body {
    font-family: Arial, sans-serif;
    background: #f4f6f8;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    width: 350px;
    text-align: center;
}

h1 {
    margin-bottom: 20px;
    color: #333;
}

input, select {
    width: 100%;
    padding: 10px;
    margin: 8px 0;
    border-radius: 5px;
    border: 1px solid #ccc;
}

button {
    width: 100%;
    padding: 10px;
    background: #0066ff;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background: #004ec2;
}

#result {
    margin-top: 15px;
    font-weight: bold;
}