/* ============================================
   NAV — навигация
   css/nav.css
============================================ */

nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 99999;
    background: rgba(10, 10, 10, 0.4);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    transition: background 0.3s ease;
    /* Принудительно на свой GPU-слой — iOS fix */
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    isolation: isolate;
}

.nav-reveal {
    opacity: 0;
}

.nav-reveal.revealed {
    animation: navFlicker 0.8s ease forwards;
}

@keyframes navFlicker {
    0%   { opacity: 0; }
    10%  { opacity: 1; }
    20%  { opacity: 0.2; }
    30%  { opacity: 1; }
    40%  { opacity: 0.4; }
    50%  { opacity: 1; }
    60%  { opacity: 0.6; }
    70%  { opacity: 1; }
    80%  { opacity: 0.8; }
    90%  { opacity: 1; }
    100% { opacity: 1; }
}

.nav-left .logo {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-weight: 900;
    font-size: 1.5rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: #fff;
}

.nav-center {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: rgba(255,255,255,0.4);
}

.nav-info, .nav-divider {
    font-family: 'Terminus', 'Courier New', monospace;
}

.nav-info.open  { color: #bafe00; }
.nav-info.closed { color: #ff0407; }

.nav-divider { color: rgba(10, 0, 255,0.6); font-size: 0.4rem; }

.nav-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
}

.nav-link {
    color: rgba(255,255,255,0.5);
    transition: color 0.3s;
}
.nav-link:hover, .nav-link.active { color: #fff; }
.nav-separator { color: rgba(255,255,255,0.15); }

/* Бургер */
.nav-burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: none;
    padding: 4px;
    z-index: 10002;
    position: relative;
}
.nav-burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: #fff;
    transition: transform 0.3s ease, opacity 0.3s ease;
    transform-origin: center;
}
.nav-burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-burger.open span:nth-child(2) { transform: scaleX(0); }
.nav-burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Мобильный попап */
.nav-mobile-popup {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(5,5,5,0.97);
    z-index: 10001;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 4rem 2rem;
    gap: 1.5rem;
}
.nav-mobile-popup.open { display: flex; }

.nav-mobile-info {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-family: 'Terminus', monospace;
    font-size: 0.6rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.3);
    margin-bottom: 1rem;
}

.mobile-nav-link {
    font-size: clamp(1.8rem, 7vw, 3rem);
    font-weight: 900;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    transition: color 0.2s;
}
.mobile-nav-link.active, .mobile-nav-link:hover { color: #fff; }


/* =============================================
   АНИМАЦИЯ ССЫЛОК ПОПАПА
   ============================================= */
@keyframes mobileNavIn {
    from { opacity: 0; transform: translateX(-30px); }
    to   { opacity: 1; transform: translateX(0); }
}

/* =============================================
   АДАПТИВ — ПЛАНШЕТ
   ============================================= */
@media (max-width: 1024px) {
    .nav-center { display: none; }
    .nav-right  { font-size: 0.65rem; gap: 0.3rem; }
}

/* =============================================
   АДАПТИВ — МОБИЛЬ
   ============================================= */
@media (max-width: 768px) {
    nav { padding: 0.85rem 1.2rem; }
    .nav-center, .nav-right { display: none; }
    .nav-burger { display: flex; }
}