@import url('https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css');

body {
  font-family: 'Segoe UI', sans-serif;
  background-color: #f8f9fa;
}
body {
  font-family: Arial;
  text-align: center;
  margin: 30px;
}

.sidebar {
  height: 100vh;
  width: 250px;
  background-color: #343a40;
  color: white;
  position: fixed;
  top: 0;
  left: 0;
  padding-top: 60px;
}

.sidebar a {
  color: white;
  padding: 10px;
  display: block;
  text-decoration: none;
}

.sidebar a:hover {
  background-color: #495057;
}

.main-content {
  margin-left: 250px;
  padding: 20px;
}

.navbar {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 999;
}

.card {
  width: 300px;
  margin: auto;
  padding: 20px;
  border: 1px solid gray;
  border-radius: 8px;
}
input {
  padding: 10px;
  margin: 5px;
  width: 90%;
}
button {
  padding: 10px 20px;
}
table {
  width: 80%;
  margin: auto;
  border-collapse: collapse;
}
table, th, td {
  border: 1px solid gray;
}
th, td {
  padding: 10px;
}
.error {
  color: red;
}