Responsive Website with HTML / CSS

style.scss

$dark: #0d1113;
$blue: #3a86f9;
$red: #f84443;

*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
    scroll-behavior: smooth;
}

body{
    min-height: 1000px;
    background: $dark;
}

.cta{
    position: relative;
    border-radius: 5px;
    color: white;
    background: $red;
    padding: 15px 20px;
    display: table;
    text-decoration: none;
    margin: 30px auto;
    text-align: center;
    text-transform: uppercase;
    font-size: 1.2rem;
}

header{
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 40px 100px;
    z-index: 1000;
    transition: .6;
    color: white;

    .logo a{
        position: relative;
        font-weight: bold;
        color: $dark;
        font-size: 1.4rem;
        text-decoration: none;
        text-transform: uppercase;
    }

    nav{
        ul{
            position: relative;
            display: flex;
            justify-content: center;
            align-items: center;

            li{
                position: relative;
                list-style: none;

                a{
                    position: relative;
                    margin: 0 15px;
                    text-decoration: none;
                    color: $dark;
                    letter-spacing: 2px;
                    font-weight: 300;
                    transition: .6s;
                }
            }
        }
    }

    //STICKY HEADER
    &.sticky{
        padding: 15px 100px;
        background: white;
        border-bottom: 1px solid rgba(0,0,0,.1);
        transition: .6s;

        .logo a, nav ul li a{
            color: black;
        }
    }
}

//SECTIONS
.cover{
    position: relative;
    width: 100%;
    min-height: 100vh;
    background: url('https://wpflames.com/demo/landing/project-022/images/bg.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: bottom;
    display: flex;
    justify-content: center;
    align-items: center;

    h2{
        color: black;
        font-size: 5rem;
        text-transform: uppercase;
        text-align: center;

        span{
            font-weight: 800;
            color: $dark;
        }
    }

    h3{
        color: black;
        font-size: 3rem;
        text-align: center;
    }
}

.sec{
    background: white;
    padding: 100px;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;

    .content{
        position: relative;
        text-align: center;
        width: 100%;

        div{
            max-width: 800px;
            margin: 0 auto;

            
        }
    }
}

h2{
    margin-bottom: 20px;
    font-weight: 200;
    font-size: 4rem;
    letter-spacing: 1px;
}

h3{
    margin-bottom: 20px;
    font-weight: 300;
    font-size: 2rem;
    letter-spacing: 1px;
}

p{
    font-size: 1.2rem;
    line-height: 2;
    margin-bottom: 30px;
    
}

.btn{
    position: relative;
    display: inline-block;
    padding: 10px 20px;
    background: $dark;
    text-decoration: none;
    color: white;
    border-radius: 5px;
    font-weight: 500;
    font-size: 1.2rem;
    transition: .6s;

    &:hover{
        background: $blue;
    }
}

#services{
    display: block;

    .box-wrapper{
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        grid-gap: 50px;
        max-width: 100%;
        margin-top: 40px;
        
        .box{
            margin: 0 auto;
            background: white;
            padding: 20px;
            box-shadow: 0 15px 30px rgba(0,0,0,.05);
            .iconBx{
                img{
                    width: 80px;
                    display: block;
                    margin: 30px auto;
                }
            }
        }
    }
}

#stat{
    background: $dark;
    color: white;
    padding-top: 250px;
    margin-top: -250px;
    .statsBx{
        position: relative;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        grid-gap: 20px;
        margin-top: 40px;
        max-width: 1100px;

        h3{
            font-size: 4rem;
            letter-spacing: 2px;
        }
        h4{
            font-size: 2rem;
            font-weight: 300;
        }
    }
}

#portfolio{
    .workBx{
        position: relative;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        grid-gap: 30px;
        max-width: 1100px;
        margin-top: 50px;

        .brand{
            position: relative;
            background: $dark;
            min-height: 250px;
            width: 250px;
            margin: 0 auto;
            display: flex;
            justify-content: center;
            align-items: center;
            transition: .6s !important;

            &:hover{
                background: $blue;
                
            }

            &:hover a{
                transition: none;
                color: white;
                
            }

            a{
                color: rgba(255,255,255,.4);
                text-decoration: none;
                font-weight: 300;
                letter-spacing: 2px;

                h4{
                    font-weight: 500;
                    font-size: 1.5rem;
                }
            }
        }
    }
}

#team{
    .teamBx{
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        grid-gap: 30px;
        max-width: 1100px;

        .profile{
            position: relative;
            overflow: hidden;
            img{
                max-width: 100%;
            }

            .details{
                position: absolute;
                background: black;
                width: 100%;
                height: 100%;
                top: 0;
                left: 0;
                color: white;
                display: flex;
                justify-content: center;
                align-items: center;
                flex-direction: column;
                opacity: 1;
                transition: .6s;
                transform: translateY(-100%);

                h4{
                    font-size: 1.4rem;
                }
                p{
                    font-size: 1rem;
                }
            }

            //PROFILE
            &:hover .details{
                opacity: .8;
                transform: translateY(0);
            }
        }
    }
}


#contact{
    background: black;
    color: white;

    .content{
        .contactForm{
            position: relative;
            max-width: 800px;
            margin: 0 auto;
            display: flex;

            form{
                width: 100%;
            }

            .row100{
                display: flex;
                width: 100%;

                .inputBx50{
                    width: 50%;
                    margin: 0 20px;
                }

                .inputBx100{
                    height: 100px;
                }


                .inputBx100, .inputBx50{
                    width: 100%;
                    margin: 0 20px;

                    input, textarea{
                        position: relative;
                        border: none;
                        border-bottom: 1px solid white;
                        color: white;
                        background: transparent;
                        width: 100%;
                        padding-top: 10px;
                        outline: none;
                        font-weight: 300;
                        margin: 20px 0;
                    }
                    input[placeholder], textarea[placeholder], input[type="submit"]{
                        font-size: 1.2rem;
                    }

                    input[type="submit"]{
                        background: $blue;
                        max-width: 100px;
                        padding-bottom: 10px;
                        border-bottom-style: none;
                        border-radius: 5px;
                        margin-top: 40px;
                        text-transform: uppercase;
                        font-weight: 500;       
                        cursor: pointer;
                        letter-spacing: 2px;
                    }
                }
            }
        }
    }

    .social{
        ul{
            display: flex;
            justify-content: space-between;
            margin: auto;
            width: 200px;
            margin-top: 30px;

            li{
                list-style: none;

                a{
                    transition: .6s;

                    img{
                        transform: scale(0.3);
                        filter: invert(1);
                        transition: .6s;
                    }

                    &:hover img{
                        opacity: .5;
                    }
                }
            }
        }
    }
}




footer{
    padding-top: 20px;
    .copyright{
        color: white;
        text-align: center;
        font-size: 1rem;

        a{
            color: white;
        }
    }
}

.toggle{
    display: none;
}



@media(max-width: 992px){
    .toggle{
        display: block;
        position: relative;
        width: 30px;
        height: 30px;
        cursor: pointer;

        &:before{
            content: '';
            position: absolute;
            top: 4px;
            width: 100%;
            height: 2px;
            background: black;
            z-index: 1;
            box-shadow: 0 10px 0 black;
            transition: .6s;
        }

        &:after{
            content: '';
            position: absolute;
            bottom: 4px;
            width: 100%;
            height: 2px;
            background: black;
            z-index: 1;
            transition: .6s;
        }
    }

    header{
        padding: 5px 50px;
        background: white;
        height: 60px;
        border-bottom: 0px solid rgba(0,0,0,.5);

        

        &.active ul{
            visibility: visible;
            opacity: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            transform: translateX(0);

            li{
                margin: 15px 0;
                a{
                    font-size: 20px;
                    margin: 5px 0;
                    display: inline-block;
                }
            }
        }

        nav{
            ul{
                position: absolute;
                top: 60px;
                left: 0;
                width: 100%;
                height: 100vh;
                text-align: center;
                overflow: auto;
                background: white;
                visibility: hidden;
                opacity: 0;
                flex-direction: column;
                transform: translateX(-100%);
            }
        }

        .logo a, nav ul li a{
            color: black;
        }
    }

    h2{
        font-size: 2.8rem;
        padding: 0 0px;
    }

    .cover{
        background-position: center;
    }

    .sec{
        padding: 100px 50px 50px;
    }

    #contact{
        .row100{
            flex-direction: column;
            overflow: hidden;

            .inputBx50{
                width: 100%;
                margin: 0;
            }
        }
    }

    .cover{
        background-image: linear-gradient(0deg, rgba(0,0,0,0.5) 50%, rgba(0,0,0,0.85) 100%), url('/../images/bg.jpg');
        color: white;
        padding: 20px;

        h2{ 
            font-size: 3rem;
            color: white;
            span{
                color: white;
            }
        }
        h3{ 
            font-size: 2rem;
            color: white;
        }
    }


}