/* ============================================
   TRADEVISION - PROFESSIONAL NAVBAR
   Modern Glassmorphism - Dark Mode Default
   Sticky Scroll Behavior - 60 FPS Optimized
   ============================================ */

/* ============================================
   1. NAVBAR BASE STYLES
   ============================================ */

.navbar-professional {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: transform var(--transition-base),
                background var(--transition-base),
                box-shadow var(--transition-base);
    will-change: transform;
}

.navbar-professional.scrolled {
    background: rgba(10, 10, 10, 0.95);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
    border-bottom-color: rgba(255, 255, 255, 0.12);
}

.navbar-professional.hidden {
    transform: translateY(-100%);
}

/* Light Mode Override */
:root[data-theme="light"] .navbar-professional {
    background: rgba(255, 255, 255, 0.85);
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

:root[data-theme="light"] .navbar-professional.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.1);
}

/* ============================================
   2. NAVBAR CONTAINER
   ============================================ */

.navbar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 70px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* ============================================
   3. NAVBAR BRAND/LOGO
   ============================================ */

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.navbar-brand:hover {
    color: var(--color-primary);
    transform: scale(1.02);
}

.navbar-brand-logo {
    width: 32px;
    height: 32px;
}

/* ============================================
   4. NAVBAR NAVIGATION
   ============================================ */

.navbar-nav {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0.5rem;
    align-items: center;
}

.navbar-nav-item {
    position: relative;
}

.navbar-nav-link {
    display: block;
    padding: 0.625rem 1.25rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
}

.navbar-nav-link:hover {
    color: var(--color-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

:root[data-theme="light"] .navbar-nav-link:hover {
    background: rgba(0, 0, 0, 0.03);
}

/* Active Link Indicator */
.navbar-nav-link.active {
    color: var(--color-text-primary);
    font-weight: 600;
}

.navbar-nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
}

/* ============================================
   5. THEME TOGGLE BUTTON
   ============================================ */

.theme-toggle {
    position: relative;
    width: 44px;
    height: 44px;
    border: none;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    margin-left: 1rem;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: scale(1.05);
}

:root[data-theme="light"] .theme-toggle {
    background: rgba(0, 0, 0, 0.05);
}

:root[data-theme="light"] .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.1);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    stroke: var(--color-text-primary);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: all var(--transition-base);
}

.theme-toggle .icon-sun {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
    position: absolute;
}

.theme-toggle .icon-moon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

:root[data-theme="light"] .theme-toggle .icon-sun {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

:root[data-theme="light"] .theme-toggle .icon-moon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

/* ============================================
   6. MOBILE MENU TOGGLE
   ============================================ */

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    position: relative;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
    position: absolute;
}

.mobile-menu-toggle span:nth-child(1) {
    top: 14px;
}

.mobile-menu-toggle span:nth-child(2) {
    top: 21px;
}

.mobile-menu-toggle span:nth-child(3) {
    top: 28px;
}

/* Mobile Menu Toggle Active State (X Animation) */
.mobile-menu-toggle.active span:nth-child(1) {
    top: 21px;
    transform: rotate(45deg);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
    transform: translateX(-10px);
}

.mobile-menu-toggle.active span:nth-child(3) {
    top: 21px;
    transform: rotate(-45deg);
}

/* ============================================
   7. RESPONSIVE MOBILE MENU
   ============================================ */

@media (max-width: 768px) {
    .navbar-container {
        height: 60px;
        padding: 0 1rem;
    }

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

    .navbar-nav {
        position: fixed;
        top: 60px;
        right: -100%;
        width: 280px;
        height: calc(100vh - 60px);
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem 1rem;
        gap: 0;
        border-left: 1px solid rgba(255, 255, 255, 0.08);
        transition: right var(--transition-medium);
        overflow-y: auto;
    }

    :root[data-theme="light"] .navbar-nav {
        background: rgba(255, 255, 255, 0.98);
        border-left-color: rgba(0, 0, 0, 0.08);
    }

    .navbar-nav.active {
        right: 0;
    }

    .navbar-nav-item {
        width: 100%;
    }

    .navbar-nav-link {
        display: block;
        padding: 1rem 1.25rem;
        border-radius: var(--radius-md);
        margin-bottom: 0.5rem;
    }

    .navbar-nav-link.active::after {
        bottom: 50%;
        left: 8px;
        transform: translateY(50%);
        width: 3px;
        height: 20px;
    }

    .theme-toggle {
        margin-left: 0;
        margin-top: 1rem;
        width: 100%;
        justify-content: flex-start;
        padding-left: 1.25rem;
    }
}

/* ============================================
   8. NAVBAR SPACING (for fixed navbar)
   ============================================ */

.navbar-spacer {
    height: 70px;
}

@media (max-width: 768px) {
    .navbar-spacer {
        height: 60px;
    }
}

/* ============================================
   9. NAVBAR DROPDOWN (Future Use)
   ============================================ */

.navbar-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 200px;
    background: rgba(10, 10, 10, 0.95);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    margin-top: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-xl);
}

:root[data-theme="light"] .navbar-dropdown {
    background: rgba(255, 255, 255, 0.95);
    border-color: rgba(0, 0, 0, 0.08);
}

.navbar-nav-item:hover .navbar-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.navbar-dropdown-item {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--color-text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    font-size: 0.9rem;
}

.navbar-dropdown-item:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-primary);
}

:root[data-theme="light"] .navbar-dropdown-item:hover {
    background: rgba(0, 0, 0, 0.03);
}

/* ============================================
   10. ACCESSIBILITY
   ============================================ */

.navbar-professional *:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
}

/* Skip to main content link */
.skip-to-main {
    position: absolute;
    top: -100px;
    left: 0;
    background: var(--color-primary);
    color: var(--color-background);
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border-radius: 0 0 var(--radius-md) 0;
    transition: top var(--transition-fast);
    z-index: 9999;
}

.skip-to-main:focus {
    top: 0;
}