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

:root {
    /* Темная тема (по умолчанию) */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-card: #2d2d2d;
    --bg-sidebar: #151515;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #888888;
    --accent-primary: #0044ff;
    --accent-secondary: #4c00ff;
    --accent-blue: #00e1ff;
    --gradient-green: linear-gradient(135deg, #00f7ff, #008cff, #001aff);
    --gradient-light-green: linear-gradient(135deg, #8400ff, #0004ff, #00ccff);
    --gradient-blue-green: linear-gradient(135deg, #1100ff, #00e1ff, #00a2ff);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --shadow-hover: 0 8px 30px rgba(0, 255, 136, 0.2);
    --nav-bg: rgba(26, 26, 26, 0.95);
    --border-color: rgba(255, 255, 255, 0.1);
    --mobile-nav-height: 60px;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

/* Навигационная панель */
.navbar {
    background: var(--nav-bg);
    backdrop-filter: blur(20px);
    padding: 0 5%;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.logo {
    color: var(--text-primary);
    font-size: 1.4rem;
    font-weight: bold;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1001;
}

.logo-text {
    background: var(--gradient-green);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 20px;
    align-items: center;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    padding: 10px 15px;
    border-radius: 8px;
    transition: all 0.3s ease;
    position: relative;
    font-size: 0.95rem;
    display: block;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    background: rgba(0, 38, 255, 0.1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent-primary);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
}

/* Контролы навигации */
.nav-controls {
    display: flex;
    align-items: center;
    gap: 15px;
    z-index: 1001;
}

/* Гамбургер меню */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: 8px;
    background: none;
    border: none;
    z-index: 1001;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: 0.3s;
    border-radius: 2px;
    transform-origin: center;
}

/* Основной контент */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px 5%;
}

/* Герой секция */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 80px 0;
    min-height: 80vh;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: 24px;
    line-height: 1.2;
}

.hero-content p {
    font-size: clamp(1.1rem, 2vw, 1.3rem);
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    position: relative;
}

.floating-card {
    background: var(--bg-card);
    padding: 30px 20px;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    animation: float 3s ease-in-out infinite;
}

.floating-card:nth-child(2) {
    animation-delay: 1.5s;
}

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

.card-icon {
    font-size: 3rem;
    margin-bottom: 16px;
}

/* Кнопки */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    font-size: 1rem;
    gap: 8px;
    min-height: 50px;
}

.btn-primary {
    background: var(--gradient-green);
    color: #000;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(4, 0, 255, 0.3);
}

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

.btn-secondary:hover {
    border-color: var(--accent-primary);
    background: rgba(17, 0, 255, 0.1);
}

/* Секции */
.section {
    margin-bottom: 100px;
}

.section h2 {
    font-size: clamp(2rem, 4vw, 3rem);
    margin-bottom: 60px;
    text-align: center;
    background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

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

/* Карточки */
.card {
    background: var(--bg-card);
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(4, 0, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

.card:hover::before {
    left: 100%;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.card h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
    font-size: 1.4rem;
}

.card p {
    color: var(--text-secondary);
    line-height: 1.6;
}

.card-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.feature-card {
    background: var(--bg-card);
    padding: 30px 20px;
    border-radius: 12px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

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

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

/* Форма */
.form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form input,
.form textarea {
    padding: 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form input:focus,
.form textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(0, 255, 136, 0.1);
}

.form input::placeholder,
.form textarea::placeholder {
    color: var(--text-muted);
}

/* Контакты */
.contact-info {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 16px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
    color: var(--text-secondary);
}

.contact-icon {
    font-size: 1.2rem;
}

/* Футер */
footer {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    padding: 60px 5% 30px;
    margin-top: 100px;
    border-top: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    color: var(--text-primary);
    margin-bottom: 20px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

/* Градиентный текст */
.green-gradient {
    background: var(--gradient-green);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: bold;
}

.light-green-gradient {
    background: var(--gradient-light-green);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: bold;
}

.blue-green-gradient {
    background: var(--gradient-blue-green);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: bold;
}

/* Анимации */
@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

/* ==================== */
/* МОБИЛЬНАЯ ОПТИМИЗАЦИЯ */
/* ==================== */

@media (max-width: 1024px) {
    .nav-container {
        padding: 0 20px;
    }
    
    .nav-menu {
        gap: 15px;
    }
    
    .nav-link {
        padding: 8px 12px;
        font-size: 0.9rem;
    }
    
    .hero {
        gap: 40px;
        padding: 60px 0;
    }
    
    .container {
        padding: 20px 4%;
    }
}

@media (max-width: 768px) {
    /* Навигация для мобильных */
    .nav-container {
        height: var(--mobile-nav-height);
        padding: 0 15px;
    }
    
    .nav-menu {
        position: fixed;
        top: var(--mobile-nav-height);
        left: -100%;
        width: 100%;
        height: calc(100vh - var(--mobile-nav-height));
        background: var(--bg-secondary);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 40px 20px;
        gap: 0;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        overflow-y: auto;
        z-index: 999;
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        width: 100%;
        text-align: center;
        margin: 0;
    }
    
    .nav-link {
        display: block;
        padding: 20px;
        border-radius: 0;
        border-bottom: 1px solid var(--border-color);
        font-size: 1.1rem;
        width: 100%;
    }
    
    .nav-link::after {
        display: none;
    }
    
    .nav-link:hover,
    .nav-link.active {
        background: rgba(0, 255, 136, 0.15);
        color: var(--accent-primary);
    }
    
    /* Контролы навигации */
    .nav-controls {
        gap: 10px;
    }
    
    .hamburger {
        display: flex;
        position: relative;
    }
    
    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .hamburger.active span:nth-child(2) {
        opacity: 0;
        transform: translateX(-10px);
    }
    
    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    /* Герой секция */
    .hero {
        grid-template-columns: 1fr;
        gap: 30px;
        padding: 40px 0;
        text-align: center;
        min-height: auto;
    }
    
    .hero-content h1 {
        font-size: 2.2rem;
        margin-bottom: 20px;
    }
    
    .hero-content p {
        font-size: 1.1rem;
        margin-bottom: 30px;
    }
    
    .hero-visual {
        grid-template-columns: 1fr;
        gap: 15px;
        order: -1;
    }
    
    .floating-card {
        padding: 25px 15px;
        animation: none;
    }
    
    .floating-card:hover {
        transform: translateY(-5px);
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .btn {
        width: 100%;
        max-width: 280px;
        padding: 12px 24px;
    }
    
    /* Секции */
    .section {
        margin-bottom: 60px;
    }
    
    .section h2 {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    /* Сетки */
    .grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    /* Карточки */
    .card {
        padding: 25px 20px;
    }
    
    .card:hover {
        transform: translateY(-5px);
    }
    
    .feature-card {
        padding: 25px 15px;
    }
    
    /* Футер */
    footer {
        padding: 40px 4% 20px;
        margin-top: 60px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .footer-section {
        margin-bottom: 20px;
    }
    
    .container {
        padding: 15px 4%;
    }
    
    /* Предотвращение прокрутки при открытом меню */
    body.menu-open {
        overflow: hidden;
        position: fixed;
        width: 100%;
        height: 100%;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 10px;
    }
    
    .logo-text {
        font-size: 1.2rem;
    }
    
    .nav-menu {
        padding: 30px 15px;
    }
    
    .nav-link {
        padding: 18px 15px;
        font-size: 1rem;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section h2 {
        font-size: 1.7rem;
    }
    
    .card {
        padding: 20px 15px;
    }
    
    .feature-card {
        padding: 20px 15px;
    }
    
    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        min-height: 44px;
    }
    
    .container {
        padding: 10px 3%;
    }
    
    .hamburger {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Оптимизация касаний для мобильных */
@media (hover: none) and (pointer: coarse) {
    .card:hover {
        transform: none;
    }
    
    .btn:hover {
        transform: none;
    }
    
    .nav-link:hover::after {
        width: 0;
    }
    
    .floating-card:hover {
        transform: none;
    }
    
    /* Улучшение touch targets */
    .nav-link {
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
    
    .btn {
        min-height: 44px;
    }
    
    .hamburger {
        min-height: 44px;
        min-width: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }
}

/* Улучшение производительности */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Плавные анимации для меню */
.nav-menu {
    transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.hamburger span {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Улучшение читаемости на мобильных */
@media (max-width: 768px) {
    body {
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
    }
    
    .hero-content h1,
    .section h2 {
        word-wrap: break-word;
        overflow-wrap: break-word;
    }
}

/* Поддержка очень высоких экранов */
@media (min-width: 769px) and (max-height: 700px) {
    .hero {
        min-height: 90vh;
    }
}