body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background-color: #f4f4f4;
  color: #333;
}

.navbar {
  display: flex;
  align-items: center;
  background-color: #fff;
  padding: 10px 30px;
  border-bottom: 1px solid #ccc;
}

.logo {
  height: 60px;
  margin-right: 20px;
}

.container {
  max-width: 900px;
  margin: 40px auto;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 0 20px rgba(0,0,0,0.05);
}

h1, h2 {
  color: #2c3e50;
}

a {
  color: #3498db;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul {
  list-style-type: none;
  padding: 0;
}

ul li {
  margin-bottom: 10px;
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
  background: #fff;
}

th, td {
  padding: 12px;
  border-bottom: 1px solid #ddd;
  text-align: left;
}

th {
  background-color: #3498db;
  color: white;
}

input[type="number"], select {
  padding: 8px;
  width: 200px;
  margin-bottom: 12px;
}

input[type="submit"] {
  background-color: #2ecc71;
  color: white;
  padding: 10px 20px;
  border: none;
  border-radius: 4px;
  cursor: pointer;
}

input[type="submit"]:hover {
  background-color: #27ae60;
}

.low-stock {
  color: red;
  font-weight: bold;
}