:root {
    --nav-fab-size: 56px;
    --nav-fab-offset: 20px;
    --nav-fab-radius: 50%;
    --nav-fab-border-width: 2px;
    --nav-fab-bg: rgba(30, 32, 36, 0.95);
    --nav-fab-border: rgba(255, 255, 255, 0.08);
    --nav-fab-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    --nav-fab-glow: 0 0 18px rgba(251, 191, 36, 0.25);
    --nav-fab-icon-size: 22px;
    --nav-fab-icon-stroke: 2;
    --nav-fab-rotation-closed: 0deg;
    --nav-fab-rotation-open: 45deg;
    --nav-fab-overlay-bg: rgba(10, 12, 14, 0.55);
    --nav-fab-overlay-blur: 14px;
    --nav-fab-card-bg: rgba(30, 32, 36, 0.72);
    --nav-fab-card-border: rgba(255, 255, 255, 0.12);
    --nav-fab-card-border-width: 1px;
    --nav-fab-card-radius: 20px;
    --nav-fab-card-padding: 20px;
    --nav-fab-card-shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
    --nav-fab-card-scale-closed: 0.8;
    --nav-fab-card-scale-open: 1;
    --nav-fab-card-width: min(90vw, 360px);
    --nav-fab-grid-columns: 2;
    --nav-fab-grid-track: minmax(0, 1fr);
    --nav-fab-grid-gap: 16px;
    --nav-fab-item-gap: 8px;
    --nav-fab-item-radius: 14px;
    --nav-fab-item-padding: 12px;
    --nav-fab-item-bg: rgba(255, 255, 255, 0.04);
    --nav-fab-item-border: rgba(255, 255, 255, 0.08);
    --nav-fab-item-border-width: 1px;
    --nav-fab-item-hover-bg: rgba(251, 191, 36, 0.12);
    --nav-fab-item-hover-border: rgba(251, 191, 36, 0.3);
    --nav-fab-item-icon-size: 22px;
    --nav-fab-item-label-size: 12px;
    --nav-fab-item-label-color: rgba(255, 255, 255, 0.8);
    --nav-fab-item-label-weight: 600;
    --nav-fab-item-scale-closed: 0.85;
    --nav-fab-item-scale-open: 1;
    --nav-fab-item-hover-scale: 1.06;
    --nav-fab-item-press-scale: 0.96;
    --nav-fab-item-hover-glow: 0 0 18px rgba(251, 191, 36, 0.28);
    --nav-fab-ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --nav-fab-transition: 0.35s;
    --nav-fab-item-transition: 0.3s;
    --nav-fab-stagger: 30ms;
    --nav-fab-z: 1001;
    --nav-fab-overlay-z: 1000;
    --nav-fab-badge-size: 18px;
    --nav-fab-badge-bg: #ef4444;
    --nav-fab-badge-color: #fff;
    --nav-fab-badge-border: #1e2024;
    --nav-fab-badge-border-width: 2px;
    --nav-fab-badge-radius: 999px;
    --nav-fab-badge-font-size: 11px;
    --nav-fab-badge-padding-x: 5px;
    --nav-fab-badge-offset: -6px;
    --nav-fab-badge-pulse: 1.5s;
    --nav-fab-badge-pulse-scale: 1.12;
    --nav-fab-btn-press-scale: 0.96;
}

@media (max-width: 767.98px) {
    .top-navbar .navbar-right .navbar-btn:not(.signin-btn) {
        display: none;
    }
}

.nav-fab {
    position: fixed;
    right: var(--nav-fab-offset);
    bottom: var(--nav-fab-offset);
    z-index: var(--nav-fab-z);
}

.nav-fab-btn {
    width: var(--nav-fab-size);
    height: var(--nav-fab-size);
    border-radius: var(--nav-fab-radius);
    background: var(--nav-fab-bg);
    border: var(--nav-fab-border-width) solid var(--nav-fab-border);
    box-shadow: var(--nav-fab-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: transform var(--nav-fab-transition) var(--nav-fab-ease-spring),
        box-shadow var(--nav-fab-transition) var(--nav-fab-ease-spring),
        border-color var(--nav-fab-transition) var(--nav-fab-ease-spring);
}

.nav-fab-btn svg {
    width: var(--nav-fab-icon-size);
    height: var(--nav-fab-icon-size);
    stroke-width: var(--nav-fab-icon-stroke);
    color: rgba(255, 255, 255, 0.9);
    transition: transform var(--nav-fab-transition) var(--nav-fab-ease-spring);
}

.nav-fab-btn:hover {
    box-shadow: var(--nav-fab-shadow), var(--nav-fab-glow);
    border-color: rgba(251, 191, 36, 0.4);
}

.nav-fab-btn:active {
    transform: scale(var(--nav-fab-btn-press-scale));
}

body.nav-fab-open .nav-fab-btn svg {
    transform: rotate(var(--nav-fab-rotation-open));
}

.nav-fab-overlay {
    position: fixed;
    inset: 0;
    background: var(--nav-fab-overlay-bg);
    backdrop-filter: blur(var(--nav-fab-overlay-blur));
    -webkit-backdrop-filter: blur(var(--nav-fab-overlay-blur));
    opacity: 0;
    pointer-events: none;
    z-index: var(--nav-fab-overlay-z);
    transition: opacity var(--nav-fab-transition) var(--nav-fab-ease-spring);
}

.nav-fab-card {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(var(--nav-fab-card-scale-closed));
    background: var(--nav-fab-card-bg);
    border: var(--nav-fab-card-border-width) solid var(--nav-fab-card-border);
    border-radius: var(--nav-fab-card-radius);
    padding: var(--nav-fab-card-padding);
    box-shadow: var(--nav-fab-card-shadow);
    width: var(--nav-fab-card-width);
    opacity: 0;
    transition: transform var(--nav-fab-transition) var(--nav-fab-ease-spring),
        opacity var(--nav-fab-transition) var(--nav-fab-ease-spring);
}

.nav-fab-grid {
    display: grid;
    grid-template-columns: repeat(var(--nav-fab-grid-columns), var(--nav-fab-grid-track));
    gap: var(--nav-fab-grid-gap);
}

.nav-fab-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--nav-fab-item-gap);
    background: var(--nav-fab-item-bg);
    border: var(--nav-fab-item-border-width) solid var(--nav-fab-item-border);
    border-radius: var(--nav-fab-item-radius);
    padding: var(--nav-fab-item-padding);
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    cursor: pointer;
    font: inherit;
    appearance: none;
    outline: none;
    text-align: center;
    transform: scale(var(--nav-fab-item-scale-closed));
    opacity: 0;
    transition: transform var(--nav-fab-item-transition) var(--nav-fab-ease-spring),
        opacity var(--nav-fab-item-transition) var(--nav-fab-ease-spring),
        box-shadow var(--nav-fab-item-transition) var(--nav-fab-ease-spring),
        border-color var(--nav-fab-item-transition) var(--nav-fab-ease-spring),
        background var(--nav-fab-item-transition) var(--nav-fab-ease-spring);
    transition-delay: 0ms;
}

.nav-fab-item svg {
    width: var(--nav-fab-item-icon-size);
    height: var(--nav-fab-item-icon-size);
    transition: transform var(--nav-fab-item-transition) var(--nav-fab-ease-spring);
}

.nav-fab-item span {
    font-size: var(--nav-fab-item-label-size);
    font-weight: var(--nav-fab-item-label-weight);
    color: var(--nav-fab-item-label-color);
}

.nav-fab-item:hover {
    background: var(--nav-fab-item-hover-bg);
    border-color: var(--nav-fab-item-hover-border);
    transform: scale(var(--nav-fab-item-hover-scale));
    box-shadow: var(--nav-fab-item-hover-glow);
}

.nav-fab-item:active {
    transform: scale(var(--nav-fab-item-press-scale));
}

.nav-fab-item.is-disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

.nav-fab-item.is-disabled:hover {
    background: var(--nav-fab-item-bg);
    border-color: var(--nav-fab-item-border);
    box-shadow: none;
}

.nav-fab-item .notification_badge {
    position: absolute;
    top: var(--nav-fab-badge-offset);
    right: var(--nav-fab-badge-offset);
    min-width: var(--nav-fab-badge-size);
    height: var(--nav-fab-badge-size);
    padding: 0 var(--nav-fab-badge-padding-x);
    background: var(--nav-fab-badge-bg);
    color: var(--nav-fab-badge-color);
    border-radius: var(--nav-fab-badge-radius);
    font-size: var(--nav-fab-badge-font-size);
    font-weight: 700;
    border: var(--nav-fab-badge-border-width) solid var(--nav-fab-badge-border);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: navFabBadgePulse var(--nav-fab-badge-pulse) ease-in-out infinite;
}

.nav-fab-icon-wrap {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: var(--nav-fab-item-icon-size);
    height: var(--nav-fab-item-icon-size);
}

body.nav-fab-open .nav-fab-overlay {
    opacity: 1;
    pointer-events: auto;
}

body.nav-fab-open .nav-fab-card {
    opacity: 1;
    transform: translate(-50%, -50%) scale(var(--nav-fab-card-scale-open));
}

body.nav-fab-open .nav-fab-item {
    opacity: 1;
    transform: scale(var(--nav-fab-item-scale-open));
    transition-delay: calc(var(--fab-index, 0) * var(--nav-fab-stagger));
}

@keyframes navFabBadgePulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(var(--nav-fab-badge-pulse-scale)); }
}

@media (min-width: 768px) {
    .nav-fab,
    .nav-fab-overlay {
        display: block;
    }
}

@media (max-width: 767.98px) {
    body.nav-fab-open {
        overflow: hidden;
    }
}