* { box-sizing: border-box; }
html { color-scheme: dark; }
body { margin: 0; min-height: 100vh; font-family: Arial, Helvetica, sans-serif; background: var(--perksi-bg); color: var(--perksi-text); }
a { color: inherit; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; }