*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    font-family:Arial,Helvetica,sans-serif;
    background:#f5f9ff;
    color:#222;
    line-height:1.7;
}
.hero{
    background:linear-gradient(135deg,#1565C0,#0D47A1);
    color:#fff;
    text-align:center;
    padding:60px 20px;
    box-shadow:0 4px 18px rgba(0,0,0,.18);
}
.logo{
    width:140px;
    height:140px;
    border-radius:50%;
    background:#fff;
    padding:8px;
    margin-bottom:20px;
    box-shadow:0 8px 24px rgba(0,0,0,.25);
}
.hero h1{
    font-size:42px;
    margin-bottom:10px;
}
.tagline{
    font-size:18px;
    opacity:.95;
}
.topnav{
    margin-top:35px;
}
.topnav a{
    display:inline-block;
    margin:6px;
    color:#fff;
    text-decoration:none;
    padding:10px 18px;
    border:1px solid rgba(255,255,255,.35);
    border-radius:30px;
    transition:.3s;
}
.topnav a:hover{
    background:#fff;
    color:#1565C0;
}
main{
    max-width:1200px;
    margin:auto;
    padding:40px 20px;
}
.welcome{
    text-align:center;
    margin-bottom:40px;
}
.welcome h2{
    color:#1565C0;
    margin-bottom:15px;
    font-size:34px;
}
.cards{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
    gap:25px;
}
.card{
    background:#fff;
    border-radius:18px;
    padding:25px;
    box-shadow:0 10px 25px rgba(0,0,0,.08);
    transition:.3s;
}
.card:hover{
    transform:translateY(-8px);
    box-shadow:0 16px 32px rgba(0,0,0,.16);
}
.card h3{
    color:#1565C0;
    margin-bottom:12px;
}
.card p{
    margin-bottom:18px;
}
.card a{
    display:inline-block;
    background:#1565C0;
    color:#fff;
    text-decoration:none;
    padding:10px 18px;
    border-radius:8px;
}
.card a:hover{
    background:#0D47A1;
}
.developer{
    margin-top:50px;
    background:#fff;
    border-radius:18px;
    padding:25px;
    box-shadow:0 10px 25px rgba(0,0,0,.08);
}
footer{
    margin-top:40px;
    background:#0D47A1;
    color:#fff;
    text-align:center;
    padding:20px;
}
@media(max-width:768px){
.hero h1{font-size:32px}
.logo{width:110px;height:110px}
.topnav a{display:block;margin:10px auto;max-width:240px}
.welcome h2{font-size:28px}
}