.cb-form {
    max-width: 560px;
    margin: 0 auto;
    direction: rtl;
    text-align: right;
    font-family: inherit;
}
/* عناصر فرم به‌صورت پیش‌فرض فونت را ارث نمی‌برند؛ صریحاً از فونت سایت تبعیت کنند. */
.cb-form input,
.cb-form textarea,
.cb-form button,
.cb-form select,
.cb-plan-box strong,
.cb-plan-box em,
.cb-result {
    font-family: inherit !important;
}
.cb-field {
    margin-bottom: 18px;
}
.cb-field > label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}
.cb-field > label span {
    color: #c0392b;
    margin-right: 2px;
}
.cb-form input[type="text"],
.cb-form input[type="tel"],
.cb-form textarea {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #cfd6e0;
    border-radius: 10px;
    font-size: 15px;
    font-family: inherit;
    box-sizing: border-box;
    background: #fff;
}
.cb-form textarea {
    resize: vertical;
}
.cb-form input:focus,
.cb-form textarea:focus {
    outline: none;
    border-color: #13325F;
    box-shadow: 0 0 0 3px rgba(19, 50, 95, .12);
}
.cb-plans {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}
@media (max-width: 520px) {
    .cb-plans { grid-template-columns: 1fr; }
}
.cb-plan {
    cursor: pointer;
    margin: 0;
}
.cb-plan input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}
.cb-plan-box {
    display: flex;
    flex-direction: column;
    gap: 4px;
    align-items: center;
    text-align: center;
    padding: 14px 10px;
    border: 2px solid #cfd6e0;
    border-radius: 12px;
    transition: all .15s ease;
    height: 100%;
    box-sizing: border-box;
}
.cb-plan-box strong { font-size: 15px; }
.cb-plan-box em { font-style: normal; color: #555; font-size: 13px; }
.cb-plan input:checked + .cb-plan-box {
    border-color: #13325F;
    background: rgba(19, 50, 95, .06);
}
.cb-plan input:checked + .cb-plan-box em { color: #13325F; }
.cb-submit {
    width: 100%;
    padding: 14px;
    background: #13325F;
    color: #fff;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    font-family: inherit;
    transition: background .15s ease;
}
.cb-submit:hover { background: #0E2A55; }
.cb-result {
    max-width: 560px;
    margin: 0 auto 20px;
    padding: 16px 18px;
    border-radius: 12px;
    direction: rtl;
    text-align: right;
    font-weight: 600;
}
.cb-success { background: #e8f6ee; color: #15803d; border: 1px solid #bfe6cd; }
.cb-error   { background: #fdeaea; color: #b91c1c; border: 1px solid #f4c7c7; }