.learnstack-test-placeholder {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.55);
  border-radius: 18px;
  background:
    repeating-linear-gradient(0deg, transparent 0 28px, rgba(148, 163, 184, 0.08) 29px 30px),
    linear-gradient(135deg, rgba(248, 250, 252, 0.96), rgba(241, 245, 249, 0.88));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.78), 0 12px 28px rgba(15, 23, 42, 0.06);
  padding: 14px;
}

.learnstack-test-placeholder::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 14% 12%, rgba(44, 191, 174, 0.12), transparent 28%),
    radial-gradient(circle at 92% 18%, rgba(47, 62, 115, 0.1), transparent 24%);
}

.learnstack-test-placeholder::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.74), transparent);
  transform: translateX(-120%);
  animation: learnstack-placeholder-sweep 2.8s ease-in-out infinite;
  pointer-events: none;
}

.learnstack-test-placeholder-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}

.learnstack-test-placeholder-chip,
.learnstack-test-placeholder-score,
.learnstack-test-placeholder-number,
.learnstack-test-placeholder-question,
.learnstack-test-placeholder-answer {
  display: block;
  border: 1px solid rgba(148, 163, 184, 0.42);
  background: rgba(226, 232, 240, 0.62);
}

.learnstack-test-placeholder-chip {
  width: min(42%, 12rem);
  height: 16px;
  border-radius: 999px;
}

.learnstack-test-placeholder-score {
  width: 52px;
  height: 22px;
  border-radius: 999px;
}

.learnstack-test-placeholder-lines {
  display: grid;
  gap: 9px;
}

.learnstack-test-placeholder-row {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr) minmax(72px, 0.3fr);
  align-items: center;
  gap: 10px;
  min-height: 42px;
  border: 1px solid rgba(148, 163, 184, 0.44);
  border-radius: 13px;
  background: rgba(255, 255, 255, 0.62);
  padding: 9px 10px;
  animation: learnstack-placeholder-breathe 2.2s ease-in-out infinite;
}

.learnstack-test-placeholder-number {
  width: 22px;
  height: 22px;
  border-radius: 50%;
}

.learnstack-test-placeholder-question,
.learnstack-test-placeholder-answer {
  height: 12px;
  border-radius: 999px;
}

.learnstack-test-placeholder-answer {
  justify-self: end;
  width: min(100%, 6.8rem);
}

@keyframes learnstack-placeholder-sweep {
  0% {
    transform: translateX(-120%);
    opacity: 0;
  }

  28%,
  64% {
    opacity: 0.72;
  }

  100% {
    transform: translateX(120%);
    opacity: 0;
  }
}

@keyframes learnstack-placeholder-breathe {
  0%,
  100% {
    border-color: rgba(148, 163, 184, 0.4);
    opacity: 0.76;
  }

  50% {
    border-color: rgba(100, 116, 139, 0.62);
    opacity: 1;
  }
}

@media (max-width: 520px) {
  .learnstack-test-placeholder-row {
    grid-template-columns: 22px minmax(0, 1fr);
  }

  .learnstack-test-placeholder-answer {
    grid-column: 2;
    justify-self: stretch;
    width: 48%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .learnstack-test-placeholder::after,
  .learnstack-test-placeholder-row {
    animation: none;
  }
}