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

:root {
    --primary-color: #0066cc;
    --secondary-color: #004080;
    --accent-color: #00aaff;
    --dark-color: #1a1a1a;
    --light-color: #f8f9fa;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e0e0e0;
    --success-color: #28a745;
    --gradient-primary: linear-gradient(135deg, #0066cc 0%, #004080 100%);
    --gradient-accent: linear-gradient(135deg, #00aaff 0%, #0066cc 100%);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
}

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

.section {
    padding: 60px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 40px;
}

.section-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark-color);
    margin-bottom: 0;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--gradient-primary);
    border-radius: 2px;
}



/* Навигация */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: linear-gradient(135deg, #003366 0%, #004080 100%);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    box-shadow: var(--shadow-lg);
    background: linear-gradient(135deg, #002950 0%, #003366 100%);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    padding: 5px 10px;
    border-radius: 8px;
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-image {
    height: 120px;
    width: auto;
    transition: var(--transition);
    display: block;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.95);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: #00aaff;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: #00aaff;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 5px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: var(--transition);
}

/* Главная секция */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0a1929 0%, #1a3a52 100%);
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(0, 170, 255, 0.2) 0%, transparent 50%);
    animation: pulse 10s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.5; }
    50% { opacity: 1; }
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="1" fill="white" opacity="0.3"/></svg>') repeat;
    opacity: 0.1;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: white;
    max-width: 900px;
}

.company-name {
    display: block;
    font-size: 2.8rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #00aaff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 20px;
    animation: fadeInUp 1s ease;
}

.hero-subtitle {
    font-size: 1.2rem;
    font-weight: 300;
    margin-bottom: 35px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s backwards;
}

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

.btn {
    display: inline-block;
    padding: 12px 35px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

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

.btn-large {
    padding: 15px 45px;
    font-size: 1.1rem;
}



/* О компании */
.about {
    background: var(--light-color);
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 40px;
    max-width: 900px;
    margin: 0 auto;
}

.about-card {
    background: white;
    padding: 35px 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    text-align: center;
}

.about-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.about-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.about-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    color: var(--dark-color);
}

.about-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Продукция */
.products {
    background: white;
}

.products-tabs {
    background: var(--light-color);
    border-radius: 15px;
    padding: 30px;
    box-shadow: var(--shadow-md);
}

.tabs-nav {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 12px;
    margin-bottom: 30px;
}

.tab-btn {
    background: white;
    border: 2px solid var(--border-color);
    padding: 15px;
    border-radius: 10px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
}

.tab-btn i {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.tab-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.tab-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: var(--primary-color);
}

.tab-btn.active i {
    color: white;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.product-intro {
    background: white;
    padding: 25px;
    border-radius: 10px;
    margin-bottom: 25px;
    box-shadow: var(--shadow-sm);
}

.product-intro h3 {
    font-size: 1.5rem;
    color: var(--dark-color);
    margin-bottom: 12px;
}

.product-intro .highlight {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.product-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 15px;
}

.product-item {
    background: white;
    padding: 15px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.product-item:hover {
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

.product-item i {
    color: var(--success-color);
    font-size: 1.2rem;
    flex-shrink: 0;
}

.product-item span {
    color: var(--text-color);
    font-weight: 500;
}

/* ИТ-решения */
.it-solutions {
    background: var(--light-color);
}

.it-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.it-category {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.it-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.it-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
}

.it-category-header i {
    font-size: 2rem;
    color: var(--primary-color);
}

.it-category-header h3 {
    font-size: 1.15rem;
    color: var(--dark-color);
}

.it-list {
    list-style: none;
}

.it-list li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-color);
    line-height: 1.6;
    font-size: 0.95rem;
}

.it-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
}

/* Инжиниринг */
.engineering {
    background: white;
}

.engineering-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.engineering-card {
    background: var(--light-color);
    padding: 30px 25px;
    border-radius: 12px;
    transition: var(--transition);
    border: 2px solid transparent;
}

.engineering-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.engineering-icon {
    width: 70px;
    height: 70px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.engineering-icon i {
    font-size: 1.8rem;
    color: white;
}

.engineering-card h3 {
    font-size: 1.2rem;
    color: var(--dark-color);
    margin-bottom: 12px;
    text-align: center;
}

.engineering-card p {
    color: var(--text-light);
    line-height: 1.8;
    text-align: center;
}

/* Преимущества */
.advantages {
    background: var(--light-color);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.advantage-card {
    background: white;
    padding: 30px 25px;
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: var(--transition);
}

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

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.advantage-number {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary-color);
    opacity: 0.1;
    position: absolute;
    top: 20px;
    right: 20px;
}

.advantage-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.advantage-card h3 {
    font-size: 1.3rem;
    color: var(--dark-color);
    margin-bottom: 12px;
}

.advantage-card p {
    color: var(--text-light);
    line-height: 1.8;
}

/* Призыв к действию */
.cta {
    background: var(--gradient-primary);
    color: white;
    text-align: center;
}

.cta-content h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 1.1rem;
    margin-bottom: 12px;
    opacity: 0.95;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.cta-highlight {
    font-weight: 600;
    font-size: 1.15rem !important;
    margin-bottom: 25px !important;
}

/* Контакты */
.contact {
    background: var(--light-color);
}

.contact-grid {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 30px;
    flex-wrap: wrap;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    background: white;
    padding: 30px 25px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    flex: 0 1 280px;
}

.contact-card.full-width {
    flex: 1 1 100%;
    max-width: 600px;
    margin: 0 auto;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-card.full-width {
    flex: 1 1 100%;
    max-width: 600px;
    margin: 0 auto;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 15px;
}

.contact-icon i {
    font-size: 1.5rem;
    color: white;
}

.contact-card h3 {
    font-size: 1.15rem;
    color: var(--dark-color);
    margin-bottom: 12px;
}

.contact-card a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 1.1rem;
    transition: var(--transition);
}

.contact-card a:hover {
    color: var(--accent-color);
}

.contact-card p {
    color: var(--text-color);
    font-size: 1.1rem;
}

/* Футер */
.footer {
    background: var(--dark-color);
    color: white;
    padding: 30px 0;
}

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

.footer-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 15px;
}

.footer-logo-image {
    height: 140px;
    width: auto;
    opacity: 0.95;
}

.footer-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* Кнопка "Наверх" */
.scroll-top-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
}

.scroll-top-btn.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top-btn:hover {
    transform: translateY(-5px);
}

/* Адаптивность */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        flex-direction: column;
        background: white;
        width: 100%;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        transition: var(--transition);
    }

    .nav-menu.active {
        left: 0;
    }

    .section {
        padding: 40px 0;
    }

    .company-name {
        font-size: 1.8rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .tabs-nav {
        grid-template-columns: 1fr;
    }

    .product-list {
        grid-template-columns: 1fr;
    }

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

    .about-grid,
    .engineering-grid,
    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .advantage-number {
        font-size: 3rem;
    }

    .cta-content h2 {
        font-size: 1.8rem;
    }

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

    .scroll-top-btn {
        width: 45px;
        height: 45px;
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 50px 0;
    }

    .section {
        padding: 35px 0;
    }

    .company-name {
        font-size: 1.5rem;
    }

    .logo-image {
        height: 100px;
    }
    
    .logo {
        padding: 3px 8px;
    }

    .btn {
        padding: 12px 30px;
        font-size: 0.9rem;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .products-tabs,
    .about-card,
    .engineering-card,
    .advantage-card,
    .contact-card {
        padding: 25px 20px;
    }
}