/* Modern floating nav card (.index-fab-nav) — homepage, /lucky, /result, /backward */

.index-fab-nav {
    --index-fab-accent: #b91c1c;
    --index-fab-accent-soft: #fef2f2;
    --index-fab-shadow: 0 14px 36px rgba(127, 29, 29, 0.22);
    --index-fab-right: max(1rem, env(safe-area-inset-right, 0px));
    --index-fab-bottom: calc(5.5rem + env(safe-area-inset-bottom, 0px));
    --index-fab-trigger-size: 3.35rem;
    position: fixed;
    right: var(--index-fab-right);
    left: auto;
    bottom: var(--index-fab-bottom);
    z-index: 55;
    display: flex;
    flex-direction: column-reverse;
    align-items: flex-end;
    gap: 0.55rem;
    margin: 0;
    padding: 0;
    width: auto;
    max-width: none;
    pointer-events: none;
}

.index-fab-nav__trigger,
.index-fab-nav__menu.is-visible {
    pointer-events: auto;
}

.index-fab-nav__backdrop {
    position: fixed;
    inset: 0;
    z-index: 54;
    background: rgba(15, 23, 42, 0.38);
    backdrop-filter: blur(3px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.22s ease;
}

.index-fab-nav__backdrop.hidden {
    display: none !important;
}

.index-fab-nav__backdrop.is-visible {
    opacity: 1;
    pointer-events: auto;
}

.index-fab-nav__trigger {
    position: relative;
    z-index: 57;
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--index-fab-trigger-size);
    height: var(--index-fab-trigger-size);
    border: none;
    border-radius: 9999px;
    background: linear-gradient(145deg, #991b1b 0%, #dc2626 52%, #ef4444 100%);
    color: #fff;
    box-shadow: var(--index-fab-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
    touch-action: manipulation;
    pointer-events: auto;
}

.index-fab-nav__trigger.is-active {
    filter: brightness(0.95);
    box-shadow: 0 10px 24px rgba(127, 29, 29, 0.24);
}

.index-fab-nav__trigger:hover {
    filter: brightness(1.05);
    transform: translateY(-1px);
    box-shadow: 0 18px 40px rgba(127, 29, 29, 0.28);
}

.index-fab-nav__trigger:active {
    transform: translateY(0);
}

.index-fab-nav__trigger:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 3px;
}

.index-fab-nav__trigger-icon {
    width: 1.45rem;
    height: 1.45rem;
}

.index-fab-nav__menu {
    position: fixed;
    right: var(--index-fab-right);
    bottom: calc(var(--index-fab-bottom) + var(--index-fab-trigger-size) + 0.55rem);
    z-index: 56;
    display: flex;
    flex-direction: column;
    min-width: 13.5rem;
    max-width: min(17rem, calc(100vw - 2.5rem));
    max-height: calc(
        100dvh
        - env(safe-area-inset-top, 0px)
        - 3.5rem
        - var(--index-fab-bottom)
        - var(--index-fab-trigger-size)
        - 0.55rem
        - 0.35rem
    );
    margin: 0;
    border-radius: 1.15rem;
    border: 1px solid rgba(254, 202, 202, 0.65);
    background: rgba(255, 255, 255, 0.97);
    box-shadow: var(--index-fab-shadow);
    overflow: hidden;
    opacity: 0;
    transform: translateY(0.65rem) scale(0.97);
    transform-origin: bottom right;
    transition: opacity 0.22s ease, transform 0.22s ease;
    pointer-events: none;
}

.index-fab-nav__menu.is-visible {
    opacity: 1;
    transform: translateY(0) scale(1);
    pointer-events: auto;
}

.index-fab-nav__menu.hidden {
    display: none !important;
}

.index-fab-nav__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.65rem 0.85rem 0.55rem;
    background: linear-gradient(135deg, #7f1d1d 0%, #b91c1c 55%, #dc2626 100%);
    color: #fff;
}

.index-fab-nav__head-title {
    font-size: 0.95rem;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.index-fab-nav__head-close {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.85rem;
    height: 1.85rem;
    border: none;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.16);
    color: #fff;
    transition: background 0.15s ease;
    touch-action: manipulation;
}

.index-fab-nav__head-close:hover {
    background: rgba(255, 255, 255, 0.28);
}

.index-fab-nav__head-close-icon {
    width: 1rem;
    height: 1rem;
}

.index-fab-nav__scroll {
    overflow: visible;
    padding: 0.25rem 0;
    flex-shrink: 0;
}

.index-fab-nav__link {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.72rem 0.9rem;
    font-size: 1.0625rem;
    font-weight: 600;
    line-height: 1.3;
    color: #1f2937;
    text-decoration: none;
    transition: background 0.15s ease, color 0.15s ease, padding-left 0.15s ease;
    touch-action: manipulation;
}

.index-fab-nav__link:hover,
.index-fab-nav__link:focus-visible {
    background: var(--index-fab-accent-soft);
    color: #991b1b;
    padding-left: 1rem;
}

.index-fab-nav__dot {
    flex-shrink: 0;
    width: 0.62rem;
    height: 0.62rem;
    border-radius: 9999px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.35);
}

.index-fab-nav__link--news .index-fab-nav__dot {
    width: 1.1rem;
    height: 1.1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.62rem;
    line-height: 1;
    background: #fef2f2 !important;
    box-shadow: inset 0 0 0 1px rgba(185, 28, 28, 0.25);
}

.index-fab-nav__top {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
    padding: 0.78rem 0.9rem;
    font-size: 1rem;
    font-weight: 800;
    color: #fff;
    text-decoration: none;
    background: linear-gradient(135deg, #991b1b 0%, #dc2626 100%);
    transition: filter 0.15s ease;
    touch-action: manipulation;
}

.index-fab-nav__top:hover,
.index-fab-nav__top:focus-visible {
    filter: brightness(1.06);
    color: #fff;
}

.index-fab-nav__top-icon {
    width: 1rem;
    height: 1rem;
}

body.index-fab-nav-open {
    overflow: hidden;
}

@media (max-width: 639px) {
    .index-fab-nav__head {
        padding: 0.55rem 0.8rem 0.48rem;
    }

    .index-fab-nav__head-title {
        font-size: 0.92rem;
    }

    .index-fab-nav__scroll {
        padding: 0.15rem 0;
    }

    .index-fab-nav__link {
        padding: 0.55rem 0.8rem;
        font-size: 1rem;
        gap: 0.62rem;
    }

    .index-fab-nav__top {
        padding: 0.62rem 0.8rem;
        font-size: 0.95rem;
    }
}

@media (min-width: 640px) {
    .index-fab-nav {
        --index-fab-right: max(1.5rem, env(safe-area-inset-right, 0px));
        --index-fab-bottom: 1.5rem;
    }

    .index-fab-nav__menu {
        min-width: 14.5rem;
    }

    .index-fab-nav__link {
        font-size: 1.125rem;
    }
}

@media (min-width: 768px) {
    .index-fab-nav__menu {
        min-width: 14.5rem;
    }
}