*{box-sizing:border-box}: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}.app{min-height:100vh;padding:20px;max-width:600px;margin:0 auto;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.header{text-align:center;margin-bottom:30px}.header h1{font-size:2rem;color:#2c3e50;margin:0 0 5px}.header h2{font-size:1.2rem;color:#7f8c8d;margin:0;font-weight:400}.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 #bdc3c7;background:#fff;color:#7f8c8d;cursor:pointer;transition:all .3s 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0}.folders-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:15px;margin-bottom:30px}.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:active{transform:translateY(0)}.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;color:#2c3e50}.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{width:100%;height:8px;background:#0000001a;border-radius:4px;overflow:hidden;margin-top:10px}.progress-bar{height:100%;background:linear-gradient(90deg,#00b894,#55efc4,#00b894);background-size:200% 100%;border-radius:4px;transition:width .4s ease;animation:progressShimmer 1.5s ease-in-out infinite}@keyframes progressShimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.training-container{display:flex;flex-direction:column;align-items:center;gap:25px;padding:30px;background:#fff;border-radius:20px;box-shadow:0 10px 40px #0000001a;margin-bottom:25px}.word-display{font-size:2.5rem;font-weight:700;color:#1a3a5c;letter-spacing:2px;text-align:center}.result-container{min-height:60px;display:flex;align-items:center;justify-content:center;padding:15px 30px;border-radius:12px;transition:all .3s ease}.result-container.correct{background:linear-gradient(135deg,#d4edda,#b8e6c1)}.result-container.wrong{background:linear-gradient(135deg,#f8d7da,#f5c6cb)}.result-word{font-size:2rem;font-weight:700;letter-spacing:2px}.result-container.correct .result-word{color:#155724}.result-container.wrong .result-word{color:#c0392b}.letters-container{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.letters-container.ten-letters{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;max-width:320px;margin:0 auto}.letter-button{width:80px;height:80px;font-size:2rem;font-weight:700;border-radius:16px;border:none;background:linear-gradient(135deg,#4a3cb8,#6c5ce7,#5b4ccc,#4834d4,#6c5ce7,#4a3cb8);background-size:300% 300%;color:#fff;cursor:pointer;box-shadow:0 6px 20px #6c5ce766;transition:all .3s ease;text-transform:lowercase;animation:buttonPulse 2s ease-in-out infinite,shimmerGradient 3s ease-in-out infinite}@keyframes buttonPulse{0%,to{transform:scale(1);box-shadow:0 6px 20px #6c5ce766}50%{transform:scale(1.05);box-shadow:0 8px 25px #6c5ce799}}@keyframes shimmerGradient{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}.letter-button:hover:not(:disabled){transform:translateY(-3px) scale(1.05);box-shadow:0 10px 30px #6c5ce780}.letter-button:active:not(:disabled){transform:translateY(0) scale(.98)}.letter-button:disabled{cursor:not-allowed;animation:none}.letter-button.correct{background:linear-gradient(135deg,#00b894,#55efc4);box-shadow:0 6px 20px #00b89466}.letter-button.wrong{background:linear-gradient(135deg,#e17055,#fab1a0);box-shadow:0 6px 20px #e1705566}.letter-button.small{width:56px;height:56px;font-size:1.5rem;border-radius:12px;animation:shimmerGradient 3s ease-in-out infinite}.letter-button.small:hover:not(:disabled){transform:translateY(-2px) scale(1.03)}.next-button{padding:15px 40px;font-size:1.1rem;font-weight:600;border-radius:12px;border:none;background:linear-gradient(135deg,#00b894,#00cec9);color:#fff;cursor:pointer;box-shadow:0 6px 20px #00b89466;transition:all .3s ease}.next-button:hover{transform:translateY(-2px);box-shadow:0 10px 30px #00b89480}.next-button:active{transform:translateY(0)}.bottom-buttons{display:flex;flex-wrap:wrap;gap:15px;justify-content:center;margin-top:20px}.nav-button{padding:12px 25px;font-size:1rem;font-weight:500;border-radius:12px;border:none;background:linear-gradient(135deg,#636e72,#b2bec3);color:#fff;cursor:pointer;box-shadow:0 4px 15px #636e724d;transition:all .3s ease}.nav-button:hover{transform:translateY(-2px);box-shadow:0 8px 25px #636e7266}.nav-button.next{background:linear-gradient(135deg,#0984e3,#74b9ff);box-shadow:0 4px 15px #0984e34d}.nav-button.continue,.nav-button.folders{background:linear-gradient(135deg,#00b894,#55efc4);box-shadow:0 4px 15px #00b8944d}.nav-button.errors{background:linear-gradient(135deg,#e17055,#fab1a0);box-shadow:0 4px 15px #e170554d}.stats-card{background:#fff;border-radius:20px;padding:25px;box-shadow:0 10px 40px #0000001a;margin-bottom:25px}.stats-card.latest{border:3px solid #00b894}.stats-card.faded{opacity:.6;background:#f8f9fa}.stats-card.faded .stats-card-header{font-weight:600;color:#7f8c8d;font-size:1rem;margin-bottom:10px;padding-bottom:10px;border-bottom:1px solid #ddd}.stats-card.faded h4{margin:15px 0 10px;color:#7f8c8d;font-size:.95rem}.previous-results-section{margin-top:20px}.previous-results-section h3{color:#7f8c8d;font-size:1rem;margin-bottom:15px}.stats-row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px solid #ecf0f1;font-size:1rem}.stats-row:last-child{border-bottom:none}.stats-row.correct span:last-child{color:#27ae60;font-weight:600}.stats-row.wrong span:last-child{color:#e74c3c;font-weight:600}.stats-card h3{margin:20px 0 15px;color:#2c3e50;font-size:1.1rem}.wrong-words-list{display:flex;flex-wrap:wrap;gap:10px}.wrong-word{background:linear-gradient(135deg,#ffeaa7,#fdcb6e);padding:8px 15px;border-radius:8px;font-size:.95rem;color:#2d3436}.wrong-word.still-wrong{background:linear-gradient(135deg,#ff7675,#e74c3c);color:#fff}.wrong-word.now-correct{background:linear-gradient(135deg,#55efc4,#00b894);color:#fff}.error-training-label{color:#e17055;font-size:1rem;font-weight:600;margin-top:5px}.train-errors-btn{width:100%;margin-top:20px;padding:15px;font-size:1rem;font-weight:600;border-radius:12px;border:none;background:linear-gradient(135deg,#e17055,#fab1a0);color:#fff;cursor:pointer;box-shadow:0 6px 20px #e1705566;transition:all .3s 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h3{color:#7f8c8d;font-size:1rem;margin-bottom:15px}.error-history-item{margin-bottom:15px;padding:12px;background:#00000005;border-radius:10px}.error-history-header{display:flex;justify-content:space-between;font-size:.85rem;color:#95a5a6;margin-bottom:8px}.wrong-words-list.faded{opacity:.6}.wrong-words-list.faded .wrong-word{font-size:.85rem}@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.02)}to{transform:scale(1)}}.result-container.correct,.result-container.wrong{animation:pulse .3s ease}@keyframes shake{0%,to{transform:translate(0)}10%,30%,50%,70%,90%{transform:translate(-8px)}20%,40%,60%,80%{transform:translate(8px)}}.training-container.shake{animation:shake .5s cubic-bezier(.36,.07,.19,.97) both}.confetti-container{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;overflow:hidden;z-index:100}.confetti-piece{position:absolute;top:50%;border-radius:2px;animation:confetti-fall 1.5s ease-out forwards}@keyframes 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