body { display: flex; height: 100vh; overflow: hidden; }
#sidebar {
  width: 236px; min-width: 236px;
  display: flex; flex-direction: column;
  padding: 22px 14px; gap: 0;
  background: var(--navy);
  background-image: radial-gradient(rgba(178,229,245,0.16) 1.4px, transparent 1.4px);
  background-size: 16px 16px;
  border-right: none;
}
/* Brand logo */
.nav-header { margin-bottom: 18px; }
.nav-header .brand-logo { width: 140px; height: auto; margin-bottom: 8px; display: block; }
.nav-header h2 { display: none; }
/* Client dropdown — light on navy */
.client-dropdown {
  width: 100%; padding: 8px 10px;
  background: rgba(255,255,255,0.10); color: #fff;
  border: 1px solid rgba(255,255,255,0.18);
  border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 13px;
  cursor: pointer; margin-bottom: 20px;
}
.client-dropdown:focus { outline: none; border-color: var(--signal); }
.client-dropdown option { color: var(--navy); background: #fff; }
/* Nav tabs */
.nav-tabs { display: flex; flex-direction: column; gap: 2px; flex: 1; }
.nav-tab {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500;
  color: rgba(255,255,255,0.60);
  transition: all 0.15s; text-align: left;
}
.nav-tab:hover { background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.90); }
.nav-tab.active {
  background: var(--signal); color: var(--navy); font-weight: 600;
}
.tab-icon { width: 20px; text-align: center; display: flex; align-items: center; justify-content: center; }
.tab-icon svg { stroke: currentColor; }
/* Chevron */
.tab-chevron { margin-left: auto; display: flex; align-items: center; transition: transform 0.2s; }
.tab-chevron svg { width: 14px; height: 14px; stroke: currentColor; }
.tab-chevron.rotated { transform: rotate(90deg); }
/* Sub-nav (report sections) */
.nav-sub {
  display: flex; flex-direction: column;
  max-height: 0; overflow: hidden; transition: max-height 0.25s ease;
  padding-left: 16px;
}
.nav-sub.expanded { max-height: 300px; }
.nav-sub-item {
  padding: 7px 12px; font-size: 12px; text-align: left;
  color: rgba(255,255,255,0.45); border-radius: 6px;
  transition: all 0.15s; font-weight: 500;
}
.nav-sub-item:hover { color: rgba(255,255,255,0.80); background: rgba(255,255,255,0.06); }
.nav-sub-item.active { color: var(--signal); font-weight: 600; }
/* Footer */
.nav-footer {
  margin-top: auto; padding-top: 14px;
  border-top: 1px solid rgba(255,255,255,0.10);
}
.btn-new {
  width: 100%; padding: 8px; font-size: 13px;
  background: transparent; border: 1px solid rgba(255,255,255,0.18);
  color: rgba(255,255,255,0.55); border-radius: var(--radius-sm);
}
.btn-new:hover { border-color: var(--signal); color: var(--signal); }
.btn-new svg { stroke: currentColor; }
/* Main content */
#content { flex: 1; overflow-y: auto; padding: 28px 36px; min-height: 0; }