/*
 * Back to Top — drop-in scroll-to-top button.
 *
 * Side, offset, size, and shape are all configurable via meta attrs:
 *   data-position="left|right"  (class toggle)
 *   data-offset-x / data-offset-y  (--aed-btt-offset-x/y)
 *   data-size                      (--aed-btt-size, px)
 *   data-style="circle|square|pill"  (class toggle)
 *
 * See /back-to-top/README.md.
 */

.aed-btt {
  --aed-btt-offset-x: 1.5rem;
  --aed-btt-offset-y: 1.5rem;
  --aed-btt-size: 44px;
  --aed-btt-radius: 50%;
  position: fixed;
  bottom: var(--aed-btt-offset-y);
  z-index: 7600; /* above social-proof, below contact-fab panel + consent */
  width: var(--aed-btt-size);
  height: var(--aed-btt-size);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card, #18181b);
  color: var(--text-secondary, #a1a1aa);
  border: 1px solid var(--border, #27272a);
  border-radius: var(--aed-btt-radius);
  box-shadow: 0 8px 22px -8px rgba(0, 0, 0, 0.35);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px) scale(0.95);
  transition:
    opacity 0.2s ease,
    transform 0.22s cubic-bezier(0.4, 0, 0.2, 1),
    background 0.15s ease,
    color 0.15s ease,
    border-color 0.15s ease;
}

/* Side placement */
.aed-btt-left  { left: var(--aed-btt-offset-x); }
.aed-btt-right { right: var(--aed-btt-offset-x); }

/* Shape variants */
.aed-btt-circle { --aed-btt-radius: 50%; }
.aed-btt-square { --aed-btt-radius: 8px; }
.aed-btt-pill   {
  --aed-btt-radius: 999px;
  width: auto;
  padding: 0 0.9rem;
  min-width: var(--aed-btt-size);
}
.aed-btt-pill::after {
  content: "Top";
  font: inherit;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-left: 0.35rem;
}

.aed-btt.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0) scale(1);
}
.aed-btt:hover {
  color: var(--accent, #6B00FF);
  border-color: var(--accent, #6B00FF);
  background: color-mix(in srgb, var(--accent, #6B00FF) 8%, var(--bg-card, #18181b));
}
.aed-btt svg { width: calc(var(--aed-btt-size) * 0.41); height: calc(var(--aed-btt-size) * 0.41); }

/* Slide up out of the way of the consent banner */
body:has(.consent-banner.is-open) .aed-btt,
body:has(.consent-banner.is-open) .aed-btt.is-visible {
  transform: translateY(-86px);
}

/* Hide on mobile if the lead-bar is active (full-width strip would overlap) */
@media (max-width: 640px) {
  body.aed-leadbar-active .aed-btt { display: none !important; }
  .aed-btt {
    --aed-btt-offset-x: 1rem;
    --aed-btt-offset-y: 1rem;
    --aed-btt-size: 40px;
  }
}

/* Hide on mobile if social-proof toast is at the same edge */
@media (max-width: 640px) {
  body:has(.aed-sp-toast.is-open) .aed-btt,
  body:has(.aed-sp-toast.is-open) .aed-btt.is-visible {
    transform: translateY(-72px);
  }
}

@media print {
  .aed-btt { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  .aed-btt { transition: opacity 0.18s ease; transform: none !important; }
  body:has(.consent-banner.is-open) .aed-btt,
  body:has(.consent-banner.is-open) .aed-btt.is-visible { transform: none !important; }
}