.site-navigation {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: min(calc(100% - 48px), 960px);
    z-index: 9999;
    opacity: 1;
    visibility: visible;
    transition: opacity 0.25s ease, visibility 0.25s ease, top 0.25s ease;
}

.site-navigation.navigation--hidden {
    opacity: 0;
    visibility: hidden;
    top: -10px;
    pointer-events: none;
}

.navigation-inner {
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 999px;
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 28px;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.09);
}

.navigation-logo {
    font-size: 15px;
    font-weight: 700;
    color: #0a0a0a;
    text-decoration: none;
    letter-spacing: -0.3px;
    white-space: nowrap;
    flex-shrink: 0;
}

.navigation-logo-dot {
    color: #2563eb;
}

.navigation-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.navigation-link {
    font-size: 14px;
    font-weight: 500;
    color: #111;
    text-decoration: none;
    letter-spacing: 0.01em;
    position: relative;
    white-space: nowrap;
    transition: color 0.15s;
}

.navigation-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: #2563eb;
    border-radius: 2px;
    transition: width 0.2s ease;
}

.navigation-link:hover                              { color: #2563eb; }
.navigation-link:hover::after                       { width: 100%; }

.navigation-link.navigation-link--active            { color: #2563eb; }
.navigation-link.navigation-link--active::after     { width: 100%; }

.navigation-right {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.navigation-locale-toggle {
    display: flex;
    align-items: center;
    gap: 3px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-decoration: none;
    background: #f0f0f0;
    border-radius: 999px;
    padding: 5px 13px;
    border: 1px solid transparent;
    line-height: 1;
    white-space: nowrap;
    user-select: none;
    transition: background 0.15s, border-color 0.15s;
}

.navigation-locale-toggle:hover {
    background: #e6f0ff;
    border-color: rgba(37, 99, 235, 0.25);
}

.navigation-locale-inactive { color: #aaa; font-weight: 500; }
.navigation-locale-divider  { color: #ccc; font-weight: 300; margin: 0 1px; }
.navigation-locale-active   { color: #2563eb; font-weight: 700; }

.navigation-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    background: transparent;
    border: none;
    padding: 0;
    cursor: pointer;
    flex-shrink: 0;
}

.navigation-bar {
    display: block;
    width: 22px;
    height: 2px;
    background: #111;
    border-radius: 2px;
    transform-origin: center;
    transition: transform 0.25s ease, opacity 0.25s ease, background 0.2s ease;
}

.navigation-hamburger.is-open .navigation-bar:nth-child(1) { transform: translateY(7px) rotate(45deg);   background: #000; }
.navigation-hamburger.is-open .navigation-bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.navigation-hamburger.is-open .navigation-bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); background: #000; }

.navigation-overlay {
    position: fixed;
    inset: 0;
    z-index: 9998;
    background: #080c14;
    background-image:
        radial-gradient(ellipse 80% 60% at 50% 0%,    rgba(37, 99, 235, 0.12) 0%, transparent 70%),
        radial-gradient(ellipse 60% 50% at 100% 100%, rgba(0, 170, 255, 0.07) 0%, transparent 65%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 40px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.35s ease, visibility 0.35s ease;
}

.navigation-overlay.is-open {
    opacity: 1;
    visibility: visible;
}

.navigation-overlay-links {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.navigation-overlay-links li {
    opacity: 0;
    transform: translateY(14px);
}

.navigation-overlay.is-open .navigation-overlay-links li {
    animation: navigationItemIn 0.4s ease forwards;
}

.navigation-overlay.is-open .navigation-overlay-links li:nth-child(1) { animation-delay: 0.05s; }
.navigation-overlay.is-open .navigation-overlay-links li:nth-child(2) { animation-delay: 0.10s; }
.navigation-overlay.is-open .navigation-overlay-links li:nth-child(3) { animation-delay: 0.15s; }
.navigation-overlay.is-open .navigation-overlay-links li:nth-child(4) { animation-delay: 0.20s; }
.navigation-overlay.is-open .navigation-overlay-links li:nth-child(5) { animation-delay: 0.25s; }
.navigation-overlay.is-open .navigation-overlay-links li:nth-child(6) { animation-delay: 0.30s; }
.navigation-overlay.is-open .navigation-overlay-links li:nth-child(7) { animation-delay: 0.35s; }

@keyframes navigationItemIn {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}

.navigation-overlay-link {
    display: block;
    font-size: 38px;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.80);
    text-decoration: none;
    letter-spacing: -0.8px;
    padding: 8px 24px;
    border-radius: 8px;
    position: relative;
    transition: color 0.18s, letter-spacing 0.18s;
}

.navigation-overlay-link::after {
    content: '';
    position: absolute;
    bottom: 6px;
    left: 24px;
    width: 0;
    height: 3px;
    background: #2563eb;
    border-radius: 2px;
    transition: width 0.22s ease;
}

.navigation-overlay-link:hover                              { color: #fff; letter-spacing: -0.4px; }
.navigation-overlay-link:hover::after                       { width: calc(100% - 48px); }

.navigation-overlay-link.navigation-link--active            { color: #fff; }
.navigation-overlay-link.navigation-link--active::after     { width: calc(100% - 48px); }

.navigation-overlay .navigation-locale-toggle {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    font-size: 12px;
    padding: 7px 18px;
    transition: background 0.15s, border-color 0.15s;
}

.navigation-overlay .navigation-locale-toggle:hover {
    background: rgba(37, 99, 235, 0.25);
    border-color: rgba(37, 99, 235, 0.45);
}

.navigation-overlay .navigation-locale-inactive { color: rgba(255, 255, 255, 0.30); }
.navigation-overlay .navigation-locale-divider  { color: rgba(255, 255, 255, 0.15); }
.navigation-overlay .navigation-locale-active   { color: #60a5fa; }

section[id],
div[id].scroll-target {
    scroll-margin-top: 94px;
}

@media (max-width: 900px) {
    .navigation-links { gap: 20px; }
    .navigation-inner { padding: 0 22px; }
}

@media (max-width: 940px) {
    .site-navigation {
        width: min(calc(100% - 32px), 820px);
        top: 12px;
    }

    .navigation-inner {
        padding: 0 18px;
    }

    .navigation-links                               { display: none; }
    .navigation-right > .navigation-locale-toggle   { display: none; }
    .navigation-hamburger                           { display: flex; }

    section[id],
    div[id].scroll-target {
        scroll-margin-top: 78px;
    }
}

@media (max-width: 400px) {
    .navigation-logo { font-size: 14px; }
}