/* ==========================================================================
   TUOIL — slide-out menu
   Panel from the right over a dimmed page. The burger in the header morphs
   into the close control, so there is one toggle and one place to look.
   ========================================================================== */

.c-menu {
  position: fixed;
  inset: 0;
  z-index: var(--z-menu);
}

.c-menu[hidden] { display: none; }

/* --- Dimmed page ----------------------------------------------------------- */
.c-menu__overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 22, 10, 0.55);
  opacity: 0;
  transition: opacity var(--dur-base) var(--ease-out);
  cursor: pointer;
}

.c-menu.is-open .c-menu__overlay { opacity: 1; }

/* --- Panel ----------------------------------------------------------------- */
.c-menu__panel {
  position: absolute;
  inset: 0 0 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: var(--sp-4);
  width: 34%;
  min-width: 380px;
  padding: 112px var(--sp-6) var(--sp-4);
  background: var(--c-base);
  color: var(--c-on-dark);
  overflow-y: auto;
  overscroll-behavior: contain;
  transform: translateX(100%);
  transition: transform 420ms var(--ease-out);
}

.c-menu.is-open .c-menu__panel { transform: translateX(0); }

/* --- Items ------------------------------------------------------------------
   Each row fades up in turn once the panel has started moving. The delay is
   driven by --i on the element, so the order lives in the markup. */
/* stagger order for the entrance */
.c-menu__item:nth-child(1) { --i: 0; }
.c-menu__item:nth-child(2) { --i: 1; }
.c-menu__item:nth-child(3) { --i: 2; }
.c-menu__item:nth-child(4) { --i: 3; }
.c-menu__item:nth-child(5) { --i: 4; }
.c-menu__item:nth-child(6) { --i: 5; }
.c-menu__foot { --i: 6; }

.c-menu__item,
.c-menu__foot {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out);
}

.c-menu.is-open .c-menu__item,
.c-menu.is-open .c-menu__foot {
  opacity: 1;
  transform: translateY(0);
  transition-delay: calc(160ms + var(--i, 0) * 55ms);
}

.c-menu__item + .c-menu__item { border-top: 1px solid rgba(255, 255, 255, 0.12); }

.c-menu__row {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.c-menu__link {
  flex: 1;
  display: block;
  padding: 18px 0;
  text-decoration: none;
  color: inherit;
}

.c-menu__title {
  display: block;
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-heading);
  transition: color var(--dur-fast) var(--ease-out);
}

.c-menu__sub {
  display: block;
  margin-top: 2px;
  font-size: var(--fs-small);
  color: var(--c-on-dark-muted);
}

.c-menu__link:hover .c-menu__title,
.c-menu__link:focus-visible .c-menu__title { color: var(--c-on-dark-muted); }

/* --- Accordion toggle -------------------------------------------------------- */
.c-menu__toggle {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--c-on-dark);
  cursor: pointer;
  transition: background-color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}

.c-menu__toggle:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.45);
}

.c-menu__chevron {
  transition: transform var(--dur-base) var(--ease-out);
}

.c-menu__toggle[aria-expanded='true'] .c-menu__chevron { transform: rotate(180deg); }

/* --- Children ----------------------------------------------------------------
   Animated by grid track rather than by height, so nothing has to be measured
   in script and the row keeps its natural size. */
.c-menu__children {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur-base) var(--ease-out);
}

.c-menu__children.is-open { grid-template-rows: 1fr; }

.c-menu__children-inner {
  overflow: hidden;
  min-height: 0;
}

.c-menu__children-inner li:last-child a { padding-bottom: var(--sp-3); }

.c-menu__children-inner a {
  display: block;
  padding: 6px 0 6px var(--sp-3);
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--c-on-dark-muted);
  font-size: var(--fs-small);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}

.c-menu__children-inner a:hover {
  color: var(--c-on-dark);
  border-left-color: var(--c-on-dark);
}

/* --- Panel foot ---------------------------------------------------------------- */
.c-menu__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--sp-1) var(--sp-3);
  padding-top: var(--sp-3);
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.c-menu__reach {
  color: var(--c-on-dark-muted);
  font-size: var(--fs-small);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.c-menu__reach:hover {
  color: var(--c-on-dark);
  border-bottom-color: currentColor;
}

.c-menu__foot .btn { margin-top: var(--sp-2); }
.c-menu__foot .btn--wide { flex-basis: 100%; }

/* --- Burger in its open state ---------------------------------------------- */
.c-burger[aria-expanded='true'] .c-burger__line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}
.c-burger[aria-expanded='true'] .c-burger__line:nth-child(2) {
  opacity: 0;
  width: 100%;
}
.c-burger[aria-expanded='true'] .c-burger__line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* While the panel is open the burger sits on the olive fill, whatever tone
   the page header started with. */
.c-header.is-menu-open .c-burger { color: var(--c-on-dark); }
.c-header.is-menu-open .c-burger__box { filter: none; }

/* --- Adaptive ------------------------------------------------------------------ */
@media (max-width: 1280px) {
  .c-menu__panel { width: 60%; }
}

@media (max-width: 768px) {
  .c-menu__panel {
    width: 100%;
    min-width: 0;
    padding: 104px var(--container-pad) var(--sp-4);
  }
  .c-menu__title { font-size: 1.375rem; }
}