:root {
  --bg: #0b1220;
  --card: #121a2b;
  --text: #e8eefc;
  --muted: #9aa8c7;
  --accent: #0b5fff;
  --accent2: #22c55e;
  --warn: #fbbf24;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Noto Sans SC", sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, #1a2b55, var(--bg));
  color: var(--text);
  line-height: 1.55;
}
.wrap { max-width: 920px; margin: 0 auto; padding: 48px 20px 64px; }
.badge {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  background: rgba(11,95,255,.15); color: #9ec1ff; font-size: 12px; letter-spacing: .02em;
}
h1 { font-size: 2rem; margin: 12px 0 8px; }
.sub, .ver, .hint, footer, .notes, .step-detail { color: var(--muted); }
.cards { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); margin: 28px 0; }
.card { background: var(--card); border: 1px solid rgba(255,255,255,.06); border-radius: 16px; padding: 20px; }
.btn {
  display: inline-block; margin-top: 12px; padding: 14px 20px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), #0047d1); color: #fff; text-decoration: none; font-weight: 600;
}
.btn-primary { box-shadow: 0 8px 24px rgba(11,95,255,.35); }
.btn:hover { filter: brightness(1.08); }
.path-label { margin: 16px 0 6px; font-size: 13px; color: var(--muted); }
.path-box {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(0,0,0,.35);
  border: 1px dashed rgba(158,193,255,.35);
  word-break: break-all;
}
.placeholder {
  margin-top: 12px;
  padding: 14px 14px 10px;
  border-radius: 12px;
  border: 1px solid rgba(251,191,36,.35);
  background: rgba(251,191,36,.08);
}
.placeholder-title {
  margin: 0 0 8px;
  color: var(--warn);
  font-weight: 700;
}
.ok-note {
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(34,197,94,.12);
  border: 1px solid rgba(34,197,94,.35);
  color: #bbf7d0;
}
.notes { padding-left: 1.2rem; margin: 16px 0 0; font-size: 0.92rem; }
.steps { padding-left: 1.2rem; margin: 12px 0; }
.steps li { margin-bottom: 12px; }
.step-detail { display: block; margin-top: 4px; font-size: 0.92rem; }
.changelog { background: rgba(255,255,255,.03); border-radius: 12px; padding: 16px 20px; }
ol { padding-left: 1.2rem; }
code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: rgba(255,255,255,.06);
  padding: 1px 6px;
  border-radius: 6px;
}
.btn[hidden], [hidden] { display: none !important; }