/* Sticky Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    z-index: 1000;
    background: rgba(15, 18, 37, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    transition: background var(--transition-base), box-shadow var(--transition-base);
}

.nav--scrolled {
    background: rgba(15, 18, 37, 0.95);
    box-shadow: var(--shadow-md);
}

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

.nav__logo {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.nav__logo img {
    height: 52px;
    width: auto;
}

.nav__tagline {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    border-left: 1px solid var(--border-default);
    padding-left: var(--space-md);
    white-space: nowrap;
}

.nav__links {
    display: flex;
    align-items: center;
    gap: var(--space-2xl);
    list-style: none;
}

.nav__link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav__link--active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-brand);
    border-radius: 1px;
}

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

.nav__login {
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
}

.nav__login:hover {
    color: var(--text-primary);
}

/* Mobile menu toggle */
.nav__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
    color: var(--text-primary);
}

.nav__toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: currentColor;
    margin: 5px 0;
    transition: all var(--transition-base);
    border-radius: 2px;
}

/* Mobile nav open state */
.nav__toggle--open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav__toggle--open span:nth-child(2) {
    opacity: 0;
}
.nav__toggle--open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu panel */
.nav__mobile {
    display: none;
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    padding: var(--space-2xl);
    z-index: 999;
    flex-direction: column;
    gap: var(--space-lg);
}

.nav__mobile--open {
    display: flex;
}

.nav__mobile a {
    color: var(--text-primary);
    font-size: 1.25rem;
    font-weight: 500;
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--border-subtle);
}

.nav__mobile .btn {
    margin-top: var(--space-lg);
    text-align: center;
}

/* Spacer to push content below fixed nav */
.nav-spacer {
    height: var(--nav-height);
}