.de-main{padding-block:72px 96px}
.de-intro{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:56px;align-items:end;padding-bottom:40px;border-bottom:1px solid var(--line)}
.de-lede{margin-top:20px;max-width:60ch;color:var(--muted)}
.de-legend{display:grid;gap:12px;font-size:13px;color:var(--muted);margin:0}
.de-legend-row{display:flex;align-items:center;gap:12px}
.de-legend-key{width:14px;height:14px;flex:0 0 auto;border:1px solid var(--line);background:var(--white)}
.de-key-boss{background:var(--slate);border-color:var(--slate)}
.de-key-lab{background:var(--gold);border-color:var(--text-gold)}
.de-levels{padding-block:32px;border-bottom:1px solid var(--line)}
.de-level-buttons{display:flex;flex-wrap:wrap;gap:12px;margin-top:14px}
.de-level-buttons button{border:1px solid var(--line);background:transparent;color:var(--slate);padding:11px 22px;border-radius:99px;font-size:13px;font-weight:600;min-height:44px}
.de-level-buttons button[aria-current="page"]{background:var(--slate);color:var(--mist);border-color:var(--slate)}
.de-level-buttons button:hover{border-color:var(--text-gold);color:var(--text-gold)}
.de-level-buttons button[aria-current="page"]:hover{color:var(--mist);border-color:var(--slate)}
.de-level-note{margin-top:16px;max-width:72ch;color:var(--muted);font-size:14px}
.de-layout{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:56px;padding-block:48px}
.de-section-title{font-size:13px;font-family:var(--body);font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--text-gold);margin-bottom:20px}
.de-chapter-list{list-style:none;margin:0;padding:0;display:grid;gap:4px}
.de-chapter-list a{width:100%;text-align:left;display:grid;grid-template-columns:44px minmax(0,1fr);gap:12px;align-items:baseline;background:transparent;border:0;border-left:2px solid var(--line);padding:12px 14px;color:var(--slate);font-size:15px}
.de-chapter-list a:hover{border-left-color:var(--text-gold);color:var(--text-gold)}
.de-chapter-list a[aria-current="page"]{border-left-color:var(--slate);color:var(--slate);font-weight:600}
.de-chapter-index{font:600 12px/1.6 var(--body);letter-spacing:.14em;color:var(--muted)}
.de-question{margin-top:12px;font-family:var(--display);font-size:clamp(20px,2.2vw,26px);line-height:1.3;letter-spacing:-.02em}
.de-story{margin-top:16px;max-width:68ch;color:var(--muted)}
.de-modules{margin-top:36px;display:grid;gap:18px}
.de-module{border:1px solid var(--line);background:var(--white);padding:24px}
.de-module-boss{background:var(--slate);color:var(--mist);border-color:var(--slate)}
.de-module-head{display:flex;flex-wrap:wrap;gap:12px;align-items:baseline;justify-content:space-between}
.de-module-id{font:600 12px/1.6 var(--body);letter-spacing:.14em;text-transform:uppercase;color:var(--text-gold)}
.de-module-boss .de-module-id{color:var(--gold)}
.de-module-kind{font:600 12px/1.6 var(--body);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.de-module-boss .de-module-kind{color:var(--gold)}
.de-module h3{margin-top:8px;font-size:clamp(20px,2vw,24px)}
.de-module-summary{margin-top:10px;color:var(--muted);max-width:72ch}
.de-module-boss .de-module-summary{color:#d7d9d4}
.de-objectives{margin:16px 0 0;padding-left:20px;color:var(--muted);font-size:14px;display:grid;gap:6px}
.de-module-boss .de-objectives{color:#d7d9d4}
.de-mission{margin-top:16px;border-left:2px solid var(--gold);padding-left:16px;font-size:14px}
.de-module-boss .de-mission{border-left-color:var(--gold)}
.de-mission-label{font:600 12px/1.6 var(--body);letter-spacing:.14em;text-transform:uppercase;color:var(--text-gold);display:block;margin-bottom:4px}
.de-module-boss .de-mission-label{color:var(--gold)}
.de-artifact{margin-top:14px;font-size:13px;color:var(--muted)}
.de-module-boss .de-artifact{color:#d7d9d4}
.de-actions{margin-top:20px;display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.de-lab-link{display:inline-flex;align-items:center;gap:18px;background:var(--gold);color:var(--slate);border:1px solid var(--text-gold);padding:13px 22px;border-radius:99px;font-weight:600;font-size:14px;min-height:46px}
.de-lab-link:hover{background:var(--text-gold);color:var(--mist)}
.de-lab-planned{display:inline-flex;align-items:center;gap:10px;border:1px dashed var(--line);padding:12px 20px;border-radius:99px;font-size:13px;color:var(--muted);min-height:46px}
.de-module-boss .de-lab-planned{border-color:#5c6068;color:#c9cbc7}
.de-handoff{margin-top:14px;font-size:13px;color:var(--muted);font-style:italic}
.de-module-boss .de-handoff{color:#c9cbc7}
.de-disclaimer{border-top:1px solid var(--line);padding-top:24px;font-size:13px;color:var(--muted);max-width:80ch}
@media (max-width:960px){
  .de-intro{grid-template-columns:1fr;gap:28px}
  .de-layout{grid-template-columns:1fr;gap:36px}
  .de-chapter-list{grid-template-columns:repeat(auto-fit,minmax(240px,1fr));display:grid;gap:2px}
}
@media (max-width:520px){
  .de-main{padding-block:40px 64px}
  .de-module{padding:18px}
  .de-chapter-list a{grid-template-columns:38px minmax(0,1fr);padding:10px 10px}
}
@media (prefers-reduced-motion:reduce){
  .de-page *{animation:none!important;transition:none!important}
}

/* Keep the course scannable; task context stays one disclosure away. */
.de-module-details{border-top:1px solid var(--line);margin-top:18px;padding-top:3px}.de-module-details>summary{min-height:44px;padding:13px 0;cursor:pointer;font-size:13px;color:var(--text-gold)}.de-module-details[open]>summary{margin-bottom:8px}.de-module-boss .de-module-details>summary{color:inherit}.de-module-details .de-mission{margin-block:15px}.de-module-details:focus-within{scroll-margin-top:100px}

/* Chapter path reads as a story timeline: animated cards for guided lessons, distinct lab cards. */
.de-module-list,.de-module-grid{list-style:none;margin:0;padding:0;display:grid;gap:14px}
#de-module-list{display:grid;gap:14px;padding-inline-start:0}
#de-module-list>li{margin:0}
.de-module-story{position:relative;padding-inline-start:26px}
.de-module-story::before{content:"";position:absolute;left:8px;top:0;bottom:0;width:2px;background:linear-gradient(var(--gold),transparent)}
.de-module-story::after{content:"";position:absolute;left:3px;top:26px;width:12px;height:12px;border-radius:50%;background:var(--mist);border:2px solid var(--gold);animation:de-node-pulse 2.6s ease-in-out infinite}
.de-module-lab{border:1px solid var(--gold);box-shadow:0 6px 18px rgba(176,138,74,.14)}
.de-lab-live-note{font:600 12px/1.4 var(--body);letter-spacing:.06em;text-transform:uppercase;color:var(--text-gold)}
@keyframes de-node-pulse{0%,100%{transform:scale(1);opacity:.9}50%{transform:scale(1.25);opacity:.6}}
@media(prefers-reduced-motion:reduce){.de-module-story::after{animation:none}}
:root[data-motion="reduced"] .de-module-story::after{animation:none}
:root[data-theme="dark"] .de-module-story::after{background:#30343b}