:root {
  --bg: #0b0f14;
  --card: #151b24;
  --text: #e8edf4;
  --muted: #8b9aaf;
  --accent: #4b9cff;
  --err: #ff7a7a;
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-t: env(safe-area-inset-top, 0px);
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(16px + var(--safe-t)) 16px calc(16px + var(--safe-b));
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: radial-gradient(1200px 600px at 50% -20%, #1a2840, var(--bg));
  color: var(--text);
  line-height: 1.55;
}
.card {
  width: min(100%, 26rem);
  background: var(--card);
  border-radius: 16px;
  padding: clamp(1.1rem, 4vw, 1.75rem);
  border: 1px solid rgba(255,255,255,.06);
  box-shadow: 0 20px 50px rgba(0,0,0,.35);
}
h1 { font-size: clamp(1.2rem, 4.5vw, 1.45rem); margin: 0 0 0.75rem; font-weight: 700; }
.err { color: var(--err); font-size: 0.9rem; margin: 0 0 1rem; padding: 0.65rem 0.75rem; background: rgba(255,100,100,.08); border-radius: 8px; }
.steps { margin: 0; padding-left: 1.2rem; color: var(--muted); font-size: 0.95rem; }
.steps li { margin-bottom: 0.65rem; }
.steps a { color: var(--accent); word-break: break-all; }
code { font-size: 0.88em; background: rgba(0,0,0,.25); padding: 0.15em 0.4em; border-radius: 4px; }
.hint { margin-top: 1.25rem; font-size: 0.82rem; color: var(--muted); word-break: break-all; }
.hint code { display: block; margin-top: 0.35rem; font-size: 0.8rem; }