body {
    font-family: Arial, sans-serif;
    background: #f4f4f4;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.container {
    background: white;
    padding: 40px;
    border-radius: 15px;
    width: 350px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

h1 {
    margin-bottom: 10px;
}

input {
    width: 90%;
    padding: 12px;
    margin: 8px;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
}

button {
    width: 95%;
    padding: 12px;
    margin-top: 15px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
}

button:hover {
    opacity: 0.8;
}

#result {
    margin-top: 25px;
}