*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    background: #f8f9fa;
  }
  .login-container {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 400px;
  }
  .login-container h2 {
    text-align: center;
    margin-bottom: 1rem;
  }
  input,
  button {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid #ccc;
    border-radius: 4px;
  }
  button {
    background-color: #007bff;
    color: white;
    border: none;
  }
  #message {
    text-align: center;
    color: red;
  }

  #overlayLoader {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(255, 255, 255, 0.8);
    z-index: 9999;
    align-items: center;
    justify-content: center;
 }	

 #overlayLoader .loader {
    border: 4px solid #ccc;
    border-top: 4px solid #333;
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 0.8s linear infinite;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
}

th, td {
    padding: 0.75rem;
    border: 1px solid #dee2e6;
    text-align: left;
}

th {
    background-color: #e9ecef;
}

a.icon {
    text-decoration: none;
    color: #007bff;
    font-size: 1.2rem;
}

.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid #ccc;
    border-top: 2px solid #333;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    vertical-align: middle;
} 

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.invoiceTableContainer {
    overflow-x: auto;
}

.wrapper {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100vh;
    flex-direction: column;
}

.container_wrapper {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    max-width: 700px;
    margin: auto;
}

input, select {
  display: block;
  width: 100%;
  height: calc(1.5em + .75rem + 2px);
  padding: .375rem .75rem;
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.5;
  color: #495057;
  background-color: #fff;
  background-clip: padding-box;
  border: 1px solid #ced4da;
  border-radius: .25rem;
  transition: border-color .15s ease-in-out,box-shadow .15s ease-in-out;
  margin-bottom: 10px !important;
}

.btn.btn-primary {
  background-color: teal;
  border-color: teal;
  width: auto;
}
.btn.btn-primary:hover {
  background-color: #006b6b;
  border-color: #006b6b;
}

.header h2 {
  color: teal;
  margin-bottom: 15px;
}

.header.mt-3 {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.header .btn {
  margin-bottom: 15px;
}

nav a {
  margin-right: 10px;
}

@media screen and (max-width: 767px) { 

  .header h2 {
    color: teal;
    margin-bottom: 15px;
  }

  .header {
    flex-direction: column;
  }

 

}