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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

/* Кнопки */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary {
    background-color: #000;
    color: #fff;
    border: 1px solid #000;
}

.btn-primary:hover {
    background-color: #333;
    border-color: #333;
}

.btn-secondary {
    background-color: transparent;
    color: #000;
    border: 1px solid #e5e5e5;
}

.btn-secondary:hover {
    background-color: #f5f5f5;
}

.btn-white {
    background-color: #fff;
    color: #000;
    border: 1px solid #e5e5e5;
}

.btn-white:hover {
    background-color: #f5f5f5;
}

/* Хедер */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid #f0f0f0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
}

.logo a {
    font-size: 24px;
    font-weight: 700;
    color: #000;
    text-decoration: none;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: #000;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #666;
}

.nav-dropdown {
    position: relative;
}

.dropdown-arrow {
    font-size: 10px;
    margin-left: 5px;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    min-width: 200px;
    list-style: none;
    padding: 10px 0;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 10px 20px;
    color: #333;
    text-decoration: none;
    transition: background-color 0.3s ease;
}

.dropdown-menu a:hover {
    background-color: #f5f5f5;
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: #000;
    transition: all 0.3s ease;
}

/* Основной контент */
.main-content {
    margin-top: 80px;
}

/* Hero секция */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1000 1000"><defs><pattern id="grid" width="50" height="50" patternUnits="userSpaceOnUse"><path d="M 50 0 L 0 0 0 50" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100%" height="100%" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text .subtitle {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 30px;
}

.hero-description {
    font-size: 16px;
    line-height: 1.6;
    opacity: 0.8;
}

.hero-image {
    position: relative;
}

.hero-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

/* Секция "О нас" */
.about-section {
    padding: 100px 0;
    background-color: #fff;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 30px;
    color: #000;
}

.about-text p {
    font-size: 16px;
    line-height: 1.6;
    color: #666;
    margin-bottom: 30px;
}

.about-image {
    position: relative;
}

.about-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 12px;
}

/* Статистика */
.stats-section {
    padding: 80px 0;
    background-color: #fff;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

.stat-card {
    text-align: center;
    padding: 40px 20px;
    background-color: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 48px;
    font-weight: 700;
    color: #000;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 18px;
    font-weight: 600;
    color: #333;
    margin-bottom: 15px;
}

.stat-description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
}

/* Темная секция */
.dark-section {
    background-color: #000;
    color: #fff;
    padding: 100px 0;
}

.dark-section h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 30px;
}

.dark-section p {
    font-size: 16px;
    line-height: 1.6;
    opacity: 0.8;
    margin-bottom: 40px;
}

.dark-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 40px;
}

.dark-images img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
}

/* Секция курсов */
.courses-section {
    padding: 100px 0;
    background-color: #fff;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: #000;
}

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

.course-card {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.course-card:hover {
    transform: translateY(-5px);
}

.course-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.course-content {
    padding: 30px;
}

.course-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #000;
}

.course-description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin-bottom: 20px;
}

.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 12px;
    color: #999;
}

/* Секция кампуса */
.campus-section {
    background-color: #000;
    color: #fff;
    padding: 100px 0;
}

.campus-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.campus-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
}

.campus-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.campus-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    padding: 30px;
    color: #fff;
}

.campus-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.campus-description {
    font-size: 14px;
    opacity: 0.9;
}

/* Секция новостей */
.news-section {
    padding: 100px 0;
    background-color: #fff;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 60px;
}

.news-card {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.news-card:hover {
    transform: translateY(-5px);
}

.news-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-content {
    padding: 20px;
}

.news-category {
    font-size: 12px;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 10px;
}

.news-date {
    font-size: 12px;
    color: #999;
    margin-bottom: 15px;
}

.news-title {
    font-size: 16px;
    font-weight: 600;
    color: #000;
    line-height: 1.4;
}

/* Контактная форма */
.contact-section {
    position: relative;
    padding: 100px 0;
    background: url('images/contact-bg.jpg');
    background-size: cover;
    background-position: center;
    color: #000;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info {
    background-color: rgba(255, 255, 255, 0.9);
    padding: 40px;
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.contact-info h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 30px;
}

.contact-info p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 30px;
    color: #333;
}

.contact-details {
    margin-bottom: 30px;
}

.contact-details p {
    font-size: 16px;
    margin-bottom: 10px;
}

.contact-details strong {
    display: block;
    margin-bottom: 5px;
}

.contact-form {
    background-color: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #000;
}

.form-group textarea {
    height: 120px;
    resize: vertical;
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 20px;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    margin: 0;
}

.checkbox-group label {
    font-size: 14px;
    color: #666;
    margin: 0;
}

/* Футер */
.footer {
    background-color: #fff;
    padding: 80px 0 40px;
    border-top: 1px solid #f0f0f0;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 60px;
}

.footer-section h3,
.footer-section h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #000;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section ul li a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #000;
}

.footer-contact p {
    margin-bottom: 10px;
    color: #666;
}

.footer-bottom {
    position: relative;
    text-align: center;
    padding-top: 40px;
    border-top: 1px solid #f0f0f0;
}

.footer-background-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 120px;
    font-weight: 700;
    color: #f5f5f5;
    z-index: 0;
    pointer-events: none;
}

.footer-copyright {
    position: relative;
    z-index: 1;
    color: #999;
    font-size: 14px;
}

/* Адаптивность */
@media (max-width: 768px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 36px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .dark-images {
        grid-template-columns: 1fr;
    }
    
    .campus-grid {
        grid-template-columns: 1fr;
    }
    
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-background-text {
        font-size: 60px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero-text h1 {
        font-size: 28px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .about-text h2 {
        font-size: 28px;
    }
    
    .dark-section h2 {
        font-size: 28px;
    }
    
    .contact-info h2 {
        font-size: 28px;
    }
    
    .footer-background-text {
        font-size: 40px;
    }
}

@media (max-width: 320px) {
    .hero-text h1 {
        font-size: 24px;
    }
    
    .section-title {
        font-size: 24px;
    }
    
    .about-text h2 {
        font-size: 24px;
    }
    
    .dark-section h2 {
        font-size: 24px;
    }
    
    .contact-info h2 {
        font-size: 24px;
    }
}