/* Scoped lesson and practice panels. No external media is fetched until configured. */
.pf-learning-section { min-width:0; }
.pf-learning-section *, .pf-learning-section *::before, .pf-learning-section *::after { box-sizing:border-box; }
.pf-learning-header { max-width:900px; margin-bottom:34px; }
.pf-learning-heading { max-width:870px; }
.pf-learning-description { max-width:660px; margin-top:20px; font-size:1.05rem; line-height:1.7; }
.pf-learning-kicker { display:block; color:var(--accent-text,#f15b50); font-size:.75rem; font-weight:600; letter-spacing:.06em; line-height:1.6; }
.pf-learning-button { display:inline-flex; align-items:center; justify-content:space-between; gap:18px; min-height:48px; max-width:100%; padding:13px 20px; border:1px solid transparent; border-radius:7px; background:var(--action,#d32f27); color:#fff; font:700 .9rem/1.5 Arial,Helvetica,sans-serif; text-align:left; text-decoration:none; cursor:pointer; transition:background .2s,border-color .2s; }
.pf-learning-button:hover { background:var(--action-hover,#df3229); }
.pf-learning-button > span { font-size:1.2rem; }
.pf-learning-button:disabled { opacity:.55; cursor:default; }
.pf-learning-button-quiet { background:transparent; border-color:#55595e; color:var(--white,#f7f6f3); }
.pf-learning-button-quiet:hover { background:#303235; border-color:#787d83; }
.pf-learning-section button:focus-visible, .pf-learning-section a:focus-visible, .pf-learning-section [tabindex]:focus-visible { outline:3px solid var(--accent-text,#f15b50); outline-offset:4px; }
.pf-demo-shell { position:relative; overflow:hidden; border:1px solid #43464b; border-radius:14px; background:linear-gradient(145deg,#232528,#1a1b1d 75%); }
.pf-demo-topline { display:flex; justify-content:space-between; align-items:center; gap:16px; padding:17px 26px; border-bottom:1px solid #ffffff10; color:#a9adb2; font-size:.75rem; letter-spacing:.04em; line-height:1.5; }
.pf-demo-counter { color:var(--accent-text,#f15b50); font: .8rem/1.4 monospace; white-space:nowrap; }
.pf-demo-tabs { display:grid; grid-template-columns:repeat(4,minmax(0,1fr)); gap:0; padding:0 26px; }
.pf-demo-tab { display:flex; align-items:center; justify-content:flex-start; gap:10px; min-width:0; min-height:64px; padding:12px 6px; border:0; border-bottom:2px solid #42454b; background:transparent; color:#b7bcc2; text-align:left; font-size:.85rem; line-height:1.35; }
.pf-demo-tab > span { display:grid; flex:0 0 24px; place-items:center; width:24px; height:24px; border:1px solid #555a61; border-radius:50%; font: .68rem/1 monospace; }
.pf-demo-tab[aria-selected="true"] { color:#fff; border-bottom-color:var(--accent,#e63b32); }
.pf-demo-tab[aria-selected="true"] > span { color:#fff; background:var(--action,#d32f27); border-color:var(--action,#d32f27); }
.pf-demo-body { padding:26px; }
.pf-demo-panel { min-width:0; }
.pf-demo-panel:not([hidden]) { animation:pf-learning-enter .28s ease-out both; }
.pf-demo-intro { display:grid; grid-template-columns:minmax(0,1.7fr) minmax(0,.8fr); gap:28px; align-items:center; }
.pf-demo-lesson-title h3 { margin-top:11px; font-size:clamp(1.35rem,2.5vw,2rem); line-height:1.3; }
.pf-demo-placeholder { position:relative; isolation:isolate; display:flex; align-items:flex-end; min-height:280px; padding:30px; overflow:hidden; border:1px solid #484146; border-radius:9px; background:radial-gradient(ellipse at 75% 10%,#672a256b,transparent 62%),linear-gradient(140deg,#242326,#111315); }
.pf-demo-media-grid { position:absolute; inset:0; z-index:-1; overflow:hidden; color:#ad746c; }
.pf-demo-media-grid i { position:absolute; width:48%; height:130%; top:-15%; right:12%; border:1px solid #b4665b38; transform:rotate(28deg); border-radius:18px; }
.pf-demo-media-grid i:nth-child(2) { right:-9%; }
.pf-demo-media-grid i:nth-child(3) { right:-30%; }
.pf-demo-media-grid i:nth-child(4) { right:-51%; }
.pf-demo-media-grid b { position:absolute; top:13px; right:24px; color:#e6796c18; font-size:6.5rem; font-style:italic; font-weight:900; letter-spacing:-.1em; line-height:1; }
.pf-demo-poster { position:absolute; inset:0; z-index:-2; width:100%; height:100%; object-fit:cover; }
.pf-demo-placeholder:has(.pf-demo-poster)::before { content:''; position:absolute; inset:0; z-index:-1; background:linear-gradient(0deg,#111315f2,#11131590); }
.pf-demo-placeholder-copy { max-width:430px; }
.pf-demo-placeholder h3 { margin-top:8px; color:#fff; font-size:1.3rem; line-height:1.35; }
.pf-demo-placeholder p { margin-top:12px; max-width:410px; color:#c0c3c7; font-size:.9rem; line-height:1.65; }
.pf-demo-placeholder .pf-learning-button { margin-top:20px; }
.pf-demo-media { min-width:0; }
.pf-demo-video { display:block; width:100%; max-height:390px; aspect-ratio:16/9; border:1px solid #42474c; border-radius:8px; background:#0c0e10; object-fit:contain; }
.pf-demo-video-error { margin-top:12px; color:#f9aba2; font-size:.85rem; }
.pf-demo-scenario { display:grid; grid-template-columns:180px minmax(0,1fr); align-items:center; gap:36px; min-height:280px; padding:16px 22px; }
.pf-demo-person { position:relative; width:160px; margin:auto; }
.pf-demo-person svg { width:160px; height:160px; stroke:#7c5450; stroke-width:1.3; }
.pf-demo-person svg circle:nth-child(2), .pf-demo-person svg path:first-of-type { stroke:#e8776d; stroke-width:2; }
.pf-demo-person span { position:absolute; right:0; bottom:0; display:grid; place-items:center; width:43px; height:43px; border:1px solid #ae443c; border-radius:8px; background:#321d1d; color:#f6897e; font: .95rem/1 monospace; }
.pf-demo-scenario h3 { margin-top:9px; max-width:660px; font-size:1.7rem; }
.pf-demo-scenario p { margin-top:17px; max-width:710px; font-size:1rem; line-height:1.75; }
.pf-demo-question { min-width:0; margin:0; padding:0; border:0; }
.pf-demo-question legend { max-width:100%; padding:0; color:var(--white,#f7f6f3); font-size:1.45rem; font-weight:700; line-height:1.4; }
.pf-demo-choose-hint { margin-top:8px; font-size:.875rem; }
.pf-demo-choices { display:grid; gap:11px; margin-top:20px; }
.pf-demo-choice { position:relative; display:flex; align-items:center; gap:15px; padding:17px 19px; border:1px solid #484c53; border-radius:8px; background:#202225; cursor:pointer; }
.pf-demo-choice input { position:absolute; inset:0; width:100%; height:100%; margin:0; opacity:0; cursor:pointer; }
.pf-demo-choice:has(input:checked) { border-color:var(--accent,#e63b32); background:linear-gradient(105deg,#54242180,#272325); }
.pf-demo-choice:has(input:focus-visible) { outline:3px solid var(--accent-text,#f15b50); outline-offset:3px; }
.pf-demo-choice-mark { flex:0 0 27px; color:#a9adb3; font: .85rem/1.4 monospace; }
.pf-demo-choice-copy { display:grid; gap:5px; min-width:0; flex:1; }
.pf-demo-choice-copy strong { font-size:.975rem; font-weight:600; line-height:1.4; }
.pf-demo-choice-copy > span { color:#b4b9be; font-size:.875rem; line-height:1.5; }
.pf-demo-choice-dot { position:relative; flex:0 0 20px; width:20px; height:20px; border:1px solid #81868d; border-radius:50%; }
.pf-demo-choice input:checked ~ .pf-demo-choice-dot { border-color:#f2887e; }
.pf-demo-choice input:checked ~ .pf-demo-choice-dot::after { content:''; position:absolute; inset:4px; border-radius:50%; background:var(--accent,#e63b32); }
.pf-demo-feedback { min-height:280px; }
.pf-demo-feedback h3 { margin-top:9px; font-size:1.55rem; }
.pf-demo-feedback-empty { margin-top:20px; }
.pf-demo-answer { display:flex; align-items:flex-start; gap:17px; margin-top:22px; padding:19px; border:1px solid #76514b; border-radius:8px; background:#3c28243b; }
.pf-demo-answer-symbol { display:grid; place-items:center; flex:0 0 30px; width:30px; height:30px; border:1px solid #bc685c; border-radius:50%; color:#ff9385; font-size:1.1rem; }
.pf-demo-answer-title { color:#f2f0ec; font-size:1rem; line-height:1.5; }
.pf-demo-answer-text { margin-top:8px; font-size:.925rem; line-height:1.7; }
.pf-demo-takeaways { margin-top:24px; }
.pf-demo-takeaways h4 { margin:0 0 12px; font-size:.9rem; font-weight:600; }
.pf-demo-takeaways ul { display:grid; gap:8px; margin:0; padding:0; list-style:none; }
.pf-demo-takeaways li { position:relative; padding-left:19px; color:#bfc3c7; font-size:.9rem; line-height:1.6; }
.pf-demo-takeaways li::before { content:''; position:absolute; left:0; top:9px; width:5px; height:5px; border-radius:50%; background:var(--accent,#e63b32); }
.pf-demo-controls { display:flex; justify-content:flex-end; flex-wrap:wrap; gap:12px; padding:0 26px 27px; }
.pf-demo-controls [data-demo-back], .pf-demo-controls [data-demo-retry] { margin-right:auto; }
.pf-demo-progress { height:3px; background:#373b40; }
.pf-demo-progress i { display:block; width:25%; height:100%; background:var(--accent,#e63b32); transition:width .3s ease; }
.pf-practice-shell { display:grid; grid-template-columns:minmax(210px,.55fr) minmax(0,1.45fr); gap:28px; }
.pf-practice-tabs { display:flex; flex-direction:column; gap:10px; align-self:start; }
.pf-practice-tab { display:grid; grid-template-columns:32px minmax(0,1fr) 20px; align-items:center; gap:13px; min-height:83px; padding:18px; border:1px solid #45484c; border-radius:8px; background:#1d1f21; color:#c5c9ce; text-align:left; font-size:.925rem; line-height:1.5; }
.pf-practice-tab-number { color:#9ea4aa; font: .85rem/1.4 monospace; }
.pf-practice-tab-arrow { color:#757d84; font-size:1.3rem; }
.pf-practice-tab[aria-selected="true"] { border-color:#b95248; background:linear-gradient(110deg,#5a2822,#2a2222); color:#fff; }
.pf-practice-tab[aria-selected="true"] .pf-practice-tab-number, .pf-practice-tab[aria-selected="true"] .pf-practice-tab-arrow { color:#ff8b7e; }
.pf-practice-content { min-width:0; overflow:hidden; padding:27px; border:1px solid #45484c; border-radius:12px; background:linear-gradient(145deg,#26282b,#1b1d20); }
.pf-practice-panel:not([hidden]) { animation:pf-learning-enter .28s ease-out both; }
.pf-practice-caption { display:flex; align-items:center; justify-content:space-between; gap:16px; margin-bottom:23px; color:#b3b7bd; font-size:.7rem; line-height:1.5; letter-spacing:.04em; }
.pf-practice-caption > span:last-child { color:#f38377; font: .75rem/1.4 monospace; white-space:nowrap; }
.pf-practice-panel > h3 { font-size:1.45rem; line-height:1.4; }
.pf-practice-description { margin-top:12px; font-size:.95rem; line-height:1.7; }
.pf-practice-document { margin-top:25px; overflow:hidden; border:1px solid #4c5056; border-radius:8px; background:#17191c; }
.pf-practice-document-head { display:flex; align-items:center; gap:10px; padding:13px 19px; border-bottom:1px solid #41464d; background:#272b30; color:#dedfe1; font-size:.8rem; }
.pf-practice-doc-icon { color:#f07a6d; font-size:1.3rem; }
.pf-practice-document-head i { flex:0 0 5px; width:5px; height:5px; margin-left:auto; border-radius:50%; background:#ee6457; box-shadow:0 0 10px #e63b324a; }
.pf-practice-document dl { margin:0; padding:5px 19px; }
.pf-practice-document dl > div { display:grid; grid-template-columns:minmax(100px,.65fr) minmax(0,1.35fr); gap:18px; padding:13px 0; }
.pf-practice-document dl > div + div { border-top:1px solid #32363c; }
.pf-practice-document dt { color:#aeb4bc; font-size:.8rem; line-height:1.6; }
.pf-practice-document dd { margin:0; color:#e1e2e3; font-size:.85rem; line-height:1.6; overflow-wrap:anywhere; }
.pf-practice-feedback { display:flex; gap:14px; margin-top:23px; padding:17px 18px; border-left:2px solid var(--accent,#e63b32); background:linear-gradient(90deg,#5b302344,transparent); }
.pf-practice-feedback > span { color:#f98578; font-size:1.6rem; line-height:1; }
.pf-practice-feedback strong { display:block; color:#eeefef; font-size:.9rem; font-weight:600; }
.pf-practice-feedback p { margin-top:5px; color:#b8bec5; font-size:.85rem; line-height:1.7; }
.pf-practice-note { max-width:780px; margin-top:20px; color:#aaafb4; font-size:.8rem; line-height:1.65; }
@keyframes pf-learning-enter { from { opacity:.4; transform:translateY(6px); } to { opacity:1; transform:translateY(0); } }
.motion-paused .pf-learning-section *, .page-away .pf-learning-section * { animation:none!important; transition:none!important; }
@media (max-width:900px) {
  .pf-demo-intro { grid-template-columns:1fr; gap:19px; }
  .pf-demo-lesson-title { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:9px 20px; }
  .pf-demo-lesson-title h3 { margin-top:0; font-size:1.15rem; }
  .pf-practice-shell { grid-template-columns:minmax(190px,.6fr) minmax(0,1.4fr); gap:17px; }
  .pf-practice-content { padding:23px; }
}
@media (max-width:700px) {
  .pf-learning-header { margin-bottom:24px; }
  .pf-learning-description { margin-top:17px; font-size:.975rem; }
  .pf-demo-topline { padding:14px 17px; font-size:.7rem; }
  .pf-demo-tabs { grid-template-columns:repeat(2,minmax(0,1fr)); gap:0 16px; padding:0 17px; }
  .pf-demo-tab { min-height:58px; font-size:.8rem; }
  .pf-demo-body { padding:22px 17px; }
  .pf-demo-placeholder { min-height:250px; padding:24px 20px; }
  .pf-demo-placeholder h3 { font-size:1.2rem; }
  .pf-demo-placeholder p { font-size:.875rem; }
  .pf-demo-scenario { grid-template-columns:1fr; gap:20px; padding:4px 4px 12px; }
  .pf-demo-person { width:108px; margin:0; }
  .pf-demo-person svg { width:108px; height:108px; }
  .pf-demo-person span { width:32px; height:32px; font-size:.75rem; }
  .pf-demo-scenario h3 { font-size:1.3rem; }
  .pf-demo-scenario p { font-size:.925rem; }
  .pf-demo-question legend { font-size:1.25rem; }
  .pf-demo-choice { gap:10px; padding:16px 12px; }
  .pf-demo-choice-mark { flex-basis:23px; font-size:.75rem; }
  .pf-demo-choice-copy strong { font-size:.9rem; }
  .pf-demo-choice-copy > span { font-size:.825rem; }
  .pf-demo-choice-dot { flex-basis:17px; width:17px; height:17px; }
  .pf-demo-choice input:checked ~ .pf-demo-choice-dot::after { inset:3px; }
  .pf-demo-controls { gap:10px; padding:0 17px 22px; }
  .pf-learning-button { padding:12px 16px; font-size:.85rem; }
  .pf-demo-controls [data-demo-finish] { flex:1 1 100%; }
  .pf-demo-answer { padding:16px 13px; gap:12px; }
  .pf-demo-feedback h3 { font-size:1.3rem; }
  .pf-demo-answer-title { font-size:.925rem; }
  .pf-demo-answer-text { font-size:.875rem; }
  .pf-practice-shell { grid-template-columns:1fr; gap:15px; }
  .pf-practice-tabs { display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:7px; }
  .pf-practice-tab { display:flex; flex-direction:column; align-items:flex-start; justify-content:flex-start; gap:7px; min-height:92px; padding:13px 10px; font-size:.75rem; }
  .pf-practice-tab-number { font-size:.75rem; }
  .pf-practice-tab-arrow { display:none; }
  .pf-practice-content { padding:22px 17px; }
  .pf-practice-caption { font-size:.68rem; }
  .pf-practice-panel > h3 { font-size:1.25rem; }
  .pf-practice-description { font-size:.875rem; }
  .pf-practice-document-head { padding-inline:14px; font-size:.75rem; }
  .pf-practice-document dl { padding-inline:14px; }
  .pf-practice-document dl > div { grid-template-columns:1fr; gap:5px; }
  .pf-practice-document dt { color:#a2a9b1; font-size:.725rem; }
  .pf-practice-document dd { font-size:.85rem; }
  .pf-practice-feedback { padding:15px 12px; gap:10px; }
  .pf-practice-feedback strong { font-size:.85rem; }
  .pf-practice-feedback p { font-size:.825rem; }
}
@media (max-width:380px) {
  .pf-demo-tabs { gap:0 10px; }
  .pf-demo-tab { gap:7px; font-size:.75rem; }
  .pf-demo-topline, .pf-demo-body, .pf-demo-tabs, .pf-demo-controls { padding-inline:13px; }
  .pf-learning-button { gap:9px; padding-inline:12px; font-size:.8rem; }
  .pf-demo-placeholder { padding-inline:17px; }
  .pf-demo-choice-mark { display:none; }
  .pf-practice-content { padding-inline:13px; }
}
@media (prefers-reduced-motion:reduce) {
  .pf-learning-section *, .pf-learning-section *::before, .pf-learning-section *::after { animation:none!important; transition:none!important; }
}