/* Animal Health Experts — shared brand stylesheet */

@import url('https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,400;9..144,500;9..144,600&family=Inter:wght@400;500;600;700&display=swap');

:root {
  --navy: oklch(0.27 0.05 250);
  --navy-deep: oklch(0.215 0.045 252);
  --slate: oklch(0.345 0.055 251);
  --blue: oklch(0.55 0.12 252);
  --blue-soft: oklch(0.64 0.10 252);
  --brass: oklch(0.71 0.075 75);
  --brass-soft: oklch(0.80 0.06 80);
  --parchment: oklch(0.965 0.012 85);
  --stone: oklch(0.925 0.014 84);
  --stone-deep: oklch(0.885 0.016 83);
  --ink: oklch(0.25 0.025 255);
  --muted: oklch(0.505 0.022 255);
  --line: oklch(0.86 0.012 85);
  --cream: oklch(0.97 0.01 85);
  --cream-dim: oklch(0.82 0.018 250);

  --font-display: 'Fraunces', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', system-ui, -apple-system, sans-serif;

  --maxw: 1180px;
  --gutter: clamp(1.25rem, 4vw, 3.5rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.97rem + 0.18vw, 1.075rem);
  line-height: 1.65;
  color: var(--ink);
  background: var(--parchment);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--navy);
  margin: 0;
}

p { margin: 0 0 1rem; max-width: 68ch; }

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--navy); }

img, svg, video { display: block; max-width: 100%; }

::selection { background: var(--brass-soft); color: var(--navy-deep); }

:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; border-radius: 2px; }

.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }

.eyebrow {
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--brass);
  margin: 0 0 1rem;
}
.eyebrow.on-dark { color: var(--brass-soft); }

.lede {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 1.1rem + 1.1vw, 1.75rem);
  line-height: 1.4;
  font-weight: 400;
  color: var(--slate);
  letter-spacing: -0.01em;
}

/* ---- buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  padding: 0.85em 1.5em;
  border-radius: 2px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.4s var(--ease), background-color 0.3s var(--ease), color 0.3s var(--ease), border-color 0.3s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--navy); color: var(--cream); }
.btn-primary:hover { background: var(--navy-deep); color: var(--cream); }
.btn-ghost { background: transparent; color: var(--navy); border-color: oklch(0.27 0.05 250 / 0.35); }
.btn-ghost:hover { background: var(--navy); color: var(--cream); border-color: var(--navy); }
.btn-on-dark { background: var(--cream); color: var(--navy-deep); }
.btn-on-dark:hover { background: var(--brass-soft); color: var(--navy-deep); }
.btn-ghost-dark { background: transparent; color: var(--cream); border-color: oklch(0.97 0.01 85 / 0.35); }
.btn-ghost-dark:hover { background: var(--cream); color: var(--navy-deep); border-color: var(--cream); }

.arrow { transition: transform 0.4s var(--ease); }
.btn:hover .arrow, a:hover .arrow { transform: translateX(3px); }

/* ---- nav ---- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: oklch(0.965 0.012 85 / 0.82);
  backdrop-filter: saturate(1.2) blur(12px);
  -webkit-backdrop-filter: saturate(1.2) blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { max-width: var(--maxw); margin: 0 auto; padding: 0.85rem var(--gutter);
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; }
.brand img { width: 40px; height: 40px; }
.brand-name { font-family: var(--font-display); font-weight: 600; font-size: 1.02rem; color: var(--navy); letter-spacing: -0.01em; line-height: 1; }
.brand-name span { display: block; font-family: var(--font-sans); font-size: 0.62rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--brass); margin-top: 3px; }
.nav-links { display: flex; align-items: center; gap: 1.6rem; }
.nav-links a {
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase;
  color: var(--slate);
}
.nav-links a:hover { color: var(--navy); }
.nav-links a.btn { padding: 0.6em 1.15em; font-size: 0.78rem; text-transform: none; letter-spacing: 0.04em; }
.nav-links a.btn-primary, .nav-links a.btn-primary:hover { color: var(--cream); }
.nav-toggle { display: none; }

/* ---- sections ---- */
section { padding-block: clamp(4rem, 3rem + 6vw, 8rem); }
.section-dark { background: var(--navy); color: var(--cream); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: var(--cream); }
.section-deep { background: var(--navy-deep); color: var(--cream); }
.section-deep h1, .section-deep h2, .section-deep h3 { color: var(--cream); }
.section-stone { background: var(--stone); }
.muted-dark { color: var(--cream-dim); }

/* ---- footer ---- */
.footer { background: var(--navy-deep); color: var(--cream-dim); padding-block: 3.5rem 2.5rem; }
.footer .wrap { display: flex; flex-wrap: wrap; gap: 2rem 3rem; justify-content: space-between; align-items: flex-start; }
.footer .brand-name { color: var(--cream); }
.footer a { color: var(--cream-dim); }
.footer a:hover { color: var(--cream); }
.footer-nav { display: flex; gap: 1.5rem; flex-wrap: wrap; font-size: 0.85rem; }
.footer-base { max-width: var(--maxw); margin: 2.5rem auto 0; padding: 1.5rem var(--gutter) 0; border-top: 1px solid oklch(0.97 0.01 85 / 0.12);
  display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; justify-content: space-between; font-size: 0.78rem; color: oklch(0.82 0.018 250 / 0.7); }
.footer-base a { color: oklch(0.82 0.018 250 / 0.9); }

/* ---- reveal motion ---- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.9s var(--ease), transform 0.9s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
  .btn:hover { transform: none; }
}

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

@media (max-width: 760px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; position: absolute; top: 100%; left: 0; right: 0; flex-direction: column; align-items: flex-start; gap: 1.1rem; background: var(--parchment); padding: 1.5rem var(--gutter); border-bottom: 1px solid var(--line); }
  .nav-toggle { display: inline-flex; background: none; border: 0; color: var(--navy); cursor: pointer; padding: 4px; }
}