/* style for whole page  */
        :root{
            --bg:rgb(43, 63, 63);
        }
        *{
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body{
            height: 100vh;
            width: 100vw;
            overflow-x: hidden;
        }
        .container{
            padding: 1rem 1.3rem;
        }
        .row{
            
            display: flex;
            align-items: center;
        }
        
                /* style for header */
         header{
            background-color: var(--bg);
            color: white;
        }
        .logo{
            margin: 0 auto;
            font-weight: 900;
            font-size: 2rem;
            background-color: white;
            color: var(--bg);
            border-radius: 10px;
            padding: 3px;
        }
        header nav a{
            text-decoration: none;
            color: white;
            margin-right: .5rem;
            text-transform: uppercase;
            font-size: 1rem;
            font-weight: 900;
        }
        header nav button{
            padding: 5px;
            border: none;
            outline: none;
            text-transform: uppercase;
            border-radius: 3px;
            cursor: pointer;
        } 
        
                /* style for section-1 */
        .sec1{
            background-color: rgb(43, 63, 63);
            color: white;
            text-align: center;
            
        }
        .sec1 h1{
            text-transform: uppercase;
            padding: 2rem;
            font-size: 2rem;
        }
        .sec1 p{
            width: 100%;
            margin: 1rem auto;
        }
        .sec1 a{
            display: inline-block;
            color: white;
            text-transform: uppercase;
            margin-bottom: 2rem ;
            font-weight: 900;
        }
        
                /* style for section-2 */
        .sec2{
            width: 100%;
            margin: 4rem auto;
            text-align: center;
        }
        .sec2 h2{
            font-size: 2rem;
            margin: 1rem;
            text-transform: uppercase;
        }
        
                /* style for section-3 */
        .sec3{
            background-color: whitesmoke;
        }
         .sub{
            width: 100%;
            text-align: center;
            margin: 2rem 0;
        }
        .sub div{
            width: 300px;
            height: 200px;
            background-color: var(--bg);
            margin: 0 auto;
        }
        .sec3 .sub h3{
            margin: 1rem;
            font-size: 2rem;
            text-transform: uppercase;
        }
        .sec3 .sub button{
            padding: 10px;
            background-color: whitesmoke;
            color: rgb(43, 63, 63);;
            border: 1px solid rgb(43, 63, 63);
            text-transform: uppercase;
            margin: 1rem 0;
            cursor: pointer;
        }
                /* style for section-4 */
        .sec4{
            margin: 4rem auto;
            width: 100%;
            text-align: center;
        }
        .sec4 h2{
            text-transform: uppercase;
            font-size: 2rem;
            margin: 1rem;
        }
        .sec4 button{
            margin: 1rem;
            padding: 10px;
            background-color: white;
            text-transform: uppercase;
            cursor: pointer;
            border: 1px solid rgb(43, 63, 63);
        }
        
                /* style for footer  */
        footer{
            display: none;
        }
        
        /* media query */

        @media screen and (min-width:800px){
            .wid{
                width: 50%;
                margin: 0 auto;
            }
            .sec2{
                margin: 4rem auto;
            }
            .sub{
                width: 40%;
            }
            .sec3{
                display: flex;
                justify-content: space-evenly;
            }
            
            #footer{
                display: inline-block;
                background-color:  rgb(43, 63, 63);
                color: white; 
                width: 100%;
                position: relative;
            }
            footer .cont{
                display: flex;
                justify-content: space-between;
            }
            footer .sub1 .fa-twitter{
                margin: 0 1rem;
            }
            footer .sub1 div{
                margin: 2rem 0;
            }
            footer .sub1 div h5{
                text-transform: uppercase;
                color: lightslategray;
                font-weight: 800;
            }
            footer .sub1 div a{
                text-decoration: none;
                color: white;
                margin: 1rem 0.3rem 1rem 0;
            }
            footer .sub2{
                width: 10%;
                margin: 2rem;
            }
            .sub3{
                margin: 1rem 0;
                display: flex;
                justify-content: space-between;
            }
            footer hr{
                border: 1px solid white;
            }
            footer img{
                width: 30px;
            }

        }