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        <h2 class="section-title">Elad Shechter</h2>
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              <time datetime="">Jun 10</time>
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                Do you want to know how I made CSS reverse engineering of the Twitter website?! 😃 I just wrote a full article on it.

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                  <p class="embed-content-paragraph">As someone who loves CSS and appreciates its importance in this day and age, it is very unclear to me how the web industry’s most…</p>
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              <time datetime="">Jun 4</time>
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              <p>The New <a href="https://twitter.com/hashtag/CSS" target="_blank">#CSS</a> Logical Properties (English) - by Elad Shechter</p>
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                  <h2 class="embed-content-title">Understanding the “Initial”, “Inherit” and “Unset” CSS Keywords</h2>
                  <p class="embed-content-paragraph">CSS has default keywords for various values. In this article I’m going to talk about three of them: initial, inherit, and the relatively…</p>
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              <time datetime="">Apr 5</time>
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                The Coronavirus Invaders!<br>
                I just created Pure CSS Game! (No JS).<br>
                Try, how many Coronavirus are you able to eliminate?😃<br><br>

                Full page game:<br>
                <a href="https://codepen.io/elad2412/full/wvabjXy" target="_blank">https://codepen.io/elad2412/full/wvabjXy</a><br><br>

                Editor view:<br>
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                <span class="common-title">Elad Shechter</span>
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              <time datetime="">Mar 1</time>
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              <p>
                "Why the World Needs CSS Developers"<br><br>

In the last 10 years, the web standards have been grown rapidly. But the FED job titles stayed the same.<br>
In my new article, I will explain, from my perspective, why it's time to change and adapt new job titles!<br>
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                  <h2 class="embed-content-title">Why the World Needs CSS Developers</h2>
                  <p class="embed-content-paragraph">In the last ten years, give or take a few, CSS has grown extensively with the addition of more and more features, thus gradually becoming…</p>
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              <time datetime="">Jan 31</time>
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              <p>Elad Shechter (<a href="https://twitter.com/eladsc" target="_blank">@eladsc</a>) explains how initial, inherit and unset keywords work.</p>
              <a class="embed-content" href="https://buff.ly/2uizb2S" target="_blank">
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                <div class="embed-content-text">
                  <h2 class="embed-content-title">Understanding the “Initial”, “Inherit” and “Unset” CSS Keywords</h2>
                  <p class="embed-content-paragraph">CSS has default keywords for various values. In this article I’m going to talk about three of them: initial, inherit, and the relatively…</p>
                  <footer class="embed-content-info"><span class="icon">🔗</span><span class="text">medium.com</span></footer>
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              <time datetime="">Jan 31</time>
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              <p>Why CSS HSL Colors are Better!</p>
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                  <h2 class="embed-content-title">Why CSS HSL Colors are Better!</h2>
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/****** More of My Resets *******/
*,
*::before,
*::after{box-sizing:border-box;}
:focus{outline:none;}
button{background-color:transparent; color:inherit; border-width:0; padding:0; margin:0; cursor:pointer;}
img{display:block; max-width:100%;}
a{text-decoration:none; cursor:pointer;}

/* Responsive Variables */
$break1:    "(max-width:499px)";
$break2:    "(min-width:500px) and (max-width:1004px)";
$break2open:"(min-width:500px)";
$break3:    "(min-width:1005px) and (max-width:1094px)";
$break3open:"(min-width:1005px)";
$break4:    "(min-width:1095px) and (max-width:1281px)";
$break4open:"(min-width:1095px)";
$break5open:"(min-width:1282px)";

.is-hide-break1{
  @media #{$break1}{display:none!important;}
}
.is-only-break1{
  @media #{$break2open}{display:none!important;}
}

/* Multi direcrtion Languages Support Variables*/
$start-direction: left !default;
$end-direction:   right !default;

/* typography */
html{font-size:1px;/*for using REM units*/}
body{
  font-family:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Ubuntu, "Helvetica Neue", sans-serif;
  font-size:16rem; line-height:1.3;
}

/* utilities classes */
.u-hide{display:none!important;}
.u-block{display:block!important;}
.u-flex{display:flex!important;}
.u-space-between{justify-content:space-between!important;}
.u-common-padding{padding:10px 15px!important;}
.u-margin-auto{margin:auto!important;}
.u-margin-start-auto{margin-#{$start-direction}:auto!important;}
.u-margin-bottom{margin-bottom:10px!important;}

/* colors */
:root{
  --white:#fff;
  --black:#000;
  --grayA:#657786;
  --gray-light:#f8f5fa;
  --border-color:#e6ecf0;
  
  /* common blue */
  --base-color:203; /* base hue of blue*/
  --main-color:hsla(var(--base-color), 89%, 53%, 1);
  --hover-color:hsla(var(--base-color), 89%, 47%, 1);
  --bg-hover-color:hsla(var(--base-color), 89%, 53%, 0.1);
}

/*mixin*/
@mixin trim{text-overflow:ellipsis; white-space:nowrap; overflow:hidden; display:block;}
@mixin scroll{overflow-y:auto; scrollbar-width:thin; /*-webkit-overflow-scrolling:touch;*/}

/*scrolls*/
 ::-webkit-scrollbar {width:6px!important; height:6px!important; background-color:#f5f5f5;}
 ::-webkit-scrollbar-thumb {background-color:rgba(0,0,0,.2);}
 ::-webkit-scrollbar-track {background-color:rgba(255, 255, 255, 0.08);}   

/* animation */
@keyframes clickableAnimation {
  0% {transform:scale(1);}
  95% {transform:scale(1);}
  96% {transform:scale(1.25);}
  97% {transform:scale(1.25);}
  100% {transform:scale(1);}
}
.u-animation-click{animation: clickableAnimation 20s ease-in-out -17s infinite;}

/* icons */
.icon{filter:grayscale(1) opacity(0.8);}
.icon-explore{font-size:28px; color:var(--main-color);}
.icon-more{
  display:flex; width:24px; height:24px; border:solid 1px var(--black); border-radius:50%;
  &::before{content:""; width:4px; height:4px; margin:auto; background-color:var(--black); border-radius:inherit; box-shadow:6px 0px var(--black), -6px 0px var(--black);}
}
.icon-gif{
  display:inline-flex; vertical-align:bottom; width:20px; height:20px; border:solid 1px var(--black); text-transform:uppercase; font-size:8px; font-weight:800;
  &::before{content:"gif"; margin:auto; }
}
.icon-poll{display:inline-flex; transform:rotateZ(90deg);}
.icon-arrow-down{
  position:relative; #{$start-direction}:-2px;
  &::before,
  &::after{content:""; position:absolute; display:block; height:2px; width:8px; background:var(--grayA);}
  &::before{transform:translateX(-4px) rotateZ(45deg);}
  &::after{transform:rotateZ(-45deg);}
}
.icon-tweet{filter:grayscale(1) opacity(0.8) brightness(1.5);}


/* Grid Layout */
.main-grid{
  display:grid; justify-content:center; min-height:100vh; margin:0 auto;
  @media #{$break1}, #{$break2}{ .main-side{display:none;} }
  @media #{$break2}{    grid-template-columns:auto minmax(auto, 600px); max-width:705px;}
  @media #{$break3open}{grid-template-columns:auto 600px minmax(290px, 380px); padding:0 10px; box-sizing:content-box;}
  @media #{$break4open}{max-width:1235px;}
}

/*elemenets*/
.profile-image{border-radius:50%;}
.common-link{
  color:var(--main-color);
  &:hover, &:focus{text-decoration:underline;}
}
.common-button{
  --button-height:40px;
  --button-padding:15px;
  background-color:var(--main-color); height:var(--button-height); padding:0 var(--button-padding); border-radius:calc( var(--button-height) / 2 ) / 50%;
  color:var(--white); font-size:15rem; font-weight:bold;
  &.is-full-width{width:100%;}
  &.is-height-big{--button-height:50px;}
  &.is-invert{
    background-color:transparent; border:solid 1px var(--main-color); color:var(--main-color);
    &:hover, &:focus{background-color:var(--bg-hover-color);}
  }
  &:hover, &:focus{background-color:var(--hover-color);}
}
.icon-button{
  --icon-button-size:40px;
  height:var(--icon-button-size); width:var(--icon-button-size); border-radius:50%;
  &:hover,
  &:focus{background-color:var(--bg-hover-color);}
}
.tweet-button{
  @media #{$break1}{
     position:fixed; #{$start-direction}:auto; #{$end-direction}:15px; bottom:75px;
    .common-button{
      width:auto; box-shadow:rgba(101, 119, 134, 0.2) 0px 0px 8px, rgba(101, 119, 134, 0.25) 0px 1px 3px 1px;
      .text{display:none;}
    }
  }
  @media #{$break2}, #{$break3}, #{$break4}{
    .common-button{
        padding:0;
        .text{display:none;}
      }
  }
  @media #{$break5open}{
    .common-button .icon{display:none;}
  }
}
.section-title{font-size:19rem; font-weight:800;}
.common-title{font-size:15rem; font-weight:700; color:var(--black);}
.trend-category{font-size:13rem; color:var(--grayA); margin-bottom:5px;}
.usercode{color:var(--grayA); font-size:15rem;}
.logo{
  display:block; width:50px; height:50px; border-radius:50%; margin:2px 0;
  font-size:24px; line-height:50px; text-decoration:none; text-align:center;
  .icon{
    display:block;
    filter:hue-rotate(175deg) opacity(0.8); transform:scale(-1, 1); 
  }
  &:hover, &:focus{background-color:var(--bg-hover-color);}
}
.menu-item{
  display:flex; align-items:center; width:fit-content; padding:10px; border-radius:20px / 50%;
  font-weight:bold; font-size:19rem;
  .icon{
    width:26px; height:26px;
    line-height:26px; text-align:center; filter:grayscale(1) opacity(0.8); transition:0.2s;
    &-explore{filter:grayscale(1) opacity(1) brightness(0.5);}
  }
  .text{color:var(--black); padding-#{$end-direction}:15px; margin-#{$start-direction}:20px; }
  &:hover, &:focus{background-color:var(--bg-hover-color);}
  &:hover, 
  &:focus,
  &.is-selected{
    .text{color:var(--main-color);}
    .icon{filter:grayscale(0.3) opacity(1);}
  }
   @media #{$break1}, #{$break2}, #{$break3}, #{$break4}{     
     .text{display:none;}
     .common-button{
       .text{display:none;}
     }
  }
}
.search-box{
  --search-height:42px;
  position:relative; display:flex; transition:0.2s;
  border:solid 1px transparent; border-radius:calc(var(--search-height) / 2) / 50%; background-color:var(--border-color);     
  &:focus-within{
    background-color:transparent; border-color:var(--main-color);
    .icon{filter:grayscale(0) opacity(1);}
  }
  .icon{margin:auto 10px; transform:scale(-1, 1);}
  input{
    -webkit-appearance:none; appearance:none;
    background-color:transparent; border:none; /* reset input */
    padding:5px 10px; width:100%; height:var(--search-height);    
    &::-webkit-input-placeholder {font-size:15rem; overflow:visible; line-height:1;}
    &::-moz-placeholder{font-size:15rem; overflow:visible; line-height:1;}
    &:placeholder {font-size:15rem; overflow:visible; line-height:1;}
  }  
}
.common-more{display:block; padding:10px 15px; color:var(--main-color); border-radius:0 0 10px 10px;}

/*components */
.main-nav{
  @include scroll();
  position:sticky; top:0; max-height:100vh; overflow:auto;
  &-item{padding:7px 0;}
  @media #{$break1}{
    position:fixed; z-index:4; #{$start-direction}:0; #{$end-direction}:0; bottom:0; top:auto;
    background-color:var(--white); border-top:solid 1px var(--border-color);
    .logo{display:none;}
    &-list{display:flex; justify-content:space-between; padding:0 15px;}
  }
  @media #{$break2}, #{$break3}, #{$break4}{
      width:68px; padding:0 10px; 
  }
  @media #{$break5open}{
    min-width:88px; width:255px; padding-#{$end-direction}:44px;  
  }
}
.main-content{border:solid 0 var(--border-color); border-width:0 1px;}
.main-side{
  margin-#{$start-direction}:30px;
  &-searchbox{position:sticky; z-index:2; top:0; padding-top:10px; padding-bottom:10px; background-color:var(--white);}
}

.main-header{
  position:-webkit-sticky;/* Safari */ position:sticky; z-index:2; top:0; background-color:var(--white);
  display:flex; height:50px; padding:0 15px; border-bottom:solid 1px var(--border-color);
  &-content{display:flex; height:100%; flex-direction:column; justify-content:center;}
  .icon-button{margin-top:auto; margin-bottom:auto;}
  .icon-back{margin-#{$end-direction}:10px; font-size:22px;}
}
.common-nav{
  border-bottom:solid 1px var(--border-color);
  &-list{display:flex; overflow:auto; max-width:100vw;}
  &-item{
    flex:1 auto;
    a{display:block; padding:15px; text-align:center; font-size:15rem; font-weight:700; color:var(--grayA); white-space:nowrap;}
    .is-selected{border-bottom:solid 2px CurrentColor; color:var(--main-color);}
  }
}
.profile-box{
  .profile-image{
    --image-size:142px;
    display:inline-block; width:var(--image-size); background-color:var(--white); border:solid 4px var(--white); margin-top:calc( var(--image-size) / 2 * -1);
  }
  &.is-list-counters{
    .common-title{padding-#{$end-direction}:5px;}
    li + li{margin-#{$start-direction}:15px;}
  }
  &-info{
    display:flex;
    li:not(:first-child){margin-#{$start-direction}:10px;}
    .icon + .text{padding-#{$start-direction}:5px;}
  }
}
.message-box{
  display:grid; grid-template-columns:50px auto; grid-gap:10px;
  grid-template-areas:"image content"
                      "image nav";
  padding:10px 15px; border-bottom:solid 10px var(--border-color);
  &-content{
    padding:10px 0; font-size:19rem;
    &::before{content:"What's happening?"; color:#9197a3;}
    &:not(:empty)::before{content:"";}
    &:focus{
      outline:none;
      &::before{color:#bdc1c9;}     
    }
  }
  &-nav{
    grid-area:nav;
    .icon-button{font-size:18px;}
  }
}
.feed{
  &-item{
    border-bottom:solid 1px var(--border-color);
  }
}
.tweet-item{
  display:grid; grid-template-columns:50px auto; grid-column-gap:10px;
  grid-template-areas:"image user"
                      "image content"
                      "image options";
  padding:10px 15px;
  .profile-image{grid-area:image;}
  &-info{grid-area:user;}
  .common-content{grid-area:content;}
  .message-options{grid-area:options;}
  
  &-info-user{
    &:hover, &:focus{
      .common-title{text-decoration:underline;}
    }
  }
  time{
    color:var(--grayA);
    &::before{content:"·"; margin:0 5px;}
  }
  &:hover{background:var(--gray-light);}
}
.message-options{
  .icon{opacity:0.8; font-size:18rem;}
  .text{color:var(--grayA);}
}
.common-content{
  a:not(.embed-content){
    color:var(--main-color);
    &:hover, &:focus{text-decoration:underline;}
  }
}
.embed-content{
  --border-color:#ccd6dd;
  display:block; border:solid 1px var(--border-color); border-radius:10px; margin-top:10px; margin-bottom:5px;
  &:focus{border-color:var(--main-color);}
  &-image{border-radius:10px 10px 0 0; border-bottom:solid 1px; border-color:inherit;}
  &-title{color:var(--black); margin-bottom:5px;}
  &-paragraph{color:var(--grayA);}
  &-info{
    color:var(--grayA); margin-top:5px;
    .icon{margin-#{$end-direction}:5px;}
  }
  &-text{padding:10px; font-size:15px; text-decoration:none;}
}
.common-box{
  background-color:#f5f8fa; border-radius:10px; margin-bottom:15px;
  a{
    &:hover, &:focus{background-color:#edf1f4;}
  }
  &-header{
    padding:10px 15px; border-bottom:solid 1px var(--border-color);
    .icon-button{--icon-button-size:27px;}
  }
}
.content-image{border-radius:10px; margin-top:10px;}
.common-list{
  &-item{
    position:relative;
    border-bottom:solid 1px var(--border-color);
    .common-title{margin-bottom:5px;}
    p{color:var(--grayA); font-size:15rem;}
    .icon-button{--icon-button-size:27px; position:absolute; #{$end-direction}:10px; top:10px;}
  }
}
.user-item{
  display:grid; grid-template-columns:50px 1fr auto; grid-column-gap:10px; flex:1;
  grid-template-areas:"image title button"
                      "image usercode button";
  .profile-image{grid-area:image; font-size:8rem; text-align:center; background-color:var(--grayA); height:50px; overflow:hidden;}
  .common-title{grid-area:title; margin-bottom:0; align-self:end;}
  .usercode{grid-area:usercode; align-self:start;}  
  .common-button{    
    grid-area:button; display:flex; margin:auto; margin-#{$end-direction}:10px; --button-height:30px;
    .text{margin:auto;}
  }
  &:hover, &:focus{background-color:transparent;}
}

View Compiled
/*JS isn't my expertise 😉.
  This is only to demonstrate how will look the profile page*/
$(document).ready(function() {
  $(".js-profile").on("click", function(){
    $(".menu-item").removeClass("is-selected");
    $(this).addClass("is-selected");
    $(".icon-back, .profile-box").removeClass("u-hide");
    $(".message-box").addClass("u-hide");
    $(".js-title").text("Elad Shechter");
  });
  
  $(".js-home").on("click", function(){
      $(".menu-item").removeClass("is-selected");
      $(".menu-item.js-home").addClass("is-selected");
      $(".icon-back, .profile-box").addClass("u-hide");
      $(".message-box").removeClass("u-hide");
      $(".js-title").text("Home");
  });
  
  $(".js-tweet").on("click", function(){
      $(".message-box").removeClass("u-hide");
      $(".message-box-content").focus();
  });
 
});
Run Pen

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.min.js