/* core.css — Styles flashcards génériques */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --color-bg: #F7F5F0;
  --color-surface: #FFFFFF;
  --color-text: #1A1A1A;
  --color-text-muted: #6B6B6B;
  --color-text-light: #999999;
  --color-accent: #2D5BE3;
  --color-accent-soft: #E8EEFB;
  --color-success: #5B8C5A;
  --color-success-soft: #5B8C5A12;
  --color-warning: #C08B30;
  --color-danger: #C15F3C;
  --color-border: #E5E2DC;
  --color-card-back: #F0F4FF;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-card: 20px;
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-card: 0 2px 12px rgba(45,43,40,0.08);
  --font-body: 'Inter', system-ui, sans-serif;
  --font-display: 'Inter', system-ui, sans-serif;
  --t: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body { font-family: var(--font-body); background: var(--color-bg); color: var(--color-text); line-height: 1.6; min-height: 100dvh; }

/* ─── App container ──────────────────────────────────── */
.app-container { max-width: 800px; margin: 0 auto; padding: 1rem; }
@media (min-width: 640px) { .app-container { padding: 2rem; } }

.app-header { display: flex; align-items: center; justify-content: space-between; padding: 1rem 0; margin-bottom: 1.5rem; border-bottom: 1px solid var(--color-border); }
.app-header__title { font-family: var(--font-display); font-size: 1.6rem; font-weight: 700; letter-spacing: -0.02em; }
.app-header__back { display: inline-flex; align-items: center; gap: 0.4rem; font-family: var(--font-body); font-size: 0.9rem; font-weight: 500; color: var(--color-text-muted); text-decoration: none; padding: 0.4rem 0.8rem; border-radius: var(--radius-sm); transition: all var(--t); }
.app-header__back:hover { color: var(--color-accent); background: var(--color-accent-soft); }

/* ─── Catalog ────────────────────────────────────────── */
.catalog-category { margin-bottom: 2rem; }
.catalog-category__title { font-family: var(--font-display); font-size: 1.1rem; font-weight: 700; color: var(--color-text-muted); margin-bottom: 0.75rem; padding-left: 0.25rem; }
.catalog-list { display: flex; flex-direction: column; gap: 0.6rem; }

.catalog-card { display: flex; align-items: center; gap: 1rem; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 1rem 1.2rem; text-decoration: none; color: inherit; cursor: pointer; transition: all var(--t); animation: fadeUp 0.35s ease both; }
.catalog-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-md); transform: translateY(-1px); }
.catalog-card:nth-child(1){animation-delay:.03s}
.catalog-card:nth-child(2){animation-delay:.06s}
.catalog-card:nth-child(3){animation-delay:.09s}
.catalog-card:nth-child(4){animation-delay:.12s}

.catalog-card__order { font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--color-text-light); min-width: 2.5rem; text-align: center; }
.catalog-card__body { flex: 1; min-width: 0; }
.catalog-card__title { font-weight: 700; font-size: 1rem; margin-bottom: 0.15rem; }
.catalog-card__meta { display: flex; align-items: center; gap: 0.75rem; font-size: 0.8rem; color: var(--color-text-muted); }
.catalog-card__stars { color: var(--color-warning); letter-spacing: 1px; }
.catalog-card__badge { display: inline-block; font-size: 0.7rem; font-weight: 700; padding: 0.15rem 0.5rem; border-radius: 999px; text-transform: uppercase; background: var(--color-accent-soft); color: var(--color-accent); }
.catalog-card__badge--resource { background: #FFF3E0; color: #E65100; }

.catalog-card__progress { display: flex; align-items: center; gap: 0.5rem; }
.catalog-card__progress-bar { width: 60px; height: 4px; background: var(--color-border); border-radius: 999px; overflow: hidden; }
.catalog-card__progress-fill { height: 100%; background: var(--color-success); border-radius: 999px; transition: width 0.6s ease; }
.catalog-card__progress-text { font-size: 0.75rem; font-weight: 700; color: var(--color-success); min-width: 2.5rem; }

/* ─── Chapter — Progress ─────────────────────────────── */
.progress-section { margin-bottom: 1rem; }
.progress-header { display: flex; justify-content: space-between; margin-bottom: 0.35rem; font-size: 0.8rem; }
.progress-header__label { font-weight: 600; color: var(--color-text-muted); }
.progress-header__value { font-weight: 700; color: var(--color-success); }
.progress-bar { width: 100%; height: 6px; background: var(--color-border); border-radius: 999px; overflow: hidden; }
.progress-bar__fill { height: 100%; background: var(--color-success); border-radius: 999px; transition: width 0.6s ease; }

/* ─── Deck selector ──────────────────────────────────── */
.deck-selector { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1rem; }
.deck-btn { display: inline-flex; align-items: center; gap: 0.35rem; padding: 0.45rem 0.85rem; font-family: var(--font-body); font-size: 0.82rem; font-weight: 600; border: 1.5px solid var(--color-border); border-radius: 999px; background: var(--color-surface); color: var(--color-text); cursor: pointer; transition: all var(--t); }
.deck-btn:hover { border-color: var(--color-accent); }
.deck-btn--active { border-color: var(--color-accent); background: var(--color-accent); color: #fff; }
.deck-btn__count { font-size: 0.72rem; font-weight: 400; opacity: 0.65; }

/* ─── Empty state ────────────────────────────────────── */
.empty-state { text-align: center; padding: 3rem 1rem; color: var(--color-text-muted); }
.empty-state__icon { font-size: 2.5rem; margin-bottom: 0.5rem; }
.empty-state__title { font-family: var(--font-display); font-size: 1.15rem; font-weight: 700; margin-bottom: 0.5rem; }

/* ─── External link ──────────────────────────────────── */
.external-link { display: inline-flex; align-items: center; gap: 0.3rem; font-size: 0.8rem; color: var(--color-accent); text-decoration: none; font-weight: 600; }
.external-link:hover { text-decoration: underline; }

/* ─── Card info (interval, reps) ─────────────────────── */
.card-info { text-align: center; margin-bottom: 0.5rem; display: flex; gap: 0.75rem; justify-content: center; flex-wrap: wrap; font-size: 0.72rem; font-weight: 600; color: var(--color-text-light); }
.card-info__deferred { color: var(--color-success); }
.card-info__reps { color: var(--color-text-muted); }
.card-info__interval { color: var(--color-text-light); }

/* ─── Flashcard ──────────────────────────────────────── */
.flashcard-stage { perspective: 1200px; min-height: 240px; margin-bottom: 1rem; }
.flashcard { position: relative; width: 100%; min-height: 240px; cursor: pointer; transform-style: preserve-3d; transition: transform 0.4s cubic-bezier(0.4,0,0.2,1); }
.flashcard--flipped { transform: rotateY(180deg); }
.flashcard__face { position: absolute; inset: 0; backface-visibility: hidden; -webkit-backface-visibility: hidden; border-radius: var(--radius-card); padding: 2rem 1.5rem; display: flex; flex-direction: column; justify-content: center; align-items: center; text-align: center; box-shadow: var(--shadow-card); overflow-y: auto; }
.flashcard__face--front { background: #fff; border: 1.5px solid var(--color-border); }
.flashcard__face--back { background: var(--color-card-back); border: 1.5px solid var(--color-accent); transform: rotateY(180deg); }
.flashcard__label { font-size: 0.65rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.15em; color: var(--color-text-light); margin-bottom: 0.75rem; }
.flashcard__text { font-size: 1.3rem; line-height: 1.7; max-width: 100%; word-wrap: break-word; }
.flashcard__face--front .flashcard__text { font-weight: 500; }
.flashcard__face--back .flashcard__text { color: var(--color-accent); font-weight: 600; }
.flashcard__hint { position: absolute; bottom: 0.75rem; font-size: 0.72rem; color: var(--color-text-light); }

/* ─── Card controls ──────────────────────────────────── */
.card-controls { display: flex; align-items: center; justify-content: center; gap: 1rem; margin-bottom: 1rem; }
.card-controls__counter { font-family: var(--font-display); font-size: 1rem; font-weight: 600; color: var(--color-text-muted); min-width: 5rem; text-align: center; font-variant-numeric: tabular-nums; }

/* ─── Rating (2 boutons) ─────────────────────────────── */
.rating-section { text-align: center; margin-bottom: 1rem; }
.rating-buttons { display: flex; justify-content: center; gap: 0.75rem; }
.rating-btn { flex: 1; max-width: 200px; padding: 0.75rem 1rem; font-family: var(--font-body); font-size: 0.9rem; font-weight: 700; border: 1.5px solid; border-radius: 14px; cursor: pointer; transition: all var(--t); }
.rating-btn--wrong { border-color: #C15F3C33; color: #C15F3C; background: #C15F3C0A; }
.rating-btn--wrong:hover { background: #C15F3C; color: #fff; }
.rating-btn--correct { border-color: #5B8C5A33; color: #5B8C5A; background: #5B8C5A0A; }
.rating-btn--correct:hover { background: #5B8C5A; color: #fff; }

/* ─── Animations ─────────────────────────────────────── */
@keyframes fadeUp { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
.animate-in { animation: fadeUp 0.4s ease both; }

/* ─── Mobile ≤ 480px ─────────────────────────────────── */
@media (max-width: 480px) {
  .app-container { padding: 0.6rem; }
  .app-header { padding: 0.6rem 0; margin-bottom: 0.75rem; }
  .app-header__title { font-size: 1.3rem; }

  .progress-section { margin-bottom: 0.5rem; }
  .progress-header { font-size: 0.75rem; }

  .deck-selector { gap: 0.35rem; margin-bottom: 0.6rem; }
  .deck-btn { padding: 0.35rem 0.65rem; font-size: 0.75rem; }
  .deck-btn__count { font-size: 0.65rem; }

  .flashcard-stage { min-height: 200px; margin-bottom: 0.75rem; }
  .flashcard { min-height: 200px; }
  .flashcard__face { padding: 1.2rem 1rem; }
  .flashcard__text { font-size: 1.08rem; line-height: 1.55; }
  .flashcard__label { margin-bottom: 0.5rem; font-size: 0.6rem; }
  .flashcard__hint { bottom: 0.5rem; font-size: 0.68rem; }

  .card-controls { gap: 0.75rem; margin-bottom: 0.75rem; }
  .card-controls__counter { font-size: 0.9rem; }

  .card-info { font-size: 0.65rem; gap: 0.5rem; margin-bottom: 0.4rem; }

  .rating-section { margin-bottom: 0.5rem; }
  .rating-buttons { gap: 0.5rem; }
  .rating-btn { max-width: 170px; padding: 0.6rem 0.6rem; font-size: 0.82rem; }
}

/* ─── Très petit écran ≤ 380px ───────────────────────── */
@media (max-width: 380px) {
  .deck-selector { gap: 0.25rem; }
  .deck-btn { padding: 0.3rem 0.5rem; font-size: 0.7rem; }
  .flashcard-stage { min-height: 180px; }
  .flashcard { min-height: 180px; }
  .flashcard__text { font-size: 1rem; }
  .rating-btn { padding: 0.5rem 0.4rem; font-size: 0.78rem; }
}