:root {
    --nav-pink: #f472b6;
    --nav-pink-hot: #ec4899;
    --nav-violet: #a78bfa;
    --nav-purple: #8b5cf6;
    --nav-indigo: #6366f1;
    --nav-indigo-deep: #4f46e5;
    --nav-surface: rgba(11, 14, 20, 0.96);
    --nav-menu-solid: rgba(10, 12, 20, 0.99);
    --nav-item-bg: rgba(18, 20, 30, 0.98);
    --nav-ease: cubic-bezier(0.16, 1, 0.3, 1);
    --nav-ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --nav-radius: 14px;
    --nav-chip-shadow: 0 4px 20px rgba(236, 72, 153, 0.35), 0 2px 8px rgba(0, 0, 0, 0.25);
    --nav-chip-shadow-hover: 0 8px 28px rgba(236, 72, 153, 0.45), 0 4px 12px rgba(0, 0, 0, 0.3);
    --nav-chip-shadow-open: 0 0 0 2px rgba(255, 255, 255, 0.45), 0 10px 32px rgba(236, 72, 153, 0.42), 0 2px 8px rgba(0, 0, 0, 0.2);
}

@media (prefers-reduced-motion: reduce) {
    .nav-chip,
    .sections-dropdown__menu,
    .sections-dropdown__item,
    .sections-dropdown__summary::after,
    a.nav-btn-login,
    button.nav-btn-login,
    .fu-nav-btn-secondary {
        transition-duration: 0.01ms !important;
    }

    .nav-chip:hover,
    a.nav-btn-login:hover,
    button.nav-btn-login:hover,
    .fu-nav-btn-secondary:hover {
        transform: none !important;
    }

    .sections-dropdown__item:hover {
        transform: none !important;
    }

    .sections-dropdown__details[open] .sections-dropdown__item {
        animation: none !important;
    }

    .sections-dropdown__details[open] .sections-dropdown__summary.nav-chip--video,
    .sections-dropdown__details[open] .sections-dropdown__summary.nav-chip--popular {
        animation: none !important;
        filter: none !important;
    }
}

.nav-chip {
    box-sizing: border-box;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    min-height: 44px;
    border-radius: var(--nav-radius);
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    color: #fff;
    letter-spacing: 0.02em;
    border: 1px solid rgba(255, 255, 255, 0.22);
    cursor: pointer;
    font-family: inherit;
    line-height: 1.2;
    box-sizing: border-box;
    transition: transform 0.22s var(--nav-ease), box-shadow 0.22s var(--nav-ease), border-color 0.22s var(--nav-ease), background 0.22s var(--nav-ease);
    -webkit-user-select: none;
    user-select: none;
}

.nav-chip svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.nav-chip--video {
    background: linear-gradient(135deg, var(--nav-pink-hot) 0%, var(--nav-violet) 52%, var(--nav-purple) 100%);
    box-shadow: var(--nav-chip-shadow);
}

.nav-chip--popular {
    background: linear-gradient(135deg, #f59e0b 0%, #f97316 48%, #ef4444 100%);
    box-shadow: 0 4px 20px rgba(245, 158, 11, 0.38), 0 2px 8px rgba(0, 0, 0, 0.22);
    border-color: rgba(255, 255, 255, 0.2);
}

.nav-chip:hover {
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.32);
}

.nav-chip--video:hover {
    box-shadow: var(--nav-chip-shadow-hover);
}

.nav-chip--popular:hover {
    box-shadow: 0 8px 26px rgba(245, 158, 11, 0.48), 0 4px 12px rgba(0, 0, 0, 0.28);
}

.nav-chip--popular.nav-chip--active {
    box-shadow:
        0 0 0 2px rgba(255, 255, 255, 0.4),
        0 8px 24px rgba(245, 158, 11, 0.4);
}

.sections-dropdown__details[open] .sections-dropdown__summary.nav-chip--video {
    transform: translateY(-1px);
    box-shadow: var(--nav-chip-shadow-open);
    border-color: rgba(255, 255, 255, 0.5);
    animation: fu-nav-chip-glow 2.4s ease-in-out infinite;
}

@keyframes fu-nav-chip-glow {
    0%,
    100% {
        box-shadow: var(--nav-chip-shadow-open);
        filter: brightness(1);
    }
    50% {
        box-shadow:
            0 0 0 2px rgba(255, 255, 255, 0.58),
            0 14px 40px rgba(236, 72, 153, 0.48),
            0 2px 10px rgba(0, 0, 0, 0.22);
        filter: brightness(1.05);
    }
}

.sections-dropdown__details[open] .sections-dropdown__summary.nav-chip--popular {
    transform: translateY(-1px);
    box-shadow:
        0 0 0 2px rgba(255, 255, 255, 0.42),
        0 10px 30px rgba(245, 158, 11, 0.45),
        0 2px 8px rgba(0, 0, 0, 0.22);
    border-color: rgba(255, 255, 255, 0.45);
    animation: fu-nav-chip-glow-popular 2.4s ease-in-out infinite;
}

@keyframes fu-nav-chip-glow-popular {
    0%,
    100% {
        box-shadow:
            0 0 0 2px rgba(255, 255, 255, 0.42),
            0 10px 30px rgba(245, 158, 11, 0.45),
            0 2px 8px rgba(0, 0, 0, 0.22);
        filter: brightness(1);
    }
    50% {
        box-shadow:
            0 0 0 2px rgba(255, 255, 255, 0.55),
            0 14px 36px rgba(245, 158, 11, 0.52),
            0 2px 10px rgba(0, 0, 0, 0.22);
        filter: brightness(1.04);
    }
}

.nav-chip.nav-chip--active:not(.sections-dropdown__summary) {
    box-shadow:
        0 0 0 2px rgba(255, 255, 255, 0.38),
        0 8px 22px rgba(0, 0, 0, 0.28);
}

.sections-dropdown {
    position: relative;
    display: inline-block;
    isolation: isolate;
}

.sections-dropdown__details {
    position: relative;
}

.sections-dropdown__details[open] {
    z-index: 10060;
}

.sections-dropdown__summary {
    list-style: none;
    user-select: none;
    position: relative;
    padding-right: 38px;
}

.sections-dropdown__summary::-webkit-details-marker {
    display: none;
}

.sections-dropdown__summary::marker {
    content: '';
}

.sections-dropdown__summary::after {
    content: '';
    position: absolute;
    right: 14px;
    top: 50%;
    width: 7px;
    height: 7px;
    border-right: 2px solid rgba(255, 255, 255, 0.92);
    border-bottom: 2px solid rgba(255, 255, 255, 0.92);
    transform: translateY(-65%) rotate(45deg);
    transition: transform 0.24s var(--nav-ease-out);
}

.sections-dropdown__details[open] .sections-dropdown__summary::after {
    transform: translateY(-20%) rotate(-135deg);
}

.sections-dropdown__menu {
    box-sizing: border-box;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    min-width: 248px;
    display: grid;
    gap: 4px;
    padding: 8px;
    border-radius: var(--nav-radius);
    border: 1px solid rgba(255, 255, 255, 0.14);
    background-color: var(--nav-menu-solid);
    background-image: linear-gradient(180deg, rgba(236, 72, 153, 0.14) 0%, transparent 38%);
    -webkit-backdrop-filter: blur(10px) saturate(150%);
    backdrop-filter: blur(10px) saturate(150%);
    box-shadow:
        0 24px 56px rgba(0, 0, 0, 0.58),
        0 0 0 1px rgba(99, 102, 241, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.06);
    z-index: 5000;
    opacity: 0;
    transform: translateY(-8px) scale(0.97);
    transform-origin: top center;
    pointer-events: none;
    transition: opacity 0.22s var(--nav-ease), transform 0.26s var(--nav-ease), box-shadow 0.22s var(--nav-ease);
}

.sections-dropdown__details[open] .sections-dropdown__menu {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

@keyframes fu-nav-row-in {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.sections-dropdown__details[open] .sections-dropdown__item {
    animation: fu-nav-row-in 0.38s var(--nav-ease) backwards;
}

.sections-dropdown__details[open] .sections-dropdown__item:nth-child(1) {
    animation-delay: 0.03s;
}

.sections-dropdown__details[open] .sections-dropdown__item:nth-child(2) {
    animation-delay: 0.08s;
}

.sections-dropdown__details[open] .sections-dropdown__item:nth-child(3) {
    animation-delay: 0.13s;
}

.sections-dropdown__details[open] .sections-dropdown__item:nth-child(4) {
    animation-delay: 0.18s;
}

.sections-dropdown__details[open] .sections-dropdown__item:nth-child(5) {
    animation-delay: 0.23s;
}

.sections-dropdown__item {
    box-sizing: border-box;
    display: flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
    padding: 11px 14px;
    border-radius: 11px;
    color: #e2e8f0;
    text-decoration: none;
    font-size: 14px;
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: 0.01em;
    background: var(--nav-item-bg);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04);
    transition: background 0.18s var(--nav-ease), color 0.18s var(--nav-ease), transform 0.18s var(--nav-ease), box-shadow 0.18s var(--nav-ease);
    -webkit-user-select: none;
    user-select: none;
}

.sections-dropdown__item:hover {
    background: rgba(99, 102, 241, 0.22);
    color: #fff;
    transform: translateX(4px);
}

.sections-dropdown__item:active {
    transform: translateX(2px) scale(0.99);
}

.sections-dropdown__item.is-active {
    background: linear-gradient(135deg, rgba(124, 58, 237, 0.55) 0%, rgba(79, 70, 229, 0.52) 55%, rgba(236, 72, 153, 0.28) 100%);
    color: #fff;
    box-shadow:
        inset 3px 0 0 rgba(244, 114, 182, 0.95),
        inset 0 1px 0 rgba(255, 255, 255, 0.12);
}

a.nav-btn-login,
button.nav-btn-login {
    -webkit-appearance: none;
    appearance: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    min-height: 44px;
    border-radius: var(--nav-radius);
    font-weight: 700;
    font-size: 14px;
    letter-spacing: 0.02em;
    text-decoration: none;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.18);
    font-family: inherit;
    line-height: 1.2;
    box-sizing: border-box;
    cursor: pointer;
    background: linear-gradient(135deg, var(--nav-indigo) 0%, var(--nav-purple) 55%, #7c3aed 100%);
    box-shadow: 0 4px 22px rgba(99, 102, 241, 0.42), 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.22s var(--nav-ease), box-shadow 0.22s var(--nav-ease), border-color 0.22s var(--nav-ease), filter 0.15s var(--nav-ease);
    -webkit-user-select: none;
    user-select: none;
}

a.nav-btn-login:hover,
button.nav-btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 32px rgba(99, 102, 241, 0.52), 0 4px 12px rgba(0, 0, 0, 0.25);
    border-color: rgba(255, 255, 255, 0.28);
}

a.nav-btn-login:active,
button.nav-btn-login:active {
    transform: translateY(0);
}

a.nav-btn-login svg,
button.nav-btn-login svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.fu-nav-btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 22px;
    min-height: 44px;
    border-radius: var(--nav-radius);
    font-weight: 700;
    font-size: 14px;
    text-decoration: none;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.18);
    box-sizing: border-box;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.95) 0%, rgba(139, 92, 246, 0.92) 50%, rgba(124, 58, 237, 0.95) 100%);
    box-shadow: 0 4px 22px rgba(99, 102, 241, 0.38), 0 2px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.22s var(--nav-ease), box-shadow 0.22s var(--nav-ease), border-color 0.22s var(--nav-ease);
    -webkit-user-select: none;
    user-select: none;
}

.fu-nav-btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.48), 0 4px 12px rgba(0, 0, 0, 0.22);
    border-color: rgba(255, 255, 255, 0.28);
}

.fu-feed-topbar .sections-dropdown {
    position: relative;
    z-index: 80;
}

.sections-dropdown__summary:focus-visible {
    outline: none;
    box-shadow: var(--nav-chip-shadow-open);
}

.sections-dropdown__item:focus-visible {
    outline: 2px solid rgba(165, 180, 252, 0.85);
    outline-offset: 1px;
}

a.nav-btn-login:focus-visible,
button.nav-btn-login:focus-visible,
.fu-nav-btn-secondary:focus-visible {
    outline: 2px solid rgba(165, 180, 252, 0.9);
    outline-offset: 2px;
}