:root {
  --bg: #0c0d10;
  --fg: #dfe1e8;
  --muted: #7d8091;
  --line: #23252e;
  --accent: #c792ea;
  --bad: #ff6b6b;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.6 ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
header {
  display: flex; align-items: baseline; gap: 12px;
  padding: 18px 24px; border-bottom: 1px solid var(--line);
}
.brand { color: var(--accent); font-weight: 600; }
.tag, .muted { color: var(--muted); font-size: 13px; }
main { max-width: 780px; margin: 0 auto; padding: 32px 24px 64px; }
h1 { font-size: 20px; margin: 0 0 8px; }
h2 { font-size: 13px; margin: 28px 0 8px; color: var(--muted);
     text-transform: uppercase; letter-spacing: .08em; }
label { display: block; margin: 16px 0 6px; font-size: 13px; color: var(--muted); }
textarea {
  width: 100%; padding: 12px; background: #111319; color: var(--fg);
  border: 1px solid var(--line); border-radius: 6px; font: inherit; resize: vertical;
}
button {
  margin-top: 14px; padding: 10px 18px; background: var(--accent); color: #1a1020;
  border: 0; border-radius: 6px; font: inherit; font-weight: 600; cursor: pointer;
}
pre {
  background: #111319; border: 1px solid var(--line); border-radius: 8px;
  padding: 14px; overflow: auto; white-space: pre-wrap; word-break: break-word;
}
pre.error { color: var(--bad); }
code { color: var(--accent); }