body {
  font-family: Arial, sans-serif;
  margin: 20px;
}
h1 {
  margin-bottom: 20px;
}
nav ul {
  list-style: none;
  padding: 0;
  margin-bottom: 20px;
}
nav li {
  display: inline;
  margin-right: 15px;
}
table {
  border-collapse: collapse;
  width: 100%;
  margin-bottom: 20px;
}
th, td {
  border: 1px solid #ccc;
  padding: 8px;
  text-align: left;
}
form.inline {
  display: inline;
}
.message {
  margin-bottom: 10px;
  padding: 10px;
  border-radius: 4px;
}
.message.success {
  background: #e1f3e1;
  border: 1px solid #8bc48b;
}
.message.error {
  background: #f9e1e1;
  border: 1px solid #e08b8b;
}
label {
  display: block;
  margin: 5px 0;
}
input[type="text"],
input[type="number"],
input[type="date"],
input[type="time"],
input[type="datetime"],
input[type="varchar"],
input[type="decimal"] {
  width: 200px;
}
button {
  margin-top: 10px;
}