.top-btn {
    box-shadow: 0 4px 10px rgba(255, 193, 7, 0.2); /* Soft warning glow */
    background-color: rgba(108, 117, 125, 0.05); /* Very light grey tint */
}

.top-btn:focus {
    box-shadow: 0 0 0 0.25rem rgba(255, 193, 7, 0.25) !important; /* Warning-colored focus ring */
    outline: none;
}