.fsqr-tooltip {
  --fsqr-tooltip-bg: rgba(15, 23, 42, 0.96);
  --fsqr-tooltip-color: #f8fafc;
  --fsqr-tooltip-border: rgba(148, 163, 184, 0.42);
  --fsqr-tooltip-arrow-left: 50%;
  position: fixed;
  z-index: 2147483647;
  pointer-events: none;
  max-width: min(320px, calc(100vw - 20px));
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--fsqr-tooltip-border);
  border-radius: 10px;
  background: var(--fsqr-tooltip-bg);
  color: var(--fsqr-tooltip-color);
  font-size: 0.82rem;
  line-height: 1.45;
  letter-spacing: 0.01em;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.28);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity 120ms ease, transform 120ms ease;
}

.fsqr-tooltip.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.fsqr-tooltip[hidden] {
  display: none;
}

.fsqr-tooltip::after {
  content: "";
  position: absolute;
  left: var(--fsqr-tooltip-arrow-left);
  transform: translateX(-50%);
  border: 6px solid transparent;
}

.fsqr-tooltip[data-placement="top"]::after {
  top: 100%;
  border-top-color: var(--fsqr-tooltip-bg);
}

.fsqr-tooltip[data-placement="bottom"]::after {
  bottom: 100%;
  border-bottom-color: var(--fsqr-tooltip-bg);
}

@media (prefers-reduced-motion: reduce) {
  .fsqr-tooltip {
    transition: none;
  }
}