body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: #fff;
    padding: 20px;
    text-align: center;
    width:100%;
}

header h1 {
    margin: 0;
}

header p {
    margin: 10px 0 0;
}

.portfolio {
    padding: 20px;
}

.portfolio h2 {
    text-align: center;
    margin-bottom: 20px;
}

.portfolio-items {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
}

.portfolio-item {
    background-color: #fff;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 20px;
    margin: 10px;
    width: 30%;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.portfolio-item h3 {
    margin-top: 0;
}

.portfolio-item p {
    font-size: 14px;
    line-height: 1.6;
}

.portfolio-item a {
    display: inline-block;
    margin-top: 10px;
    padding: 10px 15px;
    background-color: #333;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
}

.portfolio-item a:hover {
    background-color: #555;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px;
    position: fixed;
    width: 100%;
    bottom: 0;
}

@media (max-width:600px){
    .portfolio-items{
        display:grid;
        margin-bottom:64px;
    }
    .portfolio-item{
        width:100%;
    }
}