/* ===========================================
   Navigation - Desktop + Mobile Hamburger
   =========================================== */

.site-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-base);
}

.site-nav.scrolled {
    background: rgba(10, 10, 15, 0.95);
}

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

.nav-logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.nav-logo img {
    height: 56px;
    margin: -16px 0;
}

/* Desktop links */
.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-base);
    position: relative;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--apex-primary);
    border-radius: 1px;
}

/* Contact button in nav */
.nav-links .btn-nav-contact {
    padding: 0.5rem 1.25rem;
    background: linear-gradient(135deg, var(--apex-primary) 0%, var(--apex-primary-light) 100%);
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    transition: all var(--transition-base);
}

.nav-links .btn-nav-contact:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.nav-links .btn-nav-contact.active::after {
    display: none;
}

/* Hamburger button */
.nav-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    z-index: 1002;
}

.nav-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-base);
    transform-origin: center;
}

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

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

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

/* Mobile overlay */
.nav-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 999;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.nav-overlay.open {
    display: flex;
    opacity: 1;
}

.nav-overlay a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1.5rem;
    font-weight: 600;
    transition: color var(--transition-base);
}

.nav-overlay a:hover,
.nav-overlay a.active {
    color: var(--text-primary);
}

.nav-overlay .btn-nav-contact {
    padding: 0.75rem 2rem;
    background: linear-gradient(135deg, var(--apex-primary) 0%, var(--apex-primary-light) 100%);
    color: white;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 1.2rem;
}