:root {
  --bg: #f6f7f9; --panel: #ffffff; --text: #1a1d23; --muted: #667085; --line: #e4e7ec;
  --primary: #2563eb; --primary-text: #ffffff; --ok: #16a34a; --warn: #d97706; --bad: #dc2626; --info: #0891b2;
  --ok-bg: #dcfce7; --warn-bg: #fef3c7; --bad-bg: #fee2e2; --info-bg: #e0f2fe; --idle-bg: #eef0f3;
  --log-bg: #0f1420; --log-text: #d6deeb; --radius: 10px; --shadow: 0 1px 2px rgba(16, 24, 40, .06), 0 1px 3px rgba(16, 24, 40, .08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d1117; --panel: #161b22; --text: #e6edf3; --muted: #8b949e; --line: #30363d;
    --primary: #3b82f6; --ok-bg: #12301f; --warn-bg: #3a2a0c; --bad-bg: #3b1416; --info-bg: #0c2a36; --idle-bg: #21262d;
    --log-bg: #010409; --shadow: none;
  }
}
* { box-sizing: border-box; }
[hidden] { display: none !important; } /* author display rules (header { display:flex }) would otherwise beat the hidden attribute */
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--primary); text-decoration: none; }
h1 { font-size: 22px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 0 0 12px; }
code, .mono { font-family: ui-monospace, "Cascadia Code", Consolas, monospace; font-size: 13px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

header { display: flex; align-items: center; gap: 24px; padding: 10px 24px; background: var(--panel); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 5; }
.brand { font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 8px; font-size: 17px; }
.logo { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 7px; background: var(--primary); color: #fff; font-size: 15px; }
nav { display: flex; gap: 4px; flex: 1; }
nav a { padding: 6px 12px; border-radius: 8px; color: var(--muted); }
nav a.active, nav a:hover { background: var(--idle-bg); color: var(--text); }
.me { display: flex; align-items: center; gap: 10px; }
.me img { width: 28px; height: 28px; border-radius: 50%; background: var(--idle-bg); }

main { max-width: 1100px; margin: 0 auto; padding: 24px 16px 60px; }
.center { max-width: 520px; margin: 10vh auto; text-align: center; }
.card { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; }
.center.card { text-align: left; }
.stack > * + * { margin-top: 16px; }
.row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.between { justify-content: space-between; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); }
.page-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 16px; margin-bottom: 20px; flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--panel); color: var(--text); font: inherit; font-weight: 600; cursor: pointer; }
.btn:hover { border-color: var(--muted); }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn.danger { color: var(--bad); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.small { padding: 4px 10px; font-size: 13px; }
.btn.big { padding: 12px 22px; font-size: 16px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }

input[type=text], input[type=password], select, textarea { width: 100%; padding: 9px 11px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); color: var(--text); font: inherit; }
label { display: block; font-weight: 600; margin-bottom: 4px; }
.hint { color: var(--muted); font-size: 13px; margin-top: 4px; }
.checks { display: flex; gap: 16px; flex-wrap: wrap; }
.checks label { font-weight: 500; display: flex; gap: 6px; align-items: center; }

.badge { display: inline-flex; align-items: center; gap: 6px; padding: 2px 10px; border-radius: 999px; font-size: 12.5px; font-weight: 600; background: var(--idle-bg); color: var(--muted); white-space: nowrap; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.warn { background: var(--warn-bg); color: var(--warn); }
.badge.bad { background: var(--bad-bg); color: var(--bad); }
.badge.info { background: var(--info-bg); color: var(--info); }
.dot { width: 9px; height: 9px; border-radius: 50%; background: var(--muted); display: inline-block; }
.dot.ok { background: var(--ok); } .dot.bad { background: var(--bad); }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { font-size: 12.5px; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .03em; }
tr:last-child td { border-bottom: none; }
.table-wrap { overflow-x: auto; }

.target { display: flex; justify-content: space-between; align-items: center; padding: 8px 0; border-top: 1px solid var(--line); gap: 8px; }
.target:first-child { border-top: none; }

.log { background: var(--log-bg); color: var(--log-text); border-radius: var(--radius); padding: 14px 16px; height: 60vh; overflow: auto; white-space: pre-wrap; word-break: break-word; font: 12.5px/1.55 ui-monospace, "Cascadia Code", Consolas, monospace; }
.log .w { color: #fbbf24; } .log .e { color: #f87171; } .log .s { color: #4ade80; font-weight: 700; } .log .h { color: #93c5fd; font-weight: 700; }
.callout { border-radius: var(--radius); padding: 14px 16px; border: 1px solid var(--line); }
.callout.go { background: var(--info-bg); border-color: transparent; }
.callout.ok { background: var(--ok-bg); border-color: transparent; }
.callout.bad { background: var(--bad-bg); border-color: transparent; }

#toast { position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 8px; max-width: 90vw; z-index: 20; }
.steps { counter-reset: s; padding: 0; list-style: none; }
.steps li { counter-increment: s; position: relative; padding-left: 36px; margin-bottom: 14px; }
.steps li::before { content: counter(s); position: absolute; left: 0; top: 0; width: 24px; height: 24px; border-radius: 50%; background: var(--primary); color: #fff; display: grid; place-items: center; font-size: 13px; font-weight: 700; }

@media (max-width: 640px) {
  header { flex-wrap: wrap; gap: 10px; padding: 10px 16px; }
  .me span { display: none; }
  .grid { grid-template-columns: 1fr; }
}