#mainpic {
    width: 50% ;

}
.btn-outline-dark {
    color: #2C3E50;
    border: 2px solid #2C3E50;
    background: 0 0;
    margin:5px;
}

.portfolio-item {
	margin-top: 50px;
}
.button {
    background-color: #4CAF50; /* Green */
    border: none;
    color: white;
    padding: 16px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 16px;
    margin: 4px 2px;
    -webkit-transition-duration: 0.4s; /* Safari */
    transition-duration: 0.4s;
    cursor: pointer;
}

.button2 {
    background-color: white; 
    color: black; 
    border: 2px solid #4CAF50;
}
.button2:hover {
    background-color: #4CAF50; /* Green */
    color: white;
}