body {
    margin:0;
    font-family: Arial;
    background: linear-gradient(135deg, #667eea, #764ba2);
    color:white;
    text-align:center;
}

.container {
    padding:20px;
}

.card {
    background:white;
    color:black;
    padding:20px;
    border-radius:15px;
    margin:20px auto;
    width:300px;
    box-shadow:0 10px 25px rgba(0,0,0,0.2);
}

button {
    padding:10px 15px;
    margin:5px;
    border:none;
    border-radius:10px;
    background:#667eea;
    color:white;
    cursor:pointer;
    font-weight:bold;
}

button:hover {
    background:#5a67d8;
}

input {
    padding:10px;
    border-radius:10px;
    border:1px solid #ccc;
    margin:5px;
    width:80%;
}

canvas {
    border:2px solid black;
    margin-top:15px;
    background:white;
}