/* UX1 - Shell responsive e navigazione principale */
.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 10000;
  transform: translateY(-160%);
  min-height: var(--ui-touch-target, 44px);
  display: inline-flex;
  align-items: center;
  padding: 10px 14px;
  border-radius: var(--ui-radius-md, 12px);
  background: var(--ui-brand, #0f62fe);
  color: #fff;
  font-weight: 800;
  box-shadow: var(--ui-shadow-md, 0 8px 24px rgba(15,34,56,.12));
  transition: transform .16s ease;
}
.skip-link:focus { transform: translateY(0); color: #fff; }

.shell-brand { min-width: 0; }
.shell-brand h1, .shell-brand p { overflow-wrap: anywhere; }
.shell-actions { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; justify-content: flex-end; }
.shell-user-copy { color: #e9f2ff; font-weight: 700; }
.shell-actions .nav-toggle,
button.nav-toggle,
.nav-toggle.btn { display: none !important; }
.mobile-logout-form { display: none; }

.usolar-main-nav {
  position: sticky;
  top: 0;
  z-index: 30;
  box-shadow: 0 1px 0 rgba(15, 34, 56, .04);
}
.main-nav-link[aria-current="page"],
.main-nav-dropdown-toggle[aria-current="page"] { background: var(--ui-brand, #0f62fe); color: #fff; }
.main-nav-link[aria-current="page"]:hover,
.main-nav-dropdown-toggle[aria-current="page"]:hover { background: var(--ui-brand-hover, #004bd6); color: #fff; }
.main-nav-dropdown { position: relative; }
.main-nav-dropdown-panel { min-width: 230px; padding: 8px; border: 1px solid var(--ui-border, #d7e0ec); border-radius: var(--ui-radius-lg, 16px); background: var(--ui-surface, #fff); box-shadow: var(--ui-shadow-md, 0 8px 24px rgba(15,34,56,.10)); }
.main-nav-dropdown-panel a { display: flex; align-items: center; min-height: 40px; border-radius: var(--ui-radius-md, 12px); padding: 9px 12px; color: var(--ui-text, #17263a); }
.main-nav-dropdown-panel a:hover,
.main-nav-dropdown-panel a:focus-visible { background: var(--ui-brand-soft, #eaf2ff); color: var(--ui-text, #17263a); }

@media (max-width: 980px) {
  .topbar { align-items: stretch; }
  .shell-actions { width: 100%; justify-content: space-between; }
}

@media (max-width: 900px) {
  .topbar { gap: 14px; }
  .shell-actions { align-items: stretch; }
  .shell-user-copy { width: 100%; }
  .shell-actions .nav-toggle,
  button.nav-toggle,
  .nav-toggle.btn { display: inline-flex !important; }
  .topbar .p25b3-logout-form { display: none; }
  .usolar-main-nav { position: static; display: none !important; margin: 0; padding: 10px 12px 96px; border-bottom: 1px solid var(--ui-border, #d7e0ec); background: rgba(255,255,255,.98); box-shadow: var(--ui-shadow-sm, 0 1px 2px rgba(15,34,56,.06)); overflow: visible; flex-wrap: wrap; scroll-snap-type: none; max-height: min(70vh, 560px); overflow-y: auto; -webkit-overflow-scrolling: touch; }
  body.nav-open .usolar-main-nav { display: flex !important; }
  .usolar-main-nav .main-nav-link,
  .usolar-main-nav .main-nav-dropdown,
  .usolar-main-nav .main-nav-dropdown-toggle,
  .usolar-main-nav .mobile-logout-form { width: 100%; }
  .usolar-main-nav .main-nav-link,
  .usolar-main-nav .main-nav-dropdown-toggle { justify-content: flex-start; border-radius: var(--ui-radius-md, 12px); }
  .main-nav-dropdown-panel { position: static; width: 100%; margin-top: 6px; box-shadow: none; border-radius: var(--ui-radius-md, 12px); }
  body.nav-open .topbar .p25b3-logout-form { display: block; position: fixed; left: 12px; right: 12px; bottom: 12px; z-index: 70; padding: 10px; border: 1px solid #f3b9b4; border-radius: var(--ui-radius-lg, 16px); background: rgba(255,255,255,.96); box-shadow: 0 14px 34px rgba(15,34,56,.18); }
  body.nav-open .topbar .p25b3-logout-form .btn { width: 100%; background: var(--ui-surface, #fff); color: var(--ui-danger, #b42318); border-color: #f3b9b4; }
  .mobile-logout-form { display: none; }
}

@media (max-width: 440px) { .shell-actions .btn { width: 100%; } }
@media (prefers-reduced-motion: reduce) { .skip-link { transition: none; } }