:root {
  --bg: #f7f4ef;
  --card: #ffffff;
  --ink: #1f2a2e;
  --muted: #5f6b70;
  --line: #e2ddd4;
  --accent: #2f6b5a;
  --accent-ink: #ffffff;
  --soft: #e8f0ec;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 480px; margin: 0 auto; padding: 32px 16px 48px; }
.brand { font-size: 13px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent); font-weight: 600; }
h1 { font-size: 28px; line-height: 1.2; margin: 8px 0 8px; }
p.lead { color: var(--muted); margin: 0 0 24px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px; }
label { display: block; font-weight: 600; font-size: 14px; margin: 16px 0 6px; }
label:first-child { margin-top: 0; }
.hint { font-weight: 400; color: var(--muted); font-size: 13px; }
input, textarea {
  width: 100%; padding: 12px; font: inherit; color: inherit;
  border: 1px solid var(--line); border-radius: 10px; background: #fff;
}
input:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 1px; border-color: transparent; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.check { display: flex; gap: 10px; align-items: flex-start; font-weight: 400; font-size: 14px; color: var(--muted); }
.check input { width: auto; margin-top: 3px; }
button {
  width: 100%; margin-top: 20px; padding: 14px; font: inherit; font-weight: 600;
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px; cursor: pointer;
}
button[disabled] { opacity: .6; cursor: wait; }
.error { color: #a33; font-size: 14px; margin-top: 12px; }
.success { text-align: center; }
.code {
  font: 700 30px/1 ui-monospace, Menlo, monospace; letter-spacing: .08em;
  background: var(--soft); color: var(--accent); border-radius: 12px; padding: 18px; margin: 16px 0;
  user-select: all;
}
.fine { font-size: 12px; color: var(--muted); margin-top: 20px; }
a { color: var(--accent); }
.hidden { display: none; }