/* =====================================================
   Modern Header Styles - 2024
   ===================================================== */

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
}

.header-main {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-4) 0;
}

/* Logo */
.header .logo a {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: var(--text-lg);
    color: var(--primary-color);
    transition: var(--transition-fast);
}

.header .logo a:hover {
    color: var(--primary-dark);
}

.header .logo img {
    border-radius: var(--rounded-lg);
    box-shadow: var(--shadow-light);
    transition: var(--transition-fast);
}

.header .logo a:hover img {
    transform: scale(1.05);
}

/* Navigation Menu */
.header .nav-menu {
    display: flex;
    align-items: center;
}

.header .menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-8);
    list-style: none;
    margin: 0;
    padding: 0;
}

.header .menu-item a {
    display: block;
    padding: var(--spacing-3) var(--spacing-4);
    font-weight: 600;
    font-size: var(--text-base);
    color: var(--text-dark);
    border-radius: var(--rounded-lg);
    transition: var(--transition-fast);
    position: relative;
}

.header .menu-item a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transform: translateX(-50%);
    transition: var(--transition-fast);
}

.header .menu-item a:hover {
    color: var(--primary-color);
    background: rgba(30, 64, 175, 0.05);
}

.header .menu-item a:hover::before {
    width: 80%;
}

/* Mobile Menu Toggle */
.header .open-nav-menu {
    display: none;
    width: 44px;
    height: 44px;
    border: none;
    background: none;
    cursor: pointer;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    border-radius: var(--rounded-lg);
    transition: var(--transition-fast);
}

.header .open-nav-menu:hover {
    background: rgba(30, 64, 175, 0.1);
}

.header .open-nav-menu span,
.header .open-nav-menu span::before,
.header .open-nav-menu span::after {
    display: block;
    width: 24px;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: var(--transition-normal);
}

.header .open-nav-menu span {
    position: relative;
}

.header .open-nav-menu span::before,
.header .open-nav-menu span::after {
    content: '';
    position: absolute;
    left: 0;
}

.header .open-nav-menu span::before {
    top: -8px;
}

.header .open-nav-menu span::after {
    bottom: -8px;
}

/* Close Menu Button */
.header .close-nav-menu {
    display: none;
    width: 48px;
    height: 48px;
    border: none;
    background: rgba(255, 255, 255, 0.15);
    color: white;
    cursor: pointer;
    align-items: center;
    justify-content: center;
    border-radius: var(--rounded-xl);
    transition: var(--transition-fast);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.header .close-nav-menu::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all var(--transition-fast);
}

.header .close-nav-menu:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
}

.header .close-nav-menu:hover::before {
    width: 100%;
    height: 100%;
}

.header .close-nav-menu:active {
    transform: scale(0.95);
}

/* Menu Overlay */
.header .menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-normal);
    z-index: 999;
}

.header .menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .header .open-nav-menu {
        display: flex;
    }

    .header .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 320px;
        height: 100vh;
        background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
        transition: var(--transition-slow);
        overflow-y: auto;
        z-index: 1000;
        display: flex;
        flex-direction: column;
    }

    .header .nav-menu.open {
        right: 0;
    }

    /* Mobile Menu Header */
    .mobile-menu-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--spacing-6);
        background: rgba(255, 255, 255, 0.1);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.15);
        position: relative;
        min-height: 72px;
    }

    .mobile-menu-header::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: linear-gradient(45deg, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.05));
        pointer-events: none;
    }

    .mobile-menu-title {
        color: white;
        font-size: var(--text-xl);
        font-weight: 700;
        margin: 0;
        text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        letter-spacing: 0.5px;
        flex: 1;
        padding-right: var(--spacing-4);
    }

    .header .close-nav-menu {
        display: flex;
        position: relative;
        flex-shrink: 0;
    }

    .header .menu {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        padding: var(--spacing-8) var(--spacing-6);
        flex: 1;
    }

    .header .menu-item {
        width: 100%;
    }

    .header .menu-item a {
        display: block;
        padding: var(--spacing-4) var(--spacing-6);
        color: rgba(255, 255, 255, 0.9);
        border-radius: var(--rounded-xl);
        margin-bottom: var(--spacing-3);
        font-size: var(--text-lg);
        font-weight: 500;
        transition: all var(--transition-fast);
        border: 1px solid transparent;
        position: relative;
        overflow: hidden;
    }

    .header .menu-item a::before {
        content: '';
        position: absolute;
        top: 0;
        left: -100%;
        width: 100%;
        height: 100%;
        background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
        transition: var(--transition-normal);
    }

    .header .menu-item a:hover::before {
        left: 100%;
    }

    .header .menu-item a:hover {
        background: rgba(255, 255, 255, 0.15);
        color: white;
        transform: translateX(var(--spacing-2));
        border-color: rgba(255, 255, 255, 0.2);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }

    /* Hamburger Animation */
    .header .nav-menu.open ~ .header-main .open-nav-menu span {
        background: transparent;
    }

    .header .nav-menu.open ~ .header-main .open-nav-menu span::before {
        top: 0;
        transform: rotate(45deg);
    }

    .header .nav-menu.open ~ .header-main .open-nav-menu span::after {
        bottom: 0;
        transform: rotate(-45deg);
    }
}

@media (max-width: 768px) {
    .header .nav-menu {
        width: 280px;
    }

    .mobile-menu-header {
        padding: var(--spacing-5);
        min-height: 68px;
    }

    .mobile-menu-title {
        font-size: var(--text-lg);
        padding-right: var(--spacing-3);
    }

    .header .close-nav-menu {
        width: 44px;
        height: 44px;
    }

    .header .menu {
        padding: var(--spacing-6) var(--spacing-4);
    }

    .header .menu-item a {
        padding: var(--spacing-3) var(--spacing-4);
        font-size: var(--text-base);
    }
}

@media (max-width: 480px) {
    .header .nav-menu {
        width: 100%;
        right: -100%;
    }

    .mobile-menu-header {
        padding: var(--spacing-4);
        min-height: 64px;
    }

    .mobile-menu-title {
        font-size: var(--text-base);
        padding-right: var(--spacing-2);
        font-weight: 600;
    }

    .header .close-nav-menu {
        width: 40px;
        height: 40px;
    }

    .header .menu {
        padding: var(--spacing-4);
    }

    .header-main {
        padding: var(--spacing-3) 0;
    }

    .header .logo img {
        width: 32px;
        height: 32px;
    }
}

/* Scroll Effects */
.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-medium);
}

/* Focus Styles for Accessibility */
.header .menu-item a:focus,
.header .open-nav-menu:focus,
.header .close-nav-menu:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Hide scrollbar on mobile menu */
.header .nav-menu::-webkit-scrollbar {
    width: 0;
    background: transparent;
}

/* Animation for mobile menu items */
@media (max-width: 1024px) {
    .header .menu-item {
        opacity: 0;
        transform: translateX(30px);
        animation: slideInFromRight 0.3s ease-out forwards;
    }

    .header .menu-item:nth-child(1) { animation-delay: 0.1s; }
    .header .menu-item:nth-child(2) { animation-delay: 0.2s; }
    .header .menu-item:nth-child(3) { animation-delay: 0.3s; }
    .header .menu-item:nth-child(4) { animation-delay: 0.4s; }
    .header .menu-item:nth-child(5) { animation-delay: 0.5s; }
}

@keyframes slideInFromRight {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* Prevent body scroll when menu is open */
body.menu-open {
    overflow: hidden;
}