body {
  margin: 0;
  background: #0d0509;
  color: #FFF0F3;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.6;
}
main {
  max-width: 680px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}
h1 { color: #FF4D6D; }
a { color: #FF8FA3; }
.todo {
  background: rgba(255,77,109,0.15);
  border: 1px solid #FF4D6D;
  border-radius: 8px;
  padding: 12px 16px;
  font-weight: 600;
  margin: 16px 0;
}
nav a { margin-right: 16px; font-size: 13px; }