stick.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@200;300;400;500;600;700&display=swap');
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Poppins" , sans-serif;
}
.tooltip{
  color: #000;
}
.sidebar{
  position: fixed;
  left: 0;
  top: 0;
  height: 100%;
  width: 78px;
  background: #11101D;
  padding: 6px 14px;
  z-index: 99;
  transition: all 0.5s ease;
}
.sidebar.open{
  width: 250px;
}
.sidebar .logo-details{
  height: 60px;
  display: flex;
  align-items: center;
  position: relative;
}
.sidebar .logo-details .icon{
  opacity: 0;
  transition: all 0.5s ease;
}
.sidebar .logo-details .logo_name{
  color: #fff;
  font-size: 20px;
  font-weight: 600;
  opacity: 0;
  transition: all 0.5s ease;
}
.sidebar.open .logo-details .icon,
.sidebar.open .logo-details .logo_name{
  opacity: 1;
}
.sidebar .logo-details #btn{
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  font-size: 22px;
  transition: all 0.4s ease;
  font-size: 23px;
  text-align: center;
  cursor: pointer;
  transition: all 0.5s ease;
}
.sidebar.open .logo-details #btn{
  text-align: right;
}
.sidebar i{
  color: #fff;
  height: 60px;
  min-width: 50px;
  font-size: 28px;
  text-align: center;
  line-height: 60px;
}
.sidebar .nav-list{
  margin-top: 20px;
  height: 100%;
}
.sidebar li{
  position: relative;
  margin: 8px 0;
  list-style: none;
}
.sidebar li .tooltip{
  position: absolute;
  top: -20px;
  left: calc(100% + 15px);
  z-index: 3;
  background: #fff;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.3);
  padding: 6px 12px;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 400;
  opacity: 0;
  white-space: nowrap;
  pointer-events: none;
  transition: 0s;
}
.sidebar li:hover .tooltip{
  opacity: 1;
  pointer-events: auto;
  transition: all 0.4s ease;
  top: 50%;
  transform: translateY(-50%);
}
.sidebar.open li .tooltip{
  display: none;
}
.sidebar input{
  font-size: 15px;
  color: #FFF;
  font-weight: 400;
  outline: none;
  height: 50px;
  width: 100%;
  width: 50px;
  border: none;
  border-radius: 12px;
  transition: all 0.5s ease;
  background: #1d1b31;
}
.sidebar.open input{
  padding: 0 20px 0 50px;
  width: 100%;
}
.sidebar .bx-search{
  position: absolute;
  top: 50%;
  left: 0;
  transform: translateY(-50%);
  font-size: 22px;
  background: #1d1b31;
  color: #FFF;
}
.sidebar.open .bx-search:hover{
  background: #1d1b31;
  color: #FFF;
}
.sidebar .bx-search:hover{
  background: #FFF;
  color: #11101d;
}
.sidebar li a{
  display: flex;
  height: 100%;
  width: 100%;
  border-radius: 12px;
  align-items: center;
  text-decoration: none;
  transition: all 0.4s ease;
  background: #11101D;
}
.sidebar li a:hover{
  background: #FFF;
}
.sidebar li a .links_name{
  color: #fff;
  font-size: 15px;
  font-weight: 400;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: 0.4s;
}
.sidebar.open li a .links_name{
  opacity: 1;
  pointer-events: auto;
}
.sidebar li a:hover .links_name,
.sidebar li a:hover i{
  transition: all 0.5s ease;
  color: #11101D;
}
.sidebar li i{
  height: 50px;
  line-height: 50px;
  font-size: 18px;
  border-radius: 12px;
}
.sidebar li.profile{
  position: fixed;
  height: 60px;
  width: 78px;
  left: 0;
  bottom: -8px;
  padding: 10px 14px;
  background: #1d1b31;
  transition: all 0.5s ease;
  overflow: hidden;
}
.sidebar.open li.profile{
  width: 250px;
}
.sidebar li .profile-details{
  display: flex;
  align-items: center;
  flex-wrap: nowrap;
}
.sidebar li img{
  height: 45px;
  width: 45px;
  object-fit: cover;
  border-radius: 6px;
  margin-right: 10px;
}
.sidebar li.profile .name,
.sidebar li.profile .job{
  font-size: 15px;
  font-weight: 400;
  color: #fff;
  white-space: nowrap;
}
.sidebar li.profile .job{
  font-size: 12px;
}
.sidebar .profile #log_out{
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateY(-50%);
  background: #1d1b31;
  width: 100%;
  height: 60px;
  line-height: 60px;
  border-radius: 0px;
  transition: all 0.5s ease;
}
.sidebar.open .profile #log_out{
  width: 50px;
  background: none;
}
.home-section{
  position: relative;
  background: #10121a;
  color: #FFF;
  min-height: 100vh;
  top: 0;
  left: 78px;
  width: calc(100% - 78px);
  transition: all 0.5s ease;
  z-index: 2;
  display: flex;
  height: 100vh;
  position: fixed;
  width: 100%;
}
.sidebar.open ~ .home-section{
  left: 250px;
  width: calc(100% - 250px);
}
.home-section .text{
  font-size: 25px;
  font-weight: 500;
  margin: 18px;
  top: 50%;
  
}
@media (max-width: 420px) {
  .sidebar li .tooltip{
    display: none;
  }
}
html,
body {
  height: 100%;
  margin: 0;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  cursor: pointer;
}

.container {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
}
#game{
    width: 90%;
    height: 90%;
}
#score {
  position: absolute;
  top: 30px;
  right: 30px;
  font-size: 2em;
  font-weight: 900;
}

#introduction {
  width: 200px;
  height: 150px;
  position: absolute;
  font-weight: 600;
  font-size: 0.8em;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  text-align: center;
  transition: opacity 2s;
}

#restart {
  width: 120px;
  height: 120px;
  position: absolute;
  border-radius: 50%;
  color: white;
  background-color: red;
  border: none;
  font-weight: 700;
  font-size: 1.2em;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  display: none;
  cursor: pointer;
}

#perfect {
  position: absolute;
  opacity: 0;
  transition: opacity 2s;
}

#youtube,
#youtube-card {
  display: none;
}

@media (min-height: 425px) {
  /** Youtube logo by https://codepen.io/alvaromontoro */
  #youtube {
    z-index: 2;
    display: block;
    width: 100px;
    height: 70px;
    position: absolute;
    bottom: 20px;
    left: 20px;
    background: red;
    border-radius: 50% / 11%;
    transform: scale(0.8);
    transition: transform 0.5s;
  }

  #youtube:hover,
  #youtube:focus {
    transform: scale(0.9);
  }

  #youtube::before {
    content: "";
    display: block;
    position: absolute;
    top: 7.5%;
    left: -6%;
    width: 112%;
    height: 85%;
    background: red;
    border-radius: 9% / 50%;
  }

  #youtube::after {
    content: "";
    display: block;
    position: absolute;
    top: 20px;
    left: 40px;
    width: 45px;
    height: 30px;
    border: 15px solid transparent;
    box-sizing: border-box;
    border-left: 30px solid white;
  }

  #youtube span {
    font-size: 0;
    position: absolute;
    width: 0;
    height: 0;
    overflow: hidden;
  }

  #youtube:hover + #youtube-card {
    display: block;
    position: absolute;
    bottom: 12px;
    left: 10px;
    padding: 25px 25px 25px 130px;
    width: 300px;
    background-color: white;
  }
}