stylesheet.css

/* Reset CSS */
*{
    margin: 0;
    padding: 0;
}
body{
    font-family: Arial, Helvetica, sans-serif;
}
li{
    list-style: none;
}
li:hover{
    background-color: rgba(0, 0, 0, 0.5);
}

/* Header */
header{
    background-color: #0e78be;
    color: #ffffff;
    height: 90px;
}
.header-logo{
    float: left;
    font-size: 36px;
    padding: 20px 40px ;
}
.header-nav li{
    float: left;
    padding: 35px 20px ;
}

/* MAIN / CONTENT */
main{
    padding: 100px 80px;
}
.main-container h1{
    font-size: 95px;
}
.main-container h2{
    font-size: 60px;
}
.main-container span{
    color: #d40909;
}

/* Contents */
.contents{
    height: 500px;
    margin-top: 100px;
}
.section-title{
    border-bottom: 2px solid #cecece;
    font-size: 28px;
    padding-bottom: 15px;
    margin-bottom: 50px;
}
.contents-item{
    float: left;
    margin-right: 40px;
}
.contents-img{
    width: 220px;
    height: 220px;
    padding: 10px;
    background-color: aquamarine;
}
.contents-img.htmlcss{
    background-color: white;
}
.contents-img.php{
    background-color: aqua;
}
.contents-img.java{
    background-color: lime;
}
.contents-img.python{
    background-color: orchid;
}
.contents-img img{
    width: 220px;
}
.contents-item p{
    font-size: 24px;
    margin-top: 30px;
}

/* Contact */
.contact{
    padding-top: 100px;
}
input, textarea{
    width: 400px;
    margin-top: 10px;
    margin-bottom: 30px;
    padding: 20px;
    font-size: 18px;
    border: 1px solid #cecece;
}.contact-submit{
    background-color: #059605;
    color: #ffffff;
    cursor: pointer;
}
.txt-red{
    color: #d40909;
}
.contact span{
    color: #d40909;
}

/* Footer */
footer{
    background-color: #2f5167;
    color: #ffffff;
    padding: 20px 40px;
    height: 30px;

}
.footer-logo {
    float: left;
    font-size: 30px;
}
.footer-nav {
    float: right;
}

.footer-nav li {
    padding: 10px 20px;
    float: left;
}