body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f5f5f5;
}

header {
  background: #004aad;
  color: #fff;
  padding: 10px 20px;
}

header h1 {
  margin: 0;
  font-size: 20px;
}

nav a {
  color: #fff;
  margin-right: 10px;
  text-decoration: none;
  font-size: 14px;
}

nav a:hover {
  text-decoration: underline;
}

main {
  padding: 20px;
}

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

table th, table td {
  border: 1px solid #ddd;
  padding: 6px 8px;
  font-size: 14px;
}

table th {
  background: #eee;
}

.btn {
  display: inline-block;
  padding: 6px 10px;
  background: #004aad;
  color: #fff;
  text-decoration: none;
  border-radius: 3px;
  font-size: 14px;
}

.btn:hover {
  opacity: 0.9;
}

form {
  background: #fff;
  padding: 15px;
  max-width: 500px;
}

form label {
  display: block;
  margin-bottom: 10px;
  font-size: 14px;
}

form input[type="text"],
form textarea,
form select {
  width: 100%;
  padding: 6px;
  box-sizing: border-box;
  margin-top: 4px;
}

button {
  padding: 8px 14px;
  background: #004aad;
  color: #fff;
  border: none;
  border-radius: 3px;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

.alert {
  background: #dff0d8;
  color: #3c763d;
  padding: 10px;
  margin-bottom: 15px;
  border-radius: 3px;
}

.box {
  background: #fff;
  padding: 15px;
  margin-bottom: 15px;
}

footer {
  text-align: center;
  padding: 10px;
  font-size: 12px;
  color: #666;
}