```css
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family: Arial, sans-serif;
    background-color:#f4f6f9;
    color:#333;
    line-height:1.6;
}

header{
    background-color:#1f2937;
    color:white;
    text-align:center;
    padding:40px 20px;
}

header h1{
    margin-bottom:10px;
}

header p{
    margin-bottom:15px;
}

nav a{
    color:white;
    text-decoration:none;
    margin:0 15px;
    font-weight:bold;
}

nav a:hover{
    text-decoration:underline;
}

section{
    background:white;
    margin:20px;
    padding:25px;
    border-radius:10px;
    box-shadow:0 2px 8px rgba(0,0,0,0.1);
    transition:0.3s;
}

section:hover{
    transform:translateY(-5px);
}

h2{
    color:#1f2937;
    margin-bottom:15px;
}

img{
    width:160px;
    height:160px;
    border-radius:50%;
    object-fit:cover;
    display:block;
    margin:15px auto;
    border:4px solid #1f2937;
}

ul{
    margin-left:20px;
}

li{
    margin-bottom:8px;
}

#contact p{
    margin-bottom:8px;
}

footer{
    background-color:#1f2937;
    color:white;
    text-align:center;
    padding:15px;
    margin-top:20px;
}
```