:root {
  --bg: #f4f2ec;
  --panel: #ffffff;
  --ink: #1d1f1c;
  --muted: #62665e;
  --line: #d9d6cc;
  --accent: #2f6b3f;
  --accent-ink: #ffffff;
  --warn-bg: #fff4d6;
  --warn-ink: #6b4e00;
  --err-bg: #fde4e1;
  --err-ink: #8a1f12;
  --mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #121512;
    --panel: #1b1f1b;
    --ink: #e7e9e3;
    --muted: #9aa094;
    --line: #2e342e;
    --accent: #6fbf7e;
    --accent-ink: #0d140e;
    --warn-bg: #3a3016;
    --warn-ink: #f2d98a;
    --err-bg: #3d1c18;
    --err-ink: #f4b2a8;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.55 system-ui, "Segoe UI", sans-serif;
}
main { max-width: 640px; margin: 0 auto; padding: 48px 16px 64px; }

.brand { font-family: var(--mono); font-size: 13px; letter-spacing: .12em; color: var(--muted); text-transform: uppercase; margin: 0 0 8px; }
h1 { font-size: 30px; line-height: 1.2; margin: 0 0 12px; }
h2 { font-size: 18px; margin: 0 0 10px; }
p { margin: 0 0 12px; }
.lead { color: var(--muted); margin-bottom: 28px; }

.step { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 20px; margin-bottom: 16px; }
.step-num { font-family: var(--mono); color: var(--accent); font-size: 13px; margin-bottom: 4px; }

label { display: block; font-weight: 600; margin-bottom: 6px; }
input[type=text] {
  width: 100%; padding: 10px 12px; font: inherit; color: var(--ink);
  background: var(--bg); border: 1px solid var(--line); border-radius: 6px;
}
input[type=text]:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.hint { color: var(--muted); font-size: 14px; margin-top: 6px; }

button, .button {
  display: inline-block; margin-top: 14px; padding: 10px 18px; font: inherit; font-weight: 600;
  color: var(--accent-ink); background: var(--accent); border: 0; border-radius: 6px; cursor: pointer; text-decoration: none;
}
button.secondary { background: transparent; color: var(--accent); border: 1px solid var(--accent); margin-left: 8px; }
button:disabled { opacity: .5; cursor: wait; }

.msg { border-radius: 6px; padding: 12px 14px; margin-bottom: 16px; }
.msg.warn { background: var(--warn-bg); color: var(--warn-ink); }
.msg.err { background: var(--err-bg); color: var(--err-ink); }

pre { font-family: var(--mono); font-size: 13px; background: var(--bg); border: 1px solid var(--line); border-radius: 6px; padding: 12px; overflow-x: auto; margin: 12px 0 0; }
.qr { margin-top: 16px; background: #fff; padding: 12px; border-radius: 6px; display: inline-block; }
.qr svg { display: block; width: 220px; height: 220px; }
details { margin-top: 14px; }
summary { cursor: pointer; color: var(--muted); }
ol { padding-left: 20px; margin: 0; }
li { margin-bottom: 6px; }
a { color: var(--accent); }
[hidden] { display: none !important; }