*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial,sans-serif;
}
body{
    color:#222;
    line-height:1.6;
}
header{
    background:#ffffff;
    padding:20px 8%;
    display:flex;
    justify-content:space-between;
    align-items:center;
    box-shadow:0 2px 10px rgba(0,0,0,0.08);
    position:sticky;
    top:0;
}
.logo{
    color:#1f7a3d;
    font-size:32px;
    font-weight:bold;
}
nav a{
    margin-left:20px;
    text-decoration:none;
    color:#333;
    font-weight:600;
}
.hero{
    height:90vh;
    background:url('../images/hero.jpg') center/cover;
    display:flex;
    align-items:center;
    justify-content:center;
    text-align:center;
    color:#fff;
    position:relative;
}
.hero::before{
    content:'';
    position:absolute;
    inset:0;
    background:rgba(0,0,0,0.55);
}
.hero-content{
    position:relative;
    max-width:850px;
    z-index:2;
}
.hero h1{
    font-size:60px;
    margin-bottom:20px;
}
.hero p{
    font-size:20px;
    margin-bottom:30px;
}
.btn{
    display:inline-block;
    background:#1f7a3d;
    color:#fff;
    padding:15px 30px;
    text-decoration:none;
    border-radius:8px;
}
.section{
    padding:80px 8%;
}
.grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
    gap:30px;
}
.card{
    padding:30px;
    background:#f5f5f5;
    border-radius:20px;
}
footer{
    background:#111;
    color:#ddd;
    padding:50px 8%;
    text-align:center;
}