body {
    font-family: Arial, sans-serif;
    background: #ffffff;
    color: #222;
    margin: 0;
}

.container {
    max-width: 500px;
    margin: 40px auto;
    padding: 20px;
}

h1 {
    font-size: 28px;
    line-height: 1.3;
}

p {
    color: #555;
}

label {
    display: block;
    margin-top: 18px;
    margin-bottom: 6px;
}

input {
    width: 100%;
    padding: 12px;
    font-size: 16px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 5px;
}

button {
    width: 100%;
    margin-top: 25px;
    padding: 14px;
    font-size: 16px;
    background: #222;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    opacity: 0.85;
}

#result {
    margin-top: 30px;
    padding: 20px;
    border: 1px solid #ddd;
    border-radius: 5px;
}