/* ----------------------------------------------------------------------------
   Layout : header, bottom-nav, app-main, grilles, cartes
---------------------------------------------------------------------------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--c-border);
  height: var(--header-h);
}
.app-header-inner {
  max-width: 1000px;
  height: 100%;
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.app-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--c-primary);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}
.app-brand-mark { display: inline-flex; }
.app-brand:hover { color: var(--c-primary-dark); }

.app-header-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.app-header-user .hi { font-size: 0.9rem; color: var(--c-text-soft); display: none; }
@media (min-width: 640px) {
  .app-header-user .hi { display: inline; }
}
.logout-form { display: inline-flex; margin: 0; }

.app-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 16px;
  padding-bottom: calc(var(--nav-h) + 32px);
}
.app-main.no-padding { padding: 0; }

/* ---------- Bottom navigation (mobile-first) ---------- */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid var(--c-border);
  z-index: 20;
  display: flex;
  align-items: stretch;
  justify-content: space-around;
  padding-bottom: env(safe-area-inset-bottom);
}
.bottom-nav-item {
  flex: 1;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--c-text-soft);
  background: transparent;
  border: 0;
  font-size: 0.7rem;
  font-weight: 600;
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}
.bottom-nav-item svg { color: var(--c-text-soft); }
.bottom-nav-item.is-active { color: var(--c-primary); }
.bottom-nav-item.is-active svg { color: var(--c-primary); }
.bottom-nav-item:active { transform: scale(0.95); }

/* Bouton FAB central */
.bottom-nav-fab {
  flex: 0 0 auto;
  width: 60px;
  height: 60px;
  margin: 4px 6px 0;
  border-radius: 50%;
  background: var(--c-primary);
  color: #fff !important;
  font-size: 1.4rem;
  align-self: flex-start;
  box-shadow: var(--shadow-lg);
  border: 4px solid var(--c-bg);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.bottom-nav-fab svg { color: #fff; }
.bottom-nav-fab:hover { background: var(--c-primary-dark); }