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

body{
background:#042354;
display:flex;
justify-content:center;
align-items:center;
height:100vh;
}

.container{
background:white;
padding:30px;
border-radius:12px;
width:600px;
text-align:center;
}

input{
width:100%;
padding:10px;
margin:10px 0;
border-radius:6px;
border:1px solid #ddd;
}

button{
width:100%;
padding:12px;
background:#2563eb;
border:none;
color:white;
border-radius:6px;
cursor:pointer;
}

button:hover{
background:#1d4ed8;
}

#heatmap{
display:grid;
grid-template-columns:repeat(7,1fr);
gap:5px;
margin-top:20px;
}

.cell{
width:60px;
height:60px;
border-radius:6px;
}