astro_avtourist/frontend/src/components/layout/header/Header.astro

---
import Logo from './Logo.astro';
import LoginButton from './LoginButton.astro';
import Navbar from './Navbar.astro';
import MobileMenu from './MobileMenu.astro';
---

<header class="header-wrapper" id="header">
    <div class="header-progress-container">
        <div class="header-progress-bar" id="progress-bar"></div>
    </div>

    <div class="site-container header-container">
        <Logo />
        <Navbar />

        <div class="contact-block">
            <LoginButton />
            <button class="burger-btn" id="burger-btn" aria-label="Открыть меню">
                <span class="burger-line"></span>
                <span class="burger-line"></span>
                <span class="burger-line"></span>
            </button>
        </div>
    </div>
</header>

<MobileMenu />

<script>
    document.addEventListener('DOMContentLoaded', () => {
        const burgerBtn = document.getElementById('burger-btn');
        const mobileMenuOverlay = document.getElementById('mobile-menu-overlay');
        const mobileMenuClose = document.getElementById('mobile-menu-close');
        const mobileNavLinks = mobileMenuOverlay?.querySelectorAll('.mobile-nav-link');
        const progressBar = document.getElementById('progress-bar');
        const header = document.getElementById('header');

        // Обработка прогресса скролла
        function updateProgressBar() {
            if (!progressBar) return;

            // Получаем высоту документа и окна
            const scrollTop = window.scrollY || document.documentElement.scrollTop;
            const docHeight = document.documentElement.scrollHeight - document.documentElement.clientHeight;

            // Избегаем деления на ноль
            if (docHeight <= 0) {
                progressBar.style.width = '0%';
                return;
            }

            // Вычисляем процент прокрутки (0-100)
            const scrollPercent = (scrollTop / docHeight) * 100;

            // Ограничиваем значения от 0 до 100
            const clampedPercent = Math.min(100, Math.max(0, scrollPercent));

            // Применяем ширину
            progressBar.style.width = `${clampedPercent}%`;

            // Добавляем/убираем класс visible для дополнительных эффектов
            if (scrollTop > 5) {
                header?.classList.add('scrolled');
            } else {
                header?.classList.remove('scrolled');
            }
        }

        // Оптимизация через requestAnimationFrame
        let ticking = false;
        function handleScroll() {
            if (!ticking) {
                window.requestAnimationFrame(() => {
                    updateProgressBar();
                    ticking = false;
                });
                ticking = true;
            }
        }

        // Инициализация и слушатели
        updateProgressBar();
        window.addEventListener('scroll', handleScroll, { passive: true });
        window.addEventListener('resize', updateProgressBar);

        // Мобильное меню
        function openMenu() {
            mobileMenuOverlay?.classList.add('active');
            document.body.style.overflow = 'hidden';
            burgerBtn?.classList.add('active');
        }

        function closeMenu() {
            mobileMenuOverlay?.classList.remove('active');
            document.body.style.overflow = '';
            burgerBtn?.classList.remove('active');
        }

        burgerBtn?.addEventListener('click', openMenu);
        mobileMenuClose?.addEventListener('click', closeMenu);

        mobileMenuOverlay?.addEventListener('click', (e) => {
            if (e.target === mobileMenuOverlay) closeMenu();
        });

        mobileNavLinks?.forEach(link => {
            link.addEventListener('click', closeMenu);
        });

        document.addEventListener('keydown', (e) => {
            if (e.key === 'Escape' && mobileMenuOverlay?.classList.contains('active')) {
                closeMenu();
            }
        });
    });
</script>

<style>
    .header-wrapper {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        background-color: #d1d9e4;
        font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        z-index: 1000;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
        transition: background-color 0.3s ease, box-shadow 0.3s ease;
    }

    /* Контейнер прогресс-бара */
    .header-progress-container {
        position: absolute;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 3px;
        background: rgba(212, 175, 55, 0.1);
        overflow: hidden;
    }

    /* Сама линия прогресса */
    .header-progress-bar {
        height: 100%;
        width: 0%;
        background: linear-gradient(90deg, #d4af37 0%, #e8c547 50%, #d4af37 100%);
        background-size: 200% 100%;
        transition: width 0.1s linear;
        box-shadow: 0 0 10px rgba(212, 175, 55, 0.5);
        animation: shimmer 2s infinite linear;
    }

    /* Эффект мерцания градиента */
    @keyframes shimmer {
        0% { background-position: 200% 0; }
        100% { background-position: -200% 0; }
    }

    /* Состояние при скролле */
    .header-wrapper.scrolled {
        background-color: rgba(209, 217, 228, 0.95);
        backdrop-filter: blur(10px);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    }

    .header-container {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1.2rem 0;
        position: relative;
    }

    .contact-block {
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    /* Кнопка гамбургера */
    .burger-btn {
        display: none;
        flex-direction: column;
        justify-content: space-between;
        width: 30px;
        height: 21px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
        z-index: 1001;
        margin-left: 1rem;
    }

    .burger-line {
        width: 100%;
        height: 3px;
        background: linear-gradient(90deg, #1e3050 0%, #2a4266 100%);
        border-radius: 2px;
        transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        transform-origin: center;
    }

    .burger-btn.active .burger-line:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .burger-btn.active .burger-line:nth-child(2) {
        opacity: 0;
        transform: scaleX(0);
    }

    .burger-btn.active .burger-line:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    @media (max-width: 992px) {
        .burger-btn {
            display: flex;
        }

        .login-btn {
            display: none;
        }
    }

    @media (max-width: 576px) {
        .contact-block {
            flex-direction: column;
            align-items: flex-end;
            gap: 0.5rem;
        }

        .header-container {
            padding: 0 1rem;
        }
    }
</style>