/* --- Glassmorphism Base --- */
.glass-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: #d4af37;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    z-index: 9999;
    transition: all 0.3s ease;
}

.glass-btn:hover {
    transform: scale(1.1);
    background: rgba(212, 175, 55, 0.2);
}

/* --- Positioning --- */
.pos-left { 
    position: fixed; 
    bottom: 40px; 
    left: 40px; 
}

.pos-right-group {
    position: fixed;
    bottom: 40px;
    right: 40px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 9999;
}

/* WhatsApp specific color */
.whatsapp-glass {
    border: 1px solid rgba(37, 211, 102, 0.5);
    color: #25D366;
}

/* Visibility fix for back-to-top */
#back-to-top {
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

#back-to-top.show {
    opacity: 1;
    visibility: visible;
}