body {
  background: linear-gradient(180deg, #f8fafc 0%, #f1f5f9 100%);
  color: #334155;
}

.panel,
.panel_s {
  border: 1px solid #e2e8f0;
  border-radius: 16px;
  box-shadow: 0 12px 30px rgba(15, 23, 42, 0.06);
  overflow: hidden;
}

.panel-heading {
  background: linear-gradient(90deg, #f8fafc 0%, #ffffff 100%);
  border-bottom: 1px solid #e2e8f0;
}

.panel-title {
  font-weight: 600;
  color: #0f172a;
}

.btn,
.btn-group > .btn {
  border-radius: 10px;
  padding-top: 0.55rem;
  padding-bottom: 0.55rem;
  transition: all 0.2s ease-in-out;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
}

.btn:hover,
.btn-group > .btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(15, 23, 42, 0.08);
}

.btn-primary {
  background: #111827;
  border-color: #111827;
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-control,
select.form-control,
textarea.form-control {
  border-radius: 10px;
  border-color: #cbd5e1;
  background-color: #fff;
  box-shadow: inset 0 1px 2px rgba(15, 23, 42, 0.03);
}

.form-control:focus,
select.form-control:focus,
textarea.form-control:focus {
  border-color: #2563eb;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.table > thead > tr > th {
  background-color: #f8fafc;
  color: #334155;
  font-weight: 600;
}

.table > tbody > tr:hover {
  background-color: #f8fafc;
}

.alert {
  border-radius: 12px;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.05);
}

.submenu li a {
  padding: 8px 12px;
  border-radius: 999px;
  transition: all 0.2s ease-in-out;
}

.submenu li a:hover,
.submenu li a:focus,
.submenu li a:active {
  background: #f8fafc;
  color: #0f172a !important;
}