#boardContactWrite .line-cube-wrap {
    position: fixed;
}

#header[mode="scroll"]~#boardContactWrite .line-cube-wrap {
    filter: blur(3px);
}

#contactForm {
    counter-reset: tit-num;

    --input-border: #666;
    --input-border-radius: 0;
    --input-padding: 0 5px;
    --input-font-size: 24px;
    --input-height: 45px;
    --label-font-size: 20px;

    --placeholder-font-size: var(--input-font-size);
    --placeholder-color: #aaa;
    --form-group-gap: 60px;
}

#contactForm input,
#contactForm .dropdown .dropdown-select-button {
    background-color: transparent;
    border: none;
    border-bottom: 1px solid var(--input-border);
    color: var(--color-text);
}

#contactForm .contact-sec {
    display: flex;
    gap: 15vw;
}

#contactForm .contact-sec~.contact-sec {
    margin-top: 200px;
}

#contactForm .contact-sec .title::before {
    content: "STEP " counter(tit-num, decimal-leading-zero);
    counter-increment: tit-num;
    display: block;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 8px;
}

#contactForm .contact-sec .input-wrap {
    flex: 1;
}

#contactForm .contact-sec .input-grid {
    gap: var(--form-group-gap) 50px;
}

#contactForm .form-group>.input {
    margin-top: 15px;
}

#contactForm input[type="radio"]+label.radio-btn {
    background: transparent;
    border-width: 2px;
    padding: 10px 25px;
}

#contactForm input[type="radio"]:checked+label.radio-btn p {
    color: var(--color-primary);
}

#contactForm textarea {
    display: block;
    height: 300px;
    background-color: transparent;
    border: 1px solid var(--input-border);
    color: var(--color-text);
    padding: 25px;
}

#contactForm .file-upload-box {
    row-gap: 15px;
}

#contactForm .file-upload-box .upload-label .upload-label-btn.btn {
    --btn-font-size: 17px;
    --btn-height: 55px;
    min-width: 150px;
    background-color: transparent;
}

#contactForm .file-upload-box .upload-label .upload-label-btn.block-upload {
    border: 1px solid var(--input-border);
    color: #999;
}

#contactForm .upload-preview .preview-file-box.active .remove-file::after {
    filter: invert(1);
}

#contactForm .form-group .helper-text,
#contactForm .upload-area .helper-text {
    margin-left: 5px;
    margin-top: 12px;
    font-size: 14px !important;
}

#contactForm input[type="checkbox"]:not(:checked)+label.agreement-check {
    border: 2px solid #fff;
    background: transparent;
}

#contactForm input[type="checkbox"]:checked+label..agreement-check {
    border-color: var(--color-primary);
}

#boardBox #writeBox .board-button-box {
    margin-top: 120px;
}

/* focus effect */
#contactForm .form-group .input {
    position: relative;
}

#contactForm .form-group .input:not(.text-area):after {
    content: '';
    display: block;
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: 0.4s;
}

#contactForm .form-group.focused .input:not(.text-area)::after {
    width: 100%;
    left: 0;
}

#contactForm .form-group label.label {
    color: #999;
}

#contactForm .form-group.focused label.label {
    color: #fff;
}

#contactForm textarea~.focus-border:before,
#contactForm textarea~.focus-border:after {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 0;
    height: 1px;
    background-color: var(--color-primary);
    transition: 0.15s;
    transition-delay: 0.15s;
}

#contactForm textarea~.focus-border:after {
    top: auto;
    bottom: 0;
    right: auto;
    left: 0;
    transition-delay: 0.6s;
}

#contactForm textarea~.focus-border i:before,
#contactForm textarea~.focus-border i:after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 1px;
    height: 0;
    background-color: var(--color-primary);
    transition: 0.15s;
}

#contactForm textarea~.focus-border i:after {
    left: auto;
    right: 0;
    top: auto;
    bottom: 0;
    transition-delay: 0.4s;
}

#contactForm textarea:focus~.focus-border:before,
#contactForm textarea:focus~.focus-border:after {
    width: 100%;
    transition: 0.15s;
    transition-delay: 0.6s;
}

#contactForm textarea:focus~.focus-border:after {
    transition-delay: 0.15s;
}

#contactForm textarea:focus~.focus-border i:before,
#contactForm textarea:focus~.focus-border i:after {
    height: 100%;
    transition: 0.15s;
}

#contactForm textarea:focus~.focus-border i:after {
    transition-delay: 0.4s;
}

/* Desktop ( 1024px ~)*/
@media all and (min-width: 1024px) {}

/* Laptop ( 1024px ~ 1440px)*/
@media all and (min-width: 1024px) and (max-width: 1440px) {}

/* Tablet ( 768px ~ 1023px)*/
@media all and (min-width: 768px) and (max-width: 1023px) {
    #contactForm {
        --input-font-size: 20px;
        --input-height: 40px;
        --label-font-size: 18px;
    }

    #contactForm .contact-sec~.contact-sec {
        margin-top: 160px;
    }

    #contactForm textarea {
        height: 250px;
        padding: 20px;
    }

    #boardBox #writeBox .board-button-box {
        margin-top: 120px;
    }

    #boardBox #writeBox .board-button-box .btn {
        min-width: 220px;
    }
}

/* Mobile ( ~ 767px)*/
@media all and (max-width: 767px) {

    #contactForm {
        --input-font-size: 15px;
        --input-height: 30px;
        --label-font-size: 16px;

        --form-group-gap: 40px;
    }

    #contactForm .contact-sec {
        flex-direction: column;
    }

    #contactForm .contact-sec~.contact-sec {
        margin-top: 100px;
    }

    #contactForm .form-group .flex-wrap {
        gap: 10px;
    }

    #contactForm input[type="radio"]+label.radio-btn {
        padding: 8px 18px;
    }

    #contactForm textarea {
        height: 250px;
        padding: 15px;
    }

    #contactForm .upload-area {
        --remove-btn-size: 15px;
    }

    #contactForm .file-upload-box {
        row-gap: 20px;
    }

    #contactForm .file-upload-box .upload-label .upload-label-btn.btn {
        --btn-font-size: 15px;
        --btn-height: 45px;
        min-width: 100px;
    }

    #contactForm .upload-preview .preview-file-box.active {
        background: transparent;
        border: 1px solid var(--input-border);
    }

    #contactForm .form-group .helper-text,
    #contactForm .upload-area .helper-text {
        font-size: 12px !important;
    }

    #contactForm input[type="checkbox"]:not(:checked)+label.agreement-check {
        border: 2px solid #fff;
        background: transparent;
    }

    #contactForm input[type="checkbox"]:checked+label.agreement-check {
        border-color: var(--color-primary);
    }

    #contactForm input[type="checkbox"]+label.agreement-check+label p {
        font-size: 14px;
        font-size: clamp(14px, 3.75vw, 18px);
    }

    #boardBox #writeBox .board-button-box {
        margin-top: 80px;
    }

    #boardBox #writeBox .board-button-box .btn {
        min-height: 55px;
        width: unset;
        min-width: 190px;
        font-size: 17px;
    }
}