:root {
  --bg: #0b0f14;
  --panel:#11161d;
  --muted:#8a97a7;
  --text:#e8eef6;
  --brand:#6c8cff;
  --ok:#2ec27e;
  --bad:#ff6b6b;
  --border: #1f2a36;
  --shadow: 0 4px 20px rgba(0,0,0,.25);
  --radius: 14px;
  --gap: 16px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:#f6f8fb;
    --panel:#ffffff;
    --muted:#667085;
    --text:#0b1220;
    --brand:#3b5bfd;
    --ok:#198754;
    --bad:#e44;
    --border:#e7ecf3;
    --shadow: 0 6px 24px rgba(16,24,40,.08);
  }
}

/* Reset minimal */
* { box-sizing: border-box }
html { color-scheme: light dark }
body{
  margin:0;
  background:var(--bg);
  color:var(--text);
  font: 400 16px/1.55 system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji";
}


.diagnostics-preview {
  position: relative;
  min-height: 460px;
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  align-items: stretch;
  justify-content: center;
  background: color-mix(in oklab, var(--panel) 92%, transparent);
}

.diagnostics-preview canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.webgpu-unsupported {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  padding: 32px;
  max-width: min(600px, 90%);
  margin: auto;
  border-radius: var(--radius);
  border: 1px dashed color-mix(in oklab, var(--border) 80%, transparent);
  background: color-mix(in oklab, var(--panel) 92%, transparent);
  backdrop-filter: blur(3px);
  text-align: left;
  color: var(--text);
  box-shadow: var(--shadow);
}

.webgpu-unsupported h3 {
  margin: 0;
  font-size: clamp(18px, 1.4vw + 14px, 22px);
}

.webgpu-unsupported p {
  margin: 0;
  color: var(--muted);
}


.webgpu-unsupported ol {
  margin: 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--muted);
}

.webgpu-unsupported li {
  line-height: 1.4;
}

.webgpu-unsupported code,
.webgpu-unsupported em {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-style: normal;
  color: var(--text);
}