/* T318 — phone navigation follows the Material 3 navigation-bar + modal-drawer pattern. */
:root {
  --cc-layer-mobile-bar: 50;
  --cc-layer-mobile-scrim: 55;
  --cc-layer-mobile-drawer: 60;
}

.mobile-frequency-bar,
.mobile-navigation-scrim {
  display: none;
}

.mobile-navigation-drawer {
  position: fixed;
  z-index: var(--cc-layer-mobile-drawer);
  top: 0;
  bottom: 0;
  left: 0;
  display: flex;
  width: min(20rem, calc(100vw - 2.5rem));
  max-width: 100vw;
  flex-direction: column;
  overflow: hidden;
  border-right: 1px solid var(--ui-line);
  border-radius: 0 1rem 1rem 0;
  background: var(--ui-panel);
  box-shadow: var(--ui-shadow);
  transform: translateX(-105%);
  visibility: hidden;
  pointer-events: none;
  transition: transform 180ms ease, visibility 0s linear 180ms;
}

/* T321 phone-only parking keeps existing event-bound controls addressable while
   removing them from the topbar DOM. Desktop restores every node to its source
   sibling; this root never paints. */
.mobile-topbar-parking {
  display: none !important;
}

.mobile-navigation-drawer.open {
  transform: translateX(0);
  visibility: visible;
  pointer-events: auto;
  transition: transform 180ms ease;
}

.mobile-navigation-header {
  display: flex;
  min-height: 4rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: max(0.65rem, env(safe-area-inset-top, 0px)) 1rem 0.65rem;
  border-bottom: 1px solid var(--ui-line);
  background: var(--ui-panel);
}

.mobile-navigation-header h2 {
  margin: 0;
  color: var(--ui-text);
  font-size: 1.05rem;
}

.mobile-navigation-header-copy {
  min-width: 0;
  display: grid;
  gap: 0.35rem;
}

.mobile-navigation-account {
  min-width: 0;
  color: var(--ui-text-soft);
  font-size: 0.72rem;
}

.mobile-navigation-account .hosted-session {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 0.5rem;
}

/* Shell round (19 Aug): the email label (.hosted-user) is .visually-hidden
   now — sign-out is icon-only everywhere, including this drawer, so there
   is no visible label to size here any more. The sign-out control itself
   (.shell-sign-out, chrome-fidelity.css) is only a 30px desktop hit target
   sized to match the sidebar operator avatar; relocated into this drawer
   on phone it still needs a real 44px tap target like every other T321
   drawer control. */
.mobile-navigation-account .shell-sign-out {
  min-width: 44px;
  min-height: 44px;
}

.mobile-navigation-close {
  display: grid;
  width: 2.75rem;
  min-width: 44px;
  height: 2.75rem;
  min-height: 44px;
  place-items: center;
  border: 1px solid var(--ui-line);
  border-radius: 50%;
  background: var(--ui-raised);
  color: var(--ui-text-soft);
  font-size: 1.5rem;
  line-height: 1;
}

.mobile-navigation-scroll {
  min-height: 0;
  flex: 1 1 auto;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.65rem 0.75rem max(0.75rem, env(safe-area-inset-bottom, 0px));
}

.mobile-navigation-footer {
  display: flex;
  min-height: 3.75rem;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.55rem 1rem max(0.55rem, env(safe-area-inset-bottom, 0px));
  border-top: 1px solid var(--ui-line);
  background: var(--ui-panel);
}

.mobile-navigation-footer-label {
  color: var(--ui-muted);
  font-size: 0.75rem;
  font-weight: 650;
}

.mobile-navigation-theme {
  display: flex;
  align-items: center;
}

.mobile-navigation-footer #theme-toggle {
  display: grid;
  width: 44px;
  min-width: 44px;
  height: 44px;
  min-height: 44px;
  place-items: center;
  padding: 0;
}

.mobile-navigation-group + .mobile-navigation-group {
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--ui-line-soft);
}

.mobile-navigation-group h3 {
  margin: 0.35rem 0.75rem 0.35rem;
  color: var(--ui-muted);
  font: 700 0.68rem/1.2 ui-monospace, Menlo, monospace;
  letter-spacing: 0.11em;
}

.mobile-navigation-row {
  display: grid;
  width: 100%;
  min-width: 0;
  min-height: 56px;
  grid-template-columns: 1.65rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.7rem;
  padding: 0.5rem 0.75rem;
  border: 0;
  border-radius: 0.75rem;
  background: transparent;
  color: var(--ui-text);
  font: inherit;
  text-align: left;
}

.mobile-navigation-row:hover,
.mobile-navigation-row:focus-visible {
  background: var(--ui-hover);
}

.mobile-navigation-row-icon,
.mobile-navigation-chevron {
  display: grid;
  place-items: center;
  color: var(--ui-text-soft);
}

.mobile-navigation-row-icon .ui-icon {
  width: 1.3rem;
  height: 1.3rem;
}

.mobile-navigation-chevron {
  color: var(--ui-muted);
  font-size: 1.45rem;
  line-height: 1;
}

.mobile-navigation-scrim {
  position: fixed;
  z-index: var(--cc-layer-mobile-scrim);
  inset: 0;
  background: rgb(0 0 0 / 0.48);
}

@media (max-width: 820px) {
  .mobile-frequency-bar {
    z-index: var(--cc-layer-mobile-bar);
    display: grid;
    min-height: calc(56px + env(safe-area-inset-bottom, 0px));
    grid-area: navigation;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: stretch;
    gap: 0;
    padding: 0 max(0.2rem, env(safe-area-inset-left, 0px))
      env(safe-area-inset-bottom, 0px)
      max(0.2rem, env(safe-area-inset-right, 0px));
    border-top: 1px solid var(--ui-line);
    background: var(--ui-panel);
  }

  .mobile-frequency-item {
    position: relative;
    display: grid;
    min-width: 44px;
    min-height: 56px;
    grid-template-rows: 1.35rem 1rem;
    align-content: center;
    justify-items: center;
    gap: 0.18rem;
    padding: 0.3rem 0.2rem;
    border: 0;
    border-radius: 0.65rem;
    background: transparent;
    color: var(--ui-muted);
    font: inherit;
    line-height: 1;
  }

  .mobile-frequency-item:hover,
  .mobile-frequency-item:focus-visible,
  .mobile-frequency-item[aria-current="page"] {
    background: var(--ui-accent-soft);
    color: var(--ui-accent);
  }

  .mobile-frequency-item:focus-visible {
    outline: 2px solid var(--ui-accent);
    outline-offset: -2px;
  }

  .mobile-frequency-icon .ui-icon {
    width: 1.3rem;
    height: 1.3rem;
  }

  .mobile-frequency-label {
    max-width: 100%;
    overflow: hidden;
    color: inherit;
    font-size: 0.7rem;
    font-weight: 650;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .mobile-frequency-badge {
    position: absolute;
    top: 0.2rem;
    left: calc(50% + 0.35rem);
    min-width: 1.1rem;
    min-height: 1.1rem;
    padding: 0.15rem 0.28rem;
    border: 2px solid var(--ui-panel);
    border-radius: 999px;
    background: var(--ui-warning);
    color: var(--ui-primary-text);
    font: 750 0.62rem/1 ui-monospace, Menlo, monospace;
    text-align: center;
  }

  /* Keep the compatibility overflow control measurable for existing shell
     contracts, but remove it from the phone's visible and accessible shell. */
  .shell-overflow-wrap {
    visibility: hidden;
  }

  .mobile-navigation-scrim:not([hidden]) {
    display: block;
  }

  .mobile-navigation-drawer {
    top: 0;
    width: min(20rem, calc(100vw - 2.5rem));
    padding-top: env(safe-area-inset-top, 0px);
  }

  .mobile-topbar-brand {
    cursor: pointer;
    border-radius: 0.5rem;
  }

  .mobile-topbar-brand:focus-visible {
    outline: 2px solid var(--ui-accent);
    outline-offset: 3px;
  }

  .connections-layout > .conn-subtabs {
    display: grid;
    gap: 0;
    overflow: hidden;
    border: 1px solid var(--ui-line);
    border-radius: 0.75rem;
  }

  .connections-layout > .conn-subtabs .conn-subtab {
    display: grid;
    min-height: 56px;
    align-items: center;
    justify-items: start;
    padding: 0.5rem 0.85rem;
    border: 0;
    border-bottom: 1px solid var(--ui-line-soft);
    border-radius: 0;
    text-align: left;
  }

  .connections-layout > .conn-subtabs .conn-subtab:last-child {
    border-bottom: 0;
  }

  body.mobile-navigation-open {
    overflow: hidden;
  }

  /* T323: Talk keeps the frequency bar (and Menu drawer). */
  body.standalone .mobile-frequency-bar,
  body.standalone .mobile-navigation-drawer,
  body.standalone .mobile-navigation-scrim {
    display: none !important;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mobile-navigation-drawer {
    transition: none;
  }
}