:root {
  --bg: #0f1115;
  --card: #171a21;
  --fg: #e6e8ec;
  --muted: #9aa3b0;
  --accent: #3da9fc;
  --warn: #f5a623;
  --ok: #4cd964;
  --border: #262b34;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.5;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 24px 16px 64px;
}

header h1 {
  font-size: 1.5rem;
  margin: 0 0 4px;
}

header .sub {
  margin: 0 0 8px;
  color: var(--muted);
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 18px 20px;
  margin: 18px 0;
}

.card h2 {
  margin-top: 0;
  font-size: 1.15rem;
}

ol { padding-left: 1.25rem; }
li { margin: 6px 0; }

code {
  background: #0b0d11;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 1px 6px;
  font-size: 0.85em;
  word-break: break-all;
}

pre.example {
  background: #0b0d11;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  overflow-x: auto;
  font-size: 0.78rem;
  white-space: pre-wrap;
  word-break: break-all;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #04121f;
  font-weight: 600;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 10px;
  font-size: 1rem;
}
.btn:active { transform: translateY(1px); }

.hint {
  color: var(--muted);
  font-size: 0.85rem;
}

#qr-area {
  display: flex;
  justify-content: center;
  padding: 12px 0;
}
#qr {
  background: #fff;
  padding: 10px;
  border-radius: 10px;
  display: inline-block;
  line-height: 0;
}
#qr svg { display: block; max-width: 100%; height: auto; }

.status { font-size: 0.9rem; text-align: center; }
.status.ok { color: var(--ok); }
.status.warn { color: var(--warn); }

details summary {
  cursor: pointer;
  color: var(--muted);
  font-size: 0.85rem;
}
.deeplink {
  display: block;
  margin-top: 8px;
  white-space: pre-wrap;
}