* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: #f4f7fb;
    color: #222;
}

header {
    background-color: #1565c0;
    color: white;
    text-align: center;
    padding: 40px 20px;
}

main {
    max-width: 800px;
    margin: 40px auto;
    padding: 30px;
    background-color: white;
    border-radius: 12px;
}

form {
    display: flex;
    gap: 10px;
}

input {
    flex: 1;
    min-width: 0;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 6px;
}

button {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    background-color: #1565c0;
    color: white;
    cursor: pointer;
}

#result {
    margin-top: 24px;
}