.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: rgba(5, 8, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.site-header.scrolled {
    background: rgba(5, 8, 15, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4), 0 0 1px rgba(0, 180, 255, 0.1);
}

.header-container {
    max-width: var(--content-max);
    margin: 0 auto;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    gap: 20px;
}

.header-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
}

.header-logo-text {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-bright);
    letter-spacing: 1px;
    position: relative;
}

.header-logo-text::after {
    content: '';
    display: block;
    width: 100%;
    height: 3px;
    margin-top: 4px;
    background: linear-gradient(to right, #009246 33.33%, #ffffff 33.33%, #ffffff 66.66%, #ce2b37 66.66%);
    border-radius: 2px;
}

.header-logo-text span {
    color: var(--primary);
    text-shadow: 0 0 20px rgba(0, 180, 255, 0.4);
}

.header-nav {
    display: flex;
    align-items: center;
    gap: 6px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-bright);
    background: var(--primary-glow);
}

.nav-link i {
    font-size: 0.85em;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-header {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
    text-decoration: none;
    white-space: nowrap;
    font-family: var(--font-body);
}

.btn-header-primary {
    background: var(--primary);
    color: var(--bg-body);
    box-shadow: 0 0 16px rgba(0, 180, 255, 0.2);
}

.btn-header-primary:hover {
    background: var(--primary-light);
    box-shadow: 0 0 24px rgba(0, 180, 255, 0.35);
    color: var(--bg-body);
    transform: translateY(-1px);
}

.btn-header-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-header-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-glow);
}

.user-menu {
    position: relative;
}

.user-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 180px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    flex-direction: column;
    overflow: hidden;
    z-index: 1000;
    animation: slideDown 0.2s ease;
}

.user-dropdown.show {
    display: flex;
}

.user-dropdown a {
    padding: 10px 16px;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-weight: 500;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.user-dropdown a:last-child {
    border-bottom: none;
}

.user-dropdown a:hover {
    background: var(--primary-glow);
    color: var(--text-main);
    padding-left: 20px;
}

.user-dropdown a i {
    color: var(--primary);
    font-size: 0.9em;
    width: 16px;
    text-align: center;
}

.lang-switcher {
    display: flex;
    gap: 2px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.lang-btn {
    padding: 6px 10px;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--text-muted);
    background: transparent;
    text-decoration: none;
    transition: all var(--transition-fast);
    letter-spacing: 0.5px;
}

.lang-btn:hover {
    color: var(--text-main);
    background: var(--bg-elevated);
}

.lang-btn.active {
    color: var(--primary);
    background: var(--primary-glow);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.1rem;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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