/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
img, video { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* Skip link */
.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-4);
  padding: var(--space-3) var(--space-5);
  background: var(--color-brass);
  color: var(--color-bone);
  font-family: var(--font-body);
  font-size: var(--type-body-xs);
  font-weight: 600;
  letter-spacing: var(--tracking-button);
  text-transform: uppercase;
  z-index: 9999;
  transition: top var(--duration-fast) var(--ease-default);
}
.skip-link:focus { top: var(--space-4); }

/* Base typography */
body {
  font-family: var(--font-body);
  font-size: var(--type-body-md);
  line-height: var(--leading-body);
  color: var(--color-text-primary);
  background: var(--color-bone);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: var(--leading-heading);
  letter-spacing: var(--tracking-display);
  color: var(--color-text-primary);
}

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

/* Layout primitives */
.container {
  width: 100%;
  max-width: var(--container-default);
  margin-inline: auto;
  padding-inline: var(--gutter-desktop);
}
.container--narrow  { max-width: var(--container-narrow); }
.container--wide    { max-width: var(--container-wide); }
.container--edge    { max-width: var(--container-edge); }

@media (max-width: 1024px) {
  .container { padding-inline: var(--gutter-tablet); }
}
@media (max-width: 480px) {
  .container { padding-inline: var(--gutter-mobile); }
}

/* Section rhythm */
.section {
  padding-block: var(--space-11);
}
@media (max-width: 768px) {
  .section { padding-block: var(--space-9); }
}

.section--bone      { background: var(--color-bone); }
.section--limestone { background: var(--color-limestone); }
.section--iron      { background: var(--color-iron); }
.section--iron-soft { background: var(--color-iron-soft); }

/* Focus styles */
*:focus-visible {
  outline: 2px solid var(--color-brass);
  outline-offset: 2px;
}

/* Reveal animation base */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--duration-slow) var(--ease-out),
              transform var(--duration-slow) var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }