* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; }
body {
  font-family: "Segoe UI", Tahoma, sans-serif;
  background-color: var(--bg-desktop);
  background-image: radial-gradient(var(--bg-desktop-dot) 2px, transparent 2px);
  background-size: 16px 16px;
  padding: 12px;
}
button {
  background: var(--bg-btn);
  border: var(--border);
  border-radius: 6px;
  color: var(--color-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  padding: 0;
}
button:hover { filter: brightness(0.95); }