:root{--night:#171817;--deep:#0d0e0d;--paper:#f4f1e9;--white:#fbfaf5;--coral:#d54832;--ink:#252724;--muted:#666860;--line:#d9d7cd;--display:'Archivo Black',sans-serif;--body:'DM Sans',sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--body);font-size:16px;line-height:1.65}a{color:inherit;text-underline-offset:4px}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--coral);outline-offset:5px}button:disabled{cursor:default}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.12}h1,h2{font-family:var(--display);font-weight:400}button{border:0}svg{display:block}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;top:-70px;left:20px;z-index:20;padding:12px;background:var(--white);color:var(--night)}.skip-link:focus{top:12px}
.resource-header{height:90px;background:var(--night);color:var(--paper);display:flex;align-items:center;justify-content:space-between;padding:0 38px;border-bottom:1px solid #373934;gap:24px}.brand{font-family:var(--display);font-size:25px;text-decoration:none;letter-spacing:-1px;line-height:1}.brand span{display:block;font-family:var(--body);font-size:8px;font-weight:600;letter-spacing:1.6px;margin-top:9px}.header-label{font-size:10px;letter-spacing:2px;color:#b9bab2}.home-link{font-size:13px;text-decoration:none}.home-link span{margin-left:18px;color:#f0826c;font-size:20px}.course-shell{display:grid;grid-template-columns:290px minmax(0,1fr);max-width:1800px;margin:auto;align-items:start}.course-sidebar{position:sticky;top:0;background:var(--night);color:var(--paper);padding:36px 22px 30px;min-height:calc(100svh - 90px);max-height:100svh;overflow-y:auto}.sidebar-intro{padding:0 12px 30px}.eyebrow{font-size:10px;font-weight:700;letter-spacing:1.5px;line-height:1.5}.sidebar-intro .eyebrow{color:#f0826c}.sidebar-intro h1{font-size:42px;letter-spacing:-1.8px;margin:18px 0}.sidebar-intro p{font-size:13px;color:#b9bab2;max-width:210px}.nav-label{font-size:9px;letter-spacing:1.3px;color:#b9bab2;margin:0 12px 14px}.lesson-link{display:grid;grid-template-columns:24px minmax(0,1fr) 14px;gap:10px;align-items:start;padding:17px 12px;border-radius:4px;margin-bottom:6px;text-decoration:none;border:1px solid transparent}.lesson-link strong{display:block;font-size:13px;font-weight:600;line-height:1.5}.lesson-link small{display:block;font-size:10px;color:#b9bab2;margin-top:3px}.lesson-number{font-size:11px;padding-top:2px;font-variant-numeric:tabular-nums}.lesson-state{font-size:13px}.lesson-link[aria-current=page]{background:var(--coral);color:var(--white)}.lesson-link[aria-current=page] small{color:var(--white)}a.lesson-link:hover{border-color:#888c80}.coming-soon{color:#aaa;a{pointer-events:none}}.library-progress{margin:30px 12px 0;padding-top:25px;border-top:1px solid #41433b;font-size:11px}.library-progress>div{display:flex;justify-content:space-between}.library-progress progress{width:100%;height:5px;appearance:none;border:0;border-radius:0;margin:14px 0;background:#41433b}.library-progress progress::-webkit-progress-bar{background:#41433b}.library-progress progress::-webkit-progress-value{background:var(--coral)}.library-progress progress::-moz-progress-bar{background:var(--coral)}.library-progress p{font-size:10px;color:#b9bab2}.text-button{color:inherit;background:transparent;padding:5px 0;font-size:11px;text-decoration:underline;text-underline-offset:3px}.sidebar-help{display:block;margin:32px 12px 0;font-size:11px;text-decoration:none;color:#b9bab2}.sidebar-help strong{display:block;color:var(--paper);font-size:12px;margin-top:4px}.lesson-toggle{display:none}
main{min-width:0;outline:none}.lesson-topbar{display:flex;justify-content:space-between;gap:16px;padding:22px 5%;font-size:11px;border-bottom:1px solid var(--line)}.lesson-topbar a{text-decoration:none}.lesson-topbar span{color:var(--muted)}.lesson-hero{padding:52px 6% 40px;border-bottom:1px solid var(--line);position:relative;isolation:isolate;overflow:hidden}.hero-meta{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin-bottom:26px;font-size:10px;font-weight:700;letter-spacing:.8px;text-transform:uppercase}.chip{padding:4px 9px;border:1px solid #b6b8ab;border-radius:2px}.chip-coral{color:#a32a1b;border-color:#d4a69b}.lesson-hero h2{font-size:clamp(36px,4.5vw,69px);letter-spacing:-2.6px;line-height:1.02;max-width:850px;text-wrap:balance}.lesson-hero h2 em{font-style:normal;color:var(--coral)}.hero-description{max-width:590px;color:var(--muted);font-size:16px;line-height:1.65;margin:24px 0 26px}.hero-bottom{display:flex;align-items:center;gap:22px;flex-wrap:wrap}.action{background:var(--coral);color:var(--white);padding:12px 20px;border-radius:3px;text-decoration:none;font-size:12px;font-weight:700;display:inline-flex;align-items:center;justify-content:center;gap:22px;min-height:44px}.action:hover{background:#b93825}.small-note{font-size:11px;color:var(--muted)}.lesson-path{display:flex;gap:10px;align-items:center;flex-wrap:wrap;font-size:10px;letter-spacing:.3px;color:var(--muted);margin-top:30px}.lesson-path b{color:var(--coral);font-weight:500}.lesson-layout{display:grid;grid-template-columns:minmax(0,1fr) 200px;gap:44px;padding:38px 6% 70px;align-items:start}.lesson-body{min-width:0}.lesson-body section{scroll-margin-top:24px;margin-bottom:38px}.lesson-body h3{font-size:22px;letter-spacing:-.5px;margin-bottom:14px}.lesson-body p{margin:12px 0;font-size:14px}.lesson-body ul,.lesson-body ol{padding-left:20px;font-size:14px}.lesson-body li{margin:8px 0}.section-kicker{font-size:10px!important;color:#a32a1b;letter-spacing:1.4px;font-weight:700;text-transform:uppercase;margin-bottom:8px!important}.goal-box{border-left:3px solid var(--coral);padding:4px 0 4px 20px;margin-bottom:28px}.goal-box p{margin:0}.account-grid{display:grid;grid-template-columns:1fr 1fr;gap:9px;margin:20px 0}.account-link{border:1px solid var(--line);padding:13px;text-decoration:none;background:var(--white);min-width:0}.account-link strong{font-size:13px;display:flex;justify-content:space-between;gap:8px}.account-link strong:after{content:'↗';color:var(--coral)}.account-link span{display:block;color:var(--muted);font-size:11px;margin-top:3px}.account-link:hover{border-color:var(--coral)}.note{background:#e9e6dc;padding:15px 18px;border-radius:3px;font-size:12px!important;line-height:1.65}.step{position:relative;padding-top:25px;border-top:1px solid var(--line)}.step-title{display:flex;gap:14px;align-items:baseline;margin-bottom:12px}.step-number{font-size:11px;font-weight:700;color:#a32a1b;flex-shrink:0}.step-title h3{margin:0;font-size:21px;line-height:1.25}.task-check{display:flex;gap:10px;align-items:flex-start;font-size:12px;line-height:1.6;margin-top:18px;cursor:pointer}.task-check input{accent-color:var(--coral);width:17px;height:17px;margin:1px 0 0;flex-shrink:0}.task-check:has(input:checked){color:#545b4b}.prompt-box{background:var(--night);color:var(--paper);border-radius:4px;margin:20px 0;overflow:hidden}.prompt-header{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px 16px;border-bottom:1px solid #3e4139;font-size:10px;text-transform:uppercase;letter-spacing:1px}.copy-button{padding:6px 10px;background:#34372f;color:var(--paper);border:1px solid #555a4d;border-radius:3px;font-size:11px;text-transform:none;letter-spacing:0;min-height:34px}.prompt-box pre{padding:18px;margin:0;white-space:pre-wrap;overflow-wrap:anywhere;font-family:var(--body);font-size:12px;line-height:1.8;max-height:390px;overflow:auto}.tool-switch{border:1px solid var(--line);padding:12px;display:flex;flex-wrap:wrap;gap:9px;margin-top:16px}.tool-switch label{padding:8px 12px;cursor:pointer;font-size:12px}.tool-switch label:has(input:checked){background:var(--night);color:var(--white);border-radius:3px}.tool-switch input{accent-color:var(--coral);margin-right:5px}.tool-switch legend{font-size:11px;padding:0 6px;color:var(--muted)}.tool-path{margin-top:14px}.tool-path[hidden]{display:none}.lesson-rail{position:sticky;top:24px;font-size:11px}.rail-title{font-size:10px;letter-spacing:1.5px;margin-bottom:14px;font-weight:700}.lesson-rail nav a{display:block;text-decoration:none;color:var(--muted);padding:6px 0}.lesson-rail nav a:hover{color:var(--coral)}.result-card{margin-top:28px;padding:20px;background:#e4e4d9;border-top:3px solid var(--night)}.result-card .result-icon{font-family:var(--display);font-size:42px;line-height:1.1;color:var(--coral);margin-bottom:12px}.result-card strong{font-size:14px;line-height:1.35;display:block}.result-card p{font-size:11px;color:var(--muted);margin-top:10px}.sources a{overflow-wrap:anywhere}.sources{padding-top:20px;border-top:1px solid var(--line)}.sources summary{font-size:12px;font-weight:700;cursor:pointer}.sources ul{font-size:12px}.finish-box{padding:25px;border:1px solid var(--line);background:var(--white)}.finish-box h3{font-family:var(--display);font-size:24px}.finish-box p{margin-bottom:20px}.lesson-pager{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:16px;padding-top:26px;font-size:12px}.lesson-pager a{text-decoration:none}.lesson-pager a:hover{text-decoration:underline}.draft-note{font-size:12px;background:#e9e6dc;border-left:3px solid var(--coral);padding:14px 18px;margin-bottom:28px}.noscript-note{padding:40px}.noscript-note a{color:#a32a1b}[hidden]{display:none!important}
@media(min-width:1500px){.lesson-layout{grid-template-columns:minmax(0,740px) 220px;justify-content:space-between}.lesson-hero{padding-top:65px;padding-bottom:50px}}
@media(max-width:1150px){.course-shell{grid-template-columns:255px minmax(0,1fr)}.course-sidebar{padding-inline:14px}.sidebar-intro h1{font-size:37px}.lesson-layout{grid-template-columns:minmax(0,1fr);gap:0}.lesson-rail{display:none}.lesson-hero h2{font-size:48px;letter-spacing:-2px}.header-label{display:none}}
@media(max-width:760px){.resource-header{height:74px;padding:0 20px;gap:15px}.brand{font-size:22px}.brand span{font-size:6px;letter-spacing:1.4px}.home-link{font-size:11px}.home-link span{margin-left:5px}.course-shell{display:block}.course-sidebar{position:static;max-height:none;min-height:0;padding:22px 20px}.sidebar-intro{padding:0}.sidebar-intro h1{font-size:29px;margin:8px 0}.sidebar-intro h1 br{display:none}.sidebar-intro h1 br:after{content:' '}.sidebar-intro p{font-size:12px;max-width:400px}.sidebar-intro h1{word-spacing:3px}.sidebar-intro h1 br{display:initial}.sidebar-intro h1 br{content:' '}.sidebar-intro .eyebrow{font-size:8px}.lesson-toggle{display:flex;width:100%;align-items:center;justify-content:space-between;background:#2b2d27;color:var(--paper);padding:12px 15px;margin-top:18px;font-size:12px;border:1px solid #4a4d42;border-radius:3px}.lesson-toggle span{font-size:20px;line-height:1}#course-navigation{display:none;padding-top:20px}#course-navigation.is-open{display:block}.library-progress{margin:16px 0 0;border:0;padding:0;display:grid;grid-template-columns:1fr auto;gap:0 15px;align-items:center}.library-progress>div{gap:12px;font-size:10px}.library-progress progress{margin:8px 0;grid-column:1/-1;grid-row:2}.library-progress p{grid-column:1/-1;font-size:9px}.library-progress .text-button{grid-column:2;grid-row:1;font-size:10px}.sidebar-help{display:none}.lesson-topbar{padding:16px 22px;font-size:10px}.lesson-hero{padding:32px 22px 30px}.hero-meta{margin-bottom:20px;font-size:9px}.lesson-hero h2{font-size:42px;letter-spacing:-1.9px}.hero-description{font-size:14px;margin-top:18px}.hero-bottom{gap:12px}.small-note{font-size:10px}.lesson-path{font-size:9px;gap:7px;margin-top:24px}.lesson-layout{padding:28px 22px 42px}.account-grid{gap:8px}.account-link{padding:10px}.account-link strong{font-size:12px}.account-link span{font-size:10px}.step-title h3{font-size:19px}.finish-box{padding:20px}.prompt-header{padding:12px}.prompt-box pre{padding:14px;font-size:12px}}
@media(max-width:360px){.lesson-hero h2{font-size:36px}.account-grid{grid-template-columns:1fr}.resource-header{padding:0 16px}.lesson-layout{padding-inline:18px}.lesson-hero{padding-inline:18px}.home-link{font-size:10px}.lesson-topbar{padding-inline:18px}}
@media(prefers-reduced-motion:no-preference){.lesson-hero h2,.hero-description{animation:enter .45s ease-out both}.hero-description{animation-delay:.06s}.action,.account-link{transition:background .15s,border-color .15s}@keyframes enter{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}}
@media print{.resource-header,.course-sidebar,.lesson-rail,.copy-button,.lesson-pager,.hero-bottom,.tool-switch,.finish-box,.lesson-topbar{display:none!important}.course-shell,.lesson-layout{display:block}.lesson-hero,.lesson-layout{padding:20px}.prompt-box{background:white;color:black;border:1px solid #aaa}.prompt-box pre{max-height:none}.tool-path[hidden]{display:block!important}body{background:white}.step{break-inside:avoid}}