body {
    font-family: 'Segoe UI', Arial, sans-serif;
    margin: 2em;
    background: #181c20;
    color: #e0e6ed;
}
h1 {
    color: #60ab31;
    letter-spacing: 1px;
    margin-bottom: 0.5em;
}
form {
    background: #23272b;
    padding: 2.5em 2em;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(20, 30, 40, 0.25);
    max-width: 90vw;
    width: 90vw;
    margin: 0 0 2em 0;
    box-sizing: border-box;
}
textarea {
    width: 100%;
    max-width: 100%;
    height: 20vh;
    padding: 1em;
    border: 1px solid #38404a;
    border-radius: 6px;
    font-size: 1.1em;
    resize: vertical;
    background: #23272b;
    color: #e0e6ed;
    margin: 0 0 1em 0;
    box-sizing: border-box;
    display: block;
}
button[type="submit"] {
    background: #60ab31;
    color: #fff;
    border: none;
    padding: 0.7em 2em;
    border-radius: 6px;
    font-size: 1em;
    cursor: pointer;
    transition: background 0.2s;
}
button[type="submit"]:hover {
    background: #285185;
}
.output {
    margin-top: 1em;
    padding: 1.5em;
    background: #23272b;
    border-radius: 8px;
    max-width: 90vw;
    width: 90vw;
    margin: 0 0 2em 0;
    box-shadow: 0 1px 4px rgba(20, 30, 40, 0.15);
    color: #e0e6ed;
    box-sizing: border-box;
}
.output h3 {
    margin-top: 0;
    color: #6cb6ff;
}