/* Base reset + typography + global elements */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-image:
    radial-gradient(at 5% 8%, rgba(184, 99, 90, 0.05), transparent 35%),
    radial-gradient(at 95% 92%, rgba(26, 23, 21, 0.04), transparent 40%);
  min-height: 100vh;
}

/* Subtle grain overlay — CSS-only atmospheric layer (Phase 5) */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.025;
  mix-blend-mode: multiply;
  z-index: 1;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0.6 0'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.01em;
  text-wrap: balance;
  margin: 0;
}

p { margin: 0; text-wrap: pretty; }

a {
  color: var(--ink);
  text-decoration: underline;
  text-decoration-color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
  transition: color var(--dur-standard) var(--ease-signature);
}
a:hover { color: var(--accent); }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 2px;
}

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-muted);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

::selection {
  background: var(--accent);
  color: var(--bg);
}

/* Skip link — a11y */
.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  background: var(--ink);
  color: var(--bg);
  padding: 12px 20px;
  z-index: 100;
  font-family: var(--font-mono);
  font-size: 13px;
  text-decoration: none;
}
.skip-link:focus { top: 16px; }