#header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 0 18px;
  background: rgba(255, 255, 255, .8);
  border-bottom: 1px solid rgba(215, 224, 234, .9);
  backdrop-filter: blur(14px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, .7) inset;
  position: relative;
  z-index: 4000;
  overflow: visible;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  white-space: nowrap;
}

.brand-title {
  font-family: var(--font-head);
  font-weight: 700;
  letter-spacing: -.04em;
  font-size: 15px;
}

.brand-sub {
  font-size: 11px;
  color: var(--muted);
}

@media (max-width: 720px) {
  #header {
    flex-wrap: wrap;
    height: auto;
    padding: 12px 14px;
    gap: 10px;
  }

  .header-search {
    order: 3;
    width: 100%;
    max-width: none;
    flex-basis: 100%;
  }

  .header-right {
    margin-left: 0;
    width: 100%;
    justify-content: space-between;
  }

  .nav-tabs {
    width: 100%;
    overflow: auto;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  #panel {
    grid-template-rows: auto minmax(320px, 48vh);
  }

  #modal {
    width: 100%;
    border-radius: 20px;
  }
}

/* ==========================================================================
   ROLE-BASED ACCESS CONTROL (RBAC) VISIBILITY
   ========================================================================== */
.sidebar {
  width: 260px;
  background: #0f172a;
  color: #cbd5e1;
  display: flex;
  flex-direction: column;
  height: 100vh;
  position: fixed;
  left: 0;
  top: 0;
  z-index: 5000;
  border-right: 1px solid #1e293b;
  font-family: var(--font);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 20px;
  border-bottom: 1px solid #1e293b;
}

.brand-icon {
  font-size: 26px;
}

.sidebar-brand .brand-title {
  color: #fff;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: -.03em;
  margin: 0;
}

.sidebar-brand .brand-sub {
  font-size: 11px;
  color: #64748b;
}

.sidebar-nav {
  flex: 1;
  padding: 24px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  color: #94a3b8;
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  border-radius: 12px;
  transition: all .2s ease;
}

.sidebar-nav .nav-item:hover {
  background: #1e293b;
  color: #fff;
}

.sidebar-nav .nav-item.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 12px rgba(22, 93, 255, 0.25);
}

.sidebar-footer {
  padding: 20px;
  border-top: 1px solid #1e293b;
  display: flex;
  flex-direction: column;
  gap: 14px;
}