/* Math-quiz mode: quiz overlay + board markers. Loaded after shared styles.css. */

.legend-badge--quiz {
  background: var(--quiz);
}

.cell[data-quiz="true"] {
  padding-bottom: 1.1rem;
}

.cell[data-quiz="true"]::after {
  position: absolute;
  right: 0.28rem;
  bottom: 0.22rem;
  content: "?";
  font-size: clamp(0.48rem, 1.2vw, 0.62rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1;
  padding: 0.18rem 0.28rem;
  border-radius: 4px;
  color: var(--on-accent);
  background: var(--quiz);
}

.quiz-overlay {
  z-index: 30;
}

.quiz-card {
  width: min(420px, calc(100% - 2rem));
  padding: 1.85rem 1.7rem 1.55rem;
  border-radius: 28px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(31, 58, 58, 0.08);
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(255, 255, 255, 0.55), transparent 55%),
    var(--foam);
  text-align: center;
  position: relative;
  overflow: hidden;
  animation: quiz-rise 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.quiz-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 7px;
  background: var(--quiz);
}

.quiz-player {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.quiz-prompt {
  margin: 0.7rem 0 1.2rem;
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--quiz);
  line-height: 1.1;
}

.quiz-choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.65rem;
}

.quiz-choice {
  padding: 0.85rem 0.75rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.quiz-choice:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: var(--quiz);
  background: rgba(255, 255, 255, 0.95);
}

.quiz-choice:focus-visible {
  outline: 2px solid var(--quiz);
  outline-offset: 2px;
}

.quiz-choice:disabled {
  cursor: default;
}

.quiz-choice.is-selected {
  border-color: var(--quiz);
  background: rgba(61, 111, 159, 0.12);
}

.quiz-feedback {
  margin: 1rem 0 0;
  font-size: 0.95rem;
  font-weight: 600;
}

.quiz-feedback[data-result="correct"] {
  color: var(--accent-deep);
}

.quiz-feedback[data-result="wrong"] {
  color: var(--snake);
}

@keyframes quiz-rise {
  0% {
    opacity: 0;
    transform: translateY(16px) scale(0.96);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (prefers-reduced-motion: reduce) {
  .quiz-card { animation: none; }
}