style.css

*{
    margin: 0;
    padding: 0;
    font-family: 'poppins', sans-serif;
    box-sizing: border-box;
}
/* Remove vertical scrollbar */
body::-webkit-scrollbar{
  display: none;
}
body{
    overflow-x: hidden;
}
a{
     text-decoration: none;
     color: #5a5a5a;
}
img{
    cursor: pointer;
}
.flex-div{
    /* flex make div flexible */
    display: flex; 
    align-items: center;
}
nav{
    /* padding from top and bottom 10px and 2% from left and right */
    padding: 10px 2%;
    justify-content: space-between;
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 10;
}
.nav-right img{
    /* width means size of all 3 right icons set to 25px and margin from right gives space b/w icons are 30px */
    width: 25px;
    margin-right: 30px;
}
.nav-right .user-icon{
    width: 35px;
    border-radius: 50%;
    margin-right: 0; 
}
.nav-left .menu-icon{
    width: 22px;
    margin-right: 25px;
}
.nav-left .logo{
    width: 150px;
}
.nav-middle .mic-icon{
  width: 16px;
}
.nav-middle .search-box{
  border: 1px solid rgb(73, 221, 10);
  margin-right: 15px;
  padding: 8px 12px;
  border-radius: 35px;
}
.nav-middle .search-box input{
    /* An outline is a line that is drawn around elements, OUTSIDE the borders, to make the element "stand out". */
  width: 400px;
  border: 0;
  outline: 0;
  background: transparent;
}
.nav-middle .search-box img{
    width: 18px;
}

/* ---------- sidebar---------- */

.sidebar{
    /* width use for sidebar width-size */
    background: #fff;
    width: 15%;
    height: 100vh;
    position: fixed;
    top: 0;
    padding-left: 0.3rem;
    padding-top: 70px;
    
}
.shortcut-links a img{
/* margin-right gives margin from right side i.e space b/w icons and sidebar names. */
   width: 20px;
   margin-right: 2px;
}
.shortcut-links a{
    /* margin from bottom is 15px i.e space b/w Home,Explore,etc */
    /* automatically fit content in given container */
    display: flex;
    align-items: center;
    margin-bottom: 20px;
    width: fit-content;
    flex-wrap: wrap;
}
.shortcut-links a:first-child{
    color: #e82e28;
}
.sidebar hr{
    border: 0;
    height: 1px;
    background: #ccc;
    width: 80%;
}
.subscribed-list h3{
    font-size: 12px;
    margin: 14px -5px;
    color: #f3b409;
}
.subscribed-list a{
    display: flex;
    align-items: center;
    margin-bottom: 10px;
    width: fit-content;
    flex-wrap: wrap;
}
.subscribed-list a img{
    width: 25px;
    border-radius: 50%;
    margin-right: 20px;
}

/* small-sidebar comes from js file */
/* It works only when click on menu icon */
.small-sidebar{
    width: 5%;
}
/* when click on menu icon content written in p tag will be hidden */
.small-sidebar a p{
    display: none;
}
.small-sidebar h3{
    display: none;
}
.small-sidebar hr{
    width: 50%;
    margin-bottom: 25px;
}

/* ---------main----------- */

/* whole div container */
.container{
    background: #f9f9f9;
    padding-left: 16%;
    padding-right: 1%;
    padding-top: 15px;
    padding-bottom: 10px;
}
/* It comes from js file */
.large-container{
    padding-left: 7%;
}
.banner{
    width: 100%;
}
.banner img{
    width: 100%;
    border-radius: 8px;
}
/* grid-column-gap gives gap(space) b/w two thumbnail horizontally */
/* grid-row-gap gives gap(space) b/w two thumbnail vertically */
/* margin-top gives margin from banner images */
.list-container{
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(250px, 1fr));
    grid-column-gap: 12px;
    grid-row-gap: 15px;
    margin-top: 12px;
}
/* vid-list for thumbnail 1 */
/* width set size of Thumbnail */
.vid-list .thumbnail{
    width: 100%;
    border-radius: 5px;
}
/* 	Items are positioned at the beginning of the container from align-items: flex-start */
.vid-list .flex-div{
    align-items: flex-start;
    margin-top: 5px;
}
.vid-list .flex-div img{
    width: 45px;
    margin-right: 10px;
    border-radius: 50%;
}
.vid-info{
    color: #5a5a5a;
    font-size: 13px;
}
.vid-info a{
    color: #000;
    font-weight: 700;
    display: block;
    margin-bottom: 3px;
}

/* When width less than or equal to 900 then menu icon and sidebar are hidden */
@media(max-width: 900px){
    /* .menu-icon{
        display: none;
    } */
    /* .sidebar{
        display: none;
    } */
    .container .large-container{
        padding-left: 5%;
        padding-right: 5%;
    }
    /* .nav-right img{
        display: none;
    } */
    /* display: block; Displays an element as a block element (like <p>). It starts on a new line, and takes up the whole width. */
    .nav-right .user-icon{
        display: block;
        width: 30px;
    }
    .nav-middle .search-box input{
        width: 150px;
    }
    /* .nav-middle .mic-icon{
        display: none;
    } */
    .nav-left .logo{
        width: 100px;
    }
}

/* ------------play video page-------- */

.play-container{
  padding-left: 2%;
}
/* flex-wrap, wrap the recommend videos automatically */
.row{
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}
/* The flex-basis property specifies the initial length of a flexible item.
Note: If the element is not a flexible item, the flex-basis property has no effect. */
.play-video{
    flex-basis: 69%;
}
.right-sidebar{
    flex-basis: 30%;
}
.play-video video{
    width: 100%;
}
.side-video-list{
    display: flex;
    justify-content: space-between;
    margin-bottom: 4px;
}
/* width gives size of right side videos */
.side-video-list img{
    width: 100%;
}
.side-video-list .small-thumbnail{
    flex-basis: 49%;
}
.side-video-list .vid-info{
    flex-basis: 49%;
}
.play-video .tags a{
    color: #0000ff;
    font-size: 12px;
}
.play-video h3{
    font-weight: 500;
    font-size: 22px;
}
.play-video .play-video-info{
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-top: 7px;
    font-size: 14px;
    color: #5a5a5a;
}
.play-video .play-video-info a img{
    width: 20px;
    margin-right: 8px;
}
.play-video .play-video-info a{
    display: inline-flex;
    align-items: center;
    margin-left: 15px;
}
.play-video hr{
    border: 0;
    height: 1px;
    background: rgb(48, 236, 6);
    margin: 10px 0;
}
.publisher{
    display: flex;
    align-items: center;
    margin-top: 20px;
}
.publisher div{
    flex: 1;
    line-height: 18px;
}
.publisher img{
    width: 60px;
    border-radius: 50%;
    margin-right: 15px;
}
.publisher div p{
    color: #000;
    font-weight: 600;
    font-size: 18px;
}
.publisher div span{
    font-size: 13px;
    font-weight: 600;
    color: #5a5a5a;
}
.publisher button{
    background: rgb(254, 13, 13);
    color: #fff;
    padding: 8px 20px;
    border: 0;
    outline: 0;
    border-radius: 3px;
    cursor: pointer;
}
/* focus for cursor pointer click and active when click the button */
#but:focus{
    background-color: #151615;
 }
#but:focus::after{
    content: 'D';
 }
.vid-description{
    padding-left: 50px;
    margin: 10px 0;
}
.vid-description p{
    font-size: 14px;
    margin-bottom: 3px;
    color: #5a5a5a;
}
.vid-description h4{
    font-size: 14px;
    color: #5a5a5a;
    margin-top: 5px;
}
.vid-description hr{
    background-color: #000;
}
.add-comment{
    display: flex;
    align-items: center;
    margin: 20px 0;
}
.add-comment img{
    width: 35px;
    border-radius: 50%;
    margin-right: 15px;
}
.add-comment input{
    border: 0;
    outline: 0;
    border-bottom: 1px solid rgb(27, 24, 24);
    width: 100%;
    padding-top: 10px;
    background: transparent;
}
.old-comment{
    display: flex;
    align-items: center;
    margin: 20px 0;
}
.old-comment img{
    width: 35px;
    border-radius: 50%;
    margin-right: 15px;
}
.old-comment h3{
    font-size: 14px;
    margin-bottom: 5px;
}
.old-comment h3 span{
    font-size: 12px;
    color: #5a5a5a;
    font-weight: 700;
    margin-left: 8px;
}
.old-comment .comment-action{
    display: flex;
    align-items: center;
    margin: 8px 0;
    font-size: 14px;
}
.old-comment .comment-action img{
    border-radius: 0;
    width: 20px;
    margin-right: 5px;
}
.old-comment .comment-action span{
    margin-right: 20px;
    color: #5a5a5a;
}
.old-comment .comment-action a{
    color: #7f7ffd;
}


@media(max-width:900px){

    .play-video{
        flex-basis: 100%;
    }
    .right-sidebar{
        flex-basis: 100%;
    }
    .play-container{
        padding-left: 5%;
    }
    .vid-description{
        padding-left: 0;
    }
    .play-video .play-video-info a{
        margin-left: 0;
        margin-right: 15px;
        margin-top: 15px;
    }
}