/* AcidBase Mastery — Quiz Styles */

/* Quiz setup mode cards */
.quiz-modes {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-bottom: 3rem;
}

.mode-card {
  padding: 2.5rem 2rem;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.mode-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--accent));
  transform: scaleX(0) translateZ(0);
  transform-origin: left center;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.mode-card:hover::before,
.mode-card.selected::before {
  transform: scaleX(1) translateZ(0);
}

.mode-card:hover {
  background: var(--surface-hover);
  transform: translateY(-4px);
}

.mode-card.selected {
  border-color: var(--teal);
  background: rgba(90, 138, 135, 0.08);
}

.mode-card .card-number {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
}

.mode-card .card-title {
  font-size: 1.4rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
}

.mode-card .card-desc {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text);
  opacity: 0.6;
}

/* Topic picker */
.topic-picker {
  margin-bottom: 3rem;
}

.topic-picker-label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
  display: block;
}

.topic-select {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  padding: 0.8rem 1rem;
  border: 1px solid var(--surface-border);
  background: rgba(13, 12, 10, 0.5);
  color: var(--text);
  outline: none;
  width: 100%;
  max-width: 500px;
  transition: border-color 0.3s ease;
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%234a4845'%3E%3Cpath d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
}

.topic-select:focus {
  border-color: var(--teal);
}

.topic-select option {
  background: #0d0c0a;
  color: var(--text);
}

.quiz-start-row {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* Quiz header / progress */
.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--surface-border);
}

.quiz-progress-info {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

.quiz-progress-info strong {
  color: var(--teal);
}

.quiz-timer {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.quiz-timer.warning {
  color: var(--coral);
}

.quiz-progress-bar {
  width: 100%;
  height: 2px;
  background: var(--surface-border);
  margin-bottom: 3rem;
  position: relative;
}

.quiz-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--teal), var(--accent));
  transition: width 0.4s ease;
}

/* Problem card */
.problem-card {
  margin-bottom: 2rem;
}

.problem-difficulty {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.problem-topic-tag {
  font-family: var(--font-mono);
  font-size: 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.2rem 0.5rem;
  border: 1px solid rgba(90, 138, 135, 0.2);
  color: var(--teal);
  display: inline-block;
  margin-bottom: 1rem;
}

.problem-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text);
  margin-bottom: 2rem;
  max-width: 700px;
}

/* Multiple choice options */
.choices-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-width: 600px;
}

.choice-option {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem 1.25rem;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.9rem;
  line-height: 1.6;
}

.choice-option:hover {
  border-color: rgba(90, 138, 135, 0.3);
  background: var(--surface-hover);
}

.choice-option.selected {
  border-color: var(--teal);
  background: rgba(90, 138, 135, 0.08);
}

.choice-option.correct {
  border-color: var(--correct);
  background: rgba(90, 138, 106, 0.08);
}

.choice-option.incorrect {
  border-color: var(--incorrect);
  background: rgba(184, 122, 106, 0.08);
}

.choice-option.disabled {
  pointer-events: none;
  opacity: 0.7;
}

.choice-option.disabled.selected:not(.correct) {
  opacity: 1;
}

.choice-letter {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--surface-border);
  flex-shrink: 0;
  margin-top: 2px;
  transition: all 0.3s ease;
}

.choice-option.selected .choice-letter {
  border-color: var(--teal);
  color: var(--teal);
}

.choice-option.correct .choice-letter {
  border-color: var(--correct);
  background: var(--correct);
  color: var(--bg);
}

.choice-option.incorrect .choice-letter {
  border-color: var(--incorrect);
  background: var(--incorrect);
  color: var(--bg);
}

.choice-text {
  flex: 1;
  color: var(--text);
}

/* Numerical input */
.numerical-input-group {
  display: flex;
  align-items: center;
  gap: 1rem;
  max-width: 400px;
}

.numerical-input {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.05em;
  padding: 0.8rem 1rem;
  border: 1px solid var(--surface-border);
  background: rgba(13, 12, 10, 0.5);
  color: var(--text);
  outline: none;
  width: 200px;
  transition: border-color 0.3s ease;
}

.numerical-input:focus {
  border-color: var(--teal);
}

.numerical-input.correct {
  border-color: var(--correct);
}

.numerical-input.incorrect {
  border-color: var(--incorrect);
}

.numerical-hint {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
}

/* Drag and drop / sortable */
.sortable-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 500px;
}

.sortable-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  transition: all 0.3s ease;
}

.sortable-rank {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.sortable-text {
  flex: 1;
  font-size: 0.9rem;
  color: var(--text);
}

.sortable-controls {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sortable-btn {
  font-size: 0.7rem;
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--surface-border);
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  line-height: 1;
  transition: all 0.2s ease;
}

.sortable-btn:hover {
  border-color: var(--teal);
  color: var(--teal);
}

.sortable-btn:disabled {
  opacity: 0.2;
  cursor: not-allowed;
}

/* Multi-step input */
.multistep-input {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  padding: 0.8rem 1rem;
  border: 1px solid var(--surface-border);
  background: rgba(13, 12, 10, 0.5);
  color: var(--text);
  outline: none;
  width: 100%;
  max-width: 500px;
  min-height: 60px;
  resize: vertical;
  transition: border-color 0.3s ease;
  line-height: 1.6;
}

.multistep-input:focus {
  border-color: var(--teal);
}

/* Quiz action buttons */
.quiz-actions {
  display: flex;
  gap: 1rem;
  margin-top: 2rem;
  align-items: center;
}

/* Solution panel */
.solution-panel {
  margin-top: 2rem;
  padding: 2rem;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  max-width: 700px;
}

.solution-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.solution-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 700;
  flex-shrink: 0;
}

.solution-icon.correct {
  background: var(--correct);
  color: var(--bg);
}

.solution-icon.incorrect {
  background: var(--incorrect);
  color: var(--bg);
}

.solution-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.solution-title.correct {
  color: var(--correct);
}

.solution-title.incorrect {
  color: var(--incorrect);
}

.solution-correct-answer {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  color: var(--teal);
  padding: 0.6rem 1rem;
  border: 1px solid rgba(90, 138, 135, 0.2);
  background: rgba(90, 138, 135, 0.03);
  margin-bottom: 1.5rem;
  display: inline-block;
}

.solution-steps {
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--text);
  white-space: pre-line;
  margin-bottom: 1.5rem;
}

.misconception-callout {
  padding: 1rem 1.25rem;
  border-left: 2px solid var(--coral);
  background: rgba(184, 122, 106, 0.04);
  margin-top: 1.5rem;
}

.misconception-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--coral);
  margin-bottom: 0.5rem;
}

.misconception-text {
  font-size: 0.8rem;
  line-height: 1.7;
  color: var(--text);
  opacity: 0.8;
}

/* AI explain button */
.ai-explain-btn {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 0.6rem 1rem;
  border: 1px solid rgba(196, 163, 90, 0.3);
  background: rgba(196, 163, 90, 0.05);
  color: var(--accent);
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 1rem;
}

.ai-explain-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg);
}

.ai-explain-btn:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.ai-explain-btn.loading {
  position: relative;
  color: transparent;
}

.ai-explain-btn.loading::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 14px;
  height: 14px;
  margin: -7px 0 0 -7px;
  border: 2px solid rgba(196, 163, 90, 0.3);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

/* AI explanation panel */
.ai-explanation {
  margin-top: 1rem;
  padding: 1.25rem 1.5rem;
  background: rgba(196, 163, 90, 0.03);
  border: 1px solid rgba(196, 163, 90, 0.15);
}

.ai-explanation-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.ai-explanation-text {
  font-size: 0.85rem;
  line-height: 1.7;
  color: var(--text);
}

/* Rendered markdown inside AI explanations */
.ai-explanation-text p {
  margin: 0 0 0.75rem;
}

.ai-explanation-text p:last-child {
  margin-bottom: 0;
}

.ai-explanation-text strong {
  color: var(--accent);
  font-weight: 600;
}

.ai-explanation-text em {
  font-style: italic;
}

.ai-explanation-text h3,
.ai-explanation-text h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
  margin: 1rem 0 0.5rem;
}

.ai-explanation-text h3:first-child,
.ai-explanation-text h4:first-child {
  margin-top: 0;
}

.ai-explanation-text ol,
.ai-explanation-text ul {
  margin: 0.5rem 0 0.75rem;
  padding-left: 1.5rem;
}

.ai-explanation-text li {
  margin-bottom: 0.35rem;
}

.ai-explanation-text code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  padding: 0.15rem 0.4rem;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--surface-border);
}

.ai-explanation-text pre {
  margin: 0.75rem 0;
  padding: 0.75rem 1rem;
  background: rgba(13, 12, 10, 0.5);
  border: 1px solid var(--surface-border);
  overflow-x: auto;
}

.ai-explanation-text pre code {
  padding: 0;
  background: none;
  border: none;
}

.ai-explanation-error {
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  color: var(--coral);
  padding: 0.5rem 0;
}

/* Quiz results */
.results-summary {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 3rem;
}

.result-stat {
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--surface-border);
  text-align: center;
}

.result-stat-value {
  font-size: 2rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.result-stat-value.good {
  color: var(--correct);
}

.result-stat-value.bad {
  color: var(--incorrect);
}

.result-stat-value.neutral {
  color: var(--teal);
}

.result-stat-label {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-dim);
}

/* Topic breakdown table */
.topic-breakdown {
  margin-bottom: 3rem;
}

.topic-breakdown-heading {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}

.breakdown-row {
  display: flex;
  align-items: center;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
  gap: 1rem;
}

.breakdown-topic {
  flex: 1;
  font-size: 0.85rem;
  color: var(--text);
}

.breakdown-score {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  width: 60px;
  text-align: right;
}

.breakdown-bar-wrapper {
  width: 120px;
  height: 4px;
  background: var(--surface-border);
}

.breakdown-bar {
  height: 100%;
  transition: width 0.6s ease;
}

/* Problem review list */
.problem-review-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.problem-review-item {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--surface-border);
  background: var(--surface);
  cursor: pointer;
  transition: all 0.3s ease;
}

.problem-review-item:hover {
  background: var(--surface-hover);
}

.problem-review-item.correct {
  border-left: 2px solid var(--correct);
}

.problem-review-item.incorrect {
  border-left: 2px solid var(--incorrect);
}

.review-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.review-item-number {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  color: var(--text-dim);
}

.review-item-result {
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.review-item-result.correct {
  color: var(--correct);
}

.review-item-result.incorrect {
  color: var(--incorrect);
}

.review-item-text {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text);
  opacity: 0.8;
}

.review-item-solution {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--surface-border);
  display: none;
}

.problem-review-item.expanded .review-item-solution {
  display: block;
}

/* Results actions */
.results-actions {
  display: flex;
  gap: 1rem;
  margin-top: 3rem;
}

/* Responsive */
@media (max-width: 900px) {
  .quiz-modes {
    grid-template-columns: 1fr;
  }

  .results-summary {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {
  .results-summary {
    grid-template-columns: 1fr;
  }

  .quiz-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .breakdown-bar-wrapper {
    width: 80px;
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .choice-option:hover {
    border-color: var(--surface-border);
    background: var(--surface);
  }

  .choice-option:active {
    border-color: rgba(90, 138, 135, 0.3);
    background: var(--surface-hover);
  }

  .mode-card:hover {
    transform: none;
    background: var(--surface);
  }

  .mode-card:active {
    background: var(--surface-hover);
  }
}