/* ============================================================
   NAVBAR STYLES — Nexus AI
   Sticky glassmorphism navbar with mobile drawer
   ============================================================ */

/* ---- Navbar ---- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-nav);
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    transition: all var(--transition-base);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(5, 8, 17, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(108, 99, 255, 0.15);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
    height: 70px;
}

.navbar__container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-6);
}

/* ---- Logo ---- */
.navbar__logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    flex-shrink: 0;
    position: relative;
    z-index: 2;
}

.navbar__logo-img {
    height: 100px;
    width: auto;
    border-radius: 8px;
    transition: transform var(--transition-base);
}

.navbar__logo:hover .navbar__logo-img {
    transform: scale(1.05);
}

.navbar__logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.3;
    gap: 1px;
}

.navbar__logo-brand {
    font-family: var(--font-heading);
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    letter-spacing: -0.03em;
    line-height: 1;
}

.navbar__logo-tagline {
    font-size: 0.68rem;
    color: var(--color-text-muted);
    font-weight: var(--font-normal);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    opacity: 0.75;
}

/* ---- Nav Menu ---- */
.navbar__nav {
    flex: 1;
    display: flex;
    justify-content: center;
}

.navbar__menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    list-style: none;
    margin: 0;
    padding: 0;
}

.navbar__menu li {
    position: relative;
}

.navbar__menu > li > a {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    position: relative;
    white-space: nowrap;
}

.navbar__menu > li > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 50%;
    transform: translateX(50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.navbar__menu > li > a:hover,
.navbar__menu > li.current-menu-item > a,
.navbar__menu > li.current-page-ancestor > a {
    color: var(--color-text-primary);
}

.navbar__menu > li > a:hover::after,
.navbar__menu > li.current-menu-item > a::after,
.navbar__menu > li.current-page-ancestor > a::after {
    width: 60%;
}

.nav-arrow {
    font-size: 0.6rem;
    transition: transform var(--transition-base);
}

.navbar__menu > li:hover .nav-arrow {
    transform: rotate(180deg);
}

/* ---- Dropdown ---- */
.navbar__menu .sub-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    padding: var(--space-2);
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: all var(--transition-base);
    z-index: 100;
    border-radius: var(--radius-lg) !important;
}

.navbar__menu > li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.navbar__menu .sub-menu li a {
    display: block;
    padding: var(--space-2) var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.navbar__menu .sub-menu li a:hover {
    color: var(--color-text-primary);
    background: rgba(108, 99, 255, 0.1);
    padding-right: var(--space-5);
}

/* ---- Actions ---- */
.navbar__actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-shrink: 0;
}

.navbar__cta {
    position: relative;
    z-index: 2;
}

/* ---- Mobile Toggle ---- */
.navbar__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    padding: 10px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 2;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.navbar__toggle:hover {
    background: rgba(255, 255, 255, 0.05);
}

.navbar__toggle-bar {
    width: 100%;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
    transform-origin: center;
}

.navbar__toggle.active .navbar__toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar__toggle.active .navbar__toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}

.navbar__toggle.active .navbar__toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ---- Scroll Progress ---- */
.navbar__progress {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: transparent;
}

.navbar__progress-bar {
    height: 100%;
    width: 0%;
    background: var(--gradient-primary);
    transition: width 0.1s linear;
    border-radius: 0 var(--radius-full) var(--radius-full) 0;
    box-shadow: 0 0 10px rgba(108, 99, 255, 0.5);
}

/* ============================================================
   MOBILE DRAWER
   ============================================================ */
.mobile-drawer {
    position: fixed;
    inset: 0;
    z-index: calc(var(--z-nav) + 10);
    pointer-events: none;
    visibility: hidden;
}

.mobile-drawer.open {
    pointer-events: all;
    visibility: visible;
}

.mobile-drawer__overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.mobile-drawer.open .mobile-drawer__overlay {
    opacity: 1;
}

.mobile-drawer__content {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(85vw, 380px);
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform var(--transition-base) cubic-bezier(0.22, 1, 0.36, 1);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding: var(--space-6);
}

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

.mobile-drawer__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-6);
}

.mobile-drawer__close {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    font-size: var(--text-xl);
    transition: all var(--transition-fast);
}

.mobile-drawer__close:hover {
    background: rgba(255, 45, 120, 0.1);
    color: var(--color-neon-accent);
}

.mobile-drawer__nav {
    flex: 1;
}

.mobile-drawer__menu {
    list-style: none;
    margin: 0;
    padding: 0;
}

.mobile-drawer__menu li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-drawer__menu li a {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-2);
    color: var(--color-text-secondary);
    font-size: var(--text-base);
    font-weight: var(--font-medium);
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
}

.mobile-drawer__menu li a:hover,
.mobile-drawer__menu li.current-menu-item a {
    color: var(--color-neon-primary);
    background: rgba(108, 99, 255, 0.05);
    padding-right: var(--space-4);
}

.mobile-drawer__menu li a i {
    width: 20px;
    text-align: center;
    font-size: var(--text-sm);
    color: var(--color-neon-primary);
}

.mobile-drawer__footer {
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    margin-top: var(--space-6);
}

.mobile-drawer__social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-4);
    margin-top: var(--space-6);
}

.mobile-drawer__social a {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
    transition: all var(--transition-base);
}

.mobile-drawer__social a:hover {
    background: rgba(108, 99, 255, 0.15);
    color: var(--color-neon-primary);
    transform: translateY(-2px);
}

/* ---- Back to Top ---- */
.back-to-top {
    position: fixed;
    bottom: var(--space-8);
    left: var(--space-8);
    width: 46px;
    height: 46px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: 50%;
    color: var(--color-neon-primary);
    font-size: var(--text-sm);
    z-index: var(--z-raised);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    cursor: pointer;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--color-neon-primary);
    color: white;
    border-color: var(--color-neon-primary);
    box-shadow: var(--shadow-neon-primary);
    transform: translateY(-3px);
}

.back-to-top__progress {
    position: absolute;
    inset: -2px;
    transform: rotate(-90deg);
}

.back-to-top__progress circle {
    fill: none;
    stroke: var(--color-neon-primary);
    stroke-width: 2;
    stroke-linecap: round;
}

/* ---- Custom Cursor ---- */
.custom-cursor {
    display: none;
}

@media (hover: hover) and (pointer: fine) {
    .custom-cursor {
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        z-index: var(--z-top);
        pointer-events: none;
    }

    .custom-cursor__dot {
        width: 6px;
        height: 6px;
        background: var(--color-neon-primary);
        border-radius: 50%;
        position: absolute;
        transform: translate(-50%, -50%);
        transition: width 0.15s, height 0.15s, background 0.15s;
    }

    .custom-cursor__outline {
        width: 36px;
        height: 36px;
        border: 1px solid rgba(108, 99, 255, 0.4);
        border-radius: 50%;
        position: absolute;
        transform: translate(-50%, -50%);
        transition: width 0.3s ease, height 0.3s ease, border-color 0.3s ease;
    }

    .custom-cursor.hovering .custom-cursor__dot {
        width: 10px;
        height: 10px;
        background: var(--color-neon-secondary);
    }

    .custom-cursor.hovering .custom-cursor__outline {
        width: 50px;
        height: 50px;
        border-color: rgba(0, 212, 255, 0.4);
    }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
    .navbar__nav {
        display: none;
    }
    .navbar__toggle {
        display: flex;
    }
    .navbar__cta {
        display: none;
    }
}

@media (max-width: 480px) {
    .mobile-drawer__content {
        width: 100vw;
    }
}