style.css

:root {
    --cl-white: hsl(0, 0%, 100%);
    --cl-black: hsl(0, 0%, 7%);
    --cl-grey-light: hsl(0, 0%, 61%);
    --cl-grey: hsl(0, 0%, 12%);
    --cl-grey-dark: hsl(0, 0%, 9%);
    --cl-red-light: hsl(0, 85%, 59%);
    --cl-red: hsl(356, 76%, 45%);
}

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font: inherit;
}

html {
    scroll-behavior: smooth;
    font-size: 62.5%;
    overflow-x: hidden;
}

body {
    min-width: 100%;
    min-height: 100vh;
    background-color: var(--cl-black);
    color: var(--cl-white);
    font-family: 'POPPINS', sans-serif;
    line-height: 1.5;
}

img {
    width: 100%;
}

ul {
    list-style: none;
}

a {
    color: var(--cl-black);
    text-decoration: none;
}

button {
    background-color: transparent;
    border: none;
    outline: none;
}

@media (prefers-reduced-motion: reduce) {
    html:focus-within {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* utility class */

.container {
    padding: 0 10rem;
}

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

.card__btn {
    color: var(--cl-red);
    font-size: 1.2rem;
}

.button {
    text-align: center;
    text-transform: uppercase;
    font-size: 1.7rem;
    letter-spacing: 0.1rem;
    padding: 1rem 3rem;
    border-radius: 2px;
    color: var(--cl-white);
    background-color: var(--cl-red-light);
}

/* Header section */

.header {
    padding: 1.5rem 10rem 1.5rem 6rem;
}

.header__logo {
    width: 12rem;
    cursor: pointer;
}

.header__nav ul li:not(:last-child) {
    margin-right: 4rem;
}

.header__nav ul li a {
    font-size: 1.3rem;
    color: var(--cl-white);
    cursor: pointer;
}

/* hero */

.hero__left {
    flex: 1;
    margin-left: -2rem;
    margin-top: -5rem;
}

.hero__right {
    flex: 1;
}

.hero__right h3 {
    font-size: 2rem;
    letter-spacing: 0.4rem;
    color: var(--cl-red);
}

.hero__right h1 {
    font-size: 7rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

.hero__right p {
    font-size: 1.3rem;
    letter-spacing: 0.2rem;
    margin-bottom: 3rem;
}

.hero__right .btn {
    padding: 0.8rem 4rem;
    background-color: var(--cl-red);
    color: var(--cl-white);
    font-size: 2rem;
    letter-spacing: 0.2rem;
    text-transform: uppercase;
    border-radius: 0.2rem;
}

/* card section */

.cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding: 17rem 20rem 5rem 20rem;
    position: relative;
}

.cards::before {
    content: '';
    display: block;
    width: 80rem;
    height: 70rem;
    position: absolute;
    background-color: var(--cl-grey-dark);
    z-index: -1;
}

.card-1 {
    max-width: 37rem;
    min-height: 30rem;
    padding: 2.5rem;
    margin-top: -10rem;
    background-color: var(--cl-grey);
}

.card-active {
    background-color: var(--cl-red);
}

.card__logo {
    width: 6rem;
    margin-bottom: 1.5rem;
}

.card-1 .card__content h3 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.card-1 .card__content p {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
}

.card-1 .card__btn-active {
    color: var(--cl-white);
}

.card-2 {
    background-color: transparent;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.card-2 h2 {
    font-size: 5rem;
    font-weight: bolder;
    color: var(--cl-red);
}

.card-2 h4 {
    font-size: 2rem;
    font-weight: bold;
}

.card-3 {
    grid-column: 2 / -1;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.card {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background-color: var(--cl-grey);
    padding: 2rem;
}

.card h2 {
    font-size: 3rem;
    color: var(--cl-red);
}

.card h4 {
    font-size: 1.5rem;
}

/* projects */

.projects {
    padding: 10rem 20rem;
    margin-bottom: 5rem;
}

.projects__header {
    margin-bottom: 10rem;
}

.projects__header-left h2 {
    font-size: 3.5rem;
    line-height: 1;
    margin-bottom: 2rem;
    font-weight: bolder;
    letter-spacing: 0.2rem;
}

.projects__header-left p {
    font-size: 1.5rem;
    color: var(--cl-grey-light);
}

.projects__cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.projects__card-img {
    min-width: 100%;
    max-height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 4rem 2rem;
    background-color: var(--cl-grey);
    margin-bottom: 3rem;
}

.projects__card-img img {
    width: 100%;
    height: 30rem;
}

.projects__card h3 {
    font-size: 1.5rem;
}

/* contact */

.contact {
    max-width: 80%;
    min-height: 100%;
    margin: 0 auto;
    padding: 5rem 4rem;
    background-color: var(--cl-grey);
    margin-bottom: 5rem;
}

.contact__left h1 {
    font-size: 4rem;
    padding-right: 20rem;
    line-height: 1;
    margin-bottom: 1.5rem;
}

.contact__left p {
    font-size: 1.5rem;
    letter-spacing: 0.2rem;
    padding-right: 20rem;
    color: var(--cl-grey-light);
}

.contact__right {
    margin-right: 15rem;
}

/* footer */

.footer__nav {
    margin-bottom: 2.5rem;
}

.footer__nav ul {
    justify-content: center;
}

.footer__nav ul li {
    margin-right: 2rem;
}

.footer__nav ul li a {
    color: var(--cl-white);
    font-size: 1.5rem;
}

.footer__logo {
    width: 10rem;
}

.footer__social-icon img {
    width: 3rem;
    height: 3rem;
}

.footer__icons {
    justify-content: space-between;
    background-color: var(--cl-grey-dark);
    padding: 2rem 15rem;
}

.footer__social-icons {
    margin-right: 40%;
}

.footer__social-icon {
    padding-right: 4rem;
}

/* media query */

@media screen and (max-width: 1320px) {
    .hero__left {
        margin-left: 0;
    }
    .contact__left h1 {
        font-size: 3rem;
        padding-right: 10rem;
    }
    .contact__right {
        margin-right: 10rem;
    }

    .footer__social-icons {
        margin-right: 30%;
    }
}
@media screen and (max-width: 960px) {
    .hero__right h3 {
        font-size: 1.5rem;
        letter-spacing: 0.4rem;
        color: var(--cl-red);
    }
    .hero__right h1 {
        font-size: 4rem;
        font-weight: 500;
        line-height: 1;
    }
    .hero__right p {
        font-size: 1rem;
    }
    .hero__right .btn {
        padding: 0.8rem 2rem;
    }

    .cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .cards::before {
        content: '';
        display: block;
        width: 60rem;
        height: 100rem;
        position: absolute;
        background-color: var(--cl-grey-dark);
        z-index: -1;
    }
    .card-1 {
        margin-bottom: 1rem;
    }
    .card-13 {
        margin-top: 1rem;
    }

    .card-3 {
        grid-column: 1 / -1;
    }

    .projects__card-img img {
        width: 20rem;
        height: 20rem;
    }
    .projects {
        padding: 0 0;
        margin: 2rem 4rem;
        text-align: center;
    }
    .contact__left h1 {
        font-size: 2rem;
        padding-right: 5rem;
    }
    .contact__left p {
        padding-right: 15rem;
    }
    .contact__right {
        margin-right: 5rem;
    }
    .footer__social-icons {
        margin-right: 20%;
    }
}

@media screen and (max-width: 768px) {
    .button {
        font-size: 1rem;
        padding: 1rem 1.5rem;
    }

    .header {
        padding: 1rem;
    }
    .header__nav ul li:not(:last-child) {
        margin-right: 2rem;
    }
    .header__nav ul li a {
        font-size: 0.8rem;
    }
    .hero__right h3 {
        font-size: 1rem;
        letter-spacing: 0.4rem;
        color: var(--cl-red);
    }
    .hero__right h1 {
        font-size: 2.5rem;
        font-weight: 500;
        line-height: 1;
    }
    .hero__right p {
        font-size: 0.9rem;
    }
    .hero__right .btn {
        padding: 0.8rem 1.5rem;
    }
    .contact__left p {
        padding-right: 2srem;
    }
    .contact__right {
        margin-right: 0;
    }
    .footer__social-icons {
        margin-right: 10%;
    }
}
@media screen and (max-width: 550px) {
    .header__nav {
        display: none;
    }
    .hero__left {
        margin-top: 5rem;
        margin-bottom: 3rem;
    }
    .hero__right {
        width: 100%;
        padding: 0;
        text-align: center;
    }

    .hero {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }

    .cards {
        margin-top: 13rem;
        grid-template-columns: 1fr;
        padding: 0 2rem;
    }
    .cards::before {
        display: none;
    }
    .card-1 {
        text-align: center;
    }
    .card__logo {
        margin-left: 40%;
    }

    .card-active {
        margin-top: 2rem;
        margin-bottom: 2rem;
    }

    .projects__header {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .projects__header-left p {
        margin-bottom: 2rem;
    }
    .projects__header-left {
        text-align: center;
    }
    .projects__cards {
        grid-template-columns: 1fr;
    }
    .contact {
        flex-direction: column;
        text-align: center;
    }
    .contact__left h1 {
        font-size: 2rem;
        padding-right: 0;
        margin-bottom: 2rem;
    }
    .contact__left p {
        font-size: 1rem;
        padding-right: 0;
        margin-bottom: 2rem;
    }
    .footer__nav > ul {
        align-items: center;
        flex-wrap: wrap;
    }
    .footer__icons {
        flex-direction: column;
        justify-content: center;
        align-items: center;
    }
    .footer__logo {
        margin-bottom: 2rem;
    }
    .footer__social-icon img {
        width: 2rem;
        height: 2rem;
    }
    .footer__social-icons {
        margin-right: 0%;
    }
}