.navigation-skeleton-overlay {
    position: fixed;
    inset: 0;
    z-index: 20000;
    display: none;
    overflow: hidden;
    background: #0a0a0f;
}

.navigation-skeleton-overlay.is-visible {
    display: block;
}

.navigation-skeleton-shell {
    width: min(100%, 1600px);
    min-height: 100vh;
    margin: 0 auto;
    padding: clamp(16px, 2vw, 28px);
    box-sizing: border-box;
}

.navigation-skeleton-topbar,
.navigation-skeleton-hero,
.navigation-skeleton-card,
.navigation-skeleton-line {
    position: relative;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.07);
}

.navigation-skeleton-topbar {
    height: 62px;
    border-radius: 14px;
    margin-bottom: clamp(14px, 2vw, 24px);
}

.navigation-skeleton-hero {
    min-height: clamp(220px, 34vh, 430px);
    border-radius: 18px;
    margin-bottom: clamp(16px, 2vw, 24px);
}

.navigation-skeleton-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(12px, 1.5vw, 20px);
}

.navigation-skeleton-card {
    min-height: 150px;
    border-radius: 16px;
    padding: 18px;
}

.navigation-skeleton-line {
    height: 12px;
    border-radius: 999px;
    margin-bottom: 12px;
}

.navigation-skeleton-line.is-short {
    width: 34%;
}

.navigation-skeleton-line.is-medium {
    width: 68%;
}

.navigation-skeleton-topbar::after,
.navigation-skeleton-hero::after,
.navigation-skeleton-card::after,
.navigation-skeleton-line::after {
    content: "";
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(255, 255, 255, 0.08) 42%,
        rgba(255, 255, 255, 0.18) 50%,
        rgba(255, 255, 255, 0.08) 58%,
        transparent 100%
    );
    animation: navigation-skeleton-shimmer 1.15s ease-in-out infinite;
}

body.navigation-skeleton-active {
    overflow: hidden !important;
}

@keyframes navigation-skeleton-shimmer {
    100% {
        transform: translateX(100%);
    }
}

@media (max-width: 991.98px) {
    .navigation-skeleton-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 575.98px) {
    .navigation-skeleton-shell {
        padding: 12px;
    }

    .navigation-skeleton-topbar {
        height: 54px;
        border-radius: 12px;
    }

    .navigation-skeleton-hero {
        min-height: 210px;
        border-radius: 14px;
    }

    .navigation-skeleton-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .navigation-skeleton-card {
        min-height: 112px;
        border-radius: 14px;
        padding: 14px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .navigation-skeleton-topbar::after,
    .navigation-skeleton-hero::after,
    .navigation-skeleton-card::after,
    .navigation-skeleton-line::after {
        animation: none;
    }
}