body {
    background: #181818;
    color: #f1f1f1;
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 0;
    min-height: 100vh;
}

.container {
    max-width: 400px;
    margin: 80px auto;
    background: #222;
    padding: 32px 24px;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.7);
    text-align: center;
}

h1 {
    margin-bottom: 24px;
    font-size: 1.6em;
    color: #fff;
}

input[type="text"] {
    width: 100%;
    padding: 12px;
    border: none;
    border-radius: 6px;
    margin-bottom: 18px;
    background: #333;
    color: #f1f1f1;
    font-size: 1em;
}

button {
    padding: 10px 28px;
    border: none;
    border-radius: 6px;
    background: #0d1117;
    color: #fff;
    font-size: 1em;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover {
    background: #21262d;
}

.result {
    margin-top: 24px;
    background: #181818;
    padding: 12px;
    border-radius: 6px;
    color: #a3e635;
    font-size: 1.1em;
}