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HTML

              
                <link href="https://fonts.googleapis.com/css?family=DM+Sans:400,500,700&display=swap" rel="stylesheet">
<div class="app-container">
  <div class="left-area">
    <button class="btn-close-left">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-x-circle" viewBox="0 0 24 24">
        <defs/>
        <circle cx="12" cy="12" r="10"/>
        <path d="M15 9l-6 6M9 9l6 6"/>
      </svg>
    </button>
    <div class="app-name">MyDocs</div>
    <a href="#" class="item-link active" id="pageLink">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-grid" viewBox="0 0 24 24">
        <defs />
        <path d="M3 3h7v7H3zM14 3h7v7h-7zM14 14h7v7h-7zM3 14h7v7H3z" />
      </svg>
    </a>
    <a href="#" class="item-link" id="pageLink">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-folder" viewBox="0 0 24 24">
        <defs />
        <path d="M22 19a2 2 0 01-2 2H4a2 2 0 01-2-2V5a2 2 0 012-2h5l2 3h9a2 2 0 012 2z" />
      </svg>
    </a>
    <a href="#" class="item-link" id="pageLink">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-hard-drive" viewBox="0 0 24 24">
        <defs />
        <path d="M22 12H2M5.45 5.11L2 12v6a2 2 0 002 2h16a2 2 0 002-2v-6l-3.45-6.89A2 2 0 0016.76 4H7.24a2 2 0 00-1.79 1.11zM6 16h.01M10 16h.01" />
      </svg>
    </a>
    <a href="#" class="item-link" id="pageLink">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-settings" viewBox="0 0 24 24">
        <defs />
        <circle cx="12" cy="12" r="3" />
        <path d="M19.4 15a1.65 1.65 0 00.33 1.82l.06.06a2 2 0 010 2.83 2 2 0 01-2.83 0l-.06-.06a1.65 1.65 0 00-1.82-.33 1.65 1.65 0 00-1 1.51V21a2 2 0 01-2 2 2 2 0 01-2-2v-.09A1.65 1.65 0 009 19.4a1.65 1.65 0 00-1.82.33l-.06.06a2 2 0 01-2.83 0 2 2 0 010-2.83l.06-.06a1.65 1.65 0 00.33-1.82 1.65 1.65 0 00-1.51-1H3a2 2 0 01-2-2 2 2 0 012-2h.09A1.65 1.65 0 004.6 9a1.65 1.65 0 00-.33-1.82l-.06-.06a2 2 0 010-2.83 2 2 0 012.83 0l.06.06a1.65 1.65 0 001.82.33H9a1.65 1.65 0 001-1.51V3a2 2 0 012-2 2 2 0 012 2v.09a1.65 1.65 0 001 1.51 1.65 1.65 0 001.82-.33l.06-.06a2 2 0 012.83 0 2 2 0 010 2.83l-.06.06a1.65 1.65 0 00-.33 1.82V9a1.65 1.65 0 001.51 1H21a2 2 0 012 2 2 2 0 01-2 2h-.09a1.65 1.65 0 00-1.51 1z" />
      </svg>
    </a>
    <button class="btn-logout">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-log-out" viewBox="0 0 24 24">
        <defs/>
        <path d="M9 21H5a2 2 0 01-2-2V5a2 2 0 012-2h4M16 17l5-5-5-5M21 12H9"/>
      </svg>
    </button>
  </div>
  <div class="main-area">
    <button class="btn-show-right-area">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-chevron-left"><polyline points="15 18 9 12 15 6"/></svg>
    </button>
    <button class="btn-show-left-area">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round"><line x1="3" y1="12" x2="21" y2="12"/><line x1="3" y1="6" x2="21" y2="6"/><line x1="3" y1="18" x2="21" y2="18"/></svg>
    </button>
    <div class="main-area-header">
      <div class="search-wrapper" id="searchLine">
      <input class="search-input" type="text" placeholder="e.g. files.doc">
      <svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-search" viewBox="0 0 24 24">
        <defs/>
        <circle cx="11" cy="11" r="8"/>
        <path d="M21 21l-4.35-4.35"/>
      </svg>
    </div>
    </div>
    <section class="content-section">
      <h1 class="section-header">Quick Access</h1>
      <div class="access-links">
        <div class="access-link-wrapper">
          <div class="access-icon">
            <svg xmlns="http://www.w3.org/2000/svg" width="56" height="56" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="feather feather-image">
              <rect x="3" y="3" width="18" height="18" rx="2" ry="2"/>
              <circle cx="8.5" cy="8.5" r="1.5"/>
              <polyline points="21 15 16 10 5 21"/>
            </svg>
          </div>
          <span class="access-text">Images</span>
        </div>
        <div class="access-link-wrapper">
          <div class="access-icon">
            <svg xmlns="http://www.w3.org/2000/svg" width="56" height="56" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="feather feather-music">
              <path d="M9 18V5l12-2v13"/>
              <circle cx="6" cy="18" r="3"/>                   <circle cx="18" cy="16" r="3"/>
            </svg>
          </div>
          <span class="access-text">Music</span>
        </div>
        <div class="access-link-wrapper">
          <div class="access-icon">
            <svg xmlns="http://www.w3.org/2000/svg" width="56" height="56" viewBox="0 0 24 24" fill="currentColor" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="feather feather-play">
              <polygon points="5 3 19 12 5 21 5 3"/>
            </svg>
          </div>
          <span class="access-text">Video</span>
        </div>
        <div class="access-link-wrapper">
          <div class="access-icon">
            <svg xmlns="http://www.w3.org/2000/svg" width="56" height="56" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="feather feather-align-left">
              <line x1="17" y1="10" x2="3" y2="10"/>
              <line x1="21" y1="6" x2="3" y2="6"/>
              <line x1="21" y1="14" x2="3" y2="14"/>
              <line x1="17" y1="18" x2="3" y2="18"/>
            </svg>
          </div>
          <span class="access-text">Docs</span>
        </div>
        <div class="access-link-wrapper">
          <div class="access-icon">
            <svg xmlns="http://www.w3.org/2000/svg" width="56" height="56" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="feather feather-layers">
              <polygon points="12 2 2 7 12 12 22 7 12 2"/>
              <polyline points="2 17 12 22 22 17"/>
              <polyline points="2 12 12 17 22 12"/>
            </svg>
          </div>
          <span class="access-text">Apps</span>
        </div>
        <div class="access-link-wrapper">
          <div class="access-icon">
            <svg xmlns="http://www.w3.org/2000/svg" width="56" height="56" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1" stroke-linecap="round" stroke-linejoin="round" class="feather feather-arrow-down-circle">
              <circle cx="12" cy="12" r="10"/>
              <polyline points="8 12 12 16 16 12"/>
              <line x1="12" y1="8" x2="12" y2="16"/>
            </svg>
          </div>
          <span class="access-text">Download</span>
        </div>
      </div>
    </section>
    <section class="content-section">
       <div class="section-header-wrapper">
         <h1 class="section-header">Preview</h1>
         <a class="section-header-link">
           View in folders
         </a>
       </div>
      <div class="content-section-line">
        <div class="section-part left">
          <a class="image-wrapper">
            <div class="image-overlay">
              <div class="video-info">
                <div class="video-info-text">
                  <p class="video-name medium">Happiness & Tears</p>
                  <p class="video-subtext medium">45.5 MB</p>
                </div>
                <button class="btn-play"></button>
            </div>
            </div>
            <img src="https://images.unsplash.com/photo-1492691527719-9d1e07e534b4?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2251&q=80"/>
            <span class="video-time">10:32</span>
          </a>
        </div>
        <div class="section-part right">
          <div class="content-part-line">
            <a class="image-wrapper">
              <div class="image-overlay">
              <div class="video-info">
              <div class="video-info-text">
                <p class="video-name tiny">High Hopes</p>
                <p class="video-subtext tiny">50 MB</p>
              </div>
            </div>
            </div>
            <img src="https://images.unsplash.com/photo-1515552726023-7125c8d07fb3?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2167&q=80"/>
              <span class="video-time">02:35</span>
          </a>
            <a class="image-wrapper">
              <div class="image-overlay">
              <div class="video-info">
              <div class="video-info-text">
                <p class="video-name tiny">Imaginery you</p>
                <p class="video-subtext tiny">210.2 MB</p>
              </div>
            </div>
            </div>
              <img src="https://images.unsplash.com/photo-1542359649-31e03cd4d909?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2167&q=80"/>
              <span class="video-time">04:15</span>
            </a>
          </div>
        </div>
      </div>
    </section>
    <section class="content-section">
      <div class="section-header-wrapper">
        <h1 class="section-header">Recent Files</h1>
        <a class="section-header-link">
          View all files
        </a>
      </div>
      <div class="files-table">
        <div class="files-table-header">
          <div class="column-header table-cell">Name</div>
          <div class="column-header table-cell size-cell">Size</div>
          <div class="column-header table-cell">Last Modified</div>
          <div class="column-header table-cell">Action</div>
        </div>
        <div class="files-table-row">
          <div class="table-cell name-cell pdf">Brandenburg.pdf</div>
          <div class="table-cell">42 MB</div>
          <div class="table-cell">Aug 26, 2020</div>
          <div class="table-cell action-cell">
            <button class="more-action"></button>
          </div>
        </div>
        <div class="files-table-row">
          <div class="table-cell name-cell jpg">TheLionsRoar.jpg</div>
          <div class="table-cell size-cell">500 KB</div>
          <div class="table-cell">Aug 26, 2020</div>
          <div class="table-cell action-cell">
            <button class="more-action"></button>
          </div>
        </div>
      </div>
    </section>
  </div>
  <div class="right-area">
    <button class="btn-close-right">
      <svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" stroke="currentColor" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" class="feather feather-x-circle" viewBox="0 0 24 24">
        <defs/>
        <circle cx="12" cy="12" r="10"/>
        <path d="M15 9l-6 6M9 9l6 6"/>
      </svg>
    </button>
    <div class="right-area-header-wrapper">
      <p class="right-area-header">Downloads</p>
      <button class="more-action"></button>
    </div>
    <div class="download-item-line">
      <div class="line-header">Today</div>
      <div class="download-area">
        <div class="download-item-icon">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="">
            <defs></defs>
            <circle cx="256" cy="256" r="256" fill="#4b50dd"></circle>
            <path fill="#f5f5f5" d="M192 64h176c4.4 0 8 3.6 8 8v328c0 4.4-3.6 8-8 8H120c-4.4 0-8-3.6-8-8V148l80-84z"></path>
            <path fill="#e6e6e6" d="M184 148c4.4 0 8-3.6 8-8V64l-80 84h72z"></path>
            <circle cx="352" cy="384" r="52" fill="#2179a6"></circle>
            <g fill="#f5f5f5" class="g">
              <path d="M352 416c-2.208 0-4-1.788-4-4v-56c0-2.212 1.792-4 4-4s4 1.788 4 4v56c0 2.212-1.792 4-4 4z"></path>
              <path d="M352 416a3.989 3.989 0 01-2.828-1.172l-20-20c-1.564-1.564-1.564-4.092 0-5.656s4.092-1.564 5.656 0L352 406.344l17.172-17.172c1.564-1.564 4.092-1.564 5.656 0s1.564 4.092 0 5.656l-20 20A3.989 3.989 0 01352 416z"></path>
            </g>
          </svg>
        </div>
        <div class="download-item-texts">
          <p class="download-text-header">Glitter.mp4</p>
          <p class="download-text-info">34.45 MB<span>Waiting for download</span></p>
        </div>
        <div class="download-icon">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 612 612">
            <defs/>
            <path d="M403.939 295.749l-78.814 78.833V172.125c0-10.557-8.568-19.125-19.125-19.125s-19.125 8.568-19.125 19.125v202.457l-78.814-78.814c-7.478-7.478-19.584-7.478-27.043 0-7.478 7.478-7.478 19.584 0 27.042L289.208 431c4.59 4.59 10.863 6.005 16.812 4.953 5.929 1.052 12.221-.382 16.811-4.953l108.19-108.19c7.478-7.478 7.478-19.583 0-27.042-7.498-7.478-19.604-7.478-27.082-.019zM306 0C137.012 0 0 136.992 0 306s137.012 306 306 306 306-137.012 306-306S475.008 0 306 0zm0 573.75C158.125 573.75 38.25 453.875 38.25 306S158.125 38.25 306 38.25 573.75 158.125 573.75 306 453.875 573.75 306 573.75z"/>
          </svg>
        </div>
      </div>
    </div>
    <div class="download-item-line">
      <div class="line-header">Yesterday</div>
      <div class="download-area">
        <div class="download-item-icon">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512" class="">
            <defs></defs>
            <circle cx="256" cy="256" r="256" fill="#4bc0dd"></circle>
            <path fill="#f5f5f5" d="M192 64h176c4.4 0 8 3.6 8 8v328c0 4.4-3.6 8-8 8H120c-4.4 0-8-3.6-8-8V148l80-84z"></path>
            <path fill="#e6e6e6" d="M184 148c4.4 0 8-3.6 8-8V64l-80 84h72z"></path>
            <circle cx="352" cy="384" r="52" fill="#2179a6"></circle>
            <g fill="#f5f5f5" class="g">
              <path d="M352 416c-2.208 0-4-1.788-4-4v-56c0-2.212 1.792-4 4-4s4 1.788 4 4v56c0 2.212-1.792 4-4 4z"></path>
              <path d="M352 416a3.989 3.989 0 01-2.828-1.172l-20-20c-1.564-1.564-1.564-4.092 0-5.656s4.092-1.564 5.656 0L352 406.344l17.172-17.172c1.564-1.564 4.092-1.564 5.656 0s1.564 4.092 0 5.656l-20 20A3.989 3.989 0 01352 416z"></path>
            </g>
          </svg>
        </div>
        <div class="download-item-texts">
          <p class="download-text-header">Glitter.mp4</p>
          <div class="progress-bar">
            <span class="progress"></span>
          </div>
        </div>
        <div class="download-icon">
          <svg xmlns="http://www.w3.org/2000/svg" viewBox="1 1 512 512">
            <defs/>
            <path d="M256 512C114.613 512 0 397.383 0 256S114.613 0 256 0s256 114.613 256 256c-.168 141.316-114.684 255.832-256 256zm0-480C132.29 32 32 132.29 32 256s100.29 224 224 224 224-100.29 224-224c-.133-123.656-100.344-223.867-224-224zm0 0"/>
            <path d="M208 368c-8.836 0-16-7.164-16-16V160c0-8.836 7.164-16 16-16s16 7.164 16 16v192c0 8.836-7.164 16-16 16zm0 0M304 368c-8.836 0-16-7.164-16-16V160c0-8.836 7.164-16 16-16s16 7.164 16 16v192c0 8.836-7.164 16-16 16zm0 0"/>
          </svg>
        </div>
      </div>
    </div>
    <div class="right-area-header-wrapper">
      <p class="right-area-header">File Received</p>
    </div>
    <div class="received-item-line">
      <div class="progress-line">
        <span class="time start">15:30</span>
        <span class="time end">18:30</span>
      </div>
      <div class="received-items-content">
        <div class="received-files">
          <div class="image-wrapper">
          <img src="https://images.unsplash.com/photo-1523987355523-c7b5b0dd90a7?ixlib=rb-1.2.1&auto=format&fit=crop&w=2250&q=80"/>
        </div>
        <div class="image-wrapper">
          <img src="https://images.unsplash.com/photo-1498855926480-d98e83099315?ixlib=rb-1.2.1&ixid=eyJhcHBfaWQiOjEyMDd9&auto=format&fit=crop&w=2250&q=80"/>
        </div>
        <div class="image-wrapper">
          <img src="https://images.unsplash.com/photo-1492648272180-61e45a8d98a7?ixlib=rb-1.2.1&auto=format&fit=crop&w=2250&q=80"/>
        </div>
        </div>
        <div class="received-files-info">
          Received <span class="info-purple">3 images</span> total  <span class="info-purple">50.3 MB</span>
        </div>
      </div>
    </div>
  </div>
</div>
              
            
!

CSS

              
                * {
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

html, body {
  width: 100%;
  height: 100vh;
  margin: 0;
}

body {
  font-family: 'DM Sans', sans-serif;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  overflow: hidden;
  overflow-x: hidden;
  //background-image: url("https://images.unsplash.com/photo-1497541271502-639c540968b6?ixlib=rb-1.2.1&auto=format&fit=crop&w=2250&q=80");
  background-image: linear-gradient(to top, #a3bded 0%, #6991c7 100%);
  background-position: center;
  background-size: cover;
  padding: 20px;
}

:root {
  --dark-font: #0f0f10;
  --light-font: #79798c;
}

a { text-decoration: none; cursor: pointer; }

.app-container {
  position: relative;
  border-radius: 10px;
  width: 100%;
  height: 100%;
  max-width: 1200px;
  max-height: 900px;
  background: linear-gradient(180deg, rgba(224,233,253,1) 0%, rgba(233,236,241,1) 90%);
  box-shadow: 0 0 0 10px rgba(255, 255, 255,.4);
  display: flex;
  overflow: hidden;
}

.left-area {
  padding: 32px;
  flex-basis: 1 0 132px;
  background-color: rgba(255, 255, 255,.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  //transition: all cubic-bezier(0.25, 0.1, 0.28, 1.54) .5s;
  transition: all 300ms cubic-bezier(0.190, 1.000, 0.560, 1.000);
  position: relative;
  overflow: auto;
  
  &.show {
    transform: translateX(0);
    opacity: 1;
  }
}

.app-name {
  font-weight: 700;
  font-size: 16px;
  line-height: 24px;
  color: var(--dark-font);
  margin-bottom: 32px;
}

.item-link {
  color: var(--light-font);
  margin-bottom: 32px;
  transition: .2s;
  
  &.active {
    color: var(--dark-font);
  }
}

.btn-logout {
  border: none;
  background-color: transparent;
  color: var(--light-font);
  margin-top: auto;
  cursor: pointer;
  transition: .2s;
  
  &:hover {
    color: var(--dark-font);
  }
}

.main-area {
  flex: 1;
  height: 100%;
  overflow-y: auto;
  background: linear-gradient(97deg, rgba(242,247,253,1) 0%, rgba(240,244,253,1) 90%);
  border-radius: 0 10px 10px 0;
  padding-bottom: 24px;
  position: relative;
}

.main-area-header {
  padding:24px 40px;
  background: linear-gradient(97deg, rgba(242,247,253,1) 0%, rgba(240,244,253,1) 90%);
}

.search-wrapper {
  border-radius: 4px;
  background-color: #fff;
  padding-right: 12px;
  height: 40px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--light-font);
  box-shadow: 0 2px 6px 0 rgba(136,148,171,.2),0 24px 20px -24px rgba(71,82,107,.1);
  overflow: hidden;
}

.search-input {
  border: none;
  flex: 1;
  outline: none;
  height: 100%;
  padding: 0 12px;
  font-size: 12px;
}


.right-area {
  flex-basis: 300px;
  flex-grow: 0;
  background: linear-gradient(180deg, rgba(224,233,253,1) 0%, rgba(233,236,241,1) 90%);
  transition: all 300ms cubic-bezier(0.190, 1.000, 0.560, 1.000);
  
  &.show {
    transform: translateX(0);
    width: 100%;
    opacity: 1;
  }
}

.content-section {
  display: block;
  margin-top: 32px;
  overflow-x: hidden;
  padding: 0 40px;
}

.section-header {
  font-size: 24px;
  line-height: 32px;
  margin-bottom: 16px;
  
  &-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
  }
  
  &-link {
    display: block;
    font-size: 12px;
    line-height: 16px;
    color: #8683d6;
  }
}

.access-links {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  margin: 0 -8px;
}

.access-icon {
  width: 100%;
  height: 100%;
  border-radius: 12px;
  padding: 20px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  
  svg {
    width: 36px;
    height: 36px;
  }
}

.access-link-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  padding: 8px;
  
  &:nth-child(1) {
    .access-icon { background-color: #6166fe; }
  }
  
  &:nth-child(2) {
    .access-icon { background-color: #6166fe;}
  }
  
  &:nth-child(3) {
    .access-icon { background-color: #3275f7;}
  }
  
  &:nth-child(4) {
    .access-icon { background-color: #3275f7;}
  }
  
  &:nth-child(5) {
    .access-icon { background-color: #22244a;}
  }
  
   &:nth-child(6) {
    .access-icon { background-color: #22244a;}
  }
}

.access-text {
  color: var(--light-font);
  font-size: 12px;
  line-height: 24px;
}

.content-section-line,
.content-part-line {
  display: flex;
  justify-content: space-between;
}

.content-part-line {
  height: 100%;
}

.content-section-line { margin: 0 -8px; }

.section-part { flex-basis: 49%; }

.image-wrapper {
  border-radius: 12px;
  overflow: hidden;
  width: 100%;
  height: auto;
  position: relative;
  flex-basis: 48%;
  display: flex;
  
  img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: .2s ease-in;
  }
  
  &:hover img {
    transform: scale(1.125);
  }
}

.image-overlay {
  position: absolute;
  z-index: 1;
  width: 100%;
  height: 100%;
  background: linear-gradient(0deg, rgba(0,16,34,0.8) 0%, rgba(240,244,253,0.2) 90%);
  padding: 12px;
  
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: flex-end;
}

.video-info-text {
 width: calc(100% - 40px);
  
  p { margin: 0; }
}

.video-name, .video-subtext {
  color: #fff;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  
  &.medium {
    font-size: 14px;
    line-height: 24px;
  }
  
  &.tiny {
    font-size: 12px;
    line-height: 16px;
  }
}

.video-info {
  width: 100%;
  display: flex;
  justify-content: space-between;
}

.video-subtext { opacity: .8; }

.files-table {
  background-color: #fff;
  box-shadow: 0 2px 6px 0 rgba(136,148,171,.2),0 24px 20px -24px rgba(71,82,107,.1);
  border-radius: 12px;
  padding: 12px;
  display: table;
  table-layout: auto;
  width: 100%;
  
  &-header {
    display: table-header-group;
  }
  
  &-row {
    display: table-row-group;
  }
}

.table-cell {
  display: table-cell;
  font-size: 12px;
  line-height: 16px;
  color: #000;
  padding: 8px;
}

.column-header {
  font-size: 12px;
  line-height: 16px;
  color: #888da9;
}

.name-cell {
  width: 40%;
  word-break: break-all;
  
  &.pdf:before {
    content: 'PDF';
    background-color: #e2e9f8;
    color: #5a8ff7;
  }
  
  &.jpg:before {
    content: 'JPG';
    background-color: #e4e2f1;
    color: #302d7d;
  }
  
  &:before {
    border-radius: 4px;
    font-size: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 4px;
  }
}

.size-cell {
  width: 20%;
}

.more-action {
  border: none;
  background-color: transparent;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' fill='none' stroke='%23888da9' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' class='feather feather-more-horizontal' viewBox='0 0 24 24'%3E%3Cdefs/%3E%3Ccircle cx='12' cy='12' r='1'/%3E%3Ccircle cx='19' cy='12' r='1'/%3E%3Ccircle cx='5' cy='12' r='1'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
  background-size: contain;
  width: 24px;
  height: 16px;
  outline: none;
  cursor: pointer;
}

.fixed.main-area-header {
  position: sticky;
  z-index: 2;
  top: 0;
  width: 100%;
  padding: 12px 40px;
  transition: .2s;
  animation: sticky .5s forwards;
}

@keyframes sticky {
  0% {
    transform: translatey(-88px);
  }
  
  100% {
    transform: translatey(0px);
  }
}

.video-time {
  position: absolute;
  z-index: 1;
  border-radius: 10px;
  padding: 4px 12px;
  background-color: rgba(139, 156, 163, .5);
  font-size: 10px;
  right: 12px;
  top: 12px;
  color: #fff;
}

.btn-play {
  border-radius: 50%;
  background-color: #fff;
  border: none;
  box-shadow: 0 2px 6px 0 rgba(136,148,171,.2),0 24px 20px -24px rgba(71,82,107,.1);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='%2322244a' stroke='%2322244a' stroke-width='2' stroke-linecap='round' stroke-linejoin='round' class='feather feather-play'%3E%3Cpolygon points='5 3 19 12 5 21 5 3'/%3E%3C/svg%3E");
  background-position: center;
  background-repeat: no-repeat;
  width: 40px;
  height: 40px;
  flex-shrink: 0;
}

.right-area {
  padding: 24px;
  overflow: auto;
}

.right-area-header {
  &-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    
    .more-action {
      width: 24px;
      height: 24px;
    }
  }
}

.download-item-line {
  padding: 12px 0;
}

.line-header {
  font-size: 12px;
  line-height: 16px;
  color: #888da9;
}

.download-area {
  background-color: #eceffb;
  border-radius: 12px;
  padding: 8px;
  display: flex;
  align-items: center;
  margin-top: 12px;
  cursor: pointer;
}

.download-item-texts {
  padding: 0 12px;
  
  p {
    line-height: 16px;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    width: 150px;
  }
}

.download-text-header { font-size: 12px; }

.download-text-info {
  color: #888da9;
  font-size: 10px;
  
  span { margin-left: 8px;}
}

.download-item-icon {
  width: 32px;
}

.download-icon { width: 24px; fill: #4bc3a7; }

.progress-bar {
  height: 4px;
  width: 100%;
  overflow: hidden;
  border-radius: 2px;
  background-color: #dadff3;
  margin: 6px 0;
}

.progress {
  height: 100%;
  width: 40%;
  background-color: #4bc0dd;
  display: block;
}

.received-item-line {
  height: 150px;
  width: 100%;
  padding-top: 12px;
  display: flex;
      padding-left: 4px;
}

.progress-line {
  height: 100%;
  width: 2px;
  background-color: #22244a;
  display: flex;
  justify-content: space-between;
  flex-direction: column;
  position: relative;
  
  &:before, &:after {
    content: '';
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: #22244a;
    transform: translateX(-50%);
    left: 50%;
  }
  
  &:after { bottom: 0; }
}

.time {
  margin-left: 12px;
  font-size: 10px;
  color: #888da9;
}

.received-items-content {
  padding: 24px 10px;
}

.received-files {
  display: flex;
  height: 70%;
  
  .image-wrapper {
    margin-left: 6px;
    display: flex;
  }
}

.received-files-info {
  font-size: 12px;
  line-height: 16px;
  margin-left: 12px;
  margin-top: 12px;
  
  span {
    color: #7a8dc5;
  }
}

.btn-show-left-area,
.btn-show-right-area{
  position: absolute;
  top: 24px;
  width: 32px;
  height: 40px;
  border-radius: 4px;
  background-color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  outline: none;
  cursor: pointer;
  
  display: none;
}

.btn-show-left-area {
  left: 0;
  border-radius: 0 4px 4px 0;
}

.btn-show-right-area {
  right: 0;
  border-radius: 4px 0 0 4px;
}

.btn-close-left,
.btn-close-right {
  border: none;
  background-color: transparent;
  position: absolute;
  top: 4px;
  right: 4px;
  color: var(--light-font);
  outline: none;
  cursor: pointer;
  
  display: none;
}

.show {
  .btn-close-left,
  .btn-close-right {
    display: block;
  }
}

@media screen and (min-width: 850px) and (max-width: 1042px) {
  .access-icon { padding: 16px; }
  
  .access-icon svg {
    width: 20px;
    height: 20px;
  }
}

@media screen and (max-width: 900px) {
  .right-area {
    transform: translateX(100%);
    position: absolute;
    opacity: 0;
    z-index: 2;
    height: 100%;
    box-shadow: 0 0 0 10px rgba(255, 255, 255,.4);
  }
  
  .btn-show-right-area { display: flex; }
    
  .access-icon svg {
    width: 36px;
    height: 36px;
  }
}

@media screen and (max-width: 768px) {
  .left-area {
    transform: translateX(-100%);
    opacity: 0;
    position: absolute;
    z-index: 2;
    height: 100%;
    background-color: #fff;
    background-image: none;
    box-shadow: 0 0 0 10px rgba(255, 255, 255,.4);
  }
  
  .btn-show-left-area { display: flex; }
  
  .content-section-line,
  .content-part-line {
    flex-direction: column;
  }
  .image-wrapper { margin: 10px 0; }
  
  .video-name.tiny, .video-subtext.tiny {
    font-size: 16px;
    line-height: 24px;
  }
  
  .access-link-wrapper {
    width: 33.3%;
  }
}

@media screen and (max-width: 520px) {
  body { padding: 0; }
  
  .app-container { border-radius: 0; }
  
  .content-section { padding: 0 20px; }
  
  .content-section-line { margin: 0; }
}
              
            
!

JS

              
                $(document).ready(function () {
  $("a#pageLink").click(function () {
    $("a#pageLink").removeClass("active");
    $(this).addClass("active");
  });
  
  $(".btn-show-left-area").click(function () {
    $(".left-area").removeClass("show");
    $(".left-area").addClass("show");
  });
  
  $(".btn-show-right-area").click(function () {
    $(".right-area").removeClass("show");
    $(".right-area").addClass("show");
  });
  
  $(".btn-close-right").click(function () {
    $(".right-area").removeClass("show");
  });
  
  $(".btn-close-left").click(function () {
    $(".left-area").removeClass("show");
  });
});

$('.main-area').scroll( function() {
    if ($('.main-area').scrollTop() >= 88) {
       $('div.main-area-header').addClass('fixed');
    }
    else {
       $('div.main-area-header').removeClass('fixed');
    }
});
              
            
!
999px

Console