:root{
  --bg: #0b1220;
  --panel: rgba(255,255,255,.06);
  --card: rgba(255,255,255,.08);
  --card-strong: rgba(255,255,255,.10);
  --border: rgba(255,255,255,.12);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.65);
  --muted-2: rgba(255,255,255,.52);
  --primary: #22c55e;
  --primary-2: #16a34a;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #60a5fa;
  --shadow: 0 18px 50px rgba(0,0,0,.35);
  --radius: 16px;
  --radius-sm: 12px;
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
}

@media (prefers-color-scheme: light){
  :root{
    --bg: #f3f4f6;
    --panel: rgba(17,24,39,.04);
    --card: #ffffff;
    --card-strong: #ffffff;
    --border: rgba(17,24,39,.12);
    --text: rgba(17,24,39,.92);
    --muted: rgba(17,24,39,.62);
    --muted-2: rgba(17,24,39,.52);
    --shadow: 0 16px 50px rgba(17,24,39,.12);
  }
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text);
  background:
    radial-gradient(1200px 800px at 10% 10%, rgba(96,165,250,.22), transparent 60%),
    radial-gradient(900px 700px at 80% 0%, rgba(34,197,94,.18), transparent 55%),
    radial-gradient(900px 700px at 90% 90%, rgba(245,158,11,.16), transparent 50%),
    var(--bg);
}

a{color:inherit}

.container{
  width:min(1120px, calc(100% - 32px));
  margin:0 auto;
  padding:24px 0 48px;
}

.topbar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 18px;
  border:1px solid var(--border);
  background:var(--panel);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}

.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand-logo{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg, rgba(34,197,94,.95), rgba(96,165,250,.92));
  display:grid;place-items:center;
  box-shadow: 0 10px 30px rgba(34,197,94,.22);
}
.brand-title{display:flex;flex-direction:column;min-width:0}
.brand-title strong{font-size:14px;letter-spacing:.2px}
.brand-title span{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:420px}

.actions{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}

.btn{
  appearance:none;
  border:1px solid var(--border);
  background:var(--card);
  color:var(--text);
  padding:10px 14px;
  border-radius:12px;
  font-weight:650;
  font-size:13px;
  cursor:pointer;
  transition: transform .05s ease, border-color .12s ease, background .12s ease;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
}
.btn:active{transform:translateY(1px)}
.btn:hover{border-color: rgba(255,255,255,.22)}

.btn-primary{background:linear-gradient(135deg, rgba(34,197,94,.95), rgba(22,163,74,.92));border-color:rgba(34,197,94,.45)}
.btn-primary:hover{border-color:rgba(34,197,94,.7)}

.btn-danger{background:linear-gradient(135deg, rgba(239,68,68,.95), rgba(220,38,38,.92));border-color:rgba(239,68,68,.45)}
.btn-danger:hover{border-color:rgba(239,68,68,.7)}
.btn-secondary{background:linear-gradient(135deg, rgba(96,165,250,.95), rgba(59,130,246,.92));border-color:rgba(96,165,250,.45)}
.btn-secondary:hover{border-color:rgba(96,165,250,.7)}

.btn-ghost{background:transparent}
.btn-small{padding:8px 12px;border-radius:10px;font-size:12px}

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap:14px;
  margin-top:16px;
}

.card{
  border:1px solid var(--border);
  background:var(--card);
  border-radius:var(--radius);
  padding:16px;
  box-shadow:var(--shadow);
}

.card-title{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:10px}
.card-title h2{margin:0;font-size:14px;letter-spacing:.2px}
.card-title p{margin:0;color:var(--muted);font-size:12px}

.stats{
  display:grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap:12px;
}
.stat{
  border:1px solid var(--border);
  background:var(--card-strong);
  border-radius:14px;
  padding:12px;
}
.stat .k{font-size:12px;color:var(--muted)}
.stat .v{font-size:20px;font-weight:800;margin-top:6px}

@media (max-width: 820px){
  .stats{grid-template-columns:1fr}
  .actions{justify-content:flex-start}
}

.alert{
  margin-top:14px;
  padding:12px 12px;
  border-radius:14px;
  font-size:13px;
  border:1px solid var(--border);
}
.alert-success{background:rgba(34,197,94,.12);border-color:rgba(34,197,94,.35)}
.alert-error{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.35)}
.alert-warn{background:rgba(245,158,11,.12);border-color:rgba(245,158,11,.35)}
.alert small{display:block;color:var(--muted);margin-top:6px}

.table-wrap{overflow:auto;border-radius:14px;border:1px solid var(--border)}
.table{
  width:100%;
  border-collapse:collapse;
  min-width:720px;
}
.table th,
.table td{padding:12px 12px;text-align:left;font-size:13px;border-bottom:1px solid var(--border)}
.table th{font-size:12px;color:var(--muted);font-weight:750;background:var(--panel)}
.table tr:hover td{background:rgba(255,255,255,.03)}

.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:6px 10px;
  border-radius:999px;
  font-size:12px;
  font-weight:750;
  border:1px solid var(--border);
}
.badge .dot{width:8px;height:8px;border-radius:999px;background:var(--muted)}
.badge-ok{background:rgba(34,197,94,.12);border-color:rgba(34,197,94,.35)}
.badge-ok .dot{background:var(--primary)}
.badge-bad{background:rgba(239,68,68,.12);border-color:rgba(239,68,68,.35)}
.badge-bad .dot{background:var(--danger)}
.badge-warn{background:rgba(245,158,11,.12);border-color:rgba(245,158,11,.35)}
.badge-warn .dot{background:var(--warning)}
.badge-info{background:rgba(96,165,250,.12);border-color:rgba(96,165,250,.35)}
.badge-info .dot{background:var(--info)}


.mono{font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace}

.split{
  display:grid;
  grid-template-columns: 1.2fr .8fr;
  gap:14px;
}
@media (max-width: 980px){
  .split{grid-template-columns:1fr}
}

.field{display:flex;flex-direction:column;gap:8px;margin-bottom:12px}
.label{font-size:12px;color:var(--muted);font-weight:700}
.input,
.textarea{
  border:1px solid var(--border);
  background:var(--card-strong);
  border-radius:14px;
  padding:12px 12px;
  font-size:13px;
  color:var(--text);
  outline:none;
}
.textarea{min-height:112px;resize:vertical}
.helper{font-size:12px;color:var(--muted)}

.hr{height:1px;background:var(--border);margin:14px 0}

.tabs{display:flex;gap:10px;flex-wrap:wrap}
.tab{
  border:1px solid var(--border);
  background:transparent;
  color:var(--muted);
  padding:10px 12px;
  border-radius:999px;
  font-size:12px;
  font-weight:800;
  cursor:pointer;
}
.tab[aria-selected="true"]{background:var(--card);color:var(--text);border-color:rgba(255,255,255,.22)}

.qr{
  border-radius:16px;
  border:1px dashed rgba(255,255,255,.25);
  background:rgba(0,0,0,.08);
  padding:14px;
  display:grid;
  place-items:center;
}
.qr img{max-width:260px;width:100%;height:auto;border-radius:12px;background:#fff}

.progress{
  height:10px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.06);
  overflow:hidden;
}
.progress > span{display:block;height:100%;width:0%;background:linear-gradient(90deg, rgba(96,165,250,.85), rgba(34,197,94,.85))}

.row{display:flex;align-items:center;justify-content:space-between;gap:14px}
.row .left{min-width:0}
.row .right{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:flex-end}

.small{font-size:12px;color:var(--muted)}

.toast-wrap{position:fixed;right:14px;bottom:14px;display:flex;flex-direction:column;gap:10px;z-index:9999}
.toast{
  width:min(360px, calc(100vw - 28px));
  border:1px solid var(--border);
  background:var(--card);
  box-shadow:var(--shadow);
  border-radius:16px;
  padding:12px 12px;
  font-size:13px;
}
.toast strong{display:block;margin-bottom:3px}
.toast p{margin:0;color:var(--muted)}

.kbd{
  font-size:11px;
  padding:4px 8px;
  border-radius:10px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.06);
  color:var(--muted);
}

/* ------------------------------------------------------------------
   Additions & polish (UI/UX refresh)
   ------------------------------------------------------------------ */

.link{color:var(--text);text-decoration:none}
.link:hover{text-decoration:underline}

.h1{font-size:18px;font-weight:850;letter-spacing:.2px}
.h2{font-size:14px;font-weight:800;letter-spacing:.2px}

.badge-ghost{background:rgba(255,255,255,.06);border-color:var(--border);color:var(--muted)}

.footer{margin-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.footer-right{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

.empty{padding:28px 14px;text-align:center}
.empty h3{margin:0 0 6px 0;font-size:16px}
.empty p{margin:0;color:var(--muted)}

.pairing{font-size:18px;font-weight:850;letter-spacing:.6px}

.qr{border-radius:16px;border:1px dashed rgba(255,255,255,.25);background:rgba(0,0,0,.08);padding:14px;display:flex;gap:16px;align-items:flex-start;flex-wrap:wrap}
.qr-box{width:260px;max-width:100%;border:1px solid var(--border);border-radius:16px;background:rgba(255,255,255,.04);padding:12px}
.qr-box img{display:block;width:100%;height:auto;border-radius:12px}
.qr-help{flex:1;min-width:240px}
.qr-help ol{margin:0;padding-left:18px;display:flex;flex-direction:column;gap:6px}

/* Backdrop blur is pretty but expensive on some devices.
   Enable it only when supported and only for modern browsers. */
@supports ((-webkit-backdrop-filter: blur(10px)) or (backdrop-filter: blur(10px))) {
  .topbar, .card, .toast {
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
}

/* Theme toggle: JS sets html[data-theme="dark"]. */
html[data-theme="dark"]{
  --bg: #05070b;
  --panel: rgba(255,255,255,.06);
  --card: rgba(255,255,255,.06);
  --card-strong: rgba(255,255,255,.08);
  --border: rgba(255,255,255,.10);
  --text: rgba(255,255,255,.95);
  --muted: rgba(255,255,255,.62);
  --shadow: 0 22px 50px rgba(0,0,0,.45);
}

@media (prefers-reduced-motion: reduce){
  *{scroll-behavior:auto !important;transition:none !important;animation:none !important}
}