:root{color-scheme:light;--paper:#f3f3ef;--ink:#232724;--muted:#555e58;--line:#c8cdc6;--accent:#164c46;--gold:#715823;--white:#fff}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",sans-serif}a{color:var(--accent);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}button,input,textarea,select{font:inherit}button,.button{background:var(--accent);color:white;border:1px solid var(--accent);padding:10px 18px;border-radius:6px;cursor:pointer;display:inline-block;text-decoration:none;min-height:44px}button:hover,.button:hover{background:#103c37;color:white}button:disabled{opacity:.55;cursor:wait}.quiet{background:transparent;color:var(--accent)}header{display:flex;justify-content:space-between;align-items:center;padding:20px 4vw;border-bottom:1px solid var(--line);gap:20px}.brand{color:var(--ink);text-decoration:none;font-size:18px}.brand strong{display:block;font-size:24px;letter-spacing:-.03em}.locale{display:flex;align-items:center;gap:12px}.workspace{display:grid;grid-template-columns:235px minmax(0,1fr);max-width:1500px;margin:auto}aside{padding:38px 24px;border-right:1px solid var(--line)}nav{display:grid;gap:12px}nav a{padding:8px 4px}nav [aria-current]{font-weight:700}nav form{margin:8px 0}.account{color:var(--muted);overflow-wrap:anywhere}#pwa-status{font-size:12px;color:var(--muted);margin-top:36px}main{padding:40px clamp(20px,5vw,72px);min-width:0}h1{font-size:clamp(30px,4vw,48px);line-height:1.15;letter-spacing:-.03em;margin:0 0 24px;text-wrap:balance}h2{font-size:24px;line-height:1.3;margin:28px 0 12px}p{max-width:70ch}.intro{font-size:19px;color:var(--muted);max-width:58ch;margin-bottom:32px}input,textarea,select{border:1px solid #89948b;background:var(--white);padding:10px 12px;border-radius:4px;max-width:100%;color:var(--ink);caret-color:var(--accent)}input,textarea{display:block;width:100%;margin-top:6px}textarea{resize:vertical}label{display:block;font-weight:600}select{min-height:44px}.search{display:flex;align-items:end;gap:12px;margin:28px 0 36px}.search label{flex:1}.course-list article{display:flex;align-items:center;justify-content:space-between;gap:28px;padding:28px 0;border-top:1px solid var(--line)}article h2{margin-top:12px}article p{color:var(--muted);max-width:55ch}article .button{flex-shrink:0}.status{font-size:13px;font-weight:650;color:var(--gold);margin-right:12px}.accent{color:var(--accent)}.form{display:grid;gap:22px;margin:28px 0;max-width:780px}.form button{justify-self:start}.narrow{max-width:440px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0}details{border-top:1px solid var(--line);padding:22px 0}summary{cursor:pointer;font-weight:650}.lessons{padding-left:24px}.lessons li{padding:20px 0;border-bottom:1px solid var(--line)}.lessons small{display:block;color:var(--muted)}.lesson-body{white-space:pre-wrap;max-width:70ch;line-height:1.85;margin:30px 0 40px;overflow-wrap:anywhere}.success{color:var(--accent);font-weight:650}progress{width:100%;height:10px;accent-color:var(--accent)}footer{border-top:1px solid var(--line);padding-top:24px;margin-top:64px;color:var(--muted);font-size:13px}.empty{padding:40px 0}.skip{position:absolute;top:-100px;padding:12px;background:white}.skip:focus{top:0} :focus-visible{outline:3px solid var(--gold);outline-offset:4px}::selection{background:#d7e5dc;color:var(--ink)}[hidden]{display:none!important}*{scrollbar-color:#88968c var(--paper)}@media(max-width:760px){header{padding:16px 20px}.locale{display:block;font-size:13px}.brand strong{font-size:20px}.workspace{display:block}aside{border-right:0;border-bottom:1px solid var(--line);padding:16px 20px}nav{display:flex;gap:10px 18px;align-items:center;flex-wrap:wrap}nav a{font-size:14px}nav form{margin:0}nav .account{margin:0}#pwa-status{margin:12px 0 0}main{padding:30px 20px}.course-list article{display:block}article .button{margin-top:12px}.search{align-items:end}h1{font-size:34px}.actions button{flex-grow:1}}@media(prefers-reduced-motion:no-preference){button,a{transition:background-color .15s ease-out,color .15s ease-out}}