/* ==== Dark band ==== */
.gray-band {
  background:
    radial-gradient(50% 30% at 100% 0%, rgba(124, 58, 237, 0.06), transparent 60%),
    var(--surface-2);
  border-block: 1px solid var(--border);
  padding: var(--sp-16) 0 var(--sp-20);
}

/* ==== Accordion ==== */
.accordion { border-bottom: 1px solid var(--border-strong); }
.accordion:first-of-type { border-top: 1px solid var(--border-strong); }
.accordion-head {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  gap: var(--sp-4); min-height: 64px;
  background: none; border: none; cursor: pointer;
  padding: var(--sp-4) 0; text-align: left;
  transition: color var(--dur-fast) var(--ease-out);
}
.accordion-head { color: var(--brand); }
.accordion-head:hover { color: var(--brand-strong); }
.accordion-head h2 {
  font-size: var(--fs-2xl); font-weight: 700; color: inherit;
  letter-spacing: -0.015em;
}
.chev {
  flex-shrink: 0; color: var(--ink-muted);
  transition: transform var(--dur) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.accordion-head .chev { color: var(--brand); }
.accordion-head:hover .chev, .faq-head:hover .chev { color: var(--brand-strong); }
.accordion.open > .accordion-head .chev { transform: rotate(180deg); }

/* 0fr -> 1fr animates the panel without JS height measuring */
.accordion-body {
  display: grid; grid-template-rows: 0fr; overflow: hidden;
  transition: grid-template-rows var(--dur-slow) var(--ease-out);
}
.accordion.open > .accordion-body { grid-template-rows: 1fr; }
.accordion-body-inner { min-height: 0; overflow: hidden; }
.accordion.open > .accordion-body > .accordion-body-inner { padding-bottom: var(--sp-6); }

/* ==== Checklist (replaces the ➤ text bullets) ==== */
.check-list { list-style: none; }
.check-list.two-col { columns: 2; column-gap: var(--sp-10); }
.check-list li {
  position: relative;
  padding-left: var(--sp-8);
  margin-bottom: var(--sp-3);
  font-size: var(--fs-base); line-height: 1.6;
  color: var(--ink-2);
  break-inside: avoid;
}
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 3px;
  width: 20px; height: 20px; border-radius: var(--r-full);
  background: var(--brand-soft) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23F5C518' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E") center / 12px 12px no-repeat;
  box-shadow: inset 0 0 0 1px var(--brand-soft-border);
}

/* Splits one checklist into tiers without adding a second accordion */
.check-list-group {
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.06em;
  color: var(--brand-ink); margin-bottom: var(--sp-3);
}
.check-list-group--pro {
  margin-top: var(--sp-5); padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
}

/* ==== Previews ==== */
.previews {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--sp-4);
  margin: var(--sp-12) 0 var(--sp-16);
}
/* the Pro edition ships 4 sample pages, not 5 */
.previews--pro { grid-template-columns: repeat(4, 1fr); margin-top: var(--sp-4); }
.previews-title {
  font-size: var(--fs-xl); font-weight: 700; color: var(--ink);
  margin-top: var(--sp-4); letter-spacing: -0.01em;
}
.previews .zoom-btn { position: relative; }
.previews img {
  width: 100%; aspect-ratio: var(--ratio-book); object-fit: cover;
  background: var(--surface-3);
  border: 1px solid var(--border-strong);
  border-radius: var(--r-md);
  box-shadow: var(--sh-sm);
  transition: transform var(--dur) var(--ease-out), box-shadow var(--dur) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.previews .zoom-btn:hover img {
  transform: translateY(-4px);
  box-shadow: var(--sh-md);
  border-color: var(--brand-soft-border);
}

/* ==== FAQ ==== */
.faq-title {
  font-size: var(--fs-3xl); font-weight: 700; margin-bottom: var(--sp-6);
  letter-spacing: -0.015em;
}
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-4); align-items: start; }
.faq-col { display: flex; flex-direction: column; gap: var(--sp-3); }
.faq-item {
  background: rgba(255, 255, 255, 0.03); border: 1px solid var(--border);
  border-radius: var(--r-md); box-shadow: var(--sh-sm);
  transition: box-shadow var(--dur) var(--ease-out), border-color var(--dur-fast) var(--ease-out);
}
.faq-item:hover { border-color: var(--border-strong); box-shadow: var(--sh-md); }
.faq-item.open { border-color: var(--brand-soft-border); }
.faq-head {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  gap: var(--sp-3); min-height: 56px;
  background: none; border: none; cursor: pointer;
  padding: var(--sp-4) var(--sp-5);
  font-size: var(--fs-md); text-align: left; color: var(--ink);
  line-height: 1.5;
}
.faq-head strong { font-weight: 600; }
.faq-body {
  display: grid; grid-template-rows: 0fr; overflow: hidden;
  transition: grid-template-rows var(--dur-slow) var(--ease-out);
}
.faq-item.open .faq-body { grid-template-rows: 1fr; }
.faq-body-inner { min-height: 0; overflow: hidden; }
.faq-item.open .faq-body-inner { padding: 0 var(--sp-5) var(--sp-5); }
.faq-body-inner p {
  font-size: var(--fs-base); color: var(--ink-2); line-height: 1.65;
  padding-top: var(--sp-1);
  border-top: 1px solid var(--border);
}
.faq-item.open .chev { transform: rotate(180deg); }

/* ==== Related ==== */
.related { padding: var(--sp-20) 0 var(--sp-12); }
.related-title {
  font-size: var(--fs-3xl); font-weight: 700; margin-bottom: var(--sp-8);
  letter-spacing: -0.015em;
}
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-6); }
.related-card { display: block; transition: transform var(--dur) var(--ease-out); }
.related-card img {
  width: 100%; aspect-ratio: var(--ratio-book); object-fit: cover;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  box-shadow: var(--sh-sm);
  transition: box-shadow var(--dur) var(--ease-out);
}
.related-card p {
  font-size: var(--fs-base); font-weight: 600; color: var(--ink);
  margin-top: var(--sp-3); line-height: 1.5;
  transition: color var(--dur-fast) var(--ease-out);
}
.related-card:hover { transform: translateY(-5px); }
.related-card:hover img { box-shadow: var(--sh-lg); }
.related-card:hover p { color: var(--brand-ink); }

/* ==== Prev / Next ==== */
.post-nav { border-top: 1px solid var(--border); padding: var(--sp-8) 0; }
.post-nav-inner { display: flex; justify-content: space-between; gap: var(--sp-6); }
.post-nav-prev, .post-nav-next {
  display: flex; flex-direction: column; gap: var(--sp-1);
  max-width: 46%; padding: var(--sp-3) var(--sp-4);
  border: 1px solid var(--border); border-radius: var(--r-md);
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.post-nav-prev:hover, .post-nav-next:hover { border-color: var(--border-strong); background: var(--surface-2); }
.post-nav-next { text-align: right; align-items: flex-end; }
.post-nav-label {
  display: inline-flex; align-items: center; gap: var(--sp-2);
  font-size: var(--fs-xs); font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--brand-ink);
}
.post-nav-title { font-size: var(--fs-base); color: var(--ink-2); line-height: 1.5; }