/* Основной контейнер шапки */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition-fast);
}

.header.scrolled {
    background: rgba(10, 10, 10, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

/* Контейнер содержимого шапки */
.header-container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

/* Логотип */
.logo {
    flex-shrink: 0;
}

.logo-text {
    font-size: 24px;
    font-weight: 900;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: var(--text-shadow-glow);
    cursor: pointer;
    transition: var(--transition-fast);
}

.logo-text:hover {
    color: var(--primary-color);
}

/* Акцентная буква G */
.logo-accent {
    color: var(--accent-color);
    text-shadow: 0 0 10px var(--accent-color);
    animation: logoGlow 3s ease-in-out infinite;
}

/* Навигация */
.navigation {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    padding: 10px 0;
    transition: var(--transition-fast);
    position: relative;
}

.nav-link::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-fast);
    box-shadow: 0 0 10px var(--primary-color);
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
    text-shadow: var(--text-shadow-glow);
}

.nav-link:hover::before,
.nav-link.active::before {
    width: 100%;
}

.nav-link.active {
    color: var(--primary-color);
}

/* Кнопка мобильного меню */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    gap: 4px;
    transition: var(--transition-fast);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition-fast);
    transform-origin: center;
}

.mobile-menu-toggle:hover span {
    background: var(--primary-color);
    box-shadow: 0 0 10px var(--primary-color);
}

/* Состояние активного мобильного меню */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Анимации */
@keyframes logoGlow {
    0%, 100% {
        text-shadow: 0 0 10px var(--accent-color);
    }
    50% {
        text-shadow: 0 0 20px var(--accent-color), 0 0 30px var(--accent-color);
    }
}

/* Адаптивность */
@media (max-width: 768px) {
    .header-container {
        padding: 0 15px;
    }
    
    .logo-text {
        font-size: 20px;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: 40px 0;
        gap: 20px;
        transition: var(--transition-medium);
        border-top: 1px solid var(--border-color);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-link {
        font-size: var(--font-size-large);
        padding: 15px 0;
    }
    
}