/* Laboratorio de matrices y sistemas · estilos propios */
.lm{--lm-ink:#eaf2ff;--lm-muted:#9aaac4;--lm-card:rgba(14,21,40,.72);--lm-card2:rgba(255,255,255,.045);--lm-line:rgba(130,190,255,.2);--lm-acc:#8b6bff;--lm-acc2:#5ef2e0;--lm-warn:#f5c04a;--lm-ok:#4ade80;--lm-bad:#fb7185;--lm-paper:#0b1020;
  color:var(--lm-ink);max-width:1120px;margin:0 auto;padding:8px 0 56px;font-family:var(--bf-font-body,'Inter',system-ui,sans-serif)}
html.theme-light .lm,body[data-theme="light"] .lm{--lm-ink:#101828;--lm-muted:#51607a;--lm-card:rgba(255,255,255,.9);--lm-card2:rgba(30,40,80,.045);--lm-line:rgba(30,40,80,.16);--lm-acc:#6d4df2;--lm-acc2:#0f9d8a;--lm-warn:#b7791f;--lm-ok:#15803d;--lm-bad:#be123c;--lm-paper:#fff}
.lm *{box-sizing:border-box}
.lm h1,.lm h2,.lm h3{font-family:var(--bf-font-display,'Space Grotesk','Inter',sans-serif);letter-spacing:-.02em;line-height:1.15;margin:0}
.lm h1{font-size:clamp(2rem,5vw,3rem);margin:0 0 10px}
.lm h2{font-size:1.3rem;margin:0 0 14px}
.lm-eyebrow{margin:0 0 10px;font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--lm-acc2)}
.lm-lede{max-width:72ch;color:var(--lm-muted);font-size:1.02rem;line-height:1.6;margin:0 0 18px}

.lm-scope-wrap{margin:0 0 26px}
.lm-scope-toggle{display:flex;gap:8px;align-items:center;padding:6px 8px 6px 0;font-size:.82rem;font-weight:700;color:var(--lm-muted);border-radius:8px;cursor:pointer;list-style:none;-webkit-user-select:none;user-select:none}
.lm-scope-toggle::-webkit-details-marker,.lm-scope-toggle::marker{display:none}
.lm-scope-toggle:hover{color:var(--lm-ink)}
.lm-arr{display:inline-block;font-size:.75rem;transition:transform .15s}
details.lm-scope-wrap[open] .lm-arr{transform:rotate(90deg)}
.lm-scope{border:1px solid var(--lm-line);border-radius:14px;padding:14px 16px;background:var(--lm-card2);font-size:.88rem;color:var(--lm-muted);line-height:1.6;margin-top:6px}
.lm-scope p{margin:0 0 8px}
.lm-scope p:last-child{margin-bottom:0}
.lm-scope strong{color:var(--lm-ink)}

.lm-btn{border:0;border-radius:999px;padding:11px 22px;font:inherit;font-weight:700;font-size:.92rem;cursor:pointer;background:linear-gradient(135deg,var(--lm-acc),var(--lm-acc2));color:#fff;box-shadow:0 4px 16px rgba(139,107,255,.28);transition:transform .15s,box-shadow .15s}
.lm-btn:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(139,107,255,.4)}
.lm-btn--ghost{background:transparent;color:var(--lm-ink);border:1px solid var(--lm-line);box-shadow:none}
.lm-btn--ghost:hover{border-color:var(--lm-acc);background:rgba(139,107,255,.06);box-shadow:none}
.lm-btn--sm{padding:7px 14px;font-size:.8rem}
.lm-btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.lm-btn:focus-visible,.lm-select:focus-visible,.lm-input:focus-visible,.lm-chip:focus-visible,.lm-mc-opt:focus-visible,.lm-cell:focus-visible{outline:3px solid var(--lm-acc2);outline-offset:2px}

.lm-view[hidden]{display:none}

.lm-modes{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;margin-bottom:24px}
.lm-mode-card{display:flex;flex-direction:column;gap:8px;padding:26px 24px;border:1px solid var(--lm-line);border-radius:18px;background:var(--lm-card);backdrop-filter:blur(8px);cursor:pointer;transition:border-color .2s,transform .15s,box-shadow .2s}
.lm-mode-card:hover,.lm-mode-card:focus-visible{border-color:var(--lm-acc);transform:translateY(-3px);box-shadow:0 8px 28px rgba(139,107,255,.22)}
.lm-mode-card:focus-visible{outline:3px solid var(--lm-acc2);outline-offset:2px}
.lm-mode-icon{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,rgba(139,107,255,.18),rgba(6,182,212,.12));font-size:1.4rem;line-height:1;margin-bottom:4px}
.lm-mode-badge{display:inline-block;font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--lm-acc2);margin-bottom:2px}
.lm-mode-card h2{font-size:1.2rem;margin:0}
.lm-mode-card p{margin:0;color:var(--lm-muted);font-size:.92rem;line-height:1.55;flex:1}
.lm-mode-cta{font-weight:700;font-size:.88rem;color:var(--lm-acc);margin-top:4px;display:inline-block}
.lm-progress-summary{border:1px dashed var(--lm-line);border-radius:14px;padding:16px 18px;font-size:.87rem;color:var(--lm-muted);line-height:1.6}
.lm-progress-summary:empty{display:none}
.lm-progress-summary strong{color:var(--lm-ink)}
.lm-mode-card--static{cursor:default}
.lm-mode-card--static:hover,.lm-mode-card--static:focus-visible{transform:none;box-shadow:none;border-color:var(--lm-line)}

.lm-field{margin-bottom:16px}
.lm-field-label{display:block;font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--lm-muted);margin-bottom:8px}
.lm-field-row{display:flex;flex-wrap:wrap;gap:16px}
.lm-field-row .lm-field{min-width:180px;flex:1}
.lm-select,.lm-input{width:100%;border-radius:12px;border:1px solid var(--lm-line);background:var(--lm-paper);color:var(--lm-ink);font:inherit;font-size:.95rem;padding:10px 14px}
.lm-blocks{display:flex;flex-wrap:wrap;gap:8px}
.lm-chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--lm-line);background:transparent;color:var(--lm-ink);border-radius:999px;padding:8px 15px;font:inherit;font-size:.86rem;cursor:pointer;transition:border-color .15s,background .15s}
.lm-chip[aria-pressed="true"]{border-color:var(--lm-acc);background:rgba(139,107,255,.14);color:var(--lm-ink);font-weight:700}

.lm-ex-layout{display:grid;grid-template-columns:1fr;gap:22px}
.lm-ex-head{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:14px}
.lm-block-badge{font-size:.72rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;padding:4px 11px;border-radius:999px;border:1px solid var(--lm-acc);color:var(--lm-acc2)}
.lm-ex-progress{font-size:.84rem;color:var(--lm-muted)}
.lm-ex-bar-wrap{width:100%;height:4px;border-radius:2px;background:var(--lm-line);overflow:hidden;margin-bottom:10px}
.lm-ex-bar{height:100%;border-radius:2px;background:linear-gradient(90deg,var(--lm-acc),var(--lm-acc2));transition:width .3s}
.lm-ex-timer{margin-left:auto;font-family:var(--bf-font-mono,monospace);font-size:.95rem;font-weight:700;color:var(--lm-warn);padding:4px 10px;border-radius:8px;border:1px solid var(--lm-warn)}
.lm-ex-timer.is-low{color:var(--lm-bad);border-color:var(--lm-bad)}

.lm-statement{background:var(--lm-card);border:1px solid var(--lm-line);border-radius:16px;padding:18px 20px;font-size:1.05rem;line-height:1.6;margin-bottom:16px}

/* ---------- Matrices (lectura y edición) ---------- */
.lm-mats{display:flex;flex-wrap:wrap;gap:22px;align-items:center;margin-top:12px}
.lm-mat-block{display:flex;flex-direction:column;align-items:center;gap:6px}
.lm-mat-block__label{font-family:var(--bf-font-mono,monospace);font-size:.82rem;color:var(--lm-acc2);font-weight:700}
.lm-mat{display:inline-flex;align-items:stretch;position:relative;padding:0 10px}
.lm-mat::before,.lm-mat::after{content:'';position:absolute;top:0;bottom:0;width:8px;border:2px solid var(--lm-ink);opacity:.8}
.lm-mat::before{left:0;border-right:none}
.lm-mat::after{right:0;border-left:none}
.lm-mat-grid{display:grid;gap:4px 14px;padding:8px 4px}
.lm-mat-cell{display:flex;align-items:center;justify-content:center;min-width:34px;font-family:var(--bf-font-mono,monospace);font-size:.98rem;color:var(--lm-ink)}
.lm-mat-cell.is-param{color:var(--lm-acc2);font-weight:800}
.lm-mat-sep{width:1px;background:var(--lm-line);margin:4px 2px}
.lm-mat-rhs{display:flex;flex-direction:column;gap:4px;justify-content:center;padding:8px 2px}

/* Cuadrícula editable para respuestas matriciales */
.lm-grid-input{display:inline-flex;align-items:stretch;position:relative;padding:0 10px;margin:4px 0}
.lm-grid-input::before,.lm-grid-input::after{content:'';position:absolute;top:0;bottom:0;width:8px;border:2px solid var(--lm-acc);opacity:.85}
.lm-grid-input::before{left:0;border-right:none}
.lm-grid-input::after{right:0;border-left:none}
.lm-grid-input__grid{display:grid;gap:6px;padding:10px 4px}
.lm-cell{width:58px;text-align:center;border-radius:8px;border:1px solid var(--lm-line);background:var(--lm-paper);color:var(--lm-ink);font:600 .95rem/1.2 var(--bf-font-mono,monospace);padding:7px 4px}
.lm-cell:focus{border-color:var(--lm-acc);outline:none}
.lm-cell.is-correct{border-color:var(--lm-ok);background:rgba(74,222,128,.12)}
.lm-cell.is-wrong{border-color:var(--lm-bad);background:rgba(251,113,133,.12)}

.lm-vector-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.lm-vector-row label{display:flex;flex-direction:column;gap:5px;font-size:.84rem;color:var(--lm-muted)}

.lm-input-area{margin-bottom:14px}
.lm-mc-list{display:grid;gap:8px}
.lm-mc-opt{display:block;width:100%;text-align:left;padding:12px 16px;border:1px solid var(--lm-line);border-radius:12px;background:var(--lm-card2);color:var(--lm-ink);font:inherit;font-size:.92rem;cursor:pointer;transition:border-color .15s,background .15s}
.lm-mc-opt:hover{border-color:var(--lm-acc)}
.lm-mc-opt[aria-pressed="true"]{border-color:var(--lm-acc);background:rgba(139,107,255,.14);font-weight:700}
.lm-mc-opt.is-correct{border-color:var(--lm-ok);background:rgba(74,222,128,.12)}
.lm-mc-opt.is-wrong{border-color:var(--lm-bad);background:rgba(251,113,133,.12)}
.lm-mc-opt:disabled{cursor:default;opacity:.85}

.lm-text-input{border-radius:10px;border:1px solid var(--lm-line);background:var(--lm-paper);color:var(--lm-ink);font:inherit;font-size:1rem;padding:9px 13px;min-width:160px}
.lm-text-input:focus{border-color:var(--lm-acc);outline:none}
.lm-text-input.is-correct{border-color:var(--lm-ok)}
.lm-text-input.is-wrong{border-color:var(--lm-bad)}

.lm-actions{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.lm-feedback{font-size:.95rem;min-height:1.3em;margin:4px 0 10px;font-weight:700}
.lm-feedback.is-ok{color:var(--lm-ok)}
.lm-feedback.is-bad{color:var(--lm-bad)}
.lm-feedback.is-info{color:var(--lm-muted);font-weight:500}

.lm-hints{display:grid;gap:8px;margin-bottom:10px}
.lm-hint-box{border-left:3px solid var(--lm-warn);background:var(--lm-card2);border-radius:0 10px 10px 0;padding:10px 14px;font-size:.88rem;color:var(--lm-ink);line-height:1.5}
.lm-hint-box b{color:var(--lm-warn)}

.lm-solution-box{border:1px solid var(--lm-acc);border-radius:14px;padding:16px 18px;background:rgba(139,107,255,.08);margin-top:6px}
.lm-solution-box[hidden]{display:none}
.lm-solution-box h3{font-size:.85rem;text-transform:uppercase;letter-spacing:.08em;color:var(--lm-acc2);margin-bottom:10px}
.lm-sol-step{margin:0 0 12px;font-size:.92rem;line-height:1.55;color:var(--lm-ink)}
.lm-sol-step:last-child{margin-bottom:0}

.lm-score-mini{margin-top:14px;padding:12px 14px;border:1px dashed var(--lm-line);border-radius:12px;font-size:.84rem;color:var(--lm-muted);line-height:1.6}
.lm-score-mini strong{color:var(--lm-ink)}

/* Gráfica de rectas (sistemas 2x2) */
.lm-canvas-wrap{border:1px solid var(--lm-line);border-radius:16px;overflow:hidden;background:var(--lm-paper);max-width:360px;margin:14px 0}
.lm-canvas-wrap canvas{display:block;width:100%;height:auto}
.lm-canvas-caption{font-size:.78rem;color:var(--lm-muted);text-align:center;padding:6px 0 10px}

#lm-summary-body{display:grid;gap:14px;margin-bottom:18px}
.lm-sum-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:12px}
.lm-sum-tile{border:1px solid var(--lm-line);border-radius:14px;padding:14px 16px;background:var(--lm-card)}
.lm-sum-tile strong{display:block;font-size:1.6rem;font-family:var(--bf-font-mono,monospace);color:var(--lm-acc2)}
.lm-sum-tile span{font-size:.76rem;color:var(--lm-muted);text-transform:uppercase;letter-spacing:.06em}
.lm-sum-block-row{display:flex;align-items:center;gap:10px;font-size:.88rem;padding:8px 0;border-bottom:1px solid var(--lm-line)}
.lm-sum-block-row .lm-bar{flex:1;height:8px;border-radius:5px;background:var(--lm-card2);overflow:hidden}
.lm-sum-block-row .lm-bar > i{display:block;height:100%;background:linear-gradient(90deg,var(--lm-acc),var(--lm-acc2))}
.lm-sum-errors{border:1px solid var(--lm-bad);border-radius:14px;padding:14px 16px;background:rgba(251,113,133,.06)}
.lm-sum-errors h3{font-size:.85rem;color:var(--lm-bad);margin:0 0 10px;text-transform:uppercase;letter-spacing:.06em}
.lm-sum-errors ul{margin:0;padding-left:18px;display:grid;gap:6px;font-size:.86rem;color:var(--lm-ink)}

/* Gauss interactivo */
.lm-gl-panel{margin-top:16px;padding:18px 20px;border:1px solid var(--lm-acc);border-radius:16px;background:rgba(139,107,255,.06)}
.lm-gl-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}
.lm-gl-head h3{font-size:.95rem}
.lm-gl-desc{margin:0 0 12px;font-size:.86rem;color:var(--lm-muted);line-height:1.5}
.lm-gl-matrix{display:flex;align-items:center;gap:8px;margin-bottom:14px;overflow-x:auto;padding-bottom:4px}
.lm-gl-rowlabels{display:flex;flex-direction:column;justify-content:space-around;font-family:var(--bf-font-mono,monospace);font-size:.8rem;color:var(--lm-acc2);font-weight:700;align-self:stretch}
.lm-mat-cell--sep{border-left:1px dashed var(--lm-line);padding-left:10px;margin-left:4px}
.lm-gl-controls{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:10px}
.lm-gl-fields{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:.88rem}
.lm-gl-goals{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.lm-gl-feedback{font-size:.87rem;min-height:1.2em;margin:6px 0;font-weight:600}
.lm-gl-feedback.is-ok{color:var(--lm-ok)}
.lm-gl-feedback.is-bad{color:var(--lm-bad)}
.lm-gl-feedback.is-info{color:var(--lm-muted);font-weight:500}
.lm-gl-backsub{margin-top:12px;padding-top:12px;border-top:1px dashed var(--lm-line)}
.lm-gl-backsub[hidden]{display:none}

/* ========== Modo A: Solucionador (.lm-sv-*) ========== */
.lm-sv-section{margin-bottom:20px}
.lm-sv-section[hidden]{display:none}
.lm-sv-section-head{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.lm-sv-step-num{display:flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;background:linear-gradient(135deg,var(--lm-acc),var(--lm-acc2));color:#fff;font-weight:800;font-size:.82rem;flex-shrink:0}
.lm-sv-section-title{font-weight:700;font-size:1rem;color:var(--lm-ink)}
.lm-sv-op-badge{margin-left:auto;font-size:.76rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--lm-acc2);padding:3px 10px;border:1px solid var(--lm-acc2);border-radius:999px}
.lm-sv-desc{color:var(--lm-muted);font-size:.94rem;line-height:1.55;margin-bottom:16px;max-width:72ch}
.lm-sv-inputs{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:14px;margin-bottom:16px}
.lm-sv-mat-panel{border:1px solid var(--lm-line);border-radius:14px;padding:14px 16px;background:var(--lm-card)}
.lm-sv-mat-panel[hidden]{display:none}
.lm-sv-mat-head{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:10px}
.lm-sv-mat-label{font-weight:700;font-size:.88rem;color:var(--lm-acc2);margin-right:auto}
.lm-sv-dim-label{font-size:.78rem;color:var(--lm-muted);display:flex;align-items:center;gap:4px}
.lm-sv-dim{width:56px;padding:4px 6px;font-size:.86rem;border-radius:8px}
.lm-sv-grid{margin:0}
.lm-sv-extra-wrap{border:1px solid var(--lm-line);border-radius:14px;padding:12px 14px;background:var(--lm-card2);display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:10px}
.lm-sv-extra-wrap[hidden]{display:none}
.lm-sv-text-details{border:1px solid var(--lm-line);border-radius:12px;padding:10px 14px;font-size:.88rem;color:var(--lm-muted);margin-bottom:14px}
.lm-sv-text-details summary{cursor:pointer;font-weight:600;color:var(--lm-ink)}
.lm-sv-text-details summary:hover{color:var(--lm-acc)}
.lm-sv-text-wrap{margin-top:10px;display:flex;flex-wrap:wrap;gap:8px;align-items:flex-start}
.lm-sv-text-wrap textarea{flex:1;min-width:200px;resize:vertical;font-family:var(--bf-font-mono,monospace);font-size:.88rem}
.lm-sv-ops{margin-bottom:16px}
.lm-sv-ops h3{font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:var(--lm-muted);margin-bottom:10px}
.lm-sv-op-groups{display:grid;gap:14px}
.lm-sv-op-group{border:1px solid var(--lm-line);border-radius:12px;padding:10px 14px;background:var(--lm-card2)}
.lm-sv-op-group-label{display:block;font-size:.7rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--lm-muted);margin-bottom:8px}
.lm-sv-op-btns{display:flex;flex-wrap:wrap;gap:6px}
.lm-sv-op-btn[aria-pressed="true"]{border-color:var(--lm-acc);background:rgba(139,107,255,.18);font-weight:700}
.lm-sv-error{font-size:.88rem;color:var(--lm-bad);font-weight:600;margin:8px 0}
.lm-sv-error[hidden]{display:none}
.lm-sv-result{border:1px solid var(--lm-acc);border-radius:16px;padding:20px 22px;background:rgba(139,107,255,.06);margin-top:14px}
.lm-sv-result[hidden]{display:none}
.lm-sv-result h3{font-size:.9rem;color:var(--lm-acc2);margin-bottom:14px;font-weight:700}
.lm-sv-step{margin:0 0 18px;font-size:.92rem;line-height:1.55;color:var(--lm-ink);padding:14px 16px;border-radius:10px;border:1px solid var(--lm-line);background:var(--lm-card2)}
.lm-sv-step:last-child{margin-bottom:0}
.lm-sv-step-head{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.lm-sv-step-idx{display:flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:var(--lm-acc);color:#fff;font-weight:800;font-size:.7rem;flex-shrink:0}
.lm-sv-step-title{display:block;font-weight:700;color:var(--lm-acc2);font-size:.82rem;text-transform:uppercase;letter-spacing:.05em;margin-bottom:4px}
.lm-sv-step-head .lm-sv-step-title{margin-bottom:0}
.lm-sv-step-text{display:block;margin-bottom:6px}
.lm-sv-step-result{display:block;margin-top:8px;padding:10px 14px;border-radius:8px;background:linear-gradient(135deg,rgba(139,107,255,.12),rgba(6,182,212,.08));border:1px solid var(--lm-acc);font-weight:700;font-size:.95rem;color:var(--lm-ink)}
.lm-sv-nav{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:16px;padding-top:14px;border-top:1px dashed var(--lm-line)}
.lm-sv-nav[hidden]{display:none}
.lm-sv-step-counter{font-size:.84rem;color:var(--lm-muted);font-weight:600}
.lm-sv-progress{display:flex;gap:5px;align-items:center}
.lm-sv-dot{width:8px;height:8px;border-radius:50%;background:var(--lm-line);transition:background .2s,transform .2s}
.lm-sv-dot--active{background:var(--lm-acc);transform:scale(1.3)}
.lm-sv-dot--done{background:var(--lm-acc2)}
.lm-sv-examples{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:8px;margin-top:8px}
.lm-sv-example-btn{text-align:left;border:1px solid var(--lm-line);border-radius:10px;padding:10px 13px;background:var(--lm-card2);color:var(--lm-ink);font:inherit;font-size:.84rem;cursor:pointer;transition:border-color .15s}
.lm-sv-example-btn:hover{border-color:var(--lm-acc)}
.lm-sv-example-btn strong{display:block;font-size:.78rem;color:var(--lm-acc2)}

/* ========== Modo B: Módulos (.lm-module-*) ========== */
.lm-module-btn{display:flex;flex-direction:column;gap:5px;width:100%;text-align:left;border:1px solid var(--lm-line);border-radius:12px;padding:14px 16px;background:var(--lm-card);color:var(--lm-ink);font:inherit;cursor:pointer;transition:border-color .15s,background .15s,transform .15s}
.lm-module-btn:hover{border-color:var(--lm-acc);background:rgba(139,107,255,.06);transform:translateX(3px)}
.lm-module-btn-top{display:flex;align-items:center;gap:8px}
.lm-module-btn-title{font-weight:700;font-size:.94rem;flex:1}
.lm-module-chevron{font-size:1.2rem;color:var(--lm-muted);transition:color .15s}
.lm-module-btn:hover .lm-module-chevron{color:var(--lm-acc)}
.lm-module-btn-desc{font-size:.8rem;color:var(--lm-muted);line-height:1.4}
.lm-module-btn-stat{font-size:.78rem;color:var(--lm-muted)}
.lm-module-progress{width:100%;height:4px;border-radius:2px;background:var(--lm-line);overflow:hidden;margin-top:2px}
.lm-module-progress-bar{display:block;height:100%;border-radius:2px;background:linear-gradient(90deg,var(--lm-acc),var(--lm-acc2));transition:width .3s}
.lm-module-theory{border:1px solid var(--lm-line);border-radius:14px;padding:18px 20px;background:var(--lm-card);font-size:.93rem;line-height:1.65;color:var(--lm-ink)}
.lm-module-theory h3{font-size:1.05rem;margin-bottom:10px;color:var(--lm-acc2)}
.lm-module-theory p{margin:0 0 10px}
.lm-module-theory p:last-child{margin-bottom:0}
.lm-module-theory ul,.lm-module-theory ol{margin:0 0 10px;padding-left:20px}
.lm-module-theory li{margin-bottom:4px}
.lm-module-theory strong{color:var(--lm-ink)}
.lm-module-theory em{color:var(--lm-acc2)}
.lm-module-theory table{font-size:.86rem;border:1px solid var(--lm-line);border-radius:8px;overflow:hidden}
.lm-module-theory th,.lm-module-theory td{padding:6px 10px;border-bottom:1px solid var(--lm-line)}
.lm-module-theory th{background:var(--lm-card2);color:var(--lm-muted)}

@media (max-width:540px){
  .lm-gl-controls{flex-direction:column;align-items:flex-start}
  .lm-gl-fields{width:100%}
  .lm-modes{grid-template-columns:1fr}
  .lm-field-row{flex-direction:column}
  .lm-actions{gap:8px;flex-wrap:wrap}
  .lm-btn{padding:10px 16px;font-size:.86rem}
  .lm-mats{gap:14px}
  .lm-cell{width:46px;font-size:.85rem}
  .lm-mat-cell{min-width:26px;font-size:.86rem}
  .lm-sv-inputs{grid-template-columns:1fr}
  .lm-sv-examples{grid-template-columns:1fr}
  .lm-sv-nav{gap:6px;flex-wrap:wrap;justify-content:center}
  .lm-sv-section-head{flex-wrap:wrap}
  .lm-sv-op-badge{margin-left:0;margin-top:4px}
  .lm-sv-section{padding:0}
  .lm-sv-result{padding:14px 14px}
  .lm-sv-step{padding:10px 12px}
  .lm-mode-card{padding:20px 18px}
  .lm-module-btn{padding:12px 14px}
}
@media (prefers-reduced-motion:reduce){
  .lm-btn,.lm-mc-opt,.lm-chip,.lm-module-btn,.lm-sv-example-btn{transition:none}
}