*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:Arial, sans-serif;
}


body{
    background:#f2f5f9;
}


header{
    background:#2563eb;
    color:white;
    padding:20px;
    display:flex;
    justify-content:space-between;
    align-items:center;
}


#menuBtn{
    display:none;
    background:white;
    border:none;
    padding:10px;
    font-size:20px;
}


nav{
    background:#111827;
    display:flex;
    justify-content:center;
    gap:20px;
    padding:15px;
}


nav a{
    color:white;
    text-decoration:none;
    padding:10px 20px;
    border-radius:8px;
}


nav a:hover{
    background:#2563eb;
}


#content{
    width:90%;
    max-width:900px;
    margin:40px auto;
}


.card{
    background:white;
    padding:30px;
    border-radius:15px;
    box-shadow:0 5px 20px #ddd;
    text-align:center;
}


.card h2{
    margin-bottom:15px;
}


.card button{
    margin-top:20px;
    padding:12px 25px;
    border:none;
    background:#2563eb;
    color:white;
    border-radius:8px;
    cursor:pointer;
}


.hidden{
    display:none;
}


footer{
    text-align:center;
    padding:20px;
    background:#111827;
    color:white;
}



/* Mobile Responsive */

@media(max-width:600px){

header h1{
    font-size:20px;
}


#menuBtn{
    display:block;
}


nav{
    display:none;
    flex-direction:column;
    text-align:center;
}


nav.active{
    display:flex;
}


nav a{
    width:100%;
}


.card{
    padding:20px;
}

}