* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  margin: 0;
  background: #f4f6f8;
  color: #1a1a1a;
  line-height: 1.5;
}

header {
  background: #0078d4;
  color: #fff;
  padding: 1rem 1.5rem;
}

header h1 {
  margin: 0;
  font-size: 1.25rem;
}

main {
  max-width: 900px;
  margin: 1.5rem auto;
  padding: 0 1rem 2rem;
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.card h2 {
  margin-top: 0;
  font-size: 1.1rem;
}

button {
  background: #0078d4;
  color: #fff;
  border: none;
  border-radius: 4px;
  padding: 0.5rem 1rem;
  cursor: pointer;
  font-size: 0.95rem;
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
}

button.secondary {
  background: #605e5c;
}

button.danger {
  background: #a4262c;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

input,
textarea {
  width: 100%;
  padding: 0.5rem;
  margin: 0.25rem 0 0.75rem;
  border: 1px solid #ccc;
  border-radius: 4px;
  font: inherit;
}

pre {
  background: #f0f0f0;
  padding: 0.75rem;
  border-radius: 4px;
  overflow-x: auto;
  font-size: 0.85rem;
}

.task-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  border-bottom: 1px solid #eee;
  padding: 0.75rem 0;
}

.task-item:last-child {
  border-bottom: none;
}

.muted {
  color: #666;
  font-size: 0.9rem;
}

.error {
  color: #a4262c;
}

.success {
  color: #107c10;
}

footer {
  max-width: 900px;
  margin: 0 auto 2rem;
  padding: 0 1rem;
  font-size: 0.85rem;
  color: #666;
}

a {
  color: #0078d4;
}