/* ============================================
   PCLA Quiz — Design System v1.0.0
   ============================================ */

@layer reset, tokens, base, layout, components, pages, utilities, overrides;

/* ============================================
   RESET
   ============================================ */

@layer reset {
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    color-scheme: light dark;
    text-wrap: pretty;
  }

  img,
  picture,
  video,
  canvas,
  svg {
    display: block;
    max-inline-size: 100%;
    block-size: auto;
  }

  button {
    cursor: pointer;
  }

  button,
  input,
  select,
  textarea {
    font: inherit;
  }
}

/* ============================================
   DESIGN TOKENS & CUSTOM PROPERTIES
   ============================================ */

@layer tokens {
  :root {
    /* Typography */
    --font-family: system-ui, sans-serif;
    --font-size-xs:   clamp(0.875rem, 0.857rem + 0.09vw, 0.9375rem);
    --font-size-sm:   clamp(1rem, 0.964rem + 0.18vw, 1.125rem);
    --font-size-base: clamp(1.125rem, 1.089rem + 0.18vw, 1.25rem);
    --font-size-lg:   clamp(1.375rem, 1.304rem + 0.36vw, 1.625rem);
    --font-size-xl:   clamp(1.75rem, 1.607rem + 0.71vw, 2.25rem);
    --font-size-2xl:  clamp(2.25rem, 2.036rem + 1.07vw, 3rem);
    --font-size-3xl:  clamp(3rem, 2.714rem + 1.43vw, 4rem);

    /* Line heights */
    --line-height-tight:   1.2;
    --line-height-normal:  1.5;
    --line-height-relaxed: 1.65;

    /* Font weights */
    --font-weight-normal:   400;
    --font-weight-medium:   500;
    --font-weight-semibold: 600;
    --font-weight-bold:     700;

    /* Spacing (fluid, Utopia 320 → 1440) */
    --space-2xs: clamp(0.25rem, 0.214rem + 0.18vw, 0.375rem);
    --space-xs:  clamp(0.5rem, 0.429rem + 0.36vw, 0.75rem);
    --space-sm:  clamp(0.75rem, 0.679rem + 0.36vw, 1rem);
    --space-md:  clamp(1rem, 0.857rem + 0.71vw, 1.5rem);
    --space-lg:  clamp(1.5rem, 1.357rem + 0.71vw, 2rem);
    --space-xl:  clamp(2rem, 1.714rem + 1.43vw, 3rem);
    --space-2xl: clamp(3rem, 2.714rem + 1.43vw, 4rem);
    --space-3xl: clamp(4rem, 3.429rem + 2.86vw, 6rem);

    /* Radius */
    --radius-sm:   0.5rem;
    --radius-md:   0.75rem;
    --radius-lg:   1rem;
    --radius-xl:   1.5rem;
    --radius-full: 9999px;

    /* Transitions — duration */
    --duration-instant: 100ms;
    --duration-fast:    160ms;
    --duration-base:    240ms;
    --duration-slow:    360ms;
    --duration-slower:  500ms;

    /* Transitions — easing */
    --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-in:      cubic-bezier(0.4, 0, 1, 1);
    --ease-out:     cubic-bezier(0, 0, 0.2, 1);
    --ease-in-out:  cubic-bezier(0.4, 0, 0.2, 1);

    /* Shadows */
    --shadow-xs: 0 1px 2px var(--color-shadow);

    --shadow-sm: 0 1px 3px var(--color-shadow),
                 0 1px 2px var(--color-shadow);

    --shadow-md: 0 4px 12px var(--color-shadow-lg),
                 0 2px 4px var(--color-shadow);

    --shadow-lg: 0 10px 30px var(--color-shadow-lg),
                 0 4px 8px var(--color-shadow);

    --shadow-xl: 0 20px 50px var(--color-shadow-lg),
                 0 8px 16px var(--color-shadow);

    /* Container */
    --container-max: 80rem;
    --container-padding: var(--space-xl);

    /* -- Palette primitive -- */
    --raw-blue-600: oklch(0.45 0.19 264);
    --raw-blue-500: oklch(0.55 0.19 264);
    --raw-blue-400: oklch(0.72 0.14 250);
    --raw-blue-300: oklch(0.80 0.10 250);

    --raw-violet-600: oklch(0.44 0.27 295);
    --raw-violet-400: oklch(0.69 0.17 295);

    --raw-green-800: oklch(0.36 0.10 155);
    --raw-green-300: oklch(0.85 0.15 155);

    --raw-amber-800: oklch(0.43 0.11 70);
    --raw-amber-300: oklch(0.90 0.10 90);

    --raw-danger-700: oklch(0.44 0.18 25);
    --raw-danger-300: oklch(0.72 0.17 25);

    --raw-neutral-950: oklch(0.16 0.02 280);
    --raw-neutral-800: oklch(0.35 0.03 280);
    --raw-neutral-600: oklch(0.45 0.03 280);
    --raw-neutral-200: oklch(0.90 0.01 265);
    --raw-neutral-100: oklch(0.94 0.01 265);
    --raw-neutral-50:  oklch(0.97 0.01 265);
  }

  /* ----- Light Theme ----- */
  [data-theme="light"] {
    /* -- Texte -- */
    --color-text:           var(--raw-neutral-950);
    --color-text-secondary: var(--raw-neutral-800);
    --color-text-muted:     var(--raw-neutral-600);

    /* -- Fonds -- */
    --color-bg:             var(--raw-neutral-50);
    --color-bg-elevated:    oklch(1 0 0);
    --color-bg-hover:       var(--raw-neutral-100);
    --color-bg-alt:         oklch(0.95 0.02 265);

    /* -- Bordures -- */
    --color-border:         var(--raw-neutral-200);
    --color-border-hover:   oklch(0.76 0.03 270);

    /* -- Marque -- */
    --color-primary:        var(--raw-blue-600);
    --color-primary-hover:  color-mix(in oklch, var(--color-primary), black 15%);
    --color-primary-text:   oklch(1 0 0);
    --color-accent:         var(--raw-violet-600);

    /* -- Fonctionnelles -- */
    --color-success:        var(--raw-green-800);
    --color-success-bg:     oklch(0.97 0.03 155);
    --color-success-border: oklch(0.85 0.12 160);

    --color-warning:        var(--raw-amber-800);
    --color-warning-bg:     oklch(0.98 0.03 90);
    --color-warning-border: oklch(0.88 0.10 70);

    --color-danger:         var(--raw-danger-700);
    --color-danger-bg:      oklch(0.97 0.01 25);
    --color-danger-border:  oklch(0.83 0.10 22);

    /* -- UI -- */
    --color-focus:          var(--raw-blue-400);
    --color-header-bg:      oklch(1 0 0 / 0.85);
    --color-shadow:         oklch(0 0 0 / 0.08);
    --color-shadow-lg:      oklch(0 0 0 / 0.12);

    /* -- Quiz-specific -- */
    --color-highlight:      oklch(0.95 0.02 265);
    --color-checkbox-bg:    var(--raw-neutral-200);
    --color-checkbox-checked: var(--raw-blue-600);
    --color-progress-bg:    var(--raw-neutral-200);
  }

  /* ----- Dark Theme ----- */
  [data-theme="dark"] {
    /* -- Texte -- */
    --color-text:           oklch(0.93 0.02 280);
    --color-text-secondary: oklch(0.73 0.04 275);
    --color-text-muted:     oklch(0.61 0.04 275);

    /* -- Fonds -- */
    --color-bg:             oklch(0.15 0.02 270);
    --color-bg-elevated:    oklch(0.20 0.03 275);
    --color-bg-hover:       oklch(0.25 0.04 270);
    --color-bg-alt:         oklch(0.22 0.04 270);

    /* -- Bordures -- */
    --color-border:         oklch(0.30 0.04 270);
    --color-border-hover:   oklch(0.40 0.05 270);

    /* -- Marque -- */
    --color-primary:        var(--raw-blue-400);
    --color-primary-hover:  var(--raw-blue-300);
    --color-primary-text:   oklch(0.15 0.02 270);
    --color-accent:         var(--raw-violet-400);

    /* -- Fonctionnelles -- */
    --color-success:        var(--raw-green-300);
    --color-success-bg:     oklch(0.18 0.05 155);
    --color-success-border: oklch(0.36 0.10 155);

    --color-warning:        var(--raw-amber-300);
    --color-warning-bg:     oklch(0.18 0.04 80);
    --color-warning-border: oklch(0.40 0.08 60);

    --color-danger:         var(--raw-danger-300);
    --color-danger-bg:      oklch(0.16 0.04 20);
    --color-danger-border:  oklch(0.38 0.12 20);

    /* -- UI -- */
    --color-focus:          var(--raw-blue-300);
    --color-header-bg:      oklch(0.15 0.02 270 / 0.85);
    --color-shadow:         oklch(0 0 0 / 0.3);
    --color-shadow-lg:      oklch(0 0 0 / 0.5);

    /* -- Quiz-specific -- */
    --color-highlight:      oklch(0.22 0.04 270);
    --color-checkbox-bg:    oklch(0.30 0.04 270);
    --color-checkbox-checked: var(--raw-blue-400);
    --color-progress-bg:    oklch(0.30 0.04 270);
  }
}

/* ============================================
   BASE
   ============================================ */

@layer base {
  body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-bg);
    transition:
      background-color var(--duration-base) var(--ease-default),
      color var(--duration-base) var(--ease-default);
    min-block-size: 100vh;
    display: flex;
    flex-direction: column;
  }

  :focus-visible {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
    border-radius: var(--radius-sm);
  }
}

/* ============================================
   LAYOUT
   ============================================ */

@layer layout {
  .container {
    inline-size: 100%;
    max-inline-size: var(--container-max);
    margin-inline: auto;
    padding-inline: var(--container-padding);
  }

  .main {
    flex: 1;
    padding-block: var(--space-2xl) var(--space-3xl);
  }
}

/* ============================================
   COMPONENTS
   ============================================ */

@layer components {

  /* ---- Accessibility ---- */

  .skip-link {
    position: absolute;
    inset-block-start: -100%;
    inset-inline-start: var(--space-md);
    z-index: 9999;
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-primary);
    color: var(--color-primary-text);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: inset-block-start var(--duration-fast) var(--ease-default);
  }

  .skip-link:focus {
    inset-block-start: var(--space-md);
  }

  /* ---- Header ---- */

  .header {
    position: sticky;
    inset-block-start: 0;
    z-index: 100;
    background: var(--color-header-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-block-end: 1px solid var(--color-border);
    transition:
      background-color var(--duration-base) var(--ease-default),
      border-color var(--duration-base) var(--ease-default);
  }

  .header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-md);
    padding-block: var(--space-sm);
  }

  .header__brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
  }

  .header__icon {
    color: var(--color-primary);
    flex-shrink: 0;
  }

  .header__title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    letter-spacing: -0.02em;
  }

  /* ---- Theme Toggle ---- */

  .theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    inline-size: 2.75rem;
    block-size: 2.75rem;
    padding: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: var(--color-bg-elevated);
    color: var(--color-text-secondary);
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--duration-fast) var(--ease-default),
                border-color var(--duration-fast) var(--ease-default),
                color var(--duration-fast) var(--ease-default),
                transform var(--duration-fast) var(--ease-default);
  }

  .theme-toggle:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-border-hover);
    transform: scale(1.05);
  }

  .theme-toggle:active {
    transform: scale(0.95);
  }

  /* Icon visibility */
  [data-theme="light"] .theme-toggle__icon--sun  { display: none;  }
  [data-theme="light"] .theme-toggle__icon--moon { display: block; }
  [data-theme="dark"]  .theme-toggle__icon--sun  { display: block; }
  [data-theme="dark"]  .theme-toggle__icon--moon { display: none;  }

  /* ---- Hero ---- */

  .hero {
    text-align: center;
    margin-block-end: var(--space-2xl);
  }

  .hero__title {
    font-size: var(--font-size-2xl);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: var(--line-height-tight);
    margin-block-end: var(--space-md);
  }

  .highlight {
    color: var(--color-primary);
  }

  .hero__subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-inline-size: 52rem;
    margin-inline: auto;
  }

  /* ---- Footer region selector ---- */

  .footer__region {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
    justify-content: center;
  }

  .footer__region-label {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
  }

  .footer__region-select {
    border: 1px solid var(--color-border);
    background: var(--color-bg-elevated);
    color: var(--color-text);
    border-radius: var(--radius-sm);
    padding: 0.45rem 0.75rem;
    font-size: var(--font-size-sm);
  }

  /* ---- Steps (Comment ca marche) ---- */

  .steps {
    margin-block-end: var(--space-2xl);
  }

  .steps__list {
    list-style: none;
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-lg);
    counter-reset: step;
  }

  @media (min-width: 900px) {
    .steps__list {
      grid-template-columns: repeat(3, 1fr);
    }
  }

  .steps__item {
    display: flex;
    flex-direction: row;
    align-items: center;
    text-align: start;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--duration-base) var(--ease-default);
  }

  @media (min-width: 900px) {
    .steps__item {
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding: var(--space-lg);
    }
  }

  .steps__item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .steps__icon {
    inline-size: 3.5rem;
    block-size: 3.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-highlight);
    color: var(--color-primary);
    border-radius: 50%;
  }

  .steps__number {
    font-size: var(--font-size-sm);
    font-weight: 800;
    color: var(--color-primary);
    background: var(--color-highlight);
    inline-size: 1.75rem;
    block-size: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1.5px solid var(--color-primary);
  }

  .steps__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-medium);
    line-height: 1.4;
  }

  /* ---- Buttons ---- */

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2xs);
    padding: var(--space-sm) var(--space-lg);
    min-block-size: 2.75rem;
    font-family: inherit;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    transition: background var(--duration-fast) var(--ease-default),
                color var(--duration-fast) var(--ease-default),
                border-color var(--duration-fast) var(--ease-default),
                transform var(--duration-fast) var(--ease-default),
                box-shadow var(--duration-fast) var(--ease-default);
  }

  .btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
  }

  .btn:active {
    transform: scale(0.97);
    box-shadow: none;
  }

  .btn--primary {
    background: var(--color-primary);
    color: var(--color-primary-text);
    border-color: var(--color-primary);
  }

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

  .btn--secondary {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: var(--color-border);
  }

  .btn--secondary:hover {
    background: var(--color-bg-hover);
    border-color: var(--color-border-hover);
    color: var(--color-text);
  }

  .btn--danger {
    background: var(--color-danger);
    color: oklch(1 0 0);
    border-color: var(--color-danger);
  }

  .btn--danger:hover {
    background: color-mix(in oklch, var(--color-danger), black 15%);
  }

  .btn--ghost {
    background: transparent;
    color: var(--color-text-muted);
    border-color: transparent;
    font-size: var(--font-size-sm);
    padding: var(--space-xs) var(--space-md);
  }

  .btn--ghost:hover {
    background: var(--color-bg-hover);
    color: var(--color-text);
    text-decoration: underline;
  }

  /* ---- Badges ---- */

  .badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2xs);
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-tight);
    white-space: nowrap;
    flex-shrink: 0;
    border: 1px solid transparent;
    margin-block-start: 0.15rem;
  }

  .badge--critical {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border-color: var(--color-danger-border);
  }

  .badge--high {
    background: var(--color-warning-bg);
    color: var(--color-warning);
    border-color: var(--color-warning-border);
  }

  .badge--medium {
    background: var(--color-highlight);
    color: var(--color-primary);
    border-color: var(--color-border);
  }

  .badge--low {
    background: var(--color-success-bg);
    color: var(--color-success);
    border-color: var(--color-success-border);
  }

  /* ---- Toast ---- */

  .toast {
    position: fixed;
    inset-block-end: var(--space-xl);
    inset-inline-start: 50%;
    transform: translateX(-50%) translateY(1rem);
    background: var(--color-danger);
    color: oklch(1 0 0);
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    box-shadow: var(--shadow-lg);
    z-index: 200;
    opacity: 0;
    transition:
      opacity var(--duration-base) var(--ease-default),
      transform var(--duration-base) var(--ease-default);
    cursor: pointer;
    max-inline-size: calc(100vw - 2rem);
    text-align: center;
  }

  .toast--visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }

  /* ---- Footer ---- */

  .footer {
    background: var(--color-bg-elevated);
    border-block-start: 1px solid var(--color-border);
    padding-block: var(--space-xl);
    text-align: center;
    transition: border-color var(--duration-base) var(--ease-default);
  }

  .footer__inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    text-align: center;
  }

  .footer__text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
  }

  .footer__links {
    display: flex;
    justify-content: center;
    gap: var(--space-sm) var(--space-md);
    flex-wrap: wrap;
  }

  .footer__links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    transition: color var(--duration-fast) var(--ease-default);
  }

  .footer__links a:hover {
    color: var(--color-primary);
  }

  .footer__copy {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
  }

  /* ---- FAQ ---- */

  .faq {
    margin-block-start: var(--space-3xl);
    max-inline-size: 52rem;
    margin-inline: auto;
  }

  .faq__title {
    font-size: var(--font-size-xl);
    font-weight: 800;
    text-align: center;
    margin-block-end: var(--space-lg);
    letter-spacing: -0.02em;
  }

  .faq__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  .faq__item {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: box-shadow var(--duration-fast) var(--ease-default);
  }

  .faq__item:hover {
    box-shadow: var(--shadow-sm);
  }

  .faq__item[open] {
    box-shadow: var(--shadow-md);
  }

  .faq__question {
    padding: var(--space-md) var(--space-lg);
    font-weight: var(--font-weight-bold);
    font-size: var(--font-size-base);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    transition: color var(--duration-fast) var(--ease-default);
  }

  .faq__question::-webkit-details-marker {
    display: none;
  }

  .faq__question::before {
    content: "+";
    display: flex;
    align-items: center;
    justify-content: center;
    inline-size: 1.5rem;
    block-size: 1.5rem;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--color-primary);
    flex-shrink: 0;
    transition: transform var(--duration-fast) var(--ease-default);
  }

  .faq__item[open] > .faq__question::before {
    transform: rotate(45deg);
  }

  .faq__question:hover {
    color: var(--color-primary);
  }

  .faq__answer {
    padding: 0 var(--space-lg) var(--space-lg);
    padding-inline-start: calc(var(--space-lg) + 1.5rem + var(--space-sm));
    color: var(--color-text-secondary);
    line-height: var(--line-height-relaxed);
    font-size: var(--font-size-sm);
  }
}

/* ============================================
   PAGES — Quiz-specific
   ============================================ */

@layer pages {

  /* ---- Quiz actions ---- */

  .quiz__actions {
    display: flex;
    gap: var(--space-md);
    margin-block-start: var(--space-xl);
    flex-wrap: wrap;
  }

  /* ---- Quiz fieldset / legend ---- */

  .quiz__fieldset {
    border: none;
  }

  .quiz__legend {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-block-end: var(--space-lg);
    display: block;
  }

  /* ---- Progress ---- */

  .quiz__progress {
    margin-block-end: var(--space-lg);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
  }

  .quiz__progress-bar {
    block-size: 0.375rem;
    background: var(--color-progress-bg);
    border-radius: var(--radius-full);
    margin-block-start: var(--space-xs);
    overflow: hidden;
  }

  .quiz__progress-fill {
    block-size: 100%;
    background: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--duration-slow) var(--ease-default);
  }

  /* ---- Quiz list ---- */

  .quiz__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
  }

  /* ---- Item — stagger entrance animation ---- */

  .quiz__item {
    display: flex;
    border-radius: var(--radius-md);
    transition: transform var(--duration-fast) var(--ease-default);
    animation: fadeInUp var(--duration-slow) var(--ease-out) both;
  }

  /* ---- Label ---- */

  .quiz__label {
    display: flex;
    flex: 1;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-elevated);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-default);
    user-select: none;
    box-shadow: var(--shadow-sm);
  }

  .quiz__label:hover {
    border-color: var(--color-primary);
    background: var(--color-highlight);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
  }

  /* ---- Hide native checkbox ---- */

  .quiz__checkbox {
    position: absolute;
    opacity: 0;
    inline-size: 0;
    block-size: 0;
  }

  /* ---- Custom checkmark ---- */

  .quiz__checkmark {
    flex-shrink: 0;
    inline-size: 1.625rem;
    block-size: 1.625rem;
    border: 2.5px solid var(--color-text-secondary);
    border-radius: var(--radius-sm);
    background: var(--color-bg-elevated);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--duration-fast) var(--ease-default);
    margin-block-start: 0.1rem;
    position: relative;
  }

  .quiz__checkmark::after {
    content: "";
    inline-size: 0.375rem;
    block-size: 0.625rem;
    border: solid var(--color-primary-text);
    border-width: 0 2.5px 2.5px 0;
    transform: rotate(45deg) scale(0);
    transition: transform var(--duration-fast) var(--ease-default);
    position: absolute;
    inset-block-start: 0.15rem;
  }

  /* ---- Checked state ---- */

  .quiz__checkbox:checked ~ .quiz__checkmark {
    background: var(--color-checkbox-checked);
    border-color: var(--color-checkbox-checked);
    animation: checkBounce 300ms var(--ease-default);
  }

  .quiz__checkbox:checked ~ .quiz__checkmark::after {
    transform: rotate(45deg) scale(1);
  }

  .quiz__checkbox:checked ~ .quiz__text {
    font-weight: var(--font-weight-semibold);
  }

  /* Label selected state */
  .quiz__checkbox:checked + .quiz__checkmark + .quiz__number + .quiz__text,
  .quiz__checkbox:checked + .quiz__checkmark {
    /* styling handled above */
  }

  .quiz__label:has(.quiz__checkbox:checked) {
    border-color: var(--color-primary);
    background: var(--color-highlight);
  }

  /* ---- Focus ---- */

  .quiz__checkbox:focus-visible ~ .quiz__checkmark {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
  }

  /* ---- Number badge ---- */

  .quiz__number {
    flex-shrink: 0;
    inline-size: 1.75rem;
    block-size: 1.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    background: var(--color-highlight);
    border-radius: 50%;
    margin-block-start: 0;
    border: 1.5px solid var(--color-primary);
  }

  /* ---- Question text ---- */

  .quiz__text {
    flex: 1;
    padding-block-start: 0.1rem;
    transition: font-weight var(--duration-fast) var(--ease-default);
  }

  /* ============================================
     QUIZ — MODE CARTE (une question a la fois)
     ============================================ */

  /* Wrapper centre */
  .quiz__card-wrapper {
    display: flex;
    justify-content: center;
    padding: var(--space-sm) 0 var(--space-xl);
  }

  /* Carte principale */
  .quiz__card {
    inline-size: 100%;
    max-inline-size: 42rem;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
    animation: cardIn 280ms var(--ease-out) both;
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
  }

  @keyframes cardIn {
    from {
      opacity: 0;
      transform: translateY(12px) scale(0.98);
    }
    to {
      opacity: 1;
      transform: translateY(0) scale(1);
    }
  }

  /* En-tete de carte */
  .quiz__card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
  }

  .quiz__card-step {
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-semibold);
  }

  .quiz__card-step strong {
    color: var(--color-primary);
    font-size: var(--font-size-base);
  }

  .quiz__card-answered {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
  }

  /* Points de navigation */
  .quiz__dots {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    justify-content: center;
  }

  .quiz__dot {
    inline-size: 0.55rem;
    block-size: 0.55rem;
    border-radius: 50%;
    background: var(--color-progress-bg);
    border: 1.5px solid var(--color-border);
    transition: all var(--duration-fast) var(--ease-default);
    flex-shrink: 0;
  }

  .quiz__dot--current {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: scale(1.4);
  }

  .quiz__dot--yes {
    background: var(--color-danger);
    border-color: var(--color-danger);
    opacity: 0.75;
  }

  .quiz__dot--no {
    background: var(--color-text-muted);
    border-color: var(--color-text-muted);
    opacity: 0.5;
  }

  .quiz__dot--skip {
    background: var(--color-border-hover);
    border-color: var(--color-border-hover);
    opacity: 0.6;
  }

  /* Texte de la question */
  .quiz__card-text {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    text-align: center;
    padding-block: var(--space-sm);
  }

  /* Conteneur des boutons Oui / Non */
  .quiz__card-choices {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
  }

  /* Base commune Oui / Non */
  .btn--card-choice {
    flex: 1;
    min-inline-size: 10rem;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-bold);
    border-radius: var(--radius-lg);
    justify-content: center;
    transition: all var(--duration-fast) var(--ease-default);
  }

  .btn--card-choice svg {
    flex-shrink: 0;
  }

  /* Boutons Oui / Non / Je ne sais pas — style neutre identique */
  .btn--card-yes,
  .btn--card-no,
  .btn--card-skip {
    background: var(--color-bg-hover);
    color: var(--color-text-secondary);
    border-color: var(--color-border);
  }

  .btn--card-yes:hover,
  .btn--card-no:hover,
  .btn--card-skip:hover,
  .btn--card-yes.btn--card-selected,
  .btn--card-no.btn--card-selected,
  .btn--card-skip.btn--card-selected {
    background: var(--color-primary);
    color: var(--color-primary-text);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
  }

  /* Je ne sais pas — seul sur sa ligne */
  .btn--card-skip {
    flex-basis: 100%;
  }

  /* Navigation de carte */
  .quiz__card-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
  }

  .quiz__card-nav .btn {
    flex: 1;
    min-inline-size: 8rem;
  }

  /* Bouton Recommencer (discret) */
  .quiz__card-reset {
    text-align: center;
  }

  /* Badge "auto-detecte" */
  .detect-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: var(--font-weight-bold);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-primary);
    background: var(--color-highlight);
    border: 1px solid var(--color-primary);
    border-radius: var(--radius-full);
    padding: 0.1rem 0.5rem;
    margin-inline-start: var(--space-xs);
    vertical-align: middle;
    user-select: none;
  }

  /* ============================================
     RESULT
     ============================================ */

  .result {
    margin-block-start: var(--space-2xl);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    animation: slideUp var(--duration-slow) var(--ease-out);
    scroll-margin-block-start: 5rem;
  }

  .result:focus {
    outline: none;
  }

  .result--danger {
    background: var(--color-danger-bg);
    border: 2px solid var(--color-danger-border);
  }

  .result--warning {
    background: var(--color-warning-bg);
    border: 2px solid var(--color-warning-border);
  }

  .result--success {
    background: var(--color-success-bg);
    border: 2px solid var(--color-success-border);
  }

  .result__title {
    font-size: var(--font-size-xl);
    font-weight: 800;
    margin-block-end: var(--space-md);
  }

  .result--danger .result__title {
    color: var(--color-danger);
  }

  .result--warning .result__title {
    color: var(--color-warning);
  }

  .result--success .result__title {
    color: var(--color-success);
  }

  /* Gauge */
  .result__gauge {
    display: flex;
    justify-content: center;
    margin-block-end: var(--space-md);
  }

  .gauge {
    inline-size: 8rem;
    block-size: 8rem;
  }

  .gauge__fill {
    animation: gaugeAnim 1s var(--ease-out) forwards;
  }

  @keyframes gaugeAnim {
    to {
      stroke-dashoffset: var(--gauge-offset);
    }
  }

  .result__score {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    margin-block-end: var(--space-md);
    color: var(--color-text-secondary);
  }

  .result__message {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-inline-size: 48rem;
    margin-inline: auto;
    margin-block-end: var(--space-lg);
    line-height: var(--line-height-relaxed);
  }

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

  .result__actions .btn {
    min-inline-size: 16rem;
  }

  /* Result details / breakdown */
  .result__details {
    margin-block-start: var(--space-lg);
    text-align: start;
    max-inline-size: 48rem;
    margin-inline: auto;
  }

  .result__details-toggle {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    cursor: pointer;
    padding-block: var(--space-sm);
    list-style: none;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
  }

  .result__details-toggle::before {
    content: ">";
    display: inline-block;
    transition: transform var(--duration-fast) var(--ease-default);
    font-weight: var(--font-weight-bold);
  }

  .result__details[open] > .result__details-toggle::before {
    transform: rotate(90deg);
  }

  .result__details-toggle::-webkit-details-marker {
    display: none;
  }

  .result__details-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding-block-start: var(--space-sm);
  }

  .result__details-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
  }

  .result__details-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
    flex-wrap: wrap;
  }

  .result__details-num {
    font-weight: 800;
    color: var(--color-text-muted);
    flex-shrink: 0;
    min-inline-size: 1.5rem;
  }

  .result__details-text {
    flex: 1;
    min-inline-size: 0;
  }

  .result__details-answer {
    display: inline-flex;
    align-items: center;
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-bold);
    white-space: nowrap;
    flex-shrink: 0;
  }

  .answer--yes {
    background: var(--color-danger-bg);
    color: var(--color-danger);
    border: 1px solid var(--color-danger-border);
  }

  .answer--no {
    background: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success-border);
  }

  .answer--skip {
    background: var(--color-bg-hover);
    color: var(--color-text-muted);
    border: 1px solid var(--color-border);
  }

  .result__details-explanation {
    margin: 0;
    padding-inline-start: 1.5rem;
    font-size: var(--font-size-xs);
    font-style: italic;
    color: var(--color-text-secondary);
    line-height: var(--line-height-normal);
  }

  /* Date du test — visible uniquement a l'impression */
  .result__print-date {
    display: none;
  }

  .result__resources-title {
    margin-block-start: var(--space-lg);
    margin-block-end: var(--space-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    font-weight: var(--font-weight-semibold);
  }

  .result__resources-links {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
  }

  .result__resources-links a {
    color: var(--color-primary);
    text-decoration: none;
    font-size: var(--font-size-sm);
  }

  .result__resources-links a:hover {
    text-decoration: underline;
  }
}

/* ============================================
   UTILITIES
   ============================================ */

@layer utilities {
  .sr-only {
    position: absolute;
    inline-size: 1px;
    block-size: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
  }
}

/* ============================================
   KEYFRAMES
   ============================================ */

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(1.5rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(0.75rem);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes checkBounce {
  0% {
    transform: scale(1);
  }
  40% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
  }
}

/* ============================================
   OVERRIDES — Responsive, Preferences, Print
   ============================================ */

@layer overrides {

  /* ── Mobile (max 480px) ── */
  @media (max-width: 480px) {
    :root {
      --container-padding: var(--space-md);
    }

    .header__title {
      font-size: var(--font-size-sm);
    }

    .main {
      padding-block: var(--space-lg) var(--space-2xl);
    }

    .quiz__label {
      padding: var(--space-sm) var(--space-md);
      gap: var(--space-sm);
    }

    .quiz__number {
      inline-size: 1.5rem;
      block-size: 1.5rem;
      font-size: 0.8125rem;
    }

    .quiz__actions {
      flex-direction: column;
    }

    .btn {
      inline-size: 100%;
    }

    .result {
      padding: var(--space-md);
    }

    .result__actions .btn {
      min-inline-size: auto;
      inline-size: 100%;
    }

    .gauge {
      inline-size: 6rem;
      block-size: 6rem;
    }

    .faq__question {
      padding: var(--space-sm) var(--space-md);
    }

    .faq__answer {
      padding: 0 var(--space-md) var(--space-md);
      padding-inline-start: calc(var(--space-md) + 1.5rem + var(--space-sm));
    }
  }

  /* ── Tablette portrait (481px – 767px) ── */
  @media (min-width: 481px) and (max-width: 767px) {
    :root {
      --container-padding: var(--space-lg);
    }

    .quiz__actions {
      flex-direction: column;
    }

    .btn {
      inline-size: 100%;
    }

    .result__actions .btn {
      min-inline-size: auto;
      inline-size: 100%;
    }
  }

  /* ── Tablette paysage + petits laptops (768px+) ── */
  @media (min-width: 768px) {
    :root {
      --container-padding: var(--space-xl);
    }

    .quiz__list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: var(--space-sm);
    }

    .result__actions {
      flex-direction: row;
      justify-content: center;
      flex-wrap: wrap;
    }

    .result__actions .btn {
      min-inline-size: auto;
      inline-size: auto;
    }

    .quiz__actions {
      justify-content: flex-start;
    }
  }

  /* ── Grand ecran (1024px+) ── */
  @media (min-width: 1024px) {
    :root {
      --container-padding: var(--space-2xl);
    }

    .quiz__legend {
      font-size: var(--font-size-xl);
    }
  }

  /* ============================================
     HIGH CONTRAST / ACCESSIBILITY
     ============================================ */

  @media (forced-colors: active) {
    .quiz__checkmark {
      border: 2px solid ButtonText;
    }

    .quiz__checkbox:checked ~ .quiz__checkmark {
      background: Highlight;
      border-color: Highlight;
    }

    .btn--primary {
      border: 2px solid ButtonText;
    }

    :focus-visible {
      outline-color: Highlight;
    }
  }

  @media (prefers-contrast: more) {
    :root {
      --color-border: oklch(0.5 0.03 270);
      --color-text-muted: oklch(0.35 0.03 280);
    }
  }

  /* ---- Touch targets ---- */
  @media (pointer: coarse) {
    .quiz__label {
      padding: var(--space-md) var(--space-lg);
      min-block-size: 3.5rem;
    }

    .btn {
      min-block-size: 3rem;
    }

    .theme-toggle {
      inline-size: 3rem;
      block-size: 3rem;
    }
  }

  /* ---- 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;
    }
  }

  /* ============================================
     PRINT
     ============================================ */

  @media print {
    .header,
    .skip-link,
    .steps,
    .quiz,
    .toast,
    .faq,
    .footer,
    .result__actions,
    .result__gauge,
    .result__resources-title,
    .result__resources-links {
      display: none !important;
    }

    body {
      background: #fff;
      color: #000;
      font-size: 11pt;
    }

    .result__print-date {
      display: block !important;
      font-size: 0.9rem;
      color: #555;
      margin-block-end: var(--space-sm);
    }

    .result {
      border: 2px solid #000 !important;
      margin-block-start: 0;
      animation: none;
    }

    .result__details {
      break-before: auto;
    }

    .result__details[open] .result__details-list {
      display: flex;
    }

    .result__details-item {
      break-inside: avoid;
      border: 1px solid #999;
      background: #fff;
    }

    .result__details-explanation {
      color: #333;
    }

    .gauge__fill {
      animation: none;
      stroke-dashoffset: var(--gauge-offset);
    }

    .badge,
    .result__details-answer {
      border: 1px solid #000;
    }

    .hero {
      margin-block-end: var(--space-md);
    }

    .hero__title {
      font-size: 1.5rem;
    }

    a[href^="http"]::after {
      content: " (" attr(href) ")";
      font-size: 0.85em;
      color: #555;
    }

    h1, h2, h3 {
      break-after: avoid;
    }
  }
}