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input:checked+.topic-select-check{background:var(--accent);border-color:var(--accent)}.topic-select-option input:checked+.topic-select-check:after{content:"✓";position:absolute;top:0;right:0;bottom:0;left:0;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:700;color:var(--accent-ink)}.topic-select-option input:focus-visible+.topic-select-check{box-shadow:var(--ring)}.topic-select-option-main{display:flex;flex-direction:column;gap:2px;flex:1;min-width:0}.topic-select-option-main>span{display:flex;align-items:center;gap:8px;font-size:13px;text-transform:capitalize}.topic-select-option-main>span svg{color:var(--muted)}.topic-select-option-main small{font-family:var(--mono);font-size:10.5px;color:var(--muted)}.topic-select-option em{font-family:var(--mono);font-size:11px;font-style:normal;color:var(--faint)}.workspace-summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.summary-cell{display:flex;flex-direction:column;gap:5px;padding:13px 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h2{font-family:var(--mono);font-size:15px;font-weight:600;text-transform:capitalize}.problem-topic-heading small{font-family:var(--mono);font-size:11px;color:var(--muted)}.problem-topic-heading>a{display:inline-flex;align-items:center;gap:5px;font-family:var(--mono);font-size:11px;letter-spacing:.03em;color:var(--muted);white-space:nowrap}.problem-topic-heading>a:hover{color:var(--accent)}.problem-list{background:var(--panel);border:1px solid var(--border);border-radius:var(--r);overflow:hidden}.problem-list-head,.problem-row{display:grid;grid-template-columns:18px 44px minmax(0,1fr) 78px 104px 96px;align-items:center;gap:12px;padding:11px 16px}.problem-list-head{font-family:var(--mono);font-size:9.5px;letter-spacing:.11em;text-transform:uppercase;color:var(--muted);background:var(--bg-raised);border-bottom:1px solid var(--border)}.problem-row{color:var(--text);border-bottom:1px solid var(--border);transition:background 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var(--border);border-radius:var(--r-lg)}.timeline-rail-header{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;padding-bottom:14px;border-bottom:1px solid var(--border)}.timeline-rail-header h2{font-family:var(--mono);font-size:13px;font-weight:600;text-transform:capitalize}.timeline-rail-header p{margin-top:4px;font-family:var(--mono);font-size:10.5px;color:var(--muted)}.timeline-rail-header svg{color:var(--accent);flex:none}.timeline-section-stack{display:flex;flex-direction:column;gap:16px}.timeline-section-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px}.timeline-section-heading h3{font-family:var(--mono);font-size:10px;letter-spacing:.12em;text-transform:uppercase;color:var(--muted)}.timeline-section-heading h3:before{content:"▸ ";color:var(--accent)}.timeline-section.is-now .timeline-section-heading h3{color:var(--accent)}.timeline-section-heading 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a:hover{box-shadow:var(--glow-soft)}.external-links a:before{content:"↗";color:var(--accent)}.primer-banner{display:flex;align-items:center;gap:10px;padding:10px 14px;margin-bottom:18px;font-family:var(--sans);font-size:13px;color:var(--text);background:var(--accent-soft);border:1px solid var(--accent-line);border-radius:var(--r-sm);transition:box-shadow .16s}.primer-banner:hover{box-shadow:var(--glow-soft)}.primer-banner>svg:first-child{flex:none;color:var(--accent)}.primer-banner span{flex:1}.primer-banner strong{color:var(--accent)}.primer-banner-chev{flex:none;color:var(--faint)}.structure-notes{display:flex;flex-direction:column;gap:10px;margin-bottom:16px;padding-bottom:14px;border-bottom:1px solid 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var(--border);border-radius:var(--r-sm);padding:9px 11px;display:block;white-space:pre-wrap;word-break:break-word}.example-card pre{margin-top:8px;overflow-x:auto}.example-io span{font-family:var(--sans);font-size:13.5px;color:var(--muted);line-height:1.6}.example-case-name{font-family:var(--mono);font-size:11px;color:var(--muted)}.example-copy{margin-top:12px}.example-copy-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}.example-copy-head strong{font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.example-copy-button{flex:none;width:28px;height:28px;display:inline-grid;place-items:center;color:var(--muted);border:1px solid var(--border);border-radius:var(--r-sm);background:var(--panel-soft);transition:color .14s,border-color .14s,background .14s}.example-copy-button:hover{color:var(--accent);border-color:var(--accent-line);background:var(--accent-soft)}.example-copy pre{margin-top:0}.example-run-result{display:flex;flex-direction:column;gap:9px;margin-top:12px;padding:10px 11px;border:1px solid var(--border);border-radius:var(--r-sm);background:var(--panel-soft)}.example-run-result.is-pass{border-color:color-mix(in srgb,var(--ok) 40%,var(--border))}.example-run-result.is-fail,.example-run-result.is-error{border-color:color-mix(in srgb,var(--err) 42%,var(--border))}.example-run-result.is-running{font-family:var(--mono);font-size:12px;color:var(--muted)}.example-run-result-head{display:flex;align-items:center;justify-content:space-between;gap:10px;font-family:var(--mono);font-size:11px;font-weight:600;color:var(--text)}.example-run-result-head span{display:inline-flex;align-items:center;gap:6px}.example-run-result-head small{color:var(--faint);font-size:10.5px}.example-run-result.is-pass .example-run-result-head span{color:var(--ok)}.example-run-result.is-fail .example-run-result-head span,.example-run-result.is-error .example-run-result-head 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div{display:flex;flex-direction:column;gap:3px}.solution-locked strong{font-family:var(--mono);font-size:12px;letter-spacing:.06em;text-transform:uppercase;color:var(--text)}.solution-locked span{font-size:13px;line-height:1.55}.solution-gate{display:flex;flex-direction:column;gap:12px;padding:14px 16px;background:var(--bg-raised);border:1px dashed var(--border-strong);border-radius:var(--r)}.solution-gate-copy{font-size:13.5px;line-height:1.6;color:var(--muted)}.solution-gate-copy strong{color:var(--warn)}.reveal-button{display:inline-flex;align-self:flex-start;align-items:center;gap:8px;padding:9px 14px;font-family:var(--mono);font-size:12px;font-weight:600;letter-spacing:.04em;color:var(--accent);background:var(--accent-soft);border:1px solid var(--accent-line);border-radius:var(--r-sm);transition:box-shadow .16s,background 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small{font-family:var(--mono);font-size:11px;color:var(--muted)}.wk-editor{display:flex;flex-direction:column;height:100%;min-height:0;background:var(--editor-bg)}.wk-actionbar{flex:none;display:flex;align-items:center;gap:10px;min-height:46px;padding:7px 12px;background:var(--bg-raised);border-bottom:1px solid var(--border)}.wk-lang{font-family:var(--mono);font-size:11.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);white-space:nowrap}.wk-lang:before{content:"▸ ";color:var(--accent)}.wk-actions{margin-left:auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:flex-end}.wk-editor-body{flex:1;min-height:0;overflow:hidden}.wk-mobile-editor-context{display:none}.wk-results{display:flex;flex-direction:column;height:100%;min-height:0;background:var(--term);border-top:1px solid var(--border)}.wk-results-scroll{flex:1;min-height:0;overflow-y:auto}.wk-results.is-console-only .wk-results-scroll,.wk-results.is-console-only 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button.is-active{color:var(--accent);background:var(--accent-soft)}.run-state{margin-left:auto;font-family:var(--mono);font-size:10px;font-weight:600;letter-spacing:.09em;text-transform:uppercase;padding:3px 9px;border-radius:var(--r-pill);border:1px solid transparent}.run-state.is-passed{color:var(--ok);background:color-mix(in srgb,var(--ok) 14%,transparent);border-color:color-mix(in srgb,var(--ok) 34%,transparent)}.run-state.is-failed{color:var(--err);background:color-mix(in srgb,var(--err) 14%,transparent);border-color:color-mix(in srgb,var(--err) 34%,transparent)}.runner-case-tabs{display:flex;flex-wrap:wrap;gap:6px;padding:10px 12px;border-bottom:1px solid var(--border)}.runner-case-tabs button{display:inline-flex;align-items:center;gap:6px;padding:5px 10px;font-family:var(--mono);font-size:11px;color:var(--muted);background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--r-sm);transition:border-color .14s,color .14s}.runner-case-tabs button svg{width:14px;height:14px}.runner-case-tabs button.is-active{border-color:var(--accent-line);color:var(--text)}.runner-case-tabs button.is-passed svg{color:var(--ok)}.runner-case-tabs button.is-failed{color:var(--err);border-color:color-mix(in srgb,var(--err) 40%,var(--border))}.runner-case-tabs button.is-failed svg{color:var(--err)}.testcase-body{display:flex;flex-direction:column;gap:11px;padding:14px 12px}.testcase-field{display:flex;flex-direction:column;gap:5px}.testcase-field>span{font-family:var(--mono);font-size:10.5px;letter-spacing:.09em;text-transform:uppercase;color:var(--muted)}.testcase-field code{display:block;font-family:var(--mono);font-size:12.5px;color:var(--text);background:var(--bg-raised);border:1px solid var(--border);border-radius:var(--r-sm);padding:8px 10px;white-space:pre-wrap;word-break:break-word}.testcase-field.is-expected code{color:var(--ok);border-color:color-mix(in srgb,var(--ok) 26%,var(--border))}.test-result-body{padding:14px 12px}.result-heading{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.result-heading strong{font-family:var(--mono);font-size:13px;color:var(--text)}.testcase-panel.is-passed .result-heading strong{color:var(--ok)}.testcase-panel.is-failed .result-heading strong{color:var(--err)}.result-summary{display:flex;gap:14px}.result-summary span{display:inline-flex;align-items:center;gap:5px;font-family:var(--mono);font-size:11.5px;color:var(--muted)}.result-summary span:first-child svg{color:var(--ok)}.result-summary span:last-child svg{color:var(--err)}.runner-console{font-family:var(--mono);font-size:12px;line-height:1.6;color:var(--text);background:color-mix(in srgb,var(--bg) 60%,var(--term));border:1px solid var(--border);border-radius:var(--r-sm);padding:12px;white-space:pre-wrap;word-break:break-word;max-height:360px;overflow:auto}.lint-panel{padding:14px 12px;border-top:1px solid var(--border)}.lint-panel 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32%,var(--border))}.review-panel.is-enabled .rating-row button:nth-child(2){color:var(--warn);border-color:color-mix(in srgb,var(--warn) 32%,var(--border))}.review-panel.is-enabled .rating-row button:nth-child(3){color:var(--accent);border-color:var(--accent-line)}.review-panel.is-enabled .rating-row button:nth-child(4){color:var(--ok);border-color:color-mix(in srgb,var(--ok) 32%,var(--border))}.review-panel.is-enabled .rating-row button:nth-child(1):hover{background:color-mix(in srgb,var(--err) 16%,transparent);box-shadow:0 0 14px color-mix(in srgb,var(--err) 30%,transparent)}.review-panel.is-enabled .rating-row button:nth-child(2):hover{background:color-mix(in srgb,var(--warn) 16%,transparent);box-shadow:0 0 14px color-mix(in srgb,var(--warn) 30%,transparent)}.review-panel.is-enabled .rating-row button:nth-child(3):hover{background:var(--accent-soft);box-shadow:var(--glow)}.review-panel.is-enabled .rating-row button:nth-child(4):hover{background:color-mix(in srgb,var(--ok) 16%,transparent);box-shadow:0 0 14px color-mix(in srgb,var(--ok) 30%,transparent)}.wk-empty{font-family:var(--mono);font-size:12.5px;color:var(--muted);padding:8px 0}.problem-workspace{flex-direction:column;overflow:hidden}.learning-stagebar{flex:none;min-height:48px;display:flex;align-items:stretch;padding:0 10px;overflow-x:auto;border-bottom:1px solid var(--border);background:var(--bg-raised);scrollbar-width:none}.learning-stagebar::-webkit-scrollbar{display:none}.learning-stagebar button{position:relative;flex:0 0 auto;min-width:116px;display:flex;align-items:center;justify-content:center;gap:7px;padding:0 12px;color:var(--muted);font-family:var(--mono)}.learning-stagebar button>span{width:18px;height:18px;display:grid;place-items:center;border:1px solid var(--border-strong);border-radius:50%;font-size:9px}.learning-stagebar button em{font-size:10px;font-style:normal;font-weight:600;letter-spacing:.06em;text-transform:uppercase}.learning-stagebar button.is-active{color:var(--accent)}.learning-stagebar button.is-complete{color:var(--ok)}.learning-stagebar button.is-complete>span{border-color:color-mix(in srgb,var(--ok) 58%,var(--border));background:color-mix(in srgb,var(--ok) 10%,transparent)}.learning-stagebar button:disabled{opacity:.42;cursor:not-allowed}.learning-stagebar button.is-active:after{content:"";position:absolute;inset:auto 12px -1px;height:2px;background:var(--accent)}.learning-stagebar .learning-pause{min-width:auto;margin-left:auto;color:var(--faint)}.learning-stagebar .learning-pause:hover{color:var(--text)}.guided-stage-coach{position:relative;z-index:7;flex:none;min-width:0;display:grid;grid-template-columns:auto minmax(260px,1fr) auto;align-items:center;gap:18px;padding:12px clamp(16px,2vw,28px);border-block:1px solid color-mix(in srgb,var(--accent-ink) 24%,transparent);background:var(--accent);color:var(--accent-ink);box-shadow:0 8px 24px color-mix(in srgb,var(--accent) 16%,transparent)}.guided-coach-marker{min-width:88px;display:grid;gap:5px;padding-right:18px;border-right:1px solid color-mix(in srgb,var(--accent-ink) 24%,transparent);font-family:var(--mono);text-transform:uppercase}.guided-coach-marker span,.guided-coach-location{color:var(--accent-ink);font:600 9px/1.2 var(--mono);letter-spacing:.08em;text-transform:uppercase}.guided-coach-marker strong{color:color-mix(in srgb,var(--accent-ink) 72%,transparent);font-size:10px;letter-spacing:.04em}.guided-coach-copy{min-width:0;display:grid;grid-template-columns:auto 1fr;gap:3px 12px}.guided-coach-location{grid-column:1 / -1;color:color-mix(in srgb,var(--accent-ink) 64%,transparent);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.guided-coach-copy>strong{align-self:baseline;color:var(--accent-ink);font:600 13px/1.35 var(--mono);white-space:nowrap}.guided-coach-copy p{min-width:0;margin:0;color:color-mix(in srgb,var(--accent-ink) 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15%,transparent)}.guided-coach-ready{display:inline-flex;align-items:center;gap:7px;color:var(--accent-ink);font:600 10px/1.3 var(--mono);white-space:nowrap}.guided-coach-blocker{color:color-mix(in srgb,var(--accent-ink) 72%,transparent);font:600 9px/1.3 var(--mono);white-space:nowrap}.guided-coach-toggle{display:none}.learning-workspace-body{flex:1;min-width:0;min-height:0;display:flex}.wk-plan-stage{max-width:700px;margin:0 auto;padding:clamp(24px,4vw,48px)}.wk-stage-kicker{color:var(--accent);font:600 10px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase}.wk-plan-stage h2{margin:10px 0;color:var(--text);font:600 clamp(20px,3vw,28px)/1.25 var(--mono)}.wk-plan-stage>p{margin:0 0 20px;color:var(--muted);line-height:1.6}.wk-autosave{margin-left:8px;color:var(--faint);font-size:9px;font-style:normal;letter-spacing:.03em;text-transform:none}.wk-autosave.is-saved{color:var(--ok)}.wk-autosave.is-error{color:var(--err)}.wk-plan-dock{flex:none;border-bottom:1px solid var(--accent-line);background:color-mix(in srgb,var(--accent) 7%,var(--bg-raised))}.wk-editor-lock-note{flex:none;min-height:36px;display:flex;align-items:center;gap:7px;padding:7px 12px;border-bottom:1px solid var(--accent-line);color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,var(--bg-raised));font:600 9px/1.3 var(--mono);letter-spacing:.03em}.wk-editor.is-locked .wk-editor-body{opacity:.58}.wk-plan-dock-toggle{width:100%;min-height:36px;display:grid;grid-template-columns:auto auto minmax(0,1fr) auto;align-items:center;gap:7px;padding:7px 12px;color:var(--muted);text-align:left}.wk-plan-dock-toggle>svg:first-child,.wk-plan-dock-toggle strong{color:var(--accent)}.wk-plan-dock-toggle strong{font:600 9px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase;white-space:nowrap}.wk-plan-dock-toggle span{overflow:hidden;color:var(--text);font-size:11px;text-overflow:ellipsis;white-space:nowrap}.wk-plan-dock-toggle>svg:last-child{transition:transform .16s 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center;padding:clamp(28px,6vw,72px) 18px;background:radial-gradient(circle at 50% -20%,color-mix(in srgb,var(--accent) 12%,transparent),transparent 42%),var(--bg)}.onboarding-brand{position:absolute;top:22px;left:clamp(18px,4vw,48px);font:700 14px/1 var(--mono);letter-spacing:.08em;color:var(--text)}.onboarding-brand span{color:var(--accent)}.onboarding-card{width:min(680px,100%);padding:clamp(28px,5vw,52px);margin-top:24px;border:1px solid var(--border);border-radius:18px;background:color-mix(in srgb,var(--panel) 96%,transparent);box-shadow:0 28px 80px #00000038}.onboarding-icon{width:48px;height:48px;display:grid;place-items:center;margin-bottom:24px;border:1px solid color-mix(in srgb,var(--accent) 38%,var(--border));border-radius:14px;color:var(--accent);background:color-mix(in srgb,var(--accent) 8%,var(--panel))}.onboarding-card h1{margin:0;max-width:600px;color:var(--text);font:600 clamp(28px,5vw,42px)/1.1 var(--mono);letter-spacing:-.04em}.onboarding-lead{max-width:600px;margin:14px 0 30px;color:var(--muted);font-size:15px;line-height:1.7}.onboarding-fieldset{border:0;padding:0;margin:0 0 26px}.onboarding-fieldset legend{display:flex;align-items:center;gap:7px;margin-bottom:11px;color:var(--text);font:600 12px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase}.onboarding-option-list{display:grid;gap:8px}.onboarding-option,.recommendation-paths>button,.diagnostic-options>button{width:100%;display:flex;align-items:flex-start;gap:12px;padding:15px;text-align:left;color:var(--text);border:1px solid var(--border);border-radius:11px;background:var(--bg-raised);transition:border-color .15s ease,background .15s ease,transform .15s ease}.onboarding-option:hover,.recommendation-paths>button:hover,.diagnostic-options>button:hover{transform:translateY(-1px);border-color:var(--border-strong)}.onboarding-option.is-selected,.recommendation-paths>button.is-selected,.diagnostic-options>button.is-selected{border-color:color-mix(in srgb,var(--accent) 65%,var(--border));background:color-mix(in srgb,var(--accent) 7%,var(--bg-raised))}.onboarding-option-check,.recommendation-mark,.diagnostic-options>button>span:first-child{flex:0 0 auto;width:22px;height:22px;display:grid;place-items:center;border:1px solid var(--border-strong);border-radius:50%;color:var(--bg);background:var(--panel)}.is-selected>.onboarding-option-check,.is-selected>.recommendation-mark,.diagnostic-options>button.is-selected>span:first-child{border-color:var(--accent);background:var(--accent)}.onboarding-option strong,.recommendation-paths strong{display:block;margin:1px 0 5px;font:600 14px/1.25 var(--sans)}.onboarding-option small,.recommendation-paths small{display:block;color:var(--muted);font-size:13px;line-height:1.45}.duration-picker{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.duration-picker button{display:flex;align-items:baseline;justify-content:center;gap:5px;min-height:58px;border:1px solid var(--border);border-radius:10px;color:var(--muted);background:var(--bg-raised)}.duration-picker button.is-selected{color:var(--accent);border-color:var(--accent);background:color-mix(in srgb,var(--accent) 7%,var(--panel))}.duration-picker strong{font:600 22px/1 var(--mono)}.duration-picker span{font:500 11px/1 var(--mono);text-transform:uppercase}.onboarding-primary{width:100%;min-height:52px;justify-content:center;gap:10px;margin-top:6px}.onboarding-progress-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px;color:var(--muted);font:500 12px/1 var(--mono)}.onboarding-back{display:inline-flex;align-items:center;gap:6px;padding:7px 0;border:0;color:var(--muted);background:transparent;font:500 12px/1 var(--mono)}.onboarding-back:hover{color:var(--accent)}.onboarding-back.is-centered{display:flex;margin:12px auto 0}.onboarding-progress{height:3px;margin-bottom:36px;overflow:hidden;border-radius:3px;background:var(--border)}.onboarding-progress span{display:block;height:100%;background:var(--accent);transition:width .18s ease}.diagnostic-topic{display:block;margin-bottom:12px;color:var(--accent);font:600 11px/1 var(--mono);letter-spacing:.1em;text-transform:uppercase}.onboarding-card .diagnostic-question{font-size:clamp(23px,4vw,32px);line-height:1.25}.diagnostic-options{display:grid;gap:9px;margin:26px 0 18px}.diagnostic-options>button{align-items:center;min-height:56px;font:500 14px/1.4 var(--sans)}.onboarding-count{margin:12px 0 0;text-align:center;color:var(--muted);font:500 11px/1 var(--mono)}.recommendation-paths{display:grid;gap:10px;margin:28px 0 18px}.recommendation-paths>button{position:relative;padding-right:128px}.recommendation-paths em{position:absolute;right:14px;top:14px;display:flex;gap:5px;color:var(--accent);font:500 10px/1 var(--mono);letter-spacing:.06em;text-transform:uppercase}@media(max-width:560px){.onboarding-shell{padding:70px 12px 24px;place-items:start center}.onboarding-card{margin:0;padding:25px 18px;border-radius:14px}.onboarding-card h1{font-size:27px}.recommendation-paths>button{padding-right:15px}.recommendation-paths em{position:static;margin-left:auto;align-self:center}}