:root {
  --bg: #f3f5f9; --card: #ffffff; --text: #0f172a; --muted: #64748b; --line: #e2e8f0;
  --accent: #2563eb; --accent-text: #ffffff; --ok: #059669; --bad: #dc2626; --bar: #0f172a; --bar-text: #e2e8f0;
  --radius: 12px;
}
@media (prefers-color-scheme: dark) {
  :root { --bg: #0b1220; --card: #111a2e; --text: #e2e8f0; --muted: #94a3b8; --line: #1f2a44; --bar: #050a14; --accent: #3b82f6; }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.45 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Inter, sans-serif; }
a { color: var(--accent); }
a.btn { text-decoration: none; display: inline-block; }
header.top { position: sticky; top: 0; z-index: 5; background: var(--bar); color: var(--bar-text); display: flex; align-items: center; gap: 12px;
  padding: 10px 16px; flex-wrap: wrap; }
header.top .brand { font-weight: 700; font-size: 17px; color: #fff; margin-right: 8px; }
header.top nav { display: flex; gap: 4px; flex-wrap: wrap; flex: 1; }
header.top nav button { background: none; border: 0; color: var(--bar-text); padding: 6px 10px; border-radius: 8px; font: inherit; cursor: pointer; }
header.top nav button.on { background: #fff; color: #0f172a; font-weight: 600; }
header.top .badge { background: var(--bad); color: #fff; border-radius: 10px; padding: 0 6px; font-size: 12px; margin-left: 4px; }
main { max-width: 1100px; margin: 0 auto; padding: 18px 16px 60px; }
h1 { font-size: 22px; margin: 4px 0 14px; }
h2 { font-size: 16px; margin: 0 0 10px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 14px; }
.grid3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 10px; }
label.f { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; font-size: 13px; color: var(--muted); }
input, select, textarea { font: inherit; color: var(--text); background: var(--card); border: 1px solid var(--line); border-radius: 8px; padding: 9px 10px; width: 100%; }
textarea { min-height: 90px; resize: vertical; }
input[type=checkbox], input[type=radio] { width: auto; }
.btn { font: inherit; border: 1px solid var(--line); background: var(--card); color: var(--text); padding: 8px 14px; border-radius: 9px; cursor: pointer; white-space: nowrap; }
.btn.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
.btn.danger { color: var(--bad); }
.btn.sm { padding: 4px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: default; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 8px 6px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; color: var(--muted); font-weight: 600; }
.pill { display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: 12px; background: var(--line); }
.pill.ok { background: #d1fae5; color: #065f46; } .pill.bad { background: #fee2e2; color: #991b1b; }
.err { color: var(--bad); min-height: 18px; font-size: 13px; }
.toast { position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%); background: #0f172a; color: #fff; padding: 10px 16px; border-radius: 10px; z-index: 50; max-width: 90vw; }
.toast.bad { background: var(--bad); }
.auth { max-width: 420px; margin: 40px auto; }
.hero { text-align: center; padding: 30px 10px 10px; }
.hero h1 { font-size: 28px; margin-bottom: 8px; }
.hero p { color: var(--muted); max-width: 620px; margin: 0 auto 18px; }
.log { max-height: 320px; overflow: auto; font-size: 14px; }
.log div { margin: 4px 0; }
.stat { font-size: 26px; font-weight: 700; }
code.key { display: block; padding: 10px; background: var(--bg); border: 1px dashed var(--line); border-radius: 8px; word-break: break-all; font-size: 14px; }
@media (max-width: 640px) {
  table.stack thead { display: none; }
  table.stack tr { display: block; border-bottom: 1px solid var(--line); padding: 6px 0; }
  table.stack td { display: block; border: 0; padding: 2px 0; }
}