:root {
  --bg: #0f1216; --card: #181c22; --line: #2a3039; --text: #e6e9ee; --dim: #9aa3af;
  --accent: #c026d3; --ok: #22c55e; --bad: #ef4444;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
body { margin: 0; background: var(--bg); color: var(--text); font: 14px/1.45 system-ui, sans-serif; }
header {
  display: flex; align-items: center; gap: 16px; padding: 10px 18px;
  border-top: 4px solid var(--accent); border-bottom: 1px solid var(--line);
}
h1 { font-size: 16px; margin: 0; flex: 1; }
h2 { font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--dim); margin: 0 0 10px; }
main { max-width: 760px; margin: 18px auto; padding: 0 14px; display: grid; gap: 14px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 14px 16px; }
dl { display: grid; grid-template-columns: 110px 1fr; gap: 4px 12px; margin: 0 0 10px; }
dt { color: var(--dim); }
dd { margin: 0; }
.field { display: grid; grid-template-columns: 150px 1fr; align-items: center; gap: 12px; margin: 6px 0; }
.field span { color: var(--dim); }
.start { display: flex; gap: 8px; }
select, input, button, .button {
  font: inherit; color: var(--text); background: #11151a; border: 1px solid var(--line);
  border-radius: 6px; padding: 5px 9px;
}
input[type=number] { width: 110px; }
button, .button { cursor: pointer; text-decoration: none; display: inline-block; }
button:disabled { opacity: .45; cursor: default; }
button.primary, .button { background: var(--accent); border-color: var(--accent); color: #fff; }
button.danger { border-color: var(--bad); color: #fecaca; }
.buttons { display: flex; gap: 8px; margin-top: 10px; }
.error { color: #fecaca; background: #3b1212; border: 1px solid var(--bad); border-radius: 6px; padding: 6px 9px; }
.note { color: var(--dim); }
pre { margin: 0; max-height: 320px; overflow: auto; font-size: 12px; color: var(--dim); white-space: pre-wrap; }