style.css

*{
    margin: 0;
    padding: 0;

    list-style: none;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    user-select: none;
    text-decoration: none;
}

body{
    box-sizing: border-box;
    position: fixed;
}

.header{
    position: fixed;
    background-color: rgba(255, 0, 0, 0.584);
    display:flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100px;
    
}

.logo{
    font-size: 15px;
    padding: 30px 30px;
}

.header a{
    margin-right: 30px;
    text-decoration: none;
    color: #fff;
    font-size: 15px;
    
} 
/* 
.main{
    width: 100%;
    height: 100vh;
    display: flex;
    text-align: center;
}

.menu1{
    width: 20%;
    background-color: #121227;

}

.menu1 a{
    color: #fff;
    text-decoration: none;
    font-size: 18px;
    letter-spacing: 2px;
    display: list-item;
    padding: 30px;
    border-top: 1px solid rgb(62, 60, 60);
    border-bottom: 1px solid rgb(62, 60, 60);
}

.menu1 a:hover{
    background-color: red;
    transition: .5s;
    letter-spacing: 4px;
    text-transform: uppercase;
} */


/* ----------------------------------------------------------------- */

.sidebar{
    margin-top: 100px;
    position: fixed;
    background: #121227;
    width: 200px;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 1;

}

.sidebar li{
    margin: 50px 0;
    text-align: center;
}

.sidebar a{
    color: #fff;
    padding: 20px 30px;
}

.sidebar a:hover{
    color: red;
    margin-left: 20px;
    transition: 0.3s;
    opacity: 0.8;
}



.bloods{
    margin: 100px 150px;
    width: 100%;
    /* position: fixed; */

}

.row1{
    display: flex;
    justify-content: center;
    align-items: center;
}

.positive{
    background-color: #fff;
    box-shadow: 1px 1px 2px  rgba(0, 0, 0, 0.300);
    width: 350px;
    height: 200px;
    margin: 30px 30px;
}
.imgs{
    padding: 15px;
}

img{
    width: 50px;
    height: auto;
    margin-top: 5px;
}

.text{
    font-size: 1.5rem;
    font-weight: 600;
    text-align: center;
}

.cnt{
    font-size: 1.5rem;
    margin-top: 10px;
    font-weight: normal;
    text-align: center;
}
.row2{
    display: flex;
    justify-content: center;
    align-items: center;
}

.row3{
    display: flex;
    justify-content: center;
    align-items: center;
}


@media screen and (max-width: 1250px){
    .bloods{
        width: 70%;
        margin: 100px 200px;
    }

    .positive{
        width: 200px;
        height: 100px;
    }

    .imgs{
        padding: 10px;
        margin: 0 70px;
    }
    
    img{
        width: 25px;
        height: auto;
        margin-top: 10px;
        margin: auto;
    }

    .text{
        font-size: .8rem;
        font-weight: 600;
        text-align: center;
    }
    
    .cnt{
        font-size: .8rem;
        margin-top: 10px;
        font-weight: normal;
        text-align: center;
    }
}



@media screen and (max-width: 930px){

    .sidebar{
        margin-top: 100px;
        position: fixed;
        background: #121227;
        width: 150px;
        height: 85%;
    }

    .sidebar li{
        margin: 35px 0;
        text-align: center;
        font-size: 12px;
    }
    
    .sidebar a{
        color: #fff;
        padding: 20px 30px;
    }

    .bloods{
        width: 60%;
        margin: 120px 200px;
    }

    .positive{
        width: 130px;
        height: 70px;
        margin: 15px 15px;
    }

    .imgs{
        padding: 10px;
        margin: 0 50px;
    }
    
    img{
        width: 15px;
        height: auto;
        margin-top: 5px;
        margin: auto;
    }

    .text{
        font-size: .5rem;
        font-weight: 600;
        text-align: center;
        margin: 0 0 0 8px;
        margin-bottom: 3px;
    }
    
    .cnt{
        font-size: .5rem;
        margin-top: 4px;
        font-weight: normal;
        text-align: center;
    }
}





@media screen and (max-width: 750px){

    .sidebar{
        margin-top: 80px;
        position: fixed;
        background: #121227;
        width: 150px;
        height: 85%;
    }

    .sidebar li{
        margin: 35px 0;
        text-align: center;
    }
    
    .sidebar a{
        color: #fff;
        padding: 20px 30px;
    }

    .bloods{
        width: 40%;
        margin: 100px 190px;
    }

    .positive{
        width: 200px;
        height: 70px;
        margin: 15px 15px;
    }

    .imgs{
        padding: 10px;
        margin: 0 30px;
    }
    
    img{
        width: 15px;
        height: auto;
        margin-top: 5px;
        margin: auto;
    }

    .text{
        font-size: .5rem;
        font-weight: 600;
        text-align: center;
        margin: 0 0 0 8px;
    }
    
    .cnt{
        font-size: .5rem;
        margin-top: 3px;
        font-weight: normal;
        text-align: center;
    }
    .header{
        align-items: center;
        justify-content: space-between;
        width: 100%;
        height: 80px;
        
    }

    .logo{
        font-size: 15px;
        padding: 30px 30px;
    }
    
    .header a{
        margin-right: 30px;
        text-decoration: none;
        color: #fff;
        font-size: 15px;
        
    } 
}


@media screen and (max-width: 500px){

    .sidebar{
        margin-top: 60px;
        position: fixed;
        background: #121227;
        width: 100px;
        height: 90%;
    }

    .sidebar li{
        margin: 35px 0;
        text-align: center;
        font-size: 10px;
    }
    
    .sidebar a{
        color: #fff;
        padding: 20px 30px;
    }

    .bloods{
        width: 40%;
        margin: 80px 150px;
    }

    .positive{
        width: 100px;
        height: 55px;
        margin: 15px 6px;
    }

    .imgs{
        padding: 5px;
        margin: 0 30px;
    }
    
    img{
        width: 10px;
        margin: 0 auto;
    }

    .text{
        font-size: .5rem;
        font-weight: 600;
        text-align: center;
        margin: 0 0 0 8px;
        margin-top: -5px; 
    }
    
    .cnt{
        font-size: .5rem;
        font-weight: normal;
        text-align: center;
    }

    .header{
        align-items: center;
        justify-content: space-between;
        width: 100%;
        height: 60px;
        
    }

    .logo{
        font-size: 12px;
        padding: 30px 30px;
    }
    
    .header a{
        margin-right: 30px;
        text-decoration: none;
        color: #fff;
        font-size: 12px;
        
    } 
}


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