/* ==========================================================================
   myK53 — Test Engine Styles (test.css)
   Loaded IN ADDITION to style.css on test/quiz pages only.
   ========================================================================== */

/* --------------------------------------------------------------------------
   Design Tokens (mirrors style.css)
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #00B4AA;
  --color-primary-light: rgba(0, 180, 170, 0.08);
  --color-primary-lighter: rgba(0, 180, 170, 0.15);
  --color-secondary: #C8D42A;
  --color-dark: #1B2838;
  --color-accent-red: #E74C3C;
  --color-accent-red-light: rgba(231, 76, 60, 0.08);
  --color-accent-green: #27AE60;
  --color-accent-green-light: rgba(39, 174, 96, 0.08);
  --color-bg: #F5F7FA;
  --color-surface: #FFFFFF;
  --color-text: #2D3436;
  --color-text-muted: #636E72;
  --color-border: #E2E8F0;
  --color-blue: #3B82F6;
  --color-blue-light: rgba(59, 130, 246, 0.08);
  --color-orange: #F39C12;
  --font-heading: 'Outfit', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
}

/* ==========================================================================
   1. PRE-TEST SCREEN
   ========================================================================== */

.pre-test {
  max-width: 700px;
  margin: 0 auto;
  padding: 40px 20px;
  text-align: center;
}

.pre-test-header {
  margin-bottom: 32px;
}

.pre-test-header h1 {
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-dark);
  margin: 0 0 12px;
}

.pre-test-header p {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Info cards row */
.test-info-cards {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.test-info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  min-width: 140px;
  flex: 1;
  max-width: 200px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.test-info-card .info-icon {
  font-size: 1.6rem;
  margin-bottom: 4px;
}

.test-info-card .info-value {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-dark);
}

.test-info-card .info-label {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* Mode selector */
.mode-selector {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.mode-btn {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s ease;
}

.mode-btn:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}

.mode-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.mode-btn.active:hover {
  background: #009e95;
}

/* Start CTA */
.start-test-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  padding: 16px 48px;
  border: none;
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 4px 14px rgba(0, 180, 170, 0.35);
  margin-bottom: 28px;
}

.start-test-btn:hover {
  background: #009e95;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 180, 170, 0.4);
}

.start-test-btn:active {
  transform: translateY(0);
}

/* Subcategories */
.subcategories-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.subcategories-list .tag {
  font-family: var(--font-body);
  font-size: 0.8rem;
  padding: 6px 14px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: 20px;
  font-weight: 500;
}

/* ==========================================================================
   2. TEST SCREEN LAYOUT
   ========================================================================== */

.test-screen {
  display: flex;
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  min-height: calc(100vh - 80px);
}

.test-main {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.test-sidebar {
  width: 280px;
  flex-shrink: 0;
  position: sticky;
  top: 20px;
  align-self: flex-start;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.test-sidebar h3 {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-dark);
  margin: 0 0 16px;
}

/* ==========================================================================
   3. TEST HEADER
   ========================================================================== */

.test-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.question-counter {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-muted);
}

.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--color-border);
  border-radius: 2px;
  margin-bottom: 20px;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: 2px;
  transition: width 0.4s ease;
}

.timer {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.timer .timer-icon {
  font-size: 1rem;
}

.timer.warning {
  color: var(--color-accent-red);
  animation: timerPulse 1s ease-in-out infinite;
}

@keyframes timerPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

/* ==========================================================================
   4. QUESTION CARD
   ========================================================================== */

.question-card {
  background: var(--color-surface);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: 32px;
  margin-bottom: 20px;
  border: 1px solid var(--color-border);
}

.question-text {
  font-family: var(--font-body);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.6;
  margin: 0 0 24px;
}

.question-image {
  max-width: 300px;
  margin: 0 auto 24px;
  text-align: center;
}

.question-image img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-md);
  display: block;
}

/* ==========================================================================
   5. OPTIONS
   ========================================================================== */

.options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.option-btn {
  display: flex;
  align-items: center;
  gap: 14px;
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.5;
  position: relative;
}

.option-btn:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.option-btn.selected {
  border-color: var(--color-blue);
  background: var(--color-blue-light);
}

.option-btn.correct {
  border-color: var(--color-accent-green);
  background: var(--color-accent-green-light);
}

.option-btn.correct::after {
  content: "\2713";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent-green);
}

.option-btn.incorrect {
  border-color: var(--color-accent-red);
  background: var(--color-accent-red-light);
  animation: shake 0.4s ease;
}

.option-btn.incorrect::after {
  content: "\2717";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent-red);
}

.option-btn.show-correct {
  border-color: var(--color-accent-green);
  background: var(--color-accent-green-light);
}

.option-btn:disabled {
  cursor: not-allowed;
  opacity: 0.7;
}

.option-btn:disabled:hover {
  border-color: var(--color-border);
  background: var(--color-surface);
}

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

.option-btn.correct:disabled:hover {
  border-color: var(--color-accent-green);
  background: var(--color-accent-green-light);
}

.option-btn.incorrect:disabled:hover {
  border-color: var(--color-accent-red);
  background: var(--color-accent-red-light);
}

.option-btn.show-correct:disabled:hover {
  border-color: var(--color-accent-green);
  background: var(--color-accent-green-light);
}

/* Option letter circle */
.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  min-width: 28px;
  border-radius: 50%;
  background: var(--color-bg);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  transition: all 0.2s ease;
}

.option-btn:hover .option-letter {
  background: var(--color-primary-lighter);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

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

.option-btn.correct .option-letter {
  background: var(--color-accent-green);
  border-color: var(--color-accent-green);
  color: #fff;
}

.option-btn.incorrect .option-letter {
  background: var(--color-accent-red);
  border-color: var(--color-accent-red);
  color: #fff;
}

.option-btn.show-correct .option-letter {
  background: var(--color-accent-green);
  border-color: var(--color-accent-green);
  color: #fff;
}

/* ==========================================================================
   6. FEEDBACK PANEL
   ========================================================================== */

.feedback-panel {
  padding: 20px 24px;
  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  margin: -1px -1px 0;
  animation: slideUp 0.35s ease-out;
  border-left: 4px solid transparent;
}

.feedback-panel.correct {
  background: rgba(39, 174, 96, 0.06);
  border-left-color: var(--color-accent-green);
}

.feedback-panel.incorrect {
  background: rgba(231, 76, 60, 0.06);
  border-left-color: var(--color-accent-red);
}

.feedback-icon {
  font-size: 1.5rem;
  margin-bottom: 8px;
  display: block;
}

.feedback-panel.correct .feedback-icon {
  color: var(--color-accent-green);
}

.feedback-panel.incorrect .feedback-icon {
  color: var(--color-accent-red);
}

.feedback-explanation {
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  line-height: 1.6;
  margin: 0 0 10px;
}

.feedback-tip {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0 0 6px;
}

.feedback-source {
  font-family: var(--font-body);
  font-size: 0.78rem;
  color: #b2bec3;
  margin: 0;
}

/* ==========================================================================
   7. NAVIGATION CONTROLS
   ========================================================================== */

.test-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 0;
  gap: 12px;
}

.btn-prev,
.btn-next {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 24px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-prev:hover,
.btn-next:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-prev::before {
  content: "\2190";
}

.btn-next::after {
  content: "\2192";
}

.btn-next.primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.btn-next.primary:hover {
  background: #009e95;
  border-color: #009e95;
}

.flag-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  cursor: pointer;
  font-size: 1.2rem;
  transition: all 0.2s ease;
  color: var(--color-text-muted);
}

.flag-btn:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
}

.flag-btn.flagged {
  background: rgba(243, 156, 18, 0.1);
  border-color: var(--color-orange);
  color: var(--color-orange);
}

/* ==========================================================================
   8. QUESTION NAV GRID (sidebar)
   ========================================================================== */

.question-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
}

.q-nav-btn {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}

.q-nav-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.q-nav-btn.current {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: #fff;
}

.q-nav-btn.answered {
  background: #dfe6e9;
  border-color: #dfe6e9;
  color: var(--color-text-muted);
}

.q-nav-btn.correct-answered {
  background: var(--color-accent-green);
  border-color: var(--color-accent-green);
  color: #fff;
}

.q-nav-btn.incorrect-answered {
  background: var(--color-accent-red);
  border-color: var(--color-accent-red);
  color: #fff;
}

.q-nav-btn.flagged::before {
  content: "";
  position: absolute;
  top: 2px;
  right: 2px;
  width: 8px;
  height: 8px;
  background: var(--color-orange);
  border-radius: 50%;
}

.q-nav-btn.unanswered {
  background: var(--color-surface);
  border-color: var(--color-border);
}

/* ==========================================================================
   9. RESULTS SCREEN
   ========================================================================== */

.results-screen {
  max-width: 600px;
  margin: 0 auto;
  padding: 40px 20px;
  text-align: center;
}

/* Score circle */
.score-circle {
  width: 180px;
  height: 180px;
  margin: 0 auto 24px;
  position: relative;
}

.score-circle svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.score-circle .circle-bg {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 10;
}

.score-circle .circle-progress {
  fill: none;
  stroke-width: 10;
  stroke-linecap: round;
  animation: scoreReveal 1.2s ease-out forwards;
}

.score-circle.pass .circle-progress {
  stroke: var(--color-accent-green);
}

.score-circle.fail .circle-progress {
  stroke: var(--color-accent-red);
}

.score-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  font-family: var(--font-heading);
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--color-dark);
}

.score-label {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, 40%);
  font-family: var(--font-heading);
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
}

.score-circle.pass .score-label {
  color: var(--color-accent-green);
}

.score-circle.fail .score-label {
  color: var(--color-accent-red);
}

/* Score details */
.score-details {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.score-details .detail-item {
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.score-details .detail-item strong {
  display: block;
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 2px;
}

/* Subcategory breakdown */
.results-summary {
  text-align: left;
  margin-bottom: 32px;
}

.results-summary h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin: 0 0 16px;
}

.subcategory-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.subcategory-bar .bar-label {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text);
  width: 140px;
  min-width: 140px;
  text-align: right;
}

.subcategory-bar .bar-track {
  flex: 1;
  height: 10px;
  background: var(--color-border);
  border-radius: 5px;
  overflow: hidden;
}

.subcategory-bar .bar-fill {
  height: 100%;
  border-radius: 5px;
  transition: width 0.6s ease;
}

.subcategory-bar .bar-fill.good {
  background: var(--color-accent-green);
}

.subcategory-bar .bar-fill.poor {
  background: var(--color-accent-red);
}

.subcategory-bar .bar-percent {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
  width: 42px;
  min-width: 42px;
}

/* Incorrect answers list */
.incorrect-list {
  text-align: left;
  margin-bottom: 32px;
}

.incorrect-list h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-dark);
  margin: 0 0 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
}

.incorrect-list h3::after {
  content: "\25BC";
  font-size: 0.7rem;
  transition: transform 0.2s ease;
}

.incorrect-list.collapsed h3::after {
  transform: rotate(-90deg);
}

.incorrect-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 10px;
  box-shadow: var(--shadow-sm);
}

.incorrect-item .incorrect-question {
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  margin: 0 0 10px;
  line-height: 1.5;
}

.incorrect-item .your-answer {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-accent-red);
  margin: 0 0 4px;
}

.incorrect-item .correct-answer {
  font-family: var(--font-body);
  font-size: 0.88rem;
  color: var(--color-accent-green);
  margin: 0 0 8px;
}

.incorrect-item .incorrect-explanation {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Results actions */
.results-actions {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.results-actions .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.2s ease;
}

.results-actions .btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-1px);
}

.results-actions .btn.primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.results-actions .btn.primary:hover {
  background: #009e95;
  border-color: #009e95;
}

.share-score {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 24px;
  border: none;
  border-radius: var(--radius-md);
  background: #25D366;
  color: #fff;
  cursor: pointer;
  transition: all 0.2s ease;
}

.share-score:hover {
  background: #1ebe57;
  transform: translateY(-1px);
}

/* ==========================================================================
   10. STREAK & CONFIDENCE
   ========================================================================== */

.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  background: rgba(243, 156, 18, 0.1);
  color: var(--color-orange);
  border-radius: 20px;
  border: 1px solid rgba(243, 156, 18, 0.25);
}

.confidence-dots {
  display: inline-flex;
  gap: 4px;
  align-items: center;
}

.confidence-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  transition: background 0.2s ease;
}

.confidence-dots .dot.filled {
  background: var(--color-primary);
}

.best-score {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 6px 14px;
  background: var(--color-accent-green-light);
  color: var(--color-accent-green);
  border-radius: 20px;
  border: 1px solid rgba(39, 174, 96, 0.25);
}

/* ==========================================================================
   11. MOBILE DRAWER
   ========================================================================== */

.drawer-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 900;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: 0 4px 16px rgba(0, 180, 170, 0.4);
  transition: all 0.2s ease;
}

.drawer-toggle:hover {
  transform: scale(1.05);
}

.test-drawer {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 950;
  background: var(--color-surface);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.12);
  padding: 12px 20px 28px;
  transform: translateY(100%);
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  max-height: 55vh;
  overflow-y: auto;
}

.test-drawer.open {
  transform: translateY(0);
}

.drawer-handle {
  width: 36px;
  height: 4px;
  background: #ccc;
  border-radius: 2px;
  margin: 0 auto 14px;
}

/* Drawer overlay backdrop */
.drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 940;
  background: rgba(0, 0, 0, 0.3);
}

.drawer-overlay.open {
  display: block;
}

/* ==========================================================================
   12. ANIMATIONS
   ========================================================================== */

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(5px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(3px); }
}

@keyframes scoreReveal {
  from {
    stroke-dasharray: 0, 999;
  }
}

@keyframes correctFlash {
  0% { background-color: rgba(39, 174, 96, 0); }
  30% { background-color: rgba(39, 174, 96, 0.12); }
  100% { background-color: rgba(39, 174, 96, 0); }
}

.correct-flash {
  animation: correctFlash 0.6s ease;
}

/* Question transitions */
.question-enter {
  animation: questionIn 0.35s ease-out forwards;
}

@keyframes questionIn {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

.question-exit {
  animation: questionOut 0.25s ease-in forwards;
}

@keyframes questionOut {
  from {
    opacity: 1;
    transform: translateX(0);
  }
  to {
    opacity: 0;
    transform: translateX(-30px);
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .progress-fill {
    transition: none;
  }

  .test-drawer {
    transition: none;
  }
}

/* ==========================================================================
   13. DIAGRAM DISPLAY
   ========================================================================== */

.diagram-container {
  max-width: 100%;
  padding: 20px;
  margin: 20px auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  text-align: center;
}

.diagram-container img,
.diagram-container svg {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.diagram-label {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 12px;
  text-align: center;
}

/* ==========================================================================
   14. RESPONSIVE
   ========================================================================== */

/* ---- Tablet (768px - 1024px) ---- */
@media (min-width: 768px) and (max-width: 1024px) {
  .test-sidebar {
    width: 200px;
    padding: 16px;
  }

  .question-grid {
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
  }

  .q-nav-btn {
    width: 32px;
    height: 32px;
    font-size: 0.75rem;
  }

  .question-card {
    padding: 24px;
  }
}

/* ---- Mobile (< 768px) ---- */
@media (max-width: 767px) {
  /* Hide sidebar, show drawer toggle */
  .test-sidebar {
    display: none;
  }

  .drawer-toggle {
    display: flex;
  }

  .test-drawer {
    display: block;
  }

  /* Layout */
  .test-screen {
    flex-direction: column;
    padding: 12px;
    gap: 12px;
  }

  /* Pre-test */
  .pre-test {
    padding: 24px 16px;
  }

  .pre-test-header h1 {
    font-size: 1.5rem;
  }

  .test-info-cards {
    gap: 10px;
  }

  .test-info-card {
    min-width: 100px;
    padding: 14px 12px;
  }

  .test-info-card .info-value {
    font-size: 1.25rem;
  }

  .mode-selector {
    gap: 8px;
  }

  .mode-btn {
    padding: 8px 16px;
    font-size: 0.83rem;
  }

  .start-test-btn {
    width: 100%;
    font-size: 1.05rem;
    padding: 14px 32px;
  }

  /* Question card */
  .question-card {
    padding: 20px 16px;
    border-radius: var(--radius-lg);
  }

  .question-text {
    font-size: 1.1rem;
  }

  .question-image {
    max-width: 100%;
  }

  /* Options */
  .option-btn {
    padding: 14px 16px;
    font-size: 0.95rem;
  }

  .option-letter {
    width: 26px;
    height: 26px;
    min-width: 26px;
    font-size: 0.8rem;
  }

  /* Timer */
  .timer {
    font-size: 0.95rem;
  }

  .question-counter {
    font-size: 0.82rem;
  }

  /* Nav */
  .test-nav {
    padding: 12px 0;
  }

  .btn-prev,
  .btn-next {
    padding: 10px 18px;
    font-size: 0.9rem;
  }

  /* Results */
  .results-screen {
    padding: 28px 16px;
  }

  .score-circle {
    width: 140px;
    height: 140px;
  }

  .score-text {
    font-size: 2rem;
  }

  .score-label {
    font-size: 0.8rem;
  }

  .score-details {
    gap: 16px;
  }

  .subcategory-bar .bar-label {
    width: 100px;
    min-width: 100px;
    font-size: 0.8rem;
  }

  .results-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .results-actions .btn {
    justify-content: center;
  }

  /* Drawer grid */
  .test-drawer .question-grid {
    grid-template-columns: repeat(8, 1fr);
    gap: 6px;
  }

  .test-drawer .q-nav-btn {
    width: 100%;
    height: 34px;
  }

  /* Feedback */
  .feedback-panel {
    padding: 16px;
  }

  /* Diagram */
  .diagram-container {
    padding: 12px;
    margin: 12px auto;
  }
}

/* ---- Small mobile (< 400px) ---- */
@media (max-width: 399px) {
  .test-info-cards {
    flex-direction: column;
    align-items: center;
  }

  .test-info-card {
    max-width: 100%;
    width: 100%;
  }

  .mode-selector {
    flex-direction: column;
    align-items: stretch;
  }

  .mode-btn {
    text-align: center;
  }

  .test-drawer .question-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .subcategory-bar {
    flex-wrap: wrap;
  }

  .subcategory-bar .bar-label {
    width: 100%;
    text-align: left;
    margin-bottom: 4px;
  }
}