#site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2.5rem;
    transition: transform 0.35s ease;
}

.nav-logo {
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 1.25rem;
    letter-spacing: 0.28em;
    color: #fff;
    text-decoration: none;
    text-transform: uppercase;
}

.nav-logo span {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: #fff;
    border-radius: 50%;
    margin-left: 6px;
    vertical-align: middle;
    margin-bottom: 2px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-links > li {
    position: relative;
}

.nav-item-has-dropdown::after {
    content: '';
    position: absolute;
    top: 100%;
    left: -0.75rem;
    right: -0.75rem;
    height: 0.7rem;
    z-index: 1;
}

.nav-links a,
.nav-links button {
    position: relative;
    font-size: 0.72rem;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.60);
    text-decoration: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px 0;
    font-family: inherit;
    transition: color 0.4s ease, text-shadow 0.4s ease;
    overflow: hidden;
}

.nav-dropdown-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
}

.nav-dropdown-chevron {
    width: 0.42rem;
    height: 0.42rem;
    border-right: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
    transform: translateY(-2px) rotate(45deg);
    transition: transform 0.2s ease;
}

.nav-item-has-dropdown:hover .nav-dropdown-chevron,
.nav-item-has-dropdown:focus-within .nav-dropdown-chevron {
    transform: translateY(0) rotate(225deg);
}

.nav-links a::after,
.nav-links button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.9), transparent);
    transform: translateX(-50%);
    transition: width 0.45s cubic-bezier(0.25, 1, 0.5, 1);
}

.nav-links a:hover,
.nav-links button:hover {
    color: #fff;
    text-shadow: 0 0 18px rgba(255, 255, 255, 0.55), 0 0 40px rgba(180, 200, 255, 0.20);
}

.nav-links a:hover::after,
.nav-links button:hover::after {
    width: 100%;
}

.nav-dropdown {
    position: absolute;
    top: calc(100% + 0.45rem);
    left: 50%;
    z-index: 2;
    min-width: 190px;
    list-style: none;
    margin: 0;
    padding: 0.7rem 0;
    background: rgba(10, 10, 10, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.16);
    backdrop-filter: blur(16px);
    transform: translate(-50%, 8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.nav-item-has-dropdown:hover .nav-dropdown,
.nav-item-has-dropdown:focus-within .nav-dropdown {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translate(-50%, 0);
}

.nav-dropdown a {
    display: block;
    padding: 0.65rem 1rem;
    color: rgba(255, 255, 255, 0.72);
    white-space: nowrap;
}

.nav-dropdown a::after {
    display: none;
}

.nav-dropdown a:hover {
    color: #fff;
}

.btn-signin {
    position: relative;
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.32);
    background: transparent;
    padding: 0.48rem 1.4rem;
    border-radius: 3px;
    cursor: pointer;
    text-decoration: none;
    font-family: 'Montserrat', sans-serif;
    overflow: hidden;
    transition: color 0.4s ease, border-color 0.4s ease, text-shadow 0.4s ease;
}

.btn-signin::before {
    content: '';
    position: absolute;
    top: 0;
    left: -75%;
    width: 50%;
    height: 100%;
    background: linear-gradient(120deg, transparent 0%, rgba(255, 255, 255, 0.18) 50%, transparent 100%);
    transform: skewX(-20deg);
    transition: left 0.55s ease;
}

.btn-signin:hover {
    border-color: rgba(255, 255, 255, 0.80);
    text-shadow: 0 0 16px rgba(255, 255, 255, 0.50);
}

.btn-signin:hover::before {
    left: 130%;
}

.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-family: 'Montserrat', sans-serif;
}

.lang-option {
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.55);
    text-decoration: none;
    transition: color 0.4s ease, text-shadow 0.4s ease;
}

.lang-option:hover {
    color: #fff;
    text-shadow: 0 0 16px rgba(255, 255, 255, 0.50);
}

.lang-option.is-active {
    color: #fff;
}

.lang-sep {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.30);
    user-select: none;
}

.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 10px;
    margin: -10px;
    position: relative;
    z-index: 130;
}

.nav-mobile-toggle span {
    display: block;
    width: 22px;
    height: 1.5px;
    background: #fff;
    transition: transform 0.25s ease, opacity 0.25s ease, background 0.25s ease;
    transform-origin: center;
}

.mobile-menu-panel {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6rem 1.5rem 2rem;
    background: rgba(8, 8, 8, 0.94);
    backdrop-filter: blur(18px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.28s ease, visibility 0.28s ease;
}

.mobile-menu-panel[hidden] {
    display: flex;
}

.mobile-menu-links {
    width: min(100%, 420px);
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.mobile-menu-links a {
    display: block;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    color: #fff;
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(1.1rem, 7vw, 2rem);
    font-weight: 700;
    letter-spacing: 0.08em;
    line-height: 1.1;
    text-transform: uppercase;
    text-decoration: none;
}

.mobile-submenu-links {
    list-style: none;
    margin: -0.35rem 0 0.85rem;
    padding: 0;
}

.mobile-submenu-links a {
    padding: 0.55rem 0 0.55rem 1rem;
    border-bottom: none;
    color: rgba(255, 255, 255, 0.68);
    font-size: clamp(0.82rem, 4vw, 1.05rem);
    font-weight: 600;
    letter-spacing: 0.14em;
}

body.is-menu-open {
    overflow: hidden;
}

body.is-menu-open .mobile-menu-panel {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

body.is-menu-open .nav-mobile-toggle span:nth-child(1) {
    transform: translateY(6.5px) rotate(45deg);
}

body.is-menu-open .nav-mobile-toggle span:nth-child(2) {
    opacity: 0;
}

body.is-menu-open .nav-mobile-toggle span:nth-child(3) {
    transform: translateY(-6.5px) rotate(-45deg);
}

/* Dark / Scrolled state - Transparent but visible text */
#site-header.scrolled {
    background: transparent;
    backdrop-filter: none;
    border-bottom: none;
    box-shadow: none;
}

#site-header.scrolled .nav-logo {
    color: #000;
}

#site-header.scrolled .nav-logo span {
    background: #000;
}

#site-header.scrolled .nav-links a,
#site-header.scrolled .nav-links button {
    color: rgba(0, 0, 0, 0.65);
}

#site-header.scrolled .nav-links a:hover,
#site-header.scrolled .nav-links button:hover {
    color: #000;
    text-shadow: none;
}

#site-header.scrolled .nav-links a::after,
#site-header.scrolled .nav-links button::after {
    background: #000;
}

#site-header.scrolled .nav-dropdown {
    background: rgba(255, 255, 255, 0.92);
    border-color: rgba(0, 0, 0, 0.10);
    box-shadow: 0 18px 44px rgba(0, 0, 0, 0.10);
}

#site-header.scrolled .nav-dropdown a {
    color: rgba(0, 0, 0, 0.62);
}

#site-header.scrolled .nav-dropdown a:hover {
    color: #000;
}

#site-header.scrolled .btn-signin {
    color: #000;
    border-color: rgba(0, 0, 0, 0.2);
}

#site-header.scrolled .btn-signin:hover {
    border-color: #000;
    background: rgba(0, 0, 0, 0.03);
    text-shadow: none;
}

#site-header.scrolled .nav-mobile-toggle span {
    background: #000;
}

#site-header.scrolled .lang-option {
    color: rgba(0, 0, 0, 0.5);
}

#site-header.scrolled .lang-option:hover,
#site-header.scrolled .lang-option.is-active {
    color: #000;
    text-shadow: none;
}

#site-header.scrolled .lang-sep {
    color: rgba(0, 0, 0, 0.30);
}

@media (max-width: 860px) {
    #site-header {
        height: 58px;
        padding: 0 1rem;
    }

    .nav-logo {
        font-size: clamp(0.9rem, 4.4vw, 1.15rem);
        letter-spacing: 0.18em;
    }

    .nav-links,
    .btn-signin {
        display: none;
    }

    .nav-mobile-toggle {
        display: flex;
    }

    body.is-menu-open #site-header,
    body.is-menu-open #site-header.scrolled {
        /* A transform on the fixed header turns it into the containing block
           for the fixed mobile panel, shrinking the panel to header height.
           `none` keeps the header visible while preserving the panel's
           viewport-sized positioning. */
        transform: none !important;
        z-index: 1000;
    }

    body.is-menu-open #site-header .nav-logo,
    body.is-menu-open #site-header.scrolled .nav-logo {
        color: #fff;
    }

    body.is-menu-open #site-header .nav-logo span,
    body.is-menu-open #site-header.scrolled .nav-logo span,
    body.is-menu-open #site-header .nav-mobile-toggle span,
    body.is-menu-open #site-header.scrolled .nav-mobile-toggle span {
        background: #fff;
    }

    .lang-switch {
        gap: 0.4rem;
        position: relative;
        z-index: 130;
    }

    .lang-option,
    .lang-sep {
        font-size: 0.66rem;
        letter-spacing: 0.14em;
    }

    .lang-option {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        min-width: 2rem;
        min-height: 2.75rem;
    }

    .nav-mobile-toggle {
        width: 2.75rem;
        height: 2.75rem;
        align-items: center;
        justify-content: center;
        padding: 0;
        margin: 0;
    }

    body.is-menu-open #site-header .lang-option,
    body.is-menu-open #site-header.scrolled .lang-option {
        color: rgba(255, 255, 255, 0.55);
        text-shadow: none;
    }

    body.is-menu-open #site-header .lang-option.is-active,
    body.is-menu-open #site-header.scrolled .lang-option.is-active {
        color: #fff;
    }

    body.is-menu-open #site-header .lang-sep,
    body.is-menu-open #site-header.scrolled .lang-sep {
        color: rgba(255, 255, 255, 0.30);
    }
}

@media (max-width: 420px) {
    #site-header {
        padding: 0 0.875rem;
    }

    .nav-logo {
        letter-spacing: 0.14em;
    }
}