html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  /* prevent scrollbars */
  overflow: hidden;
}

canvas {
  width: 100vw;
  height: 100vh;
  /* remove inline spacing */
  display: block;
}

:root {
  --overlay-bg: #f5f7fa;
  --card-bg: #ffffff;
  --text-primary: #1f2933;
  --text-secondary: #4b5563;
  --text-muted: #6b7280;
  --details-bg: #f1f3f5;
  --details-text: #374151;
  --button-bg: #2563eb;
  --button-bg-hover: #1d4ed8;
  --button-text: #ffffff;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

@media (prefers-color-scheme: dark) {
  :root {
    --overlay-bg: #0f1115;
    --card-bg: #181b21;
    --text-primary: #e6e8eb;
    --text-secondary: #cfd3d8;
    --text-muted: #9aa1aa;
    --details-bg: #0f1115;
    --details-text: #aeb4bc;
    --button-bg: #3b82f6;
    --button-bg-hover: #2563eb;
    --button-text: #ffffff;
    --shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  }
}

#error {
  position: fixed;
  inset: 0;
  background: var(--overlay-bg);
  display: grid;
  place-items: center;
  font-family: system-ui, -apple-system, Segoe UI, sans-serif;
  color: var(--text-primary);
}

#error.hidden {
  display: none;
}

#error .card {
  max-width: 420px;
  padding: 24px 28px;
  background: var(--card-bg);
  border-radius: 12px;
  box-shadow: var(--shadow);
}

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

.header h1 {
  font-size: 1.25rem;
  margin: 0;
}

.icon {
  font-size: 1.5rem;
}

.summary {
  margin: 16px 0;
  color: var(--text-secondary);
}

.details summary {
  cursor: pointer;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.details pre {
  background: var(--details-bg);
  padding: 12px;
  border-radius: 8px;
  overflow-x: auto;
  font-size: 0.85rem;
  color: var(--details-text);
}

.actions {
  display: flex;
  gap: 12px;
  margin-top: 20px;
}

.actions button {
  background: var(--button-bg);
  color: var(--button-text);
  border: none;
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
}

.actions button:hover {
  background: var(--button-bg-hover);
}

.actions a {
  color: var(--text-muted);
  text-decoration: none;
  align-self: center;
}

.actions a:hover {
  text-decoration: underline;
}