/* 6SD Template Library — base: reset, primitives, responsive, accessibility.
   Direction-agnostic. Theming comes from tokens.css. */

*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: var(--lh-tight);
  font-weight: var(--fw-bold);
  color: var(--color-text);
  text-wrap: balance;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); line-height: var(--lh-snug); }
p { max-width: 68ch; }

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

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

ul, ol { padding-left: 1.25rem; }

/* Layout primitives */
.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--space-6); }
.container--narrow { max-width: var(--container-narrow); }
.section { padding-block: var(--section-y); }
.section--surface { background: var(--color-surface); }
.section--dark { background: var(--color-dark-bg); color: var(--color-dark-text); }
.section--dark h1, .section--dark h2, .section--dark h3 { color: var(--color-dark-text); }
.section--dark p { color: var(--color-dark-muted); }

.stack > * + * { margin-top: var(--space-4); }
.grid { display: grid; gap: var(--space-6); }
@media (min-width: 640px) { .grid--2 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 880px) { .grid--3 { grid-template-columns: repeat(3, 1fr); } }

.eyebrow {
  font-size: var(--fs-small);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
}
.lead { font-size: clamp(1.1rem, 1.6vw, 1.35rem); color: var(--color-text-muted); }
.muted { color: var(--color-text-muted); }
.center { text-align: center; }
.mx-auto { margin-inline: auto; }

/* Accessibility */
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; border-radius: var(--radius-sm); }
.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--color-accent); color: var(--color-accent-contrast);
  padding: var(--space-3) var(--space-4); border-radius: var(--radius-sm);
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}