:root{--text-xs: 12px;--text-sm: 14px;--text-base: 16px;--text-lg: 22px;--text-xl: 32px;--font-serif: "Songti TC", "Source Han Serif TC", Georgia, serif;--font-body: "Songti TC", "Source Han Serif TC", Georgia, -apple-system, serif;--font-sans: "DM Sans", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", sans-serif;--font-mono: "DM Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;--paper: #f4f0e8;--sheet: #fffdf8;--ink: #242923;--muted: #55584f;--line: #ded9ce;--soft: #eae5da;--accent: #a43820;--accent-wash: #f7e6df;--green: #536e58;--code: #eeece5;--side: #e9e4d9;--shadow: 0 18px 60px #25251b0b}[data-theme=dark]{--paper: #20221f;--sheet: #292c28;--ink: #eee9dd;--muted: #a9a99e;--line: #454841;--soft: #343731;--accent: #ef8a6b;--accent-wash: #472e28;--green: #a9c2a7;--code: #20221f;--side: #252823;--shadow: 0 18px 60px #0003}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:65px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-body);font-size:var(--text-base);line-height:1.75;transition:background .25s,color .25s}a{color:inherit}button,input,select{font:inherit;color:inherit}button{cursor:pointer}.skip-link{position:fixed;z-index:100;top:-4rem;left:1rem;padding:.7rem 1rem;background:var(--ink);color:var(--sheet)}.skip-link:focus{top:1rem}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--accent);outline-offset:1px}.challenge-page :focus-visible,.challenge-stage-overlay :focus-visible{outline:2px solid #c8f135;outline-offset:2px}.topbar{height:76px;padding:0 4vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:var(--sheet);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-family:var(--font-serif);font-size:var(--text-lg);letter-spacing:-.04em;line-height:1}.brand i{color:var(--accent);font-weight:400}.brand small{display:block;margin-top:6px;color:var(--muted);font:var(--text-xs)/1.2 var(--font-mono);letter-spacing:.15em}.brand-mark{display:grid;place-items:center;width:34px;height:34px;background:var(--accent);color:#fff8ea;font-size:var(--text-lg);font-family:Georgia,serif;transform:rotate(-12deg)}.top-actions{display:flex;align-items:center;gap:13px}.view-switch{display:flex;gap:2px;padding:4px;border:1px solid var(--line);border-radius:4px;background:var(--paper)}.view-switch button{border:0;border-radius:3px;padding:6px 10px;background:transparent;color:var(--muted);font-size:var(--text-xs)}.view-switch button[aria-pressed=true]{background:var(--ink);color:var(--sheet)}.icon-button{border:1px solid var(--line);background:transparent;border-radius:50%;width:34px;height:34px;font-size:var(--text-base)}.shell{display:grid;grid-template-columns:288px minmax(0,1fr);max-width:1600px;margin:0 auto;min-height:100vh}.sidebar{background:var(--side);border-right:1px solid var(--line);padding:35px 0 0;display:flex;flex-direction:column;position:sticky;top:0;height:100vh;height:100dvh;overflow:hidden}.sidebar-top{padding:0 23px;flex-shrink:0}.eyebrow,.section-kicker,.overline{font:var(--text-xs)/1.4 var(--font-mono);text-transform:uppercase;letter-spacing:.15em;color:var(--muted)}.side-intro{font-family:var(--font-serif);font-size:var(--text-lg);line-height:1.35;margin:11px 0 28px;letter-spacing:-.02em}.search-label,.filter-label{display:block;font:var(--text-xs) var(--font-mono);letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 7px}.search-wrap{display:flex;align-items:center;gap:8px;border:1px solid var(--line);padding:0 9px;background:var(--sheet);height:39px}.search-wrap span{font-size:var(--text-base);color:var(--muted)}.search-wrap input{border:0;background:transparent;outline:0;min-width:0;flex:1;font-size:var(--text-sm)}.search-wrap kbd{color:var(--muted);font:var(--text-xs) var(--font-mono);border:1px solid var(--line);padding:1px 4px}.filter-label{margin-top:18px}#progress-filter,#difficulty-filter{width:100%;border:1px solid var(--line);background:var(--sheet);height:37px;padding:0 8px;font-size:var(--text-sm)}.filter-count{display:flex;align-items:center;gap:10px;color:var(--muted);font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.12em;margin:18px 0 12px;padding:0 23px;white-space:nowrap;flex-shrink:0}.filter-count:empty{display:none}.filter-count:after{content:"";height:1px;background:var(--line);flex:1;min-width:20px}.filter-count:not(:empty)+.proposal-nav{margin-top:0}.proposal-nav{flex:1;min-height:0;overflow-y:auto;overscroll-behavior:contain;padding:0 23px 28px;display:grid;gap:6px;align-content:start}.progress-summary{display:none}.nav-item{display:block;text-decoration:none;padding:12px 12px 11px;border-left:2px solid transparent;overflow-wrap:anywhere;word-break:break-word}.nav-item:hover,.nav-item.active{background:color-mix(in srgb,var(--sheet) 63%,transparent);border-left-color:var(--accent)}.nav-id{display:inline-flex;align-items:center;gap:6px;font:var(--text-xs) var(--font-mono);letter-spacing:.08em;color:var(--accent);overflow-wrap:anywhere;word-break:break-word}.progress-badge{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;font-size:11px;font-family:system-ui,-apple-system,sans-serif;font-weight:700;line-height:1;flex-shrink:0}.progress-badge.learned{background:var(--green);color:#fff}[data-theme=dark] .progress-badge.learned{color:var(--paper)}.progress-badge.skipped{background:color-mix(in srgb,var(--muted) 25%,transparent);color:var(--muted);font-weight:800}.nav-title{display:block;margin:3px 0 5px;font-family:var(--font-serif);font-size:var(--text-base);line-height:1.35;overflow-wrap:anywhere;word-break:break-word}.nav-meta{color:var(--muted);font-size:var(--text-xs)}.sidebar-bottom{margin-top:auto;padding-top:22px}.coverage{border-top:1px solid var(--line);padding:15px 0 7px;display:flex;align-items:center;gap:7px;font-size:var(--text-xs);color:var(--muted)}.coverage strong{margin-left:auto;color:var(--ink);font:var(--text-xs) var(--font-mono)}.coverage-dot{width:6px;height:6px;background:var(--accent);border-radius:50%}.sidebar-bottom p{color:var(--muted);font-size:var(--text-xs);line-height:1.5;margin:5px 0 14px}.sidebar-bottom a{font-size:var(--text-xs);text-decoration:none;border-bottom:1px solid var(--line);padding-bottom:3px}.progress-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px;margin-top:15px}.progress-actions button,.modal-actions button{border:1px solid var(--line);background:var(--sheet);padding:8px 9px;font-size:var(--text-sm);text-align:left}.progress-actions button:hover,.modal-actions button:hover{border-color:var(--accent);color:var(--accent)}.progress-summary{margin-top:10px;padding:11px 12px;border:1px solid var(--line);background:var(--sheet);font-size:var(--text-xs);color:var(--muted)}.progress-summary strong{color:var(--ink)}.progress-summary-track{height:4px;margin-top:8px;background:var(--line)}.progress-summary-track span{display:block;height:100%;background:var(--green)}.proposal-heading-state{display:inline-flex;align-items:center;gap:9px;margin-top:12px}.proposal-heading-state button{border:1px solid var(--line);background:var(--sheet);padding:6px 9px;font-size:var(--text-xs)}.app-modal{width:min(590px,calc(100vw - 28px));max-height:min(86vh,820px);overflow:auto;padding:22px;border:1px solid var(--line);background:var(--sheet);color:var(--ink);box-shadow:0 24px 90px #0005}.app-modal::backdrop{background:#10120fb0}.modal-header{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding-bottom:14px;border-bottom:1px solid var(--line)}.modal-header h2{margin:4px 0 0;font:500 var(--text-lg)/1.3 var(--font-serif)}.modal-kicker{color:var(--muted);font:var(--text-xs) var(--font-mono);letter-spacing:.13em}.progress-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:16px 0}.progress-stat{padding:10px;background:var(--paper);color:var(--muted);font-size:var(--text-xs)}.progress-stat strong{display:block;color:var(--ink);font:var(--text-lg) var(--font-mono)}.modal-section{margin-top:18px}.modal-section h3{margin:0 0 8px;font-size:var(--text-sm)}.modal-actions{display:grid;grid-template-columns:1fr 1fr;gap:7px}.modal-actions .danger-action{color:var(--accent)}.compact-actions{grid-template-columns:max-content max-content}.modal-message{min-height:1.5em;color:var(--muted);font-size:var(--text-xs)}.quiz-challenge-card{margin:36px 0 12px;padding:22px;border:1px solid var(--line);border-radius:10px;background:var(--paper)}.quiz-header{display:flex;align-items:baseline;flex-wrap:wrap;gap:8px 12px}.quiz-badge{color:var(--accent);font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.1em}.quiz-header h3{margin:0;font:500 var(--text-lg)/1.35 var(--font-serif)}.quiz-question{margin:15px 0 10px;font-weight:500;font-size:var(--text-base)}.quiz-challenge-card code,.exploration-modal code{font:.88em var(--font-mono);background:var(--code);padding:.15em .35em;border-radius:3px}.quiz-options{display:grid;gap:7px}.quiz-option{display:flex;gap:9px;align-items:flex-start;padding:10px 12px;border:1px solid var(--line);background:var(--sheet);cursor:pointer;font-size:var(--text-sm)}.quiz-option:has(input:checked){border-color:var(--accent)}.quiz-option input{margin-top:4px;accent-color:var(--accent)}.quiz-option.is-correct{border-color:var(--green);background:color-mix(in srgb,var(--green) 13%,var(--sheet))}.quiz-option.is-wrong{border-color:var(--accent);background:var(--accent-wash)}.quiz-feedback{margin-top:12px;padding:11px 13px;border-left:3px solid var(--green);background:color-mix(in srgb,var(--green) 12%,var(--sheet));font-size:var(--text-sm)}.quiz-feedback.wrong{border-left-color:var(--accent);background:var(--accent-wash)}.quiz-feedback p{margin:5px 0 0}.quiz-actions{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.quiz-actions button,.quiz-actions a{border:1px solid var(--line);background:var(--sheet);padding:8px 11px;font-size:var(--text-sm);text-decoration:none}.quiz-actions .btn-primary{background:var(--ink);border-color:var(--ink);color:var(--sheet)}.exploration-modal{width:min(700px,calc(100vw - 28px))}.exploration-meta{margin:15px 0 8px;color:var(--muted);font:var(--text-xs) var(--font-mono)}.exploration-result{margin-top:13px;padding:12px;border:1px solid var(--line);background:var(--paper);font-size:var(--text-sm)}.exploration-result a{display:inline-block;margin-top:8px}main{min-width:0}#view{min-height:80vh;max-width:1120px;margin:0 auto;padding:35px clamp(28px,5vw,78px) 110px}#view.reader-view{width:calc(66.666667vw + 34px);max-width:100%;margin:0;padding-top:0;padding-inline:0}#view.reader-view>.back-link{margin-left:0}.hero{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 225px;gap:42px;padding:37px 42px 39px;background:var(--sheet);border:1px solid var(--line);box-shadow:var(--shadow);overflow:hidden}.hero:after{content:"";width:280px;height:280px;position:absolute;right:-119px;top:-135px;border:1px solid var(--line);border-radius:50%;box-shadow:0 0 0 24px var(--sheet),0 0 0 25px var(--line),0 0 0 58px var(--sheet),0 0 0 59px var(--line);opacity:.55;pointer-events:none}.hero-copy{position:relative;z-index:1}.hero h1{font:500 var(--text-xl)/1.2 var(--font-serif);letter-spacing:-.03em;margin:23px 0 17px;max-width:650px}.hero h1 span{color:var(--accent)}.hero-deck{font-family:var(--font-serif);font-size:var(--text-base);color:var(--muted);max-width:620px;line-height:1.8}.hero-aside{position:relative;z-index:1;align-self:end;padding-bottom:5px}.hero-aside .number{font:var(--text-xl)/1 var(--font-serif);font-size:56px;color:var(--accent);letter-spacing:-.05em}.hero-aside p{color:var(--muted);font-size:var(--text-xs);max-width:130px;margin:15px 0 0}.catalog-head{display:flex;align-items:end;justify-content:space-between;margin:55px 0 15px;border-bottom:1px solid var(--ink);padding-bottom:12px}.catalog-head h2{margin:0;font:500 var(--text-lg) var(--font-serif);letter-spacing:-.02em}.catalog-head span{color:var(--muted);font:var(--text-xs) var(--font-mono)}.proposal-grid{display:grid;gap:11px}.proposal-card{content-visibility:auto;contain-intrinsic-size:80px;display:grid;grid-template-columns:106px minmax(0,1fr) auto;gap:16px;align-items:center;text-decoration:none;padding:16px 20px;background:var(--sheet);border:1px solid var(--line);transition:border-color .15s,transform .15s}.proposal-card:hover{border-color:var(--accent);transform:translateY(-2px)}.card-id{display:inline-flex;align-items:center;gap:6px;color:var(--accent);font:var(--text-xs) var(--font-mono)}.card-title{font:500 var(--text-lg)/1.25 var(--font-serif);letter-spacing:-.02em;margin:0 0 4px}.card-zh{font:var(--text-sm) var(--font-serif);color:var(--muted);margin:0}.card-status{justify-self:end;text-align:right}.status-pill{display:inline-flex;gap:6px;align-items:center;padding:5px 8px;color:var(--green);border:1px solid color-mix(in srgb,var(--green) 40%,var(--line));text-transform:uppercase;letter-spacing:.08em;font:var(--text-xs) var(--font-mono)}.catalog-foot{display:flex;justify-content:space-between;color:var(--muted);border-top:1px solid var(--line);margin-top:16px;padding-top:11px;font-size:var(--text-xs)}.reader{display:block}.article{min-width:0;padding:32px;background:var(--sheet);border:1px solid var(--line);border-radius:4px}.article.proposal-001{background:#fffdf7;border-top:0;border-radius:0 0 4px 4px}[data-theme=dark] .article.proposal-001{background:var(--sheet)}.floating-toc{position:fixed;bottom:84px;right:24px;z-index:1000;display:inline-flex;align-items:center;gap:9px;padding:10px 16px;border:1px solid var(--line);border-radius:6px;background:var(--sheet);box-shadow:var(--shadow);font-size:var(--text-sm)}.floating-toc:hover{color:var(--accent);border-color:var(--accent)}.floating-toc svg{width:18px;height:18px}html.toc-open{overflow:hidden}.reader-aside{position:fixed;inset:0;margin:0 0 0 auto;width:360px;max-width:calc(100% - 24px);height:100vh;height:100dvh;max-height:none;padding:0;border:0;border-left:1px solid var(--line);background:var(--sheet);color:var(--ink);box-shadow:-16px 0 60px #0002;transform:translate(100%);transition:transform .25s ease,display .25s allow-discrete,overlay .25s allow-discrete}.reader-aside[open]{display:flex;flex-direction:column;transform:translate(0)}.reader-aside::backdrop{background:#0005;opacity:0;transition:opacity .25s ease,display .25s allow-discrete,overlay .25s allow-discrete}.reader-aside[open]::backdrop{opacity:1}@starting-style{.reader-aside[open]{transform:translate(100%)}.reader-aside[open]::backdrop{opacity:0}}.toc-header{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:24px;border-bottom:1px solid var(--line)}.toc-header .toc-title{margin:0;color:var(--ink)}.toc-close{flex-shrink:0;font-size:var(--text-lg);line-height:1}.reader-aside .toc-list{min-height:0;overflow:auto;overscroll-behavior:contain;padding:20px 24px 32px}.toc-list a{overflow-wrap:anywhere}.back-link{text-decoration:none;display:inline-flex;gap:8px;align-items:center;font-size:var(--text-xs);color:var(--muted);margin-bottom:25px}.back-link:hover{color:var(--accent)}.proposal-heading{padding:0 0 28px}.proposal-heading .proposal-id{font:var(--text-xs) var(--font-mono);color:var(--accent);letter-spacing:.09em}.proposal-heading h1{margin:14px 0 10px;font:600 var(--text-xl)/1.25 var(--font-serif);letter-spacing:-.02em}.proposal-heading .zh-title{margin:0;font:var(--text-lg)/1.4 var(--font-serif);color:var(--muted)}.proposal-heading h1{order:0}.proposal-heading--minimal{padding:0 0 24px;border-bottom:1px solid var(--line);margin-bottom:6px}.proposal-heading--minimal .proposal-heading-top{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:12px}.proposal-heading--minimal .proposal-id{font:var(--text-xs) var(--font-mono);color:var(--accent);letter-spacing:.09em}.proposal-heading--minimal .proposal-heading-state{margin-top:0;display:inline-flex;align-items:center;gap:8px;font-size:var(--text-xs);color:var(--muted)}.proposal-heading--minimal .progress-state-text{font-family:var(--font-sans)}.proposal-heading--minimal .progress-state-text strong{color:var(--ink)}.proposal-heading--minimal .progress-cycle-btn{border:1px solid var(--line);background:var(--sheet);padding:4px 10px;border-radius:4px;font:500 var(--text-xs) var(--font-sans);cursor:pointer;color:var(--ink);transition:border-color .15s,color .15s}.proposal-heading--minimal .progress-cycle-btn:hover{border-color:var(--accent);color:var(--accent)}.proposal-heading--minimal .proposal-heading-titles{margin-bottom:14px}.proposal-heading--minimal h1{margin:0 0 6px;font:600 var(--text-xl)/1.25 var(--font-serif);letter-spacing:-.02em}.proposal-heading--minimal .zh-title{margin:0;font:400 var(--text-base)/1.4 var(--font-serif);color:var(--muted)}.proposal-heading h1 code,.proposal-heading .zh-title code,.card-title code,.plan-item-title code{font-family:var(--font-mono);font-size:.88em;font-weight:500;color:inherit;background:var(--code);padding:.12em .35em;border-radius:4px;border:none;display:inline-block;vertical-align:baseline;line-height:1.3;text-decoration:none}.proposal-heading--minimal .summary{margin:14px 0 18px;font:var(--text-base)/1.8 var(--font-serif);color:var(--ink);opacity:.92;max-width:820px}.proposal-heading--minimal .meta-row{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-top:14px}.proposal-heading--minimal .meta-chip{padding:3px 8px;background:var(--paper);border:1px solid var(--line);border-radius:3px;font:var(--text-xs)/1.4 var(--font-mono);color:var(--muted)}.proposal-heading--minimal .meta-chip+.meta-chip:before{content:none}.proposal-heading--minimal .meta-links{display:flex;flex-wrap:wrap;align-items:center;gap:16px;margin-top:14px;font-size:var(--text-xs);color:var(--muted)}.proposal-heading--minimal .meta-links a{color:var(--muted);text-decoration:underline;text-underline-offset:3px}.proposal-heading--minimal .meta-links a:hover{color:var(--accent)}.tutorial-prerequisites{margin:0 0 24px;padding:14px 18px;background:var(--paper);border-left:3px solid var(--accent);border-radius:4px;font:var(--text-sm)/1.75 var(--font-serif)}.tutorial-prerequisites>strong{display:block;font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.08em;color:var(--accent);margin-bottom:6px}.tutorial-prerequisites ul{margin:0;padding-left:1.25rem}.reader-toolbar{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px 20px}.reader-tabs{display:flex;gap:22px}.reader-tabs [role=tab]{border:0;border-bottom:2px solid transparent;background:transparent;padding:14px 0;color:var(--muted);text-align:left;font:500 var(--text-sm)/1.5 var(--font-sans)}.reader-tabs [role=tab] span{font-size:var(--text-xs);font-weight:400;margin-left:7px}.reader-tabs [role=tab][aria-selected=true]{color:var(--ink);border-bottom-color:var(--accent)}.reader-toolbar .view-switch{border:0;background:var(--paper);margin-block:7px}.status-callout{margin-top:16px;padding:11px 13px;background:var(--accent-wash);border-left:3px solid var(--accent);font:var(--text-sm)/1.75 var(--font-serif)}.prerequisites{margin-top:15px;padding-top:13px;border-top:1px solid var(--line);font:var(--text-sm)/1.75 var(--font-serif)}.prerequisites>strong{font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}.prerequisites ul{margin:7px 0 0;padding-left:1.2rem}.full-source .section-divider{margin-top:20px}.summary{margin:20px 0;font:var(--text-base)/1.85 var(--font-serif);max-width:780px;color:var(--muted)}.summary p{margin:0}.meta-row{display:flex;flex-wrap:wrap;gap:7px;margin-top:19px}.meta-chip{padding:3px 0;color:var(--muted);font:var(--text-xs)/1.5 var(--font-mono)}.meta-chip+.meta-chip:before{content:"\b7";margin-right:7px;color:var(--line)}.meta-links{display:flex;flex-wrap:wrap;gap:17px;margin-top:17px;font-size:var(--text-xs)}.meta-links a{text-underline-offset:3px}.meta-links a:hover{color:var(--accent)}.source-note{color:var(--muted);font-size:var(--text-xs);line-height:1.7;margin:14px 0 22px;overflow-wrap:anywhere}.source-note a{color:var(--ink);text-underline-offset:2px}.official-label{display:flex;align-items:center;gap:8px;margin:0 0 16px;color:var(--muted);font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.13em}.official-label:after{content:"";flex:1;height:1px;background:var(--line)}.markdown{font:var(--text-base)/1.85 var(--font-body)}.markdown h2,.markdown h3,.markdown h4{font-family:var(--font-serif);font-weight:600;line-height:1.35;letter-spacing:-.02em}.markdown h2{font-size:var(--text-xl)}.markdown h3,.markdown h4{font-size:var(--text-lg)}.markdown p{margin:0 0 1.2em}.markdown ul,.markdown ol{padding-left:1.5em;margin:.4em 0 1em}.markdown li+li{margin-top:.35em}.markdown li>p{margin-bottom:.4em}.markdown li>ul,.markdown li>ol{margin-bottom:.4em}.markdown blockquote{margin:0 0 1.2em;padding:4px 0 4px 20px;border-left:3px solid var(--line);color:var(--muted);font-family:var(--font-serif);font-style:italic}.markdown blockquote>:last-child{margin-bottom:0}.markdown code,.prerequisites code{font:.88em var(--font-mono);background:var(--code);padding:.15em .35em;border-radius:3px}.markdown pre{margin:1.2em 0;padding:18px 20px;overflow:auto;background:var(--code);border-radius:5px;font:var(--text-sm)/1.7 var(--font-mono)}.markdown pre code{background:none;padding:0;font:inherit}.markdown a{text-underline-offset:3px;text-decoration-color:color-mix(in srgb,var(--accent) 55%,transparent)}.markdown a:hover{color:var(--accent)}.markdown table{display:block;width:100%;overflow:auto;border-collapse:collapse;margin:0 0 1.2em;font-size:var(--text-sm)}.markdown th,.markdown td{border:1px solid var(--line);padding:8px 12px;text-align:left}.markdown th{background:var(--soft);font-weight:600}.markdown img{max-width:100%;height:auto}.markdown hr{border:0;border-top:1px solid var(--line);margin:2em 0}.proposal-block{scroll-margin-top:100px;margin:0 0 1.15em}.proposal-block.kind-heading{margin-top:2.3em;margin-bottom:.9em}.proposal-block.kind-heading h2,.proposal-block.kind-heading h3,.proposal-block.kind-heading h4{margin:0}.proposal-block.kind-heading:has(h2){padding-bottom:.5em;border-bottom:1px solid var(--line)}.proposal-block.kind-list{margin-bottom:.3em}.kind-list ul,.kind-list ol{margin:0}.kind-list li>:last-child{margin-bottom:0}.kind-list+.proposal-block:not(.kind-list,.kind-heading){margin-top:1.3em}.pair{display:block}.pair-cell{min-width:0;overflow-wrap:anywhere}.pair-cell+.pair-cell{margin-top:12px}.pair-cell>:last-child{margin-bottom:0}.code-panel{border:1px solid var(--line);background:var(--code);margin:1.2em 0;border-radius:5px;overflow:hidden}.code-head{min-height:36px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:4px 10px 4px 13px}.code-head span{color:var(--muted);font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.09em}.code-tools{display:flex;gap:6px}.code-tools button{background:transparent;border:1px solid var(--line);padding:3px 7px;font:var(--text-xs) var(--font-mono)}.code-tools button:hover,.code-tools button[aria-pressed=true]{background:var(--sheet);border-color:var(--accent);color:var(--accent)}.code-panel pre{margin:0;border-radius:0;font:var(--text-sm)/1.7 var(--font-mono);tab-size:2}.code-explanation{border-top:1px solid var(--line);padding:12px 15px;font:var(--text-sm)/1.75 var(--font-serif);background:var(--sheet)}.code-explanation strong{font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.1em;color:var(--accent)}.reference-block{padding:9px 12px;border:1px dashed var(--line);font-size:var(--text-sm)}.toc-title{font:var(--text-xs) var(--font-mono);letter-spacing:.13em;color:var(--muted);text-transform:uppercase;margin:0 0 12px}.toc-list{display:grid;gap:2px}.toc-list a{text-decoration:none;color:var(--muted);font-size:var(--text-sm);line-height:1.45;padding:5px 7px;border-left:1px solid transparent}.toc-list a[data-depth="3"]{padding-left:15px}.toc-list a[data-depth="4"]{padding-left:22px}.toc-list a:hover,.toc-list a.active{color:var(--accent);border-left-color:var(--accent)}.tutorial,.extension{margin:36px 0;scroll-margin-top:100px}.lesson-intro>.tutorial:first-child{margin-top:14px}.full-source>.proposal-block:first-child.kind-heading{margin-top:14px}.editorial-head{margin-bottom:16px}.editorial-head .kind-label{color:var(--accent);font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.1em}.tutorial .kind-label{display:none}.editorial-head h2{margin:8px 0 0;padding-bottom:12px;border-bottom:1px solid var(--line)}.editorial-body{overflow-wrap:anywhere}.comparison-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin:24px 0 32px}.comparison-card{background:var(--sheet);border:1px solid var(--line);border-left:4px solid var(--line);border-radius:8px;padding:22px 24px;display:flex;flex-direction:column;transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease;box-shadow:0 2px 8px #00000008}.comparison-card:hover{transform:translateY(-2px)}.comparison-card--old,.comparison-card--accent{border-left:4px solid var(--accent);background:color-mix(in srgb,var(--accent-wash) 35%,var(--sheet))}.comparison-card--old:hover,.comparison-card--accent:hover{border-color:var(--accent);box-shadow:0 4px 14px color-mix(in srgb,var(--accent) 15%,transparent)}.comparison-card--new,.comparison-card--green{border-left:4px solid var(--green);background:color-mix(in srgb,var(--green) 8%,var(--sheet))}.comparison-card--new:hover,.comparison-card--green:hover{border-color:var(--green);box-shadow:0 4px 14px color-mix(in srgb,var(--green) 15%,transparent)}.comparison-badge{display:inline-flex;align-items:center;gap:6px;font:600 var(--text-xs)/1.2 var(--font-mono);letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:4px;margin-bottom:14px;width:fit-content;background:color-mix(in srgb,var(--muted) 12%,transparent);color:var(--ink);border:1px solid color-mix(in srgb,var(--line) 80%,transparent)}.comparison-card--old .comparison-badge,.comparison-card--accent .comparison-badge{background:var(--accent-wash);color:var(--accent);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent)}.comparison-card--new .comparison-badge,.comparison-card--green .comparison-badge{background:color-mix(in srgb,var(--green) 18%,transparent);color:var(--green);border:1px solid color-mix(in srgb,var(--green) 35%,transparent)}.comparison-card h3,.comparison-card h4{font-family:var(--font-serif);font-size:var(--text-lg);font-weight:600;line-height:1.35;margin:0 0 14px;color:var(--ink)}.comparison-card p{font-size:var(--text-sm);line-height:1.7;color:var(--ink);margin:0 0 12px}.comparison-card ul{margin:0;padding-left:1.25rem;font-size:var(--text-sm);line-height:1.75;color:var(--ink)}.comparison-card li{margin-bottom:8px}.comparison-card li:last-child{margin-bottom:0}.comparison-card code{font:.9em var(--font-mono);background:var(--code);padding:.15em .35em;border-radius:3px}.comparison-card strong{color:var(--ink)}.comparison-card .consequence-callout{margin-top:14px;padding:12px 14px;border-radius:6px;font-size:var(--text-xs);line-height:1.6;background:color-mix(in srgb,var(--muted) 8%,transparent);border-left:3px solid var(--muted)}.comparison-card .consequence-callout strong{display:block;margin-bottom:6px}.comparison-card .consequence-callout ul{font-size:var(--text-xs);line-height:1.65}.comparison-card--old .consequence-callout,.comparison-card--accent .consequence-callout{background:color-mix(in srgb,var(--accent) 12%,transparent);border-left:3px solid var(--accent)}.comparison-card--new .consequence-callout,.comparison-card--green .consequence-callout{background:color-mix(in srgb,var(--green) 14%,transparent);border-left:3px solid var(--green)}@media(max-width:780px){.comparison-grid{grid-template-columns:1fr;gap:16px}}.editorial-links{display:flex;flex-wrap:wrap;gap:12px;margin-top:15px;font-size:var(--text-sm)}.section-divider{margin:38px 0 15px;display:flex;align-items:center;gap:13px;color:var(--muted);font:var(--text-xs) var(--font-mono);text-transform:uppercase;letter-spacing:.14em}.section-divider:after{content:"";height:1px;background:var(--line);flex:1}.about-page{min-width:0;padding:35px 32px 80px;background:transparent;border:0;border-radius:0;font-family:var(--font-body);color:var(--ink)}.about-hero{margin-top:0;margin-bottom:40px}.about-hero .overline{margin-top:0;font-family:var(--font-mono);font-size:var(--text-xs);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}.about-hero h1{font-family:var(--font-serif);font-size:var(--text-xl);font-weight:600;line-height:1.25;margin:0 0 16px;color:var(--ink);letter-spacing:-.02em}.about-hero h1 span{color:var(--accent)}.about-hero .hero-deck{font-family:var(--font-body);font-size:var(--text-base);line-height:1.85;color:var(--ink);max-width:720px;margin:0}.about-hero-actions{margin-top:24px}.about-cta-btn{display:inline-flex;align-items:center;gap:8px;background:var(--ink);color:var(--sheet);border:1px solid var(--ink);padding:12px 24px;font-family:var(--font-sans);font-size:var(--text-base);font-weight:600;border-radius:6px;text-decoration:none;box-shadow:0 4px 12px #00000014;transition:all .2s}.about-cta-btn:hover{background:var(--accent);border-color:var(--accent);color:#fff;transform:translateY(-2px);box-shadow:0 6px 16px #0000001f}.about-footer-cta{margin-top:48px;padding:32px 24px;background:var(--sheet);border:1px solid var(--line);border-radius:8px;text-align:center;display:flex;flex-direction:column;align-items:center;gap:12px;box-shadow:0 2px 10px #00000005}.about-footer-cta h2,.about-footer-cta h3{margin:0;font-family:var(--font-serif);font-size:var(--text-lg);font-weight:600;color:var(--ink)}.about-footer-cta p{margin:0;font-family:var(--font-body);font-size:var(--text-sm);line-height:1.75;color:var(--muted);max-width:580px}.about-jump-toc{background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:22px;margin-bottom:44px}.jump-toc-head{margin-bottom:16px}.jump-toc-kicker{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--muted);letter-spacing:.14em;text-transform:uppercase}.jump-toc-head h2{font-family:var(--font-serif);font-size:var(--text-lg);font-weight:600;margin:4px 0 0;color:var(--ink)}.faq-jump-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}.faq-jump-card{display:flex;flex-direction:column;gap:6px;padding:12px 14px;border:1px solid var(--line);border-radius:6px;background:var(--sheet);text-decoration:none;transition:all .2s}.faq-jump-card:hover{border-color:var(--accent);background:var(--accent-wash);transform:translateY(-2px)}.jump-badge{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent);font-weight:500}.jump-title{font-family:var(--font-sans);font-size:var(--text-sm);line-height:1.45;color:var(--ink)}.faq-list{display:flex;flex-direction:column;gap:28px}.faq-card{background:var(--sheet);border:1px solid var(--line);border-radius:8px;padding:26px 28px;scroll-margin-top:80px;box-shadow:0 2px 8px #00000005;transition:border-color .2s}.faq-card:hover{border-color:var(--accent)}.faq-card-header{margin-bottom:16px;border-bottom:1px solid var(--line);padding-bottom:14px}.faq-badge{display:inline-block;font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent);background:var(--accent-wash);padding:3px 8px;border-radius:4px;margin-bottom:8px;font-weight:500}.faq-card-header h3{font-family:var(--font-serif);font-size:var(--text-lg);font-weight:600;line-height:1.35;margin:0;color:var(--ink)}.faq-body{font-family:var(--font-body);font-size:var(--text-base);line-height:1.85;color:var(--ink)}.faq-body p{margin:0 0 14px}.faq-body p:last-child{margin-bottom:0}.faq-body ul,.faq-body ol{margin:12px 0 16px 20px;padding:0}.faq-body li{margin-bottom:8px;line-height:1.75}.faq-body a{color:var(--accent);text-decoration:underline;text-underline-offset:3px}.faq-body a:hover{opacity:.85}.faq-body code{font-family:var(--font-mono);font-size:.9em;background:var(--code);padding:2px 6px;border-radius:4px;color:var(--ink)}.about-contribution-box{margin-top:48px;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:28px 24px}.about-contribution-box .footer-kicker{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent);letter-spacing:.12em;text-transform:uppercase;margin-bottom:6px}.about-contribution-box h2,.about-contribution-box h3{font-family:var(--font-serif);font-size:var(--text-lg);font-weight:600;margin:0 0 10px;color:var(--ink)}.about-contribution-box p{font-family:var(--font-body);font-size:var(--text-sm);line-height:1.75;color:var(--muted);margin:0 0 18px}.contribution-links{display:flex;flex-wrap:wrap;align-items:center;gap:14px}.github-pr-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;background:var(--ink);color:var(--sheet);border-radius:6px;font-family:var(--font-sans);font-size:var(--text-sm);font-weight:500;text-decoration:none;transition:all .2s}.github-pr-btn:hover{background:var(--accent);color:#fff;transform:translateY(-1px)}.secondary-gh-link{font-family:var(--font-sans);font-size:var(--text-sm);color:var(--muted);text-decoration:none;font-weight:500}.secondary-gh-link:hover{color:var(--accent);text-decoration:underline}.proposal-editorial-footer{margin-top:48px;padding:32px 28px;background:var(--sheet);border:1px solid var(--line);border-radius:12px;box-shadow:0 4px 16px #00000005}.proposal-editorial-footer .footer-kicker{font-family:var(--font-mono);font-size:var(--text-xs);color:var(--accent);letter-spacing:.12em;text-transform:uppercase;margin-bottom:6px}.proposal-editorial-footer .footer-title{font-family:var(--font-serif);font-size:var(--text-lg);font-weight:600;margin:0 0 10px;color:var(--ink)}.proposal-editorial-footer .footer-desc{font-family:var(--font-body);font-size:var(--text-sm);line-height:1.7;color:var(--muted);margin:0 0 18px;max-width:680px}.proposal-editorial-footer .footer-actions{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:20px}.proposal-editorial-footer .footer-btn{display:inline-flex;align-items:center;padding:8px 16px;border-radius:6px;font-family:var(--font-sans);font-size:var(--text-sm);font-weight:500;text-decoration:none;transition:all .2s}.proposal-editorial-footer .primary-btn{background:var(--accent);color:#fff;border:1px solid var(--accent)}.proposal-editorial-footer .primary-btn:hover{opacity:.9;transform:translateY(-1px)}.proposal-editorial-footer .secondary-btn{background:transparent;color:var(--ink);border:1px solid var(--line)}.proposal-editorial-footer .secondary-btn:hover{background:var(--paper);border-color:var(--accent);color:var(--accent)}.proposal-editorial-footer .footer-faq-pills{display:flex;flex-wrap:wrap;align-items:center;gap:8px;margin-bottom:18px;font-size:var(--text-xs);font-family:var(--font-sans)}.proposal-editorial-footer .faq-pills-label{color:var(--muted);font-weight:500}.proposal-editorial-footer .faq-pill{display:inline-block;padding:4px 10px;background:var(--paper);border:1px solid var(--line);border-radius:14px;color:var(--ink);text-decoration:none;transition:all .2s}.proposal-editorial-footer .faq-pill:hover{border-color:var(--accent);background:var(--accent-wash);color:var(--accent)}.proposal-editorial-footer .footer-meta-note{font-family:var(--font-sans);font-size:var(--text-xs);color:var(--muted);border-top:1px dashed var(--line);padding-top:14px;margin-top:6px;line-height:1.6}.proposal-editorial-footer .footer-meta-note a{color:var(--accent);text-decoration:underline}.proposal-editorial-footer .footer-meta-note a:hover{text-decoration:underline}@media(max-width:640px){.about-page{padding:20px 16px}.about-hero h1{font-size:26px}.faq-card,.proposal-editorial-footer,.about-jump-toc,.about-contribution-box{padding:20px 16px}.faq-jump-grid{grid-template-columns:1fr}}.toast{position:fixed;bottom:22px;left:50%;transform:translate(-50%,20px);opacity:0;pointer-events:none;background:var(--ink);color:var(--sheet);padding:9px 14px;font-size:var(--text-xs);transition:.2s;z-index:60}.toast.show{transform:translate(-50%);opacity:1}.empty{padding:30px 20px;border:1px dashed var(--line);color:var(--muted);text-align:center;font-family:var(--font-serif)}.loading{padding:40px 0;color:var(--muted)}@media(max-width:1100px){.shell{grid-template-columns:245px minmax(0,1fr)}.sidebar{padding-inline:0}.sidebar-top,.filter-count,.proposal-nav{padding-inline:17px}}@media(max-width:790px){.topbar{height:65px;padding:0 17px}.brand{font-size:var(--text-lg)}.shell{display:block;min-height:100vh}.sidebar{position:static;height:auto;overflow:visible;border-right:0;border-bottom:1px solid var(--line);padding:18px 17px 10px}.sidebar-top{display:grid;grid-template-columns:minmax(0,1fr) 180px;column-gap:12px;align-items:center;padding:0}.eyebrow,.side-intro,.sidebar-bottom,.search-label,.filter-label{display:none}.search-wrap{grid-column:1;grid-row:1}#difficulty-filter{grid-column:2;grid-row:1;height:39px}.filter-count{margin:12px 0 0;padding:0}.filter-count:not(:empty)+.proposal-nav{margin-top:8px}.proposal-nav{display:flex;overflow:auto;margin:12px -17px 0;padding:0 17px 8px;gap:7px;flex:none}.nav-item{min-width:172px;padding:8px 10px;border-left:0;border-bottom:2px solid transparent}.nav-item:hover,.nav-item.active{border-bottom-color:var(--accent);border-left-color:transparent}#view{padding:25px 17px 70px}#view.reader-view{width:100%;padding-inline:17px}#view.reader-view>.back-link{margin-left:0}.hero{grid-template-columns:1fr;padding:29px 24px;gap:13px}.hero-aside{display:flex;align-items:end;gap:15px}.hero-aside .number{font-size:44px}.hero-aside p{margin:0;max-width:180px}.hero:after{right:-195px}.proposal-card{grid-template-columns:1fr auto;gap:8px 12px;padding:18px}.card-id{grid-column:1;grid-row:1}.card-content{grid-column:1 / -1;grid-row:2}.card-status{grid-column:2;grid-row:1}.article{padding:24px}}@media(max-width:640px){:root{--text-xs: 12px;--text-sm: 13px;--text-base: 15px;--text-lg: 20px;--text-xl: 26px}}@media(max-width:520px){.progress-stats{grid-template-columns:repeat(2,1fr)}.modal-actions{grid-template-columns:1fr}}@media(max-width:520px){.view-switch button{padding:6px 7px;font-size:var(--text-xs)}.top-actions{gap:7px}.icon-button{width:31px;height:31px}.sidebar-top{grid-template-columns:minmax(0,1fr) 117px}.search-wrap{gap:5px}.search-wrap input{font-size:var(--text-xs)}.search-wrap kbd{display:none}.hero{padding:24px 19px}.proposal-card{padding:15px}.article{padding:20px 18px}.reader-tabs{gap:18px}.reader-tabs [role=tab] span{display:none}.code-head{flex-wrap:wrap;gap:6px;padding:8px 10px}.code-tools{flex-wrap:wrap}.meta-links{gap:10px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}.floating-theme{position:fixed;bottom:24px;right:24px;z-index:1000;background-color:var(--sheet);border:1px solid var(--line);border-radius:50%;width:48px;height:48px;box-shadow:0 4px 12px var(--shadow);font-size:20px}.floating-theme:hover{background-color:var(--soft)}.custom-dropdown{position:relative;margin-top:6px;margin-bottom:24px;font-family:var(--font-ui)}.dropdown-toggle{display:flex;justify-content:space-between;align-items:center;width:100%;padding:8px 12px;background:var(--sheet);border:1px solid var(--line);border-radius:4px;font-size:var(--text-sm);color:var(--ink);cursor:pointer}.dropdown-menu{display:none;position:absolute;top:100%;left:0;width:100%;max-height:250px;overflow-y:auto;background:var(--sheet);border:1px solid var(--line);border-top:none;border-radius:0 0 4px 4px;z-index:100;box-shadow:0 4px 8px var(--shadow)}.custom-dropdown[data-expanded=true] .dropdown-menu,.custom-dropdown[aria-expanded=true] .dropdown-menu,.custom-dropdown:has(.dropdown-toggle[aria-expanded=true]) .dropdown-menu{display:block}.custom-dropdown[data-expanded=true] .dropdown-toggle,.custom-dropdown[aria-expanded=true] .dropdown-toggle,.custom-dropdown:has(.dropdown-toggle[aria-expanded=true]) .dropdown-toggle{border-radius:4px 4px 0 0}.dropdown-item{display:flex;align-items:center;padding:6px 12px;font-size:var(--text-sm);cursor:pointer;color:var(--ink)}.dropdown-item:hover{background:var(--soft)}.dropdown-item input[type=checkbox]{margin-right:8px}.section-divider{display:flex;justify-content:space-between;align-items:center}.control-left{display:flex;align-items:center;gap:14px}.reader-tabs [role=tab]{cursor:pointer}.sticky-header{position:sticky;top:0;z-index:10;background:var(--sheet);display:flex;flex-direction:column}.dropdown-actions{display:flex;justify-content:space-between;padding:8px 12px;border-bottom:1px solid var(--line);background:var(--soft)}.dropdown-actions button{background:transparent;border:none;font-size:var(--text-xs);color:var(--accent);cursor:pointer;padding:0}.dropdown-actions button:hover{text-decoration:underline}.mermaid{display:flex;justify-content:center;align-items:center;margin:1.5em 0;padding:20px;background:var(--code);border:1px solid var(--line);border-radius:6px;overflow-x:auto}.mermaid svg{max-width:100%;height:auto}::-webkit-scrollbar{width:10px;height:10px}::-webkit-scrollbar-track{background:#0000000d;border-radius:999px}[data-theme=dark] ::-webkit-scrollbar-track{background:#ffffff14}::-webkit-scrollbar-thumb{background:#00000040;border-radius:999px;border:2px solid transparent;background-clip:padding-box}[data-theme=dark] ::-webkit-scrollbar-thumb{background:#c8f135a6}::-webkit-scrollbar-thumb:hover{background:#00000073}[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:#c8f135}*{scrollbar-width:thin;scrollbar-color:rgba(0,0,0,.25) rgba(0,0,0,.05)}[data-theme=dark] *{scrollbar-color:rgba(200,241,53,.65) rgba(255,255,255,.08)}html{overflow-y:scroll;scrollbar-width:auto;scrollbar-color:#4a4843 rgba(0,0,0,.07)}html[data-theme=dark]{scrollbar-color:#c8f135 rgba(255,255,255,.08)}html::-webkit-scrollbar{width:25px}html::-webkit-scrollbar-track{background:#0000000f;border-left:1px solid var(--line);border-radius:0}html[data-theme=dark]::-webkit-scrollbar-track{background:#ffffff0f;border-left:1px solid var(--line);border-radius:0}html::-webkit-scrollbar-thumb{background:#4a4843;border-radius:2px;border:1px solid rgba(0,0,0,.15);background-clip:border-box}html::-webkit-scrollbar-thumb:hover{background:#1f1f1d}html[data-theme=dark]::-webkit-scrollbar-thumb{background:#c8f135;border-radius:2px;border:1px solid rgba(255,255,255,.2);box-shadow:inset 0 0 0 1px #0003;background-clip:border-box}html[data-theme=dark]::-webkit-scrollbar-thumb:hover{background:#d8ff44}.challenge-stage-overlay{position:fixed;inset:0;z-index:2000;overflow-y:auto;overflow-x:hidden;background:radial-gradient(ellipse at 14% 72%,rgba(180,230,30,.18) 0%,transparent 46%),radial-gradient(ellipse at 72% 22%,rgba(200,241,53,.1) 0%,transparent 46%),radial-gradient(ellipse at 88% 78%,rgba(60,60,60,.35) 0%,transparent 36%),radial-gradient(ellipse at 40% 10%,rgba(150,200,20,.08) 0%,transparent 32%),#111;color:#f0f0f0;font-family:var(--font-ui, "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", sans-serif);color-scheme:dark}body.challenge-page{position:relative;min-height:100vh;min-height:100dvh;overflow-y:auto;overflow-x:hidden;background:radial-gradient(ellipse at 14% 72%,rgba(180,230,30,.18) 0%,transparent 46%),radial-gradient(ellipse at 72% 22%,rgba(200,241,53,.1) 0%,transparent 46%),radial-gradient(ellipse at 88% 78%,rgba(60,60,60,.35) 0%,transparent 36%),radial-gradient(ellipse at 40% 10%,rgba(150,200,20,.08) 0%,transparent 32%),#111;color:#f0f0f0;font-family:var(--font-ui, "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Noto Sans TC", sans-serif);color-scheme:dark}.challenge-stage-overlay[hidden]{display:none!important}.challenge-stage-overlay:before,.challenge-page:before{position:fixed;inset:0;pointer-events:none;content:"";background-image:radial-gradient(circle,rgba(200,241,53,.35) 0 1px,transparent 1.6px),radial-gradient(circle,rgba(180,220,30,.15) 0 1px,transparent 1.4px);background-position:0 0,36px 58px;background-size:96px 96px,132px 132px;opacity:.22}.challenge-top-bar{position:fixed;top:20px;right:24px;z-index:2100;display:flex;align-items:center;gap:12px}.challenge-nav-bar{position:fixed;top:18px;left:20px;right:20px;z-index:2100;display:flex;align-items:center;justify-content:space-between;pointer-events:none}.challenge-nav-bar>*{pointer-events:auto}.challenge-home-link{display:inline-flex;align-items:center;gap:8px;padding:8px 18px;border-radius:999px;border:.5px solid rgba(255,255,255,.18);background:#ffffff14;color:#fff;font-size:13px;font-weight:600;text-decoration:none;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 4px 16px #0006;transition:transform .18s ease,background .18s ease,border-color .18s ease,color .18s ease}.challenge-home-link:hover{background:#fff3;border-color:#c8f135;color:#c8f135;transform:translateY(-1px)}.challenge-nav-actions{display:flex;align-items:center;gap:12px}.challenge-close-btn{width:44px;height:44px;display:grid;place-items:center;border-radius:999px;border:.5px solid rgba(255,255,255,.18);background:#ffffff14;color:#fff;font-size:26px;line-height:1;cursor:pointer;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 4px 16px #0006;transition:transform .18s ease,background .18s ease}.challenge-close-btn:hover{background:#fff3;transform:scale(1.08)}.music-btn{width:44px;height:44px;display:grid;place-items:center;border-radius:999px;border:.5px solid rgba(255,255,255,.18);background:#ffffff14;color:#c8f135;cursor:pointer;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);box-shadow:0 4px 16px #0006;transition:transform .18s ease,background .18s ease,color .18s ease}.music-btn:hover{transform:scale(1.08);background:#ffffff29}.music-btn svg{width:22px;height:22px}.music-btn .icon-off{display:none}.music-btn.is-muted{color:#888}.music-btn.is-muted .icon-on{display:none}.music-btn.is-muted .icon-off{display:block}.challenge-app-shell{position:relative;z-index:1;min-height:100vh;min-height:100dvh;display:grid;place-items:start center;padding:clamp(80px,9vh,96px) clamp(16px,2.4vw,32px) clamp(48px,6vh,64px)}.challenge-stage-overlay .stage,.challenge-page .stage{width:min(1180px,100%);display:flex;flex-direction:column;gap:clamp(14px,1.6vw,22px)}.challenge-stage-overlay .quiz-stage,.challenge-page .quiz-stage{min-height:auto;justify-content:flex-start}.start-card,.timer-card,.progress-pill,.question-card,.result-card,.challenge-scope-card{border:.5px solid rgba(255,255,255,.08);background:#ffffff0a;box-shadow:inset 0 1px #ffffff0f,0 8px 28px #00000059;backdrop-filter:blur(24px) saturate(1.5);-webkit-backdrop-filter:blur(24px) saturate(1.5)}.start-card{position:relative;width:min(860px,100%);margin:auto;padding:clamp(36px,6vw,64px) clamp(24px,4vw,48px);border-radius:32px;text-align:center}.start-title{position:relative;margin:0 0 16px;color:#fff;font-size:clamp(32px,4.6vw,60px);font-weight:950;line-height:1.1;letter-spacing:-.02em;text-shadow:0 18px 42px rgba(200,241,53,.18);animation:titleGlowGreen .9s ease-out 1.4s forwards}@keyframes titleGlowGreen{0%{text-shadow:0 18px 42px rgba(200,241,53,.18)}to{text-shadow:0 0 8px rgba(200,241,53,.8),0 0 24px rgba(200,241,53,.6),0 0 60px rgba(200,241,53,.35),0 18px 42px rgba(200,241,53,.2)}}.start-copy{max-width:680px;margin:0 auto 30px;color:#aaa;font-size:clamp(16px,1.8vw,22px);line-height:1.55}.challenge-scope-card{max-width:660px;margin:0 auto;padding:24px 28px;border-radius:24px;text-align:left;display:grid;gap:18px}.scope-row{display:grid;grid-template-columns:90px 1fr;align-items:center;gap:14px}.scope-label{font-size:13px;font-weight:700;color:#c8f135;letter-spacing:.05em;text-transform:uppercase}.scope-options{display:flex;flex-wrap:wrap;gap:8px}.scope-chip{padding:6px 14px;border-radius:999px;border:.5px solid rgba(255,255,255,.15);background:#ffffff0d;color:#ddd;font-size:13px;font-weight:600;cursor:pointer;transition:all .15s ease}.scope-chip:hover{background:#ffffff1f;border-color:#ffffff4d}.scope-chip.active{background:#c8f135;border-color:#c8f135;color:#111;font-weight:750;box-shadow:0 0 16px #c8f13566}.scope-row-versions{grid-template-columns:110px 1fr;align-items:flex-start}.scope-label-wrap{display:flex;flex-direction:column;gap:6px}.scope-actions{display:flex;gap:4px}.scope-action-btn{background:transparent;border:.5px solid rgba(255,255,255,.2);border-radius:6px;color:#aaa;font-size:11px;padding:2px 6px;cursor:pointer;transition:all .15s ease}.scope-action-btn:hover{border-color:#c8f135;color:#c8f135}.scope-summary{padding-top:10px;border-top:.5px solid rgba(255,255,255,.08);font-size:13px;color:#888;display:flex;justify-content:flex-end;align-items:center;gap:6px}.scope-summary strong{color:#c8f135;font-size:16px}.sparkle-button{position:relative;display:inline-flex}.nav-btn{--cut: .1em;--active: 0;--btn-bg: radial-gradient( 40% 50% at center 100%, hsl(78 calc(var(--active) * 98%) 75% / var(--active)), transparent ), radial-gradient( 80% 100% at center 120%, hsl(78 calc(var(--active) * 98%) 70% / var(--active)), transparent ), hsl(78 0% 16%);border:0;cursor:pointer;padding:.85em 1.7em;border-radius:999px;font-size:15px;font-weight:800;font-family:inherit;position:relative;isolation:isolate;background:var(--btn-bg);box-shadow:0 0 calc(var(--active) * 3em) -1em #c9fd4ecc;transition:box-shadow .25s,transform .2s ease;display:inline-flex;align-items:center;gap:.5em}.nav-btn:hover:not(:disabled){--active: 1;transform:translateY(-2px)}.nav-btn:disabled{opacity:.35;cursor:not-allowed}.primary-start-btn{font-size:19px;padding:.9em 2.2em;--btn-bg: #c8f135;box-shadow:0 0 28px #c8f13573}.primary-start-btn .nav-text{color:#111!important;font-weight:900}.nav-spark{position:absolute;inset:0;border-radius:999px;rotate:0deg;overflow:hidden;-webkit-mask:linear-gradient(white,transparent 50%);mask:linear-gradient(white,transparent 50%);animation:nav-spark-rotate 2s linear infinite}.nav-spark:after{content:"";position:absolute;inset:var(--cut);border-radius:999px}@keyframes nav-spark-rotate{to{rotate:360deg}}.nav-backdrop{position:absolute;inset:var(--cut);background:var(--btn-bg);border-radius:999px;transition:background .25s}.nav-text{letter-spacing:.02em;color:#fff;position:relative;z-index:1}.nav-particle-pen{position:absolute;width:200%;aspect-ratio:1;top:50%;left:50%;translate:-50% -50%;-webkit-mask:radial-gradient(white,transparent 65%);mask:radial-gradient(white,transparent 65%);z-index:-1;opacity:var(--active, 0);transition:opacity .25s;pointer-events:none}.nav-particle{width:calc(var(--size, .25) * 1rem);aspect-ratio:1;position:absolute;top:calc(var(--y) * 1%);left:calc(var(--x) * 1%);opacity:var(--alpha, 1);animation:nav-particle-float calc(var(--duration, 1) * 1s) calc(var(--delay) * -1s) infinite linear;transform-origin:var(--origin-x, 1000%) var(--origin-y, 1000%);z-index:-1}.nav-particle path{fill:#c8f135}@keyframes nav-particle-float{to{rotate:360deg}}.quiz-header{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}.timer-card{--timer-progress: 0;--timer-progress-angle: 0deg;--timer-ring: rgba(200, 241, 53, .95);--timer-ring-fade: rgba(200, 241, 53, .45);--timer-ring-soft: rgba(200, 241, 53, .12);position:relative;isolation:isolate;overflow:hidden;min-width:190px;padding:12px 18px 14px;border-radius:20px}.timer-card:before{position:absolute;inset:0;border-radius:inherit;content:"";pointer-events:none;z-index:0;padding:2px;background:conic-gradient(from -90deg,var(--timer-ring) 0 calc(var(--timer-progress-angle) - 10deg),var(--timer-ring-fade) calc(var(--timer-progress-angle) - 3deg),var(--timer-ring-soft) calc(var(--timer-progress-angle) + 9deg) 1turn);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude}.timer-card>*{position:relative;z-index:1}.timer-label{color:#888;font-size:12px;font-weight:800;letter-spacing:.05em;text-transform:uppercase}.timer-value{display:flex;align-items:center;gap:2px;margin-top:4px;font-family:var(--font-mono, monospace)}.flip-digit{position:relative;display:inline-flex;align-items:center;justify-content:center;overflow:hidden;width:clamp(26px,3.2vw,42px);height:clamp(40px,4.8vw,56px);font-size:clamp(34px,4vw,50px);font-weight:900;font-variant-numeric:tabular-nums;color:#f0f0f0;line-height:1}.flip-colon{font-size:clamp(30px,3.6vw,44px);font-weight:900;color:#f0f0f0;line-height:1;margin-bottom:2px}.numeric-digit-current,.numeric-digit-old,.numeric-digit-new{display:block;font:inherit}.numeric-digit-old,.numeric-digit-new{position:absolute;inset:0;display:grid;place-items:center}.numeric-digit-old{animation:numeric-text-old .38s cubic-bezier(.2,.8,.2,1) both}.numeric-digit-new{animation:numeric-text-new .38s cubic-bezier(.2,.8,.2,1) both}@keyframes numeric-text-old{0%{opacity:1;transform:translateY(0)}to{opacity:0;transform:translateY(50%)}}@keyframes numeric-text-new{0%{opacity:0;transform:translateY(-50%)}to{opacity:1;transform:translateY(0)}}.timer-value.is-hot{color:#ff5f8d}.timer-value.is-hot .flip-digit,.timer-value.is-hot .flip-colon{color:#ff5f8d;animation:pulse .8s ease-in-out infinite alternate}.nav-buttons{display:flex;gap:10px;align-items:center}.progress-pill{display:inline-flex;align-items:center;gap:10px;padding:12px 22px;border-radius:999px;font-size:clamp(15px,1.8vw,22px);font-weight:850;color:#fff}.progress-pill span{width:9px;height:9px;border-radius:50%;background:#c8f135;box-shadow:0 0 14px #c8f135}.question-card{position:relative;overflow:hidden;width:100%;display:grid;gap:14px;padding:clamp(20px,2.6vw,32px);border-radius:26px;text-align:left}.eyebrow{width:fit-content;display:inline-flex;padding:6px 14px;border-radius:999px;border:.5px solid rgba(200,241,53,.4);background:#c8f1351f;color:#c8f135;font-size:12px;font-weight:850;letter-spacing:.08em}.eyebrow-link{color:inherit;text-decoration:none;display:inline-flex;align-items:center;gap:4px;transition:opacity .18s ease}.eyebrow-link:hover{text-decoration:underline;opacity:.85}.question-title{margin:0;color:#fff;font-size:clamp(20px,2.4vw,32px);font-weight:900;line-height:1.35;letter-spacing:-.01em}.question-title code,.result-question code{font-family:var(--font-mono, "DM Mono", monospace);font-size:.88em;font-weight:700;color:#c8f135;background:#c8f1351f;border:.5px solid rgba(200,241,53,.4);border-radius:6px;padding:2px 7px;margin:0 3px;display:inline-block;vertical-align:baseline;line-height:1.3}.question-title strong,.result-question strong{color:#c8f135;font-weight:850}.code-block{width:100%;margin:0;padding:14px 18px;border:.5px solid rgba(255,255,255,.1);border-radius:16px;background:#0a0810eb;color:#fff;font-family:var(--font-mono, monospace);font-size:clamp(14px,1.35vw,18px);font-weight:500;line-height:1.6;white-space:pre-wrap;overflow-wrap:anywhere;max-height:min(48vh,420px);overflow-y:auto;overflow-x:auto}.code-keyword{color:#c8f135;font-weight:750}.code-string{color:#ff8fa3}.code-type{color:#79c0ff}.code-muted{color:#889}.choices-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.choice-tile{position:relative;overflow:hidden;min-height:64px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:14px;padding:12px 18px;border:.5px solid rgba(255,255,255,.1);border-radius:20px;color:#fff;cursor:pointer;background:#ffffff0d;backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);box-shadow:0 8px 24px #0000004d;text-align:left;transition:transform .15s ease,background .15s ease,border-color .15s ease}.choice-tile:hover{transform:translateY(-3px);border-color:#c8f13599;background:#ffffff17}.choice-label{width:44px;height:44px;display:grid;place-items:center;border-radius:14px;font-size:22px;font-weight:900;line-height:1;color:#fff}.choice-tile.choice-a .choice-label{background:linear-gradient(135deg,#2766d8,#2454bd)}.choice-tile.choice-b .choice-label{background:linear-gradient(135deg,#389657,#2d7a46)}.choice-tile.choice-c .choice-label{background:linear-gradient(135deg,#e09d21,#b57a12)}.choice-tile.choice-d .choice-label{background:linear-gradient(135deg,#de416c,#ba2650)}.choice-text{overflow-wrap:anywhere;font-size:clamp(15px,1.45vw,20px);font-weight:700;line-height:1.35}.choice-state{width:44px;height:44px;display:grid;place-items:center;flex-shrink:0}.choice-tile.correct{background:#c8f135!important;border-color:#c8f135!important;color:#111!important;box-shadow:0 0 24px #c8f13580!important}.choice-tile.correct .choice-text{color:#111}.choice-tile.correct .choice-label{background:#111;color:#fff}.choice-tile.wrong{background:#b4284659!important;border-color:#ff5f8d!important}.result-shell{width:min(1000px,100%);margin:0 auto}.result-header{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:24px;flex-wrap:wrap}.result-title{margin:0;color:#fff;font-size:clamp(30px,4vw,52px);font-weight:900;letter-spacing:-.02em}.result-score-badge{display:inline-flex;align-items:center;gap:8px;padding:10px 22px;border-radius:999px;background:#c8f13526;border:1px solid #c8f135;color:#c8f135;font-size:20px;font-weight:900}.result-list{display:grid;gap:18px}.result-card{padding:clamp(18px,2.4vw,28px);border-radius:22px;text-align:left}.result-meta{display:flex;justify-content:space-between;gap:14px;margin-bottom:12px;color:#aaa;font-size:14px;font-weight:800}.result-meta span:first-child{color:#c8f135}.result-question{margin:0 0 14px;color:#fff;font-size:clamp(16px,1.7vw,22px);font-weight:800;line-height:1.45}.result-user-answer{margin:0 0 6px;font-size:15px;font-weight:700}.result-user-answer.is-correct{color:#58ba70}.result-user-answer.is-wrong{color:#ff5f8d}.result-answer{margin:0 0 10px;color:#c8f135;font-size:clamp(16px,1.7vw,21px);font-weight:900}.result-user-answer code,.result-answer code,.result-reason code{font-family:var(--font-mono, "DM Mono", monospace);font-size:.88em;font-weight:700;border-radius:6px;padding:2px 7px;margin:0 3px;display:inline-block;vertical-align:baseline;line-height:1.3}.result-answer code{color:#c8f135;background:#c8f13524;border:.5px solid rgba(200,241,53,.45)}.result-user-answer.is-wrong code{color:#ff5f8d;background:#ff5f8d24;border:.5px solid rgba(255,95,141,.45)}.result-user-answer.is-correct code{color:#58ba70;background:#58ba7024;border:.5px solid rgba(88,186,112,.45)}.result-reason code{color:#c8f135;background:#c8f1351f;border:.5px solid rgba(200,241,53,.4)}.result-reason{margin:0 0 16px;color:#d0d0d0;font-size:clamp(14px,1.4vw,16px);line-height:1.7}.result-reason p{margin:0 0 10px}.result-reason p:last-child{margin-bottom:0}.result-reason ol,.result-reason ul{list-style:none;padding:0;margin:12px 0;display:flex;flex-direction:column;gap:8px}.result-reason li{position:relative;display:flex;align-items:flex-start;gap:10px;padding:2px 0;line-height:1.65;color:#e0e0e0}.result-reason ol{counter-reset:reason-counter}.result-reason ol>li{counter-increment:reason-counter}.result-reason ol>li:before{content:counter(reason-counter);flex-shrink:0;display:inline-grid;place-items:center;width:22px;height:22px;margin-top:2px;border-radius:6px;background:#c8f1352e;border:.5px solid rgba(200,241,53,.5);color:#c8f135;font-family:var(--font-mono, monospace);font-size:11px;font-weight:850;line-height:1}.result-reason ul>li:before{content:"";flex-shrink:0;width:7px;height:7px;margin-top:9px;border-radius:50%;background:#c8f135;box-shadow:0 0 8px #c8f13599}.result-reason li code{color:#c8f135;background:#c8f1351f;border:.5px solid rgba(200,241,53,.4);border-radius:6px;padding:1px 6px;margin:0 2px;font-family:var(--font-mono, monospace);font-size:.88em}.result-reason li strong{color:#fff;font-weight:750}.quiz-reason{margin-top:14px;padding:14px 16px;border-radius:8px;background:#f59e0b14;border:1px solid rgba(217,119,6,.25);border-left:4px solid #d97706;color:var(--ink);font-size:var(--text-sm);line-height:1.7}[data-theme=dark] .quiz-reason{background:#f59e0b24;border-color:#f59e0b59;border-left-color:#f59e0b}.quiz-reason-title{display:flex;align-items:center;gap:6px;font-weight:700;font-size:var(--text-sm);color:#b45309;margin-bottom:8px;letter-spacing:.02em}[data-theme=dark] .quiz-reason-title{color:#fbbf24}.quiz-reason-body{color:var(--ink)}.quiz-reason p{margin:0 0 8px;color:var(--ink)}.quiz-reason p:last-child{margin-bottom:0}.quiz-reason code{color:#92400e;background:#f59e0b26;border:1px solid rgba(217,119,6,.3);border-radius:4px;padding:.15em .4em;font-family:var(--font-mono, monospace);font-size:.88em}[data-theme=dark] .quiz-reason code{color:#fde68a;background:#f59e0b40;border-color:#f59e0b66}.quiz-reason strong{color:var(--ink);font-weight:700}.quiz-reason ol,.quiz-reason ul{padding-left:20px;margin:8px 0;display:flex;flex-direction:column;gap:6px}.quiz-reason li{line-height:1.65;color:var(--ink)}.result-links{display:flex;flex-wrap:wrap;gap:10px}.result-link{display:inline-flex;align-items:center;padding:7px 16px;border-radius:999px;border:.5px solid rgba(200,241,53,.4);background:#c8f1351a;color:#fff;font-size:13px;font-weight:750;text-decoration:none;transition:all .15s ease}.result-link:hover{background:#c8f13538;border-color:#c8f135;color:#c8f135;transform:translateY(-1px)}.result-meta-link,.result-meta-title-link{color:#c8f135;text-decoration:none;transition:opacity .15s ease}.result-meta-link:hover,.result-meta-title-link:hover{text-decoration:underline;opacity:.85}.challenge-stage-overlay .toast{position:fixed;z-index:2200;left:50%;bottom:30px;max-width:min(800px,calc(100vw - 32px));transform:translate(-50%) translateY(80px);opacity:0;padding:14px 28px;border:.5px solid rgba(200,241,53,.35);border-radius:999px;background:#12140ef0;color:#fff;font-size:15px;font-weight:750;box-shadow:0 12px 36px #0009;pointer-events:none;transition:transform .24s ease,opacity .24s ease}.challenge-stage-overlay .toast.show{transform:translate(-50%) translateY(0);opacity:1}.title-star{display:inline-block;margin-left:.25em;color:#ffd000;vertical-align:middle;opacity:0;animation:letterPullUp .55s cubic-bezier(.22,1,.36,1) 1s forwards}.title-star svg{height:.65em;width:auto}.spark-1{transform-origin:24px 26px;animation:starTwinkle 2.8s ease-in-out 1.8s infinite}.spark-2{transform-origin:40px 54px;animation:starTwinkle 2.8s ease-in-out 2.9s infinite}.spark-3{transform-origin:72px 40px;animation:starTwinkle 2.8s ease-in-out 1.2s infinite}@keyframes starTwinkle{0%,to{transform:scale(1);opacity:1}30%{transform:scale(.3);opacity:.1}55%{transform:scale(1.25);opacity:1;filter:drop-shadow(0 0 8px rgba(255,210,0,.9))}72%{transform:scale(.95);opacity:.95}84%{transform:scale(1.06);opacity:1}}.letter-up{display:inline-block;opacity:0;animation:letterPullUp .5s cubic-bezier(.22,1,.36,1) forwards}@keyframes letterPullUp{0%{transform:translateY(50%);opacity:0}to{transform:translateY(0);opacity:1}}@media(max-width:780px){.choices-grid{grid-template-columns:1fr}.quiz-header{flex-direction:column;align-items:stretch}.nav-buttons{justify-content:center}.scope-row{grid-template-columns:1fr;gap:8px}.scope-label-wrap{flex-direction:row;justify-content:space-between;align-items:center}}.sidebar-links{display:flex;flex-direction:column;gap:8px;margin-top:12px}.sidebar-plan-link{display:inline-flex;align-items:center;gap:6px;font-size:var(--text-xs);font-weight:600;color:var(--accent);text-decoration:none;padding:6px 10px;background:var(--accent-wash);border-radius:4px;border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);transition:filter .15s}.sidebar-plan-link:hover{filter:brightness(.95)}.onboarding-page{max-width:860px;margin:32px auto 80px;padding:0 16px}.onboarding-card{background:var(--sheet);border:1px solid var(--line);border-radius:8px;padding:40px;box-shadow:var(--shadow)}.onboarding-header{margin-bottom:32px}.onboarding-kicker{font:var(--text-xs) var(--font-mono);letter-spacing:.15em;color:var(--accent);text-transform:uppercase;display:block;margin-bottom:8px}.onboarding-header h1{font:600 var(--text-xl)/1.25 var(--font-serif);margin:0 0 12px}.onboarding-deck{color:var(--muted);font-size:var(--text-base);margin:0;max-width:680px}.preset-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:36px}.preset-card{background:var(--paper);border:1.5px solid var(--line);border-radius:6px;padding:20px;cursor:pointer;transition:all .2s ease;outline:none;display:flex;flex-direction:column}.preset-card:hover{border-color:var(--muted);transform:translateY(-2px)}.preset-card.is-selected{border-color:var(--accent);background:var(--accent-wash);box-shadow:0 0 0 2px color-mix(in srgb,var(--accent) 25%,transparent)}.preset-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.preset-title{margin:0;font:600 var(--text-base) var(--font-sans);color:var(--ink)}.preset-tag{font:var(--text-xs) var(--font-mono);padding:2px 8px;border-radius:3px;background:var(--soft);color:var(--muted)}.preset-tag-recommended{background:var(--accent);color:#fff;font-weight:600}.preset-desc{font-size:var(--text-sm);color:var(--ink);margin:0 0 14px;line-height:1.5;flex-grow:1}.preset-detail{display:flex;flex-direction:column;gap:4px;border-top:1px dashed var(--line);padding-top:10px}.preset-detail-item{font-size:var(--text-xs);color:var(--muted)}.preset-card.is-selected .preset-detail-item{color:var(--ink)}.onboarding-footer{display:flex;align-items:center;gap:20px;padding-top:12px;border-top:1px solid var(--line)}.onboarding-submit{padding:12px 24px;font-size:var(--text-base);font-weight:600;border-radius:6px}.onboarding-skip-link{font-size:var(--text-sm);color:var(--muted);text-decoration:underline;text-underline-offset:3px}.onboarding-skip-link:hover{color:var(--ink)}.plan-page{max-width:960px;margin:24px auto 120px;padding:0 16px}.plan-header{background:var(--sheet);border:1px solid var(--line);border-radius:8px;padding:28px;margin-bottom:24px;box-shadow:var(--shadow)}.plan-header-top{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:10px}.plan-kicker{font:var(--text-xs) var(--font-mono);color:var(--accent);letter-spacing:.15em;text-transform:uppercase;display:block;margin-bottom:6px}.plan-header h1{font:600 var(--text-xl)/1.2 var(--font-serif);margin:0}.plan-rechoose-preset{font-size:var(--text-xs);color:var(--muted);text-decoration:none;padding:6px 12px;border:1px solid var(--line);border-radius:4px;background:var(--paper);white-space:nowrap}.plan-rechoose-preset:hover{border-color:var(--accent);color:var(--accent)}.plan-deck{color:var(--muted);font-size:var(--text-sm);margin:0 0 20px}.plan-summary-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:24px;padding:16px;background:var(--paper);border-radius:6px;border:1px solid var(--line)}.plan-metric{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center}.plan-metric .metric-num{font:700 var(--text-xl) var(--font-mono);color:var(--ink);line-height:1}.plan-metric .metric-label{font-size:var(--text-xs);color:var(--muted);margin-top:6px}.plan-metric.metric-unread .metric-num{color:var(--accent)}.plan-metric.metric-skipped .metric-num{color:var(--muted)}.plan-metric.metric-learned .metric-num{color:var(--green)}.plan-toolbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.plan-search-wrap{flex:1;display:flex;align-items:center;position:relative}.plan-search-wrap span{position:absolute;left:12px;color:var(--muted);pointer-events:none}.plan-search-wrap input{width:100%;padding:9px 12px 9px 34px;background:var(--sheet);border:1px solid var(--line);border-radius:4px;font-size:var(--text-sm);color:var(--ink)}.plan-search-wrap input:focus{outline:none;border-color:var(--accent)}.plan-view-controls{display:flex;gap:6px}.btn-plan-tool{background:var(--paper);border:1px solid var(--line);padding:7px 12px;font-size:var(--text-xs);border-radius:4px;color:var(--muted)}.btn-plan-tool:hover{color:var(--ink);border-color:var(--muted)}.plan-groups-container{display:flex;flex-direction:column;gap:16px}.plan-group{background:var(--sheet);border:1px solid var(--line);border-radius:6px;overflow:hidden;box-shadow:0 2px 8px #0001}.plan-group-header{display:flex;align-items:center;justify-content:space-between;background:var(--paper);border-bottom:1px solid var(--line);padding:8px 14px;user-select:none}.plan-group.is-collapsed .plan-group-header{border-bottom:0}.plan-group-title-btn{display:flex;align-items:center;gap:10px;background:none;border:none;padding:4px 0;text-align:left;cursor:pointer;color:var(--ink);flex:1}.group-arrow{font-size:var(--text-xs);color:var(--muted);width:16px}.group-title-text{font:600 var(--text-base) var(--font-sans)}.group-total-count{font-size:var(--text-xs);color:var(--muted)}.group-counts{display:flex;gap:6px;margin-left:8px}.count-badge{font:var(--text-xs) var(--font-mono);padding:2px 6px;border-radius:3px;border:1px solid var(--line)}.count-unread{background:var(--sheet);color:var(--accent)}.count-skipped{background:var(--soft);color:var(--muted)}.count-learned{background:var(--sheet);color:var(--green)}.plan-group-actions{display:flex;gap:6px}.btn-group-action{font-size:var(--text-xs);padding:4px 8px;background:var(--sheet);border:1px solid var(--line);border-radius:3px;color:var(--ink)}.btn-group-action:hover{border-color:var(--accent);color:var(--accent)}.plan-group-body{padding:4px 0}.plan-empty-filter{padding:20px;text-align:center;color:var(--muted);font-size:var(--text-sm)}.plan-item{display:grid;grid-template-columns:24px 72px 1fr auto auto;align-items:center;gap:12px;padding:8px 14px;border-bottom:1px solid color-mix(in srgb,var(--line) 40%,transparent);transition:background .15s ease}.plan-item:last-child{border-bottom:none}.plan-item:hover{background:color-mix(in srgb,var(--paper) 60%,var(--sheet))}.plan-item.status-is-skipped{opacity:.65}.plan-item-checkbox-wrap{display:flex;align-items:center;cursor:pointer}.plan-item-checkbox-wrap input{cursor:pointer;width:16px;height:16px}.plan-item-id{font:500 var(--text-xs) var(--font-mono);color:var(--muted)}.plan-item-main{min-width:0}.plan-item-title{color:var(--ink);text-decoration:none;font-size:var(--text-sm);font-weight:500;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.plan-item-title:hover{color:var(--accent);text-decoration:underline}.plan-version-badge{font:var(--text-xs) var(--font-mono);color:var(--muted);background:var(--soft);padding:2px 7px;border-radius:3px;white-space:nowrap}.plan-status-pill{display:inline-flex;align-items:center;gap:5px;padding:4px 9px;border-radius:4px;font:var(--text-xs) var(--font-mono);border:1px solid var(--line);background:var(--sheet);cursor:pointer;user-select:none;transition:all .15s ease;white-space:nowrap}.plan-status-pill .pill-mark{font-weight:700}.plan-status-pill.status-unread{color:var(--accent);border-color:color-mix(in srgb,var(--accent) 40%,var(--line));background:var(--sheet)}.plan-status-pill.status-unread:hover{background:var(--accent-wash)}.plan-status-pill.status-skipped{color:var(--muted);border-color:var(--line);background:var(--soft)}.plan-status-pill.status-skipped:hover{filter:brightness(.95)}.plan-status-pill.status-learned{color:var(--green);border-color:color-mix(in srgb,var(--green) 40%,var(--line));background:var(--sheet)}.plan-status-pill.status-learned:hover{background:color-mix(in srgb,var(--green) 15%,var(--sheet))}.plan-batch-bar{position:fixed;bottom:84px;left:50%;transform:translate(-50%);background:var(--sheet);border:1px solid var(--accent);border-radius:30px;box-shadow:0 12px 36px #0004;padding:8px 18px;display:flex;align-items:center;gap:16px;z-index:1001;animation:batchSlideUp .25s cubic-bezier(.16,1,.3,1)}@keyframes batchSlideUp{0%{opacity:0;transform:translate(-50%,20px)}to{opacity:1;transform:translate(-50%)}}.batch-bar-count{font-size:var(--text-sm);color:var(--ink)}.batch-bar-count strong{color:var(--accent)}.batch-bar-btns{display:flex;align-items:center;gap:8px}.btn-batch{padding:6px 12px;font-size:var(--text-xs);background:var(--paper);border:1px solid var(--line);border-radius:4px;color:var(--ink);font-weight:500}.btn-batch:hover{border-color:var(--accent);color:var(--accent)}.btn-batch-clear{padding:6px 12px;font-size:var(--text-xs);background:none;border:none;color:var(--muted);cursor:pointer;text-decoration:underline}.btn-batch-clear:hover{color:var(--ink)}.plan-sticky-footer{position:fixed;bottom:0;left:0;right:0;background:var(--sheet);border-top:1px solid var(--line);padding:12px 4vw;display:flex;align-items:center;justify-content:space-between;gap:16px;z-index:990;box-shadow:0 -4px 16px #0001}.plan-footer-info{font-size:var(--text-sm);color:var(--ink)}.plan-footer-info strong{color:var(--accent)}.btn-plan-confirm{padding:10px 22px;font-size:var(--text-sm);font-weight:600;border-radius:6px}.plan-conflict-modal{width:min(480px,calc(100vw - 32px));border-radius:12px}.plan-conflict-body{padding-top:16px;display:flex;flex-direction:column;gap:16px}.plan-conflict-message{margin:0;font-size:var(--text-sm);color:var(--ink);line-height:1.6}.plan-conflict-actions{display:flex;flex-direction:column;gap:8px}.btn-conflict-preserve{padding:10px 16px;background:var(--ink);color:var(--sheet);border:1px solid var(--ink);border-radius:6px;font-size:var(--text-sm);font-weight:600;cursor:pointer;text-align:center;transition:opacity .15s ease}.btn-conflict-preserve:hover{opacity:.9}.btn-conflict-overwrite{padding:9px 16px;background:var(--accent-wash);color:var(--accent);border:1px solid var(--accent);border-radius:6px;font-size:var(--text-sm);font-weight:500;cursor:pointer;text-align:center;transition:background .15s ease}.btn-conflict-overwrite:hover{background:color-mix(in srgb,var(--accent) 22%,var(--sheet))}.btn-conflict-cancel{padding:8px 16px;background:transparent;color:var(--muted);border:1px solid var(--line);border-radius:6px;font-size:var(--text-sm);cursor:pointer;text-align:center;transition:color .15s ease,border-color .15s ease}.btn-conflict-cancel:hover{color:var(--ink);border-color:var(--ink)}@media(max-width:780px){.preset-cards{grid-template-columns:1fr}.plan-summary-bar{grid-template-columns:repeat(2,1fr)}.plan-item{grid-template-columns:20px 60px 1fr auto}.plan-version-badge{display:none}.plan-batch-bar{flex-direction:column;width:calc(100% - 32px);border-radius:12px;gap:8px;bottom:96px}}