:root {
    --primary-color: #2C3E50;
    --secondary-color: #2196F3;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --white: #ffffff;
    --footer-link-hover: #3498db;
}

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

body {
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header Styles */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

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

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

/* Мобильное меню */
.menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* Основной контент */
main {
    margin-top: 80px; /* Отступ для фиксированной шапки */
}

/* Hero Section */
.hero {
    padding: 4rem 0;
}

.hero .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: var(--text-color);
}

.hero-image {
    flex: 1;
    text-align: center;
}

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

/* Features Section */
.features {
    padding: 4rem 0;
    background-color: var(--light-gray);
}

.features h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: var(--primary-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.feature-card {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.feature-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* Download Section */
.download {
    padding: 4rem 0;
    text-align: center;
}

.download h2 {
    margin-bottom: 2rem;
    color: var(--primary-color);
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 1rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.app-store {
    background-color: #000;
    color: var(--white);
}

.app-store:hover {
    background-color: #333;
}

/* Footer */
.footer {
    background-color: var(--text-color);
    color: var(--white);
    padding: 3rem 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 2rem;
}

.footer-info h3 {
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    transition: opacity 0.3s;
}

.footer-links a:hover {
    opacity: 0.8;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav {
        padding: 1rem;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 1rem;
        flex-direction: column;
        gap: 1rem;
        box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        z-index: 1000;
    }

    .nav-links.active {
        display: flex;
    }

    .hero .container {
        flex-direction: column;
        gap: 2rem;
    }

    .hero-content {
        order: 2;
        text-align: center;
    }

    .hero-image {
        order: 1;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .features-grid {
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .feature-card {
        width: 100%;
        padding: 1.5rem;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        align-items: center;
    }
}

/* Медиа-запросы для планшетов */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 2rem;
    }

    .hero .container {
        gap: 2rem;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

.language-switcher {
    display: flex;
    gap: 1rem;
    margin-left: 2rem;
}

.language-switcher a {
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

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

.language-switcher a.active {
    color: var(--primary-color);
    font-weight: 500;
}

.language-switch {
    font-size: 1.2rem;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.language-switch:hover {
    opacity: 1;
}

.language-switch.active {
    opacity: 1;
}