/* Mobile prep shell — layout/chrome only (no flashcard.js behavior). */

.rsi-mobile-prep-shell {
  --rsi-cert-bar-h: 52px;
  --rsi-program-nav-h: 44px;
  max-width: 920px;
  margin: 0 auto;
  padding: 0 1.25rem 0;
  min-width: 0;
}

.rsi-cert-bar {
  position: sticky;
  top: 0;
  z-index: 1040;
  display: flex;
  align-items: stretch;
  gap: 0.35rem;
  min-height: var(--rsi-cert-bar-h);
  max-height: 56px;
  padding: calc(0.35rem + env(safe-area-inset-top, 0px)) 0 0.35rem;
  margin: 0 -0.15rem 0.65rem;
  background: linear-gradient(
    180deg,
    rgba(5, 13, 26, 0.97) 0%,
    rgba(12, 30, 61, 0.92) 100%
  );
  border-bottom: 1px solid rgba(201, 162, 39, 0.35);
  -webkit-overflow-scrolling: touch;
  overflow-x: auto;
}

.rsi-cert-bar__btn {
  flex: 1 1 auto;
  min-width: 3.25rem;
  min-height: 44px;
  padding: 0.4rem 0.55rem;
  border-radius: 8px;
  border: 1px solid rgba(201, 162, 39, 0.35);
  background: rgba(5, 13, 26, 0.55);
  color: var(--rsi-muted, #9fb0cc);
  font-family: inherit;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  white-space: nowrap;
}

.rsi-cert-bar__btn.is-active {
  color: var(--rsi-navy-deep, #050d1a);
  background: linear-gradient(180deg, #d4b03a 0%, var(--rsi-gold, #c9a227) 100%);
  border-color: var(--rsi-gold, #c9a227);
}

.rsi-cert-bar__btn.is-soon {
  opacity: 0.55;
  cursor: pointer;
}

.rsi-cert-bar__btn.is-soon::after {
  content: " soon";
  font-size: 0.58rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: lowercase;
}

.rsi-prep-deck-host {
  display: none;
  min-height: clamp(240px, 55vh, 360px);
  margin-bottom: 0.5rem;
}

.rsi-mobile-prep-shell.rsi-shell--mobile-prep-active .rsi-prep-deck-host {
  display: block;
}

.rsi-prep-deck-host .rsi-chda-deck-bundle {
  margin-top: 0;
}

/* Hide prep tab strip entries — cert bar is the prep switcher. */
#rsi_main_nav > .nav-item[data-rsi-prep-tab],
#rsi_main_nav.nav-tabs > .nav-item[data-rsi-prep-tab],
#rsi_main_nav > ul.nav.nav-tabs > .nav-item[data-rsi-prep-tab] {
  display: none !important;
}

.rsi-program-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1045;
  background: rgba(5, 13, 26, 0.55);
  -webkit-tap-highlight-color: transparent;
}

.rsi-program-backdrop.is-open {
  display: block;
}

html.rsi-drawer-scroll-lock,
body.rsi-drawer-scroll-lock {
  overflow: hidden !important;
  overscroll-behavior: none;
}

/* ≤900px: single compact Program control; architect links in overlay drawer only. */
@media (max-width: 900px) {
  .rsi-mobile-prep-shell .rsi-navset-scroll-wrap {
    margin-top: 0;
    margin-bottom: 0.35rem;
    max-height: none;
    overflow: visible;
  }

  .rsi-mobile-prep-shell.rsi-shell--mobile-prep-active .rsi-prep-chda-practice
    .rsi-chda-deck-bundle {
    display: none;
  }

  .rsi-mobile-prep-shell.rsi-shell--mobile-prep-active .rsi-prep-deck-host
    .rsi-chda-deck-bundle {
    display: block;
  }

  .rsi-prep-deck-host {
    padding-bottom: calc(4.5rem + env(safe-area-inset-bottom, 0px));
  }

  #rsi_main_nav > .nav-item:not([data-rsi-program-tab]),
  #rsi_main_nav.nav-tabs > .nav-item:not([data-rsi-program-tab]),
  #rsi_main_nav > ul.nav.nav-tabs > .nav-item:not([data-rsi-program-tab]) {
    display: none !important;
  }

  #rsi_main_nav > .nav-item[data-rsi-program-tab],
  #rsi_main_nav.nav-tabs > .nav-item[data-rsi-program-tab],
  #rsi_main_nav > ul.nav.nav-tabs > .nav-item[data-rsi-program-tab] {
    display: list-item !important;
    max-height: var(--rsi-program-nav-h);
    overflow: visible;
  }

  #rsi_main_nav.nav-tabs,
  #rsi_main_nav > ul.nav.nav-tabs {
    min-height: 0;
    max-height: var(--rsi-program-nav-h);
    margin-bottom: 0;
    border-bottom: none;
    overflow: visible !important;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .nav-link.dropdown-toggle {
    display: inline-flex !important;
    align-items: center;
    min-height: 40px;
    padding: 0.4rem 0.9rem;
    margin: 0;
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--rsi-muted, #9fb0cc) !important;
    border: 1px solid rgba(201, 162, 39, 0.35);
    border-radius: 8px;
    background: rgba(5, 13, 26, 0.55);
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .nav-link.dropdown-toggle::after {
    margin-left: 0.45rem;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .nav-link.dropdown-toggle.show,
  #rsi_main_nav .nav-item.rsi-program-menu > .nav-link.dropdown-toggle[aria-expanded="true"] {
    color: var(--rsi-gold, #c9a227) !important;
    border-color: var(--rsi-gold, #c9a227);
  }

  /* Drawer: fixed overlay — never consumes layout height above prep content. */
  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu {
    position: fixed !important;
    top: calc(var(--rsi-cert-bar-h) + env(safe-area-inset-top, 0px) + 0.5rem) !important;
    left: 1rem !important;
    right: 1rem !important;
    bottom: auto !important;
    width: auto !important;
    max-width: 22rem;
    margin: 0 auto;
    max-height: min(55vh, 360px);
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 1050;
    border: 1px solid rgba(201, 162, 39, 0.45);
    border-radius: 10px;
    background: rgba(5, 13, 26, 0.98) !important;
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.5);
    padding: 0.35rem 0 !important;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu:not(.show) {
    display: none !important;
    visibility: hidden !important;
    pointer-events: none !important;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu .dropdown-item,
  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu .nav-link {
    padding: 0.65rem 1rem;
    color: var(--rsi-cream, #e8ecf4);
    white-space: nowrap;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu .dropdown-item.active,
  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu .nav-link.active {
    color: var(--rsi-gold, #c9a227);
    background: rgba(201, 162, 39, 0.12);
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu > li.nav-item.dropdown > .dropdown-menu {
    position: static !important;
    display: none;
    border: none;
    box-shadow: none;
    background: rgba(5, 13, 26, 0.65);
    margin: 0;
    padding-left: 0.5rem;
  }

  #rsi_main_nav
    .nav-item.rsi-program-menu
    > .dropdown-menu
    > li.nav-item.dropdown.show
    > .dropdown-menu {
    display: block !important;
  }
}

/* ≥901px: one chrome row (cert | program tabs | bundle/plans); panes below, not in bar height. */
@media (min-width: 901px) {
  .rsi-prep-deck-host {
    display: none !important;
  }

  .rsi-mobile-prep-shell .rsi-chda-deck-bundle {
    display: block;
  }

  .rsi-program-backdrop {
    display: none !important;
  }

  .rsi-primary-nav {
    margin: 0 -0.15rem 0.65rem;
    padding: 0;
    background: transparent;
    border: none;
  }

  .rsi-prep-chrome-sticky {
    --rsi-prep-chrome-h: 52px;
    position: sticky;
    top: 0;
    z-index: 1040;
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.35rem;
    min-height: var(--rsi-prep-chrome-h);
    padding: calc(0.35rem + env(safe-area-inset-top, 0px)) 0 0.35rem;
    background: linear-gradient(
      180deg,
      rgba(5, 13, 26, 0.97) 0%,
      rgba(12, 30, 61, 0.92) 100%
    );
    border-bottom: 1px solid rgba(201, 162, 39, 0.35);
    overflow: visible;
  }

  .rsi-prep-chrome-sticky > .rsi-cert-bar {
    display: flex;
    flex: 0 0 auto;
    align-items: center;
    gap: 0.35rem;
    min-height: 0;
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    overflow: visible;
    position: relative;
    z-index: 2;
  }

  .rsi-prep-chrome-sticky > .rsi-prep-deck-host,
  .rsi-primary-nav > .rsi-prep-deck-host {
    display: none !important;
  }

  .rsi-prep-chrome-sticky > .rsi-navset-scroll-wrap {
    flex: 1 1 auto;
    min-width: 0;
    display: flex;
    align-items: center;
    overflow: visible;
    position: static;
    z-index: 1;
  }

  .rsi-prep-chrome-sticky #rsi_main_nav {
    position: static;
    display: block;
    flex: 1 1 auto;
    min-width: 0;
    width: 100%;
    margin: 0 !important;
    border: none;
    max-height: none;
  }

  /* Full-width body row below chrome; absolute keeps sticky bar ~52px (Issue 7). */
  .rsi-primary-nav {
    position: relative;
  }

  .rsi-prep-chrome-sticky #rsi_main_nav > .tab-content,
  .rsi-prep-chrome-sticky .tab-content {
    position: absolute;
    left: 0;
    right: 0;
    top: calc(100% + 0.35rem);
    width: 100%;
    margin: 0;
    padding: 0;
    border: none;
    background: transparent;
    z-index: 0;
  }

  #rsi_main_nav.nav-tabs,
  #rsi_main_nav > ul.nav.nav-tabs {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    align-items: center;
    align-content: center;
    overflow: visible !important;
    max-height: none;
    border-bottom: none !important;
    margin-bottom: 0 !important;
    gap: 0.1rem 0.2rem;
  }

  #rsi_main_nav .nav-item.rsi-program-menu {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    flex: 1 1 auto;
    min-width: 0;
    align-items: center;
    max-height: none;
    overflow: visible;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .nav-link.dropdown-toggle {
    display: none !important;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    align-items: center;
    align-content: center;
    position: static !important;
    float: none !important;
    visibility: visible !important;
    opacity: 1 !important;
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    max-height: none;
    overflow: visible !important;
    gap: 0.1rem 0.15rem;
    min-width: 0;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu > li {
    display: flex !important;
    flex-shrink: 0;
    align-items: center;
  }

  /* Flatten Practice Lab / Certification nested menus into the same row. */
  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu > li.nav-item.dropdown {
    display: contents !important;
  }

  #rsi_main_nav
    .nav-item.rsi-program-menu
    > .dropdown-menu
    > li.nav-item.dropdown
    > .nav-link.dropdown-toggle {
    display: none !important;
  }

  #rsi_main_nav
    .nav-item.rsi-program-menu
    > .dropdown-menu
    > li.nav-item.dropdown
    > .dropdown-menu {
    display: flex !important;
    flex-direction: row !important;
    flex-wrap: wrap !important;
    align-items: center;
    position: static !important;
    float: none !important;
    border: none !important;
    box-shadow: none !important;
    background: transparent !important;
    padding: 0 !important;
    margin: 0 !important;
    gap: 0.1rem 0.15rem;
  }

  #rsi_main_nav
    .nav-item.rsi-program-menu
    > .dropdown-menu
    > li.nav-item.dropdown
    > .dropdown-menu
    > li {
    display: flex !important;
    flex-shrink: 0;
    align-items: center;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu .dropdown-item,
  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu > li > .nav-link {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.65rem;
    border-bottom: 2px solid transparent;
    color: var(--rsi-muted, #9fb0cc);
    background: transparent;
    white-space: nowrap;
    font-size: 0.82rem;
  }

  .rsi-prep-chrome-sticky .rsi-cert-bar__btn {
    min-height: 40px;
    padding: 0.45rem 0.6rem;
    font-size: 0.68rem;
  }

  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu .dropdown-item.active,
  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu .dropdown-item:active,
  #rsi_main_nav .nav-item.rsi-program-menu > .dropdown-menu > li > .nav-link.active {
    color: var(--rsi-gold, #c9a227);
    background: transparent;
    border-bottom-color: var(--rsi-gold, #c9a227);
  }
}