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

body{
font-family:Arial, Helvetica, sans-serif;
background:#f4f6f9;
display:flex;
justify-content:center;
align-items:center;
min-height:100vh;
padding:40px 20px;
}

.container{
display:flex;
gap:30px;
max-width:1100px;
width:100%;
justify-content:center;
}

.card{
background:#fff;
flex:1;
max-width:320px;
padding:30px;
border-radius:10px;
text-align:center;
box-shadow:0 5px 20px rgba(0,0,0,0.1);
}

.card-header{
padding:8px;
font-size:14px;
font-weight:bold;
border-radius:5px;
margin-bottom:20px;
color:#fff;
}

.free{
background:#ddd;
color:#333;
}

.pro{
background:linear-gradient(90deg,#6bc1ff,#a855f7);
}

.enterprise{
background:linear-gradient(90deg,#ff7a7a,#ffc371);
}

h2{
margin-bottom:10px;
font-size:32px;
}

h2 span{
font-size:16px;
color:#777;
}

.desc{
font-size:14px;
margin-bottom:20px;
color:#666;
}

.btn{
padding:10px 20px;
border:1px solid #ccc;
background:#fff;
cursor:pointer;
border-radius:5px;
margin-bottom:20px;
}

.btn:hover{
background:#2a2f4f;
color:#fff;
border:none;
}

.btn-dark{
background:#2a2f4f;
color:#fff;
border:none;
}

ul{
list-style:none;
text-align:left;
}

li{
margin-bottom:10px;
color:#555;
}

@media(max-width:900px){

.container{
flex-wrap:wrap;
justify-content:center;
}

.card{
flex:1 1 45%;
}

}

@media(max-width:600px){

.container{
flex-direction:column;
align-items:center;
}

.card{
width:100%;
max-width:350px;
}

}