:root {
  color-scheme: dark;
  --bg: #0b0d12;
  --panel: #141824;
  --line: rgba(255,255,255,.08);
  --text: #e8eaf0;
  --muted: #9aa3b5;
  --cyan: #22d3ee;
  --purple: #a855f7;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font: 15px/1.5 ui-sans-serif, system-ui, sans-serif;
  background: radial-gradient(900px 400px at 20% -10%, rgba(168,85,247,.25), transparent 60%), var(--bg);
  color: var(--text);
}
main { max-width: 760px; margin: 0 auto; padding: 48px 20px 80px; }
a { color: var(--cyan); }
header { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 24px; }
h1 { font-size: 1.8rem; margin: 0; }
.sub, .hint { color: var(--muted); }
form, .result, article {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 16px;
}
label { display: block; font-size: 12px; color: var(--muted); margin: 12px 0 6px; }
textarea, select, input {
  width: 100%;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #0c0f16;
  color: var(--text);
  padding: 10px 12px;
  font: 13px/1.45 ui-monospace, SFMono-Regular, Menlo, monospace;
}
textarea { min-height: 220px; resize: vertical; }
button {
  margin-top: 14px;
  border: 0;
  border-radius: 10px;
  padding: 10px 14px;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  color: white;
  font-weight: 650;
  cursor: pointer;
}
.result { margin-top: 16px; }
pre { margin: 0; }
code.hljs, pre code { border-radius: 12px; }
.meta { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.meta span { font: 12px ui-monospace, monospace; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; }
.error { color: #fda4af; }