*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}:root{--blue: #3B82F6;--blue-dark: #2563EB;--blue-light: #DBEAFE;--green: #22C55E;--green-dark: #16A34A;--green-light: #DCFCE7;--orange: #F59E0B;--orange-dark: #D97706;--orange-light: #FEF3C7;--red: #EF4444;--red-dark: #DC2626;--red-light: #FEE2E2;--purple: #8B5CF6;--gray-50: #F9FAFB;--gray-100: #F3F4F6;--gray-200: #E5E7EB;--gray-400: #9CA3AF;--gray-600: #4B5563;--gray-800: #1F2937;--bg: #FFF8F0;--radius: 16px;--radius-sm: 10px;--shadow: 0 4px 16px rgba(0,0,0,.1);--shadow-sm: 0 2px 8px rgba(0,0,0,.08)}body{font-family:Nunito,system-ui,sans-serif;background:var(--bg);color:var(--gray-800);min-height:100vh;line-height:1.5}.app{max-width:900px;margin:0 auto;padding:20px 16px 60px}button{font-family:inherit;cursor:pointer;border:none;outline:none}button:disabled{opacity:.45;cursor:not-allowed}input{font-family:inherit}.welcome-screen{display:flex;flex-direction:column;gap:24px}.welcome-hero{text-align:center;padding:32px 16px 8px}.welcome-hero h1{font-size:clamp(2rem,6vw,3rem);font-weight:900;color:var(--blue-dark)}.subtitle{font-size:1.15rem;color:var(--gray-600);margin-top:8px}.welcome-card,.highscores-card{background:#fff;border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}.form-group{margin-bottom:24px}.form-group label{display:block;font-weight:700;font-size:1.1rem;margin-bottom:10px;color:var(--gray-800)}.name-input{width:100%;padding:14px 18px;border:3px solid var(--gray-200);border-radius:var(--radius-sm);font-size:1.2rem;font-weight:600;transition:border-color .2s}.name-input:focus{border-color:var(--blue);outline:none}.table-buttons{display:flex;flex-wrap:wrap;gap:10px}.table-btn{width:52px;height:52px;border-radius:var(--radius-sm);background:var(--gray-100);color:var(--gray-800);font-size:1.25rem;font-weight:800;transition:all .15s}.table-btn:hover{background:var(--blue-light);color:var(--blue-dark)}.table-btn.active{background:var(--blue);color:#fff;box-shadow:0 3px 10px #3b82f666;transform:scale(1.1)}.table-hint{margin-top:10px;font-size:.95rem;color:var(--gray-600);font-style:italic}.start-btn{width:100%;padding:18px;background:var(--green);color:#fff;border-radius:var(--radius-sm);font-size:1.4rem;font-weight:900;letter-spacing:.5px;transition:all .2s;box-shadow:0 4px 14px #22c55e66}.start-btn:hover:not(:disabled){background:var(--green-dark);transform:translateY(-2px)}.highscores-card h2{font-size:1.4rem;font-weight:800;margin-bottom:12px}.hs-overview{display:flex;flex-direction:column;gap:6px}.hs-overview-row{display:flex;flex-direction:column;gap:3px;padding:10px 12px;background:var(--gray-50);border-radius:8px;font-size:.95rem}.hs-row-main{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.hs-overview-label{font-weight:700;color:var(--gray-800);min-width:100px}.hs-top-score{color:var(--gray-800)}.hs-top-score strong{color:var(--blue-dark)}.hs-no-score{color:var(--gray-400);font-style:italic}.hs-row-cta{font-size:.82rem;color:var(--blue-dark);font-weight:600;padding-left:2px}.hs-nl-block{display:flex;flex-direction:column;gap:6px;padding:10px 12px;background:var(--gray-50);border-radius:8px}.hs-nl-block-label{font-weight:800;font-size:.95rem;color:var(--gray-800)}.hs-nl-entries{display:flex;flex-wrap:wrap;gap:6px 20px;align-items:center}.hs-nl-entry{font-size:.9rem;color:var(--gray-800)}.hs-nl-entry strong{color:var(--blue-dark)}.hs-tabs{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}.hs-tab{width:36px;height:36px;border-radius:8px;background:var(--gray-100);color:var(--gray-600);font-size:.95rem;font-weight:700;transition:all .15s}.hs-tab.active{background:var(--orange);color:#fff}.hs-tab:hover{background:var(--orange-light);color:var(--orange-dark)}.hs-list{display:flex;flex-direction:column;gap:8px}.hs-row{display:flex;align-items:center;gap:12px;padding:10px 14px;background:var(--gray-50);border-radius:var(--radius-sm)}.hs-medal{font-size:1.3rem}.hs-name{flex:1;font-weight:700}.hs-time{font-weight:800;color:var(--blue-dark);font-size:1.1rem}.hs-empty{color:var(--gray-400);font-style:italic;text-align:center;padding:12px 0}.exercise-manager{display:flex;flex-direction:column;gap:20px}.progress-header{background:var(--blue-dark);color:#fff;border-radius:var(--radius);padding:16px 20px;display:flex;flex-direction:column;gap:12px}.progress-info{display:flex;justify-content:space-between;align-items:center}.progress-table{font-size:1.3rem;font-weight:900}.progress-timer{font-size:1.1rem;font-weight:700;background:#ffffff26;padding:4px 12px;border-radius:8px}.progress-exercises{display:flex;gap:10px;flex-wrap:wrap}.progress-pill{padding:6px 14px;border-radius:20px;font-size:.9rem;font-weight:700;display:flex;align-items:center;gap:6px}.progress-pill.done{background:var(--green)}.progress-pill.active{background:var(--orange)}.progress-pill.pending{background:#fff3}.progress-need{font-size:.9rem;opacity:.8}.exercise-wrapper{background:#fff;border-radius:var(--radius);padding:24px 20px;box-shadow:var(--shadow)}.skip-row{text-align:center}.skip-btn{background:transparent;color:var(--gray-600);font-size:.95rem;font-weight:600;text-decoration:underline;padding:8px 16px;border-radius:8px;transition:color .15s}.skip-btn:hover{color:var(--blue-dark)}.exercise-header{margin-bottom:24px}.exercise-header h2{font-size:1.5rem;font-weight:900;display:flex;align-items:center;gap:12px;flex-wrap:wrap}.table-badge{background:var(--blue);color:#fff;font-size:1rem;padding:4px 14px;border-radius:20px;font-weight:700}.exercise-desc{margin-top:6px;color:var(--gray-600);font-size:1rem}.complete-banner{margin-top:16px;background:var(--green-light);color:var(--green-dark);border-radius:var(--radius-sm);padding:14px 20px;font-weight:800;font-size:1.1rem;text-align:center}.complete-banner.big{font-size:1.4rem;padding:24px}.problems-list{display:flex;flex-direction:column;gap:10px;max-width:520px}.problem-row{display:flex;align-items:center;gap:10px}.problem-label{font-size:1.1rem;font-weight:700;min-width:95px;text-align:right;flex-shrink:0}.drop-zone{width:80px;height:46px;flex-shrink:0;border:3px dashed var(--gray-400);border-radius:var(--radius-sm);display:flex;align-items:center;justify-content:center;font-size:1.2rem;font-weight:800;color:var(--gray-600);background:var(--gray-100);transition:all .2s;cursor:pointer}.drop-zone.droppable{border-color:var(--blue);background:var(--blue-light)}.drop-zone.placed{background:var(--green);border-color:var(--green-dark);color:#fff;cursor:default}.answer-tile{padding:10px 18px;background:var(--blue);color:#fff;border-radius:var(--radius-sm);font-size:1.2rem;font-weight:800;cursor:grab;-webkit-user-select:none;user-select:none;transition:all .15s;box-shadow:var(--shadow-sm);min-width:64px;text-align:center}.answer-tile:hover{background:var(--blue-dark);transform:scale(1.05)}.answer-tile.selected{background:var(--orange);transform:scale(1.08);box-shadow:0 4px 14px #f59e0b80}.answer-tile:active{cursor:grabbing}.tile-placeholder{min-width:64px;height:46px}.drag-footer{margin-top:20px;display:flex;flex-direction:column;gap:10px}.attempt-info{display:flex;align-items:center;gap:16px;flex-wrap:wrap}.attempt-count{font-weight:700;color:var(--gray-600)}.score-msg{font-weight:800;font-size:1rem;padding:4px 12px;border-radius:20px}.score-great{background:var(--green-light);color:var(--green-dark)}.score-good{background:var(--orange-light);color:var(--orange-dark)}.score-ok{background:var(--blue-light);color:var(--blue-dark)}.fillin-grid{display:flex;gap:24px;flex-wrap:wrap}.fillin-col{display:flex;flex-direction:column;gap:12px;flex:1;min-width:240px}.fillin-row{display:flex;align-items:center;gap:10px;padding:6px 10px;border-radius:var(--radius-sm);transition:background .2s}.fillin-row.correct{background:var(--green-light)}.fillin-row.wrong{background:var(--red-light)}.fillin-label{font-size:1.2rem;font-weight:700;min-width:90px}.fillin-input{width:80px;padding:8px 10px;border:3px solid var(--gray-200);border-radius:8px;font-size:1.2rem;font-weight:700;text-align:center;transition:border-color .2s}.fillin-input:focus{border-color:var(--blue);outline:none}.fillin-input:disabled{background:transparent;opacity:1}.fillin-input::-webkit-outer-spin-button,.fillin-input::-webkit-inner-spin-button{-webkit-appearance:none}.fillin-input[type=number]{-moz-appearance:textfield}.fillin-icon{font-size:.95rem;font-weight:700;color:var(--red-dark)}.fillin-row.correct .fillin-icon{color:var(--green-dark)}.fillin-footer{margin-top:24px}.check-btn{padding:14px 32px;background:var(--blue);color:#fff;border-radius:var(--radius-sm);font-size:1.2rem;font-weight:800;transition:all .2s;box-shadow:0 4px 14px #3b82f659}.check-btn:hover:not(:disabled){background:var(--blue-dark);transform:translateY(-2px)}.check-result{display:flex;flex-direction:column;gap:14px}.score-display{font-size:1.3rem;font-weight:800;color:var(--gray-800)}.retry-btn{display:inline-block;padding:12px 28px;background:var(--orange);color:#fff;border-radius:var(--radius-sm);font-size:1.1rem;font-weight:800;transition:all .2s}.retry-btn:hover{background:var(--orange-dark);transform:translateY(-2px)}.mc-layout{display:flex;gap:24px;align-items:flex-start;flex-wrap:wrap}.mc-score-panel{display:flex;flex-direction:column;align-items:center;gap:4px;min-width:100px}.mc-score-box{display:flex;flex-direction:column;align-items:center;justify-content:center;width:80px;height:64px;border-radius:var(--radius-sm);margin-top:12px;color:#fff}.mc-score-box.green{background:var(--green)}.mc-score-box.red{background:var(--red)}.mc-score-box.blue{background:var(--blue)}.mc-score-icon{font-size:1rem}.mc-score-num{font-size:1.5rem;font-weight:900}.mc-score-sub{font-size:.8rem;color:var(--gray-600);font-weight:700}.mc-question-area{flex:1;min-width:260px}.mc-question-banner{background:var(--blue);color:#fff;border-radius:var(--radius);padding:28px;text-align:center;font-size:clamp(2.5rem,8vw,4rem);font-weight:900;margin-bottom:20px;box-shadow:0 6px 20px #3b82f659;letter-spacing:4px}.mc-choices-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.mc-choice{padding:20px;background:var(--orange);color:#fff;border-radius:var(--radius-sm);font-size:1.6rem;font-weight:900;text-align:center;transition:all .15s;box-shadow:0 4px 12px #f59e0b4d}.mc-choice:hover:not(:disabled){background:var(--orange-dark);transform:scale(1.04)}.mc-choice.correct{background:var(--green);box-shadow:0 4px 14px #22c55e80}.mc-choice.wrong{background:var(--red);box-shadow:0 4px 14px #ef444480;animation:shake .4s ease}.mc-choice.dimmed{opacity:.4}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-6px)}75%{transform:translate(6px)}}.mc-done{padding:24px 0}.celebration-screen{display:flex;flex-direction:column;align-items:center;gap:32px;padding:20px 0;text-align:center}.celebration-hero h1{font-size:clamp(2rem,6vw,3rem);font-weight:900;color:var(--blue-dark);margin:16px 0 8px}.celebration-subtitle{font-size:1.2rem;color:var(--gray-600)}.trophy{font-size:5rem;margin:8px 0;animation:bounce .8s infinite alternate}@keyframes bounce{to{transform:translateY(-10px)}}.confetti-row{font-size:2rem;letter-spacing:8px}.confetti-row.bottom{opacity:.6}.celebration-stats{display:flex;gap:20px;flex-wrap:wrap;justify-content:center}.stat-card{background:#fff;border-radius:var(--radius);padding:24px 28px;box-shadow:var(--shadow);min-width:140px;display:flex;flex-direction:column;align-items:center;gap:8px}.stat-card.highlight{background:var(--blue);color:#fff}.stat-icon{font-size:2rem}.stat-value{font-size:2rem;font-weight:900}.stat-label{font-size:.9rem;font-weight:700;opacity:.75}.restart-btn{padding:18px 40px;background:var(--green);color:#fff;border-radius:var(--radius-sm);font-size:1.3rem;font-weight:900;transition:all .2s;box-shadow:0 4px 16px #22c55e66}.restart-btn:hover{background:var(--green-dark);transform:translateY(-2px)}@media (max-width: 600px){.drag-layout{flex-direction:column}.tiles-column{max-width:100%}.mc-layout{flex-direction:column}.mc-score-panel{flex-direction:row;flex-wrap:wrap;justify-content:center;min-width:auto}.mc-score-box{margin-top:0}.fillin-grid{flex-direction:column}}.welcome-footer{text-align:center;color:var(--gray-400);font-size:.8rem;margin-top:12px;padding-bottom:24px}.nl-sublevel-bar{display:flex;gap:10px;margin-bottom:20px;flex-wrap:wrap}.nl-sublevel-pill{display:flex;align-items:center;gap:6px;padding:6px 16px;border-radius:20px;font-size:.9rem;font-weight:800}.nl-sublevel-pill.done{background:var(--green);color:#fff}.nl-sublevel-pill.active{background:var(--orange);color:#fff}.nl-sublevel-pill.pending{background:var(--gray-200);color:var(--gray-600)}.nl-round-badge{background:#ffffff4d;border-radius:10px;padding:1px 7px;font-size:.8rem}.nl-sub-title{font-size:1.2rem;font-weight:700;margin-bottom:4px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.nl-range-badge{background:var(--blue-light);color:var(--blue-dark);font-size:.9rem;font-weight:700;padding:3px 12px;border-radius:20px}.nl-outer{padding:4px 16px;overflow:visible}.nl-line{position:relative;height:106px;-webkit-user-select:none;user-select:none;border-radius:var(--radius-sm);transition:background .2s}.nl-line.nl-line-ready{cursor:crosshair;background:var(--blue-light);border-radius:var(--radius-sm);outline:2px dashed var(--blue);outline-offset:2px}.nl-track{position:absolute;top:46px;left:0;right:0;height:8px;background:linear-gradient(to right,var(--blue-dark),var(--purple));border-radius:4px;pointer-events:none}.nl-hover-tip{position:absolute;top:6px;transform:translate(-50%);background:var(--orange);color:#fff;font-size:.8rem;font-weight:800;padding:2px 8px;border-radius:8px;pointer-events:none;white-space:nowrap;z-index:10;box-shadow:var(--shadow-sm)}.nl-anchor{position:absolute;top:54px;transform:translate(-50%);display:flex;flex-direction:column;align-items:center;pointer-events:none}.nl-anchor-tick{width:3px;height:16px;background:var(--gray-800);border-radius:2px}.nl-anchor-label{margin-top:3px;font-size:.82rem;font-weight:800;color:var(--gray-800);white-space:nowrap}.nl-chip-wrap{position:absolute;top:6px;transform:translate(-50%);display:flex;flex-direction:column;align-items:center;pointer-events:none;z-index:5}.nl-chip{height:24px;line-height:24px;padding:0 8px;background:var(--green);color:#fff;border-radius:8px;font-size:.82rem;font-weight:900;white-space:nowrap;animation:nl-pop .35s cubic-bezier(.175,.885,.32,1.275);box-shadow:0 2px 8px #22c55e66}.nl-chip-stem{width:2px;height:16px;background:var(--green-dark);border-radius:1px}@keyframes nl-pop{0%{transform:scale(.2);opacity:0}70%{transform:scale(1.2)}to{transform:scale(1);opacity:1}}.nl-tiles{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 8px;min-height:46px}.nl-tile{padding:10px 16px;background:var(--blue);color:#fff;border-radius:var(--radius-sm);font-size:1.15rem;font-weight:800;cursor:grab;-webkit-user-select:none;user-select:none;transition:all .15s;box-shadow:var(--shadow-sm);min-width:60px;text-align:center}.nl-tile:hover{background:var(--blue-dark);transform:scale(1.06)}.nl-tile:active{cursor:grabbing}.nl-tile.selected{background:var(--orange);transform:scale(1.1);box-shadow:0 4px 14px #f59e0b80}.nl-tile.wrong{background:var(--red);animation:nl-shake .45s ease}@keyframes nl-shake{0%,to{transform:translate(0)}20%{transform:translate(-8px)}50%{transform:translate(8px)}75%{transform:translate(-5px)}}.nl-status{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;margin-top:4px;min-height:28px}.nl-hint{color:var(--blue-dark);font-size:.95rem;font-weight:600}.nl-count{font-size:.95rem;font-weight:700;color:var(--gray-600)}.nl-rounds-info{color:var(--gray-400);font-weight:600}.nl-entry-card{background:linear-gradient(135deg,var(--blue-light),#EDE9FE);border:2px solid var(--blue);border-radius:var(--radius);padding:20px 24px;display:flex;flex-direction:column;gap:16px}.nl-entry-info h3{font-size:1.15rem;font-weight:900;color:var(--blue-dark);margin-bottom:4px}.nl-entry-info p{font-size:.9rem;color:var(--gray-600)}.nl-entry-levels{display:flex;gap:10px;flex-wrap:wrap}.nl-level-btn{flex:1;min-width:120px;display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px 10px;background:var(--blue);color:#fff;border-radius:var(--radius-sm);font-weight:700;transition:all .18s;box-shadow:0 3px 10px #3b82f64d}.nl-level-btn:hover{background:var(--blue-dark);transform:translateY(-2px);box-shadow:0 5px 16px #3b82f666}.nl-level-icon{font-size:1.2rem}.nl-level-label{font-size:.88rem;font-weight:700}.nl-level-range{font-size:.75rem;opacity:.8}.hs-header{display:flex;align-items:center;justify-content:space-between;width:100%;background:none;padding:0;cursor:pointer}.hs-header h2{font-size:1.4rem;font-weight:800;margin-bottom:0}.hs-toggle{font-size:.9rem;color:var(--gray-400)}.hs-expand-btn{margin-top:10px;width:100%;padding:8px;background:var(--gray-100);color:var(--gray-600);border-radius:var(--radius-sm);font-size:.88rem;font-weight:700;transition:background .15s}.hs-expand-btn:hover{background:var(--gray-200)}@media (max-width: 600px){.nl-outer{padding:4px}.nl-anchor-label{font-size:.72rem}.nl-tile{padding:8px 12px;font-size:1rem;min-width:52px}}