/* ─── Header, brand, navigation ─── */

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  min-height: 64px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 24px;
  padding: 0 48px;
  border-bottom: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.375rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand.small {
  font-size: 1.0625rem;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 3px solid #17c8b0;
  position: relative;
  box-shadow: inset 0 0 0 5px var(--surface), inset 0 0 0 9px #dff8f3;
}

.brand-mark::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  inset: 50% auto auto 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: var(--accent);
}

.nav-links,
.footer nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--text);
}

.nav-links a.is-active,
.footer nav a.is-active {
  color: var(--accent);
  font-weight: 800;
}

.nav-actions {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 12px;
}

.user-display {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-muted);
  max-width: 140px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.lang-control {
  display: inline-flex;
  align-items: center;
}

.lang-control select {
  width: auto;
  min-width: 80px;
  min-height: 32px;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0 4px 0 8px;
  border-radius: 6px;
  cursor: pointer;
}

.font-scale-control {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
}

.font-scale-control span {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.font-scale-control select {
  width: 52px;
  min-height: 32px;
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 0 4px 0 8px;
  border-radius: 6px;
}

.icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 0;
  border-radius: 10px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
  flex-shrink: 0;
  text-decoration: none;
}

.icon-btn:hover {
  background: var(--surface-soft);
}

.mobile-only {
  display: none;
}