:root {
  --bg: #0f172a;
  --card: #1e293b;
  --text: #e2e8f0;
  --accent: #38bdf8;
  --error: #f87171;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.wrap {
  max-width: 480px;
  margin: 60px auto;
  padding: 0 16px;
}

h1 { text-align: center; }

.card {
  background: var(--card);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 20px;
}

form { display: flex; flex-direction: column; gap: 12px; }

label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; }

input {
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #334155;
  background: #0f172a;
  color: var(--text);
}

button {
  padding: 10px;
  border-radius: 8px;
  border: none;
  background: var(--accent);
  color: #0f172a;
  font-weight: 600;
  cursor: pointer;
  margin-top: 8px;
}

button:hover { opacity: 0.9; }

.error { color: var(--error); font-size: 14px; }

.hidden { display: none; }

pre {
  background: #0f172a;
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 13px;
}