body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: #f0f2f5;
  margin: 0;
  padding: 40px 20px;
}

.container {
  max-width: 500px;
  margin: 0 auto;
  background: white;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

h1 {
  text-align: center;
  color: #1a1a1a;
  margin-bottom: 24px;
}

.input-row {
  display: flex;
  gap: 10px;
  margin-bottom: 24px;
}

#task-input {
  flex: 1;
  padding: 12px 16px;
  font-size: 16px;
  border: 1px solid #ddd;
  border-radius: 8px;
}

button {
  padding: 12px 24px;
  background: #0066ff;
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #0055dd;
}

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

li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: #fafafa;
  margin-bottom: 10px;
  border-radius: 8px;
  border: 1px solid #eee;
}

.delete-btn {
  background: #ff4d4f;
  color: white;
  border: none;
  padding: 8px 16px;
  border-radius: 6px;
  cursor: pointer;
}

.delete-btn:hover {
  background: #d9363e;
}

.empty {
  text-align: center;
  color: #999;
  font-style: italic;
  padding: 40px 0;
}