* {
    margin: 0;
    box-sizing: border-box;
}

:root {
    --bright-red: hsl(12, 88%, 59%);
    --dark-blue: hsl(228, 39%, 23%);
    --dark-grayish-blue: hsl(227, 12%, 61%);
    --very-dark-blue: hsl(233, 12%, 13%);
    --very-pale-red: hsl(13, 100%, 96%);
    --very-light-gray: hsl(0, 0%, 98%);
    font-size: 16px;
}

body {
    font-family: "Be Vietnam Pro", sans-serif;
    font-style: normal;
    overflow-x: hidden;
    width: 100%;
    position: relative;
}

.overlay {
    background: linear-gradient(to bottom, transparent, #000);
    width: 100%; 
    height: 100%;
    position: absolute;
    z-index: 150;
    bottom: 0;
}

html {
    width: 100%;
}

header {
    width: 100%;
    position: relative;
    z-index: 999;
    overflow-x: hidden;
}

.header-container {
    width: 100%;
    height: 90px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 30px;
    position: relative;
    overflow: hidden;
    z-index: 100;
}

.mobile-nav {
    width: 90%;
    height: 280px;
    padding: 40px 0;
    gap: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    background-color: var(--very-light-gray);
    position: fixed;
    left: 50%;
    transform: translateX(-50%);
    top: 90px;
}

.menu-icon {
    cursor: pointer;
}

.mobile-nav a {
    width: 100%;
    color: var(--very-dark-blue);
    text-decoration: none;
    font-weight: 600;
    text-align: center;
}

.desktop-nav, .nav-desktop-btn {
    display: none;
}

.hide {
    display: none;
}

.hero-illustration {
    overflow: hidden;
}

.hero-illustration, .hero-container .content-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

.hero-illustration::before, .functionalities-container::before {
    content: "";
    background: url(../images/bg-tablet-pattern.svg);
    width: 80%;
    height: 900px;
    position: absolute;
    background-size: contain;
    background-repeat: no-repeat;
    right: -100px;
    top: -100px;
    overflow: hidden;
}

.hero {
    width: 90%;
    margin: auto;
    position: relative;
    z-index: 100;
}

.hero-container .content-container {
    padding: 20px 40px;
}

.hero-container .content-container h1 {
    text-align: center;
    color: var(--dark-blue);
    z-index: 100;
}

.hero-container .content-container p {
    text-align: center;
    color: var(--dark-grayish-blue);
    margin: 20px 0;
    font-weight: 300;
    line-height: 1.7;
    z-index: 100;
}

h1 {
    font-size: 2.2rem;
}

h2 {
    font-size: 1.7rem;
}

h3 {
    font-size: 1rem;
}

.cta-btn {
    width: 140px;
    height: 45px;
    background-color: var(--bright-red);
    border: none;
    outline: none;
    border-radius: 25px;
    color: var(--very-light-gray);
    font-weight: 400;
    font-family: "Be Vietnam Pro", sans-serif;
    cursor: pointer; 
    z-index: 100;
}

.cta-btn:hover {
    opacity: 0.7;
}


.functionalities-container {
    padding: 60px 30px;
    position: relative;
}

.functionalities-container::before {
    top: -380px;
    right: -250px;
    z-index: -1;
}

.functionalities-container h2 {
    color: var(--dark-blue);
    font-weight: 600;
}

.functionalities-container h2, .functionalities-container > p {
    text-align: center;
}

.functionalities-container p {
    color: var(--dark-grayish-blue);
    line-height: 1.7;
    margin: 20px 0 40px;
    padding: 0 10px;
}

.title-container {
    display: flex;
    align-items: center;
    background-color: var(--very-pale-red);
    height: 40px;
    gap: 20px;
    width: 110%;
    border-radius: 25px 0 0 25px;
    overflow-x: hidden;
}

.number-card {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--very-light-gray);
    background-color: var(--bright-red);
    height: 40px;
    width: 60px;
    border-radius: 25px;
}

.title-container h3 {
    color: var(--dark-blue);
    width: 75%;
}

.reviews-container {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.reviews-container h2 {
    margin-bottom: 100px;
    color: var(--dark-blue);
    font-weight: 800;
}

.reviews-slider {
    width: 100vw;
    height: auto;
    margin: auto;
}

.reviews-slider .slider-track {
    display: flex;
    gap: 20px;
    width: calc(100% * 4);
}

.review {
    background-color: var(--very-light-gray);
    padding: 70px 30px 30px;
    width: 80%;
    margin: 0 40px;
    position: relative;
}

.author-img {
    width: 80px;
    height: 80px;
    position: absolute;
    top: -40px;
    left: 50%;
    transform: translateX(-50%);
}

.author, .review p {
    text-align: center;
}

.author {
    color: var(--dark-blue);
    margin-bottom: 20px;
}

.review p {
    color: var(--dark-grayish-blue);
    line-height: 1.7;
}

.pagination {
    display: flex;
    justify-content: center;
    margin-top: 30px;
    margin-bottom: 20px;
    gap: 5px;
}

.slider-num {
    width: 10px;
    height: 10px;
    border: 1px solid var(--bright-red);
    border-radius: 50%;
}

.slider-num.active {
    background-color: var(--bright-red);
}

.cta-section {
    margin-top: 50px;
    background-color: var(--bright-red);
    height: 350px;
    padding: 40px;
    position: relative;    
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.cta-section::before {
    content: "";
    position: absolute;
    width: 100%;
    height: 350px;
    background: url(../images/bg-simplify-section-mobile.svg);
    background-repeat: no-repeat;
    left: 0;
    top: 20px;
    z-index: 1;
}

.cta-container .content-container {
    position: relative;
    z-index: 10;
}

.cta-section h2 {
    color: var(--very-light-gray);
    font-size: 2.4rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 20px;
}

.btn-container {
    display: flex;
    position: relative;
    z-index: 10;
}

.cta-section button {
    width: 140px;
    margin: 10px auto;
    height: 40px;
    background-color: var(--very-light-gray);
    color: var(--bright-red);
    border: none;
    outline: none;
    border-radius: 25px;
    font-family: "Be Vietnam Pro", sans-serif;
    font-weight: 600;
    cursor: pointer;
}

.cta-section button:hover  {
    color: #f25f3a38;
}

footer {
    background-color: var(--very-dark-blue);
}

.footer-container {
    display: flex;
    width: 100%;
    flex-direction: column;
    align-items: center;
    padding: 40px 30px;
}

.newsletter {
    display: flex;
    justify-content: center;
    width: 100%;
    margin: auto;
    gap: 10px;
}

.newsletter input {
    height: 40px;
    border-radius: 25px;
    border: none;
    outline: none;
    font-family: "Be Vietnam Pro", sans-serif;
}

.input-email_container {
    width: 70%;
}

.input-email_container input[type="email"] {
    width: 100%;
    padding-left: 20px;
    margin-bottom: 10px;
}

.error {
    color: var(--bright-red);
    font-size: 0.8rem;
    font-style: italic;
    margin-left: 10px;
}

.success {
    font-size: 0.8rem;
    font-style: italic;
    margin-left: 10px;
    color: var(--very-light-gray);
}

.newsletter input[type="submit"] {
    width: 80px;
    background-color: var(--bright-red);
    color: var(--very-light-gray);
    text-transform: uppercase;
    font-weight: 600;
    cursor: pointer;
}

.newsletter input[type="submit"]:hover {
    background-color: #ed9e8a;
}

.nav_footer {
    margin: 40px 0;
    width: 80%;
    display: flex;
    justify-content: space-between;
}

.nav_footer nav {
    display: flex;
    flex-direction: column;
}

.nav_footer nav a {
    text-decoration: none;
    color: var(--very-light-gray);
    padding: 10px 0;
    font-weight: 300;
    font-size: 0.9rem;
}

.nav_footer nav a:hover {
    color: var(--bright-red);
}

.social-icons {
    display: flex;
    justify-content: center;
    width: 100%;
    flex-wrap: wrap;
    gap: 30px;
}

.fa-brands {
    color: var(--very-light-gray);
    font-size: 2rem;
}

.fa-brands:hover {
    color: var(--bright-red);
}

.logo-footer {
    width: 120px;
    margin: 30px auto;
}

.copyright {
    font-size: 0.8rem;
    color: var(--dark-grayish-blue)
}

@media screen and (min-width: 768px) {
    .mobile-nav_container {
        display: none;
    }

    .functionalities-container::before {
        width: 700px;
        right: -400px;
        top: -600px;
    }

    .desktop-nav {
        display: flex;
        gap: 20px;
    }
    
    .desktop-nav a {
        text-decoration: none;
        color: var(--very-dark-blue);
        font-size: 0.9rem;
        font-weight: 500;
    }

    .desktop-nav a:hover {
        color: var(--dark-grayish-blue);
    }

    .nav-desktop-btn {
        display: flex;
        background-color: var(--bright-red);
        color: var(--very-light-gray);
        border: none;
        outline: none;
        width: 120px;
        height: 40px;
        justify-content: center;
        align-items: center;
        border-radius: 25px;
        font-family: "Be Vietnam Pro", sans-serif;
    }

    .hero-illustration::before {
        height: 1000px;
    }
}

@media screen and (min-width: 1024px) {
    .header-container {
        max-width: 1300px;
        margin: auto;
    }

    .hero-container {
        display: flex;
        flex-direction: row-reverse;
        max-width: 1400px;
        margin: auto;
        overflow-x: hidden;
    }

    .hero-container .content-container {
        margin-left: 60px;
    }

    .hero-container .content-container, .hero-illustration {
        width: 50%;
    }

    .hero-container {
        position: relative;
    }

    .hero-illustration::before {
        background-size: cover;
        top: -300px;
        right: -200px;
        width: 800px;
        height: 800px;
    }

    .hero-container .content-container {
        align-items: flex-start;
    }

    .hero-container .content-container h1, .hero-container .content-container p {
        text-align: start;
        position: relative;
        width: 70%;
    }

    .functionalities-container {
        margin-top: 60px;
        display: flex;
        width: 90%;
        margin: auto;
        max-width: 1300px;
    }

    .functionalities-container::before {
        display: none;
    }

    .functionalities-container .content-container {
        display: flex;
        flex-direction: column;
        width: 90%;
        position: relative;
    }

    .functionalities-container .content-container h2 {
        text-align: start;
    }

    .functionalities-container p {
        padding: 0;
    }

    .functionalities-container .content-container p {
        width: 70%;
        text-align: start;
    }

    .functionalities-container > .content-container::before {
        content: "";
        position: absolute;
        width: 900px;
        height: 600px;
        background: url(../images/bg-tablet-pattern.svg);
        background-repeat: no-repeat !important;
        left: -500px;
        background-size: cover;
        z-index: -1;
        bottom: -200px;
        overflow-x: hidden;
    }

    .title-container {
        background-color: transparent;
        position: relative;
    }

    .functionalities-cards {
        width: 90%;
        padding-left: 100px;
    }


    .number-card {
        position: absolute;
        left: -80px;
    }

    .card .content-container p {
        width: 90%;
    }

    .reviews-slider {
        max-width: 1300px;
        width: 100vw;
        height: auto;
        margin: auto auto 60px;
    }
    
    .reviews-slider .slider-track {
        display: flex;
        gap: 20px;
        animation: scroll 10s linear infinite;
        -webkit-animation: scroll 10s linear infinite;
        width: calc(600px * 4);
        cursor: pointer;
        padding-left: 60px;
    }
    
    .slider-track:hover {
        animation-play-state: paused;
    }
    
    .review {
        background-color: var(--very-light-gray);
        padding: 70px 30px 30px;
        width: 600px;
        height: 250px;
        position: relative;
    }
    
    @keyframes scroll {
        0% {
            transform: translateX(0);
            -webkit-transform: translateX(0);
        }
        100% {
            -webkit-transform: translateX(calc(-300px*4));
            transform: translateX(calc(-300px*4));
        }
    }

    .pagination {
        display: none;
    }

    .cta-section {
        align-items: flex-end;
        height: 250px;
    }
    
    .cta-section::before {
        background: url(../images/bg-simplify-section-desktop.svg);
        height: 250px;
        top: 0;
    }

        .cta-container {
        max-width: 1300px;
        width: 90%;
        margin: auto;
        display: flex;
        flex-direction: row;
        align-items: center;
        justify-content: center;
    }

    .cta-section .content-container h2 {
        width: 60%;
        text-align: start;
    }

    .cta-section .btn-container {
        width: 40%;
        display: flex;
        align-items: flex-end;
        position: relative;
    }

    .cta-section .btn-container button {
        position: absolute;
        right: 0;
        top: 50%;
        transform: translateY(-50%);
    }

    .footer-container {
        flex-direction: row-reverse;
        position: relative;
        align-items: flex-start;
        max-width: 1300px;
        width: 90%;
        justify-content: center;
        margin: auto;
    }

    .company-social {
        display: flex;
        flex-direction: column-reverse;
        align-items: flex-start;
        width: 20%;
    }

    .logo-footer {
        margin: 0 0 30px;
        margin-top: 8px;
    }

    .social-icons {
        gap: 10px;
        justify-content: flex-start;
    }

    .fa-brands {
        font-size: 1.2rem;
    }

    .nav_footer {
        width: 40%;
        margin: 0;
        padding-right: 50px;
    }

    .newsletter {
        width: 30%;
        margin: 0;
        margin-top: 8px;
         margin-left: 100px;
    }
    
    .copyright {
        position: absolute;
        bottom: 60px;
        right: 40px;
    }
}