/* =====================================================================
   Carnet de Mots — Design tokens
   Thème "carnet d'école" : écrans clairs couleur craie pour la
   sélection, tableau noir pour l'entraînement — la flashcard devient
   une fiche épinglée au tableau, bordure pointillée façon craie.
   ===================================================================== */

:root {
  /* Couleurs */
  --paper:        #EDF3F2;   /* fond clair "poussière de craie" */
  --paper-card:   #FFFFFF;
  --slate:        #1B2A33;   /* tableau noir */
  --slate-light:  #25394A;
  --ink:          #233044;   /* texte principal sur fond clair */
  --ink-soft:     #5C6B7A;
  --chalk:        #F3F6F5;   /* texte clair sur fond sombre */
  --yellow:       #FFD166;   /* accent craie jaune */
  --coral:        #FF6B5E;   /* accent craie corail */
  --mint:         #6FCF97;   /* accent craie vert */
  --denim:        #6C8CF5;   /* accent craie bleu (4e langue éventuelle) */
  --line-soft:    rgba(35,48,68,0.12);
  --radius-sm:    10px;
  --radius-md:    16px;
  --radius-lg:    22px;
  --shadow-card:  0 6px 18px rgba(27,42,51,0.10);
  --shadow-pop:   0 14px 34px rgba(27,42,51,0.28);

  /* Typographie */
  --font-display: "Fredoka", "Inter", sans-serif;
  --font-body:    "Inter", system-ui, sans-serif;
  --font-data:    "Space Mono", "Courier New", monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-tap-highlight-color: transparent;
}

body { min-height: 100vh; }

.no-js { padding: 2rem; text-align: center; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--denim);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* ---------------------------------------------------------------------
   Mise en page générale
   --------------------------------------------------------------------- */

.app { min-height: 100vh; display: flex; flex-direction: column; }
.app.training-mode { background: var(--slate); }

/* ---------------------------------------------------------------------
   En-tête + fil d'Ariane + indicateur d'étapes
   --------------------------------------------------------------------- */

.app-header {
  background: var(--slate);
  color: var(--chalk);
  padding: 1.1rem 1.25rem 1rem;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.app-header__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

.app-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.3rem;
  margin: 0;
  letter-spacing: 0.01em;
}

.app-title__accent {
  display: inline-block;
  border-bottom: 4px solid var(--yellow);
  padding-bottom: 1px;
}

.reset-btn {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--chalk);
  font-size: 0.85rem;
  font-weight: 600;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.08);
  white-space: nowrap;
}
.reset-btn:hover { background: rgba(255,255,255,0.16); }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.85rem;
  list-style: none;
  padding: 0;
}

.breadcrumb li { display: flex; align-items: center; gap: 0.4rem; }

.breadcrumb button {
  color: var(--chalk);
  font-size: 0.82rem;
  font-weight: 600;
  background: rgba(255,255,255,0.08);
  padding: 0.3rem 0.65rem;
  border-radius: 999px;
}
.breadcrumb button:hover { background: rgba(255,255,255,0.18); }
.breadcrumb .sep { color: var(--ink-soft); opacity: 0.6; }

.stepper { display: flex; gap: 0.4rem; margin-top: 0.9rem; }
.stepper span { height: 5px; flex: 1; border-radius: 999px; background: rgba(255,255,255,0.14); }
.stepper span.done { background: var(--mint); }
.stepper span.current { background: var(--yellow); }

/* ---------------------------------------------------------------------
   Écrans de sélection (niveau / langue / groupe)
   --------------------------------------------------------------------- */

.screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 1.5rem 1.25rem 2.5rem;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
}

.screen-title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  margin: 0 0 0.3rem;
}

.screen-subtitle { color: var(--ink-soft); margin: 0 0 1.5rem; font-size: 0.95rem; }

.chip-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 0.85rem;
}

.chip {
  background: var(--paper-card);
  border-radius: var(--radius-md);
  border-left: 6px solid var(--ink-soft);
  box-shadow: var(--shadow-card);
  padding: 1rem 1.1rem;
  text-align: left;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-height: 78px;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.chip:hover { transform: translateY(-2px); box-shadow: var(--shadow-pop); }
.chip:active { transform: translateY(0); }

.chip__label { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; color: var(--ink); }
.chip__meta { font-size: 0.78rem; color: var(--ink-soft); font-family: var(--font-data); }

.state-message { color: var(--ink-soft); font-size: 0.95rem; padding: 1.5rem 0; }
.state-message.error { color: var(--coral); font-weight: 600; }

.empty-state {
  border: 2px dashed var(--line-soft);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  color: var(--ink-soft);
  text-align: center;
}
.empty-state code { background: rgba(35,48,68,0.06); padding: 0.1rem 0.4rem; border-radius: 6px; font-family: var(--font-data); }

/* ---------------------------------------------------------------------
   Écran "sens de l'entraînement"
   --------------------------------------------------------------------- */

.direction-grid { display: flex; flex-direction: column; gap: 1rem; }

.direction-card {
  background: var(--paper-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  text-align: left;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
  width: 100%;
}
.direction-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-pop); }

.direction-card__text { font-family: var(--font-display); font-weight: 600; font-size: 1.08rem; }
.direction-card__from { color: var(--ink-soft); font-weight: 500; }
.direction-card__arrow { margin: 0 0.4rem; }

.direction-card__badge {
  flex-shrink: 0;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

/* ---------------------------------------------------------------------
   Entraînement — flashcards
   --------------------------------------------------------------------- */

.training-screen {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 1.5rem 1.1rem 2rem;
  color: var(--chalk);
  width: 100%;
  max-width: 560px;
  margin: 0 auto;
}

.training-progress {
  font-family: var(--font-data);
  font-size: 0.85rem;
  color: var(--chalk);
  opacity: 0.75;
  margin-bottom: 1.1rem;
  letter-spacing: 0.03em;
}

.flashcard-scene {
  width: 100%;
  max-width: 420px;
  aspect-ratio: 4 / 3;
  perspective: 1400px;
  margin-bottom: 1.4rem;
}

.flashcard {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.45s cubic-bezier(.2,.8,.2,1);
  cursor: pointer;
}
.flashcard.is-flipped { transform: rotateY(180deg); }

.flashcard__face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  border-radius: var(--radius-lg);
  background: var(--paper);
  border: 3px dashed rgba(35,48,68,0.22);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 1.5rem;
  gap: 0.6rem;
}

.flashcard__face--back {
  transform: rotateY(180deg);
  background: var(--slate-light);
  border-color: rgba(255,255,255,0.22);
}

.flashcard__eyebrow {
  font-family: var(--font-data);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.flashcard__face--back .flashcard__eyebrow { color: rgba(255,255,255,0.55); }

.flashcard__word {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(1.4rem, 6vw, 2.1rem);
  color: var(--ink);
  word-break: break-word;
}
.flashcard__face--back .flashcard__word { color: var(--mint); }

.flashcard__note { font-size: 0.85rem; color: var(--ink-soft); font-style: italic; }
.flashcard__face--back .flashcard__note { color: rgba(255,255,255,0.65); }

.flashcard__hint { margin-top: 0.4rem; font-size: 0.78rem; color: var(--ink-soft); opacity: 0.7; }
.flashcard__face--back .flashcard__hint { color: rgba(255,255,255,0.55); }

.training-controls { display: flex; align-items: center; justify-content: center; gap: 0.7rem; width: 100%; }

.ctrl-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.8rem 0.5rem;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.08);
  color: var(--chalk);
  font-size: 0.78rem;
  font-weight: 600;
  min-height: 56px;
}
.ctrl-btn:hover { background: rgba(255,255,255,0.15); }
.ctrl-btn:disabled { opacity: 0.35; cursor: not-allowed; }
.ctrl-btn__icon { font-size: 1.25rem; }

.ctrl-btn--shuffle { background: rgba(255,209,102,0.16); color: var(--yellow); }
.ctrl-btn--shuffle:hover { background: rgba(255,209,102,0.26); }

.training-footer { margin-top: 1.6rem; display: flex; flex-wrap: wrap; gap: 0.6rem; justify-content: center; }

.link-btn {
  color: rgba(255,255,255,0.7);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 3px;
  padding: 0.3rem;
}
.link-btn:hover { color: var(--chalk); }

/* ---------------------------------------------------------------------
   Fin de groupe
   --------------------------------------------------------------------- */

.finish-card {
  text-align: center;
  color: var(--chalk);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.2rem;
  padding: 2rem 1rem;
}

.finish-card__emoji { font-size: 2.6rem; }
.finish-card__title { font-family: var(--font-display); font-weight: 600; font-size: 1.3rem; margin: 0; }

.finish-card__actions { display: flex; flex-direction: column; gap: 0.7rem; width: 100%; max-width: 320px; }

.primary-btn {
  background: var(--yellow);
  color: var(--slate);
  font-family: var(--font-display);
  font-weight: 600;
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: 0.98rem;
}
.primary-btn:hover { filter: brightness(1.05); }

.secondary-btn {
  background: rgba(255,255,255,0.1);
  color: var(--chalk);
  font-weight: 600;
  padding: 0.8rem 1.2rem;
  border-radius: var(--radius-md);
  font-size: 0.92rem;
}
.secondary-btn:hover { background: rgba(255,255,255,0.18); }

/* ---------------------------------------------------------------------
   Responsive : écrans plus larges (tablette / desktop)
   --------------------------------------------------------------------- */

@media (min-width: 640px) {
  .app-header { padding: 1.4rem 2rem 1.2rem; }
  .screen { padding: 2.2rem 2rem 3rem; }
  .training-screen { padding: 2.2rem 1.5rem 2.5rem; }
  .app-title { font-size: 1.5rem; }
}

@media (min-width: 900px) {
  .screen, .training-screen { max-width: 800px; }
  .direction-grid { flex-direction: row; }
}