.quiz-container,
.challenge-container {
  background-color: white;
  padding: 25px;
  border-radius: 25px;
  box-shadow: 0 10px 20px rgb(0 0 0 / 0.1);
  max-width: 800px;
  margin: 0 auto;
  border: 4px solid #ffc6dd;
  background-image: linear-gradient(to bottom, #ffffff, #fff9fb);
}
.question {
  font-size: 1.5em;
  font-weight: bold;
  margin: 20px auto;
  padding: 15px;
  background-color: #f5f5f5;
  border-radius: 8px;
  text-align: center;
  color: #333;
  max-width: 600px;
}
.theme-dark .question {
  background-color: #2c3e50;
  color: #ecf0f1;
  border: 2px solid #3498db;
}
.options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 20px auto;
  max-width: 650px;
}
.option {
  background-color: #f1f1f1;
  border: none;
  padding: 15px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 1em;
  min-height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
  text-align: center;
}
.option:hover {
  background-color: #e0e0e0;
  transform: translateY(-2px);
  box-shadow: 0 2px 5px rgb(0 0 0 / 0.1);
}
.feedback {
  min-height: 50px;
  margin: 20px 0;
  padding: 10px;
  border-radius: 5px;
  text-align: center;
}
.feedback.correct {
  will-change: transform;
  color: white;
  background-color: var(--secondary-color);
  background-image: linear-gradient(45deg, var(--secondary-color), var(--secondary-dark));
  border-radius: 15px;
  box-shadow: 0 6px 12px rgb(0 0 0 / 0.1);
  animation: feedback-pop 0.5s;
}
.feedback.incorrect {
  will-change: transform;
  color: white;
  background-color: var(--danger-color);
  background-image: linear-gradient(45deg, var(--danger-color), var(--danger-dark));
  border-radius: 15px;
  box-shadow: 0 6px 12px rgb(0 0 0 / 0.1);
  animation: feedback-pop 0.5s;
}
@keyframes feedback-pop {
  0% {
    transform: scale(0.9);
    opacity: 0.5;
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}
.quiz-stats,
.challenge-stats {
  background-color: rgb(255 255 255 / 0.8);
  padding: 12px 15px;
  border-radius: 10px;
  margin: 15px 0;
  display: flex;
  justify-content: space-around;
  box-shadow: 0 2px 4px rgb(0 0 0 / 0.1);
}
.input-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  margin: 15px auto;
  width: 100%;
  max-width: 500px;
}
.answer-display {
  background-color: #fff;
  min-height: 50px;
  width: 80%;
  max-width: 300px;
  border: 3px solid #bdc3c7;
  border-radius: 15px;
  font-size: 1.5em;
  font-weight: bold;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 10px;
  box-shadow: inset 0 2px 5px rgb(0 0 0 / 0.1);
  color: #2c3e50;
}
.numpad-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  width: 90%;
  max-width: 350px;
  margin: 10px auto 0;
}
.numpad-btn {
  background-color: #ecf0f1;
  border: 2px solid #bdc3c7;
  border-radius: 10px;
  font-size: 1.3em;
  font-weight: bold;
  padding: 10px;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 3px 6px rgb(0 0 0 / 0.1);
  flex: 1 1 28%;
  min-width: 50px;
  text-align: center;
}
.numpad-btn:hover,
.numpad-btn:active {
  background-color: #d6eaf8;
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgb(0 0 0 / 0.15);
}
.numpad-btn.delete-btn {
  background-color: #e74c3c;
  border-color: #c0392b;
  color: white;
}
.numpad-container .validate-btn {
  flex: 1 1 100%;
  margin-top: 10px;
  padding: 12px;
  font-size: 1.1em;
  min-height: 45px;
}
.hint {
  background-color: #fff3cd;
  background-image: linear-gradient(45deg, #fff3cd, #ffe0a3);
  padding: 12px;
  border-radius: 15px;
  margin-top: 15px;
  font-size: 1em;
  color: #8c6bac;
  box-shadow: 0 4px 8px rgb(0 0 0 / 0.05);
  border: 2px solid #ffd789;
}
.options:has(.input-group) {
  display: flex;
  justify-content: center;
  grid-template-columns: none;
}
@media (max-width: 600px) {
  .numpad-container {
    gap: 5px;
    width: 90%;
    max-width: 250px;
  }
  .numpad-btn {
    font-size: 20px;
    padding: 12px;
    border-radius: 10px;
    min-height: 45px;
  }
  .validate-btn {
    width: 90%;
    max-width: 250px;
    font-size: 16px;
    padding: 10px;
  }
  .answer-display {
    font-size: 20px;
    min-height: 40px;
    width: 90%;
    max-width: 250px;
  }
}
.feedback-number-line-container {
  position: relative;
  margin: 15px auto 10px;
  padding: 15px 15px 30px 15px;
  background-color: rgb(255 255 255 / 0.2);
  border-radius: 8px;
  max-width: 90%;
  box-sizing: border-box;
}
.feedback-number-line-container h4 {
  text-align: center;
  margin-bottom: 15px;
  font-size: 0.9em;
  color: inherit;
}
.feedback-number-line {
  position: relative;
  width: 95%;
  height: 30px;
  margin: 25px auto 5px;
  background-color: transparent;
  border: none;
}
.feedback-number-line .line {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 10px;
  height: 2px;
  background-color: currentColor;
  opacity: 0.7;
}
.feedback-number-line .tick {
  position: absolute;
  bottom: 8px;
  width: 1px;
  height: 5px;
  background-color: currentColor;
  transform: translateX(-0.5px);
}
.feedback-number-line .tick .label {
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.8em;
  color: inherit;
  white-space: nowrap;
}
.feedback-number-line .arc {
  will-change: transform;
  position: absolute;
  bottom: 10px;
  border: 1px solid currentColor;
  opacity: 0.8;
  border-top-left-radius: 50px;
  border-top-right-radius: 50px;
  border-bottom: none;
  box-sizing: border-box;
  transform-origin: bottom center;
  animation: draw-arc 0.5s ease-out forwards;
  animation-delay: calc(var(--arc-index) * 0.1s + 0.2s);
  transform: scaleY(0);
}
.feedback-number-line .arc-label {
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.7em;
  color: inherit;
  background-color: transparent;
  padding: 0 2px;
  white-space: nowrap;
}
@keyframes draw-arc {
  to {
    transform: scaleY(1);
  }
}
.quiz-filter {
  background-color: white;
  padding: 15px;
  border-radius: 10px;
  margin: 10px 0;
  box-shadow: 0 2px 4px rgb(0 0 0 / 0.1);
}
.filter-toggle {
  background-color: var(--primary-color);
  color: var(--text-color);
}
.theme-dark .filter-toggle {
  background-color: var(--primary-dark);
  color: var(--text-color);
}
.exclude-btn {
  background-color: var(--neutral-light);
  color: var(--text-color);
}
.theme-dark .exclude-btn {
  background-color: var(--neutral-medium);
  color: var(--text-color);
}
.filter-info {
  font-size: 0.9em;
  margin-bottom: 5px;
  color: var(--text-color);
}
.filter-toggle {
  background-color: #f1f1f1;
  border: none;
  border-radius: 5px;
  padding: 5px 10px;
  cursor: pointer;
  font-size: 1em;
  margin-left: 10px;
  transition:
    background-color 0.3s,
    transform 0.2s;
}
.filter-toggle:hover {
  background-color: #e0e0e0;
}
.exclude-table-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(40px, 1fr));
  gap: 5px;
  margin: 10px 0;
}
.exclude-btn {
  background-color: #ecf0f1;
  border: 1px solid #bdc3c7;
  border-radius: 5px;
  padding: 8px;
  cursor: pointer;
  text-align: center;
  transition:
    background-color 0.3s,
    color 0.3s;
}
.exclude-btn.selected {
  background-color: var(--primary-color);
  color: white;
  border-color: var(--primary-dark);
}
#apply-filters-btn {
  margin-top: 10px;
}
#quiz-abandon {
  margin: 5px;
}
.quiz-actions {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 20px;
  width: 90%;
  max-width: 350px;
  margin-left: auto;
  margin-right: auto;
}
.quiz-actions .btn {
  flex: 1;
}