/* ============================================================================
   Navigation
   ============================================================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--header-height);
    background: rgba(13, 13, 20, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: all var(--transition-base);
}

.nav--scrolled {
    background: rgba(13, 13, 20, 0.95);
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-md);
}

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

.nav__logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-heading);
    font-size: var(--text-xl);
    font-weight: 700;
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.nav__logo:hover {
    color: var(--color-amber);
}

.nav__logo-icon {
    font-size: var(--text-2xl);
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav__link {
    position: relative;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    text-decoration: none;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-amber);
    border-radius: var(--radius-full);
    transition: width var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
    color: var(--color-amber);
}

.nav__link:hover::after,
.nav__link--active::after {
    width: 100%;
}

.nav__cta {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    background: var(--gradient-amber);
    color: var(--color-text-inverse);
    font-weight: 600;
    font-size: var(--text-sm);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-glow);
}

.nav__cta:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow-strong);
    color: var(--color-text-inverse);
}

/* Mobile hamburger */
.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-sm);
    cursor: pointer;
    z-index: 1001;
}

.nav__toggle-bar {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--transition-base);
}

.nav__toggle--open .nav__toggle-bar:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav__toggle--open .nav__toggle-bar:nth-child(2) {
    opacity: 0;
}

.nav__toggle--open .nav__toggle-bar:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

@media (max-width: 768px) {
    .nav__toggle {
        display: flex;
    }

    .nav__links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        justify-content: center;
        gap: var(--space-xl);
        background: var(--color-bg-secondary);
        border-left: 1px solid var(--color-border);
        padding: var(--space-3xl);
        transition: right var(--transition-slow);
    }

    .nav__links--open {
        right: 0;
    }

    .nav__link {
        font-size: var(--text-lg);
    }

    .nav__overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.6);
        z-index: 999;
    }

    .nav__overlay--visible {
        display: block;
    }
}