/* --- Google Fonts Import --- */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@600;700&family=Roboto:wght@400;500&display=swap');

/* --- CSS Variables --- */
:root {
    --primary-color: #007BFF; /* Яркий синий для акцентов и кнопок */
    --secondary-color: #1a2533; /* Темно-синий для фонов секций */
    --background-color: #0f172a; /* Очень темный фон для body */
    --text-color: #e0e0e0; /* Светло-серый для основного текста */
    --heading-color: #ffffff; /* Белый для заголовков */
    --border-color: #3a4a5f;
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Roboto', sans-serif;
    --container-width: 1140px;
}

/* --- Global Styles & Reset --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-secondary);
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3 {
    font-family: var(--font-primary);
    color: var(--heading-color);
    margin-bottom: 20px;
}

h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 40px;
}

section {
    padding: 80px 0;
    border-bottom: 1px solid var(--border-color);
}

section:last-of-type {
    border-bottom: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* --- Header --- */
.main-header {
    background-color: rgba(15, 23, 42, 0.8);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
}

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

.logo {
    font-family: var(--font-primary);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--heading-color);
    text-decoration: none;
}

.main-nav ul {
    display: flex;
    list-style: none;
    gap: 25px;
}

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

.main-nav a:hover {
    color: var(--primary-color);
}

.header-contacts {
    display: flex;
    align-items: center;
    gap: 20px;
}

.address-text {
    font-size: 0.9rem;
}

.email-button {
    background-color: var(--primary-color);
    color: #fff;
    padding: 8px 16px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.email-button:hover {
    background-color: #0056b3;
}

.mobile-menu-button {
    display: none;
    background: none;
    border: none;
    color: #fff;
    font-size: 2rem;
    cursor: pointer;
}

/* --- Hero Section --- */
.hero-section {
    padding-top: 100px;
}

.hero-container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.hero-content {
    flex: 1;
}

.hero-image {
    flex: 1;
}

.hero-content h1 {
    font-size: 3rem;
    line-height: 1.2;
}

.hero-content .subtitle {
    font-size: 1.1rem;
    margin-bottom: 30px;
}

.hero-benefits {
    list-style: none;
    padding-left: 20px;
}

.hero-benefits li {
    margin-bottom: 15px;
    position: relative;
}

.hero-benefits li::before {
    content: '✓';
    color: var(--primary-color);
    position: absolute;
    left: -20px;
}

/* --- Tabs (Specs Section) --- */
.tabs-nav {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
}

.tab-button {
    padding: 10px 20px;
    border: 1px solid var(--border-color);
    background-color: transparent;
    color: var(--text-color);
    cursor: pointer;
    border-radius: 5px;
    transition: all 0.3s ease;
}

.tab-button:hover {
    background-color: var(--secondary-color);
}

.tab-button.active {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: #fff;
}

.tab-content {
    display: none;
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: 8px;
}

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

.tab-content ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

/* --- Details Section --- */
.details-container {
    display: flex;
    align-items: center;
    gap: 50px;
}

.details-text {
    flex: 1;
}

.details-image {
    flex: 1;
    text-align: center;
}
.details-image img {
    border-radius: 8px;
}

/* --- Advantages Section --- */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-item {
    background-color: var(--secondary-color);
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    transition: transform 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-5px);
}

.advantage-item .icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

/* --- Package Section --- */
.package-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    background-color: var(--secondary-color);
    padding: 40px;
    border-radius: 8px;
}

.package-column ol {
    padding-left: 20px;
}

.package-column li {
    margin-bottom: 10px;
}

/* --- Applications Section --- */
.applications-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}
.application-item {
    background-color: var(--secondary-color);
    padding: 20px;
    border-radius: 8px;
    border-left: 3px solid var(--primary-color);
}

/* --- Requirements & Pricing --- */
.requirements-list {
    list-style: none;
    max-width: 800px;
    margin: 0 auto;
}
.requirements-list li {
    background-color: var(--secondary-color);
    margin-bottom: 10px;
    padding: 15px;
    border-radius: 5px;
}

.pricing-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}
.pricing-table th, .pricing-table td {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}
.pricing-table thead {
    background-color: var(--secondary-color);
}
.pricing-table .highlight {
    background-color: rgba(0, 123, 255, 0.1);
    border-left: 3px solid var(--primary-color);
}
.pricing-table .highlight strong {
    color: var(--primary-color);
}

/* --- Gallery Section --- */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
}
.gallery-image {
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.3s ease, filter 0.3s ease;
}
.gallery-image:hover {
    transform: scale(1.05);
    filter: brightness(1.2);
}

/* --- FAQ & Reviews Section --- */
.faq-item {
    border-bottom: 1px solid var(--border-color);
    padding: 20px 0;
}
.faq-item:last-child {
    border-bottom: none;
}
.faq-item h3 {
    cursor: pointer;
}
.reviews-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}
.review-item {
    background-color: var(--secondary-color);
    padding: 25px;
    border-radius: 8px;
}
.review-item .stars {
    color: #FFC107;
    font-size: 1.2rem;
    margin-bottom: 10px;
}
.review-author {
    margin-top: 15px;
    font-size: 0.9rem;
    color: #aaa;
}

/* --- Contact Section --- */
.contact-section {
    text-align: center;
    background-color: var(--secondary-color);
}
.cta-button {
    display: inline-block;
    background-color: var(--primary-color);
    color: #fff;
    padding: 15px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-family: var(--font-primary);
    font-size: 1.2rem;
    margin-top: 20px;
    transition: all 0.3s ease;
}
.cta-button:hover {
    background-color: #0056b3;
    transform: translateY(-3px);
}

/* --- Footer --- */
.main-footer {
    padding: 30px 0;
    text-align: center;
    background-color: #0c121e;
}

.main-footer .privacy-notice {
    font-size: 0.8rem;
    color: #666;
    margin-top: 15px;
}

/* --- Responsive Styles --- */

/* Tablets */
@media (max-width: 992px) {
    .advantages-grid, .applications-grid, .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .reviews-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile */
@media (max-width: 768px) {
    h2 { font-size: 2rem; }
    
    .main-nav, .header-contacts {
        display: none; /* Скрываем навигацию и контакты, потребуется JS для мобильного меню */
    }
    .mobile-menu-button {
        display: block; /* Показываем кнопку-гамбургер */
    }

    .hero-container, .details-container {
        flex-direction: column;
        text-align: center;
    }
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .package-container {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid, .applications-grid, .gallery-grid, .reviews-grid {
        grid-template-columns: 1fr;
    }

    .tabs-nav {
        flex-direction: column;
    }
}
.tab-content {
  display: none; /* Прячем все блоки с контентом */
}

.tab-content.active {
  display: block; /* Показываем только блок с классом .active */
}

.tab-button {
    cursor: pointer; /* Меняем курсор при наведении на кнопку */
}

/* Необязательно: стили для активной кнопки, чтобы было видно, какая выбрана */
.tab-button.active {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
}