body { font: 1rem system-ui, sans-serif; line-height: 1.5; margin: 0; color: #18212b; background: #f5f7fa; }
main { max-width: 42rem; margin: 3rem auto; padding: 1.5rem; background: white; }
form { display: grid; gap: .75rem; margin: 1rem 0; }
label { display: grid; gap: .25rem; }
input, button { font: inherit; padding: .55rem; }
button { cursor: pointer; }
li { display: flex; justify-content: space-between; gap: 1rem; padding: .6rem 0; border-bottom: 1px solid #d8dee6; }
.done { text-decoration: line-through; color: #5c6977; }