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14px}.mr-stat-value{font-variant-numeric:tabular-nums;font-size:1.4rem;font-weight:700;line-height:1.2;display:block}.mr-stat-value--green{color:var(--accent-green)}.mr-stat-value--red{color:var(--accent-red)}.mr-stat-value--blue{color:var(--accent-blue)}.mr-stat-value--orange{color:var(--accent-orange)}.mr-stat-label{text-transform:uppercase;letter-spacing:.6px;color:var(--text-muted);font-size:10.5px;font-weight:600}.mr-mastery{margin-top:14px}.mr-mastery-head{color:var(--text-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:7px;font-size:12px;display:flex}.mr-mastery-legend{flex-wrap:wrap;gap:12px;display:flex}.mr-mastery-legend>span{align-items:center;gap:5px;display:inline-flex}.mr-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px;display:inline-block}.mr-bar{background:var(--bg-tertiary);border-radius:4px;height:7px;display:flex;overflow:hidden}.mr-bar-seg{transition:width .3s}.mr-sliders{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;margin-top:18px;display:grid}.mr-slider-head{color:var(--text-secondary);justify-content:space-between;align-items:baseline;margin-bottom:6px;font-size:12.5px;display:flex}.mr-slider-value{font-variant-numeric:tabular-nums;color:var(--accent-blue);font-weight:600}.mr-slider{width:100%;accent-color:var(--accent-blue);cursor:pointer}.mr-slider-note{color:var(--text-muted);margin-top:5px;font-size:11.5px}.mr-lesson{flex-wrap:wrap;align-items:center;gap:10px;margin-top:12px;display:flex}.mr-lesson-chars{font-family:var(--font-mono);letter-spacing:2px;color:var(--text-secondary);word-break:break-all;font-size:14px}.mr-new-char{color:var(--accent-green);font-weight:700}.mr-tabs{border-bottom:1px solid var(--border);flex-wrap:wrap;gap:6px;margin-bottom:22px;display:flex}.mr-tab{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-bottom:2px solid #0000;margin-bottom:-1px;padding:10px 14px;font-family:inherit;font-size:13.5px;transition:color .15s,border-color .15s}.mr-tab:hover{color:var(--text-secondary)}.mr-tab--active{color:var(--accent-blue);border-bottom-color:var(--accent-blue);font-weight:600}.mr-pattern{font-family:var(--font-mono);letter-spacing:3px;color:var(--accent-blue);white-space:nowrap}.mr-pattern--lg{letter-spacing:6px;font-size:2rem}.mr-rhythm{color:var(--text-muted);font-size:12.5px;font-style:italic}.mr-char-chip{background:var(--bg-tertiary);border:1px solid var(--border);min-width:30px;font-family:var(--font-mono);color:var(--accent-blue);border-radius:6px;justify-content:center;align-items:center;padding:2px 7px;font-weight:700;display:inline-flex}.mr-play-btn{border:1px solid var(--border);color:var(--text-muted);cursor:pointer;background:0 0;border-radius:6px;padding:2px 7px;font-size:12px;line-height:1.6;transition:color .15s,border-color .15s}.mr-play-btn:hover{color:var(--accent-blue);border-color:var(--accent-blue)}.mr-play-btn--on{color:var(--accent-green);border-color:var(--accent-green)}.mr-lamp{background:var(--bg-tertiary);border:1px solid var(--border-sub);border-radius:6px;width:100%;height:10px;transition:background 50ms,box-shadow 50ms}.mr-lamp--on{background:var(--accent-green);box-shadow:0 0 14px #a3be8c99}.mr-drill{background:var(--bg-tertiary);border:1px solid var(--border-sub);text-align:center;border-radius:10px;margin:16px 0;padding:20px}.mr-drill-hint{color:var(--text-muted);margin-top:10px;font-size:12.5px}.mr-answer{background:var(--bg-primary);border:1px solid var(--border);width:100%;color:var(--text-primary);font-family:var(--font-mono);letter-spacing:6px;text-align:center;text-transform:uppercase;border-radius:10px;padding:14px 16px;font-size:1.35rem;transition:border-color .15s}.mr-answer:focus{border-color:var(--accent-blue);outline:none}.mr-answer:disabled{opacity:.7}.mr-cells{flex-wrap:wrap;justify-content:center;gap:8px;margin:16px 0;display:flex}.mr-cell{border:1px solid var(--border);background:var(--bg-tertiary);text-align:center;border-radius:10px;min-width:56px;padding:8px 6px}.mr-cell--ok{border-color:var(--accent-green);background:#a3be8c1f}.mr-cell--bad{border-color:var(--accent-red);background:#bf616a1f}.mr-cell-char{font-family:var(--font-mono);font-size:1.3rem;font-weight:700;line-height:1.3;display:block}.mr-cell-got{color:var(--accent-red);min-height:15px;font-size:11px;text-decoration:line-through;display:block}.mr-cell-pattern{font-family:var(--font-mono);letter-spacing:1px;color:var(--text-muted);font-size:11px;display:block}.mr-feedback{border-radius:10px;margin-top:4px;padding:13px 16px;font-size:14px;font-weight:600}.mr-feedback--correct{color:var(--accent-green);background:#a3be8c1f}.mr-feedback--wrong{color:var(--accent-red);background:#bf616a1f}.mr-feedback--info{color:var(--accent-blue);background:#88c0d01f}.mr-advance{border:1px solid var(--accent-green);color:var(--text-secondary);background:#a3be8c1a;border-radius:10px;flex-wrap:wrap;align-items:center;gap:12px;margin-top:16px;padding:12px 16px;font-size:13.5px;display:flex}.mr-key-pad{border:2px dashed var(--border);background:var(--bg-tertiary);width:100%;min-height:130px;color:var(--text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;touch-action:none;border-radius:14px;font-family:inherit;font-size:14px;transition:background 50ms,border-color 50ms,color 50ms}.mr-key-pad:hover{border-color:var(--accent-blue)}.mr-key-pad--down{border-color:var(--accent-green);color:var(--accent-green);background:#a3be8c38;border-style:solid}.mr-key-readout{background:var(--bg-primary);border:1px solid var(--border);border-radius:10px;flex-wrap:wrap;align-items:baseline;gap:10px;min-height:54px;margin-top:14px;padding:12px 16px;display:flex}.mr-key-buffer{font-family:var(--font-mono);letter-spacing:3px;color:var(--accent-orange);min-width:60px;font-size:1.1rem}.mr-key-text{font-family:var(--font-mono);letter-spacing:4px;color:var(--text-primary);word-break:break-all;font-size:1.25rem}.mr-key-target{font-family:var(--font-mono);letter-spacing:8px;color:var(--accent-blue);font-size:1.6rem;font-weight:700}.mr-question-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px;display:flex}.mr-mastery-tag{text-transform:uppercase;letter-spacing:.5px;align-items:center;gap:6px;font-size:11px;font-weight:600;display:inline-flex}.mr-prompt{margin:12px 0 6px;font-size:15px}.mr-stage{background:var(--bg-tertiary);border:1px solid var(--border-sub);text-align:center;border-radius:10px;margin:14px 0 18px;padding:22px 16px}.mr-stage-char{font-family:var(--font-mono);color:var(--accent-blue);font-size:2.6rem;font-weight:700;line-height:1.1}.mr-options{grid-template-columns:repeat(2,1fr);gap:10px;display:grid}.mr-option{background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-primary);text-align:left;cursor:pointer;border-radius:10px;align-items:center;gap:12px;padding:13px 15px;font-family:inherit;font-size:14px;transition:border-color .15s,background .15s;display:flex}.mr-option:hover:not(:disabled){border-color:var(--accent-blue)}.mr-option:disabled{cursor:default}.mr-option--correct{border-color:var(--accent-green);background:#a3be8c1f}.mr-option--wrong{border-color:var(--accent-red);background:#bf616a1f}.mr-option--dim{opacity:.45}.mr-option--out{opacity:.3;text-decoration:line-through}.mr-option-letter{background:var(--bg-primary);width:22px;height:22px;color:var(--text-muted);border-radius:5px;flex-shrink:0;justify-content:center;align-items:center;font-size:11px;font-weight:700;display:flex}.mr-option-text{font-family:var(--font-mono);letter-spacing:2px;flex:1;font-size:1.05rem}.mr-option-icon{margin-left:auto}.mr-hints{flex-direction:column;align-items:flex-start;gap:10px;margin-top:16px;display:flex}.mr-hints-note{color:var(--text-muted);font-size:11.5px}.mr-hint{border-left:3px solid var(--accent-orange);width:100%;color:var(--text-secondary);background:#ebcb8b14;border-radius:0 8px 8px 0;gap:10px;padding:10px 14px;font-size:13.5px;display:flex}.mr-hint-icon{color:var(--accent-orange)}.mr-info-label{text-transform:uppercase;letter-spacing:.6px;color:var(--text-muted);margin-bottom:3px;font-size:10.5px;font-weight:600;display:block}.mr-info{background:var(--bg-tertiary);color:var(--text-secondary);border-radius:10px;flex-direction:column;gap:12px;margin-top:16px;padding:16px;font-size:13.5px;display:flex}.mr-info-row{gap:10px;display:flex}.mr-info-icon{color:var(--accent-blue);flex-shrink:0;margin-top:2px}.mr-search{background:var(--bg-tertiary);border:1px solid var(--border);width:100%;color:var(--text-primary);border-radius:8px;margin-bottom:16px;padding:10px 14px;font-family:inherit;font-size:14px}.mr-search:focus{border-color:var(--accent-blue);outline:none}.mr-group-title{text-transform:uppercase;letter-spacing:.8px;color:var(--accent-blue);margin:20px 0 10px;font-size:11px;font-weight:700}.mr-table{grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:8px;display:grid}.mr-row{background:var(--bg-tertiary);border:1px solid var(--border-sub);border-radius:9px;align-items:center;gap:10px;padding:9px 12px;display:flex}.mr-row-main{flex:1;min-width:0}.mr-row-label{color:var(--text-muted);white-space:nowrap;text-overflow:ellipsis;font-size:11.5px;display:block;overflow:hidden}.mr-row-char{font-family:var(--font-mono);text-align:center;min-width:34px;font-size:1.15rem;font-weight:700}.mr-decoder{gap:14px;display:grid}.mr-decoder textarea{background:var(--bg-tertiary);border:1px solid var(--border);width:100%;color:var(--text-primary);font-family:var(--font-mono);resize:vertical;border-radius:10px;min-height:84px;padding:12px 14px;font-size:14px}.mr-decoder textarea:focus{border-color:var(--accent-blue);outline:none}@media (width<=640px){.mr-stats-grid{grid-template-columns:repeat(2,1fr)}.mr-options{grid-template-columns:1fr}.mr-answer{letter-spacing:4px;font-size:1.1rem}.mr-key-target{letter-spacing:5px;font-size:1.3rem}}.mr-mode{flex-wrap:wrap;gap:8px;margin-bottom:18px;display:flex}.mr-intro{border:1px solid var(--accent-blue);color:var(--text-secondary);background:#88c0d014;border-radius:12px;margin-bottom:20px;padding:16px 18px;font-size:13.5px}.mr-intro ul{margin:12px 0 0;padding-left:20px}.mr-intro li{margin-bottom:7px;line-height:1.55}.mr-intro li:last-child{margin-bottom:0}.mr-steps{flex-wrap:wrap;gap:8px;margin-bottom:20px;display:flex}.mr-step{background:var(--bg-tertiary);border:1px solid var(--border-sub);color:var(--text-muted);cursor:pointer;border-radius:10px;flex:130px;justify-content:center;align-items:center;gap:8px;padding:11px 10px;font-family:inherit;font-size:13px;transition:border-color .15s,color .15s,background .15s;display:flex}.mr-step:hover{color:var(--text-secondary)}.mr-step--done{color:var(--accent-green);border-color:#a3be8c66}.mr-step--active{border-color:var(--accent-blue);color:var(--accent-blue);background:#88c0d01f;font-weight:600}.mr-learn-cards{grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:14px;margin:18px 0;display:grid}.mr-learn-card{background:var(--bg-tertiary);border:1px solid var(--border);text-align:center;border-radius:12px;flex-direction:column;align-items:center;gap:10px;padding:22px 16px;display:flex}.mr-learn-card--done{border-color:var(--accent-green)}.mr-learn-count{color:var(--text-muted);font-size:12px}.mr-learn-card--done .mr-learn-count{color:var(--accent-green)}.mr-learn-streak{color:var(--text-muted);margin-top:18px;font-size:12.5px}.mr-learn-streak .mr-bar{margin-top:6px}.mr-learn-next{border-top:1px solid var(--border-sub);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:14px;margin-top:22px;padding-top:16px;display:flex}.mr-learn-done{text-align:center;padding:24px 12px}.mr-learn-done>i{color:var(--accent-green);font-size:2.6rem}.mr-learn-done h3{margin:12px 0 8px;font-size:1.25rem}.mr-learn-done p{color:var(--text-secondary);margin-bottom:18px;font-size:14px}.mr-option--char{justify-content:center;padding:18px 12px}.ra-btn{background:var(--bg-tertiary);border:1px solid var(--border);color:var(--text-primary);cursor:pointer;border-radius:8px;align-items:center;gap:7px;padding:9px 16px;font-family:inherit;font-size:13.5px;transition:border-color .15s,background .15s;display:inline-flex}.ra-btn:hover:not(:disabled){border-color:var(--accent-blue)}.ra-btn:disabled{opacity:.45;cursor:not-allowed}.ra-btn--sm{padding:6px 12px;font-size:12.5px}.ra-btn--full{justify-content:center;width:100%;margin-top:16px;padding:13px}.ra-btn--primary{background:var(--accent-blue);border-color:var(--accent-blue);color:var(--bg-primary);font-weight:600}.ra-btn--primary:hover:not(:disabled){filter:brightness(1.1)}.ra-btn--active{border-color:var(--accent-blue);color:var(--accent-blue);background:#88c0d01f;font-weight:600}.ra-btn--danger{color:var(--accent-red);border-color:var(--accent-red)}.ra-chips{flex-wrap:wrap;gap:8px;display:flex}.ra-card-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.ra-confirm{color:var(--text-muted);flex-wrap:wrap;align-items:center;gap:6px;font-size:12px;display:inline-flex}.ra-vacio{color:var(--text-muted);font-size:13.5px}.ra-gate{text-align:center}.ra-gate-icon{color:var(--accent-orange);margin-bottom:10px;font-size:1.8rem;display:block}.ra-gate-title{margin-bottom:6px;font-size:1.05rem;font-weight:700}.ra-gate-text{color:var(--text-muted);max-width:52ch;margin:0 auto 16px;font-size:13.5px;line-height:1.6}.ra-gate-text code,.ra-gate-title code{font-family:var(--font-mono);color:var(--accent-blue);background:#88c0d01f;border-radius:5px;padding:1px 6px}.ra-ejemplo{background:var(--bg-tertiary);border:1px solid var(--border-sub);font-family:var(--font-mono);color:var(--text-secondary);text-align:left;white-space:pre;border-radius:10px;margin-bottom:16px;padding:14px 16px;font-size:12px;line-height:1.6;overflow-x:auto}.ra-error{color:var(--accent-red);align-items:flex-start;gap:10px;margin-bottom:16px;font-size:13.5px;display:flex}.ra-stats-grid{grid-template-columns:repeat(4,1fr);gap:12px;display:grid}.ra-stat{background:var(--bg-tertiary);border:1px solid var(--border-sub);text-align:center;border-radius:10px;padding:12px 14px}.ra-stat-value{font-variant-numeric:tabular-nums;font-size:1.4rem;font-weight:700;line-height:1.2;display:block}.ra-stat-value--green{color:var(--accent-green)}.ra-stat-value--red{color:var(--accent-red)}.ra-stat-value--blue{color:var(--accent-blue)}.ra-stat-value--orange{color:var(--accent-orange)}.ra-stat-label{text-transform:uppercase;letter-spacing:.6px;color:var(--text-muted);font-size:10.5px;font-weight:600}.ra-mastery{margin-top:14px}.ra-mastery-head{color:var(--text-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:7px;font-size:12px;display:flex}.ra-mastery-legend{flex-wrap:wrap;gap:12px;display:flex}.ra-mastery-legend>span{align-items:center;gap:5px;display:inline-flex}.ra-dot{border-radius:50%;flex-shrink:0;width:8px;height:8px;display:inline-block}.ra-bar{background:var(--bg-tertiary);border-radius:4px;height:7px;display:flex;overflow:hidden}.ra-bar-seg{transition:width .3s}.ra-estado{margin-top:18px}.ra-estado-lista{color:var(--text-muted);margin:10px 0 0;padding-left:18px;font-size:12.5px;line-height:1.6}.ra-estado-lista strong{color:var(--text-secondary)}.ra-estado-error{color:var(--accent-red)}.ra-question-head,.ra-exam-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:12px;display:flex}.ra-tags{flex-wrap:wrap;align-items:center;gap:10px;display:inline-flex}.ra-tema-tag{color:var(--text-muted);border:1px solid var(--border);border-radius:5px;padding:1px 7px;font-size:11px}.ra-mastery-tag{text-transform:uppercase;letter-spacing:.5px;align-items:center;gap:6px;font-size:11px;font-weight:600;display:inline-flex}.ra-prompt{color:var(--text-primary);margin-bottom:18px;font-size:1.1rem;font-weight:600;line-height:1.45}.ra-multi-aviso{color:var(--accent-orange);align-items:center;gap:7px;margin:-10px 0 16px;font-size:12.5px;display:flex}.ra-reloj{font-variant-numeric:tabular-nums;color:var(--text-muted);align-items:center;gap:6px;font-size:13px;display:inline-flex}.ra-options{gap:12px;display:grid}.ra-option{background:var(--bg-tertiary);border:2px solid var(--border);text-align:left;color:var(--text-primary);border-radius:10px;align-items:center;gap:12px;padding:13px 16px;font-family:inherit;font-size:14px;transition:border-color .15s,background .15s,transform .15s;display:flex}button.ra-option{cursor:pointer}button.ra-option:hover:not(:disabled){border-color:var(--accent-blue);transform:translateY(-1px)}button.ra-option:disabled{cursor:default}.ra-option-letter{background:var(--border);width:30px;height:30px;color:var(--text-primary);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.ra-option-text{flex:1;line-height:1.45}.ra-option-icon{margin-left:auto;font-size:18px}.ra-option--sel{border-color:var(--accent-blue);background:#88c0d01a}.ra-option--sel .ra-option-letter{background:var(--accent-blue);color:var(--bg-primary)}.ra-option--correct{border-color:var(--accent-green);background:#a3be8c1a}.ra-option--correct .ra-option-letter{background:var(--accent-green);color:var(--bg-primary)}.ra-option--correct .ra-option-icon{color:var(--accent-green)}.ra-option--wrong{border-color:var(--accent-red);background:#bf616a1a}.ra-option--wrong .ra-option-letter{background:var(--accent-red);color:var(--bg-primary)}.ra-option--wrong .ra-option-icon{color:var(--accent-red)}.ra-option--dim{opacity:.45}.ra-feedback{border-radius:10px;align-items:center;gap:8px;margin-top:18px;padding:12px 16px;font-size:14.5px;font-weight:600;display:flex}.ra-feedback--correct{border:1px solid var(--accent-green);color:var(--accent-green);background:#a3be8c1f}.ra-feedback--wrong{border:1px solid var(--accent-red);color:var(--accent-red);background:#bf616a1f}.ra-info{background:var(--bg-tertiary);border:1px solid var(--border-sub);border-radius:10px;margin-top:14px;padding:14px 18px}.ra-info-label{text-transform:uppercase;letter-spacing:.6px;color:var(--text-muted);margin-bottom:4px;font-size:10.5px;font-weight:600;display:block}.ra-info-list{color:var(--text-secondary);margin:0;padding-left:18px;font-size:13.5px;line-height:1.6}.ra-info-nota{color:var(--text-secondary);margin-top:10px;font-size:13px;line-height:1.6}.ra-info-nota 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