:root {
  color-scheme: light dark;
  --bg: #0f172a;
  --panel: #111827;
  --panel-border: #1f2937;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --accent: #38bdf8;
  --danger: #f87171;
  --ok: #4ade80;
  --warn: #fbbf24;
  font-family: Inter, system-ui, sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: linear-gradient(180deg, #020617 0%, #0f172a 100%);
  color: var(--text);
  min-height: 100vh;
}

header, main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px;
}

header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
}

h1, h2 {
  margin: 0;
}

.subtitle, .muted {
  color: var(--muted);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

main {
  display: grid;
  gap: 20px;
}

.panel {
  background: rgba(17, 24, 39, 0.92);
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  padding: 20px;
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.device-list {
  display: grid;
  gap: 12px;
}

.device-card {
  border: 1px solid var(--panel-border);
  border-radius: 12px;
  padding: 14px 16px;
  cursor: pointer;
  transition: border-color 0.15s ease, transform 0.15s ease;
}

.device-card:hover,
.device-card.selected {
  border-color: var(--accent);
  transform: translateY(-1px);
}

.device-card-top {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.device-title {
  font-weight: 600;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  background: #1f2937;
}

.badge.online { color: var(--ok); }
.badge.offline { color: var(--muted); }
.badge.ok { color: var(--ok); }
.badge.error { color: var(--danger); }

.device-meta {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.device-detail {
  display: grid;
  gap: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
  white-space: pre-wrap;
}

.empty-state {
  color: var(--muted);
  font-family: inherit;
}

.command-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.hidden { display: none; }

button {
  border: 1px solid var(--panel-border);
  background: #1f2937;
  color: var(--text);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
}

button:hover {
  border-color: var(--accent);
}

button.primary {
  border-color: #0369a1;
  background: #075985;
}

button.danger {
  border-color: #991b1b;
  background: #7f1d1d;
}

.command-log {
  display: grid;
  gap: 10px;
}

.log-item {
  border-left: 3px solid var(--accent);
  padding: 8px 12px;
  background: #0b1220;
  border-radius: 8px;
  font-size: 14px;
}

.log-item.error {
  border-left-color: var(--danger);
}

@media (min-width: 960px) {
  main {
    grid-template-columns: 1.1fr 0.9fr;
  }

  .panel:last-child {
    grid-column: 1 / -1;
  }
}