body {
  font-family: system-ui, sans-serif;
  margin: 0;
  padding: 0;
}

nav {
  background: #f5f5f5;
  padding: 0.75rem 1rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  border-bottom: 1px solid #ddd;
}

nav a {
  text-decoration: none;
  color: #333;
}

main {
  padding: 1rem;
  max-width: 1200px;
  margin: 0 auto;
}

.flash {
  padding: 0.75rem 1rem;
  margin: 0.5rem 1rem;
  border-radius: 4px;
}

.flash.success {
  background: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.flash.error {
  background: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th, td {
  text-align: left;
  padding: 0.5rem;
  border-bottom: 1px solid #ddd;
}

button {
  cursor: pointer;
}