/* The compatibility marquee: one sliding band between the hero and the band
 * below, saying who the gateway speaks to.
 *
 * Adapted from systemprompt-web's `deploy-marquee` — same mechanics: a track of
 * four identical groups sliding -25% for a seamless loop, edge-masked so names
 * enter and leave as light rather than popping at a hard edge, paused on hover
 * and focus, and static (single group, wrapped) under reduced motion.
 *
 * Items are spans, not links: this band states compatibility, it does not
 * endorse or send traffic. Colours are the stage tokens declared on
 * `body.home-split-body` in home-stage.css, so the band cannot drift from the
 * glass panes above it. */

.compat-marquee {
  position: relative;
  overflow: hidden;
  padding: var(--sp-space-4) 0;
  border-top: 1px solid var(--sp-stage-glass-border);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 6%, black 94%, transparent);
  mask-image: linear-gradient(90deg, transparent, black 6%, black 94%, transparent);
}

.compat-marquee-track {
  display: flex;
  width: max-content;
  animation: compat-marquee-scroll 40s linear infinite;
}

.compat-marquee:hover .compat-marquee-track,
.compat-marquee:focus-within .compat-marquee-track {
  animation-play-state: paused;
}

.compat-marquee-group {
  display: flex;
  align-items: center;
  gap: var(--sp-space-8);
  padding-right: var(--sp-space-8);
  white-space: nowrap;
}

.compat-marquee-label {
  font-family: var(--sp-font-brand, inherit);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--sp-stage-glow);
}

/* Items link out to the thing they name. They dress as quiet text, not as
   links — the underline would draw fifty-six lines across the band. */
.compat-marquee-item {
  display: inline-flex;
  align-items: center;
  gap: var(--sp-space-2);
  font-family: var(--sp-font-brand, inherit);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--sp-stage-text-dim);
  text-decoration: none;
  opacity: 0.85;
}

.compat-marquee-item:hover,
.compat-marquee-item:focus-visible {
  color: var(--sp-stage-text);
  opacity: 1;
}

/* Third-party marks arrive in their own colours and proportions; the band
   wants one voice and one optical size. Flattened to the stage's light ink,
   boxed to the same square so differing viewBoxes still sit inline. */
.compat-marquee-logo {
  width: 1.5rem;
  height: 1.5rem;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.8;
}

/* A quiet divider between the agents and the providers, so the one band reads
   as two lists rather than a soup. */
.compat-marquee-sep {
  width: 1px;
  height: 1rem;
  background: var(--sp-stage-glass-border);
}

@keyframes compat-marquee-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-25%); }
}

@media (prefers-reduced-motion: reduce) {
  .compat-marquee-track {
    animation: none;
    width: auto;
    flex-wrap: wrap;
    justify-content: center;
  }

  .compat-marquee-group[aria-hidden="true"] {
    display: none;
  }

  .compat-marquee-group {
    flex-wrap: wrap;
    justify-content: center;
    padding: 0 var(--sp-space-4);
    white-space: normal;
    row-gap: var(--sp-space-2);
  }
}