/* ===== Основные стили ===== */
:root {
    --primary-color: #00c6fe;
    --primary-dark: #0099cc;
    --secondary-color: #1a1a2e;
    --dark-bg: #0f0f1a;
    --light-bg: #ffffff;
    --text-dark: #1a1a2e;
    --text-light: #ffffff;
    --text-gray: #6c757d;
    --accent-gradient: linear-gradient(135deg, #00c6fe 0%, #0099cc 100%);
    --card-shadow: 0 10px 40px rgba(0, 198, 254, 0.1);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--light-bg);
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

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

/* ===== Шапка ===== */
.header {
    background: var(--light-bg);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
}

.logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--primary-color);
    margin-left: 10px;
}

.nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav a {
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
}

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

.nav a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
}

.nav a:hover::after {
    width: 100%;
}

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

.header-phone {
    font-weight: 600;
    color: var(--text-dark);
}

.header-phone:hover {
    color: var(--primary-color);
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--accent-gradient);
    color: var(--text-light);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0, 198, 254, 0.3);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--text-light);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Hero секция ===== */
.hero {
    padding: 150px 0 80px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.hero-content {
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    background: rgba(0, 198, 254, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
}

.hero h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 20px;
    color: var(--secondary-color);
}

.hero h1 span {
    color: var(--primary-color);
}

.hero p {
    font-size: 18px;
    color: var(--text-gray);
    margin-bottom: 30px;
    line-height: 1.7;
}

.hero-btns {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

/* ===== Секции ===== */
.section {
    padding: 80px 0;
}

.section-dark {
    background: var(--secondary-color);
    color: var(--text-light);
}

.section-gray {
    background: #f8f9fa;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.section-dark .section-title h2 {
    color: var(--text-light);
}

.section-title p {
    font-size: 18px;
    color: var(--text-gray);
}

/* ===== Карточки курсов ===== */
.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 30px;
}

.course-card {
    background: var(--light-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 50px rgba(0, 198, 254, 0.15);
}

.course-image {
    position: relative;
    height: 200px;
    background: linear-gradient(135deg, var(--secondary-color), #2a2a4a);
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-image img {
    max-height: 100%;
    object-fit: cover;
}

.course-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 5px 15px;
    background: var(--primary-color);
    color: var(--text-light);
    border-radius: 15px;
    font-size: 12px;
    font-weight: 600;
}

.course-content {
    padding: 25px;
}

.course-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.course-description {
    color: var(--text-gray);
    font-size: 14px;
    margin-bottom: 15px;
}

.course-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
    font-size: 13px;
    color: var(--text-gray);
}

.course-meta span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.course-price {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.price {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
}

.price-old {
    text-decoration: line-through;
    color: var(--text-gray);
    font-size: 14px;
    margin-left: 10px;
}

.price-free {
    color: #28a745;
}

/* ===== Услуги ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--light-bg);
    border-radius: 20px;
    padding: 35px;
    text-align: center;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: rgba(0, 198, 254, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    color: var(--primary-color);
}

.service-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.service-description {
    font-size: 14px;
    color: var(--text-gray);
}

/* ===== Новости ===== */
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.news-card {
    background: var(--light-bg);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--card-shadow);
    transition: var(--transition);
}

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

.news-image {
    height: 200px;
    background: linear-gradient(135deg, var(--secondary-color), #2a2a4a);
}

.news-content {
    padding: 25px;
}

.news-date {
    font-size: 13px;
    color: var(--primary-color);
    margin-bottom: 10px;
}

.news-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--secondary-color);
}

.news-excerpt {
    font-size: 14px;
    color: var(--text-gray);
    margin-bottom: 15px;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 28px;
    margin-bottom: 20px;
}

.contact-info p {
    margin-bottom: 30px;
    color: rgba(255, 255, 255, 0.7);
}

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

.contact-list li {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-list i {
    width: 40px;
    height: 40px;
    background: rgba(0, 198, 254, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 30px;
}

.social-links a {
    width: 45px;
    height: 45px;
    background: rgba(0, 198, 254, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--text-light);
}

/* ===== Форма ===== */
.form-group {
    margin-bottom: 20px;
}

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

.form-control {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-light);
    font-size: 16px;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(255, 255, 255, 0.1);
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

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

select.form-control {
    cursor: pointer;
}

/* ===== Футер ===== */
.footer {
    background: var(--dark-bg);
    color: var(--text-light);
    padding: 60px 0 30px;
}

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

.footer-logo img {
    height: 40px;
    margin-bottom: 20px;
}

.footer-description {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    margin-bottom: 20px;
}

.footer h4 {
    font-size: 16px;
    margin-bottom: 20px;
    color: var(--text-light);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

.footer-links a:hover {
    color: var(--primary-color);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-copy {
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

/* ===== Адаптивность ===== */
@media (max-width: 992px) {
    .nav {
        display: none;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .section {
        padding: 60px 0;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
    
    .courses-grid,
    .services-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ===== Анимации ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.6s ease forwards;
}

/* ===== Мобильное меню ===== */
.mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--secondary-color);
    z-index: 999;
    padding: 80px 20px 20px;
}

.mobile-menu.active {
    display: block;
}

.mobile-menu a {
    display: block;
    padding: 15px 0;
    font-size: 18px;
    color: var(--text-light);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-menu a:hover {
    color: var(--primary-color);
}

/* ===== Уведомления ===== */
.alert {
    padding: 15px 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    color: #28a745;
    border: 1px solid rgba(40, 167, 69, 0.2);
}

.alert-error {
    background: rgba(220, 53, 69, 0.1);
    color: #dc3545;
    border: 1px solid rgba(220, 53, 69, 0.2);
}

/* ===== Preloader ===== */
.preloader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--light-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: var(--transition);
}

.preloader.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(0, 198, 254, 0.2);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== Партнеры ===== */
.partners-slider {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.partner-logo {
    opacity: 0.6;
    transition: var(--transition);
    max-height: 60px;
}

.partner-logo:hover {
    opacity: 1;
}

/* ===== CTA секция ===== */
.cta-section {
    background: var(--accent-gradient);
    padding: 60px 0;
    text-align: center;
}

.cta-section h2 {
    font-size: 32px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 30px;
    font-size: 18px;
}

.cta-section .btn {
    background: var(--text-light);
    color: var(--primary-color);
}

.cta-section .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}