[hidden] { display: none !important; }

#btnMenu { display: none; }

.csp-nav-group summary {
  cursor: pointer;
  list-style: none;
}

.csp-nav-group summary::-webkit-details-marker { display: none; }

.csp-chevron {
  margin-left: auto;
  font-size: 0.7rem;
  transition: transform 0.2s;
}

.csp-nav-group[open] .csp-chevron { transform: rotate(180deg); }

.csp-subnav {
  margin: 0.15rem 0 0.4rem 0.9rem;
  padding-left: 0.3rem;
  border-left: 1px solid rgba(255, 255, 255, 0.15);
}

.csp-subnav .nav-item {
  font-size: 0.78rem;
  padding: 0.32rem 0.5rem;
}

.page-placeholder {
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 1.5rem;
  text-align: center;
  color: var(--text-secondary);
}

.page-placeholder i {
  display: block;
  font-size: 2rem;
  color: var(--vga-primary);
  margin-bottom: 0.75rem;
}

@media (max-width: 700px) {
  #btnMenu { display: inline-flex; }

  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 100;
    transform: translateX(-100%);
    width: 250px !important;
    max-width: 85vw;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.45);
    transition: transform 0.2s ease;
  }

  .sidebar.open { transform: translateX(0); }

  .main {
    margin-left: 0 !important;
    width: 100%;
  }

  .content { padding: 1rem; }
  .topbar { padding: 0.7rem; }
  .topbar-date { display: none; }
}