* {
  box-sizing: border-box;
}
body {
  font-family: sans-serif;
  margin: 0;
  padding: 1rem;
  background: #f4f4f4;
}
main {
  max-width: 800px;
  margin: auto;
  background: #fff;
  padding: 1rem;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}
h1 {
  text-align: center;
  margin-bottom: 1rem;
}
form {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
form input,
form select {
  padding: 0.5rem;
  flex: 1;
  min-width: 120px;
}
form button {
  padding: 0.5rem 1rem;
}
#cancel-btn {
  background: #ccc;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th,
td {
  padding: 0.5rem;
  border: 1px solid #ddd;
  text-align: left;
}
th {
  background: #f0f0f0;
}
.action-btn {
  margin-right: 0.5rem;
  cursor: pointer;
  color: #007bff;
  border: none;
  background: none;
}
.action-btn.delete {
  color: #dc3545;
}
.action-btn:hover {
  text-decoration: underline;
}