:root {
  --bg: #0b1020;
  --panel: #121a2b;
  --panel-border: #23314d;
  --text: #eaf2ff;
  --muted: #a9b7d0;
  --accent: #60a5fa;
  --accent-strong: #2563eb;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  min-height: 100%;
  background: radial-gradient(circle at top, #172442, var(--bg) 60%);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

body {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.page-shell {
  width: min(1100px, 100%);
}

.topbar {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

h1 {
  margin: 0;
  font-size: clamp(2rem, 3vw, 3rem);
}

.subheading {
  margin: 0;
  color: var(--muted);
}

.panel {
  background: rgba(18, 26, 43, 0.9);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  box-shadow: 0 25px 50px rgba(0, 0, 0, 0.35);
  padding: 1rem;
}

.status-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  background: rgba(96, 165, 250, 0.08);
  border: 1px solid rgba(96, 165, 250, 0.24);
  color: var(--text);
}

.label {
  font-weight: 700;
  color: var(--muted);
}

.canvas-wrap {
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  background: #000;
}

canvas {
  display: block;
  width: 100%;
  max-width: 960px;
  max-height: 540px;
  background: #000;
  image-rendering: auto;
}