/* Header sticky + nav + menu mobile + footer */

.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h-mobile);
  display: flex;
  align-items: center;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
  z-index: var(--z-header);
}
.header.is-scrolled {
  background: color-mix(in srgb, var(--bg) 96%, transparent);
  border-bottom-color: var(--border);
}
.header__inner {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
@media (min-width: 1024px) {
  .header { height: var(--header-h); }
  .header__inner { padding: 0 32px; }
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
}
.brand-mark {
  width: 40px; height: 40px;
  display: grid;
  place-items: center;
  background: var(--accent-soft);
  border-radius: var(--r-md);
  color: var(--accent);
  flex-shrink: 0;
}
.brand-mark svg { width: 22px; height: 22px; display: block; }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-name {
  font-family: var(--ff-display);
  font-weight: 600;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
  color: var(--text);
}
.brand-tag {
  font-family: var(--ff-ui);
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin-top: 4px;
}

.nav {
  display: none;
  align-items: center;
  gap: 28px;
}
.nav a {
  font-family: var(--ff-ui);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text);
  letter-spacing: 0.01em;
  position: relative;
  text-decoration: none;
}
.nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -6px;
  height: 1px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav a:hover { color: var(--accent); }
.nav a:hover::after { transform: scaleX(1); }

.header .header__cta { display: none !important; }
@media (min-width: 1024px) {
  .nav { display: inline-flex; }
  .header .header__cta { display: inline-flex !important; }
}

/* BURGER — fixed top right (regle obligatoire) */
.burger {
  position: fixed;
  top: calc((var(--header-h-mobile) - 44px) / 2);
  right: 16px;
  width: 44px; height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--r-sm);
  z-index: var(--z-burger);
}
.burger span,
.burger span::before,
.burger span::after {
  content: "";
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease), top var(--dur) var(--ease);
  position: relative;
}
.burger span { position: relative; }
.burger span::before { position: absolute; top: -7px; left: 0; }
.burger span::after  { position: absolute; top: 7px;  left: 0; }
.burger.is-open span { background: transparent; }
.burger.is-open span::before { top: 0; transform: rotate(45deg); }
.burger.is-open span::after  { top: 0; transform: rotate(-45deg); }
@media (min-width: 1024px) {
  .burger { display: none; }
}

/* MENU MOBILE — enfant DIRECT du body (pattern obligatoire) */
.menu-mobile {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  height: 100dvh;
  background: var(--bg);
  z-index: var(--z-menu);
  padding: calc(var(--header-h-mobile) + 24px) 24px 40px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  transform: translateY(-100%);
  opacity: 0;
  visibility: hidden;
  transition: transform .35s ease, opacity .35s ease, visibility 0s linear .35s;
}
.menu-mobile.is-open {
  transform: translateY(0);
  opacity: 1;
  visibility: visible;
  transition: transform .35s ease, opacity .35s ease;
}
.menu-mobile > a:not(.btn) {
  font-family: var(--ff-display);
  font-size: 1.55rem;
  color: var(--text);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 1px solid var(--border);
}
.menu-mobile > a:not(.btn):last-of-type { border-bottom: none; }
.menu-mobile .menu-cta {
  display: flex; flex-direction: column; gap: 10px;
  margin-top: 16px;
}
.menu-mobile .menu-cta .btn { width: 100%; }
.menu-mobile .menu-meta {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  font-size: 0.88rem;
  color: var(--text-2);
}
@media (min-width: 1024px) {
  .menu-mobile { display: none; }
  .burger { display: none; }
}

/* FAB Appeler — bouton flottant mobile */
.fab {
  position: fixed;
  right: 16px;
  bottom: 16px;
  z-index: var(--z-fab);
  background: var(--accent);
  color: var(--bg);
  border-radius: 999px;
  padding: 12px 18px;
  font-family: var(--ff-ui);
  font-weight: 600;
  font-size: 0.92rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  box-shadow: 0 10px 28px rgba(35, 38, 46, 0.22);
  text-decoration: none;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  pointer-events: none;
}
.fab.is-visible {
  opacity: 1; transform: none; pointer-events: auto;
}
.fab svg { width: 18px; height: 18px; }
@media (min-width: 1024px) { .fab { display: none; } }

/* Footer */
.site-footer {
  background: var(--text);
  color: var(--text-on-dark);
  padding: 56px 0 24px;
  margin-top: 0;
}
.site-footer a { color: var(--text-on-dark); text-decoration: none; }
.site-footer a:hover { color: var(--accent-on-dark); }
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
.footer-col h4 {
  font-family: var(--ff-display);
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--accent-on-dark);
  margin-bottom: 14px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col .footer-text { color: var(--text-on-dark-2); font-size: 0.92rem; line-height: 1.6; }
.footer-brand { display: flex; align-items: center; gap: 12px; }
.footer-brand .brand-name { color: var(--text-on-dark); }
.footer-brand .brand-mark { background: rgba(242, 241, 238, 0.10); color: var(--accent-on-dark); }
.footer-brand .brand-tag { color: var(--accent-on-dark); }
.footer-bottom {
  margin-top: 40px;
  padding-top: 18px;
  border-top: 1px solid rgba(242, 241, 238, 0.14);
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px;
  font-size: 0.82rem;
  color: var(--text-on-dark-2);
}
.footer-bottom button { color: var(--text-on-dark); text-decoration: underline; text-underline-offset: 3px; }
.footer-bottom button:hover { color: var(--accent); }
@media (min-width: 768px) {
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px; }
}