.ds-promo {
    position: fixed; left: 0; right: 0;
    top: calc(var(--ds-maint-h) + var(--ds-notice-h));
    height: var(--ds-promo-h);
    z-index: calc(var(--z-header) + 1);
    overflow: hidden;
    background: linear-gradient(90deg, #2a1240 0%, #1d0f33 45%, #0b1226 100%);
    color: #fdfcfa;
    font-size: 13.5px;
  }
  :root[data-promo='off'] .ds-promo { display: none; }
  .ds-promo-inner {
    position: relative; z-index: 1; height: 100%;
    display: flex; align-items: center; justify-content: center; gap: 10px;
    /* Same measure as the masthead, so the close sits under "Open CleanFlo". */
    padding: 0 var(--ds-ledger-gutter, 48px); max-width: var(--ds-ledger-w, 1240px); margin: 0 auto; box-sizing: border-box;
  }
  .ds-promo-text { margin: 0; display: flex; align-items: center; gap: 6px; flex-wrap: nowrap; white-space: nowrap; line-height: 1; }
  .ds-promo-off { color: #ffa94d; font-weight: 700; }
  .ds-promo-use { color: rgba(253,252,250,0.88); }
  .ds-promo-chip {
    display: inline-flex; align-items: center; gap: 6px; height: 26px; padding: 0 10px;
    border: 1px dashed #ffa94d; border-radius: 6px; background: rgba(255,255,255,0.08);
    color: #fdfcfa; font: inherit; font-weight: 700; letter-spacing: 0.04em; cursor: pointer;
  }
  .ds-promo-chip:hover { background: rgba(255,255,255,0.16); }
  .ds-promo-chip[data-copied] { border-style: solid; background: rgba(255,169,77,0.18); }
  .ds-promo-chip[data-copied] .ds-promo-code, .ds-promo-chip[data-copied] .ds-promo-ghost { display: none; }
  .ds-promo-copied:empty { display: none; }
  .ds-promo-copied { color: #ffa94d; }
  .ds-promo-ghost { color: #e9e3f5; animation: ds-promo-float 5s ease-in-out infinite; }
  .ds-promo-pumpkin { flex: none; }
  .ds-promo-link { color: #fdfcfa; font-weight: 600; text-decoration: underline; text-underline-offset: 3px; margin-left: 4px; }
  .ds-promo-link:hover { color: #ffa94d; }
  .ds-promo-fine { color: rgba(253,252,250,0.78); font-size: 11.5px; margin-left: 4px; }
  .ds-promo-close {
    position: absolute; right: calc(var(--ds-ledger-gutter, 48px) - 8px); top: 50%; transform: translateY(-50%);
    width: 32px; height: 32px; display: grid; place-items: center; border: 0; border-radius: 6px;
    background: transparent; color: #fdfcfa; cursor: pointer;
  }
  .ds-promo-close:hover { background: rgba(255,255,255,0.12); }
  .ds-promo :focus-visible { outline: 2px solid #ffa94d; outline-offset: 2px; }
  .ds-promo-web { position: absolute; top: 0; width: 38px; height: 38px; color: rgba(233,227,245,0.22); }
  .ds-promo-web--l { left: 0; }
  .ds-promo-web--r { right: 0; transform: scaleX(-1); }
  .ds-promo-bat { position: absolute; top: 9px; left: -30px; width: 20px; color: #0b0614; opacity: 0.9;
    animation: ds-promo-glide 38s ease-in-out infinite; }
  .ds-promo-bat--b { top: 22px; width: 14px; animation-duration: 52s; animation-delay: -20s; }
  @keyframes ds-promo-glide {
    0% { transform: translate(0, 0); } 50% { transform: translate(60vw, 5px); } 100% { transform: translate(calc(100vw + 60px), -2px); }
  }
  @keyframes ds-promo-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-1.5px); } }
  @media (max-width: 760px) {
    .ds-promo-fine, .ds-promo-use, .ds-promo-pumpkin, .ds-promo-link { display: none; }
    .ds-promo { font-size: 12.5px; }
    .ds-promo-inner { padding: 0 40px 0 12px; gap: 6px; justify-content: flex-start; }
    .ds-promo-text { gap: 6px; }
    .ds-promo-close { right: 4px; }
    .ds-promo-off { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; min-width: 0; }
  }
  @media (max-width: 760px) { .ds-promo-text { min-width: 0; } }
  @media (prefers-reduced-motion: reduce) {
    .ds-promo-bat, .ds-promo-ghost { animation: none; }
    .ds-promo-bat { left: 70%; }
  }
  /* AI-referral banner: calm slate/teal-neutral, no motion. Hidden unless html[data-ai="on"]. */
  .ds-promo--ai { display: none; background: #14202b; color: #f4f7f9; }
  :root[data-ai='on'] { --ds-promo-h: 40px; }
  :root[data-ai='closed'] { --ds-promo-h: 0px; }
  :root[data-ai='on'] .ds-promo--ai { display: block; }
  :root[data-ai='on'] .ds-promo--oct, :root[data-ai='closed'] .ds-promo--oct, :root[data-ai='closed'] .ds-promo--ai { display: none; }
  .ds-promo--ai .ds-promo-off { color: #f4f7f9; }
  .ds-promo--ai .ds-promo-chip { border-color: rgba(244,247,249,0.6); }
  .ds-promo--ai .ds-promo-chip[data-copied] { background: rgba(244,247,249,0.16); }
  .ds-promo--ai .ds-promo-copied { color: #f4f7f9; }
  .ds-promo--ai .ds-promo-link:hover { color: #cfe3ee; }
  .ds-promo--ai :focus-visible { outline-color: #f4f7f9; }
  @media (max-width: 760px) { .ds-promo--ai .ds-ai-use:last-of-type { display: inline; } .ds-promo--ai .ds-promo-text { font-size: 12px; gap: 5px; } }