@media (max-width: 767px) {
    .custom-checkbox-list {
        padding: 14px 10px;
    }

    .workshop-list {
        gap: 8px;
    }

        .workshop-list label {
            font-size: 14px;
            padding: 9px 12px;
        }
        /* KL and scholarship dates in 2 columns */

        .workshop-list span {
            width: calc(50% - 4px);
        }
            /* header full width */

            .workshop-list span:has(input[disabled]) {
                width: 100%;
            }
            /* outstation full width */

            .workshop-list span:has(.outstation-item) {
                width: 100%;
            }
}

.from-wrap {
    width: 100%;
}

    .from-wrap form {
        width: 100%;
        margin: 0 auto;
    }

.placeholder label {
    display: flex;
    align-items: center; /* Align checkbox and text vertically */
    border-radius: 5px; /* Adjust the value as needed */
    background-color: white; /* Optional: Add a background color */
    padding: 10px; /* Optional: Add padding for spacing */
}

.placeholder input[type="checkbox"] {
    display: none; /* Hide the checkbox */
}

    .placeholder input[type="checkbox"] + label:before {
        content: ""; /* Empty content for the before pseudo-element */
        display: inline-block;
        width: 18px;
        height: 18px; /* Adjusted height for better alignment */
        margin-right: 10px;
        margin-left: 5px;
        border: 2px solid #ccc;
        border-radius: 3px;
        background-color: white;
        cursor: pointer;
        margin-top: 3px;
    }

    .placeholder input[type="checkbox"]:checked + label:before {
        content: "\2713"; /* Unicode for tick symbol */
        background-color: #007bff;
        color: white; /* Color of the tick symbol */
    }

    .placeholder input[type="checkbox"] + label:after {
        display: inline-block;
        width: 20px;
        margin-right: 10px;
        text-align: center;
        line-height: 18px; /* Adjusted line-height for better alignment */
        color: #fff;
        visibility: hidden;
    }

    .placeholder input[type="checkbox"]:checked + label:after {
        visibility: visible;
    }

@media (max-width: 600px) {
    .placeholder label {
        display: flex;
        align-items: center;
    }

    .placeholder input[type="checkbox"] + label:before {
        margin-right: 5px;
    }
}

iframe#enquiry {
    width: 100%;
    height: 850px;
    overflow: hidden;
    margin-top: 50px;
}

@media (max-width: 768px) {
    iframe#enquiry {
        width: 100%;
        height: 1300px;
        border: none;
        overflow: hidden;
        margin-top: 50px;
    }
}

@media (min-width: 768px) and (max-width: 1024px) {
    iframe#enquiry {
        width: 100%;
        height: 850px;
        border: none;
        overflow: hidden;
    }
}
<!--

.validator1 {
    position: absolute;
    margin-top: 5px;
    font-size: 14px;
    margin-left: 10px;
    margin-top: 25px;
}
-->

.custom-checkbox-list {
    width: 96% !important;
    margin: 10px 1% !important;
    font-size: 13px !important;
    border: 1px solid #DDDDDD !important;
    padding: 20px;
    background-color: #F7F7F9;
    border-radius: 6px;
}

    .custom-checkbox-list input[type="checkbox"] {
        margin-right: 5px;
    }

@media (max-width: 600px) {
    .custom-checkbox-list {
        width: 96% !important;
    }
}
<!--

.validator {
    position: absolute;
    margin-top: -5px;
    font-size: 13px; /*margin-left: 50px;*/
    margin-top: 0;
}
--> <!--

.validator2 {
    position: absolute;
    margin-top: -5px;
    font-size: 13px;
    margin-left: 100px;
    margin-top: 0;
}
-->

.Isprogramme, .full-name, .contact-number, .email, .interested, .IsMalaysian, .nationality, .workshop, .intake, .country, .custom-select {
    width: 47% !important;
    margin: 10px 1% 10px 1% !important;
    height: 45px !important;
    padding: 5px !important;
    text-align: left !important;
}

@media (min-width: 1024px) and (max-width: 1280px) {
    .from-wrap input[type="text"],
    .from-wrap input[type="email"],
    .from-wrap select {
        margin-left: 16px !important;
    }
}


@media (min-width: 667px) {
    .from-wrap input[type="text"],
    .from-wrap input[type="email"],
    .from-wrap select {
        margin-left: 0 !important;
    }
}

.interested1 {
    color: #252525;
    font-family: Roboto;
    font-size: 16px;
    font-style: normal;
    font-weight: 400;
    line-height: 150%;
    width: 97% !important;
    margin: 10px 1% 10px 1% !important;
    font-size: 13px !important;
    height: 45px !important;
    padding: 5px !important;
    border: none; /*border: 1px solid #797979 !important;*/
    text-align: left !important;
    border-radius: 5px;
    border-bottom: 2px solid rgba(0, 0, 0, 0.12);
    font-weight: 800;
    margin-right: 30px !important;
}

.form-check-label {
    font-size: 14px;
}

.btn-group {
    display: initial;
}

.submit {
    width: 96.5%;
    margin: 10px 1%;
    height: 40px;
    border: 0;
    font-size: 14px;
    background: #b70d0d;
    color: #FFFFFF;
    transition: all 0.25s ease;
    cursor: pointer;
}
    /* hover */

    .submit:hover {
        background: #8f0a0a !important; /* darker */
        transform: translateY(-1px); /* naik sikit */
    }
    /* click effect */

    .submit:active {
        transform: translateY(0);
    }

.submit {
    cursor: pointer;
}

#txtBestFriendName, #TextBox1 {
    display: none;
}

.tnc {
    font-weight: 400;
    font-size: 80%;
    text-align: center;
    margin-bottom: 70px;
}

.iam-wrap {
    display: flex;
    align-items: center;
    gap: 28px;
    flex-wrap: wrap;
    margin: 30px 1% 10px 20px;
}

.iam-label {
    margin: 8px 0 0 0;
    color: #252525;
    font-family: "Roboto", sans-serif;
    font-size: 16px;
    font-weight: 700;
    line-height: 150%;
}

    .iam-label strong {
        font-weight: 700;
    }

        .iam-label strong::after {
            content: "";
        }

.iam-radio-list {
    margin: 0;
}
    /* WebForms RadioButtonList biasanya render table */

    .iam-radio-list table, .iam-radio-list tbody, .iam-radio-list tr {
        display: flex;
        align-items: center;
        gap: 56px;
        margin: 0;
        padding: 0;
    }

    .iam-radio-list td {
        display: flex;
        align-items: center;
        padding: 0;
        margin: 0;
        white-space: nowrap;
    }
    /* radio bulat */

    .iam-radio-list input[type="radio"] {
        appearance: none;
        -webkit-appearance: none;
        width: 16px;
        height: 16px;
        border: 2px solid #4a4a4a;
        border-radius: 50%;
        background: #fff;
        margin: 0 14px 0 0;
        position: relative;
        cursor: pointer;
        flex-shrink: 0;
    }

        .iam-radio-list input[type="radio"]:checked::after {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 8px;
            height: 8px;
            background: #ca1d23;
            border-radius: 50%;
            transform: translate(-50%, -50%);
        }

    .iam-radio-list label {
        margin: 0;
        color: #252525;
        font-family: "Roboto", sans-serif;
        font-size: 16px;
        font-weight: 400;
        line-height: 150%;
        cursor: pointer;
    }

.validator2 {
    display: block;
    width: 100%;
    margin-top: 6px;
    color: #ca1d23;
    font-size: 13px;
}
/* mobile */

@media (max-width: 767.98px) {
    .iam-wrap {
        gap: 14px;
    }

    .iam-label {
        width: 100%;
        font-size: 16px;
    }

    .iam-radio-list table, .iam-radio-list tbody, .iam-radio-list tr {
        gap: 24px;
        flex-wrap: wrap;
    }

    .iam-radio-list input[type="radio"] {
        width: 16px;
        height: 16px;
        margin-right: 10px;
    }

        .iam-radio-list input[type="radio"]:checked::after {
            width: 10px;
            height: 10px;
        }

    .iam-radio-list label {
        font-size: 16px;
    }
}

.chkValid {
    position: absolute;
    top: -9999px;
    left: -9999px;
}

.checkbox-list-container {
    width: 100%;
    margin: 0 auto;
    column-count: 2;
    column-gap: 20px;
}

    .checkbox-list-container ul {
        padding: 0;
        list-style-type: none;
    }

    .checkbox-list-container li {
        display: flex;
        align-items: flex-start;
        margin-bottom: 10px;
        padding-left: 20px;
        position: relative;
    }

    .checkbox-list-container input[type="checkbox"] {
        margin-right: 10px;
    }

    .checkbox-list-container li::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 20px;
        height: 100%;
    }
/* Full width rows */

.row-form, .custom-checkbox-list, .submit, .tnc {
    grid-column: 1 / -1;
}
/* ===== INPUT FIELDS ===== */

.from-wrap input[type="text"], .from-wrap input[type="email"], .from-wrap select {
    border: 1px solid #dcdcdc;
    border-radius: 6px;
    background: #F7F7F9;
    font-size: 16px !important;
    outline: none;
    transition: all 0.2s ease;
    margin-right: 25px !important;
    color: black;
    font-family: Roboto;
    font-weight: 400;
    line-height: 150%;
   
}

/* Desktop besar */
@media (min-width: 1300px) {
  .from-wrap input[type="text"],
  .from-wrap input[type="email"],
  .from-wrap select {
    margin-left: 10px !important;
  }
}

/* Laptop / kecil */
@media (max-width: 1290px) {
  .from-wrap input[type="text"],
  .from-wrap input[type="email"],
  .from-wrap select {
    margin-left: 5px !important;
  }
}
}


.full-name::placeholder, .contact-number::placeholder, .email::placeholder {
    color: #000;
    opacity: 1;
}
/* Chrome, Safari */

.full-name::-webkit-input-placeholder, .contact-number::-webkit-input-placeholder, .email::-webkit-input-placeholder {
    color: #000;
}
/* IE */

.full-name:-ms-input-placeholder, .contact-number:-ms-input-placeholder, .email:-ms-input-placeholder {
    color: #000;
}
/* Focus style */

.from-wrap input:focus, .from-wrap select:focus {
    border-color: #c8102e;
    background: #ffffff;
}
/* ===== RADIO BUTTON (I AM) ===== */

#isCountry {
    display: flex;
    gap: 20px;
    margin-top: 8px;
}

    #isCountry input {
        margin-right: 6px;
    }
/* ===== WORKSHOP LAYOUT ===== */

.workshop-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
    /* hide default checkbox */

    .workshop-list input[type="checkbox"] {
        display: none;
    }
    /* checkbox buttons */

    .workshop-list label:not(.workshop-header) {
        padding: 10px 10px;
        border: 1px solid #d9d9d9;
        border-radius: 6px;
        background: #ffffff;
        cursor: pointer;
        font-size: 14px;
        transition: all 0.2s ease;
        display: flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 8px;
    }

.date-form {
    margin-left: 10px;
    margin-bottom: -35px;
    color: #252525;
    font-family: Roboto;
    font-size: 16px;
    font-style: normal;
    font-weight: 700;
    line-height: 150%; /* 24px */
}
/* selected checkbox */

.workshop-list input[type="checkbox"]:checked + label {
    border: 1px solid #CA1D23;
    color: #e60023;
    font-weight: 400;
    background: #FFF3F3;
}
/* header disable styling */

.workshop-list input[type="checkbox"]:disabled + label {
    background: none !important;
    border: none !important;
    color: #252525;
    font-family: Roboto;
    font-size: 15px;
    font-style: normal;
    font-weight: 700;
    line-height: 150%; /* 24px */
    display: block;
    cursor: default;
    margin-bottom: -10px;
    margin-top: -20px;
}
/* section headers */

.workshop-list .workshop-header {
    width: 100%;
    font-weight: 700;
    margin-bottom: 8px;
    background: none !important;
    border: none !important;
    padding: 0 !important;
    display: block;
}
/* optional: style outstation differently */

.workshop-list .outstation-item + label {
    font-style: italic;
}
/* ===== VALIDATION ===== */

.validator {
    color: red;
    font-size: 12px;
}

.validator1 {
    color: #252525;
    font-family: Roboto;
    font-size: 16px;
    font-style: normal;
    font-weight: 400;
    line-height: 150%; /* 24px */
}

.validator2 {
    margin-top: 6px;
}
/* ===== MOBILE RESPONSIVE ===== */

@media(max-width:768px) {
    .from-wrap form {
        grid-template-columns: 1fr;
    }
}
/* Default: all horizontal */

.workshop-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 7px;
    margin-left: 10px;
}

    .workshop-list input[type="checkbox"] {
        margin: 0;
        flex-shrink: 0;
    }

    .workshop-list label {
        display: inline-block;
        margin: 0;
        line-height: 1.4;
    }

.workshop-header {
    flex-basis: 100%;
    font-weight: bold;
    margin-top: 8px;
}

@media (max-width: 768px) {
    .checkbox-list-container {
        column-count: 1;
    }
}

.custom-checkbox-list {
    width: 96% !important;
    margin: 10px 1% !important;
    border: 1px solid #dddddd !important;
    padding: 16px;
    background-color: #f7f7f9;
    border-radius: 6px;
}

.workshop-list {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 8px;
    width: 100%;
}

    .workshop-list span {
        display: inline-block;
    }

    .workshop-list input[type="checkbox"] {
        display: none;
    }

    .workshop-list label {
        display: inline-block;
        padding: 9px 14px;
        border: 1px solid #d9d9d9;
        border-radius: 4px;
        background: #ffffff;
        cursor: pointer;
        font-size: 14px;
        line-height: 1.4;
        margin: 0;
        color: #444;
    }

    .workshop-list input[type="checkbox"]:checked + label {
        border: 1px solid #CA1D23;
        color: #CA1D23;
        background: #FFF3F3;
    }
    /* header */

    .workshop-list input[type="checkbox"]:disabled + label {
        display: block;
        width: 100%;
        background: transparent !important;
        border: none !important;
        padding: 0;
        margin: 14px 0 6px 0;
        font-size: 15px;
        font-weight: 700;
        color: #252525;
        cursor: default;
    }

    .workshop-list span:first-child input[type="checkbox"]:disabled + label {
        margin-top: 0;
    }
/* mobile */

@media (max-width: 767px) {
    .workshop-list span {
        width: calc(50% - 4px);
    }

    .workshop-list label {
        width: 100%;
        font-size: 14px;
        padding: 9px 12px;
    }
    /* header full width */

    .workshop-list span:has(input[disabled]) {
        width: 100%;
    }
    /* outstation full width */

    .workshop-list span:has(input.outstation-item) {
        width: 100%;
    }
}

@media (max-width: 767px) {
    .workshop-list {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
    }

        .workshop-list span {
            width: calc(50% - 4px);
            display: inline-block;
        }

        .workshop-list label {
            width: 80%;
            font-size: 14px;
            padding: 9px 12px;
            box-sizing: border-box;
        }
        /* header full width */

        .workshop-list span.workshop-header {
            width: 100%;
        }

            .workshop-list span.workshop-header label {
                width: 100%;
            }
        /* outstation full width */

        .workshop-list span.outstation-item {
            width: 100%;
        }

            .workshop-list span.outstation-item label {
                width: 100%;
            }
}

@media (max-width: 767px) {
    .Isprogramme, .full-name, .contact-number, .email, .interested, .IsMalaysian, .nationality, .workshop, .intake, .country, .custom-select {
        color: grey !important;
        width: 97% !important;
        margin: 10px 1% 10px 1% !important;
        font-size: 13px !important;
        height: 45px !important;
        padding: 5px !important;
        border: none; /*border: 1px solid #797979 !important;*/
        text-align: left !important;
        border-radius: 5px;
        border-bottom: 2px solid rgba(0, 0, 0, 0.12);
        font-weight: 800;
        margin-right: 18px !important;
    }
}

.contact-form,
.contact-form * {
  cursor: default !important;
}

.contact-form input,
.contact-form textarea {
  cursor: text !important;
}

.contact-form button,
.contact-form select,
.contact-form label {
  cursor: pointer !important;
}