:root{color-scheme:light dark;--bg:#f5f6f3;--card:#fff;--ink:#18352f;--muted:#52645f;--line:#cdd8d2;--accent:#1d6453;--soft:#e4eee8;--red:#a23e39}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.6 system-ui,sans-serif}a{color:var(--accent);text-underline-offset:4px}header{display:flex;justify-content:space-between;align-items:center;gap:28px;padding:24px max(5vw,20px);border-bottom:1px solid var(--line);background:var(--card)}.brand{font-weight:800;font-size:22px;color:var(--ink);text-decoration:none}.brand span{display:block;font-size:11px;letter-spacing:.16em;text-transform:uppercase;color:var(--muted)}nav{display:flex;gap:18px;flex-wrap:wrap}header nav a{font-size:14px}main{max-width:1120px;margin:auto;padding:54px 24px}h1{font-size:clamp(38px,6vw,70px);line-height:1.08;letter-spacing:-.045em;margin:14px 0 24px}h2{line-height:1.25;margin:10px 0;font-size:27px}h3{font-size:23px;line-height:1.35}.eyebrow{font-size:12px;font-weight:800;letter-spacing:.14em}.lede{font-size:20px;max-width:790px;color:var(--muted)}.small,.scope,#save-status{font-size:14px;color:var(--muted)}.scope{max-width:900px}.resource{display:flex;justify-content:space-between;align-items:center;gap:24px;background:var(--soft);padding:24px;border-radius:12px;margin:32px 0}.resource h2{font-size:22px}.resource p{margin:4px 0}.button,button{display:inline-block;padding:10px 17px;border:1px solid var(--line);border-radius:8px;background:var(--card);color:var(--ink);font:inherit;font-size:15px;font-weight:650;text-decoration:none;cursor:pointer}.primary{background:var(--accent);border-color:var(--accent);color:#fff}.quiz-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.quiz-card,.practice{border:1px solid var(--line);background:var(--card);border-radius:12px;padding:25px}.quiz-card p{font-size:15px;color:var(--muted)}.quiz-card h2{font-size:24px}.quiz-card .button{display:block;text-align:center;margin:12px 0}.practice{margin-top:45px;padding:32px;scroll-margin-top:20px}.practice-head{display:flex;justify-content:space-between;align-items:center;gap:20px}#question-nav{gap:8px;margin:24px 0}#question-nav button[aria-current="step"]{background:var(--accent);color:#fff;border-color:var(--accent)}.table-wrap{overflow:auto;margin:22px 0}table{width:100%;border-collapse:collapse;min-width:550px;font-size:15px}th,td{border:1px solid var(--line);padding:11px;text-align:left;vertical-align:top}thead{background:var(--soft)}ol{padding-left:25px}li{margin:14px 0}label{display:block;font-weight:750;margin-top:25px}textarea{width:100%;margin-top:8px;border:1px solid var(--line);border-radius:8px;padding:16px;font:inherit;background:var(--bg);color:var(--ink);resize:vertical;min-height:160px}details{border:1px solid var(--line);border-radius:8px;margin:25px 0;padding:16px}summary{cursor:pointer;font-weight:750}#answer-content p{padding:7px 0;border-bottom:1px solid var(--line)}.actions{display:flex;gap:12px;justify-content:space-between}button:disabled{opacity:.45;cursor:default}svg{width:100%;height:auto;background:var(--card);color:var(--ink)}svg text{font:14px system-ui;fill:currentColor}svg .axis{stroke:currentColor;stroke-width:1.5}svg .grid{stroke:var(--line)}svg .bar,svg .box{fill:var(--soft);stroke:var(--accent);stroke-width:2}svg .fence{stroke:var(--red);stroke-dasharray:5 5}svg .outlier{fill:var(--red)}footer{display:flex;justify-content:space-between;gap:20px;padding:24px 5vw;border-top:1px solid var(--line);font-size:14px}.skip{position:absolute;left:12px;top:-100px;background:var(--card);padding:8px}.skip:focus{top:8px}a:focus-visible,button:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #cc8b20;outline-offset:4px}@media(max-width:700px){header,.resource,.practice-head,footer{align-items:flex-start;flex-direction:column}.quiz-cards{grid-template-columns:1fr}main{padding:30px 16px}.practice{padding:20px}h2{font-size:24px}header nav{gap:12px}.resource{padding:20px}table{font-size:14px}.actions button{font-size:14px}}@media(prefers-color-scheme:dark){:root{--bg:#14231f;--card:#1b3028;--ink:#edf3ef;--muted:#b4c7bd;--line:#496254;--accent:#b7dfc8;--soft:#2a4436;--red:#f19b92}.primary,button[aria-current="step"]{color:#14231f}}@media print{header,footer,.hero,#question-nav,textarea,.actions{display:none}.practice{border:0;padding:0;margin:0}details:not([open]){display:none}}