.sidebar-settings-popup {
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid #d8e4ff;
  box-shadow: 0 20px 42px rgba(21, 73, 161, 0.22);
  background: linear-gradient(165deg, #f8fbff 0%, #f0f6ff 100%);
}

.sidebar-settings-popup .popup-header {
  padding: 14px 16px;
  background: linear-gradient(125deg, #0f5bd7 0%, #1477d5 55%, #13a6b8 100%);
  border-radius: 0;
}

.sidebar-settings-popup .popup-header h3 {
  color: #fff;
  font-size: 1.05rem;
}

.sidebar-settings-popup .popup-header .close {
  opacity: 0.88;
}

.sidebar-settings-popup .popup-body {
  padding: 16px;
}

.sidebar-settings-popup .popup-body h4 {
  margin: 0 0 14px;
  color: #173f72;
  font-size: 1rem;
}

.sidebar-settings-popup .sidebar-width-btn {
  background: #fff;
  color: #294468;
  border: 1px solid #cddcff;
  border-radius: 10px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 9px 10px;
  transition: transform 0.18s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.sidebar-settings-popup .sidebar-width-btn:hover {
  transform: translateY(-1px);
  border-color: #8fbcff;
  box-shadow: 0 10px 18px rgba(37, 82, 165, 0.16);
}

.sidebar-settings-popup .sidebar-width-btn.active {
  background: linear-gradient(135deg, #0f67de 0%, #1694c6 100%);
  color: #fff;
  border: 1px solid #0f67de;
  box-shadow: 0 10px 18px rgba(16, 108, 209, 0.32);
}

.sidebar-settings-popup .sidebar-width-btn[data-width="hidden"].active {
  background: linear-gradient(135deg, #d54f56 0%, #de6758 100%);
  border: 1px solid #d54f56;
  box-shadow: 0 10px 18px rgba(213, 79, 86, 0.3);
}

.sidebar-settings-popup .option-row {
  border: 1px solid #d8e4ff;
  background: #fff;
  border-radius: 10px;
  padding: 10px 12px;
}

.sidebar-settings-popup .option-row:hover {
  border-color: #8fbcff;
  background: #f8fcff;
}

.sidebar-settings-popup #sidebar-preview {
  margin-top: 10px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #d8e4ff;
  background: #fff;
  color: #34557c;
  font-size: 0.9rem;
}

.sidebar-settings-popup .actions {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.sidebar-settings-popup .actions .sidebar-settings-action-btn {
  border-radius: 10px;
  border: none;
  font-weight: 600;
  padding: 10px 14px;
  transition: transform 0.18s ease, box-shadow 0.2s ease;
}

.sidebar-settings-popup .actions .sidebar-settings-action-btn:hover {
  transform: translateY(-1px);
}

@media (max-width: 700px) {
  .sidebar-settings-popup .grid-2 {
    grid-template-columns: 1fr;
  }
}