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var(--line);background:var(--bg);height:72px;z-index:var(--z-sticky);justify-content:space-between;align-items:center;gap:20px;padding:0 44px;display:flex;position:sticky;top:0}.breadcrumb{color:var(--muted);align-items:center;gap:12px;min-width:0;font-size:13px;display:flex}.breadcrumb>button:not(.icon-button){color:var(--muted);white-space:nowrap;background:0 0;padding:0}.breadcrumb>button:hover{color:var(--primary)}.breadcrumb>span{color:var(--ink);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.topbar-right{flex-shrink:0;align-items:center;gap:20px;display:flex}.edition{color:var(--muted);font-size:12px}.edition>span{color:var(--line);padding:0 8px}.reader-badge{color:var(--muted);border-left:1px solid var(--line);align-items:center;gap:6px;padding-left:19px;font-size:12px;display:flex}.reading-layout{grid-template-columns:minmax(0,730px) 180px;gap:60px;max-width:1110px;margin:0 auto;padding:52px 44px 70px;display:grid}.lesson{min-width:0}.chapter-kicker{color:var(--muted);align-items:center;gap:13px;font-size:12px;display:flex}.chapter-kicker>span:first-child{color:var(--primary);background:var(--tint);border-radius:4px;padding:3px 9px;font-weight:550}.done-badge{color:var(--primary);align-items:center;gap:4px;margin-left:auto;display:flex}.intro{color:var(--muted);margin:0 0 22px;font-size:16px;line-height:1.9}.lesson-meta{color:var(--muted);border-bottom:1px solid var(--line);flex-wrap:wrap;gap:21px;padding-bottom:27px;font-size:12px;display:flex}.lesson-meta>span,.lesson-meta>button{align-items:center;gap:6px;display:flex}.lesson-meta>button{color:var(--primary);background:0 0;margin-left:auto;padding:0;font-size:12px}.bridge{background:var(--tint);color:var(--ink);border-radius:9px;gap:15px;margin:28px 0 37px;padding:21px 23px;display:flex}.bridge-icon{color:var(--primary);padding-top:2px}.bridge strong{color:var(--primary);font-size:14px;font-weight:600}.bridge p{color:var(--muted);margin:5px 0 0;font-size:14px;line-height:1.85}.knowledge-map{margin:0 0 44px;scroll-margin-top:105px}.knowledge-heading{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-end;gap:20px;padding-bottom:15px;display:flex}.knowledge-heading small{color:var(--primary);font-weight:620}.knowledge-heading h2{margin:4px 0 0;font-size:1.45rem}.knowledge-heading>span{color:var(--muted);flex-shrink:0;font-size:12px}.knowledge-grid{grid-template-columns:repeat(2,minmax(0,1fr));display:grid}.knowledge-grid>div{border-bottom:1px solid var(--line);min-width:0;padding:18px 20px 19px 0}.knowledge-grid>div:nth-child(2n){border-left:1px solid var(--line);padding-left:20px;padding-right:0}.knowledge-grid strong{color:var(--ink);margin-bottom:5px;font-size:15px;font-weight:630;display:block}.knowledge-grid p{color:var(--muted);margin:0;font-size:14px;line-height:1.75}.type-reference{margin:0 0 44px;scroll-margin-top:105px}.type-reference>h2{margin:11px 0}.type-reference>p{margin:0 0 18px;line-height:1.9}.type-table-scroll{border:1px solid var(--line);border-radius:var(--radius);overflow-x:auto}.type-table-scroll:focus-visible{outline:3px solid var(--primary);outline-offset:3px}.type-table-scroll table{border-collapse:collapse;width:100%;min-width:670px;font-size:13px}.type-table-scroll th,.type-table-scroll td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:11px 13px}.type-table-scroll th{color:var(--muted);background:var(--surface);font-size:11px;font-weight:620}.type-table-scroll tbody tr:last-child td{border-bottom:0}.type-table-scroll td:first-child code{color:var(--primary);font-weight:650}.type-table-scroll td:nth-child(2){color:var(--muted);white-space:nowrap}.type-table-scroll td:nth-child(3) code{white-space:nowrap}.section-body{scroll-margin-top:105px}.section-body>p{margin:14px 0;font-size:16px;line-height:1.95}.flow{background:var(--surface);border-radius:9px;justify-content:space-between;align-items:center;gap:8px;margin:25px 0;padding:24px 28px;display:flex}.flow>span{text-align:center;color:var(--primary);font-family:ui-monospace,monospace;font-size:15px;font-weight:550}.flow small{color:var(--muted);margin-top:5px;font-family:inherit;font-size:11px;font-weight:400;display:block}.flow svg{width:16px;color:var(--muted)}.code-block{border-radius:var(--radius);background:var(--code);color:var(--code-ink);border:1px solid var(--code-line);margin:23px 0 30px;overflow:hidden}.code-title{border-bottom:1px solid var(--code-line);color:var(--muted);justify-content:space-between;align-items:center;gap:12px;padding:10px 16px;font:12px/1.5 ui-monospace,monospace;display:flex}.code-title>span{overflow-wrap:anywhere;align-items:center;gap:8px;min-width:0;display:flex}.copy-button{color:var(--muted);background:0 0;border-radius:4px;flex-shrink:0;align-items:center;gap:5px;padding:4px 7px;font-size:11px;display:flex}.copy-button:hover{background:var(--tint);color:var(--primary)}pre{tab-size:4;margin:0;padding:23px;font:13px/1.95 SFMono-Regular,Consolas,monospace;overflow-x:auto}code{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.syntax-keyword{color:var(--primary);font-weight:550}.syntax-string{color:var(--success)}.syntax-comment{color:var(--muted)}.code-footer{border-top:1px solid var(--code-line);color:var(--muted);justify-content:space-between;gap:12px;padding:7px 16px;font:11px/1.7 ui-monospace,monospace;display:flex}.code-footer span{font-family:inherit;font-size:10px}.primary-button{background:var(--primary);color:var(--on-primary);white-space:nowrap;border-radius:7px;justify-content:center;align-items:center;gap:9px;padding:11px 18px;font-size:14px;font-weight:550;display:inline-flex}.primary-button:hover{background:var(--primary-hover)}.contents{align-self:start;padding-top:8px;font-size:12px;position:sticky;top:116px}.contents>div:first-child{margin-bottom:16px;font-weight:600}.contents>button{text-align:left;width:100%;color:var(--muted);background:0 0;padding:7px 0;font-size:12px;line-height:1.6;display:block}.contents>button:hover{color:var(--primary)}.project-note{border-top:1px solid var(--line);color:var(--muted);margin-top:25px;padding-top:25px}.project-note svg{color:var(--primary);margin-bottom:12px}.project-note strong{color:var(--ink);font-size:12px;display:block}.project-note p{margin:10px 0;font-size:12px;line-height:1.9}.project-note>span{color:var(--primary);font-size:11px;line-height:1.9;display:block}.week-note{color:var(--muted);margin-top:28px;font-size:11px}.week-note>button{color:var(--muted);background:0 0;align-items:center;gap:5px;padding:6px 0;font-size:11px;display:flex}.week-note>button:hover{color:var(--primary)}.practice{background:var(--surface);border-radius:var(--radius);margin-top:44px;padding:28px}.practice-heading{align-items:center;gap:15px;display:flex}.practice-icon{background:var(--tint);width:42px;height:42px;color:var(--primary);border-radius:8px;place-items:center;display:grid}.practice-heading small{color:var(--muted);font-size:12px}.practice-heading h2{margin:5px 0 0;font-size:17px}.practice ol{margin:23px 0;padding-left:22px;list-style:decimal}.practice li{margin:11px 0;padding-left:5px;font-size:14px;line-height:1.9}.practice li::marker{color:var(--primary);font-size:12px}.hint{margin:18px 0 24px}.hint summary{color:var(--primary);cursor:pointer;align-items:center;gap:10px;font-size:13px;list-style:none;display:flex}.hint summary::-webkit-details-marker{display:none}.hint summary svg{transition:transform .18s}.hint[open] summary svg{transform:rotate(180deg)}.hint p{color:var(--muted);margin:12px 0;font-size:14px;line-height:1.9}.criteria-title{border-top:1px solid var(--line);align-items:center;gap:7px;padding-top:20px;font-size:13px;font-weight:600;display:flex}.criteria-title>span{color:var(--muted);margin-left:auto;font-size:12px;font-weight:400}.criteria{flex-direction:column;gap:13px;margin-top:16px;display:flex}.criteria label{cursor:pointer;align-items:flex-start;gap:10px;font-size:14px;display:flex}.criteria input{accent-color:var(--primary);flex-shrink:0;width:16px;height:16px;margin:5px 0 0}.criteria input:checked+span{color:var(--muted)}.quiz{margin:42px 0}.section-label{color:var(--muted);align-items:center;gap:8px;font-size:13px;display:flex}.quiz h2{margin:13px 0 22px;font-size:18px}.quiz-options{flex-direction:column;gap:10px;display:flex}.quiz-option{text-align:left;border:1px solid var(--line);background:var(--bg);width:100%;color:var(--ink);border-radius:7px;align-items:center;gap:13px;padding:14px 17px;font-size:14px;display:flex}.quiz-option>span{color:var(--muted);font:12px ui-monospace,monospace}.quiz-option>svg{margin-left:auto}.quiz-option:hover{background:var(--surface)}.quiz-option.correct{border-color:var(--primary);color:var(--primary);background:var(--tint)}.quiz-option.incorrect{border-color:var(--danger);color:var(--danger)}.quiz-feedback{background:var(--surface);border-radius:7px;margin-top:14px;padding:17px 20px;font-size:14px}.quiz-feedback strong{color:var(--primary);font-size:13px}.quiz-feedback p{color:var(--muted);margin:6px 0 0;line-height:1.85}.notes{margin:40px 0}.notes label{align-items:center;gap:8px;margin-bottom:14px;font-size:14px;font-weight:550;display:flex}.notes label>span{color:var(--muted);margin-left:auto;font-size:11px;font-weight:400}.notes textarea{border:1px solid var(--line);background:var(--bg);resize:vertical;width:100%;min-height:125px;color:var(--ink);border-radius:8px;padding:17px 19px;font-size:14px;line-height:1.9;display:block}.notes textarea::placeholder{color:var(--muted);opacity:1}.resources h2{margin-bottom:9px;font-size:17px}.resources>p{color:var(--muted);margin:0 0 16px;font-size:13px}.resources>a,.resource-link{color:var(--primary);align-items:center;gap:9px;padding:9px 0;font-size:14px;display:flex}.resources>a>svg:last-child{margin-left:auto}.resources>a:hover,.resource-link:hover{text-underline-offset:4px;text-decoration:underline}.finish-row{border-top:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;margin-top:38px;padding-top:29px;display:flex}.finish-row strong{font-size:14px;font-weight:550}.finish-row p{color:var(--muted);margin:6px 0 0;font-size:12px}.completed-button{background:var(--tint);color:var(--primary)}.completed-button:hover{background:var(--surface)}.chapter-pagination{grid-template-columns:1fr 1fr;gap:20px;margin-top:36px;display:grid}.chapter-pagination>button{text-align:left;color:var(--ink);background:0 0;align-items:center;gap:12px;padding:16px 0;font-size:13px;line-height:1.6;display:flex}.chapter-pagination>button:hover{color:var(--primary)}.chapter-pagination small{color:var(--muted);margin-bottom:5px;font-size:11px;display:block}.chapter-pagination .pagination-next{text-align:right;justify-content:flex-end}.site-footer{border-top:1px solid var(--line);max-width:1022px;color:var(--muted);align-items:center;gap:20px;margin:0 auto;padding:23px 44px;font-size:11px;display:flex}.site-footer>span:first-child{color:var(--ink);font-size:12px;font-weight:600}.site-footer>button{color:var(--muted);background:0 0;align-items:center;gap:6px;margin-left:auto;font-size:11px;display:flex}.toast{background:var(--ink);color:var(--bg);z-index:var(--z-toast);border-radius:8px;align-items:center;gap:9px;width:max-content;max-width:calc(100vw - 32px);padding:12px 18px;font-size:13px;display:flex;position:fixed;bottom:28px;left:calc(50% + 120px);transform:translate(-50%)}.storage-warning{background:var(--tint);color:var(--ink);padding:12px 30px;font-size:13px}.skip-link{z-index:var(--z-skip);background:var(--primary);color:var(--on-primary);padding:8px 15px;position:fixed;top:-100px;left:20px}.skip-link:focus{top:10px}.icon-button{color:var(--ink);background:0 0;border-radius:6px;place-items:center;width:38px;height:38px;display:grid}.icon-button:hover{background:var(--tint)}.mobile-menu{display:none}.mobile-dialog{border:0;border-right:1px solid var(--line);background:var(--surface);width:min(330px,90vw);max-width:90vw;height:100dvh;max-height:100dvh;color:var(--ink);margin:0;padding:30px 17px 22px}.mobile-dialog[open]{flex-direction:column;display:flex}.mobile-dialog::backdrop{background:lab(3.00549% -.429377 -4.60005/.38)}.dialog-close{position:absolute;top:6px;right:6px}.mobile-dialog .brand{margin-top:20px}.roadmap{max-width:970px;margin:auto;padding:52px 44px 65px}.roadmap h1{font-size:2.35rem}.plan-summary{color:var(--muted);flex-wrap:wrap;gap:28px;padding:2px 0 26px;font-size:13px;display:flex}.plan-summary>span{align-items:center;gap:7px;display:flex}.plan-start{background:var(--tint);border-radius:10px;justify-content:space-between;align-items:center;gap:22px;margin:0 0 46px;padding:23px 25px;display:flex}.plan-start strong{font-size:15px;font-weight:550}.plan-start p{color:var(--muted);margin:6px 0 0;font-size:13px}.roadmap-track{position:relative}.roadmap-track:before{content:"";background:var(--line);width:1px;position:absolute;top:24px;bottom:35px;left:21px}.roadmap-phase{grid-template-columns:44px minmax(0,1fr);gap:25px;padding-bottom:39px;display:grid;position:relative}.phase-index{border:1px solid var(--line);background:var(--bg);width:44px;height:44px;color:var(--muted);border-radius:50%;place-items:center;font-size:13px;font-weight:550;display:grid}.phase-index.finished{background:var(--tint);color:var(--primary);border-color:var(--tint)}.phase-top{color:var(--muted);justify-content:space-between;gap:12px;margin-top:3px;font-size:11px;display:flex}.phase-content h2{margin:10px 0 8px;font-size:21px}.phase-content>p{color:var(--muted);margin:0 0 18px;font-size:14px}.roadmap-lessons{grid-template-columns:1fr 1fr;gap:8px 18px;display:grid}.roadmap-lessons>button{text-align:left;color:var(--ink);background:0 0;align-items:center;gap:9px;padding:10px 0;font-size:13px;display:flex}.roadmap-lessons>button:hover{color:var(--primary)}.roadmap-lessons>button>span{color:var(--muted);font-family:ui-monospace,monospace;font-size:11px}.roadmap-lessons>button>svg{color:var(--muted);margin-left:auto}.deliverable{color:var(--muted);border-top:1px solid var(--line);align-items:flex-start;gap:7px;margin-top:16px;padding-top:15px;font-size:12px;display:flex}.deliverable svg{color:var(--primary);margin-top:3px}.study-rhythm{border-top:1px solid var(--line);margin-top:10px;padding-top:3px}.study-rhythm h2{margin-top:25px;font-size:20px}.study-rhythm p{color:var(--muted);font-size:14px;line-height:1.95}.page-transition{min-height:calc(100dvh - 145px)}@media (min-width:1600px){.reading-layout,.roadmap{padding-top:66px}}@media (max-width:1279px){.landing-nav,.landing-hero{padding-inline:40px}.landing-copy h1{font-size:clamp(2.6rem,4vw,3.15rem)}.reading-layout{grid-template-columns:minmax(0,1fr) 160px;gap:36px;padding-left:34px;padding-right:34px}.sidebar{width:260px}.workspace{margin-left:260px}.topbar{padding:0 34px}.reader-badge{display:none}.lesson-meta{gap:14px}}@media (max-width:1099px){.reading-layout{grid-template-columns:minmax(0,1fr);max-width:810px;padding:43px 40px 60px}.contents{display:none}.lesson-meta>button{margin-left:auto}.roadmap{padding:43px 36px}.roadmap-lessons{grid-template-columns:1fr}.roadmap h1{font-size:2rem}.plan-start{flex-direction:column;align-items:flex-start}.roadmap-phase{gap:18px}}@media (max-width:899px){.landing-shell{overflow:visible}.landing-hero{min-height:650px;padding-top:48px}.landing-copy{max-width:540px;transform:translateY(-20px)}.landing-copy h1{white-space:normal;max-width:540px}}@media (max-width:767px){.landing-shell{grid-template-rows:68px minmax(0,1fr)}.landing-nav{height:68px;padding:0 20px}.landing-brand .brand-mark{border-radius:8px;width:34px;height:34px}.landing-brand strong{font-size:17px}.landing-edition{font-size:12px}.landing-edition i{width:18px}.landing-main .page-transition{min-height:calc(100dvh - 68px)}.landing-hero{align-items:flex-start;min-height:900px;padding:42px 22px 300px}.landing-copy{transform:none}.landing-copy h1{margin-block:17px 18px;font-size:clamp(2.65rem,13vw,3.4rem);line-height:1.13}.landing-copy>p{font-size:15px;line-height:1.85}.landing-actions{flex-direction:column;align-items:flex-start;gap:13px;margin-top:27px}.landing-actions>span{white-space:normal;max-width:none}.landing-visual:before{background:linear-gradient(180deg, var(--bg) 0%, var(--bg) 42%, var(--bg) 55%, transparent 72%)}@supports (color:color-mix(in lab, red, red)){.landing-visual:before{background:linear-gradient(180deg, var(--bg) 0%, var(--bg) 42%, color-mix(in oklch, var(--bg) 82%, transparent) 55%, transparent 72%)}}.landing-visual img{object-position:center bottom;width:100%;height:auto;inset:auto 0 64px}.hero-transfer-map{margin-top:22px}.hero-transfer-map>div{grid-template-columns:1fr 18px 1fr;gap:10px;padding:12px 0}.hero-transfer-map span,.sidebar{display:none}.workspace{margin-left:0}.topbar{gap:10px;height:64px;padding:0 16px}.mobile-menu{margin-left:-6px;display:grid}.breadcrumb{gap:9px;font-size:12px}.topbar-right{gap:0;display:flex}.topbar-right .edition,.topbar-right .reader-badge{display:none}.reading-layout{gap:0;padding:30px 22px 44px}h1{font-size:1.9rem}.intro{font-size:15px}.flow{padding:20px 15px}.bridge{margin:25px 0 32px;padding:20px}.knowledge-map{margin-bottom:38px}.knowledge-heading{align-items:flex-start}.knowledge-heading h2{font-size:1.3rem}.knowledge-grid{grid-template-columns:1fr}.knowledge-grid>div,.knowledge-grid>div:nth-child(2n){border-left:0;padding:16px 0}.knowledge-grid p{font-size:14px}.lesson-meta{gap:13px;font-size:11px}.lesson-meta>button{font-size:11px}.section-body>p{font-size:15px}pre{padding:18px;font-size:12px}.code-footer span{display:none}.practice{padding:22px 20px}.practice-heading h2{font-size:16px}.practice-icon{display:none}.finish-row{flex-direction:column;align-items:flex-start}.chapter-pagination{gap:16px}.chapter-pagination>button{font-size:12px}.notes label>span{font-size:10px}.site-footer{gap:15px;padding:22px}.site-footer>span:nth-child(2){display:none}.toast{bottom:18px;left:50%}.roadmap{padding:30px 22px 45px}.roadmap h1{font-size:1.8rem}.plan-summary{gap:15px;font-size:12px}.plan-start{padding:20px}.roadmap-phase{grid-template-columns:34px minmax(0,1fr);gap:15px}.phase-index{width:34px;height:34px;font-size:11px}.roadmap-track:before{left:16px}.phase-content h2{font-size:20px}.phase-top{font-size:10px}.roadmap-lessons{gap:2px}.storage-warning{padding:12px 22px}}@media (prefers-reduced-motion:reduce){body,.theme-toggle{transition:none}.theme-toggle:hover{transform:none}}@media (max-width:380px){.landing-edition{display:none}.landing-nav-right{gap:0}.lesson-meta>button{margin-left:0}.reading-layout{padding-left:18px;padding-right:18px}.breadcrumb{gap:6px}.brand strong span{font-size:10px}.notes label{flex-wrap:wrap}.notes label>span{width:100%;margin-left:0}}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}.page-transition{transform:none!important}}fieldset.quiz-options{border:0;margin:0;padding:0}.quiz-feedback,.storage-warning{display:block}.quiz-feedback>span{color:var(--muted);margin:6px 0 0;line-height:1.85;display:block}@property --tw-blur{syntax:"*";inherits:false}@property --tw-brightness{syntax:"*";inherits:false}@property --tw-contrast{syntax:"*";inherits:false}@property --tw-grayscale{syntax:"*";inherits:false}@property --tw-hue-rotate{syntax:"*";inherits:false}@property --tw-invert{syntax:"*";inherits:false}@property --tw-opacity{syntax:"*";inherits:false}@property --tw-saturate{syntax:"*";inherits:false}@property --tw-sepia{syntax:"*";inherits:false}@property --tw-drop-shadow{syntax:"*";inherits:false}@property --tw-drop-shadow-color{syntax:"*";inherits:false}@property --tw-drop-shadow-alpha{syntax:"<percentage>";inherits:false;initial-value:100%}@property --tw-drop-shadow-size{syntax:"*";inherits:false}