:root { --acc: #0f6e6a; --text: #14201f; --line: #e4e9e8; --err: #a2271f;
  font-family: -apple-system, "Segoe UI", Roboto, sans-serif; font-size: 16px; color: var(--text); }
* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #f6f8f8; padding: 16px; }
.box { width: 100%; max-width: 360px; background: #fff; border-radius: 24px; padding: 32px 24px;
  box-shadow: 0 8px 24px rgba(20, 40, 38, 0.1); }
h1 { margin: 0 0 24px; font-size: 24px; color: var(--acc); display: flex; align-items: center; gap: 12px; }
label { display: block; margin-bottom: 16px; font-size: 14px; }
input { display: block; width: 100%; margin-top: 4px; min-height: 48px; padding: 0 12px; font: inherit;
  border: 1px solid var(--line); border-radius: 12px; }
button { width: 100%; min-height: 48px; border: 0; border-radius: 12px; background: var(--acc); color: #fff;
  font: inherit; font-weight: 700; cursor: pointer; }
.error { color: var(--err); min-height: 1.4em; margin: 0 0 8px; font-size: 14px; }
.small { font-size: 12px; color: rgba(20, 32, 31, 0.6); word-break: break-all; }
#qr { display: block; margin: 16px auto; }