* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
ul { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, p { margin: 0; }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: var(--page-gutter);
  padding-right: var(--page-gutter);
}

.paper-grain {
  position: relative;
}
.paper-grain::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.5;
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3CfeColorMatrix type='matrix' values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.02 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Section rhythm */
.section {
  padding: clamp(4.5rem, 9vw, 8.5rem) 0;
}
.section-tight { padding: clamp(3rem, 6vw, 5rem) 0; }
.section-border-t { border-top: 1px solid var(--color-border); }
.section-surface { background: var(--color-surface); }
.section-ink { background: var(--color-ink); color: var(--color-paper); }

.eyebrow {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}

.section-label {
  font-size: var(--text-xs);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ink-soft);
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: block;
}

.rule {
  border: none;
  border-top: 1px solid var(--color-border);
  margin: 0;
}
.rule-v {
  width: 1px;
  background: var(--color-border);
}

h1, h2, h3, .font-display {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.08;
}

.text-muted { color: var(--color-ink-soft); }
.text-faint { color: var(--color-ink-faint); }
.accent { color: var(--color-accent); }
.italic { font-style: italic; }

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -60px;
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 0.75rem 1.25rem;
  z-index: 1000;
  transition: top var(--dur-s) var(--ease);
  border-radius: var(--radius);
}
.skip-link:focus { top: 1rem; }

/* Reveal-on-scroll */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--dur-l) var(--ease), transform var(--dur-l) var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Selection */
::selection { background: var(--color-accent); color: var(--color-surface); }