:root {
  --bg: #f4f1ec;
  --card: #fff;
  --ink: #1b1a17;
  --muted: #6b6560;
  --line: #e7e1d8;
  --orange: #e8431a;
  --orange-dark: #c43512;
  --green: #0f766e;
  --red: #b42318;
  --shadow: 0 10px 30px rgba(40, 28, 18, 0.06);
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif;
}
a { color: var(--orange); }
.top {
  background: linear-gradient(135deg, #1b1a17 0%, #3b2418 55%, #e8431a 160%);
  color: #fff;
  padding: 22px 0 26px;
}
.wrap { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }
.brand { display: flex; justify-content: space-between; gap: 16px; align-items: flex-end; flex-wrap: wrap; }
.brand h1 { margin: 0; font-size: 24px; letter-spacing: .02em; }
.brand p { margin: 6px 0 0; color: rgba(255,255,255,.78); font-size: 13px; }
.chips { display: flex; gap: 8px; flex-wrap: wrap; }
.chip {
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 12px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.16);
}
.chip.on { background: #0f766e; border-color: #0f766e; }
.chip.off { background: rgba(180, 35, 24, .35); }
.grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 16px; margin: 18px 0 40px; }
@media (max-width: 900px) { .grid { grid-template-columns: 1fr; } }
.stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: 16px 0 0; }
@media (max-width: 700px) { .stats { grid-template-columns: repeat(2, 1fr); } }
.stat, .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow);
}
.stat { padding: 14px 16px; }
.stat b { display: block; font-size: 22px; line-height: 1.2; }
.stat span { color: var(--muted); font-size: 12px; }
.card { padding: 18px 18px 16px; margin: 0 0 16px; }
.card h2 { margin: 0 0 6px; font-size: 16px; }
.card .hint { color: var(--muted); font-size: 12px; margin: 0 0 12px; line-height: 1.5; }
.row { display: flex; gap: 8px; flex-wrap: wrap; }
label { display: block; font-size: 12px; color: var(--muted); margin: 0 0 6px; }
input, select {
  width: 100%;
  border: 1px solid #d8d1c7;
  border-radius: 10px;
  padding: 9px 11px;
  margin: 0 0 10px;
  font: inherit;
  background: #fff;
}
button {
  border: 0;
  border-radius: 10px;
  background: var(--orange);
  color: #fff;
  padding: 9px 14px;
  font: inherit;
  cursor: pointer;
}
button:hover { background: var(--orange-dark); }
button.secondary { background: #4b5563; }
button.ghost { background: #fff; color: var(--ink); border: 1px solid var(--line); }
button:disabled { opacity: .55; cursor: wait; }
.flash { padding: 10px 12px; border-radius: 10px; margin: 0 0 12px; font-size: 13px; }
.flash.err { background: #fef2f2; color: var(--red); }
.flash.ok { background: #ecfdf5; color: var(--green); }
.meta { color: var(--muted); font-size: 13px; margin: 0 0 10px; }
.table-wrap { overflow: auto; border: 1px solid var(--line); border-radius: 12px; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th, td { padding: 8px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
th { background: #faf7f2; color: var(--muted); font-weight: 600; }
.thumb { width: 36px; height: 36px; border-radius: 8px; object-fit: cover; background: #eee; }
.badge { display: inline-block; border-radius: 999px; padding: 2px 8px; font-size: 11px; }
.badge.on { background: #d1fae5; color: #065f46; }
.badge.off { background: #f3f4f6; color: #4b5563; }
.logs { margin: 0; padding: 0; list-style: none; max-height: 240px; overflow: auto; }
.logs li { font-size: 12px; color: #374151; padding: 6px 0; border-bottom: 1px dashed var(--line); }
.logs code { color: var(--muted); margin-right: 8px; }
.fail { background: #fff7f6; border-radius: 10px; padding: 8px 10px; margin: 8px 0 0; font-size: 12px; color: var(--red); }
#overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(27,26,23,.35);
  align-items: center; justify-content: center;
  color: #fff; font-size: 15px; z-index: 20;
}
#overlay.show { display: flex; }
.overlay-box { background: #1b1a17; padding: 18px 22px; border-radius: 14px; }
.login-tabs { display: flex; gap: 8px; margin: 0 0 14px; }
.tab {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 7px 12px;
}
.tab.on { background: var(--orange); color: #fff; border-color: var(--orange); }
.qr-box {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 12px 8px 4px;
  border: 1px dashed var(--line);
  border-radius: 14px;
  background: #faf7f2;
}
#qr-image {
  width: 220px;
  height: 220px;
  background: #fff;
  border-radius: 12px;
}