/* ==========================================================================
   Navbar — Simple navigation with | separators
   ========================================================================== */

.main-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    transition: var(--transition-color), backdrop-filter var(--transition-normal);
}

.main-nav.scrolled {
    background-color: rgba(247, 244, 235, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

html.dark-mode .main-nav.scrolled {
    background-color: rgba(0, 0, 0, 0.9);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
    display: flex;
    align-items: center;
    justify-content: center;
    height: var(--navbar-height);
    position: relative;
}

/* --- Nav Links --- */
.nav-links {
    display: flex;
    align-items: center;
    gap: 0;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links .menu-item {
    display: flex;
    align-items: center;
}

/* Separator | between items */
.nav-links .menu-item:not(:last-child)::after {
    content: '|';
    margin: 0 1rem;
    color: var(--color-text-muted);
    font-family: var(--font-label);
    font-size: 1rem;
    pointer-events: none;
}

.nav-links .menu-item a {
    font-family: var(--font-label);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text);
    text-decoration: none;
    padding: var(--space-xs) 0;
    transition: opacity var(--transition-fast);
    white-space: nowrap;
}

.nav-links .menu-item a:hover,
.nav-links .menu-item.current-menu-item a,
.nav-links .menu-item.current-menu-ancestor a {
    opacity: 0.6;
}

/* --- Theme Toggle --- */
.theme-toggle {
    position: absolute;
    right: var(--container-padding);
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background-color: var(--color-border);
    border: 1px solid var(--color-text-muted);
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
    cursor: pointer;
}

.theme-toggle:hover {
    background-color: var(--color-hover);
    border-color: var(--color-text);
}

.theme-toggle-icon {
    display: block;
    width: 20px;
    height: 20px;
    position: relative;
    text-align: center;
}

/* Sun icon (shown in bright mode — click to go dark) */
.theme-toggle-icon::before {
    content: '☀';
    font-size: 18px;
    line-height: 20px;
}

html.dark-mode .theme-toggle-icon::before {
    content: '☾';
}

/* --- Hamburger (mobile) --- */
.mobile-menu-toggle {
    display: none;
    position: absolute;
    right: var(--container-padding);
    width: 36px;
    height: 36px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    cursor: pointer;
    z-index: 200;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 22px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition-normal), opacity var(--transition-normal);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

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

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

.mobile-menu-toggle[aria-expanded="true"] .hamburger::before {
    top: 0;
    transform: rotate(45deg);
}

.mobile-menu-toggle[aria-expanded="true"] .hamburger::after {
    top: 0;
    transform: rotate(-45deg);
}

/* --- Mobile Menu Overlay --- */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 150;
    background-color: var(--color-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    transition: var(--transition-color);
}

.mobile-menu-overlay.open {
    display: flex;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-lg);
    list-style: none;
    padding: 0;
    margin: 0;
}

.mobile-nav-links .menu-item a {
    font-family: var(--font-display);
    font-size: clamp(2rem, 6vw, 3.5rem);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text);
    text-decoration: none;
}

.mobile-nav-links .menu-item a:hover {
    opacity: 0.6;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .nav-links,
    .nav-container > .theme-toggle {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .nav-container {
        justify-content: center;
    }
}