body {
  background: #f4f6f9;
  font-family: Arial, sans-serif;
}

/* Card */
.card {
  border-radius: 14px;
  overflow: hidden;
}

.card-header {
  padding: 18px;
}

/* Tabs */
.nav-tabs .nav-link {
  font-weight: 600;
  color: #495057;
  border: none;
  border-bottom: 3px solid transparent;
  transition: 0.3s;
}

.nav-tabs .nav-link.active {
  color: #0d6efd;
  border-bottom: 3px solid #0d6efd;
  background: #fff;
}

.nav-tabs .nav-link:hover {
  color: #0d6efd;
}

/* Form */
.form-label {
  font-weight: 600;
  color: #343a40;
}

.form-control,
.form-select {
  border-radius: 10px;
  min-height: 44px;
}

textarea.form-control {
  min-height: 100px;
}

/* Buttons */
.btn {
  border-radius: 10px;
  font-weight: 600;
}

.btn-primary,
.btn-success,
.btn-warning {
  padding: 10px 18px;
}

/* DataTables */
.dataTables_wrapper {
  margin-top: 20px;
}

table.dataTable {
  width: 100% !important;
  border-collapse: collapse !important;
}

table.dataTable thead th {
  background: #212529;
  color: #fff;
  text-align: center;
  vertical-align: middle;
}

table.dataTable tbody td {
  vertical-align: middle;
}

/* Export Buttons */
.dt-buttons .dt-button {
  background: #0d6efd !important;
  border: none !important;
  color: white !important;
  border-radius: 8px !important;
  padding: 8px 14px !important;
  margin-right: 5px !important;
}

.dt-buttons .dt-button:hover {
  opacity: 0.9;
}

/* Modal */
.modal-content {
  border-radius: 14px;
}

.modal-header {
  border-bottom: none;
}

.modal-footer {
  border-top: none;
}

/* Alert */
.alert {
  border-radius: 10px;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .container-fluid {
    padding: 10px;
  }

  h3 {
    font-size: 20px;
  }

  .btn {
    width: 100%;
  }

  .dt-buttons {
    margin-bottom: 10px;
  }
}