:root {
  --bg: #0f1420;
  --panel: #171e2e;
  --panel2: #1e2739;
  --border: #2a3550;
  --text: #e8edf7;
  --muted: #8a97b1;
  --green: #25d366;
  --blue: #4f8cff;
  --red: #ff5c6c;
  --yellow: #ffcc4d;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg); color: var(--text);
  min-height: 100vh;
}
a { color: var(--blue); text-decoration: none; }
.container { max-width: 1100px; margin: 0 auto; padding: 24px; }

/* topbar */
.topbar { background: var(--panel); border-bottom: 1px solid var(--border); padding: 14px 24px; display: flex; align-items: center; gap: 16px; }
.topbar .brand { font-weight: 700; color: var(--green); font-size: 18px; }
.topbar .spacer { flex: 1; }
.btn-logout { background: none; border: 1px solid var(--border); color: var(--muted); padding: 6px 14px; border-radius: 6px; cursor: pointer; }
.btn-logout:hover { color: var(--text); border-color: var(--red); }

/* tabs */
.tabs { display: flex; gap: 6px; margin: 20px 0; flex-wrap: wrap; }
.tabs button {
  background: var(--panel); border: 1px solid var(--border); color: var(--muted);
  padding: 9px 18px; border-radius: 8px; cursor: pointer; font-size: 14px;
}
.tabs button.active { background: var(--blue); color: #fff; border-color: var(--blue); }

/* cards & panels */
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 10px; padding: 20px; margin-bottom: 18px; }
.card h3 { margin-bottom: 14px; font-size: 16px; }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 14px; }
.stat { background: var(--panel2); border: 1px solid var(--border); border-radius: 8px; padding: 16px; }
.stat .num { font-size: 28px; font-weight: 700; color: var(--blue); }
.stat .lbl { color: var(--muted); font-size: 13px; margin-top: 4px; }

/* tables */
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; }
tr:hover td { background: rgba(79,140,255,0.05); }

/* badges */
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 11.5px; font-weight: 600; }
.badge.live { background: rgba(37,211,102,.15); color: var(--green); }
.badge.qr, .badge.connecting, .badge.new { background: rgba(255,204,77,.15); color: var(--yellow); }
.badge.disconnected, .badge.error, .badge.suspended { background: rgba(255,92,108,.15); color: var(--red); }
.badge.active { background: rgba(79,140,255,.15); color: var(--blue); }

/* forms */
label { display: block; color: var(--muted); font-size: 13px; margin-bottom: 6px; }
input, select {
  width: 100%; background: var(--panel2); border: 1px solid var(--border);
  color: var(--text); padding: 10px 12px; border-radius: 8px; font-size: 14px; margin-bottom: 12px;
}
input:focus { outline: none; border-color: var(--blue); }
button.btn {
  background: var(--blue); color: #fff; border: none; padding: 10px 20px;
  border-radius: 8px; cursor: pointer; font-size: 14px; font-weight: 600;
}
button.btn:hover { filter: brightness(1.15); }
button.btn.green { background: var(--green); }
button.btn.red { background: var(--red); }
button.btn.small { padding: 5px 12px; font-size: 12px; }
button.btn.ghost { background: none; border: 1px solid var(--border); color: var(--muted); }
button.btn.ghost:hover { color: var(--text); }

/* misc */
.muted { color: var(--muted); font-size: 13px; }
.mono { font-family: Consolas, monospace; }
.keybox {
  background: var(--panel2); border: 1px solid var(--border); border-radius: 8px;
  padding: 12px 14px; font-family: Consolas, monospace; font-size: 13px;
  word-break: break-all; display: flex; align-items: center; gap: 10px; justify-content: space-between;
}
.qr-wrap { text-align: center; padding: 20px; }
.qr-wrap img { border-radius: 12px; background: #fff; padding: 10px; }
.msg-row { border-bottom: 1px solid var(--border); padding: 10px 4px; }
.msg-row .meta { color: var(--muted); font-size: 12px; margin-bottom: 3px; }
.otp-pill { background: rgba(37,211,102,.15); color: var(--green); padding: 2px 10px; border-radius: 12px; font-weight: 700; }
.empty { color: var(--muted); text-align: center; padding: 30px; }

/* login */
.login-box { max-width: 380px; margin: 12vh auto; }
.login-box .card { padding: 30px; }
.login-box h2 { text-align: center; color: var(--green); margin-bottom: 4px; }
.login-box p.sub { text-align: center; color: var(--muted); font-size: 13px; margin-bottom: 20px; }

/* modal */
.modal-bg { position: fixed; inset: 0; background: rgba(0,0,0,.6); display: none; align-items: center; justify-content: center; z-index: 100; }
.modal-bg.show { display: flex; }
.modal { background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: 26px; width: 400px; max-width: 92vw; }
.toast { position: fixed; bottom: 24px; right: 24px; background: var(--panel2); border: 1px solid var(--border); padding: 12px 20px; border-radius: 8px; display: none; z-index: 200; }
.toast.show { display: block; }
.toast.err { border-color: var(--red); }