* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, Arial, sans-serif;
  background: #0f172a;
  color: #e2e8f0;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  padding: 16px;
}
.phone { width: 100%; max-width: 480px; }
h1 { margin: 0 0 16px; }
.card {
  background: #1e293b;
  border-radius: 12px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 4px 16px rgba(0,0,0,.3);
}
.card h3 { margin: 0 0 12px; color: #38bdf8; }
input {
  width: 100%;
  padding: 10px;
  margin-bottom: 10px;
  border-radius: 8px;
  border: 1px solid #334155;
  background: #0f172a;
  color: #e2e8f0;
  font-size: 14px;
}
button {
  padding: 10px 16px;
  margin-right: 8px;
  border: none;
  border-radius: 8px;
  background: #2563eb;
  color: #fff;
  cursor: pointer;
  font-weight: 600;
}
button:disabled { background: #475569; cursor: not-allowed; }
button:hover:enabled { background: #1d4ed8; }
.status {
  margin-top: 8px;
  font-size: 13px;
  color: #94a3b8;
}
pre#log {
  background: #020617;
  padding: 12px;
  border-radius: 8px;
  max-height: 240px;
  overflow: auto;
  font-size: 11px;
  color: #64748b;
}