/* Mobile bottom-tab navigation + More sheet (≤768px). Desktop unchanged. */

.mobile-tab-bar,
.mobile-more-scrim {
    display: none;
}

.tools-menu-divider,
.more-mode-row,
.tools-menu-link {
    display: none;
}

@media (max-width: 768px) {
    body {
        padding-bottom: calc(56px + env(safe-area-inset-bottom, 0px));
    }

    /* Top bar fully gone on mobile — More sheet lives outside .header */
    .header {
        display: none !important;
    }

    /* Bottom tab bar — pinned to visual viewport (iOS URL-bar safe) */
    .mobile-tab-bar {
        display: flex;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        max-width: 100%;
        z-index: 1200;
        height: calc(56px + env(safe-area-inset-bottom, 0px));
        padding: 0 0.15rem env(safe-area-inset-bottom, 0px);
        box-sizing: border-box;
        align-items: stretch;
        justify-content: space-around;
        background: #fffdf9;
        border-top: 1px solid var(--color-border, rgba(28, 25, 22, 0.12));
        box-shadow: 0 -6px 20px rgba(28, 25, 22, 0.06);
        transform: translate3d(0, 0, 0);
        -webkit-transform: translate3d(0, 0, 0);
        backface-visibility: hidden;
        -webkit-backface-visibility: hidden;
        will-change: transform;
    }

    [data-theme="dark"] .mobile-tab-bar {
        background: #0e141b;
        border-top-color: rgba(148, 163, 184, 0.22);
        box-shadow: 0 -6px 20px rgba(0, 0, 0, 0.35);
    }

    .mobile-tab {
        flex: 1 1 0;
        min-width: 0;
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 0.12rem;
        padding: 0.35rem 0.15rem 0.3rem;
        border: 0;
        background: transparent;
        color: var(--color-dark-gray, #6b6358);
        text-decoration: none;
        font-family: var(--font-body, sans-serif);
        font-size: 0.65rem;
        font-weight: 600;
        line-height: 1.1;
        letter-spacing: 0.01em;
        -webkit-tap-highlight-color: transparent;
        cursor: pointer;
    }

    .mobile-tab .icon-svg {
        width: 1.35rem;
        height: 1.35rem;
        display: block;
    }

    .mobile-tab.is-active {
        color: var(--color-accent-dark, #8d6240);
    }

    [data-theme="dark"] .mobile-tab {
        color: var(--color-medium-gray, #9aa8b6);
    }

    [data-theme="dark"] .mobile-tab.is-active {
        color: var(--color-accent, #b58863);
    }

    .mobile-more-scrim {
        display: none;
        position: fixed;
        inset: 0;
        z-index: 1140;
        background: rgba(15, 23, 42, 0.42);
        border: 0;
        padding: 0;
        margin: 0;
        cursor: pointer;
    }

    .mobile-more-scrim.is-open {
        display: block;
    }

    /* More sheet = restyled #headerToolsMenu (outside hidden header) */
    #headerToolsMenu.header-tools-menu {
        top: auto !important;
        left: 0 !important;
        right: 0 !important;
        bottom: calc(56px + env(safe-area-inset-bottom, 0px)) !important;
        position: fixed !important;
        width: auto !important;
        min-width: 0 !important;
        max-width: none !important;
        max-height: min(72vh, 520px);
        overflow-x: hidden;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        margin: 0 !important;
        padding: 1.15rem 1rem 0.85rem !important;
        border-radius: 18px 18px 0 0 !important;
        border: 1px solid var(--color-border, rgba(28, 25, 22, 0.12)) !important;
        border-bottom: 0 !important;
        box-shadow: 0 -16px 40px rgba(15, 23, 42, 0.22) !important;
        z-index: 1180 !important;
        align-items: stretch !important;
        background: var(--color-white, #fff) !important;
        backdrop-filter: none !important;
        -webkit-backdrop-filter: none !important;
    }

    #headerToolsMenu.header-tools-menu.open {
        display: flex !important;
        flex-direction: column !important;
    }

    #headerToolsMenu.header-tools-menu::before {
        content: "";
        display: block;
        width: 42px;
        height: 4px;
        border-radius: 999px;
        background: var(--color-light-gray, #e5e0d8);
        margin: 0 auto 0.85rem;
        flex-shrink: 0;
    }

    [data-theme="dark"] #headerToolsMenu.header-tools-menu {
        background: #161e27 !important;
        border-color: rgba(148, 163, 184, 0.25) !important;
        box-shadow: 0 -16px 40px rgba(0, 0, 0, 0.5) !important;
    }

    [data-theme="dark"] #headerToolsMenu.header-tools-menu::before {
        background: rgba(148, 163, 184, 0.45);
    }

    .tools-menu-divider {
        display: block;
        height: 1px;
        width: 100%;
        margin: 0.55rem 0;
        background: var(--color-border, rgba(28, 25, 22, 0.12));
        border: 0;
        flex-shrink: 0;
    }

    [data-theme="dark"] .tools-menu-divider {
        background: rgba(148, 163, 184, 0.22);
    }

    .more-mode-row {
        display: none;
        flex-direction: column;
        gap: 0.35rem;
        width: 100%;
    }

    .page-home .more-mode-row[data-mode="home"],
    .page-ai .more-mode-row[data-mode="ai"],
    .page-play .more-mode-row[data-mode="play"],
    .page-puzzles .more-mode-row[data-mode="puzzles"] {
        display: flex;
    }

    /* No mode actions on destination pages — skip the extra divider */
    .page-more #headerToolsMenu > .board-theme-item + .tools-menu-divider {
        display: none;
    }

    .more-mode-label {
        font-size: 0.72rem;
        font-weight: 600;
        letter-spacing: 0.04em;
        text-transform: uppercase;
        color: var(--color-dark-gray, #6b6358);
        padding: 0 0.15rem;
    }

    [data-theme="dark"] .more-mode-label {
        color: #9aa8b6;
    }

    #headerToolsMenu .tools-menu-item,
    #headerToolsMenu .tools-menu-link {
        width: 100%;
        box-sizing: border-box;
    }

    #headerToolsMenu .tools-menu-link {
        display: flex;
        align-items: center;
        gap: 0.55rem;
        padding: 0.65rem 0.75rem;
        margin: 0.15rem 0;
        border-radius: 12px;
        text-decoration: none;
        color: inherit;
        font-size: 0.92rem;
        font-weight: 600;
        border: 1px solid transparent;
        background: transparent;
    }

    #headerToolsMenu .tools-menu-link .icon-svg {
        width: 1.15rem;
        height: 1.15rem;
        flex-shrink: 0;
        opacity: 0.9;
    }

    #headerToolsMenu .tools-menu-link:hover,
    #headerToolsMenu .tools-menu-link:focus-visible {
        background: rgba(181, 136, 99, 0.12);
        border-color: rgba(181, 136, 99, 0.28);
        outline: none;
    }

    [data-theme="dark"] #headerToolsMenu .tools-menu-link:hover,
    [data-theme="dark"] #headerToolsMenu .tools-menu-link:focus-visible {
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(148, 163, 184, 0.28);
    }

    #moreNewAiGame,
    #morePlayLobby {
        justify-content: center;
        font-weight: 700;
        border-radius: 12px;
        padding: 0.7rem 0.85rem;
        background: var(--color-accent, #b58863);
        border-color: transparent;
        color: #fffdf9;
    }

    #moreNewAiGame:hover,
    #morePlayLobby:hover {
        background: var(--color-accent-dark, #8d6240);
        color: #fffdf9;
    }

    [data-theme="dark"] #moreNewAiGame,
    [data-theme="dark"] #morePlayLobby {
        background: var(--color-accent, #b58863);
        color: #1c1916;
    }
}

@media (min-width: 769px) {
    .mobile-tab-bar,
    .mobile-more-scrim,
    .tools-menu-divider,
    .more-mode-row,
    .tools-menu-link {
        display: none !important;
    }
}