:root {
  --bg0: #0f1419;
  --bg1: #1a2332;
  --gold: #c4a35a;
  --text: #e8e4d9;
  --muted: #9aa3b2;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(ellipse at 20% 0%, #243049 0%, transparent 50%),
    radial-gradient(ellipse at 80% 100%, #1c2838 0%, transparent 45%),
    var(--bg0);
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 80px;
}

.brand {
  letter-spacing: 0.35em;
  color: var(--gold);
  font-size: 12px;
  text-transform: uppercase;
  margin: 0 0 8px;
}

h1 {
  margin: 0;
  font-weight: 600;
  font-size: clamp(28px, 5vw, 40px);
}

.sub {
  color: var(--muted);
  margin: 10px 0 28px;
  line-height: 1.5;
}

.form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-bottom: 28px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

label.full { grid-column: 1 / -1; }

input, textarea, button {
  font: inherit;
  border-radius: 8px;
  border: 1px solid rgba(196, 163, 90, 0.35);
  background: rgba(26, 35, 50, 0.85);
  color: var(--text);
  padding: 10px 12px;
}

button {
  grid-column: 1 / -1;
  cursor: pointer;
  background: linear-gradient(135deg, #8b7355, #c4a35a);
  color: #1a1408;
  border: none;
  font-weight: 600;
  letter-spacing: 0.08em;
}

button:disabled { opacity: 0.6; cursor: wait; }

.out h2 {
  font-size: 14px;
  color: var(--gold);
  letter-spacing: 0.12em;
  font-weight: 500;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(0, 0, 0, 0.35);
  border: 1px solid rgba(196, 163, 90, 0.2);
  border-radius: 10px;
  padding: 16px;
  font-size: 12px;
  line-height: 1.55;
  min-height: 120px;
}

.hint { color: var(--muted); font-size: 13px; }

@media (max-width: 560px) {
  .form { grid-template-columns: 1fr; }
}