:root{font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#20231f;background:#f5f2e9;font-synthesis:none;--ink: #20231f;--muted: #6d7068;--line: #d4cfc2;--paper: #faf8f1}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh}button,input{font:inherit;color:inherit}button{cursor:pointer;border:0;background:transparent}h1,h2,p{margin-top:0}h1{font-size:32px;font-weight:600;letter-spacing:-.025em}h2{font-size:18px;font-weight:600}.loading{min-height:100vh;display:grid;place-items:center}.sign-in-shell{min-height:100vh;display:grid;place-items:center;padding:24px}.sign-in-card{width:min(420px,100%)}.sign-in-card h1{margin-bottom:32px}.learner-list{display:grid;gap:8px}.learner-list button,.activity-row,.worksheet-list button{border:1px solid var(--line);background:var(--paper);border-radius:6px;text-align:left}.learner-list button{padding:14px 16px}.learner-list button:hover,.activity-row:hover,.worksheet-list button:hover{border-color:var(--ink)}.add-learner{margin-top:20px;color:var(--muted);text-decoration:underline;text-underline-offset:3px}.sign-in-card form{display:grid;gap:10px}form label{font-size:13px;font-weight:600}input{width:100%;border:1px solid #aaa69b;background:#fff;padding:12px;border-radius:5px}input:focus{outline:2px solid #777;outline-offset:1px}.login-actions{display:flex;justify-content:flex-end;align-items:center;gap:14px;margin-top:4px}button.primary{background:var(--ink);color:#fff;padding:11px 15px;border-radius:5px}.error{color:#9f2d18;font-size:13px}.banner{border:1px solid #d7a093;padding:10px 12px;margin-bottom:24px}.app-shell>header{height:64px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 max(24px,5vw)}.wordmark{font-weight:650}.header-start{display:flex;align-items:center;gap:38px}.header-start nav{display:flex;align-items:center;gap:22px;height:64px}.header-start nav button{height:64px;color:var(--muted);border-bottom:2px solid transparent}.header-start nav button:hover{color:var(--ink)}.header-start nav button.active{color:var(--ink);border-bottom-color:var(--ink)}.profile{color:var(--muted)}.profile:hover{color:var(--ink);text-decoration:underline;text-underline-offset:3px}.app-shell>main{width:min(760px,calc(100vw - 48px));margin:0 auto;padding:54px 0 90px}.practice-list>h1{margin-bottom:26px}.practice-list>div{display:grid;gap:8px}.activity-row{width:100%;padding:17px 18px;display:flex;justify-content:space-between;align-items:center;gap:20px}.activity-row>span:first-child{display:grid;gap:4px}.activity-row small{color:var(--muted);font-size:13px;line-height:1.4}.activity-row>span:last-child{color:var(--muted)}.worksheet-shelf{margin-top:56px;padding-top:26px;border-top:1px solid var(--line)}.worksheet-list{display:grid;gap:8px}.worksheet-list button{padding:13px 15px;display:flex;justify-content:space-between}.worksheet-list button:disabled{cursor:wait;opacity:.6}.back{color:var(--muted);margin-bottom:32px;padding:0}.session-panel h1{margin-bottom:12px}.session-summary{color:var(--muted);margin-bottom:32px}.context-details{border-top:1px solid var(--line);padding:16px 0}.context-details summary{cursor:pointer;font-weight:600}.word-cloud{display:flex;flex-wrap:wrap;gap:6px;padding-top:18px}.word-cloud span{border:1px solid var(--line);background:var(--paper);padding:6px 8px;border-radius:4px;font-size:13px}details pre{white-space:pre-wrap;font:12px/1.55 ui-monospace,monospace;color:var(--muted);margin-top:18px}.progress-view h1{margin-bottom:26px}.leaderboard-frame{overflow-x:auto;border-top:1px solid var(--line)}.leaderboard{width:100%;border-collapse:collapse;font-variant-numeric:tabular-nums}.leaderboard caption{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.leaderboard th,.leaderboard td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:right}.leaderboard thead th{color:var(--muted);font-size:12px;font-weight:600}.leaderboard th:nth-child(2),.leaderboard td:nth-child(2){text-align:left}.leaderboard th:first-child,.leaderboard td:first-child{width:42px;padding-left:10px;color:var(--muted);text-align:left}.leaderboard tbody th{font-weight:600}.leaderboard tbody tr.current{background:#e4e9df}.leaderboard .you{margin-left:9px;color:var(--muted);font-size:11px;font-weight:500;text-transform:uppercase;letter-spacing:.04em}.quiet{color:var(--muted)}@media(max-width:560px){.app-shell>header{padding:0 20px}.header-start{gap:22px}.header-start nav{gap:14px}.app-shell>main{width:calc(100vw - 32px);padding-top:38px}.activity-row{align-items:flex-start}}