/* DOCFAN ACADEMY: interactive course lessons (Fundamentals of Public Health). Every class starts with px- so the theme cannot restyle it. */
.px{--px-fg:#0e2740;--px-muted:#4d6577;--px-line:#cfdde7;--px-bg:#f3f8fb;--px-surface:#fff;--px-accent:#0a7db8;--px-ink:#fff;--px-soft:#e2f2fa;--px-aline:#b5daec;
  --px-ok:#157a4c;--px-oksoft:#e3f5eb;--px-bad:#b3321f;--px-badsoft:#fbe8e4;--px-warn:#8a5a00;--px-warnsoft:#fff3d6;--px-wline:#ebd199;--px-eth:#0f6b4f;--px-ethsoft:#e6f4ee;--px-ethline:#b5dccb;
  --l0:#0a7db8;--l1:#7fc1e2;--l2:#aad6ec;--l3:#cce6f3;--l4:#e4f1f8;--c-birth:#0a7db8;--c-death:#b3321f;--fg:#0e2740;
  margin:1.4rem 0;color:var(--px-fg);font-size:1rem;line-height:1.55}
.px *,.px *::before,.px *::after{box-sizing:border-box}
.px a{color:var(--px-accent)}
.px :focus-visible{outline:3px solid var(--px-fg);outline-offset:2px;border-radius:4px}
.px button,.px select,.px textarea,.px input{font:inherit;color:inherit}
.px-h{margin:1.6rem 0 .4rem}
.px-kick{margin:0 0 .5rem;color:var(--px-muted);font-size:.92rem}
.px-intro{margin:0 0 .8rem;font-family:Georgia,'Times New Roman',serif;font-size:1.08rem;line-height:1.65;max-width:68ch}
.px-obj{margin:0 0 .4rem}
.px-obj summary{cursor:pointer}
.px-obj ul{margin:.5rem 0 0;padding-left:1.2rem}
.px-note{padding:.7rem .9rem;border-radius:10px;background:var(--px-warnsoft);border:1px solid var(--px-wline)}
.px-prog{display:flex;align-items:center;gap:.6rem;margin:.6rem 0 0;color:var(--px-muted);font-size:.88rem}
.px-prog i{display:block;flex:0 1 160px;height:8px;border-radius:99px;background:var(--px-line);overflow:hidden}
.px-prog i b{display:block;height:100%;background:var(--px-accent);border-radius:99px;transition:width .3s}
.px-tabs{display:flex;gap:.25rem;border-bottom:1px solid var(--px-line);margin:1rem 0 1.2rem;overflow-x:auto}
.px-tabs[hidden]{display:none}
.px-tabs button{background:none;border:0;border-bottom:3px solid transparent;padding:.65rem .9rem;font-weight:600;color:var(--px-muted);cursor:pointer;white-space:nowrap}
.px-tabs button[aria-selected="true"]{color:var(--px-fg);border-bottom-color:var(--px-accent)}
.px-tabs .px-ct{font-weight:500;font-size:.8rem;margin-left:.4rem;color:var(--px-muted)}
.px-read{font-family:Georgia,'Times New Roman',serif;font-size:1.06rem;line-height:1.72;max-width:70ch}
.px-read p{margin:0 0 1em}.px-read ul,.px-read ol{padding-left:1.25rem;margin:0 0 1em}.px-read li{margin-bottom:.4em}
.px-read h3{font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;font-size:1.28rem;margin:1.7em 0 .5em;line-height:1.25}
.px-read b,.px-read strong{font-weight:600}
.px-cite{font:500 .74rem system-ui,sans-serif;padding:0 .4rem;border:1px solid var(--px-line);border-radius:99px;text-decoration:none;white-space:nowrap;background:var(--px-surface)}
.px-box{border:1px solid var(--px-aline);background:var(--px-soft);border-radius:10px;padding:.85rem 1rem;margin:1.2em 0;font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;font-size:.98rem;line-height:1.6;max-width:70ch}
.px-box.px-ev{background:var(--px-warnsoft);border-color:var(--px-wline)}.px-box.px-et{background:var(--px-ethsoft);border-color:var(--px-ethline)}
.px-lab{display:block;font-weight:700;margin-bottom:.2rem}
.px-tw{overflow-x:auto;margin:1.2em 0;border:1px solid var(--px-line);border-radius:10px;background:var(--px-surface)}
.px-tw table{border-collapse:collapse;width:100%;min-width:520px;font-family:system-ui,-apple-system,'Segoe UI',Roboto,sans-serif;font-size:.92rem;line-height:1.45}
.px-tw th,.px-tw td{text-align:left;vertical-align:top;padding:.55rem .75rem;border-bottom:1px solid var(--px-line)}
.px-tw th{background:var(--px-soft);font-weight:700}.px-tw tr:last-child td{border-bottom:0}
.px-fig{margin:1.4em 0;max-width:640px}
.px .diagram{width:100%;height:auto;display:block}
.px .dg-t{font:700 12.5px system-ui,sans-serif;fill:var(--px-fg)}.px .dg-t0{font:700 13px system-ui,sans-serif;fill:#fff}.px .dg-s{font:500 11px system-ui,sans-serif;fill:var(--px-muted)}.px .dg-b{font:700 13px system-ui,sans-serif}
.px-nav2{display:flex;justify-content:space-between;gap:.75rem;flex-wrap:wrap;margin-top:1.6rem;padding-top:1rem;border-top:1px solid var(--px-line)}
.px-btn{display:inline-flex;align-items:center;gap:.5rem;border:1px solid var(--px-accent);background:var(--px-accent);color:var(--px-ink)!important;padding:.6rem 1rem;border-radius:8px;font:600 1rem system-ui,sans-serif;cursor:pointer;text-decoration:none;min-height:42px;line-height:1.2}
.px-btn:hover{filter:brightness(1.08)}
.px-btn.px-sec{background:transparent;color:var(--px-accent)!important}
.px-btn.px-sm{padding:.35rem .75rem;min-height:34px;font-size:.9rem}
.px-btn[disabled]{opacity:.5;cursor:not-allowed}
.px-card{background:var(--px-surface);border:1px solid var(--px-line);border-radius:12px;padding:1.1rem;margin:0 0 1rem}
.px-card h3,.px-card h4{margin:0 0 .4rem}
.px-grid{display:grid;gap:.9rem;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));margin:.8rem 0}
.px-stat b{display:block;font-size:1.8rem;line-height:1.1;font-variant-numeric:tabular-nums}.px-stat span{color:var(--px-muted);font-size:.9rem}
.px-act h3{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap;font-size:1.12rem}
.px-intro2{color:var(--px-muted);margin:0 0 .8rem;max-width:70ch}
.px-tag{font-size:.78rem;font-weight:600;border-radius:99px;padding:1px .6rem;border:1px solid var(--px-line);color:var(--px-muted);background:var(--px-bg)}
.px-tag.px-done{color:var(--px-ok);border-color:var(--px-ok);background:var(--px-oksoft)}
.px-arow{display:grid;grid-template-columns:minmax(0,1fr) minmax(140px,260px);gap:.6rem;align-items:center;padding:.5rem 0;border-bottom:1px dashed var(--px-line)}
.px-arow:last-of-type{border-bottom:0}
.px select,.px input[type=number],.px textarea{background:var(--px-surface);border:1px solid var(--px-line);border-radius:8px;padding:.5rem .6rem;min-height:40px;width:100%}
.px textarea{min-height:96px;resize:vertical}
.px-arow.px-ok select,.px .px-ok-i{border-color:var(--px-ok);background:var(--px-oksoft)}
.px-arow.px-bad select,.px .px-bad-i{border-color:var(--px-bad);background:var(--px-badsoft)}
.px-fb{margin:.5rem 0 0;font-size:.95rem}.px-fb.px-ok{color:var(--px-ok)}.px-fb.px-bad{color:var(--px-bad)}
.px-orow{display:grid;grid-template-columns:34px minmax(0,1fr) auto;gap:.6rem;align-items:center;padding:.5rem .6rem;border:1px solid var(--px-line);border-radius:10px;margin-bottom:.4rem;background:var(--px-surface)}
.px-orow.px-ok{border-color:var(--px-ok);background:var(--px-oksoft)}.px-orow.px-bad{border-color:var(--px-bad);background:var(--px-badsoft)}
.px-pos{font-weight:800;color:var(--px-muted);text-align:center}
.px-mv{display:flex;gap:.25rem}
.px-mv button{width:36px;height:36px;border-radius:8px;border:1px solid var(--px-line);background:var(--px-bg);cursor:pointer}
.px-mv button[disabled]{opacity:.4;cursor:default}
.px-actions{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.8rem}
.px-opt{display:grid;grid-template-columns:30px minmax(0,1fr);gap:.6rem;align-items:start;width:100%;text-align:left;background:var(--px-surface);border:1px solid var(--px-line);border-radius:10px;padding:.7rem .75rem;margin-bottom:.5rem;cursor:pointer;line-height:1.45}
.px-opt:hover:not([disabled]){border-color:var(--px-accent);background:var(--px-soft)}
.px-k{display:grid;place-items:center;width:26px;height:26px;border-radius:50%;border:1px solid var(--px-line);font-weight:700;font-size:.82rem;background:var(--px-bg)}
.px-opt.px-sel{border-color:var(--px-accent);background:var(--px-soft)}
.px-opt.px-ok{border-color:var(--px-ok);background:var(--px-oksoft)}.px-opt.px-bad{border-color:var(--px-bad);background:var(--px-badsoft)}
.px-opt.px-ok .px-k{background:var(--px-ok);color:#fff;border-color:var(--px-ok)}.px-opt.px-bad .px-k{background:var(--px-bad);color:#fff;border-color:var(--px-bad)}
.px-opt[disabled]{cursor:default}
.px-qbar{display:flex;justify-content:space-between;gap:.75rem;color:var(--px-muted);font-size:.92rem;margin-bottom:.3rem}
.px-qprog{height:6px;border-radius:99px;background:var(--px-line);overflow:hidden;margin-bottom:.9rem}.px-qprog b{display:block;height:100%;background:var(--px-accent)}
.px-qtext{font-size:1.15rem;font-weight:600;line-height:1.4;margin:0 0 .9rem;max-width:62ch}
.px-expl{margin-top:.6rem;padding:.75rem .9rem;border-radius:10px;background:var(--px-soft);border:1px solid var(--px-aline);font-size:.97rem}
.px-score{display:flex;gap:1.1rem;align-items:center;flex-wrap:wrap}.px-score .px-big{font-size:2.8rem;font-weight:800;line-height:1;font-variant-numeric:tabular-nums}
.px-rv{border-top:1px solid var(--px-line);padding:.75rem 0}.px-rv .px-q{font-weight:600}
.px-bars{display:grid;gap:.4rem;margin:.8rem 0}
.px-bars div{display:grid;grid-template-columns:150px minmax(0,1fr) 54px;gap:.6rem;align-items:center;font-size:.9rem}
.px-bars i{display:block;height:10px;background:var(--px-line);border-radius:99px;overflow:hidden}.px-bars i b{display:block;height:100%;background:var(--px-accent)}
.px-term{display:grid;gap:.6rem;grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}
.px-flip button{width:100%;height:100%;min-height:120px;text-align:left;border:1px solid var(--px-line);border-radius:12px;background:var(--px-surface);padding:.85rem;cursor:pointer;display:flex;flex-direction:column;justify-content:center;gap:.35rem}
.px-flip .px-t{font-weight:700;font-size:1.02rem}.px-flip .px-d{font-size:.95rem;line-height:1.45}.px-flip .px-hint{color:var(--px-muted);font-size:.82rem}
.px-flip button[aria-pressed="true"]{background:var(--px-soft);border-color:var(--px-aline)}
.px details.px-sa{border:1px solid var(--px-line);border-radius:10px;background:var(--px-surface);padding:.75rem .9rem;margin-bottom:.6rem}
.px details.px-sa summary{cursor:pointer;font-weight:600}
.px .px-ans{margin-top:.6rem;padding-top:.6rem;border-top:1px dashed var(--px-line)}
.px-calcq{padding:.6rem 0;border-bottom:1px dashed var(--px-line)}
.px-calcq .px-in{display:flex;gap:.5rem;align-items:center;flex-wrap:wrap;margin-top:.4rem}.px-calcq input{width:140px}
.px-ptab{overflow-x:auto}.px-ptab table{border-collapse:collapse;min-width:560px;width:100%}
.px-ptab th,.px-ptab td{padding:.4rem .5rem;border-bottom:1px solid var(--px-line);text-align:center}.px-ptab td:first-child,.px-ptab th:first-child{text-align:left}
.px-ptab select{width:72px;min-height:34px;padding:.2rem .3rem}
.px-rank{display:grid;gap:.4rem;margin-top:.6rem}
.px-rank div{display:grid;grid-template-columns:26px 160px minmax(0,1fr) 44px;gap:.6rem;align-items:center}
.px-rank i{display:block;height:12px;background:var(--px-line);border-radius:99px;overflow:hidden}.px-rank i b{display:block;height:100%;background:var(--px-accent)}
.px-group{background:var(--px-soft);border:1px solid var(--px-aline);border-radius:12px;padding:.9rem 1rem;margin:.9rem 0}
.px-take{padding-left:1.2rem}.px-refs li{margin-bottom:.5rem}.px-refs a{word-break:break-word}
.px-muted{color:var(--px-muted)}
.px-ring{--p:0;flex:none;width:28px;height:28px;border-radius:50%;background:conic-gradient(var(--px-accent) calc(var(--p)*1%),var(--px-line) 0);display:grid;place-items:center}
.px-ring::before{content:attr(data-n);display:grid;place-items:center;width:22px;height:22px;border-radius:50%;background:var(--px-surface);font-size:.7rem;font-weight:700}
.px-ring.px-full{background:var(--px-ok)}.px-ring.px-full::before{color:var(--px-ok)}
.px-chlist{list-style:none;margin:.6rem 0;padding:0;display:grid;gap:.4rem}
.px-chlist li{display:grid;grid-template-columns:28px minmax(0,1fr) auto;gap:.7rem;align-items:center;padding:.55rem .7rem;border:1px solid var(--px-line);border-radius:10px;background:var(--px-surface)}
.px-chlist small{display:block;color:var(--px-muted)}
.px-notei{margin:0 0 1rem}.px-notei h4{margin:0 0 .2rem}
.px-notei pre{white-space:pre-wrap;font-family:inherit;background:var(--px-surface);border:1px solid var(--px-line);border-radius:8px;padding:.6rem .75rem;margin:.2rem 0 0}
.px-badge{display:inline-block;margin-left:.4rem;padding:0 .5rem;border-radius:99px;background:#e2f2fa;border:1px solid #b5daec;color:#0e2740;font-size:.78rem;font-weight:600;white-space:nowrap}
.px-badge.px-full{background:#e3f5eb;border-color:#157a4c;color:#157a4c}
@media (max-width:560px){.px-arow{grid-template-columns:1fr}.px-bars div{grid-template-columns:90px minmax(0,1fr) 48px}.px-rank div{grid-template-columns:22px 100px minmax(0,1fr) 40px}.px-chlist li{grid-template-columns:28px minmax(0,1fr)}.px-chlist li .px-btn{grid-column:1/-1}}
@media (prefers-reduced-motion:reduce){.px *{animation:none!important;transition:none!important}}
.px-edit{margin:0 0 .6rem;font-size:.88rem}