* {
  box-sizing: border-box;
}

body {
  font-family: system-ui, sans-serif;
  margin: 10px;
}

h2 {
  margin-top: 0;
}

.row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 6px;
}

button {
  padding: 5px 12px;
  border: 1px solid var(--border);
  background: var(--button-bg);
  color: var(--fg);
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

canvas {
  max-width: 100%;
}

.hidden {
  display: none;
}

.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  z-index: 5;
}

.modal {
  position: fixed;
  background: var(--panel);
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 16px;
  width: 90%;
  max-width: 480px;
  inset: 0;
  margin: auto;
  z-index: 10;
}

.modal label {
  display: block;
  margin-bottom: 6px;
}

.actions {
  margin-top: 10px;
  display: flex;
  gap: 8px;
}