:root{--paper:#faf8f3;--ink:#24352e;--muted:#5a685f;--line:#d9dfd5;--green:#245d46;--soft:#edf2e9;--white:#fffefa;--text:20px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:25px}body{margin:0;background:var(--paper);color:var(--ink);font:var(--text)/1.65 system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}button,input,textarea{font:inherit}a{color:var(--green);text-underline-offset:4px}button,a,input,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit;min-height:44px}button:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid #b46a34;outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2{font-family:Georgia,"Times New Roman",serif;font-weight:400;line-height:1.14;letter-spacing:-.035em}h1{font-size:clamp(40px,7vw,66px);max-width:790px}h2{font-size:clamp(29px,4.4vw,39px)}h3{font-size:1em;line-height:1.45}p+p{margin-top:16px}.wrap{max-width:920px;margin:auto;padding:0 36px}.top{padding:27px 0 22px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:11px;font-size:15px;text-decoration:none;color:var(--ink)}.mark{display:grid;place-items:center;border:1.5px solid var(--green);height:29px;width:29px;border-radius:50%;color:var(--green)}.reading{display:flex;gap:4px}.reading button,.quiet{border:0;background:transparent;border-radius:5px;padding:5px 10px;font-size:15px}.reading button:hover,.quiet:hover{background:var(--soft)}.reading button[aria-pressed=true]{background:var(--soft)}.skip{position:absolute;left:10px;top:-100px;background:var(--white);padding:8px}.skip:focus{top:10px;z-index:10}.intro{padding:45px 0 35px}.eyebrow{font-size:13px;letter-spacing:.11em;text-transform:uppercase;color:var(--green);font-weight:650;margin-bottom:17px}.intro>p:not(.eyebrow){margin-top:22px;max-width:730px}.muted,.small{color:var(--muted)}.small{font-size:.8em;line-height:1.6}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:27px}.button{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--green);color:white;border:1px solid var(--green);border-radius:7px;padding:10px 18px;text-decoration:none;font-size:16px;font-weight:600;min-height:46px}.button.secondary{background:transparent;color:var(--green)}.button:hover{filter:brightness(.94)}.section{padding:32px 0;border-top:1px solid var(--line)}.section>h2{margin-bottom:21px}.section>p{max-width:730px}.lesson-list{list-style:none;margin:0;padding:0}.lesson-link{display:grid;grid-template-columns:34px 1fr 18px;gap:12px;padding:19px 0;color:var(--ink);text-decoration:none;border-bottom:1px solid var(--line);align-items:start}.lesson-link:hover .lesson-name{text-decoration:underline;text-underline-offset:4px}.lesson-list li:last-child .lesson-link{border-bottom:0}.lesson-num{font-size:14px;color:var(--muted);padding-top:4px}.lesson-name{font-weight:600;font-size:.98em}.lesson-description{font-size:.84em;color:var(--muted);margin-top:3px}.lesson-arrow{color:var(--green);padding-top:3px}.lesson-state{font-size:.73em;color:var(--green);margin-top:6px}.source-note{border-left:3px solid #c0ceb8;padding-left:18px;font-size:.9em;margin-top:24px}.source-note strong{font-weight:650}.back{display:inline-block;margin-top:25px;font-size:15px}.lesson-header{padding:28px 0 30px}.lesson-header>p:not(.eyebrow){margin-top:22px;max-width:730px}.key-idea{background:var(--soft);padding:20px 24px;border-radius:8px;margin-top:27px}.key-idea p{font-size:1.04em}.steps{display:grid;gap:23px}.step{display:grid;grid-template-columns:29px 1fr;gap:14px}.step-num{font-size:14px;color:var(--green);border:1px solid #bacabc;border-radius:50%;height:29px;display:grid;place-items:center;margin-top:3px}.step p{margin-top:7px;font-size:.94em}.example{background:var(--white);border:1px solid var(--line);border-radius:11px;overflow:hidden}.tabs{display:flex;flex-wrap:wrap;gap:8px;padding:18px 20px;border-bottom:1px solid var(--line)}.tabs button{font-size:15px;border:1px solid var(--line);border-radius:22px;background:transparent;padding:6px 13px}.tabs button[aria-pressed=true]{background:var(--green);border-color:var(--green);color:white}.example-content{padding:24px;font-size:1em;min-height:130px}.example-content+.example-content{border-top:1px solid var(--line)}.example-label{font-size:.85em;color:var(--green);margin-bottom:8px}.practice-question{max-width:730px;margin-bottom:22px}.options{display:grid;gap:11px}.option{display:flex;align-items:flex-start;gap:13px;background:var(--white);border:1px solid var(--line);border-radius:8px;padding:15px 17px;font-size:.92em;line-height:1.55;cursor:pointer}.option:has(input:checked){border-color:var(--green);box-shadow:0 0 0 1px var(--green);background:#f2f6ed}.option input{margin:7px 0 0;width:17px;height:17px;flex:0 0 auto;accent-color:var(--green)}fieldset{border:0;padding:0;margin:0}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.feedback{margin-top:18px;font-size:.94em;color:var(--green);min-height:1em}.try-task{margin-top:24px;border-left:3px solid #bdcdb9;padding-left:20px}.try-task h3{margin-bottom:9px}.situations{display:grid;gap:23px}.situations p{margin-top:8px;font-size:.94em}.video-list{display:grid;gap:28px}.video h3{font-size:.9em;margin-bottom:12px}.video iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:8px;background:#e5e7e1}.video p{font-size:.75em;color:var(--muted);margin-top:6px}.source-list{list-style:none;margin:16px 0 0;padding:0}.source-list li{padding:8px 0;font-size:.86em;overflow-wrap:anywhere}.source-list a{font-weight:500}.source-list .small{font-size:.85em;margin-top:4px}.notes label{font-size:.9em;font-weight:600;display:block;margin:20px 0 8px}.notes textarea{display:block;width:100%;min-height:115px;background:var(--white);border:1px solid #b6c2b4;border-radius:8px;padding:14px;color:var(--ink);font-size:.95em;line-height:1.6;resize:vertical}.checks{display:grid;gap:12px;margin-top:24px}.checks label{display:flex;gap:12px;align-items:flex-start;font-size:.88em;font-weight:400;margin:0;cursor:pointer}.checks input{margin-top:7px;width:17px;height:17px;accent-color:var(--green);flex:0 0 auto}.save-state{font-size:.75em;color:var(--muted);margin-top:10px}.prev-next{display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;padding:30px 0;border-top:1px solid var(--line)}.prev-next a{font-size:16px;max-width:47%}.coverage{list-style:none;padding:0;margin:0}.coverage li{padding:16px 0;border-bottom:1px solid var(--line);font-size:.88em}.coverage strong{display:block;margin-bottom:5px}.coverage a{margin-right:12px;display:inline-block}.glossary{display:grid;grid-template-columns:1fr 1fr;gap:20px 30px}.glossary dt{font-weight:600;font-size:.9em}.glossary dd{font-size:.85em;color:var(--muted);margin:4px 0 0}.screenshot{margin-top:23px}.screenshot img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:8px}.screenshot figcaption{font-size:.75em;color:var(--muted);margin-top:9px}.triangle-list{display:grid;gap:15px;list-style:none;padding:0;margin-top:20px}.triangle-list li{padding:13px 0;border-bottom:1px solid var(--line)}.triangle-list a{font-size:.9em;font-weight:600}.triangle-list p{font-size:.8em;color:var(--muted);margin-top:5px}footer{padding:25px 0 35px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);line-height:1.7}footer p+p{margin-top:7px}.footer-link{font-size:15px;margin-top:20px;display:block}.storage-warning{font-size:.8em;color:#805c32;margin-top:15px}@media(max-width:550px){.wrap{padding:0 22px}.top{padding-top:18px}.brand{font-size:13px}.intro{padding:34px 0 28px}.intro>p:not(.eyebrow){font-size:.95em}.actions .button{flex:1 1 170px}.lesson-header{padding:24px 0}.lesson-link{grid-template-columns:25px 1fr 16px;gap:9px}.glossary{grid-template-columns:1fr}.example-content{padding:20px}.tabs{padding:15px}.option{padding:13px}.key-idea{padding:17px}.section{padding:28px 0}.prev-next a{max-width:100%}.video iframe{border-radius:5px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{body{background:white;font-size:15px}.reading,.actions,.back,.prev-next,.tabs,.video iframe{display:none}.wrap{max-width:none}.section{break-inside:avoid}.notes textarea{min-height:80px}a{color:inherit}.example{box-shadow:none}footer{font-size:11px}}