.xcore-tool {
    border: 1px solid #ddd;
    padding: 20px;
    margin: 20px 0;
    border-radius: 10px;
    background: #fafafa;
    max-width: 420px;
}

.xcore-tool input, .xcore-tool select {
    display: block;
    margin: 10px 0;
    padding: 8px;
    width: 100%;
}

.xcore-tool button {
    background: #000;
    color: #fff;
    border: none;
    padding: 10px 15px;
    cursor: pointer;
    border-radius: 6px;
}