:root {
  --bg: #0f1220;
  --bg-soft: #171a2b;
  --card: #1b1f34;
  --text: #e7eaf6;
  --muted: #a5acca;
  --primary: #6a8dff;
  --primary-700: #4a6ceb;
  --success: #36d399;
  --danger: #ef4444;
  --border: #2a2f45;
  --chip: #242a43;
  --shadow: 0 8px 24px rgba(0,0,0,0.25);
  --radius: 12px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial; }

.app-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px; border-bottom: 1px solid var(--border); background: var(--bg-soft);
  position: sticky; top: 0; z-index: 10;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.brand .logo {
  height: 24px;
  width: auto;
  display: block;
  object-fit: contain;
}
.title { letter-spacing: 0.5px; }
.me-info { color: var(--muted); margin-right: 10px; font-size: 14px; }

.container { max-width: 1100px; margin: 28px auto; padding: 0 16px; }

.card {
  background: linear-gradient(180deg, var(--card), #161a2e);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
}
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }

label { display: block; margin: 10px 0; color: var(--muted); font-size: 14px; }
input {
  margin-top: 6px; width: 100%; padding: 12px 14px;
  border-radius: 10px; border: 1px solid var(--border); background: #11152a; color: var(--text);
}
.btn { border: 0; padding: 10px 14px; border-radius: 10px; cursor: pointer; transition: 0.15s; font-weight: 600; }
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-700); }
.btn-secondary { background: #283154; color: #dfecff; }
.btn-secondary:hover { background: #303a63; }

.error { color: var(--danger); margin-top: 8px; }
.muted { color: var(--muted); }

.peers-grid { display: grid; grid-template-columns: repeat(1, minmax(0, 1fr)); gap: 14px; margin-top: 8px; }
@media (min-width: 720px) { .peers-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (min-width: 1080px) { .peers-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); } }

.peer {
  background: var(--chip); border: 1px solid var(--border); border-radius: 12px; padding: 14px;
  display: flex; flex-direction: column; gap: 8px;
}
.peer-head { display: flex; align-items: center; justify-content: space-between; }
.peer-name { font-weight: 700; }
.badge { padding: 4px 8px; border-radius: 999px; font-size: 12px; font-weight: 700; }
.badge.online { background: rgba(54, 211, 153, 0.15); color: var(--success); border: 1px solid rgba(54,211,153,0.4); }
.badge.offline { background: rgba(239, 68, 68, 0.12); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }

.kv { display: grid; grid-template-columns: 80px 1fr; gap: 6px; font-size: 13px; color: var(--muted); }
.kv .k { color: #b7bfdb; }