:root {
  font-family: system-ui, -apple-system, sans-serif;
  color: #202124;
  background: #f5f5f5;
}
* { box-sizing: border-box; }
body { margin: 0; }
header {
  background: #d71920;
  color: white;
  padding: 1.25rem max(1.25rem, calc((100vw - 880px)/2));
  font-size: 1.35rem;
  font-weight: 750;
}
main {
  max-width: 880px;
  margin: 2rem auto;
  padding: 0 1rem;
}
h1 { font-size: 1.7rem; }
p { line-height: 1.5; }
form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  background: white;
  padding: 1.4rem;
  border: 1px solid #ddd;
  border-radius: 10px;
}
label {
  font-size: .93rem;
  font-weight: 620;
  display: flex;
  flex-direction: column;
  gap: .45rem;
}
.wide { grid-column: 1/-1; }
input, select {
  padding: .75rem;
  font: inherit;
  border: 1px solid #a7a7a7;
  border-radius: 6px;
  min-width: 0;
}
label.check {
  flex-direction: row;
  align-items: flex-start;
  font-weight: 400;
}
button {
  padding: .8rem 1.2rem;
  border: 0;
  border-radius: 6px;
  color: white;
  background: #b9151b;
  font: inherit;
  font-weight: 700;
}
button:disabled {
  opacity: .55;
  cursor: not-allowed;
}
.notice {
  background: #fff5dd;
  border-left: 4px solid #ad7a10;
  padding: 1rem;
  margin: 1rem 0 1.5rem;
}
#status { grid-column: 1/-1; }
footer {
  max-width: 880px;
  margin: 1.5rem auto;
  padding: 0 1rem;
  font-size: .85rem;
  color: #555;
}
@media(max-width:640px) {
  form { grid-template-columns: 1fr; }
  header { padding: 1rem; }
  main { margin: 1rem auto; }
}