:root {
  --bg: #0f1419;
  --panel: #1a2028;
  --panel-2: #232b36;
  --border: #2a3340;
  --text: #e6e9ef;
  --muted: #8a94a3;
  --accent: #4fc3f7;
  --accent-2: #ff7043;
  --good: #66bb6a;
  --bad: #ef5350;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, system-ui, "Segoe UI", Roboto, Helvetica, Arial,
    sans-serif; font-size: 15px; line-height: 1.5; }

.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 24px; background: var(--panel);
  border-bottom: 1px solid var(--border); flex-wrap: wrap; gap: 12px;
}
.brand { color: var(--accent); font-weight: 700; font-size: 18px; text-decoration: none; }
.nav { display: flex; gap: 16px; flex-wrap: wrap; }
.nav a { color: var(--text); text-decoration: none; font-size: 14px; }
.nav a:hover { color: var(--accent); }

.container { max-width: 1100px; margin: 24px auto; padding: 0 24px; }

h1 { font-size: 22px; margin: 0 0 16px; }
h2 { font-size: 18px; margin: 24px 0 12px; }

.card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 8px; padding: 20px; margin-bottom: 16px;
}

.row { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.row > * { flex: 0 0 auto; }
.grow { flex: 1 1 auto; }

input, select, textarea, button {
  background: var(--panel-2); color: var(--text);
  border: 1px solid var(--border); border-radius: 6px;
  padding: 8px 12px; font-size: 14px; font-family: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); }
input[type=file] { padding: 6px; }

button {
  cursor: pointer; background: var(--accent); color: #06121a;
  border: none; font-weight: 600;
}
button:hover { filter: brightness(1.1); }
button.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
button.danger { background: var(--bad); color: white; }
button.warn { background: var(--accent-2); color: #1a0a05; }
button:disabled { opacity: .5; cursor: not-allowed; }

label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 4px; }

table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { color: var(--muted); font-weight: 500; font-size: 13px; text-transform: uppercase;
  letter-spacing: .04em; }
tr:hover td { background: var(--panel-2); }

.muted { color: var(--muted); }
.tag { display: inline-block; padding: 2px 8px; border-radius: 12px;
  font-size: 12px; background: var(--panel-2); }
.tag.good { background: rgba(102,187,106,.15); color: var(--good); }
.tag.bad { background: rgba(239,83,80,.15); color: var(--bad); }
.tag.warn { background: rgba(255,112,67,.15); color: var(--accent-2); }

.code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  background: var(--panel-2); padding: 2px 6px; border-radius: 4px;
  font-size: 13px; word-break: break-all; }

.toast {
  position: fixed; bottom: 24px; right: 24px;
  background: var(--panel-2); border: 1px solid var(--border);
  padding: 12px 16px; border-radius: 6px; max-width: 320px;
  box-shadow: 0 4px 16px rgba(0,0,0,.4); transition: opacity .3s;
}
.toast.bad { border-color: var(--bad); }
.toast.good { border-color: var(--good); }

.dev-card {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px; background: var(--panel-2); border-radius: 6px;
  margin-bottom: 12px; gap: 16px;
}
.dev-card .info { flex: 1; }
.dev-card .info .name { font-weight: 600; font-size: 16px; }
.dev-card .info .meta { color: var(--muted); font-size: 13px; margin-top: 2px; }
.dev-card .controls { display: flex; gap: 8px; flex-wrap: wrap; }

.online { color: var(--good); }
.offline { color: var(--muted); }

.volume-slider { width: 120px; }

.empty { text-align: center; color: var(--muted); padding: 32px; }

@media (max-width: 600px) {
  .container { padding: 0 12px; }
  .topbar { padding: 10px 12px; }
  .dev-card { flex-direction: column; align-items: stretch; }
}