:root {
  --bg: #f8f9ff;
  --card: #ffffff;
  --primary: #667eea;
  --primary-hover: #5a67d8;
  --secondary: #48bb78;
  --text: #2d3748;
  --muted: #718096;
  --border: #e2e8f0;
  --code-bg: #f7fafc;
  --warn: #dd6b20;
  --err: #e53e3e;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  padding: 24px 16px;
}

.container { max-width: 760px; margin: 0 auto; }

header { text-align: center; margin-bottom: 28px; }
h1 { font-size: 1.75rem; color: var(--text); margin-bottom: 6px; }
.subtitle { color: var(--muted); font-size: 0.95rem; }
.badge {
  display: inline-block; margin-top: 10px;
  background: #ebf4ff; color: var(--primary);
  padding: 3px 12px; border-radius: 12px; font-size: 0.8rem;
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 18px;
}

label { display: block; font-weight: 600; margin-bottom: 8px; color: var(--text); }

textarea, input[type="text"] {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  font-family: ui-monospace, "SF Mono", Consolas, monospace;
  resize: vertical;
  background: #fff;
}

.btn-row { display: flex; gap: 10px; align-items: center; margin-top: 12px; flex-wrap: wrap; }

.btn {
  background: var(--primary); color: #fff; border: none;
  padding: 10px 20px; border-radius: 8px; cursor: pointer; font-size: 14px;
  transition: background .15s;
}
.btn:hover { background: var(--primary-hover); }
.btn.secondary { background: var(--secondary); }
.btn.secondary:hover { background: #38a169; }
.btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--border); }

.status { font-size: 13px; color: var(--muted); margin-left: auto; }
.status.err { color: var(--err); }

footer { margin-top: 24px; text-align: center; font-size: 13px; color: var(--muted); }
.disclaimer {
  background: #fffbeb; border: 1px solid #f6e0a3; border-radius: 8px;
  padding: 12px 16px; margin-bottom: 14px; font-size: 13px; color: #92600a; text-align: left;
}
footer a { color: var(--primary); text-decoration: none; }