*{
    margin: 0;
    padding: 0;
    text-decoration: none;
    list-style: none;
}
body{
    box-sizing: border-box;
    font-family: arial,"arial black"'Times New Roman', Times, serif sans-serif;
    margin: 5px;
    background-image: url(images/IMG_88841.PNG); 
    background-size: cover;
    color: #c5c5c5;
}
.logo{  
    display: inline-block;  
    width: 50px;
    height: 50px;
    padding: 10px ;
   border-radius: 100%;
   border:rgb(73, 66, 138) solid 1px;
}
.navbar {
    padding: 50px;
     display: flex;
     justify-content: space-between;
     align-items: center;
     width: 100%;
     box-sizing: border-box;
 
 }
 .navbar .nav_links ul
 {
     display: flex;
 }
 .navbar .nav_links ul li{   
 margin: 25px;
 
 }
 .ok{   
    color: #09e727;
    
    }
 .navbar .menu{
     display: none;
     position: absolute;
     top: 30px;
     right: 30px;
     width: 35px;
     cursor: pointer;
 
 }
 @media screen and (max-width:900px) 
{
body .sidebar{
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    background-image: url(images/IMG_88841.PNG); 
    background-size: cover;
    color: #c5c5c5;
}

    .navbar{
        padding: 0;
    }
       /* left: 50px; */
    /* } */
    .navbar .menu{
        display: block;

    }
    .nav_links{
        top: 0;
        left: 0;
        position: absolute;
        background-color: rgba(255, 255, 255, 0.842);
        backdrop-filter: blur(10px);
        width: 100%;
        height: 100vh;
        display: flex;
        justify-content: center;
        align-items: center;
        margin-left: -100%;
        transition: all 0.5s ease;
    }
    .mobile-menu{
        margin-left:0;
    }
    .nav_links ul{
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    .navbar .nav_links ul li{
        margin: 25px 0;
        font-size: 1.2rem;
    }
    
}
/* main */
main{
    padding: 7px;
    background: linear-gradient(rgba(48, 2, 2, 0.651),rgba(0, 0, 255, 0.397), rgba(48, 2, 2, 0.644),rgba(48, 2, 2, 0.644));
}
.img_div{
    margin: 10px;
}
.img{
    width: 50%;
}
h2, h3, h4{
    margin: 10px;
}
.section_div{
    background: #c5c5c52c;
}
footer{
    text-align: center;
    color: #08e025;
 }
.sci{
    margin-top: 40px;
    display: flex;
}
.sci li{
    list-style: none;
    margin-right: 15px;
}
.sci li a{
    color: #fff;
  font-size: 2em;
}
.sci li a:hover{
   color: #fff;
}