/* ============================================
   NAV.CSS — Sticky Navbar & Dropdown Styles
   ============================================ */

/* — Main Navigation — */
#main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 40px;
    height: var(--nav-height);
    background: var(--nav-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition);
}

#main-nav.scrolled {
    height: var(--nav-height-scrolled);
    background: var(--nav-bg-scrolled);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.1);
}

/* — Logo — */
.nav-logo {
    font-family: var(--font-display);
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-text) !important;
    letter-spacing: -0.5px;
    transition: all var(--transition);
}

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

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

/* — Navigation Links — */
.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-links>li {
    position: relative;
}

.nav-links>li.has-dropdown {
    padding-bottom: 12px;
    margin-bottom: -12px;
}

.nav-links>li>a {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    position: relative;
}

/* Animated underline */
.nav-links>li>a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition);
}

.nav-links>li>a:hover {
    color: var(--color-text);
}

.nav-links>li>a:hover::after {
    transform: scaleX(1);
}

/* Active state */
.nav-links>li>a.active {
    color: var(--color-accent);
}

.nav-links>li>a.active::after {
    transform: scaleX(1);
}

/* — Dropdown Arrow — */
.dropdown-arrow {
    font-size: 0.65rem;
    transition: transform var(--transition);
    display: inline-block;
}

.has-dropdown:hover .dropdown-arrow,
.has-dropdown.open .dropdown-arrow {
    transform: rotate(180deg);
}

/* — Dropdown Menu — */
.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    min-width: 200px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 8px;
    opacity: 0;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: var(--z-dropdown);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.has-dropdown:hover .dropdown,
.has-dropdown.open .dropdown {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}

.dropdown li a {
    display: block;
    padding: 10px 16px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.dropdown li a:hover {
    background: var(--color-accent-dim);
    color: var(--color-accent);
}

.dropdown li a.active {
    color: var(--color-accent);
    background: var(--color-accent-dim);
}

/* — Hamburger Button — */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: calc(var(--z-mobile-menu) + 1);
}

.hamburger-line {
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.hamburger-line:nth-child(1) {
    margin-bottom: 5px;
}

.hamburger-line:nth-child(2) {
    margin-bottom: 5px;
}

/* Hamburger active state (X) */
.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

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

/* — Mobile Menu Overlay — */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: var(--z-mobile-menu);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
}

.mobile-menu-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

/* — Mobile Drawer — */
.mobile-drawer {
    display: none;
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    max-width: 85vw;
    height: 100vh;
    background: var(--color-surface);
    border-left: 1px solid var(--color-border);
    z-index: calc(var(--z-mobile-menu) + 1);
    transform: translateX(100%);
    transition: transform var(--transition);
    padding: 28px;
    padding-top: 24px;
    overflow-y: auto;
}

.mobile-drawer.active {
    transform: translateX(0);
}

/* — Drawer Close Button — */
.drawer-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--color-text-secondary);
    font-size: 1.2rem;
    line-height: 1;
    transition: all var(--transition);
    margin-left: auto;
    margin-bottom: 20px;
    padding: 0;
}

.drawer-close:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-dim);
}

.mobile-drawer .mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.mobile-drawer .mobile-nav-links a {
    display: block;
    padding: 14px 16px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.mobile-drawer .mobile-nav-links a:hover,
.mobile-drawer .mobile-nav-links a.active {
    color: var(--color-accent);
    background: var(--color-accent-dim);
}

.mobile-drawer .mobile-dropdown-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.mobile-drawer .mobile-dropdown-label:hover {
    color: var(--color-text);
}

.mobile-drawer .mobile-dropdown-items {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.mobile-drawer .mobile-dropdown-items.open {
    max-height: 300px;
}

.mobile-drawer .mobile-dropdown-items a {
    padding: 10px 16px 10px 32px;
    font-size: 0.9rem;
}

.mobile-drawer .mobile-socials {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.mobile-drawer .mobile-socials a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--color-muted);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.mobile-drawer .mobile-socials a:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--color-accent-dim);
    transform: translateY(-1px);
}

.mobile-drawer .mobile-socials svg {
    width: 18px;
    height: 18px;
    fill: currentColor;
}
/* — Nav Social Icons — */
.nav-socials {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: 12px;
}

.nav-socials a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    color: var(--color-muted);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-socials a:hover {
    color: var(--color-accent);
    background: var(--color-accent-dim);
    transform: translateY(-1px);
}

.nav-socials svg {
    width: 16px;
    height: 16px;
    fill: currentColor;
}

/* — Theme Toggle Button — */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 1.1rem;
    line-height: 1;
    transition: all var(--transition);
    margin-left: 8px;
    padding: 0;
    color: var(--color-text);
}

.theme-toggle:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-1px);
}