/* SA Software — site stylesheet
 *
 * Loaded by every page (index, contact, thank-you, 404).
 * Owns: design tokens, reset, body baseline, nav, mobile menu, footer chrome,
 *       reveal animation, skip link, focus states, grain overlay, reduced-motion.
 * Page-specific styles stay inline in each page's <style> block — when you add
 * a component used in only one place, leave it there.
 *
 * Tokens are mirrored in /brand/tokens.css (the canonical brand reference).
 * If you change a color or typeface here, change it there too.
 */

/* ─── Tokens ──────────────────────────────────────── */
:root {
  --cream:    #F5F3ED;
  --cream-d:  #EDE8DC;
  --ink:      #1E1A16;
  --ink-2:    #5C4F45;
  --ink-3:    #9C8E85;
  --rust:     #B7472A;
  --fern:     #4A7C59;
  --sky:      #2C6E8A;
  --border:   rgba(30, 26, 22, 0.09);
}

/* ─── Reset + base ────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
::selection { background: var(--rust); color: #fff; }
html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  background: var(--cream);
  color: var(--ink);
  overflow-x: hidden;
  letter-spacing: -0.01em;
}

/* ─── Accessibility: focus + skip link ────────────── */
:focus { outline: none; }
:focus-visible { outline: 2px solid var(--rust); outline-offset: 3px; border-radius: 2px; }

.skip-link {
  position: absolute; left: 12px; top: -40px;
  background: var(--ink); color: var(--cream);
  padding: 10px 16px; border-radius: 8px;
  font-size: 0.85rem; text-decoration: none;
  z-index: 10000;
  transition: top 0.18s;
}
.skip-link:focus { top: 12px; }

/* ─── Grain overlay ───────────────────────────────── */
#grain {
  position: fixed; inset: 0; z-index: 9000;
  pointer-events: none; opacity: 0.03;
  background-image: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='300' height='300'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/></filter><rect width='300' height='300' filter='url(%23n)'/></svg>");
  background-size: 180px;
}

/* ─── Nav (desktop) ───────────────────────────────── */
.sa-nav {
  position: fixed;
  top: 16px; left: 16px; right: 16px;
  z-index: 999;
  background: rgba(245, 243, 237, 0.82);
  -webkit-backdrop-filter: blur(20px);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(30, 26, 22, 0.08);
  border-radius: 22px;
  box-shadow: 0 10px 40px rgba(30, 26, 22, 0.06),
              inset 0 1px 0 rgba(255, 255, 255, 0.4);
}
.sa-nav-inner {
  max-width: 1320px; margin: 0 auto;
  height: 80px; padding: 0 28px;
  display: grid; grid-template-columns: 1fr auto 1fr;
  align-items: center;
}
.sa-nav-left { display: flex; align-items: center; }
.sa-nav-logo-link { display: flex; align-items: center; text-decoration: none; }
.sa-nav-logo-img { height: 52px; width: auto; display: block; }
.sa-nav-center { display: flex; align-items: center; gap: 36px; }
.sa-nav-center a {
  text-decoration: none; color: var(--ink-2);
  font-size: 0.88rem; font-weight: 400;
  transition: color 0.18s; position: relative;
}
.sa-nav-center a:hover { color: var(--ink); }
.sa-nav-center a::after {
  content: ''; position: absolute; bottom: -5px; left: 0;
  width: 0; height: 1px; background: var(--rust);
  transition: width 0.2s;
}
.sa-nav-center a:hover::after { width: 100%; }
.sa-nav-right { display: flex; justify-content: flex-end; align-items: center; }
.sa-nav-cta {
  background: var(--ink); color: var(--cream);
  text-decoration: none; padding: 11px 22px;
  border-radius: 999px; font-size: 0.82rem; font-weight: 500;
  transition: background 0.18s, transform 0.18s;
}
.sa-nav-cta:hover { background: var(--rust); transform: translateY(-1px); }

/* ─── Hamburger toggle ────────────────────────────── */
.sa-nav-toggle {
  display: none;
  background: transparent; border: 0; padding: 0;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  cursor: pointer; margin-left: 8px;
  position: relative; z-index: 1000;
}
.sa-nav-toggle span,
.sa-nav-toggle span::before,
.sa-nav-toggle span::after {
  display: block; width: 22px; height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s cubic-bezier(0.16,1,0.3,1), opacity 0.2s, background 0.2s;
}
.sa-nav-toggle span { position: relative; }
.sa-nav-toggle span::before, .sa-nav-toggle span::after { content: ''; position: absolute; left: 0; }
.sa-nav-toggle span::before { top: -7px; }
.sa-nav-toggle span::after  { top: 7px;  }
body.menu-open .sa-nav-toggle span { background: transparent; }
body.menu-open .sa-nav-toggle span::before { transform: translateY(7px) rotate(45deg); }
body.menu-open .sa-nav-toggle span::after  { transform: translateY(-7px) rotate(-45deg); }

/* ─── Mobile menu overlay ─────────────────────────── */
.sa-mobile-menu {
  position: fixed; inset: 0; background: var(--cream);
  z-index: 998;
  display: none; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 28px; padding: 96px 32px 64px;
  opacity: 0; transition: opacity 0.32s cubic-bezier(0.16,1,0.3,1);
}
.sa-mobile-menu.shown { display: flex; }
body.menu-open .sa-mobile-menu { opacity: 1; }
body.menu-open { overflow: hidden; }
.sa-mobile-menu a {
  font-family: 'Playfair Display', serif;
  font-size: 2.25rem; line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink); text-decoration: none;
  font-weight: 700;
}
.sa-mobile-menu a:hover { color: var(--rust); }
.sa-mobile-menu .sa-mobile-cta {
  margin-top: 20px;
  font-family: 'DM Sans', sans-serif;
  font-size: 0.95rem; font-weight: 500;
  background: var(--ink); color: var(--cream);
  padding: 14px 28px; border-radius: 999px;
}
.sa-mobile-menu-meta {
  position: absolute; bottom: 32px;
  font-family: 'DM Mono', monospace; font-size: 0.65rem;
  letter-spacing: 0.18em; color: var(--ink-3);
}

/* ─── Reveal animation ────────────────────────────── */
@keyframes up   { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }
@keyframes line { from { transform: translateY(105%); }            to { transform: translateY(0); } }

.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity 0.85s cubic-bezier(0.16,1,0.3,1),
              transform 0.85s cubic-bezier(0.16,1,0.3,1);
}
.reveal.on { opacity: 1; transform: none; }
.d1 { transition-delay: 0.12s; }
.d2 { transition-delay: 0.24s; }
.d3 { transition-delay: 0.36s; }

/* ─── Footer (shared chrome) ──────────────────────── */
.sa-footer {
  background: var(--ink); color: var(--cream);
  padding: 100px 48px 36px;
  position: relative; overflow: hidden;
}
.sa-footer-brand { max-width: 380px; }
.sa-footer-logo-img {
  height: 44px; width: auto; display: block;
  opacity: 1;
  margin-bottom: 22px;
}
.sa-footer-copy {
  color: rgba(245, 243, 237, 0.5);
  line-height: 1.85; font-weight: 300; font-size: 0.95rem;
  max-width: 38ch;
}
.sa-footer-heading {
  font-size: 0.62rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--rust);
  margin-bottom: 6px; font-family: 'DM Mono', monospace;
}
.sa-footer-col { display: flex; flex-direction: column; gap: 12px; }
.sa-footer-col a {
  color: rgba(245, 243, 237, 0.55); text-decoration: none;
  font-size: 0.92rem; transition: color 0.2s, transform 0.2s;
  display: inline-block; will-change: transform;
}
.sa-footer-col a:hover { color: var(--cream); transform: translateX(4px); }

/* ─── Responsive: nav transitions to hamburger ≤900px ─── */
@media (max-width: 900px) {
  .sa-nav {
    top: 10px; left: 10px; right: 10px;
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
  }
  .sa-nav-inner { height: 64px; padding: 0 18px; grid-template-columns: 1fr auto; }
  .sa-nav-center { display: none; }
  .sa-nav-logo-img { height: 36px; }
  .sa-nav-right .sa-nav-cta { display: none; }
  .sa-nav-toggle { display: inline-flex; }
}

/* ─── Reduced motion ──────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1 !important; transform: none !important; }
}