/**
 * Evident ICU Public Drawer Foundation
 *
 * Purpose:
 * Replace stacked emergency drawer patches with one predictable cross-browser
 * mobile / narrow-window drawer contract.
 *
 * Browser target:
 * - Firefox Mobile
 * - Safari Mobile
 * - Chromium Mobile/Desktop narrow windows
 *
 * Contract:
 * JS toggles:
 * - html.site-drawer-open
 * - body.site-drawer-open
 * - #mobile-drawer.is-open
 * - #mobile-drawer[aria-hidden="false"]
 * - #mobile-nav-toggle[aria-expanded="true"]
 */

:root {
  --ev-drawer-z: 50000;
  --ev-drawer-backdrop-z: 49990;
  --ev-drawer-toggle-z: 50010;
  --ev-drawer-bg:
    radial-gradient(circle at 18% 0%, rgba(112, 58, 91, 0.24), transparent 34rem),
    radial-gradient(circle at 88% 8%, rgba(47, 98, 171, 0.22), transparent 38rem),
    linear-gradient(180deg, rgba(8, 18, 33, 0.992), rgba(5, 13, 25, 0.998));
}

html.site-drawer-open,
body.site-drawer-open {
  overflow: hidden !important;
  overscroll-behavior: none;
  touch-action: none;
}

body.site-drawer-open .site-header {
  position: relative;
  z-index: var(--ev-drawer-z) !important;
  isolation: isolate;
}

/* Closed state: present in DOM, but inert. */
#mobile-drawer.site-header__drawer {
  position: fixed;
  inset: 0;
  z-index: var(--ev-drawer-z);
  width: 100vw;
  min-width: 100vw;
  max-width: none;
  height: 100vh;
  min-height: 100vh;
  max-height: 100vh;
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-0.375rem);
  background: var(--ev-drawer-bg);
  transition:
    opacity 180ms ease,
    transform 220ms ease,
    visibility 0s linear 220ms;
  padding:
    max(1rem, env(safe-area-inset-top))
    clamp(1.25rem, 5vw, 4rem)
    max(1.5rem, env(safe-area-inset-bottom));
  box-shadow: 0 2rem 6rem rgba(0, 0, 0, 0.55);
}

@supports (height: 100svh) {
  #mobile-drawer.site-header__drawer {
    height: 100svh;
    min-height: 100svh;
    max-height: 100svh;
  }
}

@supports (height: 100dvh) {
  #mobile-drawer.site-header__drawer {
    height: 100dvh;
    min-height: 100dvh;
    max-height: 100dvh;
  }
}

/* Open state. */
body.site-drawer-open #mobile-drawer.site-header__drawer,
#mobile-drawer.site-header__drawer.is-open,
#mobile-drawer.site-header__drawer[aria-hidden="false"] {
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
  transform: none !important;
  transition:
    opacity 180ms ease,
    transform 220ms ease,
    visibility 0s linear 0s;
}

/* Backdrop is non-essential; drawer itself owns the full viewport. */
#drawer-backdrop.site-header__drawer-backdrop {
  position: fixed;
  inset: 0;
  z-index: var(--ev-drawer-backdrop-z);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  background: rgba(0, 0, 0, 0.52);
}

#drawer-backdrop.site-header__drawer-backdrop.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

/* The actual content wrapper. This is the part Firefox was likely exposing. */
#mobile-drawer .site-header__drawer-shell {
  display: grid !important;
  grid-template-rows: auto 1fr auto;
  align-content: start;
  gap: clamp(1.75rem, 6vw, 4rem);
  width: min(100%, 46rem);
  min-height: calc(100vh - 3rem);
  margin-inline: auto;
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
  transform: none !important;
}

@supports (height: 100dvh) {
  #mobile-drawer .site-header__drawer-shell {
    min-height: calc(100dvh - 3rem);
  }
}

#mobile-drawer nav,
#mobile-drawer .site-header__drawer-menu,
#mobile-drawer .site-header__drawer-actions {
  display: grid !important;
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
  transform: none !important;
}

#mobile-drawer .site-header__drawer-menu {
  gap: clamp(1.125rem, 4vw, 2rem);
  list-style: none;
  margin: 0;
  padding: clamp(2rem, 8vw, 5rem) 0 0;
}

#mobile-drawer .site-header__drawer-actions {
  gap: 0.875rem;
  width: 100%;
}

#mobile-drawer .site-header__drawer-link,
#mobile-drawer .site-header__drawer-summary,
#mobile-drawer .site-header__btn {
  display: flex !important;
  align-items: center;
  justify-content: space-between;
  min-height: 3.25rem;
  opacity: 1 !important;
  visibility: visible !important;
  pointer-events: auto !important;
  color: rgba(239, 246, 255, 0.95);
}

#mobile-drawer .site-header__drawer-link {
  font-size: clamp(1.125rem, 4vw, 1.625rem);
  font-weight: 750;
  text-decoration: none;
}

/* Keep the toggle/close button above the drawer in every browser. */
body.site-drawer-open #mobile-nav-toggle {
  position: relative;
  z-index: var(--ev-drawer-toggle-z) !important;
}

/* While open, page art cannot steal hit testing behind the drawer. */
body.site-drawer-open main {
  pointer-events: none;
}

/* But header/drawer must stay interactive. */
body.site-drawer-open .site-header,
body.site-drawer-open .site-header *,
body.site-drawer-open #mobile-drawer,
body.site-drawer-open #mobile-drawer * {
  pointer-events: auto;
}