/* ── Header shell ──────────────────────────────────────────────────────────── */

.header {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 0 12px;
  height: 48px;
  flex-shrink: 0;
  background: var(--bg-warm);
  border-bottom: 1px solid var(--border-warm);
  overflow: hidden;
}

/* ── Brand zone ────────────────────────────────────────────────────────────── */

.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  color: var(--text);
}

.wordmarkText {
  font-family: var(--font-serif);
  font-weight: 640;
  font-size: var(--fs-wordmark);
  margin: 0;
  letter-spacing: 0.04em;
  color: var(--text);
  white-space: nowrap;
}

.tag {
  color: var(--text-tag);
  font-size: var(--fs-sub);
  white-space: nowrap;
}

/* ── Keyboard shortcut badge (inside Run button) ───────────────────────────── */

kbd {
  font-size: var(--fs-label);
  color: var(--white-80);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 3px;
  padding: 1px 4px;
  font-family: inherit;
  letter-spacing: 0;
}

/* ── Help button pulse ─────────────────────────────────────────────────────── */

@keyframes helpPulse {
  0% {
    transform: scale(1);
    box-shadow: 0 0 0px var(--gold-0, transparent);
  }
  8% {
    transform: scale(1.12);
    box-shadow: 0 0 14px var(--gold-45);
  }
  18% {
    transform: scale(1);
    box-shadow: 0 0 0px var(--gold-0, transparent);
  }
  100% {
    transform: scale(1);
    box-shadow: 0 0 0px var(--gold-0, transparent);
  }
}

.helpBtn {
  margin-left: 8px;
}

@media (prefers-reduced-motion: no-preference) {
  .helpBtn {
    animation: helpPulse 10s ease-in-out infinite;
  }
}