.os-header {
    position: sticky;
    top: 0;
    z-index: 9999;
    background: rgba(15,15,20,0.92);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.os-header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 64px;
}
.os-logo a { display: flex; align-items: center; text-decoration: none; }
.os-logo-svg { display: block; height: 33px; width: auto; }

.os-nav-list {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 0.25rem;
}
.os-nav-list li { position: relative; }
.os-nav-list li a {
    display: block;
    padding: 0.5rem 0.9rem;
    color: #8b8b9e !important;
    font-family: 'Outfit', sans-serif;
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    border-radius: 8px;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}
.os-nav-list li a:hover,
.os-nav-list li.current-menu-item > a,
.os-nav-list li.current_page_item > a {
    color: #fff !important;
    background: rgba(255,255,255,0.06);
}
.os-nav-list li ul.sub-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #16161e;
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 0.5rem;
    min-width: 200px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.4);
    z-index: 100;
    list-style: none;
}
.os-nav-list li:hover > ul.sub-menu { display: block; }
.os-nav-list li ul.sub-menu li a { font-size: 0.8rem; padding: 0.5rem 0.8rem; }

.os-mobile-toggle {
    display: none;
    background: none !important;
    border: none !important;
    padding: 0.5rem !important;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
    box-shadow: none !important;
    transform: none !important;
}
.os-mobile-toggle span {
    display: block; width: 24px; height: 2px;
    background: #e8e8ed; border-radius: 2px;
    transition: all 0.2s ease;
}
@media (max-width: 900px) {
    .os-mobile-toggle { display: flex !important; }
    .os-logo-svg { height: 26px; }
    .os-nav {
        display: none; position: absolute;
        top: 64px; left: 0; right: 0;
        background: rgba(15,15,20,0.98);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid rgba(255,255,255,0.06);
        padding: 1rem;
    }
    .os-nav.open { display: block; }
    .os-nav-list { flex-direction: column; gap: 0; }
    .os-nav-list li a { padding: 0.8rem 1rem; }
    .os-nav-list li ul.sub-menu {
        position: static; box-shadow: none; border: none;
        background: rgba(255,255,255,0.03); padding-left: 1rem;
    }
    .os-header-inner { padding: 0 1rem; }
}

/* ═══ Protect SVG logo from CSS font inheritance ═══ */
.os-logo svg text,
.os-logo-svg text,
svg.os-logo-svg text {
    font-style: normal !important;
    font-weight: 900 !important;
    font-family: Outfit, Impact, 'Arial Black', sans-serif !important;
    letter-spacing: 2px !important;
    text-decoration: none !important;
    text-transform: none !important;
}

/* Mobile submenu toggle */
@media (max-width: 900px) {
    .os-nav-list li ul.sub-menu { max-height:0; overflow:hidden; transition:max-height 0.3s ease; }
    .os-nav-list li.sub-open > ul.sub-menu { max-height:600px; }
    .os-nav-list > li.menu-item-has-children > a::after { content:'▾'; margin-left:8px; font-size:0.7rem; transition:transform 0.2s; }
    .os-nav-list > li.menu-item-has-children.sub-open > a::after { transform:rotate(180deg); }
    .os-nav { max-height:80vh; overflow-y:auto; }
}