/* bittwo design system — base
   @font-face declarations, minimal reset, body defaults.
   Requires tokens.css to be loaded first. */

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url('./fonts/jetbrains-mono-400.woff2') format('woff2');
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 500;
  font-display: swap;
  src: url('./fonts/jetbrains-mono-500.woff2') format('woff2');
}

@font-face {
  font-family: 'JetBrains Mono';
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url('./fonts/jetbrains-mono-600.woff2') format('woff2');
}

/* ─── reset ─── */
*, *::before, *::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  background: var(--bt-bg);
  color: var(--bt-fg);
  font-family: var(--bt-font-mono);
  font-size: var(--bt-fs-base);
  font-weight: var(--bt-fw-regular);
  line-height: var(--bt-lh-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible {
  outline: 2px solid var(--bt-amber);
  outline-offset: 2px;
}

img, svg { display: block; max-width: 100%; height: auto; }

/* ─── screen-reader only utility ─── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}