/* =============================================================================
   PHONE APP SHELL — max-width: 767px only.
   Desktop (768px+) must remain unchanged. Do not add unscoped rules here.
   ============================================================================= */

.app-tabbar,
.app-more {
  display: none;
}

@media (max-width: 767px) {
  html,
  body {
    overflow-x: clip;
  }

  html {
    scroll-padding-bottom: var(--app-tabbar-h);
  }

  body {
    padding-bottom: var(--app-tabbar-h);
  }

  .menu-toggle {
    display: none !important;
  }

  .ask-ai__icons {
    overscroll-behavior-x: contain;
  }

  /* ---- Tab bar ----------------------------------------------------------- */
  .app-tabbar {
    display: flex;
    position: fixed;
    inset-inline: 0;
    bottom: 0;
    z-index: var(--z-tabbar);
    height: var(--app-tabbar-h);
    padding-bottom: env(safe-area-inset-bottom, 0px);
    margin: 0;
    list-style: none;
    background: color-mix(in srgb, var(--color-bg-raised) 88%, transparent);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-top: 1px solid var(--color-border-subtle);
    box-shadow: 0 -12px 32px -20px rgba(0, 0, 0, 0.7);
  }

  .app-tab {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.15rem;
    min-width: 0;
    min-height: 3.25rem;
    padding: 0.4rem 0.2rem 0.3rem;
    border: 0;
    background: transparent;
    color: var(--color-text-muted);
    text-decoration: none;
    font-family: var(--font-body);
    font-size: 0.625rem;
    font-weight: var(--weight-medium);
    line-height: 1.15;
    letter-spacing: 0.01em;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    transition: color var(--duration-fast) var(--ease-out);
  }

  .app-tab:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -4px;
  }

  .app-tab__icon {
    position: relative;
    width: 1.4rem;
    height: 1.4rem;
    flex-shrink: 0;
  }

  .app-tab__icon svg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    transition: opacity var(--duration-fast) var(--ease-out),
      transform var(--duration-fast) var(--ease-out);
  }

  .app-tab__icon--fill {
    opacity: 0;
    transform: scale(0.86);
  }

  .app-tab.is-active {
    color: var(--color-accent);
    font-weight: var(--weight-semibold);
  }

  .app-tab.is-active .app-tab__icon--line {
    opacity: 0;
    transform: scale(0.86);
  }

  .app-tab.is-active .app-tab__icon--fill {
    opacity: 1;
    transform: scale(1);
  }

  .app-tab__label {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* ---- More sheet -------------------------------------------------------- */
  .app-more:not([hidden]) {
    display: block;
  }

  .app-more {
    position: fixed;
    inset: 0 0 var(--app-tabbar-h);
    z-index: var(--z-mega);
    pointer-events: none;
  }

  .app-more.is-open {
    pointer-events: auto;
  }

  .app-more__backdrop {
    position: absolute;
    inset: 0;
    border: 0;
    padding: 0;
    margin: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.46);
    opacity: 0;
    cursor: pointer;
    transition: opacity var(--duration-base) var(--ease-out);
  }

  .app-more.is-open .app-more__backdrop {
    opacity: 1;
  }

  .app-more__sheet {
    position: absolute;
    inset-inline: 0;
    bottom: 0;
    max-height: min(78dvh, calc(100dvh - var(--header-height) - 0.75rem));
    overflow-y: auto;
    overscroll-behavior: contain;
    padding: 0.35rem var(--space-5) var(--space-6);
    border: 1px solid var(--color-border-default);
    border-bottom: 0;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    background: var(--color-bg-raised);
    box-shadow: var(--shadow-lg);
    transform: translateY(110%);
    transition: transform var(--duration-slow) var(--ease-out);
  }

  .app-more.is-open .app-more__sheet {
    transform: translateY(0);
  }

  .app-more__handle {
    display: block;
    width: 2.25rem;
    height: 0.28rem;
    margin: 0.35rem auto 0.85rem;
    border-radius: var(--radius-pill);
    background: var(--color-border-emphasis);
  }

  .app-more__group {
    margin: 0 0 var(--space-5);
  }

  .app-more__label {
    margin: 0 0 var(--space-2);
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    color: var(--color-text-muted);
  }

  .app-more__list {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--color-border-subtle);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg-overlay);
  }

  .app-more__item {
    display: flex;
    align-items: center;
    min-height: 2.75rem;
    padding: 0.7rem var(--space-4);
    border: 0;
    border-bottom: 1px solid var(--color-border-subtle);
    background: transparent;
    color: var(--color-text-primary);
    font-family: var(--font-body);
    font-size: var(--text-sm);
    font-weight: var(--weight-medium);
    text-align: start;
    text-decoration: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
  }

  .app-more__item:last-child {
    border-bottom: 0;
  }

  .app-more__item:active {
    background: var(--color-accent-muted);
  }

  /* ---- Support FAB + in-bounds sheet ------------------------------------- */
  .support {
    right: 14px;
    left: auto;
    inset-inline-end: auto;
    inset-inline-start: auto;
    bottom: calc(var(--app-tabbar-h) + 14px);
  }

  html.is-rtl .support {
    right: auto;
    left: 14px;
    inset-inline-end: auto;
    inset-inline-start: auto;
  }

  body.is-more-open .support {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity var(--duration-fast) var(--ease-out),
      visibility 0s linear var(--duration-fast);
  }

  .support__nudge {
    position: fixed;
    right: 14px;
    left: auto;
    inset-inline-end: auto;
    bottom: calc(var(--app-tabbar-h) + 14px + 3.4rem + 0.85rem);
    width: min(16.5rem, calc(100% - 28px));
    max-width: calc(100% - 28px);
  }

  html.is-rtl .support__nudge {
    right: auto;
    left: 14px;
    inset-inline-end: auto;
  }

  .support__panel {
    position: fixed;
    inset-inline: 12px;
    right: auto;
    left: auto;
    bottom: calc(var(--app-tabbar-h) + 12px);
    width: auto;
    max-width: none;
    max-height: calc(100dvh - var(--header-height) - var(--app-tabbar-h) - 24px);
    transform-origin: bottom center;
  }

  html.is-rtl .support__panel {
    right: auto;
    left: auto;
  }
}

@media (max-width: 767px) and (prefers-reduced-motion: reduce) {
  .app-tab,
  .app-tab__icon svg,
  .app-more__backdrop,
  .app-more__sheet,
  body.is-more-open .support {
    transition: none;
  }
}