:root {
  --canvas: #ffffff;
  --surface: #f7f7f7;
  --ink: #222222;
  --body: #3f3f3f;
  --muted: #6a6a6a;
  --hairline: #dddddd;
  --lamp: #ffb000;
  --lamp-halo: rgba(255, 176, 0, 0.22);
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--canvas);
  color: var(--body);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}
main { max-width: 640px; margin: 0 auto; padding: 32px 16px 64px; }
header { display: flex; align-items: center; gap: 10px; margin-bottom: 40px; }
header a { color: var(--ink); font-weight: 700; font-size: 18px; text-decoration: none; }
.lamp {
  width: 12px; height: 12px; border-radius: 50%; margin-left: 6px;
  background: var(--lamp); box-shadow: 0 0 0 6px var(--lamp-halo);
}
h1 { color: var(--ink); font-size: 28px; line-height: 1.3; margin: 0 0 16px; word-break: auto-phrase; }
h2 { color: var(--ink); font-size: 18px; line-height: 1.4; margin: 40px 0 8px; }
p, li { margin: 0 0 12px; }
ul { padding-left: 1.2em; }
strong { color: var(--ink); }
a { color: var(--ink); }
code { font-size: 0.9em; background: var(--surface); padding: 1px 5px; border-radius: 6px; }
table { width: 100%; border-collapse: collapse; margin: 8px 0 16px; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 10px 8px; border-bottom: 1px solid var(--hairline); }
th { color: var(--ink); font-weight: 600; }
.box { background: var(--surface); border-radius: 14px; padding: 20px; margin: 24px 0; }
.code {
  display: block; width: 100%; font-family: ui-monospace, Menlo, monospace; font-size: 14px;
  word-break: break-all; background: var(--canvas); border: 1px solid var(--hairline);
  border-radius: 8px; padding: 12px; margin: 8px 0 12px; color: var(--ink);
}
button {
  font: inherit; font-weight: 600; color: #fff; background: var(--ink); border: 0;
  border-radius: 8px; padding: 12px 20px; cursor: pointer; min-height: 48px;
}
button:focus-visible, a:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }
.stores { display: flex; flex-wrap: wrap; gap: 12px; margin: 16px 0; }
.stores a {
  display: inline-block; padding: 12px 20px; border: 1px solid var(--ink);
  border-radius: 8px; text-decoration: none; font-weight: 600; min-height: 48px;
}
.muted { color: var(--muted); font-size: 14px; }
footer { margin-top: 64px; padding-top: 16px; border-top: 1px solid var(--hairline); font-size: 14px; color: var(--muted); }
footer a { color: var(--muted); margin-right: 16px; }