {
    padding: 5rem 0;
    background: var(--bg-white);
}

.about h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.about-content {
    background: var(--bg-light);
    padding: 2rem;
    border-radius: 8px;
    margin-bottom: 3rem;
    line-height: 1.8;
}

.about-content p {
    margin-bottom: 1.5rem;
    color: var(--text-dark);
}

.products-section h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.product-item {
    background: var(--bg-light);
    padding: 1.5rem;
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.product-item p {
    margin: 0;
    color: var(--text-dark);
    font-weight: 500;
}

/* Contact Section */
.contact {
    padding: 5rem 0;
    background: var(--bg-light);
}

.contact h2 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-top: 2rem;
}

.contact-info {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.contact-info h3 {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    font-size: 1.3rem;
}

.info-item {
    margin-bottom: 1.5rem;
}

.info-item strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 0.5rem;
}

.info-item p {
    color: var(--text-light);
    margin: 0;
}

.info-item a {
    color: var(--secondary-color);
    text-decoration: none;
}

.info-item a:hover {
    text-decoration: underline;
}

/* Contact Form */
.contact-form {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.submit-btn {
    background: var(--secondary-color);
    color: white;
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s ease;
    width: 100%;
}

.submit-btn:hover {
    background: var(--primary-color);
}

.submit-btn:disabled {
    background: var(--text-light);
    cursor: not-allowed;
}

.form-status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 4px;
    display: none;
    text-align: center;
    font-weight: 500;
}

.form-status.success {
    background: #d1fae5;
    color: #065f46;
    display: block;
}

.form-status.error {
    background: #fee2e2;
    color: #991b1b;
    display: block;
}

/* Footer */
.footer {
    background: var(--primary-color);
    color: white;
    text-align: center;
    padding: 2rem;
    margin-top: 3rem;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .about h2,
    .contact h2 {
        font-size: 1.8rem;
    }

    .contact-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 480px) {
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        width: 100%;
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero {
        height: 400px;
    }

    .hero-content h1 {
        font-size: 1.5rem;
    }

    .hero-content p {
        font-size: 0.9rem;
    }
}