/* ═══════════════════════════════════════════════════════════════════════
   Navigation
   ═══════════════════════════════════════════════════════════════════════ */

.navbar {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    align-items: center;
    z-index: var(--z-fixed);
    background: rgba(29, 29, 29, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: background-color var(--transition), border-color var(--transition);
    will-change: background-color;
}

/* On hero pages the navbar starts transparent and solidifies on scroll */
.page-with-hero .navbar {
    background: transparent;
    border-bottom-color: transparent;
}
.page-with-hero .navbar.scrolled {
    background: rgba(29, 29, 29, 0.92);
    border-bottom-color: rgba(255, 255, 255, 0.06);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.navbar-brand {
    font-family: 'Poppins', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    text-decoration: none;
    white-space: nowrap;
}
.navbar-brand .x-accent { font-weight: 800; }

.navbar-nav {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 0.25rem;
}
.nav-item { position: relative; }
.nav-link {
    display: block;
    padding: 0.5rem 1rem;
    font-family: 'Poppins', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: color var(--transition-fast);
}
.nav-link:hover, .nav-link.active { color: #ffffff; }
.nav-link::after {
    content: '';
    display: block;
    width: 0;
    height: 1px;
    background: var(--brand-red);
    margin-top: 4px;
    transition: width var(--transition);
}
.nav-link:hover::after, .nav-link.active::after { width: 100%; }
.nav-link-cta {
    margin-left: 0.5rem;
    padding: 0.55rem 1.25rem;
    border-radius: var(--radius-pill);
    background: var(--brand-red);
    color: #ffffff;
}
.nav-link-cta:hover { background: var(--brand-red-deep); }
.nav-link-cta::after { display: none; }

.navbar-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: var(--radius-sm);
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}
.navbar-toggle:focus-visible { outline: 2px solid var(--brand-red); outline-offset: 2px; }

.hamburger {
    width: 22px;
    height: 2px;
    background: #ffffff;
    position: relative;
    border-radius: 2px;
    transition: background var(--transition);
}
.hamburger::before, .hamburger::after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 2px;
    background: #ffffff;
    border-radius: 2px;
    transition: transform var(--transition), top var(--transition), bottom var(--transition);
}
.hamburger::before { top: -7px; }
.hamburger::after { bottom: -7px; }
.navbar-toggle.active .hamburger { background: transparent; }
.navbar-toggle.active .hamburger::before { top: 0; transform: rotate(45deg); }
.navbar-toggle.active .hamburger::after { bottom: 0; transform: rotate(-45deg); }

/* Scroll progress sliver */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 2px;
    background: var(--brand-red);
    z-index: calc(var(--z-fixed) + 1);
    width: 0;
    pointer-events: none;
    transition: width 0.1s linear;
}

/* Mobile */
@media (max-width: 992px) {
    .navbar-toggle { display: flex; }
    .navbar-collapse {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        height: 0;
        background: rgba(29, 29, 29, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        overflow: hidden;
        transition: height var(--transition);
    }
    .navbar-collapse.show {
        height: calc(100vh - var(--header-height));
        height: calc(100dvh - var(--header-height));
        overflow-y: auto;
    }
    .navbar-nav {
        flex-direction: column;
        align-items: stretch;
        padding: 1.5rem;
        gap: 0.25rem;
    }
    .nav-link { padding: 0.85rem 0.5rem; font-size: 1.05rem; }
    .nav-link-cta { margin: 0.5rem 0.5rem 0; align-self: flex-start; }
}