.se-checker-container {
    max-width: 650px;
    margin: 30px auto;
    padding: 25px;
    background: #f4f4f4;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0,0,0,0.1);
    font-family: Arial, sans-serif;
    box-sizing: border-box;
}

.se-checker-container h2 {
    text-align: center;
    margin-top: 0;
    margin-bottom: 20px;
    color: #000;
    font-weight: bold;
}

.se-checker-container input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 6px;
    margin-bottom: 15px;
    box-sizing: border-box;
}

.se-checker-container button {
    background: #0073aa;
    color: white;
    padding: 10px 25px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out;
}

.se-checker-container button:hover {
    background: #005177;
}

.se-results {
    margin-top: 20px;
    background: #fff;
    padding: 15px;
    border-radius: 6px;
    border: 1px solid #ddd;
    min-height: 50px;
}

.se-results p {
    margin: 8px 0;
    line-height: 1.6;
}

.se-warning {
    color: #a00;
    font-weight: bold;
}