:root {
  --bg: #f5f6f8;
  --card: #fff;
  --line: #e3e6ea;
  --text: #1f2937;
  --muted: #6b7280;
  --brand: #4f46e5;
  --ok: #047857;
  --bad: #b91c1c;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.6 -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
}
a { color: var(--brand); text-decoration: none; }
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 24px; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 600; font-size: 16px; }
.nav { display: flex; align-items: center; gap: 12px; }
.wrap { max-width: 900px; margin: 24px auto; padding: 0 16px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 20px 22px; margin-bottom: 18px;
}
.card.narrow { max-width: 380px; margin: 40px auto; }
h1 { font-size: 20px; margin: 0 0 10px; }
h2 { font-size: 16px; margin: 0 0 10px; }
.muted { color: var(--muted); font-size: 13px; margin: 0 0 14px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
form { margin: 0; }
form.inline { display: inline; }
label { display: block; margin-bottom: 12px; font-size: 14px; }
input, textarea {
  display: block; width: 100%; margin-top: 6px; padding: 11px 12px;
  border: 1px solid var(--line); border-radius: 8px; font-size: 14px;
  background: #fafbfc; font-family: inherit;
}
input:focus, textarea:focus { outline: 2px solid #c7d2fe; border-color: var(--brand); }
button {
  padding: 11px 18px; border: 0; border-radius: 8px; background: var(--brand);
  color: #fff; font-size: 14px; cursor: pointer;
}
button:hover { filter: brightness(1.06); }
button:disabled { opacity: .6; cursor: default; }
button.ghost { background: transparent; color: var(--muted); padding: 6px 10px; }
button.danger { background: #dc2626; padding: 6px 12px; font-size: 13px; }
.msg { border-radius: 8px; padding: 12px 14px; margin-top: 14px; font-size: 14px; }
.msg.ok { background: #ecfdf5; color: var(--ok); border: 1px solid #a7f3d0; }
.msg.bad { background: #fef2f2; color: var(--bad); border: 1px solid #fecaca; margin-bottom: 14px; }
.stats { display: flex; gap: 16px; flex-wrap: wrap; }
.stat { flex: 1 1 220px; border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.stat-label { font-size: 13px; color: var(--muted); }
.stat-value { font-size: 20px; font-weight: 600; margin: 4px 0 8px; }
.bar { height: 6px; background: #eef0f3; border-radius: 4px; overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--brand); }
.stat-pct { font-size: 12px; color: var(--muted); margin-top: 6px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: middle; }
th { color: var(--muted); font-weight: 500; }
table td form { display: inline; }
details { border-bottom: 1px solid var(--line); padding: 10px 0; }
summary { cursor: pointer; font-weight: 500; }
details p { color: #374151; font-size: 14px; }
code { background: #f3f4f6; padding: 1px 5px; border-radius: 4px; font-size: 13px; }
.foot { text-align: center; color: var(--muted); font-size: 12px; padding: 20px; }