style.css

@import url('https://fonts.googleapis.com/css2?family=Poppins:ital,wght@0,100;0,200;0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,100;1,200;1,300;1,400;1,500;1,600;1,700;1,800;1,900&display=swap');
*{
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
  scroll-behavior: smooth;
}
:root{
  --first-color: #1abc9c;
  --second-color: #072030;
  --third-color: #fff;
}
.dark-theme{
  --first-color: #1abc9c;
  --third-color: #072030;
  --second-color: #fff;
}
#icon{
  filter: invert(1);
  width: 25px;
  height: 25px;
  margin-left: 30px;
  cursor: pointer;
  transition: 0.5s;
 
}
#icon:hover{
  transform:scale(1.5) ;
}

section{
  padding: 100px 200px;
  background-color: var(--third-color);
}

header #main-span{
  float: right;
  font-size: 30px;
  cursor: pointer;
  color:#2c3e50;
}
header #main-span:hover{
  color: #fff;
  transition: 0.4s;
}
header #main-span:hover ul{
  display: block;
}
.colors{
  list-style: none;
  width: 30px;
  height: 30px;
  margin: 15px auto;
  border-radius: 50%;
  border: 3px solid #fff;
  cursor: pointer;
}
#green{
  background: #1abc9c;
}
#blue{
  background: #0056d2 ;
}
#purple{
  background: #9b59b6;
}
#pink{
  background: #ff7ba7;
}
#yellow{
  background: #f1c40f;
}
#red{
  background:#e74c3c;
}
#orange{
  background: #e67e22;
}
ul{
  background: var(--first-color);
  width: 70px;
  position: fixed;
  top: 50px;
  border-radius:0 0 10px 10px;
  display:none;
}

.btn{
  color: #fff;
  background: var(--first-color);
  font-size: 1em;
  font-weight: 600;
  text-decoration: none;
  padding: 10px 20px;
  border-radius: 6px;
  margin-bottom: 20px;
  transition: 0.5s ease;
}

.btn:hover{
  color: var(--first-color);
  background:#fff;
  border:2px solid var(--first-color);
}

header{
  z-index: 1;
  position: sticky;
  background: var(--first-color);
  top: 0;
  left: 0;
  width: 100%;
  padding: 15px 200px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: 0.5s ease;
}

header .brand{
  color:#fff;
  font-size: 1.7em;
  font-weight: 700;
  text-decoration: none;
}

header .navigation{
  position: relative;
}

header .navigation a{
  color:#fff;
  font-size: 1.15em;
  font-weight: 500;
  text-decoration: none;
  margin-left: 30px;
}

header .navigation a:hover{
  
  color:#003153;
}

.main .content{
  position: relative;
  width: 100%;
  display: flex;
  justify-content: space-between;
}

.main .content .col-right{
  position: relative;
  width: 50%;
}

.main .content .col-left{
  position: relative;
  width: 45%;
}

.main .content .col-right .img-card{
  position: relative;
  width: 100%;
  min-height: 450px;
}

.main .content .col-right .img-card img{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;

}

.main .content .col-left .content-title{
  color: var(--second-color);
  font-size: 3.5em;
  font-weight: 800;
  margin-bottom: 30px;
}
b{
  color: var(--first-color);
}

.main .content .col-left .paragraph-text{
  color: var(--second-color);
  font-size: 2em;
  margin-bottom: 40px;
}

body{
  min-height: 110vh;
}

.title{
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
}

.section-title{
  position: relative;
  color: var(--first-color);
  font-size: 2.2em;
  font-weight: 800;
  margin-bottom: 60px;
}

.section-title:before{
  content: '';
  position: absolute;
  top: 56px;
  left: 50%;
  width: 140px;
  height: 4px;
  background: var(--first-color);
  transform: translateX(-50%);
}

.section-title:after{
  content: '';
  position: absolute;
  top: 50px;
  left: 50%;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  background: var(--first-color);
  transform: translateX(-50%);
}

.about .content{
  position: relative;
  width: 100%;
  display: flex;
  justify-content: space-between;
  margin-top: 20px;
}

.about .content .col-left{
  position: relative;
  width: 45%;
}

.about .content .col-right{
  position: relative;
  width: 50%;
}

.about .content .col-left .img-card{
  position: relative;
  width: 100%;
  min-height: 450px;
}

.about .content .col-left .img-card img{
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 10px;
}

.about .content .col-right .content-title{
  color: var(--second-color);
  font-size: 2em;
  font-weight: 800;
  margin-bottom: 20px;
}

.about .content .col-right .paragraph-text{
  color: var(--second-color);
  font-size: 1em;
  margin-bottom: 40px;
}

.languages .content{
  display: flex;
  justify-content: space-evenly;
  flex-wrap: wrap;
  flex-direction: row;
}
.title{
  font-size: 1em;
  width: 100%;
}
.languages .content .card{
  background: var(--third-color);
  margin: 20px;
  width: 250px;
  padding: 20px;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  box-shadow: 0 5px 25px rgba(1 1 1 / 15%);
  border-radius: 20px;
  box-shadow: 0 4px 8px 0 var(--first-color), 0 6px 20px 0 var(--first-color);
}
.languages .content .card .languages-img{
 display: flex;
 align-items: center;
 justify-content: center;
}

.developers .content{
  display: flex;
  justify-content: space-evenly;
  flex-wrap: wrap;
  flex-direction: row;
  margin-top: 20px;
}

.title{
  font-size: 1em;
  width: 100%;
}

.developers .content .card{
  background: var(--third-color);

  width: 340px;
  padding: 20px;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  box-shadow: 0 5px 25px rgba(1 1 1 / 15%);
  border-radius: 20px;
  box-shadow: 0 4px 8px 0 var(--first-color), 0 6px 20px 0 var(--first-color);
}

.developers .content .card .info{
  text-align: center;
}

.developers .content .card .info h3{
  color: var(--first-color);
  font-size: 1.2em;
  font-weight: 700;
  margin: 10px;
}
.developers .content .card .info p{
  color: var(--second-color);
  
}
.developers .content .card .info .social-icons{
  margin-top: 30px;
  margin-right: 20px;
  width: 30px;
  height: 30px;
}

.contact .content{
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  flex-direction: column;
  margin-top: 20px;
}

.contact .content .row{
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  flex-direction: row;
}

.contact .content .row .card{
  background: var(--third-color);
  width: 240px;
  margin: 20px;
  padding: 25px;
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  box-shadow: 0 5px 25px rgba(1 1 1 / 15%);
  border-radius: 10px;
  box-shadow: 0 4px 8px 0 var(--first-color), 0 6px 20px 0 var(--first-color);
}

.contact .content .row .card .contact-icon{
  color: var(--first-color);
  font-size: 4em;
  text-align: center;
  transition: transform 0.5s ease;
}

.contact .content .row .card:hover .contact-icon{
  transform: translateY(-10px);
}

.contact .content .row .card .info{
  text-align: center;
}

.contact .content .row .card .info h3{
  color: var(--second-color);
  font-size: 1.2em;
  font-weight: 700;
  margin: 10px;
}

.contact .content .row .card .info span{
  color:var(--second-color);
  font-weight: 500;
}

.contact-form{
  background:var(--first-color);
  max-width: 600px;
  margin-top: 50px;
  padding: 50px;
  border-radius: 10px;
  box-shadow: 0 5px 25px rgba(1 1 1 / 15%);
}

.contact-form h3{
  color: #fff;
  font-size: 1.6em;
  font-weight: 600;
  text-align: center;
  margin-bottom: 40px;
}

.contact-form .input-box{

  position: relative;
  width: 100%;
  margin-bottom: 20px;

}

::placeholder{
  color: #fff;

}

.contact-form .input-box input,
.contact-form .input-box textarea{
  color: #fff;
  background-color: var(--first-color);
  width: 100%;
  padding: 10px;
  font-size: 1em;
  font-weight: 400;
  outline: none;
  border: 3px solid #fff;
  border-radius: 18px;
  resize: none;
}

.contact-form .input-box .send-btn{
  color: #fff;
  background: var(--first-color);
  border: 3px solid #fff;
  display: inline-block;
  font-size: 1.1em;
  font-weight: 500;
  width: 100%;

  cursor: pointer;
  transition: 0.5s ease;
}

.contact-form .input-box .send-btn:hover{
  color: var(--first-color);
  background: #fff;
}

.footer{
  background: var(--second-color);
  color: var(--third-color);
  text-align: center;
  padding: 2em;
}

.footer .footer-title{
  font-size: 20px;
  font-weight: 600;
}

.footer p{
  font-size: 16px;
  margin-top: 10px;
}

.footer p a{
  color: var(--first-color);
  font-weight: 600;
  text-decoration: none;
}

@media (max-width: 1040px){
  header{
    padding: 12px 20px;
  }

  header.sticky{
    padding: 10px 20px;
  }

  header .navigation{
    display: none;
  }

  header .navigation.active{
    z-index: 888;
    position: fixed;
    background: var(--third-color);
    top: 0;
    right: 0;
    width: 330px;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    box-shadow: 0 5px 25px rgba(1 1 1 / 15%);
    transition: 0.3s ease;
  }

  header .navigation a{
    color: var(--second-color);
    font-size: 1.2em;
    margin: 10px;
    padding: 0 20px;
    border-radius: 20px;
  }

  header .navigation a:hover{
    background: var(--first-color);
    color: var(--third-color);
    transition: 0.3s ease;
  }

  .menu-btn{
    position: absolute;
    background: url(frontend-images/menu.png)no-repeat;
    background-size: 30px;
    background-position: center;
    width: 40px;
    height: 40px;
    right: 0;
    margin: 0 20px;
    cursor: pointer;
    transition: 0.3s ease;
  }

  .menu-btn.active{
    z-index: 999;
    background: url(frontend-images/close.png)no-repeat;
    background-size: 25px;
    background-position: center;
    transition: 0.3s ease;
    filter: invert(1);
  }

  section{
    padding: 80px 20px;
  }

  .main .content h2{
    font-size: 1em;
  }
  .main .content{
    flex-direction: column;
  }

  .main .content .column{
    position: relative;
    width: 100%;
  }

  .main .content .col-right{
    margin-top: 40px;
  }

  .section-title{
    font-size: 1.8em;
  }

  .about .content{
    flex-direction: column;
  }

  .about .content .column{
    position: relative;
    width: 100%;
  }

  .about .content .col-right{
    margin-top: 40px;
  }

  .contact-form{
    padding: 35px 40px;
  }
}

.scrollToTop-btn{
  z-index: 999;
  position: fixed;
  background: var(--first-color);
  color: #fff;
  width: 45px;
  height: 45px;
  right: 0;
  bottom: 10px;
  font-size: 22px;
  text-align: center;
  line-height: 45px;
  border-radius: 3px;
  cursor: pointer;
  pointer-events: none;
  opacity: 0;
  transition: all 0.3s ease;
}

.scrollToTop-btn.active{
  right: 20px;
  opacity: 1;
  pointer-events: auto;
}

.reveal{
  position: relative;
  transform: translateY(50px);
  opacity: 0;
  transition: all 1.5s ease;
}

.reveal.active{
  transform: translateY(0);
  opacity: 1;
}

@media (max-width: 1000px){
#icon{
  filter: invert(0);
  margin: 0px;
}
}