/* Language toggle + mobile nav */

.topnav-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-elev);
  font-size: 13px;
  font-weight: 500;
}
.lang-toggle button {
  background: transparent;
  border: none;
  font: inherit;
  color: var(--ink-mute);
  cursor: pointer;
  padding: 2px 4px;
  border-radius: 4px;
  transition: color 0.15s ease;
}
.lang-toggle button:hover { color: var(--ink-2); }
.lang-toggle button.active {
  color: var(--accent);
  font-weight: 600;
}
.lang-divider {
  color: var(--line-strong);
  font-size: 11px;
  user-select: none;
}

.nav-burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 36px; height: 36px;
  padding: 0 8px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}
.nav-burger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  border-radius: 1px;
}

/* Mobile */
@media (max-width: 900px) {
  .topnav-inner {
    padding: 14px 0;
  }
  .topnav-cta {
    display: none;
  }
  .nav-burger {
    display: flex;
  }
  .nav-links {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-2);
    transform: translateY(-110%);
    transition: transform 0.25s ease;
    z-index: 49;
    padding: 12px 24px 20px;
  }
  .nav-links.open {
    transform: translateY(0);
  }
  .nav-links a {
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
    color: var(--ink);
  }
  .nav-links a:last-child { border-bottom: none; }

  .brand span { font-size: 22px !important; }
  .brand img { height: 22px !important; }
}

/* Smaller adjustments for very narrow screens */
@media (max-width: 480px) {
  .wrap { padding: 0 20px; }
  section { padding: 64px 0; }
  .lang-toggle { font-size: 12px; padding: 3px 8px; }

  .hero h1 { font-size: clamp(40px, 12vw, 72px) !important; }
  .hero .meta-row { gap: 18px; }
  .hero .meta-row .num { font-size: 18px; }
  .hero-visual { height: 380px; }

  .compare .col { padding: 22px; min-height: auto; }
  .features-grid { gap: 14px; }
  .feature { padding: 24px; min-height: auto; }
  .who-card { padding: 0; }
  .cta-banner { padding: 56px 28px; }

  .topnav-inner { padding: 12px 0; }
  .nav-links a { font-size: 15px; }

  .foot-grid { flex-direction: column; align-items: flex-start !important; gap: 18px !important; }
}

/* CJK font preference */
:lang(zh) {
  font-family: "Noto Sans TC", "Inter", system-ui, sans-serif;
}