:root {
  --red: #ce272e;
  --navy: #34404b;
  --ink: #333;
  --bg: #fff;
  --bg-alt: #f6f7f9;
  --border: #e4e7ea;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: var(--bg-alt);
  color: var(--ink);
  font-family: "Noto Sans JP", system-ui, sans-serif;
  line-height: 1.8;
}
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 14px 20px;
}
.site-header img {
  height: 30px;
  width: auto;
  display: block;
}
main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 64px;
}
h1 {
  font-size: clamp(22px, 4.6vw, 28px);
  font-weight: 900;
  color: var(--navy);
  text-align: center;
  margin: 0 0 12px;
}
.lead {
  text-align: center;
  color: #555;
  font-size: 15px;
  margin: 0 0 28px;
}
.form-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 28px 22px;
}
.card-text {
  margin: 0 0 20px;
  font-size: 15px;
  color: var(--navy);
}
.card-text:last-child {
  margin-bottom: 0;
}
.site-footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  text-align: center;
  padding: 24px 20px;
  font-size: 12px;
  color: #8a9096;
}
.site-footer a {
  color: #565b61;
  text-decoration: none;
  margin: 0 10px;
}