/* Reset и базовые стили */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #1a73e8;
    --primary-dark: #0d47a1;
    --secondary: #f8f9fa;
    --text: #333;
    --text-light: #666;
    --white: #fff;
    --shadow: 0 4px 12px rgba(0,0,0,0.1);
    --transition: all 0.3s ease;
}

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

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

/* Хедер */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo-placeholder {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

/* Навигация */
.nav {
    display: flex;
    align-items: center;
    gap: 25px;
}

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

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

.nav-buttons {
    display: flex;
    align-items: center;
    gap: 15px;
}

.language-switcher,
.sidebar-toggle,
.cta-button {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.language-switcher:hover,
.sidebar-toggle:hover,
.cta-button:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Выпадающее меню */
.dropdown {
    position: relative;
    display: none;
}

.dropdown-toggle {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
    transition: var(--transition);
}

.dropdown-toggle:hover {
    background: var(--primary-dark);
}

.dropdown-toggle .arrow {
    font-size: 0.8rem;
    transition: transform 0.3s ease;
}

.dropdown.active .dropdown-toggle .arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    border-radius: 5px;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(5px);
}

.dropdown-menu .nav-link {
    display: block;
    padding: 12px 20px;
    border-bottom: 1px solid #eee;
    text-decoration: none;
    color: var(--text);
    transition: var(--transition);
    white-space: nowrap;
}

.dropdown-menu .nav-link:last-child {
    border-bottom: none;
}

.dropdown-menu .nav-link:hover {
    background: var(--secondary);
    color: var(--primary);
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: var(--white);
    padding: 180px 0 120px;
    text-align: center;
    margin-top: 70px;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero-subtitle {
    font-size: 1.3rem;
    margin-bottom: 2.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

.cta-button {
    font-size: 1.1rem;
    padding: 15px 30px;
}

/* Секции */
.section {
    padding: 100px 0;
}

.section:nth-child(even) {
    background: var(--secondary);
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 3rem;
    position: relative;
}

h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary);
}

/* Анимация появления */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Анимации для текста с задержкой */
.fade-in h1,
.fade-in h2,
.fade-in h3,
.fade-in h4,
.fade-in h5,
.fade-in h6,
.fade-in p,
.fade-in li,
.fade-in span,
.fade-in a {
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease;
}

.fade-in.visible h1,
.fade-in.visible h2,
.fade-in.visible h3,
.fade-in.visible h4,
.fade-in.visible h5,
.fade-in.visible h6,
.fade-in.visible p,
.fade-in.visible li,
.fade-in.visible span,
.fade-in.visible a {
    opacity: 1;
    transform: translateY(0);
}

/* О компании */
.lead {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 1.5rem;
}

.content-grid {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.content-text p {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

/* Услуги */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.15);
}

.service-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.3rem;
}

/* Преимущества */
.advantages-list {
    max-width: 800px;
    margin: 0 auto;
}

.advantage-item {
    background: var(--white);
    padding: 30px;
    margin-bottom: 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--primary);
}

.advantage-item h4 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

/* Кейсы */
.case-study {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    max-width: 900px;
    margin: 0 auto;
}

.case-study h3 {
    color: var(--primary);
    text-align: center;
    margin-bottom: 2rem;
}

.case-section {
    margin-bottom: 2rem;
}

.case-section h4 {
    color: var(--text);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.case-section ul {
    list-style-position: inside;
    margin-left: 1rem;
}

.case-section li {
    margin-bottom: 0.5rem;
}

/* Вакансии */
.vacancies-content {
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.vacancies-content p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.vacancy-link {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 12px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.vacancy-link:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Контакты */
.contacts-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 600px;
    margin: 0 auto;
}

.contact-info {
    background: var(--white);
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-item {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid #eee;
}

.contact-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

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

.contact-item a {
    color: var(--text);
    text-decoration: none;
    transition: var(--transition);
}

.contact-item a:hover {
    color: var(--primary);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 0.5rem;
}

.social-link {
    background: var(--primary);
    color: var(--white) !important;
    padding: 8px 15px;
    border-radius: 5px;
    font-size: 0.9rem;
}

.social-link:hover {
    background: var(--primary-dark);
}

/* Футер */
.footer {
    background: #2c3e50;
    color: var(--white);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
    margin-bottom: 30px;
}

.company-info h4 {
    margin-bottom: 1rem;
    color: var(--white);
}

.company-info p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.footer-nav {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-nav a {
    color: var(--white);
    text-decoration: none;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-nav a:hover {
    opacity: 1;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    opacity: 0.7;
}

/* Сайдбар */
.sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100%;
    background: var(--white);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 1001;
    overflow-y: auto;
}

.sidebar.active {
    right: 0;
}

.sidebar-content {
    padding: 40px 30px;
    position: relative;
}

.sidebar-close {
    position: absolute;
    top: 15px;
    right: 15px;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
}

.sidebar h3 {
    margin-bottom: 1.5rem;
    color: var(--primary);
}

.application-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.application-form input,
.application-form textarea {
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
    font-family: inherit;
}

.application-form button {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 12px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: var(--transition);
}

.application-form button:hover {
    background: var(--primary-dark);
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Кнопка прокрутки наверх */
.scroll-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--primary);
    color: var(--white);
    border: none;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s ease;
    z-index: 999;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
}

.scroll-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* Адаптивность */
@media (max-width: 768px) {
    .dropdown {
        display: block;
    }
    
    .nav > .nav-link:not(.dropdown-menu .nav-link) {
        display: none;
    }
    
    .nav-buttons {
        gap: 10px;
    }
    
    .sidebar {
        width: 100%;
        right: -100%;
    }
    
    .section {
        padding: 80px 0;
    }
    
    .hero {
        padding: 150px 0 100px;
        margin-top: 60px;
    }
    
    .hero h1 {
        font-size: 2.2rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }
}

@media (min-width: 769px) {
    .dropdown {
        display: none;
    }
    
    .nav > .nav-link:not(.dropdown-menu .nav-link) {
        display: block;
    }
}