.path-intro{max-width:780px;color:var(--muted);margin:0 0 20px}.chapter-links{flex-wrap:wrap;gap:10px;margin-bottom:38px}.chapter-links a{border:1px solid var(--line);border-radius:9px;background:var(--panel);min-height:48px;display:flex;align-items:center;font-size:14px}.chapter-links a:hover{color:var(--teal);border-color:var(--teal)}.chapter{margin:38px 0 48px;scroll-margin-top:24px}.chapter-heading{display:flex;gap:20px;align-items:center;justify-content:space-between;margin-bottom:18px}.chapter-heading h3{font-size:28px;margin-top:7px}.chapter-heading>.muted{white-space:nowrap}.case-panel{padding:10px;overflow-wrap:anywhere}.case-panel>.eyebrow{font-size:12px;letter-spacing:.09em;margin-bottom:18px}.case-facts{display:grid;gap:12px;margin:0}.case-facts>div{display:grid;grid-template-columns:100px minmax(0,1fr);gap:12px;padding:10px 0;border-bottom:1px solid var(--line)}.case-facts dt{font-size:13px;color:var(--muted)}.case-facts dd{margin:0;font-weight:600;line-height:1.5}.case-facts>div:last-child{border-bottom:0}.case-bars{height:220px;display:flex;align-items:stretch;gap:14px;margin:0 0 14px}.case-bar-column{min-width:0;flex:1;display:flex;flex-direction:column;align-items:center;gap:8px}.case-bar-column>span{font-size:14px;color:var(--muted)}.bar-track{height:140px;width:70%;display:flex;align-items:flex-end;border-bottom:1px solid var(--line)}.case-bar{width:100%;background:linear-gradient(var(--teal),#496e7c);border-radius:4px 4px 0 0}.bar-target{width:100%;min-width:48px;padding:8px}.bar-target.correct{background:#234640;border-color:var(--teal);opacity:1}.bar-target.wrong{background:#452838;border-color:var(--down)}.case-plots{display:grid;gap:10px}.case-plot{padding:8px;border:1px solid var(--line);border-radius:8px}.case-plot>div{font-size:13px;color:var(--blue)}.visual .case-plot svg{height:135px}.session .case-plot svg text{font-size:13px;fill:var(--text)}.numeric-form label{display:block;font-weight:600;margin-bottom:10px}.numeric-row{display:flex;flex-wrap:wrap;gap:12px}.numeric-row input{font:inherit;min-height:52px;min-width:120px;width:100%;background:#0c1621;border:1px solid var(--blue);border-radius:10px;color:var(--text);padding:12px 16px}.numeric-row input:focus-visible{outline:3px solid var(--teal);outline-offset:3px}.numeric-row input:disabled{opacity:.6}.numeric-form small{display:block;color:var(--muted);margin:12px 0;line-height:1.5}.numeric-row button{width:100%}.numeric-row button.wrong{background:#c28e9a;color:#24141c;border-color:var(--down)}.workspace>div{min-width:0}.card button{max-width:100%}.home-nav{flex-wrap:wrap}@media(max-width:720px){.chapter-heading{align-items:flex-start;flex-direction:column;gap:10px}.chapter-heading h3{font-size:25px}.chapter-links{display:grid;grid-template-columns:1fr;gap:8px}.chapter-links a{padding:12px}.case-panel{padding:6px}.case-facts>div{grid-template-columns:85px minmax(0,1fr);gap:10px}.case-bars{gap:10px}.case-plot{padding:6px}.visual .case-plot svg{height:130px}.chapter{margin-top:30px}.home-nav nav a{padding:10px 4px}.numeric-row button{min-height:52px}}