/* ===========================================================
   style.css — design system commun à tout le site.
   Chargé par chaque page via un chemin relatif vers la racine.
   Les sous-projets (games, nuancier, etc.) ajoutent leur CSS
   spécifique après celui-ci.
   =========================================================== */


/* ===========================================================
   1. TOKENS
   =========================================================== */

:root {
  /* Couleurs de rôle (mode clair) */
  --color-bg: #F4F1EA;
  --color-surface: #FAF8F2;
  --color-text: #2C4A6B;
  --color-text-soft: #4A6385;
  --color-text-faint: color-mix(in srgb, var(--color-text) 40%, transparent);
  --color-accent: #b8412a;
  --color-border: color-mix(in srgb, var(--color-text) 12%, transparent);
  --color-border-strong: color-mix(in srgb, var(--color-text) 30%, transparent);

  /* Couleurs d'état */
  --color-success: #2E7F45;
  --color-warning: #F05D3D;
  --color-error: #E2001A;
  --color-info: #4ECDEA;

  /* Espacements */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 32px;
  --space-xl: 64px;

  /* Typographie */
  --font-display: 'Newsreader', Georgia, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  --text-xs: 0.65rem;
  --text-sm: 0.75rem;
  --text-base: 0.875rem;
  --text-md: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.5rem;
  --text-2xl: clamp(1.75rem, 4vw, 2.75rem);
  --text-3xl: clamp(2rem, 6vw, 3.5rem);

  /* Rayons */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-pill: 999px;

  /* Transitions */
  --t-fast: 150ms cubic-bezier(0.2, 0, 0, 1);
  --t-med: 250ms cubic-bezier(0.2, 0, 0, 1);

  /* Overlays */
  --bg-overlay: color-mix(in srgb, var(--color-bg) 88%, transparent);
  --bg-modal-backdrop: color-mix(in srgb, var(--color-text) 35%, transparent);
}

[data-theme="dark"] {
  --color-bg: #1A2638;
  --color-surface: #243149;
  --color-text: #B8C4D9;
  --color-text-soft: #9BAAC4;
  --color-text-faint: #8295AC;
  --color-accent: #726791;
  --color-border: #3A4A66;
  --color-border-strong: #4A6385;

  --color-success: #8BF2C1;
  --color-warning: #FBEE3B;
  --color-error: #FF7878;
  --color-info: #4ECDEA;
}


/* ===========================================================
   2. RESET & BASE
   =========================================================== */

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

html.game-page,
body.game-page {
  overflow: hidden;
}

body {
  font-family: var(--font-display);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: var(--text-md);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--t-med), color var(--t-med);
  overscroll-behavior: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
  padding: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

[hidden],
.hidden {
  display: none !important;
}


/* ===========================================================
   3. LAYOUT PRINCIPAL
   =========================================================== */

.app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
  max-width: 960px;
  margin: 0 auto;
  /* Safe areas iOS (notch, home indicator). */
  padding-top: max(var(--space-md), env(safe-area-inset-top));
  padding-right: max(var(--space-md), env(safe-area-inset-right));
  padding-bottom: max(var(--space-md), env(safe-area-inset-bottom));
  padding-left: max(var(--space-md), env(safe-area-inset-left));
  gap: var(--space-md);
}

.app--fixed {
  height: 100vh;
  height: 100dvh;
  min-height: 0;
}

.app--narrow {
  max-width: 720px;
}

.app--wide {
  max-width: 1440px;
}


/* ===========================================================
   3bis. GRILLE 12 COLONNES

   Usage :
     <div class="grid-12">
       <div class="span-4">Sidebar</div>
       <div class="span-8">Contenu</div>
     </div>

   Variantes : .grid-12--tight (gap serré), .grid-12--loose (gap aéré).
   Sous 768px, tout .span-* repasse en pleine largeur.
   =========================================================== */

.grid-12 {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-md);
}

.grid-12--tight { gap: var(--space-sm); }
.grid-12--loose { gap: var(--space-lg); }

.span-1  { grid-column: span 1; }
.span-2  { grid-column: span 2; }
.span-3  { grid-column: span 3; }
.span-4  { grid-column: span 4; }
.span-5  { grid-column: span 5; }
.span-6  { grid-column: span 6; }
.span-7  { grid-column: span 7; }
.span-8  { grid-column: span 8; }
.span-9  { grid-column: span 9; }
.span-10 { grid-column: span 10; }
.span-11 { grid-column: span 11; }
.span-12 { grid-column: span 12; }

@media (max-width: 768px) {
  [class*="span-"] { grid-column: span 12; }
}


/* ===========================================================
   4. HEADER COMMUN
   =========================================================== */

.header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.header-left {
  display: flex;
  align-items: baseline;
  gap: var(--space-md);
}

.header-right {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.header-fav-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md, 6px);
  color: var(--color-text-soft);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.header-fav-btn:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
  background: var(--color-surface);
}
.header-fav-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  transition: fill 0.15s;
}
.header-fav-btn[aria-pressed="true"] {
  color: var(--color-text);
  border-color: var(--color-text);
  background: var(--color-surface);
}
.header-fav-btn[aria-pressed="true"] svg {
  fill: currentColor;
}

/* Toggle thème jour/nuit.
   Markup attendu :
     <button class="theme-toggle" id="themeToggle" aria-label="…">
       <svg class="icon-moon" …></svg>
       <svg class="icon-sun"  …></svg>
     </button>
   Variante .theme-toggle--fixed : position fixed top-right pour
   les pages sans header (la home). */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  color: var(--color-text-soft);
  transition: color var(--t-fast), border-color var(--t-fast);
}
.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
}
.theme-toggle svg {
  width: 16px;
  height: 16px;
  display: block;
}
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Variante fixed pour les pages sans header (la home). */
.theme-toggle--fixed {
  position: fixed;
  top: var(--space-lg);
  right: var(--space-lg);
  background: var(--color-surface);
  z-index: 100;
}

.site-title {
  font-size: var(--text-base);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-soft);
}
.site-title::before {
  content: "← ";
  color: var(--color-text-faint);
}

.game-title,
.section-title {
  font-size: var(--text-lg);
  font-weight: 600;
  letter-spacing: -0.02em;
}

/* Burger + panneau latéral de navigation.
   Markup attendu :
     <button class="burger" id="burgerBtn" aria-label="Ouvrir le menu"
             aria-expanded="false" aria-controls="menuPanel">
       <span class="burger-lines"><span></span><span></span><span></span></span>
     </button>
     <div class="menu-overlay" id="menuOverlay"></div>
     <aside class="menu-panel" id="menuPanel" aria-hidden="true">
       <div class="menu-section-label">Navigation</div>
       <nav class="menu-nav">
         <a class="menu-link" href="…">Lien 1</a>
         <button class="menu-link">Vue interne</button>
       </nav>
       <div class="menu-footer">Nogegon</div>
     </aside>
   Le JS toggle la classe .is-open sur les trois éléments.

   Variante .burger--fixed : position fixed top-left pour les pages
   sans header (la home). */
.burger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  color: var(--color-text-soft);
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.burger:hover {
  border-color: var(--color-text);
  color: var(--color-text);
}
.burger:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.burger-lines {
  position: relative;
  width: 16px;
  height: 12px;
}
.burger-lines span {
  position: absolute;
  left: 0;
  width: 100%;
  height: 1.5px;
  background: currentColor;
  transition: transform var(--t-med), opacity var(--t-fast), top var(--t-med);
}
.burger-lines span:nth-child(1) { top: 0; }
.burger-lines span:nth-child(2) { top: 5px; }
.burger-lines span:nth-child(3) { top: 10px; }

.burger.is-open .burger-lines span:nth-child(1) {
  top: 5px;
  transform: rotate(45deg);
}
.burger.is-open .burger-lines span:nth-child(2) {
  opacity: 0;
}
.burger.is-open .burger-lines span:nth-child(3) {
  top: 5px;
  transform: rotate(-45deg);
}

/* Variante fixed pour les pages sans header (la home). */
.burger--fixed {
  position: fixed;
  top: var(--space-lg);
  left: var(--space-lg);
  background: var(--color-surface);
  z-index: 200;
}

.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0);
  pointer-events: none;
  transition: background var(--t-med);
  z-index: 150;
}
.menu-overlay.is-open {
  background: var(--bg-modal-backdrop);
  pointer-events: auto;
}

.menu-panel {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: 320px;
  max-width: 85vw;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border);
  transform: translateX(-100%);
  transition: transform var(--t-med);
  z-index: 175;
  padding: 96px var(--space-lg) var(--space-lg);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.menu-panel.is-open {
  transform: translateX(0);
}

.menu-section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin: 0 0 var(--space-sm);
}
.menu-section-label--secondary {
  margin-top: var(--space-lg);
}

.menu-nav {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--color-border);
}

.menu-link {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-soft);
  text-decoration: none;
  text-align: left;
  padding: 14px 0;
  border: none;
  border-bottom: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  transition: color var(--t-fast), padding-left var(--t-med);
}
.menu-link:hover {
  color: var(--color-text);
  padding-left: 6px;
}
.menu-link:focus-visible {
  outline: 2px solid var(--color-text);
  outline-offset: 2px;
}

.menu-footer {
  margin-top: auto;
  padding-top: var(--space-lg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-text-faint);
}


/* ===========================================================
   5. BOUTONS

   - .btn / .btn-primary : bouton primaire (fond plein)
   - .btn-ghost          : bouton secondaire (bordure, fond transparent)
   - .btn-small          : variante compacte mono
   =========================================================== */

.btn,
.btn-primary {
  font-family: var(--font-display);
  font-size: var(--text-md);
  font-weight: 500;
  padding: var(--space-sm) var(--space-lg);
  border: 1px solid var(--color-text);
  border-radius: var(--radius-sm);
  background: var(--color-text);
  color: var(--color-bg);
  transition: background-color var(--t-fast), color var(--t-fast), border-color var(--t-fast);
  cursor: pointer;
}
.btn:hover,
.btn-primary:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-ghost {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-sm) var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  transition: border-color var(--t-fast), color var(--t-fast), background-color var(--t-fast);
  cursor: pointer;
}
.btn-ghost:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}
.btn-ghost:hover:not(:disabled) {
  border-color: var(--color-border-strong);
  color: var(--color-text);
}

/* Variante .btn-ghost en taille primaire (à utiliser conjointement). */
.btn.btn-ghost {
  font-family: var(--font-display);
  font-size: var(--text-md);
  padding: var(--space-sm) var(--space-lg);
  text-transform: none;
  letter-spacing: normal;
}

.btn-small {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--t-fast), color var(--t-fast);
}
.btn-small:hover {
  border-color: var(--color-border-strong);
}


/* ===========================================================
   6. MODALES GÉNÉRIQUES
   =========================================================== */

.modal-backdrop {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  background: var(--bg-modal-backdrop);
  backdrop-filter: blur(4px);
  z-index: 100;
}

.modal {
  width: min(100%, 520px);
  max-height: min(90vh, 720px);
  overflow-y: auto;
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: 0 20px 60px color-mix(in srgb, var(--color-text) 18%, transparent);
}

.modal-title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: var(--space-md);
}

.modal-text {
  color: var(--color-text-soft);
  margin-bottom: var(--space-md);
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-lg);
}


/* ===========================================================
   7. ANIMATIONS
   =========================================================== */

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


/* ===========================================================
   8. SEGMENTED CONTROL

   Boutons radio stylés en barre segmentée. Utilise de vrais
   <input type="radio"> masqués accessiblement pour la navigation
   clavier native.

   Markup :
     <div class="segmented-control" role="group" aria-label="…">
       <input type="radio" name="<group>" id="<id-1>" checked>
       <label for="<id-1>">Option 1</label>
       <input type="radio" name="<group>" id="<id-2>">
       <label for="<id-2>">Option 2</label>
     </div>

   Contraintes :
   - `name` unique par groupe.
   - L'ordre input → label est requis (sélecteur `:checked + label`).
   - Par défaut prend la largeur du contenu ; .segmented-control.is-block
     pour 100% de la largeur disponible.
   =========================================================== */

.segmented-control {
  display: inline-flex;
  align-items: stretch;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
}

/* Radio natif masqué accessiblement (focus clavier préservé). */
.segmented-control input[type="radio"] {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.segmented-control label {
  padding: var(--space-xs) var(--space-sm);
  font-family: var(--font-body, var(--font-display));
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-soft);
  background: transparent;
  border-radius: 4px;
  cursor: pointer;
  user-select: none;
  flex: 1 1 0;
  text-align: center;
  white-space: nowrap;
  transition:
    background var(--t-fast, 120ms) ease,
    color      var(--t-fast, 120ms) ease;
}

.segmented-control label:hover {
  color: var(--color-text);
  background: var(--color-bg);
}

.segmented-control input[type="radio"]:checked + label {
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.04),
    inset 0 0 0 1px var(--color-border);
  font-weight: 600;
}

.segmented-control input[type="radio"]:focus-visible + label {
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.segmented-control.is-block {
  display: flex;
  width: 100%;
}


/* ===========================================================
   9. UTILITAIRES ACCESSIBILITÉ
   =========================================================== */

/* Contenu visible uniquement par les lecteurs d'écran */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}


/* ===========================================================
   10. RESPONSIVE GÉNÉRAL
   =========================================================== */

@media (max-width: 700px) {
  .app {
    padding-top: max(var(--space-sm), env(safe-area-inset-top));
    padding-right: max(var(--space-sm), env(safe-area-inset-right));
    padding-bottom: max(var(--space-sm), env(safe-area-inset-bottom));
    padding-left: max(var(--space-sm), env(safe-area-inset-left));
  }

  .header {
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .header-left {
    flex-direction: column;
    gap: var(--space-xs);
  }

  .header-right {
    gap: var(--space-sm);
  }
}