/* Pett — shared design tokens (mirrors DESIGN.md) */
:root {
  --forest: #0A3326; --forest-deep: #072319; --sunbeam: #FFCD53; --cream: #F7F5F1; --charcoal: #1E1E1C;
  --sage: #4C7A63; --mint: #E6F2EA; --offwhite: #FAFBF7;
  --text: var(--charcoal); --text-2: #5B625E; --text-inverse: #FFFFFF; --border: #E3E5E0;
  --success: #2E7D50; --warning: #B26A00;
  --r-md: 12px; --r-lg: 16px; --r-xl: 20px; --r-photo: 24px; --r-hero: 28px; --r-pill: 999px;
  --shadow-card: 0 4px 8px rgba(0,0,0,.10);
  --shadow-screen: 0 24px 60px -20px rgba(10,51,38,.35), 0 8px 20px -8px rgba(0,0,0,.18);
  --font-brand: "Nunito", "PT Sans", -apple-system, system-ui, sans-serif;
  --font-body: "PT Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --wrap: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body { margin: 0; background: var(--offwhite); color: var(--text); font: 17px/1.6 var(--font-body); -webkit-text-size-adjust: 100%; -webkit-font-smoothing: antialiased; }
a { color: var(--forest); }
img { max-width: 100%; height: auto; display: block; }
.wrap { max-width: var(--wrap); margin: 0 auto; padding-left: 20px; padding-right: 20px; }
@media (max-width: 640px) { .wrap { padding-left: 16px; padding-right: 16px; } }

.nav-bar { position: sticky; top: 0; z-index: 50; background: rgba(250,251,247,.94);
  backdrop-filter: saturate(160%) blur(14px); -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-bottom: 1px solid rgba(30,30,28,.06); transition: background .25s ease, border-color .25s ease; }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 16px; max-width: var(--wrap); margin: 0 auto; padding: 10px 20px; }
.nav-logo { display: block; line-height: 0; }
.nav-logo img { width: 72px; height: auto; }
.nav-logo .logo-light { display: none; }
.nav-links { display: flex; gap: 22px; font-weight: 700; font-size: 15px; }
.nav-links a { color: var(--text-2); text-decoration: none; transition: color .2s; }
.nav-links a:hover { color: var(--forest); }
.btn-nav { background: var(--forest); color: #fff; }
.btn-nav:hover { background: #0E4533; }
.nav-bar.on-dark { background: rgba(10,51,38,.88); border-bottom-color: rgba(255,255,255,.08); }
.nav-bar.on-dark .logo-dark { display: none; } .nav-bar.on-dark .logo-light { display: block; }
.nav-bar.on-dark .nav-links a { color: rgba(255,255,255,.78); } .nav-bar.on-dark .nav-links a:hover { color: #fff; }
.nav-bar.on-dark .btn-nav { background: #fff; color: var(--forest); } .nav-bar.on-dark .btn-nav:hover { background: var(--cream); }
@media (max-width: 640px) { .nav-links { display: none; } .nav-logo img { width: 60px; } .nav { padding: 8px 16px; } }

.btn { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font: 700 16px/1 var(--font-body); border-radius: var(--r-lg); padding: 14px 22px;
  transition: transform .15s ease, background .15s ease; will-change: transform; }
.btn:hover { transform: translateY(-1px); } .btn:active { transform: translateY(0); }
.btn-sm { padding: 10px 16px; font-size: 15px; border-radius: var(--r-md); }
.btn-primary { background: var(--forest); color: #fff; } .btn-primary:hover { background: #0E4533; }
.btn-light { background: #fff; color: var(--forest); box-shadow: 0 1px 0 rgba(0,0,0,.06); } .btn-light:hover { background: var(--cream); }
.btn-outline { background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.35); } .btn-outline:hover { border-color: rgba(255,255,255,.7); }
.btn .apple { width: 18px; height: 18px; fill: currentColor; }

.prose { padding-top: 40px; padding-bottom: 72px; max-width: 46rem; }
.prose h1 { font: 800 clamp(2rem, 5vw, 2.6rem)/1.15 var(--font-brand); letter-spacing: -.01em; margin: 0 0 .4rem; }
.prose h2 { font: 700 1.35rem/1.25 var(--font-body); margin: 2.4rem 0 .6rem; }
.prose h3 { font: 700 1.05rem/1.3 var(--font-body); margin: 1.6rem 0 .3rem; }
.prose .lede { color: var(--text-2); font-size: 1.1rem; margin-top: 0; }
.prose .date { color: var(--text-2); font-size: .92rem; }
.prose .callout { background: var(--mint); border-radius: var(--r-xl); padding: 16px 20px; margin: 1.5rem 0; }
.prose .callout p { margin: 0; }
.prose ul { padding-left: 1.2rem; } .prose li { margin: .35rem 0; }
.prose code { background: var(--cream); padding: .1rem .35rem; border-radius: 6px; font-size: .9em; }

.site-footer { border-top: 1px solid var(--border); background: var(--cream); }
.footer-inner { padding-top: 40px; padding-bottom: 44px; display: grid; gap: 12px; }
.footer-inner img { width: 72px; }
.footer-inner p { margin: 0; color: var(--text-2); }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; font-weight: 700; } .footer-links a { text-decoration: none; }
.footer-fine { font-size: .9rem; }