:root{--bg:#F2F2F7;--card:#FFFFFF;--ink:#111827;--muted:#5B6370;--line:#E5E7EB;--accent:#0C2340;--on-accent:#FFFFFF;--soft:#E7EBF2;--warn:#92400E}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#000000;--card:#1C1C1E;--ink:#F5F5F7;--muted:#A1A1AA;--line:#2C2C2E;--accent:#8FB3FF;--on-accent:#0B1530;--soft:#2C2C2E;--warn:#FBBF24}}
:root[data-theme="dark"]{--bg:#000000;--card:#1C1C1E;--ink:#F5F5F7;--muted:#A1A1AA;--line:#2C2C2E;--accent:#8FB3FF;--on-accent:#0B1530;--soft:#2C2C2E;--warn:#FBBF24}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.45 -apple-system,BlinkMacSystemFont,"SF Pro Text","Inter","Roboto",system-ui,sans-serif;-webkit-text-size-adjust:100%}
main{max-width:440px;margin:0 auto;padding:24px 16px 40px;display:flex;flex-direction:column;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;letter-spacing:-.01em}
.brand svg{width:30px;height:30px}
h1{margin:4px 0 0;font-size:30px;line-height:1.15;letter-spacing:-.02em;font-weight:800}
.sub{margin:0;color:var(--muted)}
.card{background:var(--card);border-radius:20px;padding:20px;display:flex;flex-direction:column;align-items:center;gap:10px;border:1px solid var(--line)}
.qr{background:#fff;padding:12px;border-radius:12px;line-height:0}
.qr img,.qr canvas{width:220px!important;height:220px!important}
.num{font-size:18px;font-weight:700;letter-spacing:.04em;font-variant-numeric:tabular-nums}
.meta{color:var(--muted);font-size:14px;text-align:center}
.btn{display:flex;align-items:center;justify-content:center;gap:8px;min-height:52px;border-radius:16px;border:0;font:inherit;font-weight:700;text-decoration:none;cursor:pointer;width:100%}
.primary{background:var(--accent);color:var(--on-accent)}
.tonal{background:var(--soft);color:var(--accent)}
.btn:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.steps{background:var(--card);border-radius:20px;padding:16px 18px;border:1px solid var(--line)}
.steps h2{margin:0 0 6px;font-size:15px;text-transform:uppercase;letter-spacing:.04em;color:var(--muted)}
.steps ol{margin:0;padding-left:20px;display:flex;flex-direction:column;gap:6px}
.note{font-size:13px;color:var(--muted);margin:0}
.warn{color:var(--warn);font-size:14px;margin:0}
.hidden{display:none!important}
.stack{display:flex;flex-direction:column;gap:16px}