*{
    padding: 0;
    margin: 0;
    text-decoration: none;
    list-style: none;
    box-sizing: border-box;
    font-family: 'Gill Sans', 'Gill Sans MT', Calibri, 'Trebuchet MS', sans-serif;
  }

  /* width */
::-webkit-scrollbar {
  width: 2px;
  height: 0px;
}

/* Track */
::-webkit-scrollbar-track {
  box-shadow: inset 0 0 5px rgb(0, 0, 0); 
  border-radius: 10px;
  background-color: #000;
}
 
/* Handle */
::-webkit-scrollbar-thumb {
  background: red; 
  border-radius: 10px;
}

/* Handle on hover */
::-webkit-scrollbar-thumb:hover {
  background: #ff0000; 
}

  
html,
body {
    /*width: 100%;
    height: 100%;*/
    /*overflow: hidden;*/
    /*display: flex;*/
    background-color: #000000;
}

/****************** nav bar ********************/
nav{
    background: rgba(0, 0, 0, 0); 
    height: 80px;
    width: 100%;
    position: fixed;
    z-index: 3;
    top: 0px;
}

.logo{
    width: 100px;
    height: 60px;
    margin: 20px 0 0 30px;
}
  
nav ul{
    float: right;
    margin-right: 20px;
}

nav ul li{
    display: inline-block;
    line-height: 80px;
    margin: 0 5px;
}

nav ul li a{
    color: white;
    font-size: 17px;
    padding: 7px 13px;
    border-radius: 3px;
    text-transform: uppercase;
}

a.active,a:hover{
    background: #1b9bff;
    transition: .5s;
}

.checkbtn{
    font-size: 30px;
    color: white;
    float: right;
    line-height: 80px;
    margin-right: 40px;
    cursor: pointer;
    display: none;
}

#check{
    display: none;
}

@media (max-width: 952px){

  label.logo{
      font-size: 30px;
      padding-left: 50px;
  }

  nav ul li a{
      font-size: 16px;
    }
  }

@media (max-width: 858px){

  .checkbtn{
      display: block;
  }

  ul{
      position: fixed;
      width: 100%;
      height: 100vh;
      background: #2c3e50;
      top: 80px;
      left: -100%;
      text-align: center;
      transition: all .5s;
  }

  nav ul li{
      display: block;
      margin: 50px 0;
      line-height: 30px;
  }

  nav ul li a{
      font-size: 20px;
  }

  a:hover,a.active{
      background: none;
      color: #0082e6;
  }
  #check:checked ~ ul{
      left: 0;
    }
  }
/***************** section **********************/
.sec_1{
    /*margin-top: 80px;*/
    height: 100vh;
    width: 100%;
    /*background-color: #2c3e50;*/
    background-image: url("../images_services/programming.jpg");
    background-position: center;
    background-repeat: no-repeat;
    background-size: cover;
}

.sec_1_div{
    padding-top: 20%;
    padding-left: 5%;
}
.sec_1_div h1{
    width: 54%;
    background-color: #ffffff9a;
    font-size: 50px;
    border-radius: 10px;
}

.sec_1_div p{
    color: #ffffff;
    font-size: 25px;
    width: 50%;
    background-color: #00000093;
}

/*************** fleche down *****************/
.arrow {
    position: absolute;
    border: solid rgb(236, 10, 10);
    border-width: 0 7px 7px 0;
    display: inline-block;
    padding: 3px;
    height: 50px;
    width: 50px;
    bottom: 7%;
    left: 50%;
  }

  .arrow_1 {
    position: absolute;
    border: solid rgb(255, 0, 0);
    border-width: 0 7px 7px 0;
    display: inline-block;
    padding: 3px;
    height: 50px;
    width: 50px;
    bottom: 3%;
    left: 50%;
  }

  .down {
    transform: rotate(45deg);
    -webkit-transform: rotate(45deg);
  }

/********************section proje********************/
body {
  flex-direction: column;
}
.proje_content_1{
    margin: 80px 0 0 0;
    height: 88vh;
    width: 100%;
    /*border-style: ridge;
    border-color: #ff0000;*/
    border-radius: 1%;
    display: flex;
}
.proje_content{
    margin: 10px 0 0 0;
    height: 80vh;
    width: 100%;
    /*border-style: ridge;
    border-color: #ff0000;*/
    border-radius: 1%;
    display: flex;
}

.div_proje_foto{
    height: 100%;
    width: 50%;
    /*border-style: ridge;
    border-color: #1b9bff;*/
    justify-content: center;
    padding: 1%;
}

.div_proje_text h1{
    color: aliceblue;
    text-align: center;
    font-size: 30px;
    /*padding-top: 2%;
    padding-bottom: 2%;*/
}

iframe {
  height: 100%;
  width: 100%;
  /*width : 560px; 
  height :315px;*/
}

.div_proje_foto img{
    padding: 10%;
    object-fit: contain;
    justify-content: center;
    height: 80%;
    width: 100%;
}

.div_proje_text{
    padding: 3% 0 3% 8%;
    height: 100%;
    width: 50%;
    /*border-style: ridge;
    border-color: #5cff1b;*/
    overflow-y : scroll;
    /*background-color: #2c2929;*/
}

.div_proje_text p{
    color: #ffffff;
    text-align: justify;
    text-justify: inter-word;
    line-height: 25px;
    font-size: 18px;
}
.div_proje_text h2{
    margin-top: 3%;
    color: #00e1ff;
    text-align: justify;
}
.f{
    font-size: 30px;
  }
  .f a{
    color: #09ff00;
  }

hr{
    margin:3% 10% 3% 10%;
}
/************* footer ***********/
.footer{
  color: #ffffff;
/*    position: absolute; */
  text-align: center;
  bottom: 20px;
  width: 100%;
  left: 0px;
  font-size: 15px;
  background-color: black;
}
.footer p{
  text-align: center;
}
.footer a{
  color: #ffffff;
  text-decoration: none;
}

/*********** css responsive **********/
@media (max-width: 858px){
  /*********** section 1*****************/

.sec_1_div{
    padding-top: 70%;
    padding-left: 5%;
    padding-right: 5%;
}
.sec_1_div h1{
    width: 100%;
    background-color: #ffffff9a;
    font-size: 35px;
    border-radius: 10px;
}

.sec_1_div p{
    color: #ffffff;
    font-size: 20px;
    width: 100%;
    background-color: #00000093;
}
/*************** fleche down *****************/
.arrow {
  position: absolute;
  border: solid rgb(236, 10, 10);
  border-width: 0 7px 7px 0;
  display: inline-block;
  padding: 3px;
  height: 50px;
  width: 50px;
  bottom: 7%;
  left: 45%;
}

.arrow_1 {
  position: absolute;
  border: solid rgb(255, 0, 0);
  border-width: 0 7px 7px 0;
  display: inline-block;
  padding: 3px;
  height: 50px;
  width: 50px;
  bottom: 3%;
  left: 45%;
}
  /************************************/
    .proje_content_1{
        display: flex;
        flex-direction: column;
    }
    .proje_content{
        display: flex;
        flex-direction: column;
    }
    .div_proje_foto{
        height: 50%;
        width: 100%;
        /*border-style: ridge;
        border-color: #1b9bff;*/
    }
    
    .div_proje_foto h1{
        padding-top: 5%;
        color: aliceblue;
        text-align: center;
        font-size: 30px;
    }
    .div_proje_text{
        padding: 3%;
        height: 50%;
        width: 100%;
        /*border-style: ridge;
        border-color: #5cff1b;*/
        overflow-y: scroll;
    }
    .div_proje_text h2{
        margin-top: 5%;
        color: #ffffff;
        text-align: justify;
    }

}