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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

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

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

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

/* Переключатель языков */
.lang-switch {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.lang-item {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    border: 1px solid transparent;
    border-radius: 0.5rem;
    padding: 0.25rem 0.5rem;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s ease;
}

.lang-item:hover {
    background-color: #f5f5f5;
    border-color: #ddd;
}

.lang-item[aria-current="true"] {
    border-color: #5ec1ff;
    background-color: #5ec1ff1a;
}

.lang-item img {
    display: block;
    width: 22px;
    height: 16px;
    border-radius: 2px;
}

.lang-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: #666;
}

/* Шапка */
.header {
    background-color: #fff;
    border-bottom: 1px solid #e5e5e5;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.logo img {
    max-height: 50px;
    width: auto;
}

/* Главная навигация */
.main-nav {
    border-top: 1px solid #e5e5e5;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 2rem;
    padding: 1rem 0;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    padding: 0.5rem 0;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #5ec1ff;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -1rem;
    left: 0;
    right: 0;
    height: 2px;
    background-