/* ── Accordion menu sidebar ─────────────────────────────── */
.nav-accordion {
  border: none;
  margin: 4px 0 0;
}

.nav-accordion-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  margin: 0 0 2px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: #8892a4;
  text-transform: uppercase;
  cursor: pointer;
  list-style: none;
  user-select: none;
  transition: color 0.15s, background 0.15s;
  border-radius: 8px;
  background: rgba(255,255,255,0.04);
  border-left: 3px solid rgba(255,255,255,0.12);
  width: 100%;
}
.nav-accordion-header::-webkit-details-marker { display: none; }
.nav-accordion-header::marker { display: none; }

.nav-accordion-header:hover {
  color: #e8eaf0;
  background: rgba(255,255,255,0.06);
  border-left-color: rgba(255,255,255,0.3);
}

details.nav-accordion[open] > .nav-accordion-header {
  color: #ffffff;
  border-left-color: #002395;
  background: rgba(0,35,149,0.2);
}

.nav-accordion-arrow {
  font-size: 10px;
  transition: transform 0.2s ease;
  display: inline-block;
  opacity: 0.6;
  flex-shrink: 0;
}

details.nav-accordion[open] .nav-accordion-arrow {
  transform: rotate(90deg);
  opacity: 1;
}

.nav-accordion-body {
  overflow: hidden;
  animation: slideDown 0.18s ease;
  padding: 2px 0 4px;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.nav-accordion-body .nav-item {
  padding-left: 24px !important;
}