/* คิดเลข (flash math quiz) — tab in the เกม hub */

.math-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 0;
  padding: 16px 20px calc(var(--safe-bottom) + 16px);
  align-items: center;
  gap: 14px;
}

.math-score-row {
  display: flex;
  justify-content: space-between;
  width: 100%;
  max-width: 320px;
  font-size: 12px;
  color: var(--sub);
}

.math-score-row b {
  color: var(--text);
  font-size: 15px;
}

.math-board-wrap {
  position: relative;
  width: 100%;
  max-width: 320px;
  flex: 1;
  min-height: 220px;
  display: flex;
}

.math-stage {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 20px;
}

.math-prompt,
.math-question,
.math-answer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  width: 100%;
}

.math-prompt-title {
  font-size: 20px;
  font-weight: 800;
}

.math-prompt-sub {
  font-size: 13px;
  color: var(--sub);
  max-width: 240px;
}

.math-mode-row,
.math-choice-count-row,
.math-level-row,
.math-ops-row,
.math-terms-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: center;
}

.math-mode-btn,
.math-choice-count-btn,
.math-level-btn,
.math-ops-btn,
.math-terms-btn {
  background: var(--card-hi);
  border: none;
  color: var(--sub);
  border-radius: var(--radius-pill);
  padding: 8px 16px;
  font-size: 12.5px;
  font-weight: 700;
  cursor: pointer;
}

.math-mode-btn.active,
.math-choice-count-btn.active,
.math-level-btn.active,
.math-ops-btn.active,
.math-terms-btn.active {
  background: var(--accent);
  color: #fff;
}

.math-choice-count-label,
.math-level-label,
.math-ops-label,
.math-terms-label {
  font-size: 12px;
  color: var(--sub);
}

.math-choice-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  max-width: 260px;
}

.math-choice-btn {
  min-width: 64px;
  background: var(--card-hi);
  border: none;
  color: var(--text);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  font-size: 18px;
  font-weight: 700;
  cursor: pointer;
}

.math-question-countdown {
  font-size: 13px;
  color: var(--sub);
  font-weight: 700;
}

.math-question-text {
  font-size: clamp(20px, 7vw, 34px);
  font-weight: 800;
  letter-spacing: 0.02em;
  word-break: break-word;
  text-align: center;
}

.math-answer-countdown {
  font-size: 13px;
  color: var(--sub);
  font-weight: 700;
}

.math-answer-input {
  width: 140px;
  background: var(--card-hi);
  border: none;
  border-radius: var(--radius-md);
  color: var(--text);
  font-size: 22px;
  font-weight: 700;
  text-align: center;
  padding: 10px;
}

.math-answer-actions {
  display: flex;
  gap: 10px;
}

.math-answer-btn,
.math-giveup-btn {
  border: none;
  border-radius: var(--radius-pill);
  padding: 10px 20px;
  font-size: 13.5px;
  font-weight: 700;
  cursor: pointer;
}

.math-answer-btn {
  background: var(--accent);
  color: #fff;
}

.math-giveup-btn {
  background: var(--card-hi);
  color: var(--sub);
}

.math-flash {
  font-size: 22px;
  font-weight: 800;
  color: var(--green);
}

.math-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: rgba(0, 0, 0, 0.55);
  border-radius: var(--radius-lg);
  text-align: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) ease;
}

.math-overlay.show {
  opacity: 1;
  pointer-events: auto;
}

.math-overlay-title {
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
}

.math-overlay-sub {
  font-size: 13px;
  color: var(--sub);
  max-width: 260px;
}

.math-overlay-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 4px;
}

.math-overlay-actions .math-start-btn {
  margin-top: 0;
}

.math-start-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  font-size: 14.5px;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  cursor: pointer;
  margin-top: 4px;
}