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

body{
    font-family:Arial, sans-serif;
    background:#f5f7fa;
    color:#222;
    line-height:1.6;
}

img{
    max-width:100%;
    display:block;
}

.container{
    width:100%;
    max-width:1200px;
    margin:auto;
    padding:0 20px;
}

.section{
    padding:80px 0;
}

.btn{
    display:inline-block;
    padding:14px 28px;
    border-radius:8px;
    text-decoration:none;
    transition:0.3s ease;
}

.btn-primary{
    background:#28a745;
    color:#fff;
}

.btn-primary:hover{
    background:#1e7e34;
}