:root {
  --bg: #f4f5f7; --card: #fff; --text: #16181d; --muted: #667085; --line: #e3e6ea;
  --accent: #1f6feb; --accent-text: #fff; --ok: #12a150; --warn: #c27c0e; --err: #d1242f;
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0f1115; --card: #1a1d23; --text: #e8eaed; --muted: #9aa1ac; --line: #2c313a; --accent: #4c8dff; }
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body { font: 16px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }
body.center { display: flex; align-items: center; justify-content: center; padding: 16px; min-height: 100%; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 24px; width: 100%; max-width: 420px; display: flex; flex-direction: column; gap: 14px; }
h1 { margin: 0; font-size: 1.6rem; }
.muted { color: var(--muted); margin: 0; font-size: .92rem; }
label { font-weight: 600; font-size: .9rem; }
input { font: inherit; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: var(--bg); color: var(--text); width: 100%; }
.btn { font: inherit; font-weight: 600; text-align: center; text-decoration: none; padding: 14px; border-radius: 12px; border: 0; background: var(--accent); color: var(--accent-text); cursor: pointer; }
.btn.secondary { background: transparent; color: var(--accent); border: 1px solid var(--line); }
.btn.stop { background: var(--err); }
.btn:disabled { opacity: .5; cursor: default; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.stat { background: var(--bg); border-radius: 10px; padding: 10px 12px; }
.stat b { display: block; font-size: 1.1rem; font-variant-numeric: tabular-nums; }
.stat span { font-size: .78rem; color: var(--muted); }
.pill { display: inline-flex; align-items: center; gap: 6px; font-size: .85rem; font-weight: 600; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--muted); flex: none; }
.dot.ok { background: var(--ok); box-shadow: 0 0 0 4px color-mix(in srgb, var(--ok) 25%, transparent); }
.dot.warn { background: var(--warn); }
.dot.err { background: var(--err); }
.notice { font-size: .85rem; padding: 10px 12px; border-radius: 10px; background: color-mix(in srgb, var(--warn) 14%, transparent); }
.hidden { display: none !important; }