*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-main);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}
img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}
input, button, textarea, select {
  font: inherit;
  color: inherit;
}
button {
  cursor: pointer;
  background: none;
  border: none;
}
a {
  color: inherit;
  text-decoration: none;
}
ul, ol {
  list-style: none;
}
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}
h1 { font-size: var(--text-4xl); }
h2 { font-size: var(--text-3xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }
h5 { font-size: var(--text-lg); }
p { margin-bottom: var(--space-md); }
p:last-child { margin-bottom: 0; }
strong, b { font-weight: 600; }
table { border-collapse: collapse; width: 100%; }
.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;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
::selection {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

/* Responsive images */
img { max-width: 100%; height: auto; }

/* Scrollable tables on mobile */
.table-wrapper, .article-content table { overflow-x: auto; -webkit-overflow-scrolling: touch; }