/* ============================================================
   VALENCE PARTNERS — base.css
   Design tokens, reset, typography, layout primitives, buttons
   ============================================================ */

:root {
  /* Colour system */
  --navy:        #0F1F3D;
  --navy-deep:   #0A1528;
  --navy-mid:    #1B3060;
  --gold:        #C4973A;
  --gold-light:  #E8C370;
  --gold-text:   #8A6A22; /* a11y: gold that meets 4.5:1 on light backgrounds */
  --cream:       #F9F6F0;
  --white:       #FFFFFF;
  --text:        #2A2A2A;
  --text-light:  #6B7280;
  --border:      rgba(196,151,58,0.25);
  --line:        rgba(15,31,61,0.10);

  /* Typography */
  --serif: 'Cormorant Garamond', Georgia, serif;
  --sans:  'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing scale */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 7rem;

  /* Layout */
  --container: 1200px;
  --container-narrow: 920px;
  --nav-h: 76px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ───────────────────────────────────────────── */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--sans);
  font-weight: 400;
  background: var(--cream);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ── Typography ──────────────────────────────────────── */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  line-height: 1.12;
  color: var(--navy);
  letter-spacing: -0.01em;
}

.display {
  font-size: clamp(2.6rem, 6vw, 5rem);
  font-weight: 300;
  line-height: 1.06;
}
.display em, h1 em, h2 em, h3 em {
  font-style: italic;
  color: var(--gold);
}

.h2 { font-size: clamp(2rem, 4vw, 3.1rem); }
.h3 { font-size: clamp(1.4rem, 2.5vw, 2rem); }

.lead {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
  color: var(--text-light);
  font-weight: 300;
}

p { line-height: 1.75; }

/* Eyebrow / section tag */
.eyebrow {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.2rem;
}

/* ── Layout ──────────────────────────────────────────── */
.container { max-width: var(--container); margin: 0 auto; padding: 0 5%; }
.container.narrow { max-width: var(--container-narrow); }

section { padding: var(--space-xl) 5%; }
.section-inner { max-width: var(--container); margin: 0 auto; }
.section-inner.narrow { max-width: var(--container-narrow); }

.section-head { max-width: 720px; margin-bottom: var(--space-lg); }
.section-head .lead { margin-top: 1rem; }

/* Section background variants */
.bg-navy  { background: var(--navy); color: rgba(255,255,255,0.7); }
.bg-navy h1, .bg-navy h2, .bg-navy h3 { color: var(--white); }
.bg-navy .lead { color: rgba(255,255,255,0.6); }
.bg-cream { background: var(--cream); }
.bg-white { background: var(--white); }

/* ── Buttons ─────────────────────────────────────────── */
.btn {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.95rem 2rem;
  transition: all 0.25s var(--ease);
  border: 1.5px solid transparent;
  cursor: pointer;
  text-align: center;
}
.btn-primary {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}
.btn-primary:hover { background: transparent; color: var(--gold); }

.btn-outline {
  background: transparent;
  color: var(--navy);
  border-color: rgba(15,31,61,0.25);
}
.btn-outline:hover { border-color: var(--gold); color: var(--gold); }

.bg-navy .btn-outline,
.hero .btn-outline {
  color: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.25);
}
.bg-navy .btn-outline:hover,
.hero .btn-outline:hover { border-color: var(--gold); color: var(--gold-light); }

.btn-group { display: flex; gap: 1rem; flex-wrap: wrap; }

/* Text link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--gold);
  transition: gap 0.2s var(--ease);
}
.link-arrow::after { content: '→'; transition: transform 0.2s var(--ease); }
.link-arrow:hover { gap: 0.7rem; }

/* ── Utilities ───────────────────────────────────────── */
.divider { height: 1px; background: var(--line); border: 0; }
.bg-navy .divider { background: rgba(196,151,58,0.2); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }

/* Reveal on scroll */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  [data-reveal] { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ============================================================
   ACCESSIBILITY (WCAG 2.2)
   ============================================================ */

/* Visually-hidden but screen-reader available */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* Skip link — visible on focus */
.skip-link {
  position: absolute; left: 1rem; top: -60px; z-index: 2000;
  background: var(--gold); color: var(--navy);
  padding: 0.7rem 1.2rem; font-weight: 600; font-size: 0.85rem;
  letter-spacing: 0.04em; text-transform: uppercase;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 1rem; outline: 3px solid var(--navy); outline-offset: 2px; }

/* Visible focus indicator for keyboard users (SC 2.4.11 / 2.4.13) */
*:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
  border-radius: 2px;
}
/* On navy backgrounds use the lighter gold for focus contrast */
.bg-navy *:focus-visible, .hero *:focus-visible, .nav *:focus-visible {
  outline-color: var(--gold-light);
}
/* Don't show the ring on mouse click, only keyboard */
*:focus:not(:focus-visible) { outline: none; }

/* Target where the skip link lands */
[tabindex="-1"]:focus { outline: none; }

/* ── Contrast fixes: gold text on LIGHT backgrounds ──── */
/* Small gold text needs 4.5:1 → use darker --gold-text */
.eyebrow { color: var(--gold-text); }
h1 em, h2 em, h3 em, .display em, .h2 em, .h3 em { color: var(--gold-text); }

/* On dark backgrounds, the lighter gold has strong contrast — restore it */
.hero .eyebrow,
.bg-navy .eyebrow,
.hero h1 em, .hero .display em,
.bg-navy h1 em, .bg-navy h2 em, .bg-navy h3 em, .bg-navy .h2 em, .bg-navy .h3 em {
  color: var(--gold-light);
}