:root { color-scheme: dark; }
* { box-sizing: border-box; }
body {
  margin: 0; min-height: 100vh; display: grid; place-items: center;
  background: #0d1117; color: #e6edf3;
  font: 15px/1.5 -apple-system, "Segoe UI", Roboto, sans-serif;
}
.card {
  width: min(420px, 92vw); background: #161b22; border: 1px solid #30363d;
  border-radius: 12px; padding: 2rem; margin: 2rem 0;
}
.brand { font-weight: 700; font-size: 1.15rem; letter-spacing: .3px; margin-bottom: 1.2rem; }
.brand span { color: #58a6ff; margin-left: .35em; font-weight: 400; }
h1 { font-size: 1.25rem; margin: 0 0 .8rem; }
h2 { font-size: 1rem; margin: 1.4rem 0 .5rem; }
.muted { color: #8b949e; font-size: .9rem; }
.error { color: #f85149; font-size: .9rem; }
.ok { color: #3fb950; }
form { display: grid; gap: .9rem; margin-top: 1rem; }
label { display: grid; gap: .35rem; font-size: .85rem; color: #8b949e; }
input {
  background: #0d1117; border: 1px solid #30363d; border-radius: 6px;
  color: #e6edf3; padding: .55rem .7rem; font-size: 1rem;
}
input:focus { outline: 2px solid #1f6feb; border-color: #1f6feb; }
button, .button {
  display: block; text-align: center; text-decoration: none;
  background: #1f6feb; color: #fff; border: 0; border-radius: 6px;
  padding: .6rem; font-size: .95rem; cursor: pointer;
}
button:hover, .button:hover { background: #388bfd; }
.qr { display: block; margin: 1rem auto; width: 220px; background: #fff; padding: 10px; border-radius: 8px; }
.codes { columns: 2; padding-left: 1.2rem; }
.codes li { margin: .25rem 0; }
code { background: #0d1117; padding: .1em .35em; border-radius: 4px; font-size: .85em; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: .45rem .3rem; border-bottom: 1px solid #30363d; }
details { font-size: .85rem; color: #8b949e; margin-top: .5rem; }
a { color: #58a6ff; }
.card.wide { width: min(760px, 94vw); }
textarea {
  background: #0d1117; border: 1px solid #30363d; border-radius: 6px;
  color: #e6edf3; padding: .55rem .7rem; font: 12px/1.4 monospace;
}
select {
  background: #0d1117; border: 1px solid #30363d; border-radius: 6px;
  color: #e6edf3; padding: .55rem .7rem; font-size: 1rem;
}
.divider { display: flex; align-items: center; gap: .8rem; color: #8b949e; font-size: .85rem; margin: 1.2rem 0 .8rem; }
.divider::before, .divider::after { content: ""; flex: 1; border-top: 1px solid #30363d; }
button.secondary { background: #21262d; border: 1px solid #30363d; }
button.secondary:hover { background: #30363d; }