/* ─────────────────────────────────────────────
   Motion Gen Details Page  ·  Extended Styles
   ───────────────────────────────────────────── */

/* ── Back link in nav ────────────────────── */
.nav-back {
  font-weight: 600 !important;
  color: var(--accent) !important;
  border-right: 1px solid var(--border-subtle);
  padding-right: 18px !important;
  margin-right: 6px;
}

/* ── Pipeline Flow ───────────────────────── */
.pipeline-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-top: 20px;
  position: relative;
  padding-left: 32px;
}
.pipeline-flow::before {
  content: '';
  position: absolute;
  left: 18px;
  top: 22px;
  bottom: 22px;
  width: 2px;
  background: linear-gradient(180deg, var(--accent), var(--blue), var(--purple), var(--green));
  border-radius: 2px;
}
.pipeline-step {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  padding: 20px 24px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  margin-bottom: 12px;
  transition: border-color .3s, transform .25s, box-shadow .3s;
  position: relative;
}
.pipeline-step:hover {
  border-color: var(--border-accent);
  transform: translateX(4px);
  box-shadow: 0 6px 24px rgba(0,0,0,0.3);
}
.pipeline-step__num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--accent-glow);
  border: 2px solid var(--accent);
  color: var(--accent);
  font-family: var(--font-mono);
  font-size: .85rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.pipeline-step h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 4px;
}
.pipeline-step p {
  color: var(--text-secondary);
  font-size: .88rem;
  line-height: 1.65;
}

/* ── OS Compatibility Grid ───────────────── */
.os-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 20px;
}
.os-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  padding: 30px 28px;
  transition: border-color .3s;
}
.os-card--primary {
  border-color: var(--border-accent);
  position: relative;
  overflow: hidden;
}
.os-card--primary::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hot));
}
.os-card:hover {
  border-color: var(--border-accent);
}
.os-card__header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 18px;
}
.os-card__icon {
  font-size: 2rem;
  line-height: 1;
}
.os-card__header h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
}
.os-card__badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .62rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  padding: 3px 10px;
  border-radius: 40px;
  margin-top: 2px;
}
.os-card__badge--full {
  background: rgba(102,217,160,0.14);
  color: var(--green);
}
.os-card__badge--partial {
  background: rgba(245,166,65,0.14);
  color: var(--accent);
}
.os-card ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.os-card ul li {
  font-size: .88rem;
  color: var(--text-secondary);
  line-height: 1.6;
  padding-left: 18px;
  position: relative;
}
.os-card ul li::before {
  content: '›';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.os-card h4 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .95rem;
  margin-top: 20px;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.os-card__verdict {
  margin-top: 16px;
  padding: 10px 16px;
  background: rgba(102,217,160,0.08);
  border: 1px solid rgba(102,217,160,0.18);
  border-radius: var(--r-sm);
  font-size: .85rem;
  font-weight: 500;
  color: var(--green);
}

/* ── Code Block ──────────────────────────── */
.code-block {
  background: var(--bg-deep);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  overflow-x: auto;
  margin-top: 8px;
}
.code-block pre {
  padding: 18px 20px;
  margin: 0;
}
.code-block code {
  font-family: var(--font-mono);
  font-size: .8rem;
  line-height: 1.7;
  color: var(--text-secondary);
  background: none;
  padding: 0;
  border-radius: 0;
  white-space: pre;
}

/* ── FAQ ─────────────────────────────────── */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 16px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  overflow: hidden;
  transition: border-color .3s;
}
.faq-item[open] {
  border-color: var(--border-accent);
}
.faq-item summary {
  cursor: pointer;
  padding: 18px 22px;
  font-size: .92rem;
  font-weight: 500;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background .2s;
  user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--accent);
  flex-shrink: 0;
  margin-left: 12px;
  transition: transform .3s;
}
.faq-item[open] summary::after {
  content: '−';
}
.faq-item summary:hover {
  background: var(--bg-elevated);
}
.faq-a {
  padding: 0 22px 20px;
  overflow: hidden;
}
.faq-a p {
  color: var(--text-secondary);
  font-size: .88rem;
  line-height: 1.7;
}

/* ── Troubleshooting ─────────────────────── */
.trouble-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 16px;
}
.trouble-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  overflow: hidden;
  transition: border-color .3s, box-shadow .3s;
}
.trouble-item:hover {
  border-color: var(--border-accent);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
}
.trouble-item__header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 24px 0;
}
.trouble-item__icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: .85rem;
  font-weight: 700;
  flex-shrink: 0;
}
.trouble-item__icon.red {
  background: rgba(240,96,96,0.12);
  color: var(--red);
}
.trouble-item__icon.orange {
  background: rgba(245,166,65,0.12);
  color: var(--accent);
}
.trouble-item__header h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .98rem;
}
.trouble-item__body {
  padding: 14px 24px 22px;
}
.trouble-item__body p {
  color: var(--text-secondary);
  font-size: .88rem;
  line-height: 1.65;
  margin-bottom: 8px;
}
.trouble-item__body ol {
  padding-left: 20px;
  margin-top: 6px;
}
.trouble-item__body ol li {
  color: var(--text-secondary);
  font-size: .86rem;
  line-height: 1.65;
  margin-bottom: 4px;
}

/* ── Advanced Grid ───────────────────────── */
.adv-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 16px;
}
.adv-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-md);
  padding: 24px 22px;
  transition: border-color .3s, transform .25s, box-shadow .3s;
}
.adv-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.3);
}
.adv-card h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 8px;
}
.adv-card p {
  color: var(--text-secondary);
  font-size: .86rem;
  line-height: 1.65;
}

/* ── Glossary ────────────────────────────── */
.glossary-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 12px;
  margin-top: 16px;
}
.glossary-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--r-sm);
  padding: 18px 20px;
  transition: border-color .25s;
}
.glossary-item:hover {
  border-color: var(--border-accent);
}
.glossary-item strong {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .92rem;
  color: var(--accent);
  display: block;
  margin-bottom: 6px;
}
.glossary-item p {
  color: var(--text-secondary);
  font-size: .84rem;
  line-height: 1.6;
}

/* ── Responsive ──────────────────────────── */
@media (max-width: 600px) {
  .pipeline-flow { padding-left: 20px; }
  .pipeline-flow::before { left: 10px; }
  .pipeline-step { flex-direction: column; gap: 10px; }
  .os-card { padding: 22px 18px; }
  .adv-grid { grid-template-columns: 1fr; }
  .glossary-list { grid-template-columns: 1fr; }
}