:root {
  color-scheme: light dark;
  --background: #ffffff;
  --text: #1a1a1a;
  --strong: #0d0d0d;
  --muted: #6b6b6b;
  --border: rgb(0 0 0 / 0.12);
  --fill: rgb(0 0 0 / 0.045);
  --hover: rgb(0 0 0 / 0.035);
  --accent: #0d0d0d;
  --on-accent: #ffffff;
  --danger: #c10007;
  --ok-dot: #00bc7d;
  --danger-dot: #fb2c36;
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Inter', system-ui, sans-serif;
  font-size: 14px;
  line-height: 1.45;
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: #181818;
    --text: #ececec;
    --strong: #ffffff;
    --muted: #a1a1a1;
    --border: rgb(255 255 255 / 0.14);
    --fill: rgb(255 255 255 / 0.065);
    --hover: rgb(255 255 255 / 0.05);
    --accent: #ffffff;
    --on-accent: #181818;
    --danger: #ff6467;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--background); color: var(--text); }
main { max-width: 360px; margin: 14vh auto 48px; padding: 0 24px; }
.icon { display: block; width: 48px; height: 48px; margin-bottom: 28px; }
h1 { margin: 0; font-size: 24px; font-weight: 600; letter-spacing: -0.01em; color: var(--strong); }
.message { margin: 8px 0 0; color: var(--muted); }
form { margin: 20px 0 0; }
label { display: block; margin: 16px 0 6px; font-size: 13px; font-weight: 500; }
input { width: 100%; height: 36px; padding: 0 12px; border: 1px solid var(--border); border-radius: 8px; background: transparent; color: var(--text); font: inherit; }
input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent); }
.hint { margin: 6px 0 0; font-size: 12px; color: var(--muted); }
.error { margin: 12px 0 0; font-size: 13px; color: var(--danger); }
.error:empty { display: none; }
button { height: 36px; padding: 0 16px; border-radius: 8px; font: inherit; font-weight: 500; cursor: pointer; }
button:disabled { opacity: 0.5; cursor: default; }
button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.ink { width: 100%; margin-top: 24px; border: none; background: var(--accent); color: var(--on-accent); }
.muted { border: 1px solid var(--border); background: transparent; color: var(--text); }
.muted:hover { background: var(--hover); }
.text { height: auto; padding: 0; border: none; background: none; color: var(--muted); font-weight: 400; }
.text:hover { color: var(--text); text-decoration: underline; }
.buttons { display: flex; gap: 12px; margin-top: 24px; }
.buttons button { flex: 1; margin: 0; }
.code { margin: 20px 0 0; padding: 16px; border: 1px solid var(--border); border-radius: 12px; text-align: center; font: 600 28px/1.2 ui-monospace, 'SF Mono', 'JetBrains Mono', monospace; letter-spacing: 0.12em; color: var(--strong); }
.group { margin: 20px 0 0; padding: 12px 16px; border: 1px solid var(--border); border-radius: 12px; }
.group p { margin: 0; }
.name { font-weight: 500; color: var(--strong); }
.email { color: var(--muted); }
.footer { margin: 24px 0 0; font-size: 13px; color: var(--muted); }
.footer a { color: var(--text); }
.dot { display: block; width: 8px; height: 8px; margin-bottom: 12px; border-radius: 50%; }
.dot.ok { background: var(--ok-dot); }
.dot.danger { background: var(--danger-dot); }