/* ============================================================
   Site chrome — shared header + cactus footer
   Self-contained (own palette vars, no global element rules) so it can
   be dropped onto the richly-styled case-study pages without collisions.
   ============================================================ */
.site-head,
.site-footer {
  --c-fg: #10100f;
  --c-bg: #ffffff;
  --c-accent: #c75d34;
  --c-line: color-mix(in oklab, #10100f 14%, #ffffff);
  --c-line-strong: color-mix(in oklab, #10100f 26%, #ffffff);
  --c-muted: color-mix(in oklab, #10100f 52%, #ffffff);
  --c-ease: cubic-bezier(0.22, 1, 0.36, 1);
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  box-sizing: border-box;
}
.site-head *, .site-footer * { box-sizing: border-box; }

/* ---------------- Header ---------------- */
.site-head {
  position: relative;
  z-index: 100;
  background: color-mix(in oklab, var(--c-bg) 82%, transparent);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--c-line);
}
.site-head .wrap {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(20px, 6vw, 96px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}
.site-head .brand {
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  font-stretch: 125%;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  text-decoration: none;
  transition: color 0.25s var(--c-ease);
}
.site-head .brand:hover { color: var(--c-accent); }
.site-head .brand b { font-weight: inherit; }
.site-head .nav {
  display: flex;
  gap: clamp(18px, 3vw, 40px);
  align-items: center;
}
.site-head .nav a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--c-muted);
  text-decoration: none;
  position: relative;
  transition: color 0.2s var(--c-ease);
}
.site-head .nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 1px;
  background: var(--c-fg);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--c-ease);
}
.site-head .nav a:hover { color: var(--c-fg); }
.site-head .nav a:hover::after { transform: scaleX(1); }
.site-head .nav a.cta {
  transition: color 0.2s var(--c-ease);
}
.site-head .nav a.cta:hover { color: var(--c-fg); }

/* ---------------- Footer ---------------- */
.site-footer {
  position: relative;
  background: var(--c-bg);
  margin-top: 0;
  padding-top: clamp(56px, 7vw, 96px);
  overflow: hidden;
  isolation: isolate;
  color: var(--c-fg);
}
.site-footer .footer-inner {
  width: min(1240px, 100% - clamp(40px, 8vw, 140px));
  margin: 0 auto;
  padding-bottom: clamp(56px, 8vw, 96px);
}
.site-footer .footer-top {
  display: block;
}
.site-footer .wordmark {
  font-family: "Plus Jakarta Sans", system-ui, sans-serif;
  font-stretch: 125%;
  font-weight: 700;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--c-accent);
  text-decoration: none;
  display: inline-block;
}
.site-footer .tagline {
  margin: clamp(16px, 2.4vw, 26px) 0 0;
  max-width: 32ch;
  font-size: clamp(15px, 1.4vw, 17px);
  line-height: 1.55;
  color: var(--c-muted);
}
.site-footer .footer-nav {
  display: flex;
  flex-direction: column;
  gap: clamp(16px, 2.4vw, 24px);
}
.site-footer .nav-row {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 3vw, 40px);
}
.site-footer .nav-row a {
  color: var(--c-fg);
  text-decoration: none;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 500;
  position: relative;
  width: max-content;
  transition: color 0.25s var(--c-ease);
}
.site-footer .nav-row a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -3px;
  width: 100%; height: 1.5px;
  background: var(--c-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.32s var(--c-ease);
}
.site-footer .nav-row a:hover { color: var(--c-accent); }
.site-footer .nav-row a:hover::after { transform: scaleX(1); }
.site-footer .nav-row a.nav-push { margin-left: auto; }
.site-footer .footer-base { display: none; }
.site-footer .to-top {
  appearance: none; border: none; background: none; cursor: pointer;
  font: inherit; color: var(--c-fg); font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase; font-size: 11px;
  display: inline-flex; align-items: center; gap: 9px;
  padding: 8px 0;
  font-family: "Playfair Display", system-ui, sans-serif;
}
.site-footer .to-top .arrow {
  display: inline-grid; place-items: center;
  width: 30px; height: 30px; border-radius: 50%;
  border: 1.5px solid var(--c-line-strong);
  transition: transform 0.3s var(--c-ease), border-color 0.3s var(--c-ease), background 0.3s var(--c-ease), color 0.3s var(--c-ease);
}
.site-footer .to-top:hover .arrow {
  transform: translateY(-3px);
  border-color: var(--c-accent);
  background: var(--c-accent);
  color: var(--c-bg);
}

/* ---------------- Footer nav row: links / social centered / back-to-top right ---------------- */
.site-footer .nav-row { align-items: center; }
.site-footer .nav-row .nav-links { display: flex; flex-wrap: wrap; gap: clamp(20px, 3vw, 40px); }
.site-footer .nav-row .nav-social { display: flex; gap: clamp(20px, 3vw, 40px); margin: 0 auto; }
.site-footer .nav-row .to-top {
  margin-left: 0;
  font-family: inherit;
  text-transform: none;
  letter-spacing: normal;
  font-size: clamp(15px, 1.5vw, 17px);
  font-weight: 500;
  color: var(--c-fg);
}
.site-footer .nav-row .to-top .arrow {
  border: none;
  width: auto; height: auto;
  border-radius: 0;
  font-size: 1.1em;
}
.site-footer .nav-row .to-top:hover .arrow {
  background: none;
  color: var(--c-accent);
}

/* hand-drawn saguaro skyline — recolorable ink mask */
.site-footer .desert {
  position: relative;
  width: 100%;
  aspect-ratio: 3641 / 650;
  background-color: var(--c-fg);
  -webkit-mask: url("../assets/desert-horizon.png") no-repeat center bottom / 100% 100%;
  mask: url("../assets/desert-horizon.png") no-repeat center bottom / 100% 100%;
}

@media (max-width: 760px) {
  .site-footer .footer-top { grid-template-columns: 1fr; gap: 40px; }
  .site-footer .footer-nav { max-width: 420px; }
}
@media (max-width: 600px) {
  .site-head .nav { gap: 16px; }
  .site-head .nav .hide-sm { display: none; }
  .site-head .wrap { flex-wrap: wrap; row-gap: 10px; padding-block: 14px; height: auto; }
  .site-head .brand { font-size: 0.9rem; white-space: normal; flex: 1 1 100%; }
  .site-head .nav { flex: 1 1 100%; }
}
@media (max-width: 440px) {
  .site-footer .footer-nav { grid-template-columns: 1fr 1fr; gap: 28px; }
  .site-footer .footer-base { justify-content: flex-start; }
}