```css
/* =========================================================
   BULK SMS CALCULATOR
   - Inherit theme / Elementor font
   - Correct two-column layout
   - Correct RTL alignment
   - Complete borders
   - Equal column heights on desktop
   - Preserve original backgrounds
   - Responsive
   ========================================================= */

.bulksms-calculator {
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;

    direction: rtl;

    /* فونت از قالب/المنتور ارث‌بری می‌کند */
    font-family: inherit;
    font-size: inherit;
    line-height: inherit;

    color: inherit;
}

.bulksms-calculator *,
.bulksms-calculator *::before,
.bulksms-calculator *::after {
    box-sizing: border-box;
    font-family: inherit;
}


/* =========================================================
   MAIN LAYOUT
   ========================================================= */

.bulksms-layout {
    width: 100%;
    max-width: 100%;

    display: grid;

    /*
     * 35fr + 65fr
     * باعث می‌شود gap از عرض کلی بیرون نزند.
     */
    grid-template-columns: minmax(0, 35fr) minmax(0, 65fr);

    gap: 30px;

    direction: rtl;

    /*
     * مهم:
     * ارتفاع دو ستون در دسکتاپ برابر می‌شود.
     */
    align-items: stretch;
}


/* =========================================================
   COLUMNS
   ========================================================= */

.bulksms-right-column {
    width: 100%;
    min-width: 0;

    /*
     * در RTL ستون اول Grid سمت راست قرار می‌گیرد.
     */
    grid-column: 1;
    grid-row: 1;

    /*
     * بک‌گراند ستون راست حفظ شده
     */
    background: #f7f8fa;

    border: 1px solid #eeeeee;
    border-radius: 12px;

    padding: 18px;
}

.bulksms-results-area {
    width: 100%;
    min-width: 0;

    grid-column: 2;
    grid-row: 1;

    /*
     * بک‌گراند ستون نتایج حفظ شده
     */
    background: #f7f8fa;

    border: 1px solid #eeeeee;
    border-radius: 12px;

    padding: 18px;
}


/* =========================================================
   COMMON
   ========================================================= */

.bulksms-calculator input,
.bulksms-calculator textarea,
.bulksms-calculator button,
.bulksms-calculator select {
    font-family: inherit;
}


/* =========================================================
   RECIPIENT
   ========================================================= */

.bulksms-recipient-field {
    width: 100%;
    max-width: 100%;

    /* فاصله کمتر بین مخاطبین و پیامک */
    margin: 0 0 8px;
}

.bulksms-recipient-row {
    width: 100%;
    min-width: 0;

    display: flex;
    align-items: center;

    gap: 12px;
}

.bulksms-recipient-row .bulksms-label {
    flex: 0 0 auto;

    width: auto;
    max-width: max-content;

    margin: 0;

    white-space: nowrap;

    font-family: inherit;
    font-size: inherit;
    font-weight: 600;
    line-height: 1.5;
}

.bulksms-recipients {
    flex: 1 1 auto;

    width: 100%;
    min-width: 0;
    max-width: 100%;

    height: 46px;

    padding: 10px 13px;

    border: 1px solid #dcdcdc !important;
    border-radius: 10px !important;

    background: #ffffff !important;
    color: inherit !important;

    font-family: inherit !important;
    font-size: inherit !important;
    font-weight: 400 !important;
    line-height: 1.5;

    direction: ltr;
    text-align: right;

    font-variant-numeric: normal;
    unicode-bidi: plaintext;

    outline: none !important;
    box-shadow: none !important;

    -webkit-appearance: none;
    appearance: none;
}

.bulksms-recipients:focus {
    outline: none !important;

    border: 1px solid #dcdcdc !important;

    box-shadow: none !important;
}

.bulksms-recipient-error {
    width: 100%;
    min-height: 20px;

    margin-top: 6px;

    color: #c62828;

    font-family: inherit;
    font-size: 13px;
    line-height: 1.5;
}


/* =========================================================
   PHONE / MESSAGE
   ========================================================= */

.bulksms-phone,
.bulksms-message-box {
    width: 100%;
    max-width: 100%;
    min-width: 0;
}

.bulksms-message-box {
    position: relative;
}

.bulksms-label {
    display: block;

    width: 100%;

    margin: 0 0 8px;

    color: inherit;

    font-family: inherit;
    font-size: inherit;
    font-weight: 600;
    line-height: 1.5;
}


/* =========================================================
   MESSAGE EDITOR
   ========================================================= */

.bulksms-editor {
    position: relative;

    width: 100%;
    max-width: 100%;
    min-width: 0;

    overflow: hidden;

    border-radius: 10px 10px 0 0;
}


/* =========================================================
   HIGHLIGHT LAYER
   ========================================================= */

.bulksms-highlight {
    position: absolute;
    inset: 0;

    z-index: 1;

    width: 100%;
    max-width: 100%;

    overflow: hidden;

    padding: 13px 14px;

    color: #222222;
    background: #ffffff;

    border: 0 !important;

    border-radius: 10px 10px 0 0;

    font-family: inherit;
    font-size: inherit;
    font-weight: 400;
    line-height: 1.9;

    text-align: right;
    direction: rtl;

    white-space: pre-wrap;

    word-wrap: break-word;
    overflow-wrap: break-word;

    pointer-events: none;
}


/* =========================================================
   ACTUAL TEXTAREA
   ========================================================= */

.bulksms-message-input {
    position: relative;

    z-index: 2;

    display: block;

    width: 100%;
    max-width: 100%;
    min-width: 0;

    /*
     * ارتفاع بیشتر برای جبران فاصله کم‌شده بالا
     */
    height: 242px;

    margin: 0;

    resize: none !important;

    padding: 13px 14px;

    /*
     * متن textarea شفاف است تا highlight دیده شود.
     */
    color: transparent !important;

    caret-color: #222222;

    background: transparent !important;

    border: 1px solid #dcdcdc !important;

    border-radius: 10px 10px 0 0 !important;

    outline: none !important;
    box-shadow: none !important;

    font-family: inherit !important;
    font-size: inherit !important;
    font-weight: 400 !important;
    line-height: 1.9;

    text-align: right;
    direction: rtl;

    white-space: pre-wrap;

    word-wrap: break-word;
    overflow-wrap: break-word;

    overflow-y: auto;
    overflow-x: hidden;
}

.bulksms-message-input:focus {
    outline: none !important;

    border: 1px solid #dcdcdc !important;

    box-shadow: none !important;
}

.bulksms-message-input::placeholder {
    color: #999999 !important;
    opacity: 1;

    font-family: inherit !important;
    font-size: inherit !important;
}


/* =========================================================
   URL HIGHLIGHT
   ========================================================= */

.bulksms-url {
    color: #c62828;

    background: rgba(198, 40, 40, 0.10);

    border-radius: 3px;
}


/* =========================================================
   FIXED SUFFIX
   ========================================================= */

.bulksms-fixed-suffix {
    width: 100%;
    max-width: 100%;
    min-height: 38px;

    display: flex;

    align-items: center;
    justify-content: flex-start;

    gap: 4px;

    padding: 7px 12px;

    margin-top: -1px;

    background: #ffffff;

    border-top: 0 !important;
    border-right: 1px solid #dcdcdc !important;
    border-bottom: 1px solid #dcdcdc !important;
    border-left: 1px solid #dcdcdc !important;

    border-radius: 0 0 10px 10px !important;

    color: #555555;

    font-family: inherit;
    font-size: inherit;
    line-height: 1.5;

    direction: rtl;
}

.bulksms-fixed-enter {
    display: inline-block;

    font-family: inherit;
    font-size: 16px;
    line-height: 1;
}


/* =========================================================
   COUNTER
   ========================================================= */

.bulksms-counter {
    width: 100%;
    max-width: 100%;

    display: flex;

    align-items: center;
    justify-content: space-between;

    gap: 10px;

    margin-top: 10px;

    color: inherit;

    font-family: inherit;
    font-size: 13px;
    line-height: 1.5;
}

.bulksms-pages,
.bulksms-count,
.bulksms-remaining {
    display: inline-block;
}


/* =========================================================
   WARNING
   ========================================================= */

.bulksms-link-warning {
    display: none;

    width: 100%;
    max-width: 100%;

    margin: 0 0 16px;

    padding: 12px 14px;

    border: 1px solid #e3b341;

    border-radius: 10px;

    background: #fff8e1;

    color: #7a5a00;

    font-family: inherit;
    font-size: inherit;
    line-height: 1.7;
}


/* =========================================================
   RESULTS
   ========================================================= */

.bulksms-results {
    display: block !important;
    visibility: visible !important;

    width: 100%;
    max-width: 100%;
    min-width: 0;

    overflow: visible;
}

.bulksms-results h3 {
    width: 100%;

    margin: 0 0 14px;

    font-family: inherit;
    font-size: 18px;
    font-weight: 600;
    line-height: 1.6;
}

.bulksms-results-table-wrap {
    width: 100%;
    max-width: 100%;

    overflow: hidden;

    border: 1px solid #e3e3e3;

    border-radius: 12px;

    background: #ffffff;
}

.bulksms-results table {
    width: 100%;
    max-width: 100%;

    margin: 0;

    border: 0;

    border-collapse: collapse;
    border-spacing: 0;

    background: #ffffff;

    table-layout: fixed;
}

.bulksms-results tbody {
    border: 0;
}

.bulksms-results tr {
    border: 0;
}

.bulksms-results td {
    padding: 13px 15px;

    border: 0;
    border-bottom: 1px solid #eeeeee;

    vertical-align: middle;

    font-family: inherit;
    font-size: inherit;
    line-height: 1.6;
}

.bulksms-results tr:last-child td {
    border-bottom: 0;
}

.bulksms-results td:first-child {
    width: 55%;

    text-align: right;
    direction: rtl;
}

.bulksms-results td:last-child {
    width: 45%;

    text-align: center;
    direction: rtl;

    font-variant-numeric: normal;
}

.bulksms-total td {
    font-weight: 700;
}

.bulksms-total td:last-child {
    font-size: 16px;
}


/* =========================================================
   TABLET
   ========================================================= */

@media (max-width: 1024px) {

    .bulksms-layout {
        grid-template-columns:
            minmax(0, 35fr)
            minmax(0, 65fr);

        gap: 20px;
    }
}


/* =========================================================
   MOBILE
   ========================================================= */

@media (max-width: 767px) {

    .bulksms-layout {
        display: flex;

        flex-direction: column;

        width: 100%;

        gap: 24px;
    }

    .bulksms-right-column,
    .bulksms-results-area {
        width: 100%;
        max-width: 100%;

        grid-column: auto;
        grid-row: auto;

        /*
         * در موبایل ارتفاع آزاد باشد.
         */
        height: auto;
        min-height: 0;

        /*
         * بک‌گراند حفظ می‌شود.
         */
        background: #f7f8fa;

        border: 1px solid #eeeeee;
        border-radius: 12px;

        padding: 15px;
    }

    .bulksms-recipient-row {
        width: 100%;
        gap: 10px;
    }

    .bulksms-recipient-row .bulksms-label {
        white-space: normal;
    }

    .bulksms-message-input {
        height: 210px;
    }

    .bulksms-counter {
        flex-wrap: wrap;
    }

    .bulksms-results h3 {
        font-size: 17px;
    }

    .bulksms-results td {
        padding: 11px 12px;
        font-size: 13px;
    }
}


/* =========================================================
   SMALL MOBILE
   ========================================================= */

@media (max-width: 480px) {

    .bulksms-recipient-row {
        flex-direction: row;

        align-items: center;

        width: 100%;
    }

    .bulksms-recipient-row .bulksms-label {
        width: auto;

        flex: 0 0 auto;

        white-space: nowrap;
    }

    .bulksms-recipients {
        flex: 1 1 auto;

        width: 100%;
        min-width: 0;
    }

    .bulksms-counter {
        display: grid;

        grid-template-columns: 1fr 1fr;

        gap: 7px;
    }

    .bulksms-remaining {
        grid-column: 1 / -1;
    }

    .bulksms-results td:first-child {
        width: 58%;
    }

    .bulksms-results td:last-child {
        width: 42%;
    }
}
```