todoapp.css

html {
  font-family: sans-serif;
}

body {
  margin: 0;
}

form {
  width: 90%;
  max-width: 40rem;
  margin: 2rem auto;
}

.form-control {
  margin-bottom: 1rem;
}

label,
input {
  display: block;
  width: 100%;
}

label {
  font-weight: bold;
}

input {
  font: inherit;
  border: 1px solid #ccc;
  padding: 0.25rem;
}

input:focus {
  outline: none;
  border-color: #50005a;
}

button {
  background: #50005a;
  border: 1px solid #50005a;
  color: white;
  padding: 0.5rem 1.5rem;
  cursor: pointer;
}

button:focus {
  outline: none;
}

button:hover,
button:active {
  background: #6a0a77;
  border-color: #6a0a77;
}

ul {
  list-style: none;
  width: 90%;
  max-width: 40rem;
  margin: 2rem auto;
  padding: 0;
}

li {
  margin: 1rem 0;
  padding: 1rem;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.26);
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}