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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f4f8fb;
    color: #333;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: #ffffff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 500px;
    width: 100%;
}

h1 {
    text-align: center;
    margin-bottom: 20px;
    color: #0066cc;
}

label {
    font-weight: bold;
    display: block;
    margin-top: 10px;
    margin-bottom: 5px;
}

select, textarea, button {
    width: 100%;
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
    outline: none;
    margin-bottom: 15px;
    font-size: 1rem;
}

textarea {
    resize: none;
}

button {
    background: #0066cc;
    color: #fff;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s ease;
    border: none;
}

button:hover {
    background: #004999;
}

.output {
    background: #f1f5f9;
    padding: 10px;
    border-radius: 8px;
    min-height: 60px;
    font-family: monospace;
    word-wrap: break-word;
}