*{box-sizing:border-box}body{margin:0;background:#fff;color:#17202f;font:16px/1.65 -apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif}a{color:inherit}a:focus-visible{outline:3px solid #2563eb;outline-offset:5px}.wrap{width:min(1100px,calc(100% - 40px));margin:auto}.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;padding:20px 0;border-bottom:1px solid #edf0f4}.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-size:11px;letter-spacing:1px;font-weight:700;line-height:1.5}.brand img{object-fit:contain}.brand small{display:block;font-size:9px;letter-spacing:2.6px}.site-header nav{display:flex;gap:24px;font-size:13px}.site-header nav a{text-decoration:none}.reading{width:min(720px,calc(100% - 40px));margin:65px auto 80px}h1{font-size:clamp(34px,5vw,48px);line-height:1.15;letter-spacing:-1.5px;margin:0 0 16px}.intro{color:#64748b;font-size:18px;margin:0 0 40px}.journey{list-style:none;padding:0;margin:0}.journey li{border-top:1px solid #e5e9ef}.journey li:last-child{border-bottom:1px solid #e5e9ef}.journey a{display:flex;align-items:center;gap:24px;padding:25px 0;text-decoration:none}.number{font-size:13px;color:#94a3b8;align-self:flex-start;padding-top:4px}.journey h2{font-size:21px;font-weight:600;line-height:1.3;margin:0 0 5px}.journey p{font-size:15px;color:#64748b;margin:0}.arrow{margin-left:auto;color:#2563eb;padding-left:10px}.journey a:hover h2{color:#2563eb}.back{display:inline-block;font-size:14px;color:#64748b;text-decoration:none;margin-bottom:30px}.step-label{font-size:11px;letter-spacing:1.6px;color:#64748b;margin:0 0 12px}.lesson-list{padding-left:25px}.lesson-list li{padding:0 0 22px 8px}.lesson-list li::marker{color:#94a3b8;font-size:13px}.lesson-list h2{font-size:20px;line-height:1.3;font-weight:600;margin:0 0 6px}.lesson-list p{color:#526174;margin:0}.step-links{display:flex;justify-content:space-between;gap:25px;border-top:1px solid #e5e9ef;padding-top:25px;margin-top:25px;font-size:14px}.step-links a{color:#2563eb;text-decoration:none}footer{padding:25px 0;border-top:1px solid #edf0f4;font-size:12px;color:#64748b}.skip{position:absolute;top:-100px;background:white;padding:10px}.skip:focus{top:10px}@media(max-width:550px){.site-header{flex-wrap:wrap;gap:12px}.site-header nav{width:100%;justify-content:space-between}.reading{margin-top:36px;margin-bottom:45px}.intro{font-size:16px;margin-bottom:28px}.journey a{gap:14px;padding:21px 0}.journey h2{font-size:19px}.journey p{font-size:14px}.step-links{flex-wrap:wrap}}

/* Detail stays inside individual stage pages. */
.lesson-list>li{padding-bottom:36px}.lesson-list p+p{margin-top:13px}.lesson-list .practical-tip{font-size:15px;border-left:2px solid #d8e3f2;padding-left:14px;color:#64748b}.lesson-list .practical-tip strong{color:#334155}.references{font-size:12px;color:#64748b;margin-top:30px}.references a{text-underline-offset:3px}@media(max-width:550px){.lesson-list>li{padding-bottom:30px}.lesson-list p{font-size:16px}.lesson-list .practical-tip{font-size:14px}}