:root{
  --pt-green:#1B7A5A;
  --pt-teal:#0E4F63;
  --pt-yellow:#FFD23F;
  --pt-orange:#FF7A3D;
  --pt-cream:#F5F1E8;
  --pt-ink:#17262b;
  --pt-muted:#5c6b6f;
  --pt-card:#ffffff;
  --pt-border:#e3ded1;
  --pt-radius:16px;
  --pt-shadow:0 6px 20px rgba(14,79,99,0.12);
  --footer-h:44px;
}

*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0;
  font-family:"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:linear-gradient(180deg,var(--pt-cream),#eef2ee 60%);
  color:var(--pt-ink);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  padding-bottom:calc(var(--footer-h) + 10px);
}

a{color:inherit;}

/* ---------- Header ---------- */
.pt-header{
  display:flex;
  align-items:center;
  gap:14px;
  padding:16px 20px;
  background:linear-gradient(120deg,var(--pt-green),var(--pt-teal));
  color:#fff;
  box-shadow:var(--pt-shadow);
}
.pt-header img{width:44px;height:44px;border-radius:12px;flex-shrink:0;}
.pt-header .pt-titles{display:flex;flex-direction:column;}
.pt-header h1{margin:0;font-size:1.25rem;letter-spacing:.3px;}
.pt-header p{margin:2px 0 0;font-size:.8rem;opacity:.85;}
.pt-sync-badge{
  margin-left:auto;
  font-size:.72rem;
  padding:5px 10px;
  border-radius:999px;
  background:rgba(255,255,255,.15);
  white-space:nowrap;
}
.pt-sync-badge.ok{background:rgba(46,204,113,.28);}
.pt-sync-badge.err{background:rgba(231,76,60,.32);}

/* ---------- Main layout ---------- */
main{flex:1;max-width:920px;width:100%;margin:0 auto;padding:18px 16px 24px;}

.pt-progress-bar{
  background:var(--pt-border);
  border-radius:999px;
  height:10px;
  overflow:hidden;
  margin:6px 0 18px;
}
.pt-progress-bar > span{
  display:block;height:100%;
  background:linear-gradient(90deg,var(--pt-orange),var(--pt-yellow));
  transition:width .35s ease;
}
.pt-progress-label{font-size:.78rem;color:var(--pt-muted);margin-bottom:4px;display:flex;justify-content:space-between;}

/* ---------- Module selector ---------- */
.pt-modules{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:20px;}
@media (max-width:520px){.pt-modules{grid-template-columns:1fr;}}
.pt-module-card{
  background:var(--pt-card);
  border:2px solid var(--pt-border);
  border-radius:var(--pt-radius);
  padding:16px;
  text-align:left;
  cursor:pointer;
  transition:transform .15s ease,border-color .15s ease,box-shadow .15s ease;
  box-shadow:var(--pt-shadow);
}
.pt-module-card:hover{transform:translateY(-2px);}
.pt-module-card.active{border-color:var(--pt-green);}
.pt-module-card .flag{font-size:1.8rem;}
.pt-module-card h2{margin:6px 0 2px;font-size:1.05rem;}
.pt-module-card p{margin:0;font-size:.82rem;color:var(--pt-muted);}
.pt-module-card .mini-progress{margin-top:10px;height:6px;border-radius:999px;background:var(--pt-border);overflow:hidden;}
.pt-module-card .mini-progress span{display:block;height:100%;background:var(--pt-green);}

/* ---------- Categories ---------- */
.pt-categories{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.pt-cat-chip{
  border:1px solid var(--pt-border);
  background:var(--pt-card);
  border-radius:999px;
  padding:7px 14px;
  font-size:.82rem;
  cursor:pointer;
}
.pt-cat-chip.active{background:var(--pt-green);color:#fff;border-color:var(--pt-green);}

/* ---------- Flashcards ---------- */
.pt-card-stage{display:flex;flex-direction:column;align-items:center;gap:14px;}
.pt-flashcard{
  width:100%;max-width:520px;min-height:220px;
  background:var(--pt-card);
  border-radius:20px;
  box-shadow:var(--pt-shadow);
  padding:26px 24px;
  display:flex;flex-direction:column;justify-content:center;
  cursor:pointer;
  position:relative;
  border:2px solid var(--pt-border);
}
.pt-flashcard .term{font-size:1.5rem;font-weight:700;color:var(--pt-teal);}
.pt-flashcard .phon{font-size:.9rem;color:var(--pt-muted);margin-top:2px;}
.pt-flashcard .fr{font-size:1.1rem;margin-top:14px;display:none;color:var(--pt-green);font-weight:600;}
.pt-flashcard .example{margin-top:16px;font-style:italic;color:var(--pt-ink);display:none;}
.pt-flashcard .example-fr{font-size:.85rem;color:var(--pt-muted);display:none;margin-top:4px;}
.pt-flashcard.revealed .fr,
.pt-flashcard.revealed .example,
.pt-flashcard.revealed .example-fr{display:block;}
.pt-flashcard .hint{position:absolute;top:14px;right:16px;font-size:.75rem;color:var(--pt-muted);}
.pt-flashcard .badge-known{
  position:absolute;top:14px;left:16px;font-size:.75rem;
  background:var(--pt-green);color:#fff;padding:3px 9px;border-radius:999px;display:none;
}
.pt-flashcard.known .badge-known{display:inline-block;}

.pt-card-controls{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;}
.pt-btn{
  border:none;border-radius:12px;padding:10px 18px;font-size:.9rem;
  cursor:pointer;font-weight:600;
}
.pt-btn.primary{background:var(--pt-green);color:#fff;}
.pt-btn.secondary{background:#fff;border:1px solid var(--pt-border);color:var(--pt-ink);}
.pt-btn.ghost{background:transparent;color:var(--pt-muted);text-decoration:underline;}
.pt-btn.warn{background:var(--pt-orange);color:#fff;}
.pt-btn:disabled{opacity:.45;cursor:not-allowed;}

.pt-nav-row{display:flex;justify-content:space-between;width:100%;max-width:520px;font-size:.85rem;color:var(--pt-muted);}

/* ---------- Quiz ---------- */
.pt-quiz-q{font-size:1.05rem;font-weight:600;margin-bottom:14px;}
.pt-quiz-options{display:grid;gap:10px;}
.pt-quiz-option{
  text-align:left;padding:12px 14px;border-radius:12px;
  border:1px solid var(--pt-border);background:#fff;cursor:pointer;font-size:.92rem;
}
.pt-quiz-option.correct{background:#e5f6ec;border-color:var(--pt-green);}
.pt-quiz-option.wrong{background:#fbe9e7;border-color:#e05b4b;}

/* ---------- Empty / sections ---------- */
.pt-section-title{font-size:1rem;font-weight:700;margin:22px 0 10px;color:var(--pt-teal);}
.pt-note{font-size:.82rem;color:var(--pt-muted);}

/* ---------- Footer (fixe, centré) ---------- */
.pt-footer{
  position:fixed;left:0;right:0;bottom:0;
  height:var(--footer-h);
  display:flex;align-items:center;justify-content:center;
  background:rgba(14,79,99,0.95);
  color:#fff;
  font-size:.75rem;
  text-align:center;
  padding:0 10px;
  backdrop-filter:blur(4px);
  z-index:50;
}

/* ---------- Toast ---------- */
.pt-toast{
  position:fixed;bottom:calc(var(--footer-h) + 14px);left:50%;
  transform:translateX(-50%);
  background:var(--pt-ink);color:#fff;
  padding:9px 16px;border-radius:10px;font-size:.82rem;
  opacity:0;pointer-events:none;transition:opacity .25s ease, bottom .25s ease;
  z-index:60;
}
.pt-toast.show{opacity:1;bottom:calc(var(--footer-h) + 22px);}