:root {
  --ink: #15171a;
  --muted: #5b6168;
  --bg: #f7f6f2;
  --card: #ffffff;
  --line: #e2dfd8;
  --accent: #1f5fd6;
  --accent-ink: #ffffff;
  --note: #eef3fb;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
a { color: var(--accent); }
.wrap { max-width: 720px; margin: 0 auto; padding: 0 16px; }
header.site { border-bottom: 1px solid var(--line); background: var(--card); }
header.site .wrap { display: flex; align-items: center; justify-content: space-between; min-height: 60px; gap: 12px; flex-wrap: wrap; }
.brand { font-weight: 800; font-size: 20px; letter-spacing: -0.02em; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); }
nav a { margin-left: 14px; font-size: 15px; color: var(--muted); text-decoration: none; }
nav a:first-child { margin-left: 0; }
main { padding: 32px 0 48px; }
h1 { font-size: 32px; line-height: 1.2; letter-spacing: -0.02em; margin: 0 0 12px; }
h2 { font-size: 22px; margin: 32px 0 8px; }
h3 { font-size: 18px; margin: 24px 0 6px; }
.lead { font-size: 19px; color: var(--muted); margin: 0 0 20px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; margin: 20px 0; }
.disclosure { background: var(--note); border: 1px solid #cddcf5; border-radius: 12px; padding: 16px; font-size: 15px; }
.btn {
  display: block; text-align: center; background: var(--accent); color: var(--accent-ink);
  font-weight: 700; font-size: 19px; padding: 16px 20px; border-radius: 12px; text-decoration: none; margin: 18px 0 8px;
}
.qr { display: block; width: 220px; height: 220px; margin: 8px auto; image-rendering: pixelated; }
.center { text-align: center; }
.small { font-size: 14px; color: var(--muted); }
.msg { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: 14px; background: #f1f0ec; border: 1px solid var(--line); border-radius: 10px; padding: 12px; white-space: pre-wrap; }
ol.steps { padding-left: 22px; }
ol.steps li { margin: 10px 0; }
img.shot { display: block; max-width: 100%; height: auto; border: 1px solid var(--line); border-radius: 12px; margin: 12px 0; background: var(--card); }
footer.site { border-top: 1px solid var(--line); padding: 20px 0 32px; font-size: 14px; color: var(--muted); }
footer.site a { color: var(--muted); margin-right: 14px; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
td, th { text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); padding: 8px 6px; }
@media (max-width: 480px) { h1 { font-size: 27px; } nav a { margin-left: 10px; } }