*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body{
    --visibitity_test: hidden ;
    --tittle:#sevrvices; 
}
/* navbar section */
 .navbar { 
    background-color: #212529 ;  
    position: sticky;
   top: 0; 
  z-index: 1;
  padding: 15px;
}
.container{
    width: 80%;
    background-color: #212529 ;
    margin: auto;
    display: flex;
    justify-content: space-between;
    align-items: center; 
}
.logo img {
    width: 100%;
   height: 25px;
   
}
.navbar .list ul{
display: flex;
}

.navbar .list li { 
    list-style: none;
    font-size: medium;
    padding-right: 20px; 
}

.navbar .list  a{
    text-decoration: none;
    text-transform: uppercase;
    color: white;
   font-size: large;
    font-family: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
letter-spacing: 0.0625em;
transition:  color 0.5s;
}

.navbar .list li:hover a{
color:yellow;
opacity: 0.9;
}
/* end of navbar section */ 
/* header section */
header{ 
   display: flex;
    background-image: url(../img/header-bg.jpg);
   background-size:cover; 
   background-position: center; 
    justify-content: center;
   align-items: center;
   height: 600px;
    }
    header .tittle{
        background-color: red 0;
        color: white;
        line-height: 50px;
       text-align: center;
        height: fit-content;
        padding-top: 40px;
        width: fit-content;
    }
    header button {
    background-color:rgb(251, 255, 22) ;
    border-radius: 10px;
    padding:20px;
    width: 25%;  
    font-weight: bold;
    font-size:large;
    margin-top: 25px;
    }
    header button:hover {
        opacity: 0.9; 
    }
    header button:hover a{
        color: black;
        opacity: 0.7;
    }
    header p {
        font-size: 65px;
        font-family: 'Poppins', sans-serif;
        font-weight: 600;
        letter-spacing: 5px;
        margin: 25px;
    }
    header button a{
        text-decoration: none;
        color: white;
        text-transform: uppercase;
    }
    header .tittle h1{
        font-size: 40px;
        font-family:Georgia, 'Times New Roman', Times, serif;
        font-weight: 400;
        padding-bottom: 20px;
    }
    /*end of header section */

    /*Services section */
 .services{
    width: 100%;
text-align: center;
margin-top: 100px;
 }
 .services .row{
    display: flex;
    width: 80%;
    margin: auto; 
 }
  .service i{
    width: 100px;
    height: 100px;
    background-color: yellow;
    border-radius: 50%;
    font-size: 50px;
    padding-top: 25px;
    margin: 10px;
  }
  .services .tittle{
    margin: 30px;
    line-height: 30px;
  }
  .services p {
    color: grey;
    font-style: italic;
    font-family:Arial, Helvetica, sans-serif;
    margin-top: 10px;
    line-height: 25px;
}
.service {
    margin-right: 30px;  
}
.services h3{
    font-weight: bold;
    font-family: sans-serif;
    letter-spacing: .05px;
    font-size: x-large;
}
.services .tittle h2{
    font-size: 40px;
    font-family: sans-serif;
    letter-spacing: 1px;
}
 /*end of services section */
 
 /*start of portfolio section */
.portfolio .container{
    background-color :black ;
    width: 80%;
    margin: auto;
}  
.img_background{
    visibility: visible;
    position: absolute;
    color: white;
    font-size: 100px;
    background-color: yellow;
    width: 100%;
    height: 100%;
    padding-top: 25%;
    font-weight: bold;
    opacity: 0.8;
    visibility: hidden;
}
.frame{
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    visibility: hidden;  
}
#plus {
    position: absolute;
    color: white;
    font-size: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    visibility: visible;
    width: 100%;
    height: 100%;
}
.portfolio .container{
    display: flex;
    flex-wrap: wrap;
}
.port img{
    width: 100%;
    visibility: visible;
}
.portfolio .row{
    display: flex; 
    margin: 20px 100px;
}
.port{
    width: 33%;
    padding: 15px;    
}
.portfolio{
    background-color: rgba(236, 227, 227, 0.918);
    text-align: center;
    margin-top: 50px;
}

#plus::after{
content: " + ";
position: absolute;
font-size: 100px;
font-weight: bold;
visibility: hidden;
}
.details { 
    background-color: white;
    height: 100px;
    margin-top: -4px;
    padding-top: 20px;
    line-height: 25px;
}

.portfolio .tittle{
    padding: 15px;
    line-height: 35px;
}
.portfolio .tittle h2{
    font-weight: 700;
    font-size: xx-large;
    padding: 5px;
    padding-top: 50px;
    text-transform: uppercase;
    font-family: "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    letter-spacing: 2px;
}
.portfolio p {
    color:gray;
    font-style: italic;
}
.frame:hover #plus::after, .frame:hover .img_background {
    visibility: visible;
  }
/* end of portfolio section */