body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f4f7f6;
    display: flex;
    justify-content: center;
    padding-top: 50px;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 500px;
}

h1 { color: #2c3e50; font-size: 1.5rem; margin-bottom: 1.5rem; }

.form-group { margin-bottom: 1rem; }

label { display: block; font-weight: bold; margin-bottom: 0.3rem; color: #555; }

input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    box-sizing: border-box; /* Ensures padding doesn't break width */
}

button {
    width: 100%;
    padding: 12px;
    background-color: #008CBA;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
}

button:hover { background-color: #007399; }

.output-box {
    margin-top: 1rem;
    padding: 15px;
    background: #e9ecef;
    border-radius: 4px;
    min-height: 50px;
    word-wrap: break-word;
    font-family: monospace;
    font-size: 0.9rem;
}

.error { color: #a94442; background: #f2dede; border: 1px solid #ebccd1; }
.success { color: #3c763d; background: #dff0d8; border: 1px solid #d6e9c6; }

.source-info {
    margin-top: 2rem;
    padding-top: 1rem;
    border-top: 1px solid #eee;
    font-size: 0.65rem; /* Small font size */
    color: #777;
    line-height: 1.4;
}

.source-info a {
    color: #008CBA;
    text-decoration: none;
}

.source-info a:hover {
    text-decoration: underline;
}

.source-info p {
    margin: 4px 0;
}