:root {
  color-scheme: dark;
  --bg: #121016;
  --surface: #1b1720;
  --line: #2e2839;
  --text: #ece9f1;
  --dim: #a8a1b5;
  --accent: #6750a4;
  --accent-hover: #7a62bc;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px 20px;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
}

main {
  width: 100%;
  max-width: 30rem;
  text-align: center;
}

img.icon {
  width: 112px;
  height: 112px;
  border-radius: 26px;
  display: block;
  margin: 0 auto 22px;
}

h1 {
  margin: 0 0 14px;
  font-size: 1.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

p {
  margin: 0 0 14px;
  color: var(--dim);
  font-size: 0.95rem;
}

a.btn {
  display: inline-block;
  margin-top: 12px;
  padding: 13px 44px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
}

a.btn:hover { background: var(--accent-hover); }

dl {
  margin: 0 auto 6px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  text-align: left;
  font-size: 0.95rem;
}

dt {
  color: var(--dim);
  font-size: 0.85rem;
}

dd {
  margin: 0 0 12px;
  white-space: pre-wrap;
  word-break: break-word;
}

dd:last-child { margin-bottom: 0; }

.hint {
  margin-top: 20px;
  color: var(--dim);
  font-size: 0.83rem;
}

.failed {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--surface);
  color: var(--dim);
  font-size: 0.95rem;
}