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HTML

              
                <body class="black-theme">
<div id="switch">
  <i class="fas fa-sun"></i>
</div>
<div class="container">
  <div class="card">
    <div class="card__top">
      <img src="https://cdn.pixabay.com/photo/2016/10/26/23/24/colors-1772977_1280.jpg" alt="Sky">
       <div class="profile__photo">
      <img src="https://images.pexels.com/photos/415829/pexels-photo-415829.jpeg?auto=compress&cs=tinysrgb&dpr=1&w=500" alt="Profile Photo">
    </div>
    </div>
   
    <div class="card__content">
      <h2>Alison Doe</h2>
      <h3>Web Designer</h3>
      <p><span><i class="fas fa-map-marker-alt"></i></span>Paris, France</p>
       <p><span><i class="far fa-building"></i></span>Fantasy Company Inc.</p>
      <p><span><i class="far fa-envelope"></i></span><a href="#">alison@fantasy.com</a></p>
      <a href="#" class="button">Read More</a>
    </div>
  </div>
</div>
  </body>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css2?family=Lato:wght@400;700&display=swap');
$black:rgba(0,0,0,0.85);
  $white:#fff;
*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

.black-theme{
  display:flex;
  justify-content:center;
  align-items:center;
  background:#161623;
  position:relative;
  min-height:100vh;
  overflow:hidden;
  font-family: 'Lato', sans-serif;
  letter-spacing:0.5px;
  font-weight:400;
  
  &:before{
    position:absolute;
    content:"";
    left:40%;
    bottom:-40%;
    width:600px;
    height:600px;
    background:linear-gradient(#FF5722, #FF9800);
    border-radius:50%;
  }
  
  .card{
    width:350px;
    height:500px;
    box-shadow:0 15px 35px rgba(0,0,0,0.5);
    border-radius:10px;
    background: rgba(255,255,255,0.05);
    backdrop-filter:blur(10px);
    overflow:hidden;
    
    .card__top{
       height:155px;
           position:relative;
      img{
        width:100%;
       height:100%;
        object-fit:cover;
      }
      
         .profile__photo{
      width:130px;
      height:130px;
    position: absolute;
    bottom: -60px;
left:50%;
           transform:translatex(-50%);
   
      img{
        width:100%;
        border-radius:50%;
        height:100%;
        object-fit:cover;
           border:7px solid rgba(0,0,0,0.35);

      }
    }
    }
    .card__content{
      text-align:center;
      color:#fff;
      padding:5em 2.5em;
      h2{
        font-weight:700;
          font-size:24px;
      }
      h3{
        font-weight:400;
        margin:5px 0 30px;
        font-size:16px;
      }
      
      p{
             text-align:left;
        
        span{
          margin-right:10px;
        }
        a{
          text-decoration:none;
          color:#fff;
          &:hover{
            text-decoration:underline;
          }
        }

      }
      p+p{
        margin-top:10px;
      }
      
    }
    a.button{
          text-decoration:none;
          color:#fff;
      background:rgba(0,0,0,0.85);
      padding:9px 30px 10px 30px;
      display:inline-block;
      margin-top:2em;
      
      &:hover{
         background:rgba(0,0,0,0.7);
      }
    }
  }
}

.white-theme{
  display:flex;
  justify-content:center;
  align-items:center;
background-color: #3fe2f2;
background-image: linear-gradient(135deg, #3fe2f2 0%, #43dbc0 16%, #29b7f2 49%, #3cabe8 86%);
  position:relative;
  min-height:100vh;
  overflow:hidden;
  font-family: 'Lato', sans-serif;
  letter-spacing:0.5px;
  font-weight:400;
  
  &:before{
    position:absolute;
    content:"";
    left:40%;
    bottom:-40%;
    width:600px;
    height:600px;
background: linear-gradient(135deg, #3fe2f2 0%, #43dbc0 24%, #3cabe8 91%);
    border-radius: 50%;
  }
  
  .card{
    width:350px;
    height:500px;
background: rgba( 255, 255, 255, 0.30 );
box-shadow: 0 8px 32px 0 rgba( 31, 38, 135, 0.37 );
backdrop-filter: blur( 4px );
border-radius: 10px;
    overflow:hidden;
    
    .card__top{
       height:155px;
           position:relative;
      img{
        width:100%;
       height:100%;
        object-fit:cover;
      }
      
         .profile__photo{
      width:130px;
      height:130px;
    position: absolute;
    bottom: -60px;
left:50%;
           transform:translatex(-50%);
   
      img{
        width:100%;
        border-radius:50%;
        height:100%;
        object-fit:cover;
           border:8px solid rgba(255,255,255,0.55);

      }
    }
    }
    .card__content{
      text-align:center;
      color:$black;
      padding:5em 2.5em;
      h2{
        font-weight:700;
          font-size:24px;
      }
      h3{
        font-weight:400;
        margin:5px 0 30px;
        font-size:16px;
      }
      
      p{
             text-align:left;
        
        span{
          margin-right:10px;
        }
        a{
          text-decoration:none;
          color:$black;
          &:hover{
            text-decoration:underline;
          }
        }

      }
      p+p{
        margin-top:10px;
      }
      
    }
    a.button{
          text-decoration:none;
          color:$white;
      background:$black;
      padding:9px 30px 10px 30px;
      display:inline-block;
      margin-top:2em;
      
      &:hover{
         background:rgba(0,0,0,0.7);
      }
    }
  }

}

  #switch{
    position:absolute;
    top:35px;
    right:35px;
    background:$white;
    border-radius:50px;
    width:50px;
    height:50px;
    display:flex;
    justify-content:center;
    align-items:center;
    cursor:pointer;
    
    &:hover i{
      animation:rotation 1.5s linear forwards infinite;
    }
    
    i{
      font-size:1.5rem;
    }
    @keyframes rotation{
      0%{
        transform:rotate(0deg);
      }
       100%{
        transform:rotate(360deg);
      }
    }
  }
              
            
!

JS

              
                const black_theme = document.querySelector(".black-theme");

const change = document.querySelector("#switch");


change.addEventListener("click",changeTheme);


function changeTheme(){
  if(document.body.classList.contains("black-theme")){
   document.body.classList.remove("black-theme");
    document.body.classList.add("white-theme");
   change.innerHTML ='<i class="fas fa-moon"></i>';
     }else{
        document.body.classList.remove("white-theme");
    document.body.classList.add("black-theme");
         change.innerHTML ='<i class="fas fa-sun"></i>';
     }
}
              
            
!
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