/* Eleven Royal Terrace — base resets + typographic primitives
   These classes are the foundation vocabulary every component builds on:
   eyebrows, display headlines, section titles, ledes, body copy, ui labels,
   hairline rules and the brass diamond ornament. */

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--surface-page);
  color: var(--text-primary);
  font-family: var(--font-display);
  font-weight: var(--weight-regular);
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
body { overflow-x: hidden; }
img { max-width: 100%; display: block; }

/* ---- Eyebrow — small tracked label above a heading ---- */
.eyebrow {
  font-family: var(--font-ui);
  font-weight: var(--weight-regular);
  font-size: var(--text-eyebrow);
  letter-spacing: var(--tracking-super);
  text-transform: uppercase;
  color: var(--text-accent);
}
.eyebrow.on-dark { color: var(--text-accent-on-dark); }

/* ---- Display — the largest headline treatment (hero) ---- */
.display {
  font-family: var(--font-display);
  font-weight: var(--weight-light);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  font-size: var(--text-display);
}
.display em { font-style: italic; font-weight: var(--weight-light); color: var(--text-accent); }

/* ---- Section title — used at the head of every chapter ---- */
.section-title {
  font-family: var(--font-display);
  font-weight: var(--weight-light);
  font-size: var(--text-section-title);
  line-height: 1.02;
  letter-spacing: var(--tracking-tight);
  margin: 0 0 0.4em;
}
.section-title em { font-style: italic; color: var(--text-accent); }

/* ---- Lede — intro paragraph under a section title ---- */
.lede {
  font-family: var(--font-display);
  font-weight: var(--weight-regular);
  font-size: var(--text-lede);
  line-height: var(--leading-lede);
  color: var(--text-primary);
  max-width: 38ch;
}

/* ---- Body copy ---- */
p.body {
  font-family: var(--font-display);
  font-size: var(--text-body);
  line-height: var(--leading-body);
  color: var(--text-primary);
  margin: 0 0 1em;
  text-wrap: pretty;
}

/* ---- UI label family — nav, buttons, meta, always tracked wide ---- */
.ui {
  font-family: var(--font-ui);
  font-weight: var(--weight-regular);
  font-size: var(--text-ui);
  letter-spacing: var(--tracking-wide);
}
.ui-small {
  font-family: var(--font-ui);
  font-size: var(--text-ui-small);
  letter-spacing: var(--tracking-label);
  text-transform: uppercase;
}

/* ---- Hairlines ---- */
.rule { height: 1px; background: var(--line-default); border: 0; margin: 0; }
.rule-brass { height: 1px; background: var(--accent-primary); opacity: 0.6; border: 0; }

/* ---- Ornament — short rule / diamond / short rule, brand's only "glyph" ---- */
.ornament {
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--accent-primary);
}
.ornament::before,
.ornament::after {
  content: "";
  height: 1px;
  width: 44px;
  background: currentColor;
  opacity: 0.6;
}
.ornament .glyph {
  width: 6px; height: 6px;
  transform: rotate(45deg);
  background: currentColor;
}
.ornament.center { justify-content: center; }

/* ---- Layout utilities ---- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--gutter);
}
.flex { display: flex; }
.col { flex-direction: column; }
.center { align-items: center; justify-content: center; }
.gap-sm { gap: 12px; }
.gap-md { gap: 24px; }
.gap-lg { gap: 48px; }

/* ---- Reveal-on-scroll (IntersectionObserver adds .in) ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--duration-reveal) var(--ease-standard), transform var(--duration-reveal) var(--ease-standard);
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal-stagger > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 900ms var(--ease-standard), transform 900ms var(--ease-standard);
}
.reveal-stagger.in > * { opacity: 1; transform: translateY(0); }
.reveal-stagger.in > *:nth-child(2) { transition-delay: 120ms; }
.reveal-stagger.in > *:nth-child(3) { transition-delay: 240ms; }
.reveal-stagger.in > *:nth-child(4) { transition-delay: 360ms; }
.reveal-stagger.in > *:nth-child(5) { transition-delay: 480ms; }
.reveal-stagger.in > *:nth-child(6) { transition-delay: 600ms; }