.fab-public-activity{border:1px solid #ddd;border-radius:14px;padding:20px;margin:18px 0;background:#fff;max-width:850px}.fab-public-question{border-top:1px solid #eee;padding:16px 0}.fab-public-question:first-of-type{border-top:0}.fab-q-img{max-width:320px;border-radius:10px;display:block;margin:10px 0}.fab-option{display:flex;align-items:center;gap:10px;border:1px solid #ddd;border-radius:10px;padding:10px;margin:8px 0;cursor:pointer}.fab-option:hover{background:#f7f9fb}.fab-option img{max-width:90px;max-height:70px;border-radius:8px}.fab-submit{background:#1d4ed8;color:#fff;border:0;border-radius:10px;padding:10px 18px;cursor:pointer}.fab-feedback{font-weight:600;margin-top:8px}.fab-feedback.ok{color:#16803c}.fab-feedback.no{color:#b32d2e}.fab-score{font-size:18px;font-weight:700;margin-top:14px}

/* v0.5.1: True/False spacing */
.fab-tf-options{display:flex;gap:18px;align-items:center;flex-wrap:wrap;margin:10px 0 4px}.fab-tf-option{display:inline-flex;align-items:center;gap:7px;padding:8px 12px;border:1px solid #ddd;border-radius:10px;background:#fff;cursor:pointer}.fab-tf-option:hover{background:#f7f9fb}.fab-tf-option input{margin:0}

/* v0.5.2 Grammar Engine */
.fab-grammar-question{font-size:17px;line-height:2}.fab-grammar-line input,.fab-grammar-line select{display:inline-block;min-width:110px;margin:0 5px;padding:6px 8px;border:1px solid #c3c4c7;border-radius:8px}.fab-grammar-line input.fab-blank-ok,.fab-grammar-line select.fab-blank-ok{border-color:#16803c;background:#f0fff4}.fab-grammar-line input.fab-blank-no,.fab-grammar-line select.fab-blank-no{border-color:#b32d2e;background:#fff5f5}

/* v0.6 Matching Engine */
.fab-match-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:12px 0}.fab-match-left,.fab-match-right{display:flex;flex-direction:column;gap:10px}.fab-match-item{border:1px solid #ddd;background:#fff;border-radius:12px;padding:10px;display:flex;align-items:center;gap:10px;cursor:pointer;text-align:left}.fab-match-item:hover,.fab-match-item.selected{background:#eef4ff;border-color:#1d4ed8}.fab-match-item.paired{background:#f8fafc}.fab-match-item img{width:70px;height:56px;object-fit:cover;border-radius:8px}.fab-match-ok{border-color:#16803c!important;background:#f0fff4!important}.fab-match-no{border-color:#b32d2e!important;background:#fff5f5!important}.fab-drag-bank{display:flex;flex-wrap:wrap;gap:12px;margin:12px 0}.fab-drag-card{border:1px solid #ddd;background:#fff;border-radius:12px;padding:8px 10px;display:flex;align-items:center;gap:8px;cursor:grab}.fab-drag-card img{width:70px;height:56px;object-fit:cover;border-radius:8px}.fab-drop-targets{display:grid;gap:12px}.fab-drop-zone{border:1px dashed #aaa;border-radius:12px;padding:12px;background:#fafafa}.fab-drop-label{font-weight:700;display:flex;align-items:center;gap:10px;margin-bottom:8px}.fab-drop-label img{width:70px;height:56px;object-fit:cover;border-radius:8px}.fab-drop-slot{min-height:64px;border:1px solid #e5e7eb;border-radius:10px;padding:8px;background:#fff;display:flex;align-items:center;gap:8px;color:#777}@media(max-width:650px){.fab-match-columns{grid-template-columns:1fr}.fab-match-item img,.fab-drag-card img,.fab-drop-label img{width:58px;height:46px}}

/* v0.7 Study Engine / Flashcards */
.fab-flashcard-deck{max-width:760px;margin:20px auto;text-align:center}.fab-flashcard-stage{position:relative;min-height:380px;perspective:1200px}.fab-flashcard{display:none;position:absolute;inset:0}.fab-flashcard.active{display:block}.fab-flashcard-inner{position:relative;width:100%;height:100%;min-height:380px;transition:transform .45s;transform-style:preserve-3d}.fab-flashcard.flipped .fab-flashcard-inner{transform:rotateY(180deg)}.fab-flashcard-face{position:absolute;inset:0;backface-visibility:hidden;border:1px solid #ddd;border-radius:18px;background:#fff;box-shadow:0 8px 26px rgba(0,0,0,.08);display:flex;align-items:center;justify-content:center;padding:24px;overflow:auto}.fab-flashcard-back{transform:rotateY(180deg);background:#fbfcff}.fab-flashcard-content{width:100%;font-size:20px;line-height:1.55}.fab-flashcard-content img{max-width:100%;max-height:210px;object-fit:contain;border-radius:14px}.fab-flashcard-content audio,.fab-flashcard-content video{width:100%;max-width:520px}.fab-media-pdf iframe{width:100%;height:260px;border:1px solid #ddd;border-radius:10px;margin-top:8px}.fab-media-pdf a{display:inline-block;margin-bottom:8px}.fab-flashcard-controls{display:flex;justify-content:center;gap:10px;margin:18px 0 8px}.fab-flashcard-controls button{background:#1d4ed8;color:#fff;border:0;border-radius:10px;padding:10px 16px;cursor:pointer}.fab-card-counter{font-weight:700;color:#555}@media(max-width:650px){.fab-flashcard-stage,.fab-flashcard-inner{min-height:330px}.fab-flashcard-face{padding:16px}.fab-flashcard-content{font-size:17px}.fab-flashcard-controls{flex-wrap:wrap}}

/* v0.8 Learning Views */
.fab-game-hud{display:flex;gap:16px;align-items:center;justify-content:center;margin:10px 0 16px;font-weight:700;color:#374151}.fab-memory-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(120px,1fr));gap:12px}.fab-memory-tile{min-height:110px;border:1px solid #d1d5db;border-radius:14px;background:#eef4ff;cursor:pointer;position:relative;padding:10px;font-size:16px;display:flex;align-items:center;justify-content:center;overflow:hidden}.fab-memory-tile .fab-memory-front{display:none}.fab-memory-tile.open,.fab-memory-tile.matched{background:#fff}.fab-memory-tile.open .fab-memory-back,.fab-memory-tile.matched .fab-memory-back{display:none}.fab-memory-tile.open .fab-memory-front,.fab-memory-tile.matched .fab-memory-front{display:block}.fab-memory-tile img{max-width:100%;max-height:85px;object-fit:contain;border-radius:10px}.fab-memory-message{text-align:center;font-weight:700;margin-top:12px;color:#1d4ed8}.fab-crossword-row{border:1px solid #e5e7eb;border-radius:12px;padding:12px;margin:10px 0;background:#fafafa}.fab-crossword-row label{display:block;margin-bottom:8px}.fab-crossword-row input{padding:8px 10px;border:1px solid #c3c4c7;border-radius:8px;min-width:220px}.fab-crossword-check{background:#1d4ed8;color:#fff;border:0;border-radius:10px;padding:10px 16px;cursor:pointer}.fab-crossword-result,.fab-wordhunt-result{font-weight:700;margin-top:12px}.fab-wordhunt-grid{display:grid;grid-template-columns:repeat(12,32px);gap:4px;justify-content:center;margin:16px auto;overflow:auto}.fab-wordhunt-grid span{width:32px;height:32px;border:1px solid #d1d5db;border-radius:6px;display:flex;align-items:center;justify-content:center;font-weight:700;background:#fff}.fab-wordhunt-list{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.fab-wordhunt-list button{border:1px solid #d1d5db;border-radius:999px;background:#fff;padding:8px 12px;cursor:pointer}.fab-wordhunt-list button.found{background:#f0fff4;border-color:#16803c;text-decoration:line-through}.fab-reading-passage,.fab-listening-audio{border:1px solid #e5e7eb;background:#fbfcff;border-radius:14px;padding:16px;margin:14px 0}.fab-listening-audio audio{width:100%}@media(max-width:650px){.fab-wordhunt-grid{grid-template-columns:repeat(12,24px);gap:3px}.fab-wordhunt-grid span{width:24px;height:24px;font-size:12px}.fab-memory-grid{grid-template-columns:repeat(2,1fr)}}

/* v0.8.1 Classic Crossword / Word Hunt Presentation */
.fab-crossword.classic{max-width:980px;margin:20px auto}.fab-crossword-grid{display:grid;grid-template-columns:repeat(var(--fab-cw-size),34px);gap:2px;justify-content:center;overflow:auto;margin:16px auto}.fab-cw-cell{width:34px;height:34px;border:1px solid #111;background:#fff;position:relative;display:flex;align-items:center;justify-content:center;box-sizing:border-box}.fab-cw-cell.black{background:#111}.fab-cw-cell input{width:100%;height:100%;border:0;text-align:center;text-transform:uppercase;font-size:18px;font-weight:700;background:transparent;padding:0}.fab-cw-num{position:absolute;top:1px;left:3px;font-size:9px;line-height:1;color:#111}.fab-crossword-clues{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:16px 0}.fab-clue{background:#fafafa;border:1px solid #e5e7eb;border-radius:10px;padding:10px;margin:8px 0}.fab-warning{background:#fff8e1;border:1px solid #facc15;border-radius:10px;padding:10px}.fab-wordhunt.classic{max-width:980px;margin:20px auto;text-align:center}.fab-wordhunt.classic .fab-wordhunt-grid{display:grid;grid-template-columns:repeat(var(--fab-wh-size),34px)!important;gap:4px;justify-content:center;margin:16px auto;overflow:auto}.fab-wordhunt.classic .fab-wordhunt-grid button{width:34px;height:34px;border:1px solid #d1d5db;border-radius:6px;background:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;cursor:pointer}.fab-wordhunt.classic .fab-wordhunt-grid button.highlight{background:#dcfce7;border-color:#16a34a}.fab-wordhunt.classic .fab-wordhunt-list button.found{background:#dcfce7;border-color:#16a34a;text-decoration:line-through}@media(max-width:650px){.fab-crossword-grid{grid-template-columns:repeat(var(--fab-cw-size),28px)}.fab-cw-cell{width:28px;height:28px}.fab-cw-cell input{font-size:15px}.fab-crossword-clues{grid-template-columns:1fr}.fab-wordhunt.classic .fab-wordhunt-grid{grid-template-columns:repeat(var(--fab-wh-size),26px)!important;gap:3px}.fab-wordhunt.classic .fab-wordhunt-grid button{width:26px;height:26px;font-size:12px}}

/* v0.8.2 Crossword / Word Hunt fixes */
.fab-crossword.classic .fab-cw-cell.empty{
  background:transparent!important;
  border-color:transparent!important;
  box-shadow:none!important;
  pointer-events:none;
}
.fab-crossword.classic .fab-cw-cell:not(.empty){
  border:1px solid #9ca3af;
  border-radius:4px;
  background:#fff;
  box-shadow:0 1px 2px rgba(15,23,42,.06);
}
.fab-wordhunt.classic .fab-wordhunt-grid button{
  color:#0f172a!important;
  user-select:none;
  transition:background .12s,border-color .12s,transform .08s;
}
.fab-wordhunt.classic .fab-wordhunt-grid button:hover{
  border-color:#60a5fa;
  transform:translateY(-1px);
}
.fab-wordhunt.classic .fab-wordhunt-grid button.selected{
  background:#dbeafe!important;
  border-color:#2563eb!important;
  color:#0f172a!important;
}
.fab-wordhunt.classic .fab-wordhunt-grid button.found{
  background:#dcfce7!important;
  border-color:#16a34a!important;
  color:#064e3b!important;
  font-weight:900;
}
.fab-wordhunt.classic .fab-wordhunt-list button{
  cursor:default;
}
.fab-wordhunt.classic .fab-wordhunt-list button.found{
  background:#dcfce7!important;
  border-color:#16a34a!important;
  color:#064e3b!important;
  text-decoration:line-through;
}
.fab-wordhunt.classic .fab-wordhunt-result{
  text-align:center;
  color:#0f2d5c;
}


/* v0.9 Professional Polish */
.fab-public-activity{--fab-blue:#1d4ed8;--fab-green:#16a34a;--fab-red:#dc2626;--fab-border:#e5e7eb;--fab-soft:#f8fafc;border:1px solid var(--fab-border);border-radius:18px;background:#fff;padding:22px;box-shadow:0 2px 8px rgba(15,23,42,.06);max-width:1080px;margin:18px auto}.fab-public-activity h3{margin-top:0;font-size:24px;letter-spacing:-.02em}.fab-instructions{background:#f8fafc;border:1px solid #e5e7eb;border-radius:14px;padding:14px;margin:12px 0 18px}.fab-public-question{border-radius:16px}.fab-submit,.fab-crossword-check,.fab-flashcard-controls button{transition:transform .08s,box-shadow .12s}.fab-submit:hover,.fab-crossword-check:hover,.fab-flashcard-controls button:hover{transform:translateY(-1px);box-shadow:0 5px 14px rgba(29,78,216,.18)}.fab-feedback.ok{background:#dcfce7;color:#166534;border-radius:10px;padding:8px 10px}.fab-feedback.no{background:#fee2e2;color:#991b1b;border-radius:10px;padding:8px 10px}.fab-finish-screen{margin:18px auto 0;text-align:center;background:linear-gradient(180deg,#f8fafc,#fff);border:1px solid #dbeafe;border-radius:18px;padding:18px;box-shadow:0 4px 18px rgba(15,23,42,.08)}.fab-finish-screen strong{display:block;font-size:22px;color:#0f172a;margin-bottom:4px}.fab-progress-pill{display:inline-flex;align-items:center;gap:6px;background:#eff6ff;color:#1d4ed8;border:1px solid #bfdbfe;border-radius:999px;padding:6px 10px;font-weight:700;margin:8px 0}.fab-wordhunt.classic .fab-wordhunt-grid{max-width:100%;overflow:auto;padding:8px}.fab-wordhunt.classic .fab-wordhunt-grid button:focus,.fab-cw-cell input:focus,.fab-option input:focus{outline:3px solid #93c5fd;outline-offset:2px}.fab-wordhunt.classic .fab-wordhunt-result,.fab-crossword-result{min-height:24px;margin-top:10px}.fab-crossword-grid{padding:8px}.fab-crossword-clues .fab-clue{line-height:1.45}.fab-memory-message{min-height:24px}.fab-memory-tile{transition:transform .12s,box-shadow .12s,background .12s}.fab-memory-tile:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(15,23,42,.08)}.fab-memory-tile.matched{border-color:#16a34a!important;background:#dcfce7!important}.fab-small{color:#64748b}@media(max-width:650px){.fab-public-activity{padding:14px;border-radius:14px}.fab-public-activity h3{font-size:20px}.fab-option{padding:10px}.fab-crossword-grid,.fab-wordhunt.classic .fab-wordhunt-grid{justify-content:flex-start}.fab-flashcard-deck{margin:10px auto}.fab-finish-screen{padding:14px}}