:root {
    --navmenu-img-h: 52px;
    --navmenu-pad-v: 0.85rem;
    --topbar-h: calc(var(--navmenu-pad-v) * 2 + var(--navmenu-img-h));

    --navmenu-z-overlay: 1150;
    --navmenu-z-topbar: 1200;
    --navmenu-z-drawer: 1210;
    --navmenu-z-cascade: 1220;

    scroll-behavior: smooth;
    scroll-padding-top: var(--topbar-h);
}

@media (prefers-reduced-motion: reduce) {
    :root {

        scroll-behavior: auto;
    }
}

@media (max-width: 900px) {

    :root {
        --navmenu-img-h: 36px;
    }
}


.topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;

    z-index: var(--navmenu-z-topbar);
    isolation: isolate;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.85rem clamp(1rem, 4vw, 2.5rem);
    background: transparent;
    transition: background 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
    border-bottom: 1px solid transparent;
}


    .topbar.is-scrolled,
    .topbar.nav-is-open {
        background: rgba(252, 251, 249, 0.92);
        border-bottom-color: rgba(226, 232, 240, 0.6);
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    }


@media (min-width: 901px) {
    .topbar.is-scrolled,
    .topbar.nav-is-open {
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
    }
}

.topbar__brand {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    font-weight: 800;
    font-size: 1rem;
    letter-spacing: -0.02em;

    color: var(--white);
    transition: color 0.35s ease;
}


.topbar__brand span {
    white-space: nowrap;
}

.topbar.is-scrolled .topbar__brand,
.topbar.nav-is-open .topbar__brand {
    color: var(--slate-900);
}


.topbar__brand img {
    width: auto;
    height: 52px;
    object-fit: contain;
}

.topbar nav {
    display: flex;
    align-items: center;

    gap: 0.1rem;
}

    .topbar nav a {
        display: inline-flex;
        align-items: center;
        gap: 0.35rem;
        text-decoration: none;
        font-size: 0.88rem;
        font-weight: 600;

        padding: 0.45rem 0.72rem;
        border-radius: var(--radius-md);
        transition: color 0.2s ease, background 0.2s ease;

        color: rgba(255, 255, 255, 0.8);
    }

        .topbar nav a:hover {
            color: var(--white);
            background: rgba(255, 255, 255, 0.1);
        }

        .topbar nav a.active {
            color: var(--white);
            background: rgba(255, 255, 255, 0.15);
        }


.topbar.is-scrolled nav a,
.topbar.nav-is-open nav a {
    color: var(--slate-600);
}

    .topbar.is-scrolled nav a:hover,
    .topbar.nav-is-open nav a:hover {
        color: var(--slate-900);
        background: var(--slate-100);
    }

    .topbar.is-scrolled nav a.active,
    .topbar.nav-is-open nav a.active {
        color: var(--accent);
        background: var(--accent-soft);
    }



.topbar a:focus-visible,
.topbar button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}


.topbar__toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--white);
    transition: color 0.35s ease;
}

.topbar.is-scrolled .topbar__toggle,
.topbar.nav-is-open .topbar__toggle {
    color: var(--slate-700);
}

.topbar__toggle svg {
    width: 24px;
    height: 24px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
}


.nav-cascade {
    position: relative;
    display: inline-flex;
}


    .nav-cascade::after {
        content: "";
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        height: 0.75rem;
    }

.nav-cascade__trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.nav-cascade__caret {
    line-height: 1;
    opacity: 0.6;
    transition: transform 0.25s var(--ease-out);
}

.nav-cascade.is-open .nav-cascade__caret {
    transform: rotate(180deg);
}

.nav-cascade__menu {
    position: absolute;
    top: calc(100% + 0.75rem);
    z-index: 50;
    display: none;
    flex-direction: column;
    gap: 0.15rem;
    padding: 0.5rem;
    border: 1px solid var(--slate-200);
    border-radius: var(--radius-lg);
    white-space: nowrap;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.12), 0 2px 8px rgba(0, 0, 0, 0.06);
    animation: navMenuReveal 0.25s var(--ease-out);
}


@keyframes navMenuReveal {
    from {
        opacity: 0;
        transform: translateY(-8px) scale(0.97);
    }

    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.nav-cascade:hover .nav-cascade__menu,
.nav-cascade:focus-within .nav-cascade__menu,
.nav-cascade.is-open .nav-cascade__menu {
    display: flex;
}


.topbar .nav-cascade__menu a,
.topbar.is-scrolled .nav-cascade__menu a,
.topbar.nav-is-open .nav-cascade__menu a {
    border-radius: var(--radius-sm);
    padding: 0.55rem 0.75rem;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--slate-700);
    transition: background 0.15s ease, color 0.15s ease;
    text-decoration: none;
}

.topbar .nav-cascade__menu a:hover,
.topbar.is-scrolled .nav-cascade__menu a:hover,
.topbar.nav-is-open .nav-cascade__menu a:hover {
    background: var(--slate-100);
    color: var(--slate-900);
}

.topbar .nav-cascade__menu a.active,
.topbar.is-scrolled .nav-cascade__menu a.active,
.topbar.nav-is-open .nav-cascade__menu a.active {
    color: var(--accent);
    background: var(--accent-soft);
    font-weight: 600;
}


.nav-cascade__back {
    display: none;
}


.topbar__locale-toggle {
    display: inline-flex;
    align-items: center;

    gap: 0.08rem;

    box-sizing: border-box;

    margin-left: 0.5rem;
    padding-left: 0.75rem;
    border-left: 1px solid rgba(255, 255, 255, 0.2);
    transition: border-color 0.35s ease;
}

.topbar.is-scrolled .topbar__locale-toggle {
    border-left-color: rgba(0, 0, 0, 0.12);
}

.topbar__locale-option {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: 2px solid transparent;

    border-radius: 0;
    padding: 2px;
    cursor: pointer;
    transition: border-color 0.2s ease, opacity 0.2s ease;
    opacity: 0.55;
    line-height: 0;
}



.topbar nav .topbar__locale-option {

    border-radius: 0;
    padding: 2px;
    margin: 0;
}

.topbar nav .topbar__locale-option:focus-visible {

    border-radius: 0 !important;
}

    .topbar__locale-option:hover {
        opacity: 1;
        border-color: rgba(255, 255, 255, 0.4);
    }

    .topbar__locale-option.is-active {
        opacity: 1;
        border-color: rgba(255, 255, 255, 0.9);
    }

.topbar.is-scrolled .topbar__locale-option:hover {
    border-color: rgba(0, 0, 0, 0.25);
}

.topbar.is-scrolled .topbar__locale-option.is-active {
    border-color: var(--accent);
}

.topbar__locale-flag {
    width: 20px;
    height: 20px;
    object-fit: cover;
    display: block;
}


html.navmenu-lock-scroll,
body.navmenu-lock-scroll {
    overflow: hidden;
}


@media (max-width: 900px) {


    .topbar nav {
        display: none;
        position: fixed;
        top: var(--topbar-h, 68px);
        left: 0;
        max-width: 100vw;

        white-space: normal;
        overflow-wrap: anywhere;
        background: var(--white);
        flex-direction: column;

        align-items: stretch;
        padding: 0.5rem 0.75rem 1.5rem;
        gap: 0.15rem;
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
        z-index: var(--navmenu-z-drawer);
        overflow-y: auto;
        max-height: calc(100dvh - var(--topbar-h, 68px));
    }


        .topbar nav.is-open {
            display: inline-flex;
        }


            .topbar nav.is-open a,
            .topbar.is-scrolled nav.is-open a,
            .topbar.nav-is-open nav.is-open a {
                color: var(--slate-700);
                padding: 0.55rem 0.75rem;
                border-radius: var(--radius-md);
                font-size: 1rem;
            }

            .topbar nav.is-open a:hover,
            .topbar.is-scrolled nav.is-open a:hover,
            .topbar.nav-is-open nav.is-open a:hover {
                background: var(--slate-100);
                color: var(--slate-900);
            }

            .topbar nav.is-open a.active,
            .topbar.is-scrolled nav.is-open a.active,
            .topbar.nav-is-open nav.is-open a.active {
                color: var(--accent);
                background: var(--accent-soft);
            }


    .topbar__toggle {
        display: block;
        order: -1;

        flex-shrink: 0;

        min-width: 44px;
        min-height: 44px;
    }


    .topbar__brand {
        min-width: 0;
        flex: 1 1 auto;
    }

        .topbar__brand img {
            width: auto;
            height: 36px;
            flex-shrink: 0;
        }

        .topbar__brand span {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            font-size: 0.85rem;
        }


    .topbar__locale-toggle {
        width: 100%;
        padding: 0.75rem 1rem 0.5rem;
        margin-left: 0;
        border-left: none;
        border-top: 1px solid var(--slate-200);
        gap: 0.12rem;
        justify-content: flex-start;
        flex-wrap: wrap;
    }

    .topbar.is-scrolled .topbar__locale-toggle {
        border-left: none;
    }

    .topbar__locale-option:hover {
        border-color: rgba(0, 0, 0, 0.2);
    }

    .topbar__locale-option.is-active {
        border-color: var(--accent);
    }

    .topbar__locale-flag {
        width: 24px;
        height: 24px;
    }


    .nav-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: var(--navmenu-z-overlay);
    }

        .nav-overlay.is-open {
            display: block;
        }


    .nav-cascade {
        display: flex;
        flex-direction: column;
    }


    .nav-cascade__trigger {
        align-self: stretch;
    }


    .nav-cascade__menu {
        position: fixed;
        top: var(--topbar-h, 68px);
        left: 0;
        max-width: 100vw;
        display: inline-flex;
        flex-direction: column;
        pointer-events: none;
        transform: translateX(-100%);
        visibility: hidden;
        transition: transform 0.3s var(--ease-out), visibility 0s 0.3s;
        z-index: var(--navmenu-z-cascade);
        border-radius: 0;
        border: none;
        border-right: 1px solid var(--slate-200);
        background: var(--white);
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.12);
        overflow-y: auto;
        animation: none;
        white-space: nowrap;
        gap: 0.15rem;
        max-height: calc(100dvh - var(--topbar-h, 68px));
    }

    .nav-cascade.is-open .nav-cascade__menu {
        transform: translateX(0);
        pointer-events: auto;
        visibility: visible;

        transition-delay: 0s;
    }


    .topbar .nav-cascade__menu a,
    .topbar.is-scrolled .nav-cascade__menu a,
    .topbar.nav-is-open .nav-cascade__menu a {
        color: var(--slate-700);
        font-size: 1rem;
        padding: 0.75rem 1rem;
        border-radius: var(--radius-md);
    }

    .topbar .nav-cascade__menu a:hover,
    .topbar.is-scrolled .nav-cascade__menu a:hover,
    .topbar.nav-is-open .nav-cascade__menu a:hover {
        background: var(--slate-100);
        color: var(--slate-900);
    }

    .topbar .nav-cascade__menu a.active,
    .topbar.is-scrolled .nav-cascade__menu a.active,
    .topbar.nav-is-open .nav-cascade__menu a.active {
        color: var(--accent);
        background: var(--accent-soft);
        font-weight: 600;
    }



    .nav-cascade__back {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        background: none;
        border: none;
        border-bottom: 1px solid var(--slate-200);
        font: inherit;
        font-size: 0.92rem;
        font-weight: 600;
        color: var(--slate-500);
        cursor: pointer;
        padding: 0.75rem 0.5rem;

        min-height: 44px;
        margin-bottom: 0.5rem;
        text-align: left;
    }

        .nav-cascade__back svg {
            width: 18px;
            height: 18px;
            stroke: currentColor;
            stroke-width: 2.5;
            fill: none;
            flex-shrink: 0;
        }

        .nav-cascade__back:hover {
            color: var(--slate-900);
        }
}