/* ==========================================================================
   Base – reset tối giản, typography, layout primitives, accessibility
   ========================================================================== */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-h) + 16px); }
body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: var(--lh-base);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg, picture { display: block; max-width: 100%; height: auto; }
h1, h2, h3, p, ul, ol, figure { margin: 0; }
ul[role="list"], ol[role="list"] { list-style: none; padding: 0; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; }

a { color: var(--color-accent); text-underline-offset: 3px; }
a:hover { color: var(--color-accent-hover); }

/* Focus rõ ràng – không tắt outline (PRD 5.5) */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.l-container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-8);
}
@media (max-width: 1023.98px) {
  .l-container { padding-inline: var(--space-4); }
}

.u-mono { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
.u-muted { color: var(--color-text-muted); }

.sr-only {
  position: absolute !important; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute; left: var(--space-4); top: -100px; z-index: 100;
  background: var(--color-accent); color: var(--color-on-accent);
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm); font-weight: 700;
}
.skip-link:focus { top: var(--space-3); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
}