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HTML 

              
                <button class="continue-application">
    <div>
        <div class="pencil"></div>
        <div class="folder">
            <div class="top">
                <svg viewBox="0 0 24 27">
                    <path d="M1,0 L23,0 C23.5522847,-1.01453063e-16 24,0.44771525 24,1 L24,8.17157288 C24,8.70200585 23.7892863,9.21071368 23.4142136,9.58578644 L20.5857864,12.4142136 C20.2107137,12.7892863 20,13.2979941 20,13.8284271 L20,26 C20,26.5522847 19.5522847,27 19,27 L1,27 C0.44771525,27 6.76353751e-17,26.5522847 0,26 L0,1 C-6.76353751e-17,0.44771525 0.44771525,1.01453063e-16 1,0 Z"></path>
                </svg>
            </div>
            <div class="paper"></div>
        </div>
    </div>
    Continue Application
</button>

<!-- dribbble - twitter -->
<a class="dribbble" href="https://dribbble.com/ai" target="_blank"><img src="https://cdn.dribbble.com/assets/dribbble-ball-mark-2bd45f09c2fb58dbbfb44766d5d1d07c5a12972d602ef8b32204d28fa3dda554.svg" alt=""></a>
<a class="twitter" target="_blank" href="https://twitter.com/aaroniker_me"><svg xmlns="http://www.w3.org/2000/svg" width="72" height="72" viewBox="0 0 72 72"><path d="M67.812 16.141a26.246 26.246 0 0 1-7.519 2.06 13.134 13.134 0 0 0 5.756-7.244 26.127 26.127 0 0 1-8.313 3.176A13.075 13.075 0 0 0 48.182 10c-7.229 0-13.092 5.861-13.092 13.093 0 1.026.118 2.021.338 2.981-10.885-.548-20.528-5.757-26.987-13.679a13.048 13.048 0 0 0-1.771 6.581c0 4.542 2.312 8.551 5.824 10.898a13.048 13.048 0 0 1-5.93-1.638c-.002.055-.002.11-.002.162 0 6.345 4.513 11.638 10.504 12.84a13.177 13.177 0 0 1-3.449.457c-.846 0-1.667-.078-2.465-.231 1.667 5.2 6.499 8.986 12.23 9.09a26.276 26.276 0 0 1-16.26 5.606A26.21 26.21 0 0 1 4 55.976a37.036 37.036 0 0 0 20.067 5.882c24.083 0 37.251-19.949 37.251-37.249 0-.566-.014-1.134-.039-1.694a26.597 26.597 0 0 0 6.533-6.774z"></path></svg></a>
!

CSS 

              
                .continue-application {
    --color: #fff;
    --background: #404660;
    --background-hover: #3A4059;
    --background-left: #2B3044;
    --folder: #F3E9CB;
    --folder-inner: #BEB393;
    --paper: #FFFFFF;
    --paper-lines: #BBC1E1;
    --paper-behind: #E1E6F9;
    --pencil-cap: #fff;
    --pencil-top: #275EFE;
    --pencil-middle: #fff;
    --pencil-bottom: #5C86FF;
    --shadow: rgba(13, 15, 25, .2);
    border: none;
    outline: none;
    cursor: pointer;
    position: relative;
    border-radius: 5px;
    font-size: 14px;
    font-weight: 500;
    line-height: 19px;
    -webkit-appearance: none;
    -webkit-tap-highlight-color: transparent;
    padding: 17px 29px 17px 69px;
    transition: background .3s;
    color: var(--color);
    background: var(--bg, var(--background));
    & > div {
        top: 0;
        left: 0;
        bottom: 0;
        width: 53px;
        position: absolute;
        overflow: hidden;
        border-radius: 5px 0 0 5px;
        background: var(--background-left);
        .folder {
            width: 23px;
            height: 27px;
            position: absolute;
            left: 15px;
            top: 13px;
            .top {
                left: 0;
                top: 0;
                z-index: 2;
                position: absolute;
                transform: translateX(var(--fx, 0));
                transition: transform .4s ease var(--fd, .3s);
                svg {
                    width: 24px;
                    height: 27px;
                    display: block;
                    fill: var(--folder);
                    transform-origin: 0 50%;
                    transition: transform .3s ease var(--fds, .45s);
                    transform: perspective(120px) rotateY(var(--fr, 0deg));
                }
            }
            &:before,
            &:after,
            .paper {
                content: '';
                position: absolute;
                left: var(--l, 0);
                top: var(--t, 0);
                width: var(--w, 100%);
                height: var(--h, 100%);
                border-radius: 1px;
                background: var(--b, var(--folder-inner));
            }
            &:before {
                box-shadow: 0 1.5px 3px var(--shadow), 0 2.5px 5px var(--shadow), 0 3.5px 7px var(--shadow);
                transform: translateX(var(--fx, 0));
                transition: transform .4s ease var(--fd, .3s);
            }
            &:after,
            .paper {
                --l: 1px;
                --t: 1px;
                --w: 21px;
                --h: 25px;
                --b: var(--paper-behind);
            }
            &:after {
                transform: translate(var(--pbx, 0), var(--pby, 0));
                transition: transform .4s ease var(--pbd, 0s);
            }
            .paper {
                z-index: 1;
                --b: var(--paper);
                &:before,
                &:after {
                    content: '';
                    width: var(--wp, 14px);
                    height: 2px;
                    border-radius: 1px;
                    transform: scaleY(.5);
                    left: 3px;
                    top: var(--tp, 3px);
                    position: absolute;
                    background: var(--paper-lines);
                    box-shadow: 0 12px 0 0 var(--paper-lines), 0 24px 0 0 var(--paper-lines);
                }
                &:after {
                    --tp: 6px;
                    --wp: 10px;
                }
            }
        }
        .pencil {
            height: 2px;
            width: 3px;
            border-radius: 1px 1px 0 0;
            top: 8px;
            left: 105%;
            position: absolute;
            z-index: 3;
            transform-origin: 50% 19px;
            background: var(--pencil-cap);
            transform: translateX(var(--pex, 0)) rotate(35deg);
            transition: transform .4s ease var(--pbd, 0s);
            &:before,
            &:after {
                content: '';
                position: absolute;
                display: block;
                background: var(--b, linear-gradient(var(--pencil-top) 55%, var(--pencil-middle) 55.1%, var(--pencil-middle) 60%, var(--pencil-bottom) 60.1%));
                width: var(--w, 5px);
                height: var(--h, 20px);
                border-radius: var(--br, 2px 2px 0 0);
                top: var(--t, 2px);
                left: var(--l, -1px);
            }
            &:before {
                clip-path: polygon(0 5%, 5px 5%, 5px 17px, 50% 20px, 0 17px);
            }
            &:after {
                --b: none;
                --w: 3px;
                --h: 6px;
                --br: 0 2px 1px 0;
                --t: 3px;
                --l: 3px;
                border-top: 1px solid var(--pencil-top);
                border-right: 1px solid var(--pencil-top);
            }
        }
    }
    &:before,
    &:after {
        content: '';
        position: absolute;
        width: 10px;
        height: 2px;
        border-radius: 1px;
        background: var(--color);
        transform-origin: 9px 1px;
        transform: translateX(var(--cx, 0)) scale(.5) rotate(var(--r, -45deg));
        top: 26px;
        right: 16px;
        transition: transform .3s;
    }
    &:after {
        --r: 45deg;
    }
    &:hover {
        --cx: 2px;
        --bg: var(--background-hover);
        --fx: -40px;
        --fr: -60deg;
        --fd: .15s;
        --fds: 0s;
        --pbx: 3px;
        --pby: -3px;
        --pbd: .15s;
        --pex: -24px;
    }
}

html {
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

* {
    box-sizing: inherit;
    &:before,
    &:after {
        box-sizing: inherit;
    }
}

// dribbble & twitter
body {
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Inter', 'Inter UI', Arial;
    background: #F6F8FF;
    .dribbble {
        position: fixed;
        display: block;
        right: 20px;
        bottom: 20px;
        img {
            display: block;
            height: 28px;
        }
    }
    .twitter {
        position: fixed;
        display: block;
        right: 64px;
        bottom: 14px;
        svg {
            width: 32px;
            height: 32px;
            fill: #1da1f2;
        }
    }
}
!

JS
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