style.css

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;700&display=swap');

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  overflow-x: hidden;
}

/* Style Code related to Header */
.material-icons {
  color: rgba(0, 0, 0, 0.74);
}

.header {
  display: flex;
  justify-content: space-between;
  height: 70px;
  padding: 15px;
}

.header_left {
  display: flex;
  align-items: center;
}

.header_left img {
  margin-left: 15px;
}

.header i {
  padding: 0 7px;
  cursor: pointer;
}

.header_search form {
  border: 1px solid #ddd;
  height: 35px;
  padding: 0;
  margin: 0;
  display: flex;
}
.header_search input {
  width: 500px;
  padding: 10px;
  margin: 0;
  border-radius: 0;
  border: none;
  font-size: 15px;
  letter-spacing: 0.5px;
}
.header_search button {
  padding: 0;
  margin: 0;
  height: 100%;
  border: none;
  border-radius: 0;
}
.header_icons img {
  width: 30px;
  height: 30px;
  border-radius: 50px;
}

/* Main Body */
.mainBody {
  height: calc(100vh-70px);
  display: flex;
  overflow: hidden;
}
/* Side Bar */
.sidebar {
  height: 100%;
  width: 230px;
  background-color: white;
  overflow-y: scroll;
}
.sidebar-categories {
  width: 100%;
  display: flex;
  flex-direction: column;
  margin-bottom: 15px;
  margin-top: 15px;
}

.sidebar-category {
  display: flex;
  align-items: center;
  padding: 12px 25px;
}
.sidebar-category span {
  margin-left: 15px;
}

.sidebar-category:hover {
  background: #e5e5e5;
  cursor: pointer;
}

.sidebar::-webkit-scrollbar {
  display: none;
}

hr {
  height: 1px;
  background-color: #e5e5e5;
  border: none;
}

.videos {
  background-color: #f0f0f0;
  width: 100%;
  height: 100%;
  padding: 15px;
  border-top: 1px solid #ddd;
}
.videos_container {
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  flex-wrap: wrap;
  background-color: whitesmoke;
}
.video {
  width: 310px;
  margin-right: 10px;
  margin-bottom: 30px;
}

.video-thumbnail {
  width: 100%;
  height: 170px;
}
.video-thumbnail img {
  width: 100%;
  height: 170px;
  object-fit: cover;
}
.author img {
  object-fit: cover;
  border-radius: 50%;
  height: 40px;
  width: 40px;
  margin-right: 10px;
}
.video-details {
  display: flex;
  margin-top: 10px;
}
.title {
  display: flex;
  flex-direction: column;
}
.title h3 {
  color: rgb(3, 3, 3);
  line-height: 20px;
  font-size: 14px;
  margin-bottom: 6px;
}

.title a {
  text-decoration: none;
  color: rgb(96, 96, 96);
  font-size: 14px;
  text-transform: capitalize;
}

h1 {
  font-size: 23px;
  margin-top: 50px;
  margin-bottom: 10px;
  color: rgb(3, 3, 3);
  margin-left: 5px;
}

/* Filters */
.filters {
  position: absolute;
  left: 200px;
  top: 69px;
  width: 100%;
  height: 60px;
  background: #fff;
  border-top: 1px solid #dbdbdb;
  border-bottom: 1px solid #dbdbdb;
  padding: 0 20px;
  display: flex;
  align-items: center;
  overflow: none;
}

.filter-options {
  flex: 0 0 auto;
  padding: 10px 20px;
  border-radius: 50px;
  background: #f0f0f0;
  border: 1px solid #dbdbdb;
  margin-right: 10px;
  color: #242424;
  font-size: 15px;
  cursor: pointer;
}

.filter-options:hover {
  color: #fff;
  background: #242424;
}