.boundary-lesson{--boundary-ink:#0a234f;--boundary-blue:#2f9ae6;--boundary-blue-dark:#1479d4;--boundary-pale:#eef8ff;--boundary-line:#d6e4ef;min-height:100dvh;color:var(--boundary-ink);background:#f7fbfd;grid-template-columns:18.5rem minmax(0,1fr);display:grid}.boundary-ladder{border-right:1px solid var(--boundary-line);background:#fff;align-self:start;height:100dvh;padding:1.25rem 1rem;position:sticky;top:0;overflow-y:auto}.boundary-exit,.boundary-mobile-head button{color:#587086;cursor:pointer;background:0 0;border:0;align-items:center;gap:.4rem;padding:.45rem .35rem;font-size:.78rem;font-weight:750;display:inline-flex}.boundary-exit:hover,.boundary-mobile-head button:hover{color:var(--boundary-blue-dark)}.boundary-ladder-title{background:linear-gradient(145deg,#eaf7ff,#f7fbff);border:1px solid #cce8f7;border-radius:14px;margin:1.2rem 0 1.15rem;padding:1.1rem}.boundary-ladder-title span,.boundary-ladder-title strong,.boundary-ladder-title small{display:block}.boundary-ladder-title 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b{color:var(--boundary-ink)}.boundary-mini-rule strong{color:#28754d;background:#dff3e7;border-radius:7px;padding:.25rem .55rem}.boundary-activity-card{border:1px solid var(--boundary-line);background:#fff;border-radius:18px;padding:clamp(1.25rem,3.5vw,2.2rem);box-shadow:0 12px 30px #0a234f12}.boundary-activity-card h2{color:var(--boundary-ink);letter-spacing:-.02em;margin:.45rem 0 0;font-size:clamp(1.15rem,2.4vw,1.55rem);font-weight:800;line-height:1.35}.boundary-activity-card blockquote{color:var(--boundary-ink);background:#f3faff;border:0;border-left:4px solid #78c7eb;border-radius:0 11px 11px 0;margin:1.35rem 0;padding:1rem 1.1rem;font-size:clamp(1rem,2.2vw,1.24rem);font-weight:650;line-height:1.65}.boundary-choice-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.7rem;display:grid}.boundary-choice{color:#345166;text-align:left;cursor:pointer;background:#fff;border:2px solid 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p{margin-top:.28rem;font-size:.8rem;line-height:1.55}.boundary-feedback.is-correct{color:#245e3f;background:#edf8f1;border-color:#a9d5bb}.boundary-feedback.is-try-again{color:#76522c;background:#fff7ec;border-color:#edc8a3}.boundary-next,.boundary-retry{cursor:pointer;border-radius:9px;justify-content:center;align-items:center;gap:.5rem;min-height:2.85rem;margin:1.1rem 0 0 auto;padding:.65rem 1.05rem;font-weight:800;display:flex}.boundary-next{border:2px solid var(--button-primary-border);background:var(--button-primary-bg);color:#fff;box-shadow:0 3px 0 var(--button-primary-shadow)}.boundary-next:hover:not(:disabled){background:var(--button-primary-hover);transform:translateY(-1px)}.boundary-next:disabled{opacity:.45;cursor:not-allowed;box-shadow:none}.boundary-retry{color:var(--boundary-blue-dark);background:#fff;border:2px solid #d5e1e9}.boundary-split-sentence{grid-template-columns:minmax(0,1fr) auto minmax(0,1fr);align-items:stretch;gap:.75rem;margin:1.2rem 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span{color:var(--boundary-blue-dark);letter-spacing:.07em;text-transform:uppercase;font-size:.65rem;font-weight:850}.boundary-formulas strong{color:var(--boundary-ink);font-size:.94rem}.boundary-formulas small{color:#718698;grid-column:2;margin-top:-.55rem;font-size:.68rem}.boundary-guided-dots{gap:.35rem;margin-bottom:1.2rem;display:flex}.boundary-guided-dots span{background:#dce7ee;border-radius:999px;width:1.8rem;height:.3rem}.boundary-guided-dots span.is-on{background:var(--boundary-blue)}.boundary-mobile-head{display:none}@media (width<=900px){.boundary-lesson{display:block}.boundary-ladder{border-right:0;border-bottom:1px solid var(--boundary-line);width:100%;height:auto;padding:1rem;position:static;overflow:visible}.boundary-exit,.boundary-ladder-title small,.boundary-ladder li button small{display:none}.boundary-ladder-title{background:0 0;border:0;margin:0 0 .75rem;padding:0}.boundary-ladder 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var(--button-primary-shadow);transform:translateY(2px)}.punct-primary:disabled{opacity:.48;cursor:not-allowed;box-shadow:none}.punct-secondary{border-color:var(--button-secondary-border);background:var(--button-secondary-bg);color:var(--button-secondary-fg);box-shadow:0 3px 0 var(--button-secondary-shadow)}.punct-secondary:hover{background:var(--button-secondary-hover)}.punct-progress-card{padding:1.4rem}.punct-progress-head{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.punct-progress-head span,.punct-progress-head strong{display:block}.punct-progress-head span{color:var(--muted-soft);font-size:.75rem;font-weight:700}.punct-progress-head strong{color:var(--text);margin-top:.2rem;font-size:1rem}.punct-progress-head .punct-progress-count{color:var(--button-primary-hover);font-size:1.55rem;font-weight:800}.punct-progress-bar,.punct-runner-progress{background:var(--grey-bg);border-radius:999px;height:.55rem;overflow:hidden}.punct-progress-bar{margin:1.1rem 0 1.25rem}.punct-progress-bar span,.punct-runner-progress span{border-radius:inherit;background:var(--button-primary-bg);height:100%;transition:width .22s;display:block}.punct-progress-card dl{margin:0}.punct-progress-card dl>div{border-top:1px solid var(--card-border);justify-content:space-between;gap:1rem;padding:.72rem 0;font-size:.85rem;display:flex}.punct-progress-card dt{color:var(--muted-soft)}.punct-progress-card dd{color:var(--text);margin:0;font-weight:750}.punct-progress-card>p{background:var(--qb-accent-soft);color:var(--muted);border-radius:10px;margin:1rem 0 0;padding:.85rem;font-size:.78rem;line-height:1.55}.punct-map{max-width:76rem;margin:0 auto;padding:1.25rem 1.5rem}.punct-section-heading{justify-content:space-between;align-items:flex-end;gap:2rem;margin-bottom:1rem;display:flex}.punct-section-heading h2{color:var(--text);letter-spacing:-.02em;margin:0;font-size:1.55rem;font-weight:800}.punct-section-heading>p{max-width:30rem;color:var(--muted-soft);text-align:right;margin:0;font-size:.85rem;line-height:1.55}.punct-skill-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:.9rem;display:grid}.punct-skill-card{border:2px solid var(--card-border);background:var(--surface);min-width:0;min-height:8.2rem;color:var(--text);text-align:left;cursor:pointer;border-radius:15px;grid-template-columns:3rem minmax(0,1fr) auto;align-items:center;gap:.9rem;padding:1.15rem;transition:border-color .15s,box-shadow .15s,transform .15s;display:grid;position:relative}.punct-skill-card:hover{border-color:var(--primary-light);transform:translateY(-1px);box-shadow:0 8px 18px #0a234f14}.punct-skill-card.is-recommended{border-color:var(--primary-light);background:linear-gradient(135deg, var(--surface), #eef9ff)}.punct-skill-order{color:var(--muted-soft);font-size:.68rem;font-weight:800;position:absolute;top:.8rem;right:.9rem}.punct-skill-mark,.punct-report-mark,.punct-lesson-mark{background:var(--qb-accent-soft);min-width:0;color:var(--button-primary-hover);text-align:center;border-radius:10px;justify-content:center;align-items:center;font-size:.92rem;font-weight:800;line-height:1.15;display:inline-flex;overflow:hidden}.punct-skill-mark{white-space:normal;width:3rem;height:3rem;padding:.25rem}.punct-skill-copy{min-width:0;padding-right:.4rem}.punct-skill-copy strong,.punct-skill-copy small{display:block}.punct-skill-copy strong{color:var(--text);font-size:1rem;font-weight:800}.punct-skill-copy small{max-width:29rem;color:var(--muted-soft);margin-top:.25rem;font-size:.76rem;line-height:1.45}.punct-level{letter-spacing:.03em;text-transform:uppercase;white-space:nowrap;border:1px solid;border-radius:999px;justify-content:center;min-width:5.5rem;padding:.32rem .55rem;font-size:.62rem;font-weight:800;display:inline-flex}.punct-level.ready{color:var(--success);background:var(--success-soft)}.punct-level.practice{color:var(--warn);background:var(--warn-soft)}.punct-recommended{background:var(--button-primary-bg);color:var(--white);letter-spacing:.05em;text-transform:uppercase;border-radius:999px;padding:.18rem .55rem;font-size:.58rem;font-weight:800;position:absolute;top:-.55rem;left:1rem}.punct-runner{background:var(--qb-bg);padding-bottom:4rem}.punct-runner-header{z-index:4;border-bottom:2px solid var(--card-border);backdrop-filter:blur(10px);background:#c8e7f6f5;grid-template-columns:7rem minmax(10rem,34rem) 7rem;justify-content:center;align-items:center;gap:1.2rem;min-height:4.25rem;padding:.7rem 1.25rem;display:grid;position:sticky;top:0}.punct-runner-header>span{color:var(--muted);text-align:right;font-size:.75rem;font-weight:800}.punct-back,.punct-text-button,.punct-hint-button{color:var(--muted);cursor:pointer;background:0 0;border:0;align-items:center;gap:.4rem;padding:0;font-weight:750;display:inline-flex}.punct-back:hover,.punct-text-button:hover,.punct-hint-button:hover{color:var(--button-primary-hover)}.punct-runner-body{width:min(47rem,100% - 2rem);margin:0 auto;padding-top:clamp(1.5rem,4vw,3rem)}.punct-diagnostic-note,.punct-practice-label{color:var(--muted-soft);justify-content:space-between;gap:1rem;margin-bottom:.75rem;font-size:.76rem;font-weight:650;display:flex}.punct-diagnostic-note span,.punct-practice-label span{color:var(--muted);font-weight:800}.punct-question{border:2px solid var(--card-border);border-radius:var(--radius-md);background:var(--surface);padding:clamp(1.3rem,4vw,2.4rem);box-shadow:0 10px 22px #0a234f12}.punct-question h2{max-width:39rem;color:var(--muted);margin:0;font-size:.9rem;font-weight:650;line-height:1.6}.punct-sentence{color:var(--text);margin:1.7rem 0;font-size:clamp(1.15rem,2.7vw,1.55rem);font-weight:700;line-height:1.65}.punct-choices{gap:.65rem;display:grid}.punct-choice{border:2px solid var(--card-border);background:var(--white);min-height:3.5rem;color:var(--text);text-align:left;cursor:pointer;border-radius:10px;grid-template-columns:2rem 1fr auto;align-items:center;gap:.75rem;padding:.65rem .85rem;font-weight:700;transition:border-color .12s,background .12s,transform .12s;display:grid}.punct-choice:hover:not(:disabled){border-color:var(--primary-light);transform:translate(2px)}.punct-choice.is-selected{border-color:var(--button-primary-bg);background:var(--qb-accent-soft)}.punct-choice.is-correct{border-color:var(--success);background:var(--success-soft);color:#235f45}.punct-choice.is-wrong{border-color:var(--danger);background:var(--danger-soft);color:#8a2b36}.punct-choice-letter{border:1px solid;border-radius:50%;justify-content:center;align-items:center;width:2rem;height:2rem;font-size:.78rem;font-weight:800;display:inline-flex}.punct-hint,.punct-feedback{border:1px solid var(--primary-light);background:var(--qb-accent-soft);color:var(--muted);border-radius:10px;margin-top:1rem;padding:.95rem 1rem}.punct-hint span,.punct-trap span{color:var(--muted);letter-spacing:.05em;text-transform:uppercase;margin-bottom:.2rem;font-size:.65rem;font-weight:800;display:block}.punct-hint p,.punct-feedback p{margin:0;line-height:1.6}.punct-feedback>strong{color:inherit;margin-bottom:.25rem;font-size:1rem;font-weight:800;display:block}.punct-feedback.is-correct{border-color:var(--success);background:var(--success-soft)}.punct-feedback.is-wrong{border-color:var(--danger);background:var(--danger-soft)}.punct-trap{border-top:1px solid #0a234f21;margin-top:.75rem;padding-top:.7rem;font-size:.8rem}.punct-next{margin:1.35rem 0 0 auto}.punct-runner-actions{justify-content:space-between;align-items:center;gap:1rem;display:flex}.punct-hint-button{text-underline-offset:.2rem;margin-top:1.35rem;text-decoration:underline}.punct-lesson{background:var(--qb-bg);padding:1.5rem 1.5rem 4rem}.punct-lesson>.punct-back,.punct-lesson-head,.punct-lesson-grid,.punct-lesson-cta{max-width:68rem;margin-left:auto;margin-right:auto}.punct-lesson>.punct-back{width:100%;margin-bottom:1.4rem;display:flex}.punct-lesson-head{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:.7rem 1rem;margin-bottom:1rem;display:grid}.punct-lesson-head>p{max-width:44rem;color:var(--muted-soft);grid-column:1/-1;margin:0;line-height:1.6}.punct-lesson-head>div>p{color:var(--muted);text-transform:uppercase;margin:0 0 .25rem;font-size:.72rem;font-weight:800}.punct-lesson-head 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0;font-size:.9rem;line-height:1.55;display:grid}.punct-rule-card li:before{content:counter(process);background:var(--qb-accent-soft);width:1.45rem;height:1.45rem;color:var(--button-primary-hover);border-radius:50%;justify-content:center;align-items:center;font-size:.72rem;font-weight:800;display:inline-flex}.punct-example{border:1px solid var(--card-border);color:var(--text);border-radius:10px;padding:1rem;font-size:1rem;font-weight:650;line-height:1.65}.punct-example span{letter-spacing:.06em;text-transform:uppercase;margin-bottom:.35rem;font-size:.64rem;font-weight:800;display:block}.punct-example.is-wrong{background:var(--danger-soft)}.punct-example.is-wrong span{color:var(--danger)}.punct-example.is-right{background:var(--success-soft);border-color:#87ad96}.punct-example.is-right span{color:var(--success)}.punct-example-arrow{color:var(--muted-soft);text-align:center;padding:.25rem 0;font-size:1.2rem}.punct-worked-card>p:last-child{color:var(--muted);margin:1rem 0 0;font-size:.9rem;line-height:1.65}.punct-lesson-cta{width:fit-content;margin-top:1.25rem;margin-left:auto;margin-right:max(50% - 34rem,0px);display:flex}.punct-report{background:var(--qb-bg);grid-template-columns:minmax(19rem,.75fr) minmax(25rem,1.25fr);gap:1rem;max-width:72rem;margin:0 auto;padding:2rem 1.5rem 4rem;display:grid}.punct-report-intro,.punct-report-skills{border:2px solid var(--card-border);border-radius:var(--radius-md);background:var(--surface);box-shadow:0 8px 18px #0a234f0f}.punct-report-intro{align-self:start;padding:1.6rem}.punct-report-intro h1{font-size:clamp(1.8rem,4vw,2.5rem)}.punct-report-intro>p:not(.punct-kicker){color:var(--muted);font-size:.9rem;line-height:1.65}.punct-report-intro .punct-primary{margin-top:.7rem}.punct-report-intro .punct-text-button{margin-top:1rem;display:flex}.punct-score-ring{border:8px solid var(--brand-sky);background:var(--qb-accent-soft);border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:7rem;height:7rem;margin:1.25rem 0;display:flex}.punct-score-ring strong{color:var(--text);font-size:2.2rem;font-weight:800;line-height:1}.punct-score-ring span{color:var(--muted);text-transform:uppercase;font-size:.68rem;font-weight:800}.punct-report-skills{padding:.6rem 1.25rem}.punct-report-skills>button{border:0;border-bottom:1px solid var(--card-border);width:100%;color:var(--text);text-align:left;cursor:pointer;background:0 0;grid-template-columns:3rem 1fr auto;align-items:center;gap:.9rem;padding:.9rem 0;display:grid}.punct-report-skills>button:last-child{border-bottom:0}.punct-report-skills>button:hover strong{color:var(--button-primary-hover)}.punct-report-mark{width:3rem;height:3rem;padding:.3rem;color:var(--button-primary-hover)!important}.punct-report-skills strong,.punct-report-skills small{display:block}.punct-report-skills strong{color:var(--text);font-size:.95rem;font-weight:800}.punct-report-skills small{color:var(--muted-soft);margin-top:.1rem;font-size:.75rem}.punct-complete{background:var(--qb-bg);text-align:center;flex-direction:column;justify-content:center;align-items:center;padding:3rem 1.5rem;display:flex}.punct-complete-mark{border:2px solid var(--primary-light);background:var(--surface);width:5rem;height:5rem;color:var(--button-primary-bg);box-shadow:0 4px 0 var(--frame-shadow);border-radius:50%;justify-content:center;align-items:center;margin-bottom:1.3rem;font-size:1.2rem;font-weight:800;display:flex}.punct-complete h1{max-width:42rem;font-size:clamp(2rem,5vw,3rem)}.punct-complete>p:not(.punct-kicker){max-width:35rem;color:var(--muted);line-height:1.7}.punct-complete-actions{flex-direction:column;align-items:center;gap:.8rem;margin-top:1.2rem;display:flex}@media (width<=980px){.punct-hero,.punct-report{grid-template-columns:1fr}.punct-progress-card{max-width:none}}@media (width<=760px){.punct-hero,.punct-map,.punct-lesson,.punct-report{padding-left:1rem;padding-right:1rem}.punct-skill-grid,.punct-lesson-grid{grid-template-columns:1fr}.punct-section-heading{display:block}.punct-section-heading>p{text-align:left;margin-top:.35rem}.punct-runner-header{grid-template-columns:auto 1fr auto;gap:.75rem;padding-inline:1rem}}@media (width<=520px){.punct-hero-copy{min-height:auto;padding:1.4rem}.punct-skill-card{grid-template-columns:2.6rem minmax(0,1fr);min-height:0;padding:1rem}.punct-skill-mark{width:2.6rem;height:2.6rem;font-size:.76rem}.punct-skill-card .punct-level{grid-column:2;justify-self:start}.punct-diagnostic-note,.punct-practice-label{display:block}.punct-diagnostic-note span,.punct-practice-label span{margin-bottom:.15rem;display:block}.punct-runner-actions{align-items:flex-end}.punct-report-skills>button{grid-template-columns:2.7rem 1fr}.punct-report-mark{width:2.7rem;height:2.7rem}.punct-report-skills .punct-level{grid-column:2;justify-self:start}}@media (prefers-reduced-motion:reduce){.punct-primary,.punct-skill-card,.punct-choice,.punct-progress-bar span,.punct-runner-progress span{transition:none}}