:root {
  color-scheme: light;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 24px 16px;
  background: #f3f5f8;
  color: #152037;
}
main {
  width: 100%;
  max-width: 390px;
  background: #fff;
  border: 1px solid #e6eaf0;
  border-radius: 16px;
  padding: 32px 28px;
  box-shadow: 0 18px 50px rgba(13, 23, 40, 0.08);
}
.brand { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; }
.mark {
  width: 40px; height: 40px; border-radius: 10px;
  display: grid; place-items: center;
  background: #f7ca46; color: #0d1728; font-weight: 800; font-size: 22px;
}
.brand div strong { display: block; font-size: 16px; letter-spacing: 0.12em; }
.brand div span { font-size: 11px; letter-spacing: 0.3em; color: #66758a; }
h1 { font-size: 22px; margin: 0 0 6px; }
p, ol { margin: 0 0 16px; color: #4a5568; font-size: 14px; line-height: 1.5; }
ol { padding-left: 18px; }
label { display: block; font-size: 13px; font-weight: 600; margin: 14px 0 6px; }
input {
  width: 100%; padding: 11px 12px; font: inherit; font-size: 16px;
  border: 1px solid #d5dce5; border-radius: 8px; color: #152037;
}
button {
  width: 100%; margin-top: 20px; padding: 12px; border: 0; border-radius: 8px;
  background: #0d1728; color: #fff; font: inherit; font-size: 15px; font-weight: 600;
  cursor: pointer;
}
button:hover { background: #22314a; }
input:focus-visible, button:focus-visible, a:focus-visible {
  outline: 3px solid #e6ad11; outline-offset: 2px;
}
.error {
  background: #fdf0ef; border: 1px solid #f3d4d0; color: #9b2c20;
  border-radius: 8px; padding: 10px 12px; font-size: 13px;
}
.qr {
  width: 208px; margin: 6px auto 12px; padding: 12px;
  background: #fff; border: 1px solid #e6eaf0; border-radius: 12px;
}
.qr svg { display: block; width: 100%; height: auto; }
.secret {
  text-align: center; padding: 10px 12px; border-radius: 8px; background: #f3f5f8;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px;
  letter-spacing: 0.06em; color: #152037; overflow-wrap: anywhere;
}
small { display: block; margin-top: 16px; font-size: 13px; }
a { color: #0d1728; }