:root {
  color-scheme: dark;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --blue: #2563eb;
  --blue-press: #1d4ed8;
}
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  min-height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  font-family: "Segoe UI", system-ui, sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(37, 99, 235, 0.35), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(14, 165, 233, 0.22), transparent 50%),
    #0f172a;
}
.gate {
  width: min(440px, 100%);
  background: #fff;
  border-radius: 12px;
  padding: 28px 24px 22px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}
.kicker {
  margin: 0 0 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: #2563eb;
}
h1 {
  margin: 0 0 8px;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.lead {
  margin: 0 0 22px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}
.actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}
.btn:hover { background: #f8fafc; }
.btn-primary {
  border-color: var(--blue);
  background: var(--blue);
  color: #fff;
}
.btn-primary:hover { background: var(--blue-press); }
.status {
  margin: 0;
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}
.status.err { color: #b91c1c; }
.status a { color: var(--blue); font-weight: 700; }