:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;font-synthesis:none;text-rendering:optimizelegibility;--mono:"Fira Code", "SFMono-Regular", Consolas, monospace;font-family:Fira Sans,Avenir Next,Avenir,system-ui,sans-serif}:root[data-theme=light]{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--page:#f4f0e8;--surface:#fffcf7;--surface-raised:#fffefa;--surface-soft:#eee7dc;--surface-tint:#f8f3ea;--text:#333230;--text-strong:#20242d;--muted:#62646a;--soft:#6f6d68;--faint:#99958e;--line:#e4ddd2;--line-strong:#cfc4b5;--accent:#b84420;--accent-strong:#963b1e;--accent-ink:#984321;--accent-soft:#f3e3d8;--accent-pale:#faf0e8;--rust:#b84420;--accent-on-solid:#fffaf3;--brand-mark:#1e2650;--code:#171e32;--code-top:#202a43;--code-line:#38445c;--code-text:#f2f1ea;--code-muted:#a7b2c6;--quiz:#fffcf7;--correct:#edf2e8;--correct-line:#b4c3a7;--incorrect:#f8eae5;--incorrect-line:#dea995;--shadow:0 18px 48px #392d2317}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--page:#141821;--surface:#1b202b;--surface-raised:#222937;--surface-soft:#252d3c;--surface-tint:#1f2633;--text:#d9dde3;--text-strong:#f7f4ed;--muted:#adb5c0;--soft:#929ba8;--faint:#788391;--line:#303847;--line-strong:#414c5d;--accent:#ed8b61;--accent-strong:#f2a17d;--accent-ink:#f0a17b;--accent-soft:#382a2a;--accent-pale:#2a2428;--rust:#ed8b61;--accent-on-solid:#201a1b;--brand-mark:#d34516;--code:#101521;--code-top:#181f2d;--code-line:#2d374a;--code-text:#e9eaf0;--code-muted:#9ba8bc;--quiz:#1d2430;--correct:#27312c;--correct-line:#54685b;--incorrect:#382827;--incorrect-line:#805349;--shadow:0 22px 55px #00000040}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--page);min-width:320px;min-height:100%}body{background:var(--page);min-width:320px;min-height:100vh;color:var(--text);margin:0;transition:background-color .2s,color .2s}button,input{font:inherit}button,a{color:inherit}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--rust);outline-offset:3px}::selection{color:var(--text-strong);background:var(--accent-soft)}.app-shell{background:var(--page);min-height:100vh;color:var(--text)}.icon-button{border:1px solid var(--line);width:36px;height:36px;color:var(--muted);background:var(--surface);cursor:pointer;border-radius:8px;flex:none;place-items:center;transition:background .15s,border-color .15s,color .15s;display:inline-grid}.icon-button:hover{color:var(--accent);border-color:var(--line-strong);background:var(--surface-soft)}.topbar{z-index:30;border-bottom:1px solid var(--line);background:color-mix(in srgb, var(--surface) 94%, transparent);-webkit-backdrop-filter:blur(15px);backdrop-filter:blur(15px);grid-template-columns:258px minmax(0,1fr) 258px;align-items:center;height:68px;padding:0 36px;display:grid;position:sticky;top:0}.brand{align-items:center;gap:10px;width:fit-content;text-decoration:none;display:inline-flex}.brand-mark{color:#fffaf3;background:var(--brand-mark);border-radius:10px 10px 10px 3px;place-items:center;width:33px;height:33px;display:grid;transform:rotate(-3deg)}.brand-mark svg{transform:rotate(3deg)}.brand-name{color:var(--text-strong);letter-spacing:-.035em;align-items:baseline;gap:5px;font-size:14px;font-weight:750;display:flex}.brand-name span{color:var(--muted);font-size:12px;font-weight:500}.topbar-center{min-width:0;color:var(--muted);text-overflow:ellipsis;white-space:nowrap;justify-self:center;align-items:center;gap:11px;font-size:11px;display:flex;overflow:hidden}.topbar-center>span:last-child{text-overflow:ellipsis;overflow:hidden}.topbar-center>span:first-child{color:var(--accent);font-family:var(--mono);letter-spacing:.09em;font-size:9px}.crumb-divider{color:var(--faint)}.topbar-actions{justify-self:end;align-items:center;gap:10px;display:flex}.top-progress-label{color:var(--soft);font-family:var(--mono);padding-right:4px;font-size:10px}.top-progress-label span{color:var(--accent)}.mobile-menu-button{display:none}.layout{grid-template-columns:258px minmax(0,1fr) 238px;column-gap:clamp(32px,4.5vw,72px);width:min(100%,1640px);min-height:calc(100vh - 68px);margin:0 auto;padding:0 36px;display:grid}.sidebar{overscroll-behavior:contain;scrollbar-width:thin;scrollbar-color:var(--line-strong) transparent;border-right:1px solid var(--line);align-self:start;height:calc(100dvh - 68px);min-height:calc(100vh - 68px);padding:26px 14px 84px 0;position:sticky;top:68px;overflow-y:auto}.sidebar-heading{justify-content:space-between;align-items:center;padding-right:17px;display:flex}.sidebar-heading>div{gap:5px;display:grid}.sidebar-kicker,.rail-label,.page-kicker,.lesson-kicker{color:var(--soft);font-family:var(--mono);letter-spacing:.095em;font-size:9px;font-weight:500}.sidebar-heading strong{color:var(--text-strong);font-size:13px;font-weight:650}.sidebar-count{color:var(--soft);font-size:10px}.resume-card{border:1px solid var(--line);width:calc(100% - 16px);color:var(--muted);background:var(--surface-raised);text-align:left;cursor:pointer;border-radius:8px;grid-template-columns:27px minmax(0,1fr) 15px;align-items:center;gap:9px;margin:19px 16px 18px 0;padding:10px;display:grid}.resume-card:hover{border-color:var(--line-strong);background:var(--surface-soft)}.resume-icon{width:27px;height:27px;color:var(--accent);background:var(--accent-soft);border-radius:7px;place-items:center;display:grid}.resume-card>span:nth-child(2){gap:4px;min-width:0;display:grid}.resume-card small{color:var(--soft);font-family:var(--mono);letter-spacing:.06em;font-size:7px}.resume-card strong{color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:10px;font-weight:600;overflow:hidden}.resume-card>svg{color:var(--accent)}.overall-progress{margin:0 17px 20px 0}.overall-progress-label{color:var(--muted);justify-content:space-between;margin-bottom:8px;font-size:10px;display:flex}.overall-progress-label strong{color:var(--accent);font-family:var(--mono);font-size:9px;font-weight:500}.progress-track,.mini-progress{background:var(--line);border-radius:99px;width:100%;height:4px;overflow:hidden}.progress-track>span,.mini-progress>span{border-radius:inherit;background:var(--accent);height:100%;transition:width .35s;display:block}.overall-progress p{color:var(--soft);margin:7px 0 0;font-size:9px}.sidebar-shortcuts{border-top:1px solid var(--line);border-bottom:1px solid var(--line);gap:2px;margin:0 16px 15px 0;padding:9px 0;display:grid}.sidebar-shortcuts button{min-height:32px;color:var(--muted);text-align:left;cursor:pointer;background:0 0;border:0;border-radius:5px;align-items:center;gap:9px;padding:0 8px;font-size:11px;display:flex}.sidebar-shortcuts button:hover,.sidebar-shortcuts button.shortcut-active{color:var(--accent-strong);background:var(--accent-soft)}.sidebar-shortcuts button>span{color:var(--soft);font-family:var(--mono);margin-left:auto;font-size:9px}.search-box{border:1px solid var(--line);min-height:36px;color:var(--soft);background:var(--surface-raised);border-radius:6px;align-items:center;gap:7px;margin:0 16px 15px 0;padding:0 9px;display:flex}.search-box:focus-within{border-color:var(--accent)}.search-box input{width:100%;min-width:0;height:34px;color:var(--text);background:0 0;border:0;outline:0;font-size:10px}.search-box input::placeholder{color:var(--soft)}.search-box button{color:var(--soft);cursor:pointer;background:0 0;border:0;place-items:center;padding:2px;display:grid}.curriculum{padding-right:11px}.curriculum-unit{margin-bottom:3px}.unit-toggle{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:6px;grid-template-columns:25px minmax(0,1fr) 17px;align-items:center;gap:8px;width:100%;min-height:45px;padding:6px 4px 6px 0;display:grid}.unit-toggle:hover{background:var(--surface-soft)}.unit-status{border:1px solid var(--line-strong);width:22px;height:22px;color:var(--soft);font-family:var(--mono);border-radius:6px 6px 6px 2px;place-items:center;font-size:8px;display:grid}.unit-status.status-current{color:var(--accent-on-solid);border-color:var(--accent);background:var(--accent)}.unit-status.status-done{color:var(--accent);border-color:var(--line-strong);background:var(--accent-soft)}.unit-title-wrap{gap:4px;min-width:0;display:grid}.unit-title{color:var(--text);font-size:11px;font-weight:600;line-height:1.35}.unit-meta{color:var(--soft);font-size:9px}.unit-chevron{color:var(--faint);justify-self:end}.lesson-list{border-left:1px solid var(--line-strong);margin:1px 0 8px 11px;padding:1px 0 4px 11px}.lesson-link{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:5px;grid-template-columns:13px minmax(0,1fr) auto;align-items:center;gap:7px;width:100%;min-height:34px;padding:5px 3px 5px 0;display:grid}.lesson-link:hover{background:var(--surface-soft)}.lesson-link-title{color:var(--muted);font-size:10px;line-height:1.4}.lesson-active .lesson-link-title{color:var(--accent-strong);font-weight:700}.lesson-indicator{border:1px solid var(--line-strong);width:10px;height:10px;color:var(--surface);border-radius:50%;place-items:center;display:grid}.lesson-active .lesson-indicator{border:2px solid var(--accent);width:11px;height:11px}.lesson-indicator.lesson-done{border-color:var(--accent);width:13px;height:13px;color:var(--page);background:var(--accent)}.lesson-duration{color:var(--soft);font-family:var(--mono);white-space:nowrap;font-size:8px}.unit-review-link,.unit-download{width:100%;min-height:30px;color:var(--accent);text-align:left;cursor:pointer;background:0 0;border:0;border-radius:5px;align-items:center;gap:7px;padding:5px 4px;font-size:9px;display:flex}.unit-review-link:hover,.unit-download:hover{background:var(--accent-soft)}.unit-review-link span{color:var(--soft);margin-left:auto;font-size:8px}.unit-download{color:var(--muted)}.sidebar-foot{border-top:1px solid var(--line);color:var(--soft);background:var(--page);align-items:center;gap:9px;margin:18px 16px 0 0;padding:12px 0 3px;font-size:9px;line-height:1.5;display:flex;position:sticky;bottom:-68px}.sidebar-foot-mark{width:27px;height:27px;color:var(--accent);background:var(--accent-soft);border-radius:7px 7px 7px 2px;place-items:center;display:grid}.search-results{gap:3px;display:grid}.search-result{text-align:left;cursor:pointer;background:0 0;border:0;border-radius:5px;grid-template-columns:14px 1fr 15px;align-items:center;gap:8px;width:100%;padding:8px 6px;display:grid}.search-result:hover{background:var(--surface-soft)}.search-result>span:nth-child(2){gap:4px;display:grid}.search-result strong{color:var(--text);font-size:10px;font-weight:600}.search-result small,.empty-search{color:var(--soft);font-size:9px}.search-result>svg{color:var(--faint)}.empty-search{padding:0 5px;line-height:1.6}.mobile-scrim{display:none}.main-content{flex-direction:column;min-width:0;min-height:calc(100vh - 68px);padding-top:29px;display:flex}.lesson-topline{width:100%;color:var(--soft);justify-content:space-between;align-items:center;gap:16px;font-size:10px;display:flex}.breadcrumb-soft{color:var(--accent);font-weight:700}.breadcrumb-slash{color:var(--faint);padding:0 8px}.reading-time{white-space:nowrap;align-items:center;gap:6px;display:flex}.lesson-article{width:100%;max-width:760px;margin:38px auto 0}.lesson-title-row{justify-content:space-between;align-items:center;gap:18px;display:flex}.lesson-title-row>div{min-width:0}.lesson-kicker{color:var(--accent);margin:0 0 11px;font-size:9px}.lesson-article h1,.page-content h1{color:var(--text-strong);letter-spacing:-.055em;margin:0;font-size:clamp(37px,4vw,52px);font-weight:650;line-height:1.08}.lesson-subtitle{max-width:640px;color:var(--muted);margin:14px 0 0;font-size:16px;line-height:1.65}.bookmark-button{width:40px;height:40px}.bookmark-button.is-saved{color:var(--accent);border-color:var(--line-strong);background:var(--accent-soft)}.lesson-byline{color:var(--soft);flex-wrap:wrap;align-items:center;gap:8px;margin-top:19px;font-size:10px;display:flex}.byline-avatar{border:1px solid var(--line);width:23px;height:23px;color:var(--accent);background:var(--accent-soft);border-radius:7px 7px 7px 2px;place-items:center;display:grid}.byline-dot{color:var(--faint)}.article-rule{background:var(--line);height:1px;margin:22px 0 24px}.learning-goal{border:1px solid var(--line);border-left:3px solid var(--accent);background:var(--surface-soft);color:var(--accent);border-radius:6px 9px 9px 6px;grid-template-columns:22px 1fr;align-items:start;gap:11px;margin:0 0 25px;padding:15px 17px;display:grid}.learning-goal p{gap:5px;margin:0;display:grid}.learning-goal strong{color:var(--accent-strong);font-size:11px}.learning-goal span{color:var(--muted);font-size:12px;line-height:1.6}.article-body{color:var(--text)}.article-paragraph{color:var(--text);margin:0 0 18px;font-size:16px;line-height:1.88}.article-paragraph a{color:var(--accent);-webkit-text-decoration-color:var(--line-strong);text-decoration-color:var(--line-strong);text-underline-offset:3px;align-items:baseline;gap:2px;font-weight:600;display:inline-flex}.article-paragraph a svg{color:var(--rust);position:relative;top:2px}.inline-code{color:var(--accent-strong);background:var(--accent-soft);font-family:var(--mono);border-radius:4px;padding:2px 5px;font-size:.85em}.concept-diagram{border:1px solid var(--line);background:var(--surface-tint);border-radius:8px;margin:26px 0 27px;padding:17px 18px}.concept-diagram figcaption{color:var(--muted);margin-bottom:14px;font-size:11px;font-weight:650}.diagram-steps{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.diagram-step{border:1px solid var(--line);background:var(--surface);border-radius:6px;flex:95px;align-content:center;gap:4px;min-height:48px;padding:8px;display:grid}.diagram-step span{color:var(--soft);font-family:var(--mono);font-size:8px}.diagram-step strong{color:var(--text);font-size:10px;font-weight:600}.diagram-arrow{color:var(--accent);flex:none}.code-block{border:1px solid var(--code-line);background:var(--code);border-radius:8px;margin:22px 0 23px;overflow:hidden;box-shadow:0 5px 14px #0b140e14}.code-top{border-bottom:1px solid var(--code-line);min-height:41px;color:var(--code-muted);background:var(--code-top);justify-content:space-between;align-items:center;gap:12px;padding:0 13px;display:flex}.code-language,.code-actions,.code-actions button{align-items:center;gap:7px;display:flex}.code-language{color:var(--code-text);font-family:var(--mono);font-size:10px}.code-language svg{color:var(--rust)}.code-actions{gap:5px}.code-actions button{min-height:29px;color:var(--code-muted);cursor:pointer;background:0 0;border:0;border-radius:4px;padding:4px 6px;font-size:9px}.code-actions button:hover{color:var(--code-text);background:#ffffff14}.code-block pre{color:var(--code-text);font-family:var(--mono);tab-size:4;margin:0;padding:17px 19px 19px;font-size:12px;line-height:1.8;overflow-x:auto}.code-block code{font-family:inherit}.code-block .hljs-keyword,.code-block .hljs-literal,.code-block .hljs-meta{color:#efa18e}.code-block .hljs-string,.code-block .hljs-attr{color:#dfcc91}.code-block .hljs-number,.code-block .hljs-symbol{color:#e6ad75}.code-block .hljs-title,.code-block .hljs-title.function_,.code-block .hljs-function{color:#91c4db}.code-block .hljs-type,.code-block .hljs-built_in,.code-block .hljs-variable.language_{color:#9bc8b5}.code-block .hljs-comment{color:#929caf;font-style:italic}.code-block .hljs-punctuation,.code-block .hljs-operator{color:#d2d7e0}.terminal-block{border-color:var(--code-line)}.terminal-block .code-top{background:var(--code-top);border-color:var(--code-line)}.terminal-block .code-language svg{color:var(--rust)}.output-block{border:1px solid var(--line);background:var(--surface-tint);border-radius:7px;margin:17px 0 24px}.output-label{border-bottom:1px solid var(--line);color:var(--soft);font-family:var(--mono);letter-spacing:.06em;justify-content:space-between;padding:9px 12px;font-size:8px;display:flex}.output-status{color:var(--accent)}.output-block pre{color:var(--accent-ink);white-space:pre-wrap;font-family:var(--mono);margin:0;padding:13px 15px;font-size:11px;line-height:1.7}.lesson-terms{flex-wrap:wrap;align-items:center;gap:7px;margin:20px 0 27px;display:flex}.lesson-terms>span{width:100%;color:var(--soft);margin-bottom:2px;font-size:9px}.lesson-terms button,.terms-card button{border:1px solid var(--line);min-height:29px;color:var(--accent-ink);background:var(--surface);cursor:pointer;border-radius:99px;align-items:center;gap:6px;padding:5px 9px;font-size:10px;display:inline-flex}.lesson-terms button:hover,.terms-card button:hover{border-color:var(--accent);background:var(--accent-soft)}.quiz-block,.practice-block{border:1px solid var(--line);background:var(--quiz);border-radius:9px;margin:34px 0 28px;padding:22px 23px}.exercise-overline{color:var(--accent);font-family:var(--mono);letter-spacing:.08em;align-items:center;gap:7px;font-size:9px;display:flex}.quiz-block h2,.practice-block h2{color:var(--text-strong);letter-spacing:-.02em;margin:10px 0 15px;font-size:17px;font-weight:650;line-height:1.5}.quiz-options{gap:8px;display:grid}.quiz-option{border:1px solid var(--line);min-height:44px;color:var(--text);background:var(--surface);cursor:pointer;border-radius:6px;align-items:center;gap:10px;padding:9px 11px;font-size:12px;line-height:1.5;transition:background .14s,border-color .14s;display:flex;position:relative}.quiz-option:hover{border-color:var(--line-strong)}.quiz-option input{opacity:0;width:1px;height:1px;margin:0;position:absolute}.quiz-option:focus-within{outline:3px solid var(--rust);outline-offset:2px}.radio-dot{border:1px solid var(--line-strong);border-radius:50%;flex:none;place-items:center;width:15px;height:15px;display:grid}.quiz-selected{border-color:var(--accent);background:var(--accent-pale)}.quiz-selected .radio-dot{border-color:var(--accent)}.quiz-selected .radio-dot:after{content:"";background:var(--accent);border-radius:50%;width:7px;height:7px}.quiz-option.quiz-correct{border-color:var(--correct-line);background:var(--correct)}.quiz-option.quiz-incorrect{border-color:var(--incorrect-line);background:var(--incorrect)}.answer-mark{color:var(--accent);margin-left:auto}.quiz-footer,.review-submit{flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px;display:flex}.check-answer{min-height:38px;color:var(--page);background:var(--accent);cursor:pointer;border:0;border-radius:5px;align-items:center;gap:8px;padding:8px 12px;font-size:11px;font-weight:650;display:inline-flex}.check-answer:hover:not(:disabled){filter:brightness(1.08)}.check-answer:disabled{color:var(--soft);background:var(--line);cursor:not-allowed}.quiz-feedback{color:var(--rust);flex:240px;margin:0;font-size:11px;line-height:1.65}.feedback-correct{color:var(--accent)}.feedback-try{color:var(--rust)}.practice-block{border-color:var(--line);background:var(--surface-soft);padding:22px 23px 18px}.practice-block h2{margin-bottom:7px}.practice-block>p{color:var(--text);margin:0 0 16px;font-size:13px;line-height:1.75}.practice-block details{border-top:1px solid var(--line-strong)}.practice-block summary{min-height:43px;color:var(--accent-ink);cursor:pointer;justify-content:space-between;align-items:center;gap:8px;font-size:11px;font-weight:600;list-style:none;display:flex}.practice-block summary::-webkit-details-marker{display:none}.practice-block summary span{align-items:center;gap:7px;display:flex}.practice-block details[open] summary>svg:last-child{transform:rotate(180deg)}.practice-block details>p{color:var(--muted);margin:0 0 15px;font-size:12px;line-height:1.7}.end-note{border-top:1px solid var(--line);color:var(--muted);align-items:flex-start;gap:9px;margin:29px 0;padding:14px 0;font-size:12px;line-height:1.65;display:flex}.end-note svg{color:var(--accent);flex:none}.lesson-complete-box{border:1px solid var(--line);background:var(--surface-tint);border-radius:8px;grid-template-columns:29px 1fr auto;align-items:center;gap:12px;margin:32px 0 26px;padding:17px;display:grid}.complete-state{border-color:var(--line-strong);background:var(--accent-pale)}.complete-icon{width:28px;height:28px;color:var(--accent);background:var(--accent-soft);border-radius:7px 7px 7px 2px;place-items:center;display:grid}.lesson-complete-box h3{color:var(--text-strong);margin:0;font-size:12px;font-weight:650}.lesson-complete-box p{color:var(--soft);margin:4px 0 0;font-size:10px;line-height:1.5}.complete-button{border:1px solid var(--line-strong);min-height:37px;color:var(--accent-strong);background:var(--surface);cursor:pointer;border-radius:5px;padding:8px 12px;font-size:10px;font-weight:650}.complete-button:hover{background:var(--accent-soft)}.lesson-pagination{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:13px;margin:24px 0 39px;padding-top:17px;display:grid}.pagination-button{min-width:0;min-height:42px;color:var(--accent);text-align:left;cursor:pointer;background:0 0;border:0;align-items:center;gap:9px;padding:4px 0;display:flex}.pagination-button:disabled{color:var(--faint);cursor:default}.pagination-button>span{min-width:0}.pagination-next{text-align:right;justify-content:flex-end}.pagination-button small{color:var(--soft);font-family:var(--mono);letter-spacing:.05em;margin-bottom:4px;font-size:8px;display:block}.pagination-button strong{max-width:260px;color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:11px;font-weight:600;display:block;overflow:hidden}.site-footer{border-top:1px solid var(--line);color:var(--soft);justify-content:space-between;gap:14px;margin-top:auto;padding:15px 0 19px;font-size:9px;display:flex}.site-footer a{color:var(--accent);align-items:center;gap:4px;text-decoration:none;display:inline-flex}.right-rail{padding-top:139px}.rail-card{border:1px solid var(--line);background:var(--surface-tint);border-radius:8px;margin-bottom:13px;padding:15px}.rail-label{color:var(--soft);align-items:center;gap:6px;font-size:8px;line-height:1.5;display:flex}.rail-label svg{color:var(--accent)}.goal-card>p{color:var(--text);margin:11px 0 14px;font-size:11px;line-height:1.65}.rail-divider{background:var(--line);height:1px;margin:12px 0}.duration-value{color:var(--text);font-family:var(--mono);margin-top:7px;font-size:10px;font-weight:500;display:block}.mini-progress{height:4px;margin-top:9px}.mini-progress-note{color:var(--soft);margin-top:7px;font-size:9px;display:block}.terms-card{gap:7px;display:grid}.terms-card .rail-label{margin-bottom:3px}.terms-card button{border-radius:5px;justify-content:space-between;width:100%;min-height:31px}.rail-note{color:var(--accent);background:var(--accent-soft);border-radius:7px;grid-template-columns:20px 1fr;align-items:start;gap:9px;margin-top:14px;padding:13px;display:grid}.rail-note p{color:var(--muted);margin:0;font-size:10px;line-height:1.65}.page-content{width:100%;max-width:800px;margin:44px auto 60px}.page-kicker{color:var(--accent);margin:0 0 14px}.page-content h1{max-width:690px}.page-intro{max-width:660px;color:var(--muted);margin:16px 0 26px;font-size:16px;line-height:1.75}.overall-card{border:1px solid var(--line);background:var(--surface-tint);border-radius:8px;margin:24px 0 22px;padding:16px 18px}.overall-card-copy{color:var(--accent);align-items:center;gap:10px;margin-bottom:12px;display:flex}.overall-card-copy span{gap:3px;display:grid}.overall-card-copy strong{color:var(--text-strong);font-size:12px}.overall-card-copy small{color:var(--soft);font-size:10px}.program-list{border-top:1px solid var(--line)}.program-row{border-bottom:1px solid var(--line);grid-template-columns:34px minmax(0,1fr) auto;align-items:start;gap:13px;min-height:95px;padding:17px 3px;display:grid}.program-index{color:var(--accent);font-family:var(--mono);padding-top:2px;font-size:10px}.program-copy h2{color:var(--text-strong);margin:0;font-size:14px;font-weight:650}.program-copy p{color:var(--muted);margin:5px 0;font-size:11px;line-height:1.65}.program-copy small{color:var(--soft);font-size:9px}.program-actions{align-items:center;gap:7px;display:flex}.program-start{border:1px solid var(--line);min-height:34px;color:var(--accent-strong);background:var(--surface);cursor:pointer;border-radius:5px;align-items:center;gap:6px;padding:6px 9px;font-size:9px;font-weight:600;display:inline-flex}.program-start:hover{background:var(--accent-soft)}.program-actions .icon-button{width:33px;height:33px}.course-note{color:var(--accent);background:var(--accent-soft);border-radius:7px;align-items:flex-start;gap:10px;margin-top:24px;padding:15px;display:flex}.course-note p{color:var(--muted);margin:0;font-size:11px;line-height:1.65}.program-foot{color:var(--soft);margin-top:23px;font-size:11px;line-height:1.65}.back-to-lesson{color:var(--accent);cursor:pointer;background:0 0;border:0;align-items:center;gap:6px;margin:0 0 25px;padding:0;font-size:11px;font-weight:600;display:inline-flex}.review-passed{border:1px solid var(--correct-line);color:var(--accent);background:var(--correct);border-radius:6px;align-items:center;gap:8px;margin:17px 0;padding:12px 14px;font-size:11px;display:flex}.review-question-list{gap:13px;display:grid}.review-question{border:1px solid var(--line);background:var(--surface-tint);border-radius:8px;padding:18px}.review-source{color:var(--soft);font-family:var(--mono);letter-spacing:.06em;font-size:8px}.review-question h2{color:var(--text-strong);margin:8px 0 12px;font-size:14px;font-weight:650;line-height:1.5}.review-question .quiz-option{min-height:39px;margin-top:6px;font-size:11px}.review-explanation{color:var(--muted);margin:9px 0 0;font-size:10px;line-height:1.6}.review-explanation strong{color:var(--accent)}.review-submit{margin:17px 0 28px}.review-submit p{flex-basis:100%;margin:0;font-size:11px;line-height:1.6}.glossary-list{border-top:1px solid var(--line);margin-top:27px}.glossary-entry{border-bottom:1px solid var(--line);grid-template-columns:31px 1fr;gap:11px;padding:15px 8px;scroll-margin-top:90px;transition:background .2s;display:grid}.glossary-entry>span{color:var(--soft);font-family:var(--mono);padding-top:2px;font-size:9px}.glossary-entry h2{color:var(--accent-strong);font-family:var(--mono);margin:0;font-size:13px;font-weight:500}.glossary-entry p{color:var(--muted);margin:5px 0 0;font-size:12px;line-height:1.65}.glossary-entry.term-highlight{background:var(--accent-soft);border-radius:6px}.saved-list{border-top:1px solid var(--line);margin-top:25px}.saved-row{border-bottom:1px solid var(--line);grid-template-columns:1fr 40px;align-items:center;gap:8px;min-height:64px;display:grid}.saved-row>button:first-child{min-width:0;color:var(--accent);text-align:left;cursor:pointer;background:0 0;border:0;grid-template-columns:22px minmax(0,1fr) 16px;align-items:center;gap:9px;padding:10px 5px;display:grid}.saved-row>button:first-child>span{gap:4px;min-width:0;display:grid}.saved-row strong{color:var(--text);text-overflow:ellipsis;white-space:nowrap;font-size:12px;font-weight:600;overflow:hidden}.saved-row small{color:var(--soft);font-size:10px}.saved-row>.icon-button{justify-self:end}.empty-state{border:1px dashed var(--line-strong);color:var(--soft);text-align:center;border-radius:8px;justify-items:center;margin-top:28px;padding:30px 20px;display:grid}.empty-state>svg{color:var(--accent)}.empty-state h2{color:var(--text);margin:12px 0 4px;font-size:14px}.empty-state p{max-width:330px;color:var(--muted);margin:4px 0;font-size:11px;line-height:1.6}@media (width<=1190px){.topbar{grid-template-columns:230px minmax(0,1fr) 112px;padding:0 25px}.layout{grid-template-columns:230px minmax(0,1fr);column-gap:35px;padding:0 25px}.right-rail{display:none}.main-content{grid-column:2}}@media (width<=720px){.topbar{grid-template-columns:minmax(0,1fr) auto;gap:12px;height:59px;padding:0 16px}.brand-mark{width:30px;height:30px}.brand-name{font-size:13px}.topbar-center{display:none}.topbar-actions{gap:7px}.top-progress-label{display:none}.icon-button{width:35px;height:35px}.mobile-menu-button{display:inline-grid}.layout{min-height:calc(100vh - 59px);padding:0 18px;display:block}.mobile-scrim{z-index:39;background:#0d111a85;border:0;display:block;position:fixed;inset:59px 0 0}.sidebar{z-index:40;border-right:1px solid var(--line);background:var(--page);width:min(340px,89vw);height:calc(100dvh - 59px);min-height:0;box-shadow:var(--shadow);padding:21px 18px 24px;transition:transform .22s;position:fixed;top:59px;left:0;transform:translate(-105%)}.sidebar.sidebar-open{transform:translate(0)}.sidebar-heading{padding-right:3px}.resume-card,.overall-progress,.sidebar-shortcuts,.search-box{margin-right:0}.curriculum{padding-right:2px}.sidebar-foot{margin-top:20px;margin-right:0;position:static}.main-content{min-height:calc(100vh - 59px);padding-top:20px}.lesson-topline{font-size:9px}.lesson-article{margin-top:29px}.lesson-article h1,.page-content h1{font-size:clamp(35px,9.5vw,46px)}.lesson-subtitle,.page-intro{margin-top:12px;font-size:14px}.lesson-byline{margin-top:16px;font-size:9px}.article-rule{margin:18px 0 21px}.learning-goal{padding:13px}.learning-goal span{font-size:11px}.article-paragraph{font-size:15px;line-height:1.82}.code-block pre{padding:14px;font-size:11px}.code-actions button{justify-content:center;width:31px}.code-actions button span{display:none}.quiz-block,.practice-block{margin:26px 0 22px;padding:18px 15px}.quiz-block h2,.practice-block h2{font-size:15px}.quiz-option{min-height:43px;font-size:11px}.quiz-feedback{flex-basis:100%}.lesson-complete-box{grid-template-columns:28px minmax(0,1fr);gap:9px;padding:14px}.complete-button{grid-column:2;justify-self:start}.lesson-pagination{gap:7px}.pagination-button{gap:5px}.pagination-button strong{max-width:125px;font-size:9px}.pagination-button>svg{flex:none;width:14px}.page-content{margin-top:31px}.program-row{grid-template-columns:25px minmax(0,1fr);gap:8px}.program-actions{grid-column:2}.program-copy p{font-size:10px}.diagram-steps{grid-template-columns:1fr 18px 1fr;gap:7px;display:grid}.diagram-step{min-width:0}.diagram-arrow{justify-self:center;transform:rotate(90deg)}.site-footer{font-size:8px}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}
