/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}
::-webkit-scrollbar-thumb {
    background: var(--rose-gold, #b76e79);
    border-radius: 10px;
}

/* Floating Sparkles Animation */
.sparkle {
    position: absolute;
    width: 6px;
    height: 6px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0 0 10px #fff, 0 0 20px #ffd1dc;
    animation: sparkleFade 3s infinite ease-in-out;
}

@keyframes sparkleFade {
    0%, 100% { opacity: 0; transform: scale(0.3); }
    50% { opacity: 1; transform: scale(1.2); }
}

/* Envelope & Glass Hover Effects */
.envelope-card {
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275), box-shadow 0.4s ease;
}

.envelope-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(255, 117, 140, 0.3);
}