/**
 * Header and navigation styles
 */

#header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background-color: var(--header-bg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 9999;
    transition: background-color var(--transition-base);
}

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

/* Mobile layout: Hamburger LEFT | Logo CENTER | Switch RIGHT */
@media (max-width: 767px) {
    .header-container {
        display: flex;
        flex-wrap: nowrap;
        align-items: center;
        justify-content: space-between;
    }

    .menu-toggle {
        order: 1;
        flex-shrink: 0;
    }

    .logo {
        order: 2;
        flex: 1;
        text-align: center;
    }

    .header-container > .theme-switch {
        order: 3;
        flex-shrink: 0;
    }

    /* Mobile nav - full screen overlay */
    .main-nav {
        position: fixed !important;
        top: var(--header-height) !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100% !important;
        height: calc(100vh - var(--header-height)) !important;
        background-color: #0d0d0d !important;
        padding: 2rem !important;
        overflow-y: auto !important;
        z-index: 9998 !important;
        transform: translateX(100%);
    }

    /* When menu is open */
    .main-nav.active {
        transform: translateX(0) !important;
    }

    .main-nav .nav-list {
        display: flex !important;
        flex-direction: column !important;
        gap: 1rem !important;
        list-style: none !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .main-nav .nav-list li {
        display: block !important;
    }

    .main-nav .nav-list a {
        display: block !important;
        color: #c4a052 !important;
        font-size: 1.2rem !important;
        padding: 0.75rem 0 !important;
        text-transform: uppercase;
        letter-spacing: 0.1em;
        border-bottom: 1px solid rgba(255,255,255,0.1) !important;
    }

    .header-container > .admin-toggle {
        display: none !important;
    }
}

/* Logo */
.logo {
    font-family: var(--font-primary);
    font-size: var(--font-size-xl);
    color: var(--color-text-primary);
    letter-spacing: 0.05em;
    transition: color var(--transition-fast);
}

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

.logo-text {
    font-weight: 400;
}

/* Mobile menu toggle */
.menu-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--color-text-primary);
}

.hamburger {
    position: relative;
    width: 24px;
    height: 2px;
    background-color: currentColor;
    transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: currentColor;
    transition: transform var(--transition-fast);
}

.hamburger::before {
    top: -7px;
}

.hamburger::after {
    bottom: -7px;
}

/* Menu open state */
.menu-toggle[aria-expanded="true"] .hamburger {
    background-color: transparent;
}

.menu-toggle[aria-expanded="true"] .hamburger::before {
    transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .hamburger::after {
    transform: translateY(-7px) rotate(-45deg);
}

/* Navigation */
.main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-bg-primary);
    padding: var(--spacing-xl);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    overflow-y: auto;
    z-index: 999;
}

.main-nav.active {
    transform: translateX(0);
}

.nav-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.nav-list a {
    display: block;
    padding: var(--spacing-sm) 0;
    font-family: var(--font-secondary);
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-bottom: 1px solid transparent;
    transition: all var(--transition-fast);
}

.nav-list a:hover,
.nav-list a.active {
    color: var(--color-accent);
    border-bottom-color: var(--color-accent);
}

.nav-contact {
    color: var(--color-accent) !important;
}

/* Admin toggle button */
.admin-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--color-text-muted);
    opacity: 0.5;
    transition: all var(--transition-fast);
}

.admin-toggle:hover {
    color: var(--color-accent);
    opacity: 1;
}

/* Desktop styles */
@media (min-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-xl);
    }

    .menu-toggle {
        display: none;
    }

    .main-nav {
        position: static;
        transform: none;
        background: none;
        padding: 0;
        overflow: visible;
    }

    .nav-list {
        flex-direction: row;
        gap: var(--spacing-xl);
    }

    .nav-list a {
        font-size: var(--font-size-sm);
        padding: var(--spacing-xs) 0;
    }
}

/* Theme switch positioning */
@media (min-width: 768px) {
    .header-container .theme-switch {
        margin-left: var(--spacing-md);
    }
}

/* Admin modal */
#admin-modal .modal-content {
    text-align: center;
}

#admin-modal h2 {
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-xl);
}

#admin-modal .form-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

/* Visually hidden but accessible to screen readers and password managers */
.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}