#floating-nav {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;

    display: flex;
    gap: 12px;
    padding: 14px 20px;

    background: var(--background-glass);
    backdrop-filter: blur(16px) saturate(180%);
    -webkit-backdrop-filter: blur(16px) saturate(180%);
    border: 1px solid var(--card-border);
    border-radius: 50px;
    box-shadow: var(--shadow-md), 0 0 40px rgba(var(--accent-primary-rgb), 0.1);

    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.4s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

#floating-nav.docked {
    transform: translateX(-50%) translateY(20px) scale(0.9);
    box-shadow: var(--shadow-sm);
}

#floating-nav a {
    color: var(--text-tertiary);
    font-size: 1.3rem;
    padding: 10px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    position: relative;
    transition: color 0.3s ease, background 0.3s ease;
    will-change: transform;
}

#floating-nav a:hover,
#floating-nav a.active {
    color: var(--text-primary);
    background: var(--background-glass-light);
    transform: translateY(-4px);
}

#floating-nav a[data-tooltip] {
    position: relative;
}

#floating-nav a[data-tooltip]::before,
#floating-nav a[data-tooltip]::after {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#floating-nav a[data-tooltip]::before {
    content: attr(data-tooltip);
    bottom: calc(100% + 10px);
    background-color: var(--background-light);
    color: var(--text-primary);
    padding: 6px 12px;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--card-border);
}

#floating-nav a[data-tooltip]::after {
    content: '';
    bottom: calc(100% + 5px);
    border-width: 5px;
    border-style: solid;
    border-color: var(--background-light) transparent transparent transparent;
}

#floating-nav a[data-tooltip]:hover::before,
#floating-nav a[data-tooltip]:hover::after {
    opacity: 1;
    transform: translateX(-50%) translateY(-5px);
}

#hamburger-btn {
    display: none;
}

.mobile-nav-menu {
    display: none;
}

/* --- Header Responsive --- */
@media (max-width: 768px) {
    #floating-nav {
        display: none;
    }

    #hamburger-btn {
        display: block;
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 1001;
        background: var(--background-glass);
        color: var(--text-primary);
        border: 1px solid var(--card-border);
        border-radius: 50%;
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        cursor: pointer;
    }

    .mobile-nav-menu {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: var(--background-dark);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        z-index: 1000;
    }

    .mobile-nav-menu.active {
        display: flex;
    }

    .mobile-nav-menu a {
        color: var(--text-primary);
        font-size: 2rem;
        margin: 1rem 0;
        text-decoration: none;
    }
}

@media (max-width: 480px) {
    #floating-nav {
        gap: 5px;
        padding: 8px 10px;
    }

    #floating-nav a {
        font-size: 1.1rem;
        width: 36px;
        height: 36px;
    }
}