* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: #f2f4f7;
  color: #1f2937;
}

.container {
  max-width: 560px;
  margin: 0 auto;
  padding: 32px 16px;
}

h1 {
  margin-bottom: 24px;
}

.card {
  background: #ffffff;
  border-radius: 8px;
  padding: 20px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.card h2 {
  margin-top: 0;
  font-size: 16px;
  color: #374151;
}

form {
  display: flex;
  gap: 8px;
}

input[type="text"] {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 14px;
}

button {
  padding: 10px 16px;
  border: none;
  border-radius: 6px;
  background: #2563eb;
  color: white;
  font-size: 14px;
  cursor: pointer;
}

button:hover {
  background: #1d4ed8;
}

.message {
  min-height: 20px;
  font-size: 13px;
  margin: 8px 0 0;
}

.message.success {
  color: #15803d;
}

.message.error {
  color: #b91c1c;
}

#search-input {
  width: 100%;
}

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

li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid #f0f0f0;
}

li:last-child {
  border-bottom: none;
}

li.empty,
li.error {
  color: #6b7280;
  justify-content: flex-start;
}

.delete-btn {
  background: #ef4444;
  padding: 6px 10px;
  font-size: 12px;
}

.delete-btn:hover {
  background: #dc2626;
}