* {
  box-sizing: border-box;
}
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  font-family: system-ui, sans-serif;
  background: #f4f7fb;
  color: #1b2a41;
}
.page {
  width: min(100% - 32px, 440px);
  text-align: center;
}
.logo {
  width: 200px;
  height: auto;
}
h1 {
  margin: 12px 0 4px;
  font-size: 36px;
}
.lead {
  margin: 0 0 24px;
  color: #0769ad;
  font-style: italic;
}
form {
  display: flex;
  gap: 8px;
}
input {
  flex: 1;
  font: inherit;
  padding: 10px 12px;
  border: 1px solid #c9d6e5;
  border-radius: 8px;
}
button {
  font: inherit;
  font-weight: 600;
  padding: 10px 16px;
  border: 0;
  border-radius: 8px;
  background: #0769ad;
  color: white;
  cursor: pointer;
}
button:hover {
  background: #0a5a8f;
}
ul {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  text-align: left;
}
li {
  padding: 12px 14px;
  margin-bottom: 8px;
  background: white;
  border-radius: 8px;
  box-shadow: 0 1px 3px #1b2a4114;
  cursor: pointer;
}
li.done {
  text-decoration: line-through;
  color: #8a99ad;
}
code {
  font-size: 0.9em;
}