/* ============================================================
   SchUG-Quiz – Style Sheet
   Schulunterrichtsgesetz – German Law Knowledge Quiz
   Serious, professional e-learning aesthetic
   ============================================================ */

/* ----------------------------------------------------------
   Custom Properties
   ---------------------------------------------------------- */
:root {
  /* Primary palette — authority, law, professionalism */
  --color-primary:        #1a3a5c;
  --color-primary-dark:   #0f2440;
  --color-primary-light:  #2b5a8a;
  --color-primary-lighter:#e8eef6;

  /* Accent */
  --color-accent:         #1e4d7a;
  --color-accent-glow:    rgba(26, 58, 92, 0.15);

  /* Background & surface */
  --color-bg:             #f0ece6;
  --color-surface:        #ffffff;
  --color-border:         #d9d4cc;
  --color-border-light:   #e8e4de;

  /* Text */
  --color-text:           #1f2937;
  --color-text-secondary: #5b6778;
  --color-text-muted:     #8b95a3;
  --color-text-inverse:   #ffffff;

  /* Feedback */
  --color-correct:        #2e7d32;
  --color-correct-bg:     #e8f5e9;
  --color-correct-border: #a5d6a7;
  --color-wrong:          #c62828;
  --color-wrong-bg:       #fbe9e7;
  --color-wrong-border:   #ef9a9a;

  /* Misc */
  --color-info-bg:        #eef2f7;
  --color-info-border:    #d0d8e3;
  --color-shadow:         rgba(0, 0, 0, 0.06);
  --color-shadow-strong:  rgba(0, 0, 0, 0.10);

  /* Typography */
  --font-body:            "Inter", system-ui, -apple-system, BlinkMacSystemFont,
                          "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-weight-normal:   400;
  --font-weight-medium:   500;
  --font-weight-semibold: 600;
  --font-weight-bold:     700;

  /* Spacing scale (4 px base) */
  --space-1:  4px;
  --space-2:  8px;
  --space-3:  12px;
  --space-4:  16px;
  --space-5:  20px;
  --space-6:  24px;
  --space-8:  32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Radii */
  --radius-sm:   6px;
  --radius-md:   10px;
  --radius-lg:   14px;
  --radius-xl:   20px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast:   150ms ease;
  --transition-base:   250ms ease;
  --transition-slow:   400ms cubic-bezier(0.22, 1, 0.36, 1);

  /* Shadows */
  --shadow-card:       0 1px 3px var(--color-shadow), 0 1px 2px var(--color-shadow);
  --shadow-card-hover: 0 4px 12px var(--color-shadow-strong), 0 2px 4px var(--color-shadow);
  --shadow-elevated:   0 8px 24px var(--color-shadow-strong), 0 2px 6px var(--color-shadow);
  --shadow-btn:        0 1px 2px var(--color-shadow);
}


/* ----------------------------------------------------------
   Reset & Base
   ---------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 100%;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-weight: var(--font-weight-normal);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 60% at 50% -20%, rgba(26, 58, 92, 0.03) 0%, transparent 100%),
    radial-gradient(ellipse 60% 50% at 80% 100%, rgba(26, 58, 92, 0.02) 0%, transparent 100%);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font-family: inherit;
  cursor: pointer;
}

strong {
  font-weight: var(--font-weight-semibold);
}


/* ----------------------------------------------------------
   App Container
   ---------------------------------------------------------- */
#app {
  max-width: 720px;
  margin: 0 auto;
  padding: var(--space-6) var(--space-5);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

@media (min-width: 640px) {
  #app {
    padding: var(--space-10) var(--space-6);
  }
}


/* ----------------------------------------------------------
   Screen Transitions
   ---------------------------------------------------------- */
.screen {
  display: none;
  animation: none;
}

.screen.active {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  animation: screenIn 400ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes screenIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}


/* ----------------------------------------------------------
   Card
   ---------------------------------------------------------- */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  padding: var(--space-6);
}

@media (min-width: 640px) {
  .card {
    padding: var(--space-10);
    border-radius: var(--radius-xl);
  }
}


/* ----------------------------------------------------------
   Logo
   ---------------------------------------------------------- */
.logo {
  font-size: 2.75rem;
  line-height: 1;
  margin-bottom: var(--space-3);
  text-align: center;
}


/* ----------------------------------------------------------
   Headings
   ---------------------------------------------------------- */
h1 {
  font-size: 1.625rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.25;
  color: var(--color-primary);
  text-align: center;
  margin-bottom: var(--space-2);
}

h2 {
  font-size: 1.375rem;
  font-weight: var(--font-weight-bold);
  line-height: 1.3;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

h3 {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

@media (min-width: 640px) {
  h1 { font-size: 1.875rem; }
  h2 { font-size: 1.5rem; }
}


/* ----------------------------------------------------------
   Subtitle
   ---------------------------------------------------------- */
.subtitle {
  font-size: 0.95rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  text-align: center;
  margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .subtitle {
    font-size: 1.05rem;
  }
}


/* ----------------------------------------------------------
   Disclaimer Banner (Start Screen)
   ---------------------------------------------------------- */
.disclaimer-banner {
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  margin-bottom: var(--space-5);
  font-size: 0.8125rem;
  line-height: 1.5;
  color: #8d6e00;
}

/* ----------------------------------------------------------
   Paragraph Grid (Start Screen)
   ---------------------------------------------------------- */
.paragraph-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.paragraph-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  text-align: left;
  font: inherit;
  color: inherit;
  width: 100%;
}

.paragraph-card:hover {
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-card-hover);
}

.paragraph-card:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.paragraph-card-title {
  font-weight: var(--font-weight-semibold);
  font-size: 1rem;
  color: var(--color-text);
}

.paragraph-card-desc {
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.paragraph-card-progress {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: var(--space-1);
}

.paragraph-card-progress-bar {
  flex: 1;
  height: 6px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.paragraph-card-progress-fill {
  height: 100%;
  background: var(--color-primary-light);
  border-radius: var(--radius-full);
  transition: width var(--transition-base);
}

.paragraph-card-progress-label {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  white-space: nowrap;
}

/* ----------------------------------------------------------
   Quiz Config (Start Screen)
   ---------------------------------------------------------- */
.quiz-config {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.config-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.config-group label:not(.checkbox-label) {
  font-size: 0.8125rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* (Dropdowns entfernt – nur noch Checkboxen und Button) */

/* Checkbox toggle */
.checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.9375rem;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--space-2) 0;
  user-select: none;
}

.checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--color-primary);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-shrink: 0;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.checkbox-label input[type="checkbox"]:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

/* Error message */
.error-message {
  color: var(--color-wrong);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  text-align: center;
  padding: var(--space-3);
  background: var(--color-wrong-bg);
  border-radius: var(--radius-md);
  margin-top: var(--space-3);
  border: 1px solid var(--color-wrong-border);
}


/* ----------------------------------------------------------
   Buttons – Base
   ---------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  border: 1.5px solid transparent;
  border-radius: var(--radius-md);
  transition:
    background var(--transition-fast),
    color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-fast);
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

/* Primary */
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: 0 2px 8px var(--color-accent-glow);
}

.btn-primary:active {
  box-shadow: var(--shadow-btn);
}

/* Secondary */
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}

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

/* Ghost */
.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border-color: transparent;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.btn-ghost:hover {
  background: rgba(0, 0, 0, 0.04);
  color: var(--color-text);
}

/* Full-width variant (mobile) */
.btn-primary.full-width-mobile {
  width: 100%;
}

@media (min-width: 640px) {
  .btn-primary.full-width-mobile {
    width: auto;
    min-width: 220px;
  }
}


/* ----------------------------------------------------------
   Start Screen – CTA Button
   ---------------------------------------------------------- */
#btn-start {
  width: 100%;
  padding: var(--space-4) var(--space-8);
  font-size: 1.0625rem;
  font-weight: var(--font-weight-semibold);
}

@media (min-width: 640px) {
  #btn-start {
    width: auto;
    align-self: center;
    min-width: 260px;
  }
}

/* Center the start card content */
#screen-start.active .card {
  text-align: center;
}


/* ----------------------------------------------------------
   Quiz Header
   ---------------------------------------------------------- */
.quiz-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) 0;
  flex-wrap: wrap;
}

.header-left,
.header-center,
.header-right {
  flex: 1 1 auto;
}

.header-center {
  text-align: center;
}

.header-right {
  text-align: right;
}

@media (max-width: 480px) {
  .quiz-header {
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
  }

  .header-left,
  .header-center,
  .header-right {
    text-align: center;
    flex: none;
    width: 100%;
  }
}

/* Section badge */
.section-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  line-height: 1.4;
  color: var(--color-primary);
  background: var(--color-primary-lighter);
  border-radius: var(--radius-full);
  letter-spacing: 0.01em;
  text-transform: uppercase;
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Progress text */
#progress-text {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

/* Score display */
#score-display {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  font-variant-numeric: tabular-nums;
}


/* ----------------------------------------------------------
   Progress Bar
   ---------------------------------------------------------- */
.progress-bar {
  width: 100%;
  height: 4px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: var(--space-2);
}

.progress-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  width: 0%;
  transition: width var(--transition-slow);
}


/* ----------------------------------------------------------
   Question Card
   ---------------------------------------------------------- */
.question-card {
  animation: cardIn 350ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

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

/* Question number */
.question-number {
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}

/* Question text */
.question-text {
  font-size: 1.0625rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.55;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .question-text {
    font-size: 1.125rem;
  }
}


/* ----------------------------------------------------------
   Options Container
   ---------------------------------------------------------- */
.options-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-6);
}

/* Option items – wrapped in .option div, label inside */
.options-container .option,
.options-container .option-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast);
  font-size: 0.9375rem;
  line-height: 1.5;
  user-select: none;
}

/* Inner label – just flex layout, no box styling (parent handles that) */
.options-container .option-label {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
  cursor: pointer;
}

.options-container .option:hover,
.options-container .option-item:hover {
  border-color: var(--color-primary-light);
  background: var(--color-primary-lighter);
  box-shadow: 0 1px 4px var(--color-accent-glow);
}

/* Hide the native radio/checkbox – we style the container instead */
.options-container input[type="radio"],
.options-container input[type="checkbox"] {
  opacity: 0;
  position: absolute;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* Custom pseudo-radio / pseudo-checkbox on the .option container */
.options-container .option::before,
.options-container .option-item::before {
  content: "";
  display: flex;
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 2px solid var(--color-border);
  border-radius: 50%; /* circle for radio */
  background: var(--color-surface);
  transition:
    border-color var(--transition-fast),
    background var(--transition-fast),
    box-shadow var(--transition-fast);
}

/* Square for checkbox (multi-select) */
.options-container .option:has(input[type="checkbox"])::before,
.options-container .option-item:has(input[type="checkbox"])::before {
  border-radius: var(--radius-sm);
}


/* ----------------------------------------------------------
   Option States: Selected
   ---------------------------------------------------------- */
.options-container .option:has(input:checked),
.options-container .option-item:has(input:checked) {
  border-color: var(--color-primary);
  background: var(--color-primary-lighter);
  box-shadow: 0 0 0 1px rgba(26, 58, 92, 0.08);
}

.options-container .option:has(input:checked)::before,
.options-container .option-item:has(input:checked)::before {
  border-color: var(--color-primary);
  background: var(--color-primary);
  box-shadow: inset 0 0 0 3px white;
}


/* ----------------------------------------------------------
   Option States: Correct
   ---------------------------------------------------------- */
.options-container .option-correct,
.options-container .option-item.option-correct {
  border-color: var(--color-correct-border);
  background: var(--color-correct-bg);
  cursor: default;
}

.options-container .option-correct::before,
.options-container .option-item.option-correct::before {
  border-color: var(--color-correct);
  background: var(--color-correct);
  box-shadow: inset 0 0 0 3px white;
}


/* ----------------------------------------------------------
   Option States: Wrong
   ---------------------------------------------------------- */
.options-container .option-wrong,
.options-container .option-item.option-wrong {
  border-color: var(--color-wrong-border);
  background: var(--color-wrong-bg);
  cursor: default;
}

.options-container .option-wrong::before,
.options-container .option-item.option-wrong::before {
  border-color: var(--color-wrong);
  background: var(--color-wrong);
  box-shadow: inset 0 0 0 3px white;
}


/* ----------------------------------------------------------
   Option States: Disabled (after answering)
   ---------------------------------------------------------- */
.options-container .option-disabled,
.options-container .option-item.option-disabled {
  cursor: default;
  opacity: 0.75;
  pointer-events: none;
}

.options-container .option-disabled:hover,
.options-container .option-item.option-disabled:hover {
  border-color: var(--color-border-light);
  background: var(--color-surface);
  box-shadow: none;
}


/* ----------------------------------------------------------
   Option – Icon / marker text fallback
   JS may inject .option-marker or .option-letter
   ---------------------------------------------------------- */
.option-marker,
.option-letter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-primary-lighter);
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  line-height: 1;
}


/* ----------------------------------------------------------
   Feedback Area
   ---------------------------------------------------------- */
.feedback-area {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
  margin-bottom: var(--space-4);
  animation: feedbackSlide 350ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes feedbackSlide {
  from {
    opacity: 0;
    transform: translateY(-8px);
    max-height: 0;
  }
  to {
    opacity: 1;
    transform: translateY(0);
    max-height: 200px;
  }
}

.feedback-icon {
  font-size: 1.25rem;
  line-height: 1;
  margin-bottom: var(--space-1);
}

.feedback-text {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-semibold);
  line-height: 1.5;
}

/* Feedback colour variants – applied via icon/text content by JS.
   We add context styles so if the feedback-area contains
   "Richtig" or "✓" etc., it looks appropriate. */


/* ----------------------------------------------------------
   Explanation Area
   ---------------------------------------------------------- */
.explanation-area {
  padding: var(--space-5);
  background: var(--color-info-bg);
  border: 1px solid var(--color-info-border);
  border-radius: var(--radius-md);
  margin-top: var(--space-2);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  animation: feedbackSlide 400ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.explanation-area strong {
  display: block;
  margin-bottom: var(--space-2);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.explanation-area p {
  margin: 0;
}

#explanation-text:empty {
  display: none;
}


/* ----------------------------------------------------------
   Quiz Footer
   ---------------------------------------------------------- */
.quiz-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-4) 0;
}

.quiz-footer .btn {
  flex: 1 1 auto;
  min-width: 0;
}

@media (max-width: 480px) {
  .quiz-footer .btn {
    flex: 1 1 100%;
  }
}

@media (min-width: 640px) {
  .quiz-footer .btn {
    flex: none;
  }

  #btn-submit { min-width: 180px; }
  #btn-next   { min-width: 140px; }
  #btn-finish { min-width: 160px; }
}


/* ----------------------------------------------------------
   Result Screen
   ---------------------------------------------------------- */
.result-card {
  text-align: center;
}

.result-icon {
  font-size: 3.5rem;
  line-height: 1;
  margin-bottom: var(--space-4);
}

.result-score {
  font-size: 2.25rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: 1.15;
  margin-bottom: var(--space-1);
  font-variant-numeric: tabular-nums;
}

.result-percent {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.result-grade {
  font-size: 1.0625rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

@media (min-width: 640px) {
  .result-score { font-size: 2.75rem; }
  .result-percent { font-size: 1.25rem; }
}


/* ----------------------------------------------------------
   Result Summary (Stats Row)
   ---------------------------------------------------------- */
.result-summary {
  display: flex;
  justify-content: center;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
}

.stat-value {
  font-size: 1.5rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.8125rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Colour the stat values */
#stat-correct { color: var(--color-correct); }
#stat-wrong   { color: var(--color-wrong); }
#stat-total   { color: var(--color-primary); }

@media (max-width: 480px) {
  .result-summary {
    gap: var(--space-5);
  }
  .stat-value { font-size: 1.25rem; }
}


/* ----------------------------------------------------------
   Result Actions
   ---------------------------------------------------------- */
.result-actions {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.result-actions .btn {
  width: 100%;
}

@media (min-width: 640px) {
  .result-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3);
  }

  .result-actions .btn:last-child {
    grid-column: 1 / -1;
    max-width: 280px;
    justify-self: center;
  }

  .result-actions .btn {
    width: auto;
  }
}


/* ----------------------------------------------------------
   Review Container
   ---------------------------------------------------------- */
.review-container {
  margin-top: var(--space-6);
  animation: screenIn 400ms cubic-bezier(0.22, 1, 0.36, 1) both;
}

.review-container h3 {
  margin-bottom: var(--space-5);
}

#review-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* Review question card – generated by JS */
#review-list .review-item,
#review-list .review-question {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-card);
  font-size: 0.9rem;
  line-height: 1.6;
}

#review-list .review-question-header {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  font-size: 0.8125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

#review-list .review-question-text {
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-3);
}

#review-list .review-answer {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-1);
  font-size: 0.875rem;
}

#review-list .review-answer--user {
  background: var(--color-primary-lighter);
  border-left: 3px solid var(--color-primary-light);
}

#review-list .review-answer--user.review-answer--correct {
  background: var(--color-correct-bg);
  border-left-color: var(--color-correct);
}

#review-list .review-answer--user.review-answer--wrong {
  background: var(--color-wrong-bg);
  border-left-color: var(--color-wrong);
}

#review-list .review-answer--correct-answer {
  background: var(--color-correct-bg);
  border-left: 3px solid var(--color-correct);
  color: var(--color-correct);
}

#review-list .review-answer-label {
  font-weight: var(--font-weight-semibold);
  flex-shrink: 0;
}

#review-list .review-explanation {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-light);
  font-size: 0.85rem;
  color: var(--color-text-secondary);
}

#review-list .review-explanation strong {
  color: var(--color-text-muted);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Close button */
#btn-review-close {
  margin-top: var(--space-5);
  display: block;
  margin-left: auto;
  margin-right: auto;
}


/* ----------------------------------------------------------
   Utility Classes
   ---------------------------------------------------------- */
.text-center { text-align: center; }
.text-muted  { color: var(--color-text-muted); }
.text-small  { font-size: 0.875rem; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }


/* ----------------------------------------------------------
   Focus-Visible (Accessibility)
   ---------------------------------------------------------- */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

/* Remove the default focus ring for mouse users */
:focus:not(:focus-visible) {
  box-shadow: none;
}


/* ----------------------------------------------------------
   Print Styles
   ---------------------------------------------------------- */
@media print {
  body {
    background: white;
    color: black;
    font-size: 11pt;
  }

  #app {
    max-width: 100%;
    padding: 0;
  }

  .btn,
  .quiz-footer,
  #btn-start,
  .result-actions {
    display: none !important;
  }

  .screen {
    display: block !important;
    opacity: 1 !important;
    animation: none !important;
  }

  .card {
    box-shadow: none;
    border: 1px solid #ccc;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .options-container .option,
  .options-container label {
    border-color: #ccc;
    break-inside: avoid;
  }

  .progress-bar {
    display: none;
  }
}


/* ----------------------------------------------------------
   Selection Styling
   ---------------------------------------------------------- */
::selection {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}


/* ----------------------------------------------------------
   Scrollbar Styling (Webkit)
   ---------------------------------------------------------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}


/* ----------------------------------------------------------
   Smooth Scroll Behaviour for Review
   ---------------------------------------------------------- */
html {
  scroll-behavior: smooth;
}


/* ----------------------------------------------------------
   Additional Responsive Tweaks
   ---------------------------------------------------------- */
@media (max-width: 400px) {
  #app {
    padding: var(--space-4) var(--space-3);
  }

  .card {
    padding: var(--space-4);
    border-radius: var(--radius-md);
  }

  .question-text {
    font-size: 1rem;
  }

  .options-container .option,
  .options-container .option-item {
    padding: var(--space-3);
    font-size: 0.875rem;
  }

  .result-score {
    font-size: 1.75rem;
  }
}


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

  html {
    scroll-behavior: auto;
  }
}


/* ----------------------------------------------------------
   End of Styles
   ---------------------------------------------------------- */