*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
button { font: inherit; color: inherit; background: none; border: none; cursor: pointer; }
input, select, textarea { font: inherit; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--sp-24); }
.section { padding: var(--sp-80) 0; }
.bg-muted { background-color: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.text-center { text-align: center; }
.mt-32 { margin-top: var(--sp-32); }

h1, h2, h3, h4 { line-height: 1.2; font-weight: 600; }
h1 { font-size: 3rem; }
h2 { font-size: 2.25rem; margin-bottom: var(--sp-16); }
h3 { font-size: 1.25rem; }
.section-desc { font-size: 1.125rem; color: var(--text-secondary); max-width: 600px; margin: 0 auto var(--sp-48); }

.skip-link {
  position: absolute; top: -40px; left: 0; background: var(--primary); color: #fff;
  padding: var(--sp-8); z-index: 1000; transition: top 0.2s;
}
.skip-link:focus { top: 0; }
:focus-visible { outline: 2px solid var(--focus-ring); outline-offset: 2px; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); border: 0;
}
.no-scroll { overflow: hidden; }
.numeric { font-variant-numeric: tabular-nums; }
::selection { background: var(--primary); color: #fff; }

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}
html { scroll-padding-top: 80px; scroll-behavior: smooth; }
body { overflow-x: hidden; }