:root {
  /*--body-font: "Inter", sans-serif;*/
  --theme-bg: #1f1d2b;
  --body-color: #808191;
  --button-bg: #353340;
  --border-color: rgb(128 129 145 / 24%);
  --video-bg: #252936;
  --delay: 0s;
}

.container-123 {
  background-color: var(--theme-bg);
  display: flex;
  overflow: hidden;
  width: 100%;
  border-radius: 20px;
  font-size: 15px;
  font-weight: 500;
  /*box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);*/
  position: relative;
}

.wrapper {
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.main-container {
  display: flex;
  flex-direction: column;
  padding: 0 30px 30px;
  flex-grow: 1;
  /*overflow: auto;*/
}

.anim {
  -webkit-animation: bottom 0.8s var(--delay) both;
          animation: bottom 0.8s var(--delay) both;
}

.main-header {
  font-size: 30px;
  color: #fff;
  font-weight: 700;
  padding-bottom: 20px;
  position: sticky;
  top: 0;
  left: 0;
  background: linear-gradient(to bottom, #1f1d2b 0%, #1f1d2b 78%, rgba(31, 29, 43, 0) 100%);
  z-index: 11;
}

.small-header {
  font-size: 24px;
  font-weight: 500;
  color: #fff;
  margin: 30px 0 20px;
}

.main-blogs {
  display: flex;
  align-items: center;
}

.main-blog {
  background-image: url("/img/project/teaching_1.png");
  background-size: 100%;
  /*background-position-x: 150px;*/
  /*background-color: #31abbd;*/
  display: flex;
  flex-direction: column;
  width: 65%;
  padding: 30px;
  border-radius: 20px;
  align-self: stretch;
  /*overflow: hidden;*/
  position: relative;
  transition: background 0.3s;
  background-repeat: no-repeat;
  height:400px;
}
.main-blog + .main-blog {
  margin-left: 20px;
  width: 35%;
  background-image: url("/img/project/teaching_2.jpg");
  background-color: unset;
  background-position-x: 0;
  background-size: 139%;
  filter: saturate(1.4);
}
.main-blog + .main-blog .author-img {
  border-color: rgba(255, 255, 255, 0.75);
  margin-top: 14px;
}
.main-blog + .main-blog .author-img__wrapper svg {
  border-color: #ffe6b2;
  color: #e7bb7d;
}
.main-blog + .main-blog .author-detail {
  margin-left: 0;
}
@media screen and (max-width: 905px) {
  .main-blog, .main-blog + .main-blog {
    width: 50%;
    padding: 30px;
  }
  .main-blog {
    background-size: cover;
    background-position-x: center;
    background-blend-mode: overlay;
  }
}


.author-img {
  width: 52px;
  height: 52px;
  border: 1px solid rgba(255, 255, 255, 0.75);
  padding: 4px;
  border-radius: 50%;
  -o-object-fit: cover;
     object-fit: cover;
}
.author-img__wrapper {
  position: relative;
  flex-shrink: 0;
}
.author-img__wrapper svg {
  width: 16px;
  padding: 2px;
  background-color: #fff;
  color: #0daabc;
  border-radius: 50%;
  border: 2px solid #0daabc;
  position: absolute;
  bottom: 5px;
  right: 0;
}
.author-name {
  font-size: 15px;
  color: #fff;
  font-weight: 500;
  margin-bottom: 8px;
}
.author-info {
  font-size: 13px;
  font-weight: 400;
  color: #fff;
}
.author-detail {
  margin-left: 16px;
}

.seperate {
  width: 3px;
  height: 3px;
  display: inline-block;
  vertical-align: middle;
  border-radius: 50%;
  background-color: #fff;
  margin: 0 6px;
}
.seperate.video-seperate {
  background-color: var(--body-color);
}

.videos {
  display: grid;
  width: 100%;
  grid-template-columns: repeat(3, 1fr);/*changed 4-->3*/
  grid-column-gap: 20px;
  grid-row-gap: 20px;
}
@media screen and (max-width: 980px) {
  .videos {
    grid-template-columns: repeat(2, 1fr);
  }
}

.video {
  position: relative;
  /*background-color: var(--video-bg);*/
  background-color: var(--video-bg);
  border-radius: 20px;
  overflow: hidden;
  transition: 0.4s;

}
.video-wrapper {
  position: relative;
  height:200px;
}
.video-name {
  color: #fff;
  font-size: 16px;
  line-height: 1.4em;
  padding: 12px 20px 0px;
  overflow: hidden;
  background-color: var(--video-bg);
  z-index: 9;
  position: relative;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  padding-top: 0px;

}
.video-view {
  font-size: 12px;
  padding: 12px 20px 20px;
  background-color: var(--video-bg);
  position: relative;
  color:white;
}
.video-by {
  transition: 0.3s;
  padding: 20px 20px 0px;
  display: inline-flex;
  position: relative;
  color:white;
}
.video-by:before {
  content: "";
  background-color: #22b07d;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  position: absolute;
  top: 26px;
  right: 5px;
}
.video-by.offline:before {
  background-color: #ff7551;
}
.video-time {
  position: absolute;
  background: rgba(21, 13, 13, 0.44);
  color: rgba(255, 255, 255, 0.85);
  padding: 3px 8px;
  font-size: 12px;
  border-radius: 6px;
  top: 10px;
  z-index: 1;
  right: 8px;
}
.video:hover video {
  transform: scale(1.6);
  transform-origin: center;
}
.video:hover .video-time {
  display: none;
}
.video:hover .video-author {
  bottom: -65px;
  transform: scale(0.6);
  right: -3px;
  z-index: 10;
}
.video:hover .video-by {
  opacity: 0;
}
.video-author {
  position: absolute;
  right: 10px;
  transition: 0.4s;
  bottom: -25px;
}
.video-author svg {
  background-color: #0aa0f7;
  color: #fff;
  border-color: var(--video-bg);
}

video {
  /*max-width: 100%;*/
  width: 100%;
  border-radius: 20px 20px 0 0;
  display: block;
  cursor: pointer;
  transition: 0.4s;
}


.show .main-header,
.show .main-blogs,
.show .small-header,
.show .videos {
  display: none;
}

.video-content {
  width: 100%;
}

.button-wrapper {
  display: flex;
  align-items: center;
  margin-left: auto;
}

.video-stats {
  margin-left: 30px;
}

.video-detail {
  display: flex;
  margin-top: 30px;
  width: 100%;
}


@media screen and (max-width: 735px) {
  .main-blogs {
    flex-wrap: wrap;
  }

  .main-blog,
.main-blog + .main-blog {
    width: 100%;
  }

  .videos {
    grid-template-columns: 1fr;
  }

  .main-blog + .main-blog {
    margin-left: 0;
    margin-top: 20px;
    background-size: cover;
  }
}
@media screen and (max-width: 475px) {
  .main-blog__title {
    font-size: 20px;
  }

  .author-name {
    font-size: 14px;
  }

  .main-blog__author {
    flex-direction: column-reverse;
    align-items: flex-start;
  }

  .author-detail {
    margin-left: 0;
  }

  .main-blog .author-img {
    margin-top: 14px;
  }

  .main-container {
    padding: 0 20px 20px;
  }

  .header {
    padding: 20px;
  }

  .sidebar.collapse {
    width: 40px;
  }

  .sidebar {
    align-items: center;
  }

  body {
    padding: 0;
  }

  .container-123 {
    /*height: 100vh;*/
    border-radius: 0;
    /*max-height: 100%;*/
  }
}
::-webkit-scrollbar {
  width: 6px;
  border-radius: 10px;
}

::-webkit-scrollbar-thumb {
  background-color: rgba(21, 20, 26, 0.63);
  border-radius: 10px;
}