:root {
  --fundo: #f4f6fb;
  --cartao: #ffffff;
  --texto: #1d2333;
  --suave: #6b7387;
  --destaque: #2f6fed;
  --borda: #e2e6ef;
}
@media (prefers-color-scheme: dark) {
  :root {
    --fundo: #12151d;
    --cartao: #1b202b;
    --texto: #e8ebf2;
    --suave: #9aa2b5;
    --destaque: #5b8ff5;
    --borda: #2b3240;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, sans-serif;
  background: var(--fundo);
  color: var(--texto);
}
main { max-width: 640px; margin: 0 auto; padding: 40px 16px; }
h1 { margin: 0 0 4px; }
.sub { color: var(--suave); margin: 0 0 24px; }
.cartao {
  background: var(--cartao);
  border: 1px solid var(--borda);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
}
.cartao h2 { margin-top: 0; font-size: 1.1rem; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: 6px 16px; margin: 0; }
dt { color: var(--suave); }
dd { margin: 0; font-family: ui-monospace, monospace; word-break: break-all; }
form { display: flex; gap: 8px; margin-bottom: 12px; }
input {
  flex: 1; min-width: 0; padding: 10px; border-radius: 8px;
  border: 1px solid var(--borda); background: var(--fundo); color: var(--texto);
}
button {
  padding: 10px 14px; border: 0; border-radius: 8px;
  background: var(--destaque); color: #fff; cursor: pointer;
}
ul { list-style: none; padding: 0; margin: 0; }
li {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 0; border-top: 1px solid var(--borda);
}
li span { flex: 1; cursor: pointer; }
li.feita span { text-decoration: line-through; color: var(--suave); }
li button { background: transparent; color: var(--suave); padding: 4px 8px; }