/* Alpage · coque responsive. Mêmes 4 destinations partout : Accueil, Parcours, Récompenses, Profil. */
.app { min-height: 100dvh; display: grid; grid-template-columns: minmax(0, 1fr); grid-template-rows: 1fr auto; }
.app__nav { position: sticky; bottom: 0; display: flex; gap: 4px; padding: 8px 12px calc(8px + env(safe-area-inset-bottom)); background: var(--surface); border-top: 2px solid var(--surface-2); }
.app__nav a, .app__nav button { flex: 1; min-height: 56px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 2px; border-radius: 14px; color: var(--ink-2); font: 600 12px var(--font-text); text-decoration: none; }
.app__nav a[aria-current="page"], .app__nav button[aria-current="page"] { background: var(--action-tint); color: var(--ink); }
.app__nav i { font-size: 24px; }
.app__main { padding: 24px 16px 32px; display: flex; flex-direction: column; gap: 14px; max-width: 640px; width: 100%; margin: 0 auto; box-sizing: border-box; }
.app__aside { display: none; }
.subjects-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }

/* Tablette : rail d'icônes */
@media (min-width: 640px) {
  .app { grid-template-columns: 88px minmax(0, 1fr); grid-template-rows: 1fr; }
  .app__nav { position: sticky; top: 0; height: 100dvh; flex-direction: column; justify-content: flex-start; padding: 24px 8px; border-top: 0; border-right: 2px solid var(--surface-2); grid-row: 1; grid-column: 1; }
  .app__nav a, .app__nav button { flex: none; }
  .app__main { grid-column: 2; padding: 32px; }
}

/* Bureau : barre latérale 248 · contenu · colonne de suivi 336 */
@media (min-width: 1024px) {
  .app { grid-template-columns: 248px minmax(0, 1fr) 336px; }
  .app__nav { padding: 28px 16px; gap: 6px; }
  .app__nav a, .app__nav button { flex-direction: row; justify-content: flex-start; gap: 14px; height: 52px; min-height: 52px; padding: 0 16px; font-size: 16px; }
  .app__nav a[aria-current="page"], .app__nav button[aria-current="page"] { border: 2px solid var(--action); }
  .app__main { max-width: none; padding: 36px 40px; }
  .app__aside { display: flex; flex-direction: column; gap: 16px; padding: 36px 28px 36px 0; }
  .subjects-grid { gap: 16px; }
}

/* Écran de jeu : toujours centré, 600 max, sans nav.
   Classes .play* (et non .game*) : .game est déjà la carte de jeu du hub (hub.css). */
.play { max-width: 600px; margin: 0 auto; min-height: 100dvh; display: flex; flex-direction: column; }
.play__body { flex: 1; padding: 24px 16px; display: flex; flex-direction: column; gap: 14px; }
.play__scene { height: 170px; border-radius: 22px; overflow: hidden; }
@media (min-width: 640px) { .play__scene { height: 240px; } }