body {
    background: #f4f7fc;
  }

  h1, h2 {
    color: #1f4e79;
  }

  .hero-section {
    background: linear-gradient(to right, #3b8beb, #6ec6ff);
    color: white;
    padding: 2rem;
    border-radius: 1rem;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
  }

  .accordion-button {
    font-weight: bold;
  }

  .accordion-item:nth-child(odd) .accordion-button {
    background-color: #e3f2fd;
  }

  .accordion-item:nth-child(even) .accordion-button {
    background-color: #f1f8e9;
  }

  .accordion-body {
    background-color: #ffffff;
    border-top: 1px solid #dee2e6;
  }

  table thead {
    background-color: #1f4e79;
    color: white;
  }

  .table-bordered td {
    background-color: #ffffff;
  }

  .form-select {
    background-color: #f0f8ff;
  }

  #certificateModal .modal-content {
    background: #f9f9f9;
    border: 4px solid #66aaff;
  }

  .list-group-item {
  background-color: #f8fbff;
  border-left: 4px solid #3b8beb;
}





/* === Nubian Custom Modal === */
.nub-modal {
  display: none; /* hidden by default */
  position: fixed;
  inset: 0;
  z-index: 1000;
  justify-content: center;
  align-items: center;
  font-family: Arial, sans-serif;
}

.nub-modal.nub-show {
  display: flex;
}

.nub-modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
}

.nub-modal-content {
  position: relative;
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  max-width: 500px;
  width: 90%;
  z-index: 1001;
  box-shadow: 0 10px 30px rgba(0,0,0,0.2);
  animation: nub-fadeIn 0.3s ease;
}

.nub-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.nub-modal-title {
  font-size: 1.25rem;
  margin: 0;
}

.nub-modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: #444;
}

.nub-modal-body {
  font-size: 1rem;
}

.nub-form-group {
  margin-bottom: 1rem;
}

.nub-form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: bold;
}

.nub-input {
  width: 100%;
  padding: 0.6rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}

.nub-btn {
  display: inline-block;
  padding: 0.75rem 1.25rem;
  font-size: 1rem;
  border-radius: 6px;
  border: none;
  cursor: pointer;
  transition: background 0.2s ease;
}

.nub-btn-success {
  background: #28a745;
  color: #fff;
}

.nub-btn-success:hover {
  background: #218838;
}

@keyframes nub-fadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}