:root {
  color-scheme: light;
  --bg: #f4f1ea;
  --card: #fffdf8;
  --ink: #1d2430;
  --muted: #667085;
  --line: #e6dfd2;
  --accent: #1f6feb;
  --ok: #067647;
  --bad: #b42318;
  --warn: #b54708;
}
* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background:
    radial-gradient(900px 400px at 10% -10%, #dbe7ff 0%, transparent 50%),
    radial-gradient(700px 360px at 100% 0%, #ffe8c8 0%, transparent 46%),
    var(--bg);
  color: var(--ink);
}
a { color: var(--accent); text-decoration: none; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 28px 18px 48px; }
.nav {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 22px;
}
.brand { font-weight: 700; letter-spacing: .02em; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 10px 30px rgba(60, 40, 10, .06);
  padding: 22px;
}
h1, h2, h3 { margin: 0 0 12px; }
.muted { color: var(--muted); }
.grid { display: grid; gap: 14px; }
.grid.stats { grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); margin: 16px 0 22px; }
.stat { padding: 14px 16px; }
.stat b { display: block; font-size: 26px; margin-top: 6px; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 6px; }
input, select, textarea {
  width: 100%; padding: 10px 12px; border-radius: 10px;
  border: 1px solid #d8d0c3; background: #fff; font: inherit;
}
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: end; }
.row > * { flex: 1; min-width: 140px; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
button, .btn {
  border: 0; border-radius: 10px; padding: 10px 14px; font: inherit;
  background: var(--accent); color: #fff; cursor: pointer;
}
.btn.gray, button.gray { background: #3f4a5a; }
.btn.danger, button.danger { background: var(--bad); }
.btn.light, button.light { background: #efe8db; color: var(--ink); }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
.tag { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; }
.tag.on { background: #d1fadf; color: var(--ok); }
.tag.off { background: #fee4e2; color: var(--bad); }
.tag.plan { background: #e8effc; color: #1849a9; }
.flash { padding: 10px 12px; border-radius: 10px; margin-bottom: 12px; }
.flash.ok { background: #dcfae6; color: var(--ok); }
.flash.err { background: #fee4e2; color: var(--bad); }
.login { max-width: 420px; margin: 8vh auto; }
code, .mono { font-family: ui-monospace, Consolas, monospace; word-break: break-all; }
.subbox { background: #f7f3ea; border-radius: 12px; padding: 12px; }
.qrbox { display: grid; grid-template-columns: 220px 1fr; gap: 18px; align-items: start; }
.qr {
  width: 220px; min-height: 220px; background: #fff; border: 1px solid var(--line);
  border-radius: 16px; padding: 10px; display: flex; align-items: center; justify-content: center;
}
.qr svg { width: 200px; height: 200px; display: block; }
@media (max-width: 720px) {
  .qrbox { grid-template-columns: 1fr; }
  .qr, .qr svg { width: 240px; height: 240px; margin: 0 auto; }
  .wrap { padding: 16px 10px 36px; }
  table { min-width: 720px; }
}