:root{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.5;font-weight:400;color:#2c3e50;background:linear-gradient(135deg,#f5f7fa,#c3cfe2);min-height:100vh;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{margin:0;padding:0;min-height:100vh}#root{min-height:100vh}*{box-sizing:border-box}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;background:linear-gradient(135deg,#f5f7fa,#c3cfe2);min-height:100vh;margin:0;padding:0;color:#2c3e50}.app{max-width:600px;margin:0 auto;padding:20px;min-height:100vh}.header{text-align:center;margin-bottom:20px}.header h1{font-size:1.8rem;color:#2c3e50;margin:0 0 5px}.header h2{font-size:1.2rem;color:#7f8c8d;margin:0;font-weight:400}.version-text{font-size:.8rem;color:#7f8c8d;margin:5px 0 0}.mode-selector{display:flex;justify-content:center;gap:10px;margin-bottom:15px}.mode-button{padding:8px 20px;font-size:.9rem;border-radius:20px;border:2px solid #a29bfe;background:#fff;color:#6c5ce7;cursor:pointer;transition:all .3s ease}.mode-button:hover{border-color:#6c5ce7}.mode-button.active{background:linear-gradient(135deg,#a29bfe,#6c5ce7);color:#fff;border-color:#6c5ce7}.list-selector{display:flex;justify-content:center;gap:10px;margin-bottom:15px;flex-wrap:wrap}.list-button{padding:8px 20px;border-radius:20px;border:2px solid #a29bfe;background:#fff;color:#6c5ce7;cursor:pointer;font-size:.9rem;transition:all .3s ease}.list-button.active{background:linear-gradient(135deg,#a29bfe,#6c5ce7);color:#fff;border-color:#6c5ce7}.folder-hint{text-align:center;color:#7f8c8d;margin-bottom:15px}.folders-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.folder-button{padding:20px 15px;font-size:1rem;border-radius:16px;border:none;background:linear-gradient(135deg,#74b9ff,#0984e3);color:#fff;cursor:pointer;box-shadow:0 6px 20px #0984e34d;transition:all .3s ease;display:flex;flex-direction:column;align-items:center;gap:8px}.folder-button:hover{transform:translateY(-3px);box-shadow:0 10px 30px #0984e366}.folder-button.completed{background:linear-gradient(135deg,#55efc4,#00b894);box-shadow:0 6px 20px #00b8944d}.word-count{font-size:.8rem;opacity:.9}.status-bar{display:flex;flex-direction:column;padding:15px;background:linear-gradient(135deg,#f5f7fa,#c3cfe2);border-radius:12px;margin-bottom:25px;font-size:.95rem}.status-info{display:flex;flex-wrap:wrap;justify-content:center;gap:15px}.correct-stat{color:#27ae60;font-weight:600}.wrong-stat{color:#e74c3c;font-weight:600}.progress-bar-container{height:8px;background:#dfe6e9;border-radius:4px;margin-top:12px;overflow:hidden}.progress-bar{height:100%;background:linear-gradient(90deg,#00b894,#55efc4);border-radius:4px;transition:width .3s ease}.training-container{background:#fff;border-radius:20px;padding:30px;box-shadow:0 10px 40px #0000001a;text-align:center}.training-container.shake{animation:shake .4s ease-in-out}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-4px)}40%,80%{transform:translate(4px)}}.word-display{font-size:2.2rem;font-weight:700;color:#2c3e50;margin-bottom:30px;letter-spacing:2px}.missing-letter{color:#e74c3c;text-decoration:underline;text-decoration-style:dotted}.letter-options{display:flex;justify-content:center;gap:15px;flex-wrap:wrap}.letter-button{width:60px;height:60px;font-size:1.5rem;font-weight:700;border-radius:50%;border:none;background:linear-gradient(135deg,#74b9ff,#0984e3);color:#fff;cursor:pointer;box-shadow:0 4px 15px #0984e34d;transition:all .2s ease}.letter-button:hover:not(:disabled){transform:scale(1.1)}.letter-button.correct{background:linear-gradient(135deg,#55efc4,#00b894);box-shadow:0 4px 15px #00b89466}.letter-button.wrong{background:linear-gradient(135deg,#fab1a0,#e74c3c);box-shadow:0 4px 15px #e74c3c66}.letter-button:disabled{cursor:not-allowed;opacity:.7}.next-button-container{min-height:56px;display:flex;justify-content:center;align-items:center;margin-top:15px}.next-button{padding:12px 40px;font-size:1.1rem;border-radius:25px;border:none;background:linear-gradient(135deg,#a29bfe,#6c5ce7);color:#fff;cursor:pointer;box-shadow:0 4px 15px #6c5ce74d;transition:all .2s ease}.next-button:hover{transform:scale(1.05)}.bottom-buttons{display:flex;justify-content:center;gap:15px;margin-top:20px;flex-wrap:wrap}.nav-button{padding:12px 30px;font-size:1rem;border-radius:25px;border:none;cursor:pointer;transition:all .2s ease}.nav-button.folders{background:linear-gradient(135deg,#74b9ff,#0984e3);color:#fff}.nav-button.next{background:linear-gradient(135deg,#55efc4,#00b894);color:#fff}.nav-button.errors{background:linear-gradient(135deg,#fab1a0,#e74c3c);color:#fff}.nav-button:hover{transform:translateY(-2px)}.stats-card{background:#fff;border-radius:20px;padding:25px;box-shadow:0 10px 40px #0000001a}.stats-unified p{margin:5px 0;font-size:1rem;color:#2c3e50;text-align:center}.stats-unified .progress-info{color:#7f8c8d;font-size:.9rem;margin-top:10px}.stats-card h3{margin:20px 0 10px;color:#2c3e50}.error-words-list{list-style:none;padding:0;margin:10px 0}.error-word-item{display:block;padding:8px 12px;margin:6px 0;background:linear-gradient(135deg,#ff6b6b,#ee5a5a);color:#fff;border-radius:8px;font-weight:500}.train-errors-btn{display:block;width:100%;margin-top:15px;padding:12px 25px;font-size:1rem;border-radius:20px;border:none;background:linear-gradient(135deg,#fdcb6e,#f39c12);color:#fff;cursor:pointer;transition:all .2s ease}.train-errors-btn:hover{transform:translateY(-2px)}.success-message{color:#27ae60;font-weight:700;text-align:center;font-size:1.1rem;margin:20px 0}.history-section{margin-top:30px}.history-title{font-size:1.1rem;color:#7f8c8d;margin-bottom:15px;text-align:center}.history-item{background:#fff;border-radius:12px;padding:15px;margin-bottom:10px;box-shadow:0 4px 15px #00000014}.history-item.dimmed{opacity:.6}.history-item-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px;flex-wrap:wrap;gap:8px}.history-item-title{font-weight:600;color:#2c3e50}.history-item-date{font-size:.8rem;color:#95a5a6}.history-item-stats{font-size:.9rem;color:#7f8c8d}.history-item-errors{margin-top:8px;font-size:.85rem;color:#e74c3c}.clear-history-btn{display:block;margin:20px auto 0;padding:8px 20px;font-size:.85rem;border-radius:15px;border:1px solid #e74c3c;background:#fff;color:#e74c3c;cursor:pointer;transition:all .2s ease}.clear-history-btn:hover{background:#e74c3c;color:#fff}.confetti-container{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;overflow:hidden;z-index:1000}.confetti-piece{position:absolute;width:10px;height:10px;animation:confetti-fall 1s ease-out forwards}@keyframes confetti-fall{0%{transform:translateY(-20px) rotate(0);opacity:1}to{transform:translateY(100vh) rotate(720deg);opacity:0}}@media(max-width:400px){.folders-grid{grid-template-columns:repeat(2,1fr)}.word-display{font-size:1.8rem}.letter-button{width:50px;height:50px;font-size:1.2rem}}