/* WallpaperHub — Responsive Bottom Navigation
   Mobile: full-width fixed bar | Tablet/Desktop: centered bar
*/

.bottom-nav,
.bottom-nav * {
    box-sizing: border-box;
}

:root {
    --bottom-nav-height: 64px;
    --bottom-nav-safe: env(safe-area-inset-bottom, 0px);
    --bottom-nav-bg: rgba(255, 255, 255, .97);
    --bottom-nav-border: rgba(225, 229, 236, .9);
    --bottom-nav-text: #7b8495;
    --bottom-nav-active: #1877f2;
    --bottom-nav-active-bg: #edf4ff;
    --bottom-nav-shadow: 0 7px 26px rgba(22, 34, 55, .13);
}

body.has-bottom-nav {
    padding-bottom: calc(82px + var(--bottom-nav-safe));
}

/* Tablet and desktop: centered dock */
.bottom-nav {
    position: fixed;
    z-index: 9999;
    left: 50%;
    right: auto;
    bottom: calc(12px + var(--bottom-nav-safe));
    transform: translateX(-50%);
    width: min(92%, 420px);
    height: var(--bottom-nav-height);
    min-height: var(--bottom-nav-height);
    display: flex;
    flex-direction: row;
    align-items: stretch;
    justify-content: space-around;
    gap: 4px;
    direction: rtl;
    padding: 4px;
    background: var(--bottom-nav-bg);
    border: 1px solid var(--bottom-nav-border);
    border-radius: 18px;
    box-shadow: var(--bottom-nav-shadow);
    -webkit-backdrop-filter: blur(14px) saturate(150%);
    backdrop-filter: blur(14px) saturate(150%);
    isolation: isolate;
}

.bottom-nav .nav-item {
    position: relative;
    flex: 1 1 0;
    min-width: 0;
    min-height: 0;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 4px 2px;
    color: var(--bottom-nav-text);
    background: transparent;
    border: 0;
    border-radius: 13px;
    outline: 0;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
    transition: color .18s ease, background-color .18s ease, transform .18s ease;
}

.bottom-nav .nav-item span {
    display: block;
    flex: 0 0 auto;
    font-size: 22px;
    line-height: 1;
    color: currentColor;
}

.bottom-nav .nav-item p {
    display: block;
    max-width: 100%;
    margin: 0;
    color: currentColor;
    font-family: inherit;
    font-size: 10px;
    line-height: 1.2;
    font-weight: 700;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.bottom-nav .nav-item.active {
    color: var(--bottom-nav-active);
    background: var(--bottom-nav-active-bg);
}

.bottom-nav .nav-item:active {
    transform: scale(.96);
}

.bottom-nav .nav-item:focus-visible {
    outline: 2px solid var(--bottom-nav-active);
    outline-offset: -2px;
}

/* Phones: full width, attached to the bottom edge.
   Physical left/right positioning prevents the RTL 50%-offset bug. */
@media (max-width: 600px) {
    body.has-bottom-nav {
        padding-bottom: calc(76px + var(--bottom-nav-safe));
    }

    .bottom-nav {
        left: 0;
        right: 0;
        bottom: 0;
        transform: none;
        width: 100%;
        max-width: none;
        height: calc(62px + var(--bottom-nav-safe));
        min-height: calc(62px + var(--bottom-nav-safe));
        padding: 3px max(5px, env(safe-area-inset-right, 0px))
                 calc(3px + var(--bottom-nav-safe))
                 max(5px, env(safe-area-inset-left, 0px));
        gap: 2px;
        border-radius: 15px 15px 0 0;
        border-left: 0;
        border-right: 0;
        border-bottom: 0;
    }

    .bottom-nav .nav-item {
        gap: 3px;
        padding: 3px 2px;
        border-radius: 12px;
    }

    .bottom-nav .nav-item span { font-size: 21px; }
    .bottom-nav .nav-item p { font-size: 9px; }
}

/* Extra-small phones */
@media (max-width: 360px) {
    .bottom-nav {
        padding-left: max(3px, env(safe-area-inset-left, 0px));
        padding-right: max(3px, env(safe-area-inset-right, 0px));
        gap: 1px;
    }

    .bottom-nav .nav-item {
        gap: 2px;
        padding-left: 1px;
        padding-right: 1px;
    }

    .bottom-nav .nav-item span { font-size: 20px; }
    .bottom-nav .nav-item p {
        font-size: 8px;
        letter-spacing: -.15px;
    }
}

/* Tablets and wider screens */
@media (min-width: 601px) {
    body.has-bottom-nav {
        padding-bottom: calc(92px + var(--bottom-nav-safe));
    }

    .bottom-nav {
        width: min(92%, 440px);
        bottom: calc(16px + var(--bottom-nav-safe));
    }
}

/* Short landscape screens */
@media (max-height: 500px) and (orientation: landscape) {
    body.has-bottom-nav {
        padding-bottom: calc(62px + var(--bottom-nav-safe));
    }

    .bottom-nav {
        left: 50%;
        right: auto;
        bottom: calc(5px + var(--bottom-nav-safe));
        transform: translateX(-50%);
        width: min(76%, 430px);
        height: 50px;
        min-height: 50px;
        padding: 2px 4px;
        border-radius: 14px;
    }

    .bottom-nav .nav-item {
        flex-direction: row;
        gap: 6px;
    }

    .bottom-nav .nav-item span { font-size: 19px; }
    .bottom-nav .nav-item p { font-size: 9px; }
}

/* Dark theme */
body.dark .bottom-nav {
    --bottom-nav-bg: rgba(18, 22, 38, .96);
    --bottom-nav-border: rgba(150, 158, 196, .22);
    --bottom-nav-text: #aeb5ca;
    --bottom-nav-active: #c2b6ff;
    --bottom-nav-active-bg: rgba(151, 129, 255, .18);
    --bottom-nav-shadow: 0 14px 42px rgba(0, 0, 0, .38);
}

@media (hover: hover) and (pointer: fine) {
    .bottom-nav .nav-item:not(.active):hover {
        color: var(--bottom-nav-active);
        background: rgba(24, 119, 242, .06);
    }
}

@media (prefers-reduced-motion: reduce) {
    .bottom-nav .nav-item { transition: none; }
}

@media (forced-colors: active) {
    .bottom-nav {
        border: 1px solid CanvasText;
        background: Canvas;
    }

    .bottom-nav .nav-item { color: CanvasText; }
    .bottom-nav .nav-item.active { outline: 2px solid Highlight; }
}