/* ============================================================
   MEMTEST INDUSTRIAL — Typography
   Instrument Serif (display) + Geist (body) + JetBrains Mono (technical)
   ============================================================ */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 0.98;
  letter-spacing: -0.015em;
  color: var(--paper);
}

h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: 1.15rem; font-family: var(--font-body); font-weight: 500; letter-spacing: 0; }

p { color: var(--paper-dim); }

/* Mono used as technical voice — part numbers, specs, labels */
.mono { font-family: var(--font-mono); font-feature-settings: "ss01", "ss02"; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--copper);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
}
.eyebrow::before {
  content: "";
  width: 24px;
  height: 1px;
  background: var(--copper);
  display: inline-block;
}
.eyebrow--noline::before { display: none; }

.lead {
  font-size: var(--fs-lead);
  line-height: 1.5;
  color: var(--paper);
  font-weight: 300;
  letter-spacing: -0.005em;
}

.serif-italic { font-family: var(--font-display); font-style: italic; }

/* technical annotation */
.annotation {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-faint);
}

/* link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--paper);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--ink-line);
  transition: color var(--t-fast) var(--ease-out), border-color var(--t-fast) var(--ease-out), gap var(--t-fast) var(--ease-out);
}
.link-arrow::after { content: "→"; transition: transform var(--t-fast) var(--ease-out); }
.link-arrow:hover { color: var(--copper-bright); border-color: var(--copper); gap: 0.85em; }
.link-arrow:hover::after { transform: translateX(2px); }

/* numerals */
.numeral {
  font-family: var(--font-display);
  font-feature-settings: "lnum", "tnum";
  font-variant-numeric: lining-nums tabular-nums;
}