* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: Arial, sans-serif;
}

body {
  background: #0f172a;
  color: #e2e8f0;
  padding: 30px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
}

h1 {
  margin-bottom: 10px;
}

.subtitle {
  margin-bottom: 20px;
  color: #94a3b8;
}

.card {
  background: #1e293b;
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}

h2 {
  margin-bottom: 15px;
}

input {
  width: 100%;
  padding: 12px;
  margin-bottom: 10px;
  border: none;
  border-radius: 8px;
}

button {
  padding: 12px 16px;
  border: none;
  background: #3b82f6;
  color: white;
  border-radius: 8px;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

ul {
  list-style: none;
}

li {
  background: #334155;
  padding: 12px;
  border-radius: 8px;
  margin-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

pre {
  background: #0f172a;
  padding: 15px;
  border-radius: 8px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-word;
}

.delete-btn {
  background: #ef4444;
}