/* The drawing, answers and result each keep their own space in every state. */
.angle-lesson > .angle-quiz-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto auto 56px 72px;
  gap: 12px;
  height: auto;
  min-width: 0;
  padding: 18px;
  align-content: stretch;
}
.angle-question-header { min-width: 0; }
.angle-quiz-panel .quiz-progress { margin: 0 auto 10px; }
.angle-quiz-panel .quiz-question {
  margin: 0;
  font-size: clamp(19px, 1.6vw, 24px);
  line-height: 1.5;
}
.angle-quiz-panel .challenge-rule {
  width: fit-content;
  max-width: 100%;
  margin: 0 auto 8px;
}
.angle-diagram-stage { position: relative; min-width: 0; min-height: 0; aspect-ratio: 420 / 225; }
.angle-diagram-stage:has(.combined-protractor) { aspect-ratio: 460 / 450; }
.angle-lesson .angle-diagram-stage .protractor {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  margin: 0;
  object-fit: contain;
}
.angle-quiz-panel .answers {
  width: 100%;
  max-width: 650px;
  height: 56px;
  margin: 0 auto;
  gap: 10px;
}
.angle-quiz-panel .answer-button {
  min-width: 0;
  min-height: 56px;
  padding: 6px;
  font-size: clamp(24px, 2vw, 30px);
  line-height: 1.2;
  touch-action: manipulation;
}
.angle-result-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  width: 100%;
  max-width: 650px;
  height: 72px;
  margin: 0 auto;
}
.angle-result-slot { display: grid; place-items: center; min-width: 0; }
.angle-result {
  display: block;
  color: #288042;
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 900;
  line-height: 1.3;
  white-space: nowrap;
  text-shadow: 0 2px #fff;
}
.angle-result.correct { animation: angle-correct-pop .5s cubic-bezier(.2,.8,.25,1) both; }
.angle-result.incorrect { color: #a65828; animation: angle-try-again .4s ease-out both; }
.angle-result-row .game-button {
  width: 100%;
  min-height: 56px;
  padding: 8px 12px;
  font-size: clamp(20px, 1.8vw, 26px);
  line-height: 1.25;
  touch-action: manipulation;
}
@keyframes angle-correct-pop {
  0% { opacity: 0; transform: scale(.65); }
  65% { opacity: 1; transform: scale(1.12); }
  100% { opacity: 1; transform: scale(1); }
}
@keyframes angle-try-again {
  0% { opacity: 0; transform: translateX(-8px); }
  30% { opacity: 1; transform: translateX(6px); }
  60% { transform: translateX(-3px); }
  100% { opacity: 1; transform: translateX(0); }
}
@media (min-width: 900px) {
  .angle-lesson { height: calc(100dvh - 156px); }
  .angle-lesson > .angle-quiz-panel { grid-template-rows: auto minmax(0, 1fr) 56px 72px; height: 100%; min-height: 0; padding: 16px; }
  .angle-quiz-panel .angle-diagram-stage { aspect-ratio: auto; }
}
/* On short laptops, keep the two semicircles large beside the answer buttons. */
@media (min-width: 900px) and (max-height: 740px) {
  .angle-lesson > .angle-quiz-panel:has(.combined-protractor) {
    grid-template-columns: minmax(0, 1fr) 160px;
    grid-template-rows: auto minmax(180px, 1fr) 112px;
    padding: 12px;
  }
  .angle-quiz-panel:has(.combined-protractor) .angle-question-header { grid-column: 1 / -1; }
  .angle-quiz-panel:has(.combined-protractor) .angle-diagram-stage { grid-row: 2 / 4; }
  .angle-quiz-panel:has(.combined-protractor) .answers {
    grid-column: 2;
    grid-template-columns: 1fr;
    grid-template-rows: repeat(3, minmax(56px, 1fr));
    height: 100%;
  }
  .angle-quiz-panel:has(.combined-protractor) .angle-result-row {
    grid-column: 2;
    grid-template-columns: 1fr;
    grid-template-rows: 40px 56px;
    gap: 8px;
    height: 112px;
  }
  .angle-quiz-panel:has(.combined-protractor) .angle-result { font-size: 28px; }
  .angle-quiz-panel:has(.combined-protractor) .angle-result-row .game-button { font-size: 20px; }
}
@media (max-width: 480px) {
  .angle-lesson > .angle-quiz-panel { padding: 14px 10px; gap: 10px; }
  .angle-quiz-panel .quiz-question { font-size: 19px; }
  .angle-result-row { gap: 10px; }
  .angle-result-row .game-button { padding: 8px 4px; font-size: 20px; }
}
@media (prefers-reduced-motion: reduce) {
  .angle-result.correct, .angle-result.incorrect { animation: none; }
}