:root {
    --bg: #0e1116;
    --panel: #171b22;
    --panel-2: #1e232c;
    --border: #2a313c;
    --text: #e6e9ef;
    --muted: #8b94a3;
    --accent: #4f8cff;
    --accent-soft: rgba(79,140,255,.14);
    --green: #3fb950;
    --amber: #d29922;
    --red: #f25c54;
    --radius: 12px;
  }
  [data-theme="light"] {
    --bg: #f4f6fa;
    --panel: #ffffff;
    --panel-2: #f0f3f8;
    --border: #e1e6ee;
    --text: #1a1f28;
    --muted: #66707f;
    --accent-soft: rgba(79,140,255,.10);
  }
  * { box-sizing: border-box; }
  body {
    margin: 0; font-family: -apple-system, "Segoe UI", system-ui, sans-serif;
    background: var(--bg); color: var(--text); -webkit-font-smoothing: antialiased;
  }
  /* ---------- top bar ---------- */
  header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px 28px; border-bottom: 1px solid var(--border);
    background: var(--panel); position: sticky; top: 0; z-index: 5;
  }
  .brand { display: flex; align-items: center; gap: 11px; font-weight: 650; font-size: 16px; }
  .brand .dot { width: 11px; height: 11px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(63,185,80,.16); }
  .brand small { color: var(--muted); font-weight: 400; }
  .top-actions { display: flex; align-items: center; gap: 14px; }
  .theme-toggle { cursor: pointer; background: var(--panel-2); border: 1px solid var(--border); color: var(--text); border-radius: 8px; padding: 7px 12px; font-size: 13px; }
  .who { color: var(--muted); font-size: 13px; }

  /* ---------- layout ---------- */
  .wrap { max-width: 1080px; margin: 0 auto; padding: 28px; }

  /* ---------- stat cards ---------- */
  .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 24px; }
  .stat { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; }
  .stat .label { color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; }
  .stat .value { font-size: 26px; font-weight: 650; margin-top: 6px; }
  .stat .value small { font-size: 14px; color: var(--muted); font-weight: 400; }

  /* ---------- toolbar ---------- */
  .toolbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
  .toolbar h2 { font-size: 17px; margin: 0; }
  .btn-primary {
    background: var(--accent); color: #fff; border: none; border-radius: 9px;
    padding: 10px 16px; font-size: 14px; font-weight: 600; cursor: pointer; display: inline-flex; align-items: center; gap: 7px;
  }
  .btn-primary:hover { filter: brightness(1.08); }

  /* ---------- table ---------- */
  .card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
  table { width: 100%; border-collapse: collapse; }
  th, td { text-align: left; padding: 13px 16px; font-size: 14px; }
  th { color: var(--muted); font-weight: 500; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; border-bottom: 1px solid var(--border); }
  tbody tr { border-bottom: 1px solid var(--border); }
  tbody tr:last-child { border-bottom: none; }
  tbody tr:hover { background: var(--panel-2); }
  .name { font-weight: 600; }
  .name small { display: block; color: var(--muted); font-weight: 400; font-size: 12px; margin-top: 2px; }
  .badge { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; padding: 3px 9px; border-radius: 20px; }
  .badge.on { color: var(--green); background: rgba(63,185,80,.12); }
  .badge.off { color: var(--amber); background: rgba(210,153,34,.13); }
  .badge .d { width: 7px; height: 7px; border-radius: 50%; background: currentColor; }
  .traffic-bar { height: 5px; background: var(--panel-2); border-radius: 3px; margin-top: 6px; overflow: hidden; }
  .traffic-bar i { display: block; height: 100%; background: var(--accent); border-radius: 3px; }
  .term { font-size: 13px; }
  .term.unlim { color: var(--muted); }
  .term.dated { color: var(--text); }
  .actions { display: flex; gap: 6px; justify-content: flex-end; }
  .icon-btn {
    width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--border);
    background: var(--panel-2); color: var(--text); cursor: pointer; font-size: 14px;
    display: inline-flex; align-items: center; justify-content: center;
  }
  .icon-btn:hover { border-color: var(--accent); color: var(--accent); }
  .icon-btn.danger:hover { border-color: var(--red); color: var(--red); }
  .muted { color: var(--muted); }

  /* ---------- modal ---------- */
  .overlay {
    position: fixed; inset: 0; background: rgba(0,0,0,.55); display: none;
    align-items: center; justify-content: center; z-index: 20; padding: 20px;
  }
  .overlay.show { display: flex; }
  .modal { background: var(--panel); border: 1px solid var(--border); border-radius: 16px; width: 420px; max-width: 100%; padding: 24px; }
  .modal h3 { margin: 0 0 4px; font-size: 18px; }
  .modal p.sub { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
  .field { margin-bottom: 16px; }
  .field label { display: block; font-size: 13px; margin-bottom: 6px; color: var(--muted); }
  .field input[type=text] {
    width: 100%; padding: 10px 12px; border-radius: 9px; border: 1px solid var(--border);
    background: var(--panel-2); color: var(--text); font-size: 14px;
  }
  .seg { display: flex; gap: 8px; }
  .seg button {
    flex: 1; padding: 9px; border-radius: 9px; border: 1px solid var(--border);
    background: var(--panel-2); color: var(--text); cursor: pointer; font-size: 13px;
  }
  .seg button.active { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); font-weight: 600; }
  .modal-actions { display: flex; gap: 10px; margin-top: 22px; }
  .btn-ghost { flex: 1; padding: 11px; border-radius: 9px; border: 1px solid var(--border); background: transparent; color: var(--text); cursor: pointer; font-size: 14px; }

  /* ---------- qr modal ---------- */
  .qr-wrap { text-align: center; }
  .qr-box { width: 200px; height: 200px; margin: 6px auto 16px; background: #fff; border-radius: 12px; padding: 14px; }
  .qr-box svg { width: 100%; height: 100%; }
  .conf-actions { display: flex; gap: 10px; }
  .conf-actions button { flex: 1; padding: 11px; border-radius: 9px; font-size: 14px; cursor: pointer; border: 1px solid var(--border); }
  .conf-actions .dl { background: var(--accent); color: #fff; border: none; font-weight: 600; }
  .hint { background: var(--accent-soft); border-radius: 9px; padding: 11px 13px; font-size: 12.5px; color: var(--text); margin-bottom: 16px; text-align: left; line-height: 1.45; }

  @media (max-width: 720px) {
    .stats { grid-template-columns: repeat(2, 1fr); }
    .col-hide { display: none; }
    .wrap { padding: 16px; }
  }
.login-body{display:flex;align-items:center;justify-content:center;height:100vh}
.login-card{background:var(--panel);border:1px solid var(--border);border-radius:16px;padding:32px;width:320px;display:flex;flex-direction:column;gap:14px}
.login-card input{padding:11px 13px;border-radius:9px;border:1px solid var(--border);background:var(--panel-2);color:var(--text);font-size:14px}
.login-card button{background:var(--accent);color:#fff;border:none;border-radius:9px;padding:11px;font-size:14px;cursor:pointer}
.login-card .err{color:var(--red);font-size:13px;margin:0}