/* Header sticky + nav + footer */
.site-header {
  position: sticky; top: 0; z-index: var(--z-header);
  background: oklch(96% 0.013 95 / 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--t-fast), border-color var(--t-fast), background var(--t-fast);
}
.site-header.is-scrolled {
  background: oklch(96% 0.013 95 / 0.96);
  border-bottom-color: var(--border);
  box-shadow: 0 6px 22px -18px oklch(20% 0.020 145 / 0.4);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  min-height: var(--header-h);
  gap: var(--sp-4);
}
.brand {
  display: flex; align-items: center; gap: 0.65rem; text-decoration: none;
  color: var(--text);
}
.brand-mark {
  width: 44px; height: 44px;
  flex-shrink: 0;
}
.brand-block { display: flex; flex-direction: column; line-height: 1.05; }
.brand-name {
  font-family: var(--font-display);
  font-weight: 500; font-size: 1.18rem;
  letter-spacing: -0.012em;
}
.brand-tag {
  font-family: var(--font-ui); font-size: 0.66rem;
  text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--text-muted);
  margin-top: 0.18rem;
}

.nav-main { display: none; }
.nav-main ul { display: flex; gap: 1.4rem; list-style: none; padding: 0; margin: 0; }
.nav-main a {
  font-family: var(--font-ui); font-size: 0.92rem;
  color: var(--text-2); text-decoration: none;
  padding: 0.4rem 0; position: relative;
  transition: color var(--t-fast);
}
.nav-main a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -2px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--t-mid);
}
.nav-main a:hover::after, .nav-main a[aria-current="true"]::after { transform: scaleX(1); }
.nav-main a:hover { color: var(--accent); }

.header-cta { display: flex; align-items: center; gap: 0.6rem; }

.burger {
  width: 44px; height: 44px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); border-radius: var(--r-sm);
  background: var(--surface);
}
.burger:hover { border-color: var(--accent); }
.burger span { display: block; width: 18px; height: 1.5px; background: var(--text); position: relative; transition: transform var(--t-fast); }
.burger span::before, .burger span::after {
  content: ""; position: absolute; left: 0; right: 0; height: 1.5px; background: var(--text);
  transition: transform var(--t-fast);
}
.burger span::before { top: -6px; }
.burger span::after { top: 6px; }
.burger[aria-expanded="true"] span { transform: rotate(45deg); }
.burger[aria-expanded="true"] span::before { transform: translateY(6px) rotate(-90deg); }
.burger[aria-expanded="true"] span::after { transform: translateY(-6px) rotate(0) scaleX(0); }

/* Mobile menu plein ecran */
.mobile-menu {
  position: fixed; inset: var(--header-h) 0 0 0;
  background: oklch(96% 0.013 95 / 0.98);
  backdrop-filter: blur(10px);
  z-index: 49;
  padding: var(--sp-5);
  transform: translateY(-101%);
  transition: transform var(--t-mid);
  display: flex; flex-direction: column;
}
.mobile-menu[aria-hidden="false"] { transform: translateY(0); }
.mobile-menu ul { list-style: none; padding: 0; margin: 0; }
.mobile-menu li { border-bottom: 1px solid var(--border); }
.mobile-menu a {
  display: block; padding: 1.05rem 0;
  font-family: var(--font-display); font-size: 1.45rem;
  color: var(--text); text-decoration: none;
}
.mobile-menu a:hover { color: var(--accent); }
.mobile-menu .mobile-cta { display: flex; flex-direction: column; gap: 0.6rem; margin-top: auto; padding-top: var(--sp-5); }

/* Footer */
.site-footer {
  margin-top: var(--sp-8);
  background: var(--surface-deep);
  color: oklch(85% 0.020 100);
  padding: var(--sp-7) 0 var(--sp-5);
}
.site-footer h4 {
  font-family: var(--font-ui); font-weight: 500;
  font-size: 0.74rem; text-transform: uppercase; letter-spacing: 0.18em;
  color: var(--accent-2); margin-bottom: 1rem;
}
.site-footer a { color: oklch(88% 0.018 100); text-decoration: none; }
.site-footer a:hover { color: var(--accent-2); }
.footer-grid {
  display: grid; gap: var(--sp-5);
  grid-template-columns: 1fr;
}
.footer-brand .brand-name { color: oklch(95% 0.015 100); font-size: 1.45rem; }
.footer-brand .brand-tag { color: var(--accent-2); }
.footer-brand p { margin-top: 0.7rem; color: oklch(80% 0.020 100); }
.footer-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 0.45rem; font-size: 0.92rem; }
.footer-list svg { width: 14px; height: 14px; opacity: 0.7; flex-shrink: 0; }
.footer-list li { display: flex; align-items: flex-start; gap: 0.55rem; }
.footer-bottom {
  margin-top: var(--sp-6);
  padding-top: var(--sp-4);
  border-top: 1px solid oklch(45% 0.030 145);
  display: flex; flex-direction: column; gap: 0.7rem;
  font-size: 0.78rem; color: oklch(72% 0.020 100);
}
.footer-bottom .footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-bottom button { color: oklch(88% 0.018 100); font-family: var(--font-ui); font-size: 0.78rem; text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom button:hover { color: var(--accent-2); }

/* Section default */
section { padding: var(--sp-8) 0; }
section[id] { scroll-margin-top: 90px; }

.section-eyebrow {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--font-ui); font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.22em;
  color: var(--accent); margin-bottom: 0.85rem;
}
.section-eyebrow::before {
  content: ""; display: block; width: 28px; height: 1px; background: var(--accent);
}

.section-head { margin-bottom: var(--sp-6); max-width: 720px; }
.section-head p { color: var(--text-2); font-size: var(--fs-lg); margin-top: 0.7rem; }