body {
  font-family: Arial, sans-serif;
  margin: 30px;
  background-color: #f4f6f8;
}
h1 {
  text-align: center;
  color: #333;
}
#loginForm, #app {
  max-width: 600px;
  margin: 0 auto 20px auto;
  background: white;
  padding: 20px;
  border-radius: 6px;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
input[type="text"], input[type="password"] {
  width: 100%;
  padding: 10px;
  font-size: 16px;
  margin: 10px 0;
  border: 2px solid #ddd;
  border-radius: 6px;
}
button {
  padding: 10px 20px;
  font-size: 16px;
  background-color: #007bff;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
button:hover {
  background-color: #0056b3;
}
.search-container, .add-container {
  margin-top: 20px;
  text-align: center;
}
table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}
th, td {
  padding: 10px;
  border-bottom: 1px solid #eee;
  text-align: left;
}
th {
  background-color: #007bff;
  color: white;
}
tr:hover {
  background-color: #f1f9ff;
}
.deleteBtn {
  background-color: #dc3545;
  color: white;
  padding: 5px 10px;
  border-radius: 4px;
  font-size: 14px;
}
.deleteBtn:hover {
  background-color: #b02a37;
}
.error-message {
  color: red;
  font-weight: bold;
  display: none;
}
#logoutBtn {
  float: right;
  background-color: #6c757d;
}
#logoutBtn:hover {
  background-color: #5a6268;
}