header {
    position: sticky;
    top: 0; z-index: 1000; width: 100%;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(26, 63, 255, 0.08);
    transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
[data-theme="dark"] header {
    background: rgba(13, 17, 23, 0.88);
    border-bottom-color: rgba(77, 115, 255, 0.1);
}
header.scrolled {
    background: rgba(255, 255, 255, 0.97);
    box-shadow: 0 4px 24px rgba(10, 22, 40, 0.08);
    border-color: rgba(26, 63, 255, 0.1);
}
[data-theme="dark"] header.scrolled {
    background: rgba(13, 17, 23, 0.98);
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}
#navbar {
    width: min(100%, 1240px); margin: 0 auto; padding: 14px 8%;
    display: flex; align-items: center;
    justify-content: space-between; gap: 20px;
}

/* ── Brand ───────────────────────────────────── */
.brand {
    display: inline-flex; align-items: center;
    gap: 0; text-decoration: none; flex-shrink: 0; min-width: 0;
}
.brand-text {
    display: flex; flex-direction: column;
    justify-content: center; line-height: 1.05; min-width: 0;
}
.brand-text strong {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-size: 1rem; font-weight: 700; font-style: italic;
    color: var(--text); white-space: nowrap; letter-spacing: -0.01em;
}
.brand-text small {
    font-family: 'Jost', sans-serif;
    font-size: 0.68rem; font-weight: 500;
    color: var(--text-3); white-space: nowrap;
    margin-top: 3px; letter-spacing: 0.07em; text-transform: uppercase;
}

/* ── Nav list ────────────────────────────────── */
#nav_list {
    display: flex; align-items: center;
    list-style: none; gap: 4px;
    margin-left: auto; margin-right: 10px;
}
.nav-item a {
    display: inline-flex; align-items: center;
    text-decoration: none; color: var(--text-2);
    font-family: 'Jost', sans-serif;
    font-weight: 500; font-size: 0.88rem;
    padding: 8px 13px; border-radius: 999px;
    transition: color 0.2s ease, background 0.2s ease;
    white-space: nowrap;
}
.nav-item a:hover,
#nav_list a.active,
#mobile_nav_list a.active {
    color: var(--primary); background: var(--primary-dim);
}

/* ── Nav actions ─────────────────────────────── */
.nav-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

/* ── Language switcher ───────────────────────── */
.language-switcher {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 4px; border-radius: 999px;
    background: var(--primary-dim); border: 1px solid var(--border);
}
.lang-btn {
    min-width: 40px; height: 32px; border: none;
    border-radius: 999px; background: transparent;
    color: var(--text-2); font-family: 'Jost', sans-serif;
    font-size: 0.78rem; font-weight: 700;
    letter-spacing: 0.08em; cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}
.lang-btn:hover { color: var(--primary); transform: translateY(-1px); }
.lang-btn.active {
    background: var(--primary); color: #fff;
    box-shadow: 0 2px 8px rgba(26, 63, 255, 0.28);
}

/* ── Theme toggle ────────────────────────────── */
.theme-btn {
    width: 36px; height: 36px;
    display: inline-flex; align-items: center; justify-content: center;
    border: 1.5px solid var(--border); border-radius: 50%;
    background: var(--primary-dim); color: var(--text-2);
    font-size: 0.85rem; cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease,
                color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
}
.theme-btn:hover {
    background: var(--primary-dim); border-color: var(--primary);
    color: var(--primary); transform: rotate(15deg) translateY(-1px);
}

/* ── CTA ─────────────────────────────────────── */
.nav-cta { font-size: 0.87rem; min-height: 42px; padding: 10px 22px; white-space: nowrap; }

/* ── Mobile button ───────────────────────────── */
#mobile_btn {
    display: none; align-items: center; justify-content: center;
    width: 44px; height: 44px; flex-shrink: 0;
    border: 1.5px solid var(--border); border-radius: 12px;
    background: var(--primary-dim); color: var(--text-2);
    font-size: 1rem; cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}
#mobile_btn:hover {
    background: var(--primary-dim); border-color: var(--border);
    transform: translateY(-1px);
}

/* ── Mobile menu ─────────────────────────────── */
#mobile_menu {
    width: min(100%, 1240px); margin: 0 auto; padding: 0 8%;
    overflow: hidden; max-height: 0; visibility: hidden;
    transition: max-height 0.35s ease, padding-bottom 0.35s ease, visibility 0.35s ease;
}
#mobile_menu.active { max-height: 520px; padding-bottom: 18px; visibility: visible; }
#mobile_nav_list {
    list-style: none; display: flex; flex-direction: column; gap: 4px;
    padding: 12px 10px 16px; margin-top: 6px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 18px; box-shadow: var(--shadow-lg);
}
#mobile_nav_list .nav-item { padding: 0 6px; }
#mobile_nav_list .nav-item a { display: flex; width: 100%; padding: 11px 14px; border-radius: 12px; }
.mobile-controls {
    margin-top: 12px; display: flex; align-items: center;
    justify-content: space-between; gap: 12px;
    background: var(--surface); border: 1px solid var(--border);
    border-radius: 16px; padding: 10px 16px;
    box-shadow: 0 8px 24px rgba(10, 22, 40, 0.1);
}
.mobile-controls .language-switcher { flex: 1; justify-content: center; }
.mobile-controls .theme-btn { width: 40px; height: 40px; font-size: 0.9rem; }
.mobile-cta { margin-top: 12px; width: 100%; justify-content: center; display: flex; }

/* ── Breakpoints ─────────────────────────────── */
@media (max-width: 1240px) {
    #navbar { padding: 14px 6%; }
    #mobile_menu { padding: 0 6%; }
    #nav_list { gap: 2px; }
    .nav-item a { font-size: 0.85rem; padding: 8px 11px; }
    .nav-cta { padding: 10px 18px; font-size: 0.84rem; }
    .brand-text strong { font-size: 0.95rem; }
}
@media (max-width: 1170px) {
    #nav_list, .nav-actions { display: none; }
    #mobile_btn { display: inline-flex; }
}
@media (max-width: 600px) {
    #navbar { padding: 13px 5%; }
    #mobile_menu { padding: 0 5%; }
    .brand-text small { display: none; }
}