body {
  font-family: system-ui, sans-serif;
  max-width: 640px;
  margin: 0 auto;
  padding: 0 1rem;
  color: #222;
}

.site-header {
  padding: 1rem 0;
  border-bottom: 1px solid #ddd;
  margin-bottom: 1.5rem;
}

.site-header a {
  font-weight: bold;
  text-decoration: none;
  color: #222;
}

.note-list {
  list-style: none;
  padding: 0;
}

.note-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid #eee;
}

.note-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 400px;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: #2563eb;
  color: #fff;
  border: none;
  border-radius: 4px;
  text-decoration: none;
  cursor: pointer;
  width: fit-content;
}

.btn-danger {
  background: #dc2626;
}