/* Chapter collections follow the listening page's editorial hierarchy. */
.apps-page { --wash: rgba(99,102,241,.07); }
.apps-hero { display:grid; grid-template-columns:minmax(0,1.1fr) minmax(0,1fr); align-items:center; gap:80px; padding-block:64px 66px; }
.apps-hero-copy { min-width:0; }
.apps-hero h1 { font-size:clamp(48px,5.8vw,80px); font-weight:600; letter-spacing:-.065em; line-height:1.1; margin-bottom:23px; }
.apps-hero h1 span { background:linear-gradient(105deg,var(--blue),var(--lavender)); background-clip:text; -webkit-text-fill-color:transparent; }
.apps-hook { font-size:27px; line-height:1.4; letter-spacing:-.035em; margin-bottom:20px; }
.apps-description { max-width:450px; font-size:14px; line-height:1.9; color:var(--muted); margin-bottom:25px; }
.apps-hero-note { font-size:11px; color:var(--muted); margin:14px 0 0; }
.apps-facts { margin-top:30px; display:flex; gap:12px 23px; flex-wrap:wrap; font-size:11px; color:var(--muted); }
.apps-facts strong { font-size:14px; color:var(--text); margin-right:4px; }
.apps-facts>span:last-child { flex-basis:100%; }
.apps-feature { margin:0; min-width:0; background:linear-gradient(155deg,var(--surface),var(--bg)); border:1px solid var(--line); border-radius:20px; padding:26px 28px 20px; box-shadow:var(--shadow); position:relative; overflow:hidden; }
.apps-feature::before { content:""; position:absolute; inset:0 0 auto; height:3px; background:linear-gradient(90deg,var(--blue),var(--lavender)); }
.apps-feature-top { display:flex; justify-content:space-between; gap:12px; align-items:center; margin-bottom:20px; }
.apps-feature-top .eyebrow { margin:0; font-size:9px; }
.apps-feature-top>span { font:10px 'JetBrains Mono',monospace; color:var(--muted); padding:3px 8px; border:1px solid var(--line); border-radius:20px; white-space:nowrap; }
.apps-feature-map,.apps-chapter-map { display:block; overflow:hidden; border:1px solid var(--line); border-radius:9px; background:var(--surface); }
.apps-feature-map img,.apps-chapter-map img { display:block; width:100%; height:auto; aspect-ratio:3/2; object-fit:contain; background:#0f172a; }
.apps-feature-map>span,.apps-chapter-map>span { display:flex; justify-content:space-between; padding:10px 14px; font-size:10px; color:var(--muted); }
.apps-feature-map:hover,.apps-chapter-map:hover { border-color:var(--blue); }
.apps-feature-map:hover>span,.apps-chapter-map:hover>span { color:var(--blue); }
.apps-feature-title { font-size:11px; font-weight:600; color:var(--blue); margin:22px 0 9px; }
.apps-feature h2 { font-size:clamp(25px,2.3vw,32px); line-height:1.18; letter-spacing:-.035em; margin:0; }
.apps-feature-description { margin:12px 0 0; color:var(--muted); line-height:1.7; font-size:12px; }
.apps-feature figcaption { margin-top:21px; padding-top:17px; border-top:1px solid var(--line); }
.apps-feature figcaption a { display:flex; align-items:center; gap:13px; font-size:13px; font-weight:600; }
.apps-launch-icon { display:grid; place-items:center; flex:0 0 42px; height:42px; border-radius:50%; background:linear-gradient(135deg,#2563eb,#7c3aed); color:white; font-size:20px; }
.apps-feature small { display:block; margin-top:2px; color:var(--muted); font-weight:400; font-size:10px; }
.apps-launch-arrow { margin-left:auto; color:var(--blue); font-size:24px; }
.apps-collection { border-top:1px solid var(--line); padding-block:45px 75px; }
.apps-collection-heading { display:flex; justify-content:space-between; align-items:flex-end; gap:40px; margin-bottom:32px; }
.apps-collection-heading .eyebrow { margin-bottom:12px; }
.apps-collection-heading h2 { font-size:38px; letter-spacing:-.045em; font-weight:550; line-height:1.2; margin:0; }
.apps-collection-heading h2 span { color:var(--muted); }
.apps-collection-heading>p { max-width:360px; font-size:13px; color:var(--muted); margin:0; line-height:1.9; }
.apps-chapter-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:28px; }
.apps-chapter-card { --card-accent:var(--blue); display:flex; flex-direction:column; min-width:0; padding:28px; border:1px solid var(--line); border-radius:16px; background:var(--surface); }
.apps-chapter-card:nth-child(3n+2) { --card-accent:var(--lavender); }
.apps-chapter-card:nth-child(3n) { --card-accent:var(--green); }
.apps-chapter-header { display:flex; align-items:center; gap:17px; margin-bottom:23px; }
.apps-chapter-number { color:var(--card-accent); font-size:38px; font-weight:500; letter-spacing:-.065em; line-height:1; opacity:.8; }
.apps-chapter-header .eyebrow { font-size:8px; color:var(--card-accent); margin-bottom:5px; }
.apps-chapter-title { font-size:12px; line-height:1.5; font-weight:600; margin:0; }
.apps-chapter-card h3 { font-size:30px; line-height:1.22; letter-spacing:-.04em; font-weight:600; margin:0 0 16px; }
.apps-chapter-description { color:var(--muted); font-size:13px; line-height:1.85; margin-bottom:24px; }
.apps-chapter-map { margin-top:auto; }
.apps-chapter-actions { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:12px 20px; padding-top:22px; }
.apps-chapter-actions .button { gap:20px; }
.apps-chapter-actions .text-link { color:var(--muted); padding-block:12px; }
.apps-chapter-actions .text-link:hover { color:var(--blue); }
.apps-book-note { margin:26px 0 0; font-size:12px; color:var(--muted); }
@media(max-width:1100px) {
  .apps-hero { gap:40px; }
  .apps-chapter-card { padding:24px; }
  .apps-chapter-card h3 { font-size:27px; }
}
@media(max-width:850px) {
  .apps-hero { grid-template-columns:1fr; padding-top:40px; gap:38px; }
  .apps-hero-copy { max-width:650px; }
  .apps-hero h1 { font-size:64px; }
  .apps-description { max-width:570px; }
  .apps-feature-map img { max-height:340px; }
  .apps-collection-heading { display:block; }
  .apps-collection-heading>p { margin-top:18px; max-width:600px; }
  .apps-chapter-grid { gap:20px; }
  .apps-chapter-card { padding:20px; }
  .apps-chapter-header { gap:12px; }
  .apps-chapter-card h3 { font-size:25px; }
}
@media(max-width:700px) {
  .apps-chapter-grid { grid-template-columns:1fr; }
}
@media(max-width:520px) {
  .apps-hero { padding-block:32px 38px; }
  .apps-hero h1 { font-size:53px; }
  .apps-hook { font-size:23px; }
  .apps-feature { padding:20px 18px; }
  .apps-feature h2 { font-size:25px; }
  .apps-collection { padding-block:32px 45px; }
  .apps-collection-heading h2 { font-size:32px; }
  .apps-chapter-header .eyebrow { font-size:8px; letter-spacing:.08em; }
  .apps-chapter-title { font-size:11px; }
  .apps-chapter-number { font-size:34px; }
  .apps-chapter-description { font-size:12px; }
  .apps-chapter-actions { gap:8px 14px; }
  .apps-chapter-actions .button,.apps-chapter-actions .text-link { font-size:11px; }
  .apps-chapter-actions .button { gap:12px; padding:12px 14px; }
}