/* ================================================================
   header-navigation.css  —  UPC editorial nav + mobile drawer
   ================================================================ */

/* ── Nav bar ─────────────────────────────────────────────────── */
.upc-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    z-index: 500;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background: color-mix(in srgb,var(--bg-primary) 92%,transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid color-mix(in srgb,var(--accent-primary) 7%,transparent);
    transition: top 0.3s ease;
}

/* Logo */
.upc-nav-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    text-decoration: none;
}
.upc-nav-logo-img {
    height: 36px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    transition: filter 0.3s, transform 0.3s;
}
.upc-nav-logo:hover .upc-nav-logo-img {
    filter: drop-shadow(0 0 12px color-mix(in srgb,var(--accent-primary) 35%,transparent));
    transform: scale(1.04);
}

/* Desktop links */
.upc-nav-links {
    align-items: center;
    gap: 1.75rem;
}

.upc-nav-link {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: color 0.2s;
    white-space: nowrap;
}
.upc-nav-link::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-primary);
    transition: width 0.3s ease;
}
.upc-nav-link:hover,
.upc-nav-link.active {
    color: var(--accent-primary);
}
.upc-nav-link:hover::after,
.upc-nav-link.active::after {
    width: 100%;
}

/* Desktop right side */
.upc-nav-actions { align-items: center; gap: 0.75rem; }

/* CTA button */
.upc-nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1.2rem;
    background: var(--accent-primary);
    color: var(--text-on-gradient) !important;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow 0.35s ease;
}
.upc-nav-cta:hover {
    transform: translateY(-2px) scale(1.04);
    box-shadow: 0 0 24px color-mix(in srgb,var(--accent-primary) 45%,transparent);
}

/* ── Burger button ───────────────────────────────────────────── */
.upc-nav-burger {
    display: flex;          /* explicit — not relying on Tailwind .flex */
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: 1.5px solid var(--border-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
    flex-shrink: 0;
}
.upc-nav-burger:hover,
.upc-nav-burger:focus-visible {
    border-color: color-mix(in srgb,var(--accent-primary) 50%,transparent);
    background: color-mix(in srgb,var(--accent-primary) 5%,transparent);
    outline: none;
}
.upc-nav-burger span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all 0.25s;
}

/* ── Mobile drawer ───────────────────────────────────────────── */
.upc-mobile-menu {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 499;
    background: color-mix(in srgb,var(--bg-primary) 98%,transparent);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid color-mix(in srgb,var(--accent-primary) 8%,transparent);
    padding: 0.5rem 0 1rem;
    /* Ambient glow */
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}
.upc-mobile-menu.hidden { display: none !important; }

.upc-mob-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.9rem 1.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    transition: color 0.2s, background 0.2s;
}
.upc-mob-link i {
    width: 1.1rem;
    text-align: center;
    font-size: 0.8rem;
    color: color-mix(in srgb,var(--accent-primary) 40%,transparent);
    transition: color 0.2s;
    flex-shrink: 0;
}
.upc-mob-link:hover {
    color: var(--accent-primary);
    background: color-mix(in srgb,var(--accent-primary) 4%,transparent);
}
.upc-mob-link:hover i { color: var(--accent-primary); }
.upc-mob-link.active {
    color: var(--accent-primary);
}
.upc-mob-link.active i { color: var(--accent-primary); }

.upc-mob-divider {
    height: 1px;
    background: var(--border-primary);
    margin: 0.5rem 1.5rem;
}

.upc-mob-cta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0.5rem 1.5rem 0;
    padding: 0.9rem 1.25rem;
    background: color-mix(in srgb,var(--accent-primary) 8%,transparent);
    border: 1px solid color-mix(in srgb,var(--accent-primary) 25%,transparent);
    border-radius: 10px;
    color: var(--accent-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    transition: background 0.2s, border-color 0.2s;
}
.upc-mob-cta i { font-size: 0.8rem; }
.upc-mob-cta:hover {
    background: color-mix(in srgb,var(--accent-primary) 14%,transparent);
    border-color: color-mix(in srgb,var(--accent-primary) 40%,transparent);
}

/* ── Scroll-aware: hide on down, show on up ──────────────────── */
.upc-nav.nav-hidden {
    transform: translateY(-100%);
    transition: transform 0.3s ease, top 0.3s ease;
}
.upc-nav.nav-visible {
    transform: translateY(0);
}

/* ── Tournament alert offset ─────────────────────────────────── */
.upc-nav.nav-alert-offset {
    top: 3.5rem;
}

/* ── back-compat: active state JS uses .nav-link ─────────────── */
.nav-link.active { color: var(--accent-primary) !important; }
.nav-link.active::after { width: 100% !important; }
.mobile-nav-link.active { color: var(--accent-primary) !important; }