:root {
  color-scheme: light dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: Canvas;
  color: CanvasText;
}

* { box-sizing: border-box; }
body { margin: 0; min-width: 320px; }
button, input, select, textarea { font: inherit; }

.shell {
  width: min(760px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0 40px;
}

.hero { margin-bottom: 24px; }
.eyebrow, .label, footer { color: color-mix(in srgb, CanvasText 62%, transparent); }
.eyebrow { font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; }
h1 { margin: 6px 0 10px; font-size: clamp(1.9rem, 6vw, 3rem); line-height: 1.05; }
.lede { max-width: 64ch; line-height: 1.55; margin: 0; }

.status-card, .panel {
  border: 1px solid color-mix(in srgb, CanvasText 18%, transparent);
  border-radius: 18px;
  background: color-mix(in srgb, Canvas 96%, CanvasText 4%);
}

.status-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  margin-bottom: 16px;
}

.label { margin: 0 0 4px; font-size: .85rem; }
.status-value { margin: 0; font-size: 1.25rem; font-weight: 750; }
.status-dot { width: 14px; height: 14px; border-radius: 999px; background: #64748b; flex: none; }
.status-dot.online { background: #16a34a; }
.status-dot.offline { background: #dc2626; }

.grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; margin-bottom: 16px; }
.panel { padding: 18px 20px; min-width: 0; }
.panel h2 { margin: 0 0 14px; font-size: 1rem; }
dl { margin: 0; }
dl div { display: grid; grid-template-columns: minmax(110px, .8fr) minmax(0, 1.2fr); gap: 12px; padding: 8px 0; border-top: 1px solid color-mix(in srgb, CanvasText 10%, transparent); }
dl div:first-child { border-top: 0; padding-top: 0; }
dt { color: color-mix(in srgb, CanvasText 62%, transparent); }
dd { margin: 0; overflow-wrap: anywhere; font-weight: 650; }
.diagnostic { margin: 0; overflow-wrap: anywhere; line-height: 1.5; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .85rem; }

.actions { margin-top: 18px; display: flex; flex-wrap: wrap; align-items: center; gap: 14px; }
button { min-height: 44px; border: 0; border-radius: 12px; padding: 10px 16px; background: #1e293b; color: white; cursor: pointer; font-weight: 750; }
button:focus-visible { outline: 3px solid Highlight; outline-offset: 3px; }
#test-result { margin: 0; }
footer { margin-top: 28px; font-size: .82rem; }

@media (max-width: 600px) {
  .shell { width: min(100% - 24px, 760px); padding-top: 22px; }
  .grid { grid-template-columns: 1fr; }
  dl div { grid-template-columns: 1fr; gap: 3px; }
}