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

body{
    font-family:Arial, Helvetica, sans-serif;
    background:#f6f7fb;
    color:#222;
    line-height:1.7;
}

nav{
    background:#121212;
    color:white;
    padding:18px 40px;

    display:flex;
    justify-content:space-between;
    align-items:center;
}

nav h1{
    font-size:28px;
}

nav a{
    color:white;
    text-decoration:none;
}

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

.about-container{
    max-width:900px;
    margin:50px auto;
    padding:0 20px;
}

.about-container h2{
    margin-bottom:35px;
    font-size:36px;
}

.about-card{
    background:white;
    padding:25px;
    border-radius:10px;
    margin-bottom:25px;
    box-shadow:0 2px 8px rgba(0,0,0,.08);
}

.about-card h3{
    margin-bottom:15px;
}

.about-card p{
    margin-bottom:16px;
}

.github-btn{
    display:inline-block;
    margin-top:10px;
    background:#121212;
    color:white;
    text-decoration:none;
    padding:10px 18px;
    border-radius:6px;
    transition:.2s;
}

.github-btn:hover{
    background:#333;
}