:root {
  --bg: #f5f7fb;
  --card: #ffffff;
  --text: #222;
  --muted: #6b7280;
  --primary: #4f46e5;
  --danger: #ef4444;
  --border: #e5e7eb;
  --shadow: 0 6px 20px rgba(0,0,0,0.06);
  --radius: 16px;
}

* { 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, sans-serif;
}

.topbar {
  backdrop-filter: saturate(180%) blur(10px);
  background: rgba(255,255,255,0.7);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  padding: 24px 16px 24px 20px;
  position: relative;
}

.logo {
  height: 56px;
  width: auto;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.status { margin-left: auto; color: var(--text); }

.controls {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  background: #fff;
}
.row { display: flex; gap: 12px; align-items: end; flex-wrap: wrap; }

.field { display: flex; flex-direction: column; gap: 6px; min-width: 220px; }
.field label { font-size: 12px; color: var(--muted); }
.field input, .field select {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 8px 10px;
  background: #fff;
  width: 100%;
}

.port-row { display: flex; gap: 8px; }
#outputPath { flex: 1; }

button {
  border: none; border-radius: 12px; padding: 10px 14px; cursor: pointer;
  box-shadow: var(--shadow); background: #fff;
}
button.primary { background: var(--primary); color: #fff; }
button.danger { background: var(--danger); color: #fff; }
button.ghost { background: #fff; }

.spacer { flex: 1; }

.plots {
  padding: 16px 20px 24px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 16px;
}
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.card-head {
  display: flex; align-items: center; padding: 12px 12px;
  border-bottom: 1px solid var(--border);
}
.card-head h3 { margin: 0; font-size: 15px; font-weight: 600; }

.device-info {
  padding: 6px 10px;
  border-radius: 4px;
  background: #1e1e1e;
  color: #9ee493;
  font-size: 0.9em;
}

.plot { width: 100%; height: 480px; }
@media (max-width: 1100px) {
  .plots { grid-template-columns: 1fr; }
}