.workbench {
        padding: 28px 0 8px;
    }

    .pane {
        display: flex;
        flex-direction: column;
        height: 100%;
    }

    .pane-bar {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 8px;
        min-height: 36px;
        margin-bottom: 10px;
    }

    .pane-bar label {
        font-weight: 600;
        margin: 0;
    }

    .pane-area {
        width: 100%;
        height: 250PX;
        resize: none;
        padding: 16px 18px;
        line-height: 1.65;
        border-radius: 12px;
    }

    .pane-area[readonly] {
        background-color: var(--bs-tertiary-bg, #f6f7f9);
        cursor: default;
    }

    .pane-foot {
        display: flex;
        justify-content: space-between;
        gap: 12px;
        margin-top: 8px;
        font-size: .875rem;
        color: #6c757d;
    }

    .pane-lang {
        font-weight: 600;
    }

    .copybtn.is-done {
        background-color: #198754;
        border-color: #198754;
        color: #fff;
    }

    .convert-row {
        margin-top: 12px;
    }

    /* How to use */
    .howto-zone {
        padding: 56px 0 24px;
    }

    .howto-head {
        max-width: 640px;
        margin-bottom: 28px;
    }

    .howto-head p {
        margin: 0;
        color: #6c757d;
    }

    .stepbox {
        height: 100%;
        padding: 22px;
        border: 1px solid var(--bs-border-color, #dee2e6);
        border-radius: 14px;
        background: var(--bs-body-bg, #fff);
    }

    .stepbox-top {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 12px;
    }

    .stepno {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        flex: 0 0 34px;
        width: 34px;
        height: 34px;
        border-radius: 50%;
        background: var(--bs-primary, #0d6efd);
        color: #fff;
        font-weight: 600;
    }

    .stepbox h3 {
        margin: 0;
        font-size: 1.1rem;
    }

    .stepbox p {
        margin: 0;
        color: #6c757d;
    }

    .egbox {
        height: 100%;
        padding: 22px;
        border-radius: 14px;
        background: #fff
    }

    .egbox h3 {
        font-size: 1.1rem;
        margin-bottom: 14px;
    }

    .eg-label {
        display: block;
        margin-bottom: 4px;
        font-size: .875rem;
        font-weight: 600;
        color: #6c757d;
    }

    .eg-text {
        margin: 0 0 14px;
        padding: 10px 12px;
        border-radius: 8px;
        background: var(--bs-body-bg, #fff);
        border: 1px solid var(--bs-border-color, #dee2e6);
        line-height: 1.55;
        word-break: break-word;
    }

    .eg-text:last-child {
        margin-bottom: 0;
    }

    .notelist {
        margin: 0;
        padding: 0;
        list-style: none;
    }

    .notelist li {
        display: flex;
        gap: 10px;
        margin-bottom: 12px;
        color: #6c757d;
    }

    .notelist li:last-child {
        margin-bottom: 0;
    }

    .notelist i {
        color: var(--bs-primary, #0d6efd);
        margin-top: 2px;
    }

    @media (max-width: 991.98px) {
        .workbench {
            padding-top: 20px;
        }

        .pane-area {
            height: 260px;
        }

        .outpane {
            margin-top: 6px;
            scroll-margin-top: 76px;
        }

        .howto-zone {
            padding-top: 40px;
        }
    }

    @media (prefers-reduced-motion: reduce) {
        html {
            scroll-behavior: auto;
        }
    }

    h1 {
        font-size: 23px !important;
    }

    h2 {
        font-size: 21px !important;
    }

    h3 {
        font-size: 18px !important;
    }