.ai-intro{
  display:grid;
  grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);
  align-items:center;
  gap:48px;
}
.ai-intro-copy{
  max-width:540px;
  margin-top:24px;
  color:var(--muted);
  font-size:18px;
  line-height:1.8;
}
.ai-check-window{
  align-self:center;
}
.ai-check-body{
  display:grid;
  gap:18px;
}
.ai-check-body>p:last-child{
  font-size:var(--size-small);
}
.ai-check-list{
  margin:0;
}
.ai-check-list>div{
  display:grid;
  grid-template-columns:100px minmax(0,1fr);
  gap:14px;
  padding-block:16px;
  border-bottom:1px solid var(--border);
}
.ai-check-list>div:first-child{
  padding-top:0;
}
.ai-check-list dt{
  font-weight:var(--weight-semibold);
}
.ai-check-list dd{
  margin:0;
  color:var(--muted);
}
.ai-guide{
  padding-top:28px;
}
.ai-chapter{
  padding-top:48px;
  padding-bottom:16px;
}
.ai-chapter+.ai-chapter{
  margin-top:24px;
  border-top:1px solid var(--border);
}
.ai-chapter .sec-index{
  margin-bottom:12px;
}
.ai-text-columns,
.ai-pair{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:32px;
}
.ai-chapter .prose{
  color:var(--text-soft);
}
.ai-chapter .prose h3{
  color:var(--text);
}
.ai-text-columns h3:first-child,
.ai-pair h3:first-child{
  margin-top:0;
}
.ai-chapter>.prose{
  max-width:var(--reading);
}
.ai-chapter .table-scroll+.prose{
  margin-top:20px;
}
.ai-pair{
  gap:20px;
}
.ai-chapter .callout{
  margin-block:24px;
}
.ai-chapter .callout p{
  margin:0;
}
@media(max-width:900px){
  .ai-intro{
    grid-template-columns:minmax(0,1fr);
    gap:28px;
  }
  .ai-check-window{
    max-width:680px;
    width:100%;
  }
}
@media(max-width:640px){
  .ai-intro-copy{
    font-size:var(--size-body);
  }
  .ai-text-columns,
  .ai-pair{
    grid-template-columns:minmax(0,1fr);
    gap:20px;
  }
  .ai-check-list>div{
    grid-template-columns:minmax(0,1fr);
    gap:6px;
  }
  .ai-chapter{
    padding-top:32px;
  }
}