:root {
  --bg: #0b0d12;
  --card: #141821;
  --fg: #e8ecf3;
  --muted: #9aa4b2;
  --accent: #5b8cff;
  --accent-2: #2a3242;
  --danger: #ff6b6b;
  --ok: #4caf83;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(1200px 600px at 50% -10%, #1a2030, var(--bg));
  color: var(--fg);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  padding: 16px;
}

.card {
  width: 100%;
  max-width: 460px;
  background: var(--card);
  border: 1px solid #1f2633;
  border-radius: 18px;
  padding: 28px 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
}

h1 { margin: 0 0 6px; font-size: 26px; }
h2 { margin: 0 0 12px; font-size: 17px; color: var(--fg); }

.lead { color: var(--muted); margin: 0 0 20px; }

.steps {
  margin: 0 0 22px;
  padding-left: 20px;
  color: var(--muted);
}
.steps li { margin-bottom: 8px; }

.btn {
  display: block;
  width: 100%;
  text-align: center;
  padding: 14px 16px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: opacity 0.15s, transform 0.05s;
}
.btn:active { transform: translateY(1px); }
.btn[disabled] { opacity: 0.5; cursor: default; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-secondary { background: var(--accent-2); color: var(--fg); border: 1px solid #2f3a4d; }
.btn-ghost { background: transparent; color: var(--muted); border: 1px solid #2f3a4d; margin-top: 14px; }

.step { margin-bottom: 22px; }
.step .btn { margin-bottom: 12px; }

.qr {
  display: flex;
  justify-content: center;
  margin: 8px 0;
}
.qr img {
  width: 200px;
  height: 200px;
  border-radius: 12px;
  background: #fff;
  padding: 8px;
}

.hint { color: var(--muted); font-size: 14px; min-height: 18px; margin: 10px 0 0; }
.muted { color: var(--muted); font-size: 13px; text-align: center; }
.note { color: var(--muted); font-size: 14px; margin: 10px 0; }
.note.warn { color: #ffcf8b; }

.error {
  margin-top: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  background: rgba(255, 107, 107, 0.12);
  color: var(--danger);
  font-size: 14px;
}

.fallback { margin-top: 18px; text-align: center; color: var(--muted); font-size: 14px; }
.fallback a, a { color: var(--accent); }