/* ── CERT SELECTOR ── */
.cert-selector-wrap {
  background: #0a1829;
  border-bottom: 1px solid rgba(30,115,190,0.2);
  padding: .9rem 2.5rem;
  display: flex;
  align-items: center;
  gap: 1.2rem;
  position: sticky;
  top: 64px;
  z-index: 90;
}
.cert-selector-label {
  font-family: 'Roboto Mono', monospace;
  font-size: .58rem;
  font-weight: 700;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: #8aaccc;
  white-space: nowrap;
}
.cert-selector {
  display: flex;
  gap: .4rem;
  flex-wrap: wrap;
}
.cs-btn {
  background: none;
  border: 1px solid rgba(30,115,190,0.25);
  color: #8aaccc;
  border-radius: 3px;
  padding: .4rem 1rem;
  font-family: 'Open Sans', sans-serif;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: all .2s;
}
.cs-btn:hover { border-color: #1e73be; color: #b0c8e0; }
/* Cert-specific active states matching depth-zone accent colours */
.cs-btn.active[data-cert="ow"]  { background: rgba(0,214,143,0.12);  border-color: rgba(0,214,143,0.5);  color: #00d68f; }
.cs-btn.active[data-cert="aow"] { background: rgba(37,160,232,0.12); border-color: rgba(37,160,232,0.5); color: #25a0e8; }
.cs-btn.active[data-cert="tec"] { background: rgba(232,48,74,0.12);  border-color: rgba(232,48,74,0.5);  color: #e8304a; }
/* Wrap indicator bar changes colour to match active cert */
.cert-selector-wrap[data-active-cert="ow"]  { border-bottom-color: rgba(0,214,143,0.35); }
.cert-selector-wrap[data-active-cert="aow"] { border-bottom-color: rgba(37,160,232,0.35); }
.cert-selector-wrap[data-active-cert="tec"] { border-bottom-color: rgba(232,48,74,0.35); }
.cert-upsell {
  background: linear-gradient(135deg, rgba(0,214,143,0.06), transparent);
  border: 1px solid rgba(0,214,143,0.2);
  border-radius: 6px;
  padding: 2rem 2.5rem;
  margin: 0 2.5rem 2rem;
}
.cert-upsell h3 {
  font-size: 1.2rem;
  font-weight: 800;
  margin-bottom: .6rem;
}
.cert-upsell p {
  font-size: .88rem;
  color: #8aaccc;
  line-height: 1.7;
  max-width: 680px;
  margin-bottom: 1.2rem;
}
.cert-upsell-courses {
  display: flex;
  gap: .8rem;
  flex-wrap: wrap;
}
.upsell-course-pill {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: rgba(30,115,190,0.12);
  border: 1px solid rgba(30,115,190,0.3);
  color: #b0c8e0;
  border-radius: 3px;
  padding: .45rem 1rem;
  font-size: .78rem;
  font-weight: 700;
  text-decoration: none;
  transition: all .2s;
}
.upsell-course-pill:hover { border-color: #00bfff; color: #fff; }
.upsell-course-pill.highlight {
  background: rgba(0,214,143,0.1);
  border-color: rgba(0,214,143,0.4);
  color: #00d68f;
}
@media (max-width: 900px) {
  .cert-selector-wrap { padding: .7rem 1.2rem; top: 56px; }
  .cert-upsell { margin: 0 1.2rem 1.5rem; padding: 1.5rem; }
}