:root{--bg:#f6f5ef;--ink:#293d32;--green:#728467;--muted:#78816f;--line:#d8dece;--light:#e9eddf;--rust:#9f7959}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:30px}body{margin:0;background:var(--bg);color:var(--ink);font:18px/2 -apple-system,BlinkMacSystemFont,"PingFang TC","Microsoft JhengHei",sans-serif}a{color:inherit;text-underline-offset:5px}a:focus-visible{outline:3px solid var(--rust);outline-offset:5px}.masthead{max-width:1160px;margin:auto;padding:27px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:24px}.brand{font:italic 32px Georgia,serif;letter-spacing:-1px;text-decoration:none}.masthead nav{display:flex;gap:30px;font-size:13px}.masthead nav a{text-decoration:none}.masthead nav a:last-child{border-bottom:1px solid var(--green)}.article-heading{max-width:850px;margin:auto;padding:65px 0 35px}.eyebrow{font-size:11px;letter-spacing:2px;color:var(--green);font-weight:600;margin:0 0 22px}h1{font-family:"Songti TC",Georgia,serif;font-size:55px;line-height:1.5;font-weight:500;letter-spacing:1px;margin:0 0 22px}h1 em{font-style:normal;color:var(--green)}.deck{font-size:21px;line-height:1.9;color:#64725c;margin:0 0 24px}.meta{font-size:12px;color:#8a907f;border-top:1px solid var(--line);padding-top:17px;margin:0}.cover{max-width:960px;margin:0 auto 42px}.cover img{width:100%;height:auto;max-height:530px;object-fit:contain;display:block;background:#fbf8ef}.cover-labels{display:grid;grid-template-columns:1fr 1fr;text-align:center;font-size:13px;border-bottom:1px solid var(--line)}.cover-labels span{padding:15px}.cover-labels span+span{border-left:1px solid var(--line)}figcaption{font-size:11px;color:#818b76;line-height:1.8;margin-top:12px}.reading{max-width:790px;margin:auto}.reading p{margin:20px 0}.opening{font-size:21px;line-height:2;color:#3d503e}.reading strong{font-weight:600}section{margin:58px 0}h2{font-family:"Songti TC",Georgia,serif;font-size:32px;line-height:1.65;font-weight:500;margin:0 0 24px}h3{font-size:24px;line-height:1.7;font-weight:500;margin:0 0 20px}blockquote{margin:35px 0;padding:24px 28px;border-left:3px solid var(--green);background:var(--light);font-size:20px;line-height:2}.ref{font-size:12px}.course-outline{display:grid;grid-template-columns:1fr 1fr;gap:0 28px;margin:35px 0 48px;padding:20px 26px;background:#eeefe6}.course-outline a{display:flex;gap:17px;align-items:center;padding:10px 0;border-bottom:1px solid #dce1d1;text-decoration:none;font-size:15px}.course-outline a:hover{color:var(--green)}.course-outline span{font:italic 15px Georgia;color:var(--rust)}.phase{padding:22px 0 19px;border-block:1px solid var(--line);margin-top:58px}.phase>span{font-size:11px;letter-spacing:1px;color:var(--green)}.phase h3{font-size:23px;line-height:1.6;margin:9px 0 0}.lesson{margin:42px 0;scroll-margin-top:30px}.lesson-number{font:11px/1.5 Georgia,serif;letter-spacing:1.8px;color:var(--rust);margin:0 0 14px!important}.lesson h3{font-size:25px}.cue{font-size:16px;border-left:2px solid #b9c4ab;padding-left:20px;color:#65755c}.lesson-link{display:flex;justify-content:space-between;align-items:center;text-decoration:none;border-bottom:1px solid #bcc9af;font-size:15px;padding:10px 0;width:fit-content;gap:36px;color:#506448}.availability{font-size:13px;color:var(--muted);padding:20px 0;border-top:1px solid var(--line)}.start{background:var(--light);padding:32px 35px}.start h2{font-size:30px}.start p{font-size:17px}.start-links{display:flex;flex-direction:column;gap:12px;margin:25px 0}.start-links a{background:var(--ink);color:#f7f7f1;text-decoration:none;font-size:15px;padding:14px 20px;display:flex;justify-content:space-between;gap:15px}.start-links a+ a{background:transparent;color:var(--ink);border:1px solid #a9b79d}.small{font-size:12px!important;color:var(--muted)}.sources{font-size:12px;color:#7b866f;border-top:1px solid var(--line);padding-top:25px}.sources h2{font:500 15px/1.7 system-ui;margin-bottom:15px}.sources ol{padding-left:20px}.sources p{font-size:11px}.footer{max-width:1160px;margin:65px auto 0;display:flex;justify-content:space-between;gap:25px;align-items:center;border-top:1px solid var(--line);padding:25px 0;color:var(--muted);font-size:11px}.footer .brand{font-size:26px}.footer>a:last-child{text-decoration:none}@media(max-width:1240px){.masthead,.footer{margin-left:40px;margin-right:40px}.article-heading,.reading{width:calc(100% - 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/* Posture comparison opening */
.posture-cover{max-width:1060px}.posture-cover img{max-height:none;aspect-ratio:3/2;object-fit:contain}.comparison-titles,.comparison-notes{display:grid;grid-template-columns:1fr 1fr}.comparison-titles{background:#e9eddf;border-top:1px solid var(--line)}.comparison-titles>div{padding:18px 24px;text-align:center}.comparison-titles>div+div,.comparison-notes>div+div{border-left:1px solid var(--line)}.comparison-titles span{display:block;font-size:13px;color:var(--muted)}.comparison-titles strong{font-size:23px;font-weight:500}.comparison-notes{background:#eeefe6;border-bottom:1px solid var(--line)}.comparison-notes>div{padding:16px 24px}.comparison-notes p{margin:4px 0;font-size:18px;line-height:1.8;text-align:center}.terms{margin:38px 0;padding:28px;background:#eeefe6}.terms .eyebrow{margin-bottom:15px}.terms dl{margin:0}.terms dl>div{padding:15px 0;border-top:1px solid var(--line)}.terms dt{font-weight:600;margin-bottom:5px}.terms dd{margin:0;color:#64725c;font-size:18px;line-height:1.9}@media(max-width:640px){.comparison-titles>div{padding:12px 6px}.comparison-titles strong{font-size:18px}.comparison-titles span{font-size:11px}.comparison-notes>div{padding:12px 8px}.comparison-notes p{font-size:14px;line-height:1.8;margin:8px 0}.posture-cover{width:calc(100% - 24px)}.terms{padding:22px}.terms dd{font-size:18px}.article-heading h1{font-size:34px}}

.pending-status{display:inline-block;background:#eeefe6;color:#78816f;border:1px solid #d8dece;padding:4px 14px;border-radius:20px;font-size:14px}.lesson.pending-lesson{padding-block:24px}.site-nav{flex-wrap:wrap}.skip{position:absolute;left:-9999px}.skip:focus{left:15px;top:10px;background:white;padding:12px;z-index:99}

@media(max-width:640px){.masthead .site-nav a:first-child{display:inline}.masthead .site-nav{gap:16px}}