:root {
    --color-primary: #3A5AD6;
    --color-primary-hover: #2f4bb5;
    --color-secondary: #6c757d;
    --color-success: #198754;
    --color-danger: #dc3545;
    --color-warning: #ffc107;
    --color-info: #0dcaf0;
    --color-light: #f8f9fa;
    --color-dark: #212529;
}

/* Highlight hoặc active state */
.active-primary {
    color: var(--color-primary) !important;
    border-bottom: 2px solid var(--color-primary) !important;
}

/* Nền dùng màu chủ đạo */
.bg-primary-color {
    background-color: var(--color-primary) !important;
    color: var(--color-on-primary) !important;
}

.btn-theme-primary {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-on-primary);
    transition: background-color 0.2s ease;
    color: var(--color-light);
}

.btn-theme-primary:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    color: var(--color-light);
}

#loading-overlay {
    position: fixed;
    inset: 0;
    z-index: 1050;
    display: none;
}

.loading-backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(255, 255, 255, 0.8);
}

.loading-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.loading-text {
    font-size: 16px;
    color: #333;
}

.required:after {
  content: "*";
  margin-left: 0.25rem;
  color: #d63939;
}

.toast-success {
  background-color: #28a745 !important;
  color: white !important;
  border-left: 5px solid #1e7e34;
  border-radius: 8px;
  font-weight: 500;
}

.toast-error {
  background-color: #dc3545 !important;
  color: white !important;
  border-left: 5px solid #bd2130;
  border-radius: 8px;
  font-weight: 500;
}

.toast-info {
  background-color: #17a2b8 !important;
  color: white !important;
  border-left: 5px solid #117a8b;
  border-radius: 8px;
  font-weight: 500;
}

.toast-warning {
  background-color: #ffdc8a !important; /* cam nhạt */
  color: #5c4400 !important; /* chữ tối vừa */
  border-left: 5px solid #e0a400;
  border-radius: 8px;
  font-weight: 500;
}