*, *::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: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  min-height: 100vh;
}

h1, h2, h3, h4, h5 {
  line-height: 1.25;
  text-wrap: balance;
  color: var(--text);
  font-weight: 600;
}

h1 { font-size: 1.625rem; letter-spacing: -0.02em; }
h2 { font-size: 1.25rem;  letter-spacing: -0.015em; }
h3 { font-size: 1.0625rem; }
h4 { font-size: 0.9375rem; }

p { color: var(--text-muted); }

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover { text-decoration: underline; }

img { max-width: 100%; display: block; }

ul, ol { list-style: none; }

input, textarea, select, button {
  font: inherit;
}

hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 1.5rem 0;
}

code {
  font-family: 'JetBrains Mono', 'Fira Code', ui-monospace, monospace;
  font-size: 0.85em;
  background: var(--bg-secondary);
  padding: 0.15em 0.4em;
  border-radius: 3px;
  color: var(--text);
}

.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;
}