.course-program{--course-ink: var(--paper);--course-muted: var(--muted);--course-line: var(--line);--course-accent: var(--ember);--course-surface: color-mix(in srgb, var(--coal) 92%, var(--paper) 8%);padding:clamp(36px,6vw,84px) 0 96px}.course-hero{display:grid;grid-template-columns:minmax(0,1fr) minmax(240px,.42fr);gap:clamp(32px,7vw,96px);align-items:end;border-bottom:1px solid var(--course-line);padding:48px 0 clamp(40px,7vw,88px)}.course-hero__index,.course-block__label,.course-meta dt,.course-rail__label{margin:0;color:var(--moss);font-family:Consolas,SFMono-Regular,monospace;font-size:.75rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase}.course-hero h1{max-width:14ch;margin-top:14px;font-size:clamp(3rem,8vw,7.4rem);line-height:.95}.course-hero__summary{margin:24px 0 0;max-width:48rem;color:var(--course-muted);font-size:clamp(1.05rem,2vw,1.3rem);line-height:1.75}.course-meta{display:grid;gap:18px;margin:0;border-left:1px solid var(--course-line);padding-left:clamp(20px,3vw,36px)}.course-meta div{display:grid;grid-template-columns:minmax(78px,.34fr) 1fr;gap:16px}.course-meta dd{margin:0;color:var(--course-ink);font-size:.95rem;font-weight:720;line-height:1.55}.course-layout{display:grid;grid-template-columns:minmax(190px,250px) minmax(0,760px);gap:clamp(42px,7vw,108px);align-items:start;justify-content:center;padding-top:clamp(40px,7vw,84px)}.course-rail{position:sticky;top:24px;max-height:calc(100dvh - 48px);overflow:auto;border-top:2px solid var(--course-ink);padding-top:16px}.course-rail ol{display:grid;gap:0;margin:14px 0 0;padding:0;list-style:none}.course-rail a{display:grid;grid-template-columns:2rem 1fr;gap:10px;align-items:baseline;border-top:1px solid var(--course-line);padding:12px 0;color:var(--course-muted);line-height:1.45;text-decoration:none}.course-rail a[aria-current=page]{color:var(--course-ink);font-weight:780}.course-rail a span:first-child{color:var(--course-accent);font-family:Consolas,SFMono-Regular,monospace;font-size:.74rem}.course-mobile-toc{display:none;margin-top:28px;border-block:1px solid var(--course-line);padding:12px 0}.course-mobile-toc summary{min-height:44px;cursor:pointer;font-weight:800;line-height:44px}.course-mobile-toc ol{display:grid;gap:10px;padding-left:1.5rem}.course-prose{min-width:0;color:var(--course-ink);font-size:1.04rem;line-height:1.86}.course-prose>:first-child{margin-top:0}.course-prose h2,.course-prose h3{scroll-margin-top:24px}.course-prose>h2{margin:3.5em 0 .8em;border-top:1px solid var(--course-line);padding-top:.65em;font-size:clamp(1.9rem,4vw,3rem);line-height:1.12}.course-prose>h3{margin:2.25em 0 .7em;font-size:1.35rem}.course-prose p,.course-prose ul,.course-prose ol{margin-block:1.1em}.course-prose li+li{margin-top:.45em}.course-prose code{border:1px solid var(--course-line);border-radius:3px;padding:.12em .35em;background:color-mix(in srgb,var(--course-surface) 88%,var(--course-accent) 12%);font-size:.9em}.course-prose pre{overflow:auto;border:1px solid var(--course-line);border-left:4px solid var(--moss);padding:18px;background:var(--course-surface);line-height:1.6}.course-prose pre code{border:0;padding:0;background:transparent}.course-block{position:relative;margin:clamp(32px,6vw,64px) 0;border-block:1px solid var(--course-line);padding:clamp(22px,4vw,36px) 0}.course-block h2,.course-block h3{margin:7px 0 0;color:var(--course-ink);font-size:clamp(1.35rem,3vw,2rem);line-height:1.2}.course-block__body>:last-child{margin-bottom:0}.course-block__heading{display:flex;gap:20px;align-items:flex-start;justify-content:space-between}.course-block__time{flex:none;border:1px solid var(--course-line);border-radius:999px;padding:5px 10px;color:var(--course-muted);font-size:.78rem;font-weight:800}.course-block--concept{border-top:4px solid var(--course-ink)}.course-block--analogy{margin-left:clamp(0px,5vw,54px);border-left:3px solid var(--moss);border-block-color:transparent;padding:8px 0 8px 24px}.course-block--checkpoint,.course-block--demo{border:1px solid var(--course-line);padding:clamp(22px,4vw,34px);background:color-mix(in srgb,var(--course-surface) 94%,var(--course-accent) 6%)}.course-block--checkpoint details,.course-block--instructor{margin-top:20px}.course-block--checkpoint summary,.course-block--instructor>summary{min-height:44px;cursor:pointer;color:var(--course-ink);font-weight:780}.course-block--exercise{border-top:6px double var(--course-accent)}.course-task-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:26px}.course-task-grid section{border-top:1px solid var(--course-line);padding-top:12px}.course-task-grid h3{font-size:1rem}.course-block--demo:before{position:absolute;top:-1px;bottom:-1px;left:-1px;width:4px;background:var(--course-accent);content:""}.course-block__reviewed{margin:24px 0 0;color:var(--course-muted);font-size:.78rem}.course-block--instructor{border:1px dashed var(--course-line);padding:18px 22px}.course-block--instructor>summary{display:grid;gap:4px}.course-navigation{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:72px;border-top:1px solid var(--course-line);padding-top:24px}.course-navigation a{min-height:72px;border:1px solid var(--course-line);padding:14px 16px;color:var(--course-ink);font-weight:760;line-height:1.45;text-decoration:none}.course-navigation a:last-child{text-align:right}.course-navigation small{display:block;margin-bottom:4px;color:var(--course-muted);font-family:Consolas,SFMono-Regular,monospace;font-weight:500}.course-source-list{margin-top:64px;border-top:1px solid var(--course-line);padding-top:24px}.course-source-list h2{font-size:1.3rem}.course-source-list li{color:var(--course-muted);font-size:.9rem}.course-overview__promise{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1fr);gap:24px 56px;align-items:start;border-bottom:1px solid var(--course-line);padding:52px 0}.course-overview__promise .course-block__label{grid-column:1 / -1}.course-overview__promise h2{font-size:clamp(2rem,5vw,4.6rem);line-height:1}.course-overview__promise>p:last-child{margin:0;color:var(--course-muted);font-size:1.08rem;line-height:1.85}.course-unit-list{margin:0;padding:0;list-style:none}.course-unit-list li{border-bottom:1px solid var(--course-line)}.course-unit-list a{display:grid;grid-template-columns:3rem minmax(0,1fr) auto;gap:20px;align-items:baseline;min-height:132px;padding:24px 0;color:var(--course-ink);text-decoration:none;transition:padding .16s ease}.course-unit-list a:hover{padding-inline:10px}.course-unit-list__number,.course-unit-list__time{color:var(--course-accent);font-family:Consolas,SFMono-Regular,monospace;font-size:.78rem;font-weight:800}.course-unit-list__copy{display:grid;gap:8px}.course-unit-list__copy strong{font-family:"Source Han Serif SC","Noto Serif SC",Songti SC,serif;font-size:clamp(1.45rem,3vw,2.2rem);line-height:1.15}.course-unit-list__copy>span{max-width:50rem;color:var(--course-muted);line-height:1.65}.course-support-links{display:grid;grid-template-columns:repeat(4,1fr);margin-top:36px;border-block:1px solid var(--course-line)}.course-support-links a{min-height:80px;border-right:1px solid var(--course-line);padding:20px 14px;color:var(--course-ink);font-weight:760;line-height:1.5;text-decoration:none}.course-support-links a:last-child{border-right:0}.course-schedule{display:grid;gap:0;margin:0;padding:0;list-style:none}.course-schedule>li{display:grid;grid-template-columns:minmax(100px,.28fr) minmax(0,1fr);gap:32px;border-top:1px solid var(--course-line);padding:32px 0}.course-schedule__time{display:grid;align-content:start;gap:8px;color:var(--course-muted);font-family:Consolas,SFMono-Regular,monospace}.course-schedule__time span{color:var(--course-accent);font-size:2rem}.course-schedule h2{font-size:clamp(1.5rem,3vw,2.5rem)}.course-schedule h2 a{text-decoration:none}.course-schedule h3{margin-top:22px;font-size:.9rem}.course-reference{display:grid;gap:52px}.course-reference section{border-top:2px solid var(--course-ink);padding-top:18px}.course-reference h2{margin-top:8px;font-size:clamp(1.6rem,3vw,2.5rem)}.course-reference ul{margin:24px 0 0;padding:0;list-style:none}.course-reference li{display:flex;gap:16px;justify-content:space-between;border-top:1px solid var(--course-line);padding:13px 0}.course-reference li span{flex:none;color:var(--course-muted);font-family:Consolas,SFMono-Regular,monospace;font-size:.75rem}@media(max-width:800px){.course-program{padding-top:12px}.course-hero,.course-layout,.course-task-grid,.course-overview__promise,.course-schedule>li{grid-template-columns:1fr}.course-hero{gap:32px}.course-meta{border-top:1px solid var(--course-line);border-left:0;padding-top:22px;padding-left:0}.course-rail{display:none}.course-mobile-toc{display:block}.course-layout{padding-top:32px}.course-block--analogy{margin-left:0}.course-unit-list a{grid-template-columns:2rem minmax(0,1fr)}.course-unit-list__time{grid-column:2}.course-support-links{grid-template-columns:1fr 1fr}.course-support-links a:nth-child(2){border-right:0}.course-support-links a:nth-child(-n+2){border-bottom:1px solid var(--course-line)}.course-reference li{display:grid}}@media print{html,body,.sa-shell{background:#fff!important;color:#111!important}.sa-shell{--paper: #111;--muted: #444;--line: #bbb;--ember: #7b421e;--ember-strong: #5f3015;--moss: #355f55;--coal: #fff;--coal-2: #fff}.course-program{--course-surface: #fff;padding:0;color-scheme:light;print-color-adjust:economy}.sa-nav,.sa-footer,.skip-link,.course-rail,.course-mobile-toc,.course-navigation,.course-block--instructor:not([open]){display:none!important}.course-hero,.course-layout{display:block}.course-block,.course-prose pre{break-inside:avoid}.course-prose,.course-prose p,.course-prose li,.course-prose td,.course-prose th{color:#111!important}}