deepseek-harness/packages/client/ui-primitives/src/Toast.module.css

/* Transient top-center banner (DeepSeek Chat toast look): contrast fill,
   inverted label, slide-in, then hold-and-fade. The fade delay/duration MUST
   agree with HOLD_MS/FADE_MS in Toast.tsx: the component unmounts at their
   sum, so a mismatched sheet either cuts the fade or leaves an invisible
   banner blocking nothing. */

.toast {
  position: fixed;
  top: 120px;
  left: 50%;
  /* Above the 1000 the image lightbox backdrop uses: a failure reported while
     a preview is open must stay readable. */
  z-index: 1100;
  /* Purely an announcement: it must never intercept clicks — in particular
     after the CSS fade finished while a throttled background-tab timer has
     not yet unmounted the still-hit-testable fixed element. */
  pointer-events: none;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: min(560px, calc(100vw - 48px));
  padding: 12px 16px;
  border-radius: 14px;
  background: var(--dsw-alias-button-contrast-fill);
  color: var(--dsw-alias-label-primary-inverted);
  font-size: 14px;
  line-height: 22px;
  box-shadow: var(--dsw-shadow-lv3);
  transform: translateX(-50%);
  animation:
    dsh-toast-in 160ms ease-out,
    dsh-toast-fade 1000ms ease 3000ms forwards;
}

.icon {
  display: grid;
  place-items: center;
  flex: none;
  color: var(--dsw-alias-state-warn-label);
}

.text {
  min-width: 0;
}

@keyframes dsh-toast-in {
  from {
    opacity: 0;
    transform: translate(-50%, -6px);
  }

  to {
    opacity: 1;
    transform: translate(-50%, 0);
  }
}

@keyframes dsh-toast-fade {
  to {
    opacity: 0;
  }
}

/* Reduced motion drops the slide-in; the delayed fade (an opacity change,
   not movement) still ends the banner before the timed unmount. */
@media (prefers-reduced-motion: reduce) {
  .toast {
    animation: dsh-toast-fade 1000ms ease 3000ms forwards;
  }
}