* { box-sizing: border-box; }
body {
  margin: 0;
  background: #fff;
  color: #222;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.7;
}
.container {
  width: min(760px, calc(100% - 32px));
  margin: 48px auto;
}
.narrow { max-width: 600px; }
h1 {
  margin: 0 0 16px;
  font-size: clamp(24px, 5vw, 34px);
  line-height: 1.35;
}
.lead { margin-bottom: 28px; color: #555; }
form { display: grid; gap: 18px; }
label { display: grid; gap: 6px; font-weight: 700; }
label span {
  display: inline-block;
  width: fit-content;
  padding: 1px 7px;
  border: 1px solid #222;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  margin-left: 6px;
}
input, textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid #bbb;
  border-radius: 6px;
  font: inherit;
  background: #fff;
}
textarea { resize: vertical; }
button {
  appearance: none;
  border: 0;
  border-radius: 6px;
  padding: 14px 20px;
  background: #111;
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}
button.secondary {
  background: #eee;
  color: #222;
}
.buttons {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.errors {
  padding: 12px 16px;
  border: 1px solid #c00;
  background: #fff5f5;
  color: #900;
  margin: 0 0 20px;
}
.errors p { margin: 0; }
.confirm {
  border-top: 1px solid #ddd;
  margin: 0 0 24px;
}
.confirm dt {
  font-weight: 700;
  padding: 16px 0 4px;
  border-top: 1px solid #eee;
}
.confirm dd {
  margin: 0;
  padding: 0 0 16px;
  border-bottom: 1px solid #eee;
  white-space: normal;
}
.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}
a { color: #111; }
@media (max-width: 560px) {
  .container { margin: 28px auto; width: min(100% - 24px, 760px); }
  button { width: 100%; }
  .buttons { display: grid; }
}