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

html {
  -webkit-text-size-adjust: 100%;
  -moz-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0 0 var(--space-4);
  color: var(--text-primary);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
}

p { margin: 0 0 var(--space-4); color: var(--text-primary); }

a {
  color: var(--lang-en);
  text-decoration: none;
  transition: color var(--transition-fast);
}
a:hover { color: var(--text-primary); }

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

button { font: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--lang-en);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

:focus:not(:focus-visible) { outline: none; }

.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  z-index: 100;
  padding: var(--space-3) var(--space-4);
  background: var(--surface-elevated);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: top var(--transition-fast);
}
.skip-link:focus { top: var(--space-4); }

hr {
  border: 0;
  border-top: 1px solid var(--border);
  margin: var(--space-8) 0;
}

::selection { background: rgba(168, 85, 247, 0.35); color: var(--text-primary); }