*{box-sizing:border-box;margin:0;padding:0;font-family:Poppins}
body{
background:linear-gradient(135deg,#667eea,#764ba2);
min-height:100vh;
color:white;
}
header{text-align:center;padding:30px}
.container{
padding:20px;
display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:20px;
}
.card{
background:rgba(255,255,255,0.15);
backdrop-filter:blur(12px);
border-radius:18px;
padding:30px;
text-align:center;
text-decoration:none;
color:white;
font-weight:600;
border:1px solid rgba(255,255,255,0.25);
box-shadow:0 8px 30px rgba(0,0,0,0.2);
transition:0.3s;
}
.card:hover{transform:translateY(-6px)}
input,button{
width:100%;
padding:12px;
margin:8px 0;
border-radius:8px;
border:none;
}
button{
background:#4facfe;
color:white;
font-weight:600;
cursor:pointer;
}
.calc{
max-width:500px;
margin:auto;
padding:20px;
}
canvas{margin-top:20px}
footer{text-align:center;padding:20px;opacity:.8}