:root{--ink:#28263b;--muted:#626477;--purple:#7054bb;--line:#e4e3ec;--paper:#f7f8fc}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65}a{color:var(--purple);text-underline-offset:4px}a:hover{color:#483080}a:focus-visible,button:focus-visible,select:focus-visible{outline:3px solid #7156b7;outline-offset:5px}.site-header,main,footer{max-width:1160px;width:calc(100% - 64px);margin:auto}.site-header{display:flex;align-items:center;gap:32px;padding:26px 0;border-bottom:1px solid var(--line)}.brand{font-size:1.4rem;font-weight:750;letter-spacing:-.045em;text-decoration:none;color:var(--ink)}.brand span{display:inline-grid;place-items:center;background:#e9e3f7;color:var(--purple);width:40px;height:44px;border-radius:13px;font-size:1.8rem;margin-right:7px}.site-header nav{display:flex;gap:22px;margin-left:auto}.site-header nav a,.languages a{font-size:.85rem;text-decoration:none;color:var(--muted)}.languages{display:flex;gap:10px}.languages [aria-current]{color:var(--purple);font-weight:700}main{padding:38px 0 70px}h1,h2,h3{line-height:1.17;letter-spacing:-.035em}h1{font-size:clamp(2.1rem,5vw,4.2rem);max-width:850px;margin:15px 0 24px;font-weight:720}h2{font-size:1.8rem;margin:0 0 22px}h3{font-size:1.3rem;margin:10px 0 17px}p{margin:12px 0}.hero{padding:24px 0 32px}.lead{font-size:1.16rem;color:var(--muted);max-width:760px;line-height:1.75}.eyebrow{font-size:.69rem;font-weight:750;letter-spacing:.15em;text-transform:uppercase;color:var(--purple)}.small{font-size:.8rem;color:var(--muted)}.button,button{display:inline-flex;align-items:center;justify-content:center;gap:25px;background:var(--purple);border:0;border-radius:11px;color:#fff;font:inherit;font-size:.91rem;font-weight:650;text-decoration:none;padding:14px 21px;min-height:48px;cursor:pointer}.button:hover,button:hover{background:#5b40a0;color:#fff}.course-hero .button{margin-top:16px}.badges{display:flex;gap:6px;flex-wrap:wrap}.badge{font-size:.72rem;padding:5px 9px;border-radius:7px;background:#efebf8;color:#635087}.level-filter{display:flex;gap:12px;align-items:center;flex-wrap:wrap;background:#fff;padding:22px;border:1px solid var(--line);border-radius:16px;margin:0 0 38px}.level-filter label{font-weight:650;margin-right:8px}.level-filter select{font:inherit;padding:11px;border:1px solid var(--line);border-radius:9px;background:#fff;max-width:100%;color:var(--ink)}.level-filter p{flex-basis:100%;margin:0}main>section{margin-top:48px}.starter-path{background:#eaf3ee;padding:28px;border-radius:24px}.section-head{display:flex;gap:19px;align-items:flex-start;margin:0 0 25px}.section-head h2{margin:0 0 10px}.section-head p{max-width:740px;color:#476456}.path-icon{display:grid;place-items:center;flex-shrink:0;width:54px;height:60px;background:#d5e7dc;color:#46765c;font-size:2.4rem;border-radius:16px}.course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.starter-path .course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.course-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;display:flex;flex-direction:column;align-items:flex-start}.course-card h3 a{color:var(--ink);text-decoration:none}.course-card h3 a:hover{text-decoration:underline}.course-card>p:not(.eyebrow){font-size:.91rem;color:var(--muted);margin:0 0 18px}.course-card .badges{margin-top:auto;margin-bottom:17px}.course-card .course-link{font-size:.86rem;font-weight:650}.course-card>.small{margin-top:8px}.back{font-size:.88rem}.course-layout{display:grid;grid-template-columns:minmax(0,1.8fr) minmax(0,1fr);gap:32px;margin-top:35px}.syllabus{list-style:none;padding:0;margin:0}.syllabus li{display:flex;gap:18px;padding:25px;margin-bottom:14px;border:1px solid var(--line);background:#fff;border-radius:16px}.syllabus h3{margin:0 0 8px}.syllabus p{font-size:.93rem;color:var(--muted);margin-bottom:0}.lesson-number{flex-shrink:0;display:grid;place-items:center;background:#efebf8;color:var(--purple);font-size:.84rem;font-weight:700;width:37px;height:40px;border-radius:10px}.note{padding:24px;background:#eeebf8;border-radius:17px;margin-bottom:18px}.note h2{font-size:1.2rem}.note p{font-size:.9rem}.note.green{background:#eaf3ee}.sources{padding-top:30px;border-top:1px solid var(--line);overflow-wrap:anywhere}.sources>p{color:var(--muted)}.sources li{margin-bottom:17px}.sources li p{max-width:780px;margin-top:5px}.closing{padding:30px;border-radius:18px;background:#eeebf8;text-align:center}footer{display:flex;flex-wrap:wrap;align-items:center;gap:25px;border-top:1px solid var(--line);padding:25px 0 35px}footer>a:not(.brand){font-size:.84rem}footer .brand{margin-right:auto}.skip{position:absolute;top:-100px;left:20px;padding:12px;background:#fff;z-index:2}.skip:focus{top:10px}@media(max-width:850px){.course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.course-layout{grid-template-columns:1fr}.site-header{gap:18px;flex-wrap:wrap}.site-header nav{gap:15px}.languages{margin-left:auto}}@media(max-width:550px){.site-header,main,footer{width:calc(100% - 32px)}.site-header{padding:18px 0;gap:13px}.brand{font-size:1.2rem}.site-header nav{order:3;width:100%;margin:0;justify-content:space-between}.languages a{font-size:.76rem}main{padding-top:24px}.hero{padding-top:8px}.lead{font-size:1rem}.course-grid,.starter-path .course-grid{grid-template-columns:1fr}.starter-path{padding:19px 15px;margin-left:-4px;margin-right:-4px}.section-head{gap:12px}.section-head h2{font-size:1.4rem}.section-head p{font-size:.9rem}.path-icon{width:39px;height:47px;font-size:1.9rem;border-radius:11px}.course-card{padding:22px}.level-filter{padding:18px}.level-filter label{width:100%}.level-filter select{width:100%}.level-filter button{width:100%}.syllabus li{padding:20px 16px;gap:12px}.lesson-number{width:30px;height:35px}.syllabus h3{font-size:1.15rem}.course-layout{gap:22px}footer{gap:13px}footer .brand{width:100%}.button{max-width:100%}.closing{padding:25px 15px}}
.preview{display:grid;grid-template-columns:minmax(200px,320px) 1fr;gap:35px;align-items:center;background:#fff;padding:28px;border:1px solid var(--line);border-radius:20px;margin:30px 0}.preview-board{display:grid;grid-template-columns:repeat(8,1fr);aspect-ratio:1;border:8px solid #edf2ed;border-radius:10px;overflow:hidden;width:100%}.preview-board .square{display:grid;place-items:center;aspect-ratio:1;line-height:1;font-family:"DejaVu Sans","Segoe UI Symbol",serif;font-size:clamp(21px,3.1vw,34px);color:#232c2a}.square.light{background:#eef3e9}.square.dark{background:#95b3a0}.preview h2{font-size:1.55rem}.preview h3{font-size:1.08rem}.preview p{color:var(--muted)}@media(max-width:650px){.preview{grid-template-columns:1fr;padding:20px;gap:23px}.preview-board{max-width:320px;margin:auto}.preview-board .square{font-size:30px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.preview-board .square{position:relative}.preview-board small{position:absolute;font:600 9px/1 system-ui,sans-serif;color:#364e40}.preview-board .rank-label{top:2px;left:2px}.preview-board .file-label{bottom:2px;right:2px}
.guided-path{padding:26px;border:1px solid var(--line);border-radius:18px;background:#fff;margin:28px 0}.guided-path>p{max-width:850px;color:var(--muted)}.guided-path>ol{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 36px;padding-left:25px}.guided-path>ol>li{padding:8px}.guided-path h3{font-size:1.1rem}.guided-path li p,.guided-path li li{font-size:.88rem}.guided-path li ul{padding-left:18px}.guided-path li li{margin:8px 0}@media(max-width:650px){.guided-path{padding:20px}.guided-path>ol{grid-template-columns:1fr;gap:10px}}