/* ============================================
   Navigation — Sticky Glassmorphism Nav
   ============================================ */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: var(--z-nav);
    transform: translateY(-100%);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.navbar.visible {
    transform: translateY(0);
    box-shadow: 0 2px 20px rgba(0, 80, 120, 0.08);
}

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

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: opacity var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-logo-img {
    width: 36px;
    height: 36px;
    object-fit: contain;
}

.nav-logo-text {
    font-size: var(--text-body);
    font-weight: var(--weight-bold);
    color: var(--color-primary);
    letter-spacing: -0.01em;
}

/* Nav Links */
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav-link {
    font-size: 0.9375rem;
    font-weight: var(--weight-medium);
    color: var(--color-primary);
    padding: var(--space-xs) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-secondary);
    transition: width var(--transition-fast), left var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-secondary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
    left: 0;
}

/* CTA Button */
.nav-cta {
    padding: 0.6rem 1.5rem;
    background: var(--color-secondary);
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-cta:hover {
    background: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

/* Hamburger */
.nav-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-xs);
    z-index: calc(var(--z-mobile-menu) + 1);
}

.nav-hamburger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: all var(--transition-fast);
    transform-origin: center;
}

.nav-hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

.nav-hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    max-width: 400px;
    height: 100vh;
    background: var(--color-white);
    padding: calc(var(--nav-height) + var(--space-lg)) var(--space-lg) var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    transition: right var(--transition-normal);
    z-index: var(--z-mobile-menu);
    box-shadow: -10px 0 40px rgba(0, 0, 0, 0.1);
}

.mobile-menu.open {
    right: 0;
}

.mobile-link {
    font-size: var(--text-h3);
    font-weight: var(--weight-semibold);
    color: var(--color-primary);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--color-light-gray);
    transition: color var(--transition-fast);
}

.mobile-link:hover {
    color: var(--color-secondary);
}

.mobile-cta {
    margin-top: var(--space-md);
    padding: var(--space-sm);
    background: var(--color-secondary);
    color: var(--color-white);
    font-size: var(--text-body);
    font-weight: var(--weight-semibold);
    border-radius: var(--radius-sm);
    text-align: center;
    transition: all var(--transition-fast);
}

.mobile-cta:hover {
    background: var(--color-primary);
}

/* Mobile Overlay */
.mobile-menu::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 22, 40, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: -1;
}

.mobile-menu.open::before {
    opacity: 1;
    visibility: visible;
}

/* Responsive */
@media (max-width: 1024px) {
    .nav-links {
        display: none;
    }
    
    .nav-cta {
        display: none;
    }
    
    .nav-hamburger {
        display: flex;
    }
}

@media (max-width: 480px) {
    .nav-logo-text {
        display: none;
    }
    
    .mobile-menu {
        max-width: 100%;
    }
}