:root {
  --bg: #EEF1F8; --elevated: #FFFFFF; --text: #1a1a2e; --muted: #6B7285;
  --accent: #0f3460; --fill: rgba(15,52,96,0.08); --border: rgba(15,52,96,0.12); --deltaUp: #1E8563;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1a1a2e; --elevated: #16213e; --text: #eee; --muted: #9AA3B8;
    --accent: #5f8aff; --fill: rgba(255,255,255,0.08); --border: rgba(255,255,255,0.10); --deltaUp: #4ecca3;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif; }
a { color: var(--accent); }
.page { min-height: 100vh; display: flex; justify-content: center; padding: 32px 20px 24px; }
.col { width: 100%; max-width: 402px; display: flex; flex-direction: column; align-items: center; text-align: center; }
.brand { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; }
.brand img { border-radius: 10px; }
h1 { font-size: 34px; font-weight: 800; letter-spacing: -1.1px; margin: 28px 0 0; line-height: 1.1; }
.body { font-size: 16px; color: var(--muted); line-height: 1.4; margin: 10px 0 0; max-width: 320px; }
.store { display: inline-block; margin-top: 22px; }
.store img { height: 54px; display: block; }
.open { font-size: 16px; color: var(--muted); margin: 16px 0 0; }
.open a { font-weight: 700; text-decoration: none; }
.code-card { width: 100%; margin-top: 24px; background: var(--elevated); border: 1px solid var(--border);
  border-radius: 20px; padding: 16px 16px 16px 20px; display: flex; align-items: center; gap: 12px; text-align: left; }
.code-text { flex: 1; min-width: 0; }
.label { font-size: 13px; font-weight: 600; color: var(--muted); }
.code { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 26px; font-weight: 700; letter-spacing: 4px; margin-top: 2px; }
.hint { font-size: 13px; color: var(--muted); margin-top: 4px; }
.copy { border: 0; background: var(--fill); color: var(--accent); font: inherit; font-size: 15px; font-weight: 600;
  border-radius: 999px; padding: 10px 14px; cursor: pointer; white-space: nowrap; }
.copy { display: inline-flex; align-items: center; gap: 6px; }
.copy.copied { color: var(--deltaUp); }
.copy.copied .copy-glyph { display: none; }
.foot { margin-top: 28px; font-size: 13px; color: var(--muted); }
.qr-card { display: none; }
[hidden] { display: none !important; }
@media (min-width: 900px) {
  .page { align-items: center; gap: 96px; padding: 48px; }
  .col { align-items: flex-start; text-align: left; max-width: 520px; }
  h1 { font-size: 56px; margin-top: 36px; }
  .body { font-size: 19px; max-width: 460px; }
  .code-card { max-width: 420px; }
  .qr-card { display: flex; flex-direction: column; align-items: center; text-align: center; width: 300px;
    background: var(--elevated); border: 1px solid var(--border); border-radius: 24px; padding: 28px; }
  .qr { width: 200px; height: 200px; background: #fff; padding: 12px; border-radius: 12px; }
  .qr svg { width: 100%; height: 100%; display: block; }
  .qr-title { font-size: 17px; font-weight: 700; margin-top: 18px; }
  .qr-body { font-size: 14px; color: var(--muted); margin-top: 6px; line-height: 1.4; }
}