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

body {
    font-family: 'Arial', sans-serif;
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

.container {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    text-align: center;
    width: 100%;
    max-width: 400px;
}

h1 {
    font-size: 28px;
    color: #333;
    margin-bottom: 20px;
}

.form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input, select, button {
    padding: 12px;
    font-size: 16px;
    border: 1px solid #ccc;
    border-radius: 6px;
    outline: none;
}

input:focus, select:focus, button:focus {
    border-color: #4CAF50;
}

button {
    background-color: #4CAF50;
    color: white;
    cursor: pointer;
    font-weight: bold;
}

button:hover {
    background-color: #45a049;
}

#loading {
    display: none;
    font-size: 16px;
    color: #666;
    margin-top: 20px;
}

#error {
    color: red;
    font-size: 14px;
    margin-top: 20px;
}

#result {
    margin-top: 20px;
    font-size: 18px;
    font-weight: bold;
    color: #333;
}

@media (max-width: 600px) {
    .container {
        padding: 20px;
    }

    h1 {
        font-size: 24px;
    }
}