*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
/* Stop iOS Safari from rescaling text on orientation flip (common
   regression: portrait→landscape jumps font sizes mid-session). The
   chrome handles its own zoom via the meta viewport. */
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 14px;
  line-height: 1.45;
  color: var(--fg);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
button:disabled { cursor: not-allowed; opacity: 0.55; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
kbd {
  font-family: var(--font-mono);
  font-size: 0.85em;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border);
}
code { font-family: var(--font-mono); }
h1, h2, h3, p { margin: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--surface-4); }