/* === QUIZ ENGINE - IAcademy === */

.quiz-container {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 24px;
  min-height: 60vh;
}

/* Progress bar */
.quiz-progress {
  margin-bottom: 32px;
}

.quiz-progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-light);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.quiz-progress-fill {
  height: 100%;
  background: var(--accent);
  border-radius: 4px;
  transition: width 0.6s ease-out;
  box-shadow: 0 0 12px rgba(239, 68, 68, 0.3), 0 0 4px rgba(239, 68, 68, 0.5);
}

.quiz-progress-text {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.quiz-progress-text .quiz-timer {
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-dim);
}

/* Question */
.quiz-question {
  margin-bottom: 28px;
  animation: quizFadeIn 0.3s ease;
}

.quiz-question h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 8px;
}

.quiz-question-number {
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
  display: block;
}

/* Options */
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 20px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 15px;
  line-height: 1.5;
  color: var(--text);
  user-select: none;
}

.quiz-option:hover:not(.quiz-option--disabled) {
  border-color: var(--border);
  background: var(--bg-alt);
}

.quiz-option-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--bg-light);
  border: 1px solid var(--glass-border);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.quiz-option:hover:not(.quiz-option--disabled) .quiz-option-letter {
  border-color: var(--accent);
  color: var(--accent);
}

.quiz-option.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.quiz-option.selected .quiz-option-letter {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.quiz-option.correct {
  border-color: var(--success);
  background: rgba(34, 197, 94, 0.08);
  animation: quizCorrect 0.4s ease;
}

.quiz-option.correct .quiz-option-letter {
  background: var(--success);
  border-color: var(--success);
  color: #fff;
}

.quiz-option.incorrect {
  border-color: var(--error);
  background: rgba(239, 68, 68, 0.08);
  animation: quizIncorrect 0.4s ease;
}

.quiz-option.incorrect .quiz-option-letter {
  background: var(--error);
  border-color: var(--error);
  color: #fff;
}

.quiz-option--disabled {
  cursor: default;
  opacity: 0.6;
}

.quiz-option.correct.quiz-option--disabled,
.quiz-option.incorrect.quiz-option--disabled {
  opacity: 1;
}

/* Explanation */
.quiz-explanation {
  padding: 16px 20px;
  background: var(--bg-light);
  border-left: 3px solid var(--accent);
  border-radius: 0 12px 12px 0;
  margin-bottom: 24px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-muted);
  animation: quizSlideDown 0.3s ease;
}

.quiz-explanation strong {
  color: var(--text);
}

/* Buttons */
.quiz-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: none;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all 0.2s ease;
}

.quiz-btn--primary {
  background: var(--accent);
  color: #fff;
}

.quiz-btn--primary:hover {
  background: var(--accent-dark);
  transform: translateY(-1px);
}

.quiz-btn--primary:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
}

.quiz-btn--secondary {
  background: var(--bg-light);
  color: var(--text);
  border: 1px solid var(--glass-border);
}

.quiz-btn--secondary:hover {
  border-color: var(--border);
}

.quiz-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
}

/* Result screen */
.quiz-result {
  text-align: center;
  animation: quizFadeIn 0.4s ease;
}

.quiz-result-score {
  font-family: var(--font-metric, 'Inter Tight', 'Inter', system-ui, sans-serif);
  font-size: 72px;
  font-weight: 700;
  line-height: 1;
  margin: 24px 0 8px;
  letter-spacing: -0.02em;
}

.quiz-result-score.pass {
  color: var(--success);
}

.quiz-result-score.fail {
  color: var(--error);
}

.quiz-result-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
}

.quiz-result-badge {
  display: inline-block;
  padding: 8px 24px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 700;
  margin: 16px 0 8px;
  letter-spacing: 0.5px;
}

.quiz-result-badge.pass {
  background: rgba(34, 197, 94, 0.12);
  border: 1px solid rgba(34, 197, 94, 0.3);
  color: var(--success);
}

.quiz-result-badge.fail {
  background: rgba(239, 68, 68, 0.12);
  border: 1px solid rgba(239, 68, 68, 0.3);
  color: var(--error);
}

.quiz-result-stats {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin: 24px 0 32px;
  flex-wrap: wrap;
}

.quiz-result-stat {
  text-align: center;
}

.quiz-result-stat-value {
  font-size: 24px;
  font-weight: 700;
  color: var(--text);
  font-family: 'JetBrains Mono', monospace;
}

.quiz-result-stat-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

/* Certificate form */
.quiz-certificate-form {
  max-width: 440px;
  margin: 32px auto 0;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  text-align: left;
  animation: quizSlideDown 0.3s ease;
}

.quiz-certificate-form h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}

.quiz-certificate-form label {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
  margin-bottom: 6px;
}

.quiz-certificate-form input[type="text"] {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-light);
  border: 1px solid var(--glass-border);
  border-radius: 10px;
  color: var(--text);
  font-size: 15px;
  font-family: 'Inter', sans-serif;
  outline: none;
  transition: border-color 0.2s;
  margin-bottom: 16px;
}

.quiz-certificate-form input[type="text"]:focus {
  border-color: var(--accent);
}

.quiz-certificate-form input[type="text"]::placeholder {
  color: var(--text-dim);
}

.quiz-certificate-form .quiz-btn {
  width: 100%;
}

/* Certificate preview */
.quiz-certificate-preview {
  margin-top: 24px;
  text-align: center;
}

.quiz-certificate-preview canvas {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--glass-border);
}

/* Loading state */
.quiz-loading {
  text-align: center;
  padding: 60px 0;
  color: var(--text-muted);
}

/* Animations */
@keyframes quizFadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes quizSlideDown {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes quizCorrect {
  0% { transform: scale(1); }
  50% { transform: scale(1.02); }
  100% { transform: scale(1); }
}

@keyframes quizIncorrect {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* Responsive */
@media (max-width: 640px) {
  .quiz-container {
    padding: 24px 16px;
  }

  .quiz-question h2 {
    font-size: 18px;
  }

  .quiz-option {
    padding: 14px 16px;
    gap: 12px;
    font-size: 14px;
  }

  .quiz-option-letter {
    min-width: 28px;
    height: 28px;
    font-size: 12px;
  }

  .quiz-result-score {
    font-size: 56px;
  }

  .quiz-result-stats {
    gap: 20px;
  }

  .quiz-certificate-form {
    padding: 20px;
  }
}