/* =========================
   header.css
   - solo header + menu mobile + theme toggle + dropdown
   ========================= */

/* Sticky header + on-scroll */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  isolation: isolate;

  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--header-border);

  transition:
    background-color 240ms ease,
    border-color 240ms ease,
    box-shadow 240ms ease,
    backdrop-filter 240ms ease;
}

.site-header.is-scrolled {
  background: var(--header-bg-scrolled);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--header-border-scrolled);
  box-shadow: 0 12px 30px rgba(2, 6, 23, 0.08);
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;

  padding: 16px 0;
  transition: padding 240ms ease;
}

.site-header.is-scrolled .header {
  padding: 10px 0;
}

.header__right {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

/* Brand */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
  font-weight: 800;
  letter-spacing: -0.02em;
}

/* Nav links */
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: flex-end;
}

.nav a {
  text-decoration: none;
  color: var(--muted);
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
}

.nav a:hover {
  color: var(--text);
  border-color: var(--border);
  background: var(--hover-bg);
}

.nav a.is-active {
  color: var(--primary);
  background: rgba(29, 78, 216, 0.08);
  border-color: rgba(29, 78, 216, 0.18);
}

.nav a:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

/* =========================
   Desktop dropdown “Strumenti”
   - apre su hover/focus-within del wrapper
   - pinned via .is-open (JS)
   - FIX: hover bridge
   - FIX: no-hover (su hashchange) disabilita apertura in hover per 200ms
   ========================= */

.nav-dropdown {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.nav-dropdown__trigger {
  appearance: none;
  background: transparent;
  border: 1px solid transparent;
  color: var(--muted);
  font: inherit;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 12px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.nav-dropdown__trigger:hover {
  color: var(--text);
  border-color: var(--border);
  background: var(--hover-bg);
}

.nav-dropdown__trigger:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

.nav-dropdown__trigger.is-active {
  color: var(--primary);
  background: rgba(29, 78, 216, 0.08);
  border-color: rgba(29, 78, 216, 0.18);
}

.nav-dropdown__chevron {
  width: 16px;
  height: 16px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.9;
  transition: transform 180ms ease;
}

/* CLOSED */
.nav-dropdown__menu {
  position: absolute;
  right: 0;
  top: calc(100% + 10px);
  min-width: 320px;

  border-radius: 16px;
  border: 1px solid var(--border);
  background: var(--menu-bg);
  backdrop-filter: blur(12px);
  box-shadow: 0 18px 45px rgba(2, 6, 23, 0.14);

  padding: 10px;
  display: grid;
  gap: 6px;

  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;

  transition: opacity 200ms ease, transform 200ms ease, background-color 220ms ease, border-color 220ms ease;
  z-index: 20;
}

/* Hover bridge */
.nav-dropdown__menu::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -12px;
  height: 12px;
  background: transparent;
}

/* OPEN: hover OR focus-within OR pinned */
.nav-dropdown:hover .nav-dropdown__menu,
.nav-dropdown:focus-within .nav-dropdown__menu,
.nav-dropdown.is-open .nav-dropdown__menu {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/* Chevron rotate when open */
.nav-dropdown:hover .nav-dropdown__chevron,
.nav-dropdown:focus-within .nav-dropdown__chevron,
.nav-dropdown.is-open .nav-dropdown__chevron {
  transform: rotate(180deg);
}

/* no-hover: disabilita apertura in hover (hashchange) */
.nav-dropdown.no-hover:hover .nav-dropdown__menu {
  opacity: 0;
  transform: translateY(-6px);
  pointer-events: none;
}

.nav-dropdown.no-hover:hover .nav-dropdown__chevron {
  transform: none;
}

.nav-dropdown__item {
  display: block;
  padding: 10px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.nav-dropdown__badge {
  display: inline-flex;
  margin-left: 8px;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.08);
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 800;
}

.nav-dropdown__item--disabled {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--muted);
  opacity: 0.65;
  cursor: default;
}

.nav-dropdown__item:hover {
  background: var(--hover-bg);
  border-color: var(--border);
}

.nav-dropdown__item--disabled:hover {
  background: transparent;
  border-color: transparent;
}

.nav-dropdown__item:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

.nav-dropdown__sep {
  height: 1px;
  background: var(--border);
  margin: 4px 2px;
  border-radius: 999px;
}

.nav-dropdown__item--all {
  font-weight: 800;
}

/* Theme toggle */
.theme-toggle {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--btn-bg);
  cursor: pointer;
  color: var(--icon-muted);

  transition: transform 160ms ease, filter 160ms ease, background-color 220ms ease, border-color 220ms ease, color 220ms ease;
}

.theme-toggle:hover {
  filter: brightness(0.98);
  transform: translateY(-1px);
}

.theme-toggle:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

.theme-toggle__icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* Hamburger (mobile) */
.nav-toggle {
  width: 44px;
  height: 44px;
  display: inline-grid;
  place-items: center;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--btn-bg);
  cursor: pointer;
  color: var(--icon-muted);

  transition: transform 160ms ease, filter 160ms ease, background-color 220ms ease, border-color 220ms ease, color 220ms ease;
}

.nav-toggle:hover {
  filter: brightness(0.98);
  transform: translateY(-1px);
}

.nav-toggle:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

.nav-toggle__icon {
  width: 18px;
  height: 14px;
  display: grid;
  align-content: space-between;
}

.nav-toggle__bar {
  display: block;
  height: 2px;
  width: 100%;
  border-radius: 999px;
  background: currentColor;
}

/* Desktop vs mobile visibility */
.nav--desktop {
  display: none;
}

@media (min-width: 860px) {
  .nav--desktop {
    display: inline-flex;
  }

  .nav-toggle {
    display: none;
  }
}

/* =========================
   Mobile menu (overlay + panel)
   ========================= */

.no-scroll { overflow: hidden; }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 50;

  opacity: 0;
  pointer-events: none;
  visibility: hidden;

  transition: opacity 200ms ease, visibility 0s linear 200ms;
}

.mobile-menu.is-open {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;

  transition: opacity 200ms ease, visibility 0s;
}

.mobile-menu__overlay {
  position: absolute;
  inset: 0;
  background: var(--overlay-bg);
  opacity: 0;
  transition: opacity 200ms ease;
}

.mobile-menu__panel {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 74px;

  border-radius: calc(var(--radius) + 2px);
  border: 1px solid var(--border);
  background: var(--menu-bg);
  box-shadow: 0 18px 45px rgba(2, 6, 23, 0.16);

  transform: translateY(-10px);
  opacity: 0;
  transition: transform 200ms ease, opacity 200ms ease, background-color 220ms ease, border-color 220ms ease;
  overflow: hidden;
}

.mobile-menu.is-open .mobile-menu__overlay { opacity: 1; }
.mobile-menu.is-open .mobile-menu__panel { transform: translateY(0); opacity: 1; }

.mobile-menu__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border);
}

.mobile-menu__title {
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--text);
}

.mobile-menu__close {
  width: 40px;
  height: 40px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
  font-size: 1rem;
  line-height: 1;

  transition: background-color 220ms ease, border-color 220ms ease, color 220ms ease;
}

.mobile-menu__close:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

.nav--mobile {
  display: grid;
  gap: 8px;
  padding: 10px 14px 14px;
}

.nav--mobile a {
  padding: 12px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
}

.nav--mobile a.is-active {
  color: var(--primary);
  background: rgba(29, 78, 216, 0.08);
  border-color: rgba(29, 78, 216, 0.18);
}

/* Mobile dropdown group */
.nav-mobile-group {
  border-radius: 14px;
  border: 1px solid var(--border);
  overflow: hidden;
  background: var(--card-bg);
}

.nav-mobile-group__trigger {
  width: 100%;
  appearance: none;
  background: transparent;
  border: 0;
  padding: 12px 12px;
  font: inherit;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
}

.nav-mobile-group__trigger.is-active {
  color: var(--primary);
  background: rgba(29, 78, 216, 0.08);
}

.nav-mobile-group__trigger:focus-visible {
  outline: 3px solid rgba(37, 99, 235, 0.25);
  outline-offset: 2px;
}

.nav-mobile-group__chevron {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  transition: transform 180ms ease;
}

.nav-mobile-group.is-open .nav-mobile-group__chevron {
  transform: rotate(180deg);
}

.nav-mobile-group__items {
  display: none;
  padding: 10px 10px 12px;
  background: transparent;
}

.nav-mobile-group.is-open .nav-mobile-group__items {
  display: grid;
  gap: 6px;
}

.nav-mobile-group__items .nav-dropdown__item {
  border-radius: 12px;
  padding: 10px 10px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text);
  font-weight: 700;
}

.nav-mobile-group__items .nav-dropdown__item:hover {
  background: var(--hover-bg);
  border-color: var(--border);
}

.nav-mobile-group__items .nav-dropdown__item--disabled:hover {
  background: transparent;
  border-color: transparent;
}

.nav-mobile-group__items .nav-dropdown__sep {
  height: 1px;
  background: var(--border);
  margin: 4px 2px;
  border-radius: 999px;
}