body {
    font-family: Arial, sans-serif;
    background: #1a1a2e;
    color: #fff;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    margin: 0;
}

main.container {
    background: #16213e;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 15px #0f3460;
    width: 300px;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
}

form {
    display: flex;
    flex-direction: column;
}

fieldset {
    border: none;
    padding: 0;
    margin: 0 0 15px 0;
    display: flex;
    flex-direction: column;
}

legend {
    font-weight: bold;
    margin-bottom: 10px;
}

input {
    padding: 8px;
    margin-top: 10px;
    border: none;
    border-radius: 5px;
}

label {
    margin-top: 5px;
    font-size: 0.95rem;
}

button {
    width: 100%;
    padding: 10px;
    margin-top: 10px;
    background: #0f3460;
    color: #fff;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

button:hover {
    background: #1a75ff;
}

.output {
    margin-top: 15px;
    display: flex;
    gap: 10px;
    align-items: center;
}