.page.book-seccus::before{
  background-image:url("backgrounds/seccus-bg.webp");
  background-position:center center;
  filter:brightness(0.68) contrast(1.08) saturate(0.9);
}

.book-copy{
  font-size:13px;
  line-height:1.25;
  color:var(--muted);
  max-width:78ch;
}

.book-copy p{
  margin:0 0 12px;
}

.book-copy p:last-child{
  margin-bottom:0;
}

.theme-list{
  margin:0;
  padding:0;
  list-style:none;
  display:grid;
  gap:7px;
  color:var(--muted);
  font-size:13px;
  line-height:1.35;
  max-width:78ch;
}

.theme-list li::before{
  content:'— ';
  opacity:.72;
}

.video-card{
  border:1px solid rgba(242,242,244,.12);
  border-radius:16px;
  overflow:hidden;
  background:rgba(0,0,0,.22);
}

.video-title{
  padding:12px 14px 0;
  font-size:16px;
  line-height:1.25;
  font-weight:800;
  color:rgba(242,242,244,.94);
}

.video-desc{
  padding:10px 14px 0;
  font-size:13px;
  line-height:1.35;
  color:var(--muted);
}

.video-desc p{
  margin:0 0 10px;
}

.video-frame{
  position:relative;
  width:calc(100% - 28px);
  aspect-ratio:16/9;
  margin:14px;
  border-radius:16px;
  overflow:hidden;
  background:rgba(0,0,0,.35);
  border:1px solid rgba(242,242,244,.12);
}

.video-frame iframe{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  border:0;
}

.video-note{
  padding:0 14px 0;
  font-size:12px;
  line-height:1.25;
  color:var(--muted);
  opacity:.88;
}

.video-actions{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  padding:12px 14px 14px;
}

.video-actions a,
.video-actions span{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 11px;
  border-radius:999px;
  border:1px solid rgba(242,242,244,.16);
  background:rgba(255,255,255,.04);
  font-size:12px;
  font-weight:700;
  color:var(--fg);
  text-decoration:none;
}

.video-actions span{
  color:var(--muted);
  font-weight:600;
}

.excerpt{
  position:relative;
  max-width:78ch;
  font-size:14px;
  line-height:1.46;
  color:rgba(242,242,244,.94);
  letter-spacing:.01em;
}

.excerpt p{
  margin:0 0 7px;
}

.excerpt h3{
  margin:0 0 8px;
  font-size:16px;
  line-height:1.25;
  color:rgba(242,242,244,.96);
}

.excerpt h4{
  margin:16px 0 8px;
  font-size:13px;
  line-height:1.25;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--muted);
}

.excerpt.is-collapsed{
  max-height:500px;
  overflow:hidden;
}

.excerpt-fade{
  position:absolute;
  left:0;
  right:0;
  bottom:0;
  height:105px;
  pointer-events:none;
  background:linear-gradient(to bottom,rgba(11,11,13,0) 0%,rgba(11,11,13,.68) 58%,rgba(11,11,13,.96) 100%);
  display:none;
}

.excerpt.is-collapsed .excerpt-fade{
  display:block;
}

.quiet-book-link{
  font-size:12px!important;
  font-weight:600!important;
  color:var(--muted)!important;
  border-color:rgba(242,242,244,.12)!important;
  background:rgba(255,255,255,.025)!important;
  padding:9px 13px!important;
  opacity:.78!important;
}

.quiet-book-link:hover{
  opacity:.95!important;
  color:var(--fg)!important;
}