:root{color-scheme:light;--ink:#213937;--muted:#60716d;--accent:#176a60;--paper:#f5f7f2;--line:#dce4dc;--soft:#e9f1e9;--error:#973f31;font-family:system-ui,-apple-system,"Segoe UI",sans-serif;font-size:17px;line-height:1.6;background:var(--paper);color:var(--ink)}*{box-sizing:border-box}body{margin:0}.top{padding:18px max(24px,calc((100vw - 1050px)/2));background:white;border-bottom:1px solid var(--line);display:flex;gap:16px;align-items:center;justify-content:space-between}.brand{font-weight:750;text-decoration:none;color:var(--ink);letter-spacing:-.5px}.top form{display:flex;align-items:center;gap:12px;margin:0}.top span{color:var(--muted);font-size:.85rem}main{max-width:1010px;padding:38px 24px 72px;margin:auto}.narrow{max-width:600px;padding-top:60px}h1{font-size:clamp(1.9rem,4vw,2.7rem);line-height:1.2;letter-spacing:-1px;margin:.3em 0 .6em}h2{font-size:1.25rem;line-height:1.4}p{margin:.6em 0 1em}.eyebrow{font-size:.78rem;letter-spacing:.09em;text-transform:uppercase;font-weight:700;color:var(--accent);margin-top:0}.card{padding:28px;background:white;border:1px solid var(--line);border-radius:18px;margin:24px 0;box-shadow:0 6px 24px #20352e04}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:22px}.cards .card{margin:4px 0}.stack{display:grid;gap:20px}label{display:block;font-weight:600}input:not([type=radio]):not([type=checkbox]),textarea,select{display:block;width:100%;min-height:50px;background:white;border:1.5px solid #98aaa1;border-radius:8px;padding:12px 14px;font:inherit;color:inherit;margin:8px 0}textarea{min-height:150px;resize:vertical}input[type=radio],input[type=checkbox]{width:21px;height:21px;accent-color:var(--accent);flex-shrink:0}button,.button{display:inline-block;min-height:48px;background:var(--accent);color:white;border:1px solid transparent;padding:10px 20px;border-radius:9px;font:inherit;font-weight:650;cursor:pointer;text-decoration:none;text-align:center}button:hover,.button:hover{filter:brightness(.93)}button.secondary,.button.secondary{background:white;color:var(--accent);border-color:var(--line)}button.quiet{background:transparent;color:var(--accent);font-size:.85rem;padding:6px 12px}button:disabled{opacity:.55;cursor:wait}a{color:var(--accent)}:focus-visible{outline:3px solid #ba811e;outline-offset:3px}.choice{display:flex;gap:12px;align-items:center;padding:12px 14px;border:1px solid var(--line);border-radius:8px;margin:8px 0;font-weight:500;min-height:50px}.choice:has(input:checked){background:var(--soft);border-color:var(--accent)}fieldset{border:0;padding:0;margin:0 0 24px;min-width:0}legend{font-weight:650;margin-bottom:8px}.answer-field{border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:24px}.answer-field:last-child{border-bottom:0}.dont-know{font-size:.9rem;color:var(--muted);width:fit-content}.rule{padding:20px;border-left:4px solid #8da86d;background:#eff5e8;border-radius:4px;margin:18px 0}.rule p:last-child{margin-bottom:0}.nav{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:26px}.nav .spacer{flex:1}#save-status{font-size:.85rem;color:var(--muted);text-align:right;min-height:27px}.error{background:#fff0e9;color:var(--error);padding:16px;border:1px solid #f0c7ba;border-radius:8px;margin:12px 0}.notice{background:var(--soft);padding:16px;border-radius:10px}.progress-head{display:flex;justify-content:space-between;align-items:center;gap:16px;color:var(--muted);font-size:.9rem}progress{width:100%;height:8px;accent-color:var(--accent);display:block;margin:14px 0 30px}.task-content{font-size:1.1rem;overflow-x:auto;overflow-wrap:anywhere}.task-content h1{font-size:1.6rem}.task-content h2{font-size:1.4rem}.task-content h3{font-size:1.2rem}.feedback{border-left:4px solid #9da8a2;background:#f1f5f0;padding:18px;margin:15px 0;border-radius:6px}.feedback.correct{border-color:#378060}.feedback.incorrect{border-color:#b37838}.feedback p{white-space:pre-wrap;overflow-wrap:anywhere}.table-scroll{overflow-x:auto}table{width:100%;border-collapse:collapse;background:white}td,th{text-align:left;border:1px solid var(--line);padding:12px}pre{white-space:pre-wrap;overflow-wrap:anywhere;font-size:.85rem}code{overflow-wrap:anywhere}summary{cursor:pointer;font-weight:650;min-height:36px}.preview-field{padding:12px 0;border-bottom:1px solid var(--line)}.small{font-size:.88rem;color:var(--muted)}[hidden]{display:none!important}@media(max-width:600px){.top{padding:14px 16px;align-items:flex-start}.brand{max-width:190px}.top span{display:none}main{padding:26px 16px 50px}.card{padding:20px;border-radius:12px}.nav{gap:8px}.nav button{flex-grow:1}.nav .spacer{display:none}h1{letter-spacing:-.6px}.choice{padding:12px 8px}}