css
/* =========================================
   IDEAL INTERNET
   PROJETO 02 — LANDING PAGE
   ESTÉTICA BRANCA / PREMIUM / CLEAN
========================================= */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: #ffffff;
    color: #111111;
    line-height: 1.6;
}

img {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
}


/* =========================================
   HEADER
========================================= */

.header {
    position: fixed;
    top: 0;
    left: 0;

    width: 100%;
    height: 78px;

    background: rgba(255, 255, 255, 0.94);

    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);

    border-bottom: 1px solid #eeeeee;

    z-index: 1000;
}

.header-content {
    width: 90%;
    max-width: 1180px;
    height: 100%;

    margin: 0 auto;

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

.header .logo {
    display: flex;
    align-items: center;

    transform: translateX(-10px);
}

.header .logo img {
    width: 70px !important;
    max-width: 70px !important;
    height: auto !important;
}

.back-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 9px 16px;

    border: 1px solid #dedede;
    border-radius: 5px;

    color: #555555;

    font-size: 12px;
    font-weight: 500;

    transition: 0.3s ease;
}

.back-button:hover {
    background: #f6f6f6;
    border-color: #cccccc;

    color: #111111;

    transform: translateY(-1px);
}


/* =========================================
   HERO
========================================= */

.landing-hero {
    position: relative;

    min-height: 820px;

    padding: 175px 0 120px;

    display: flex;
    align-items: center;

    overflow: hidden;

    background:
        radial-gradient(
            circle at 75% 45%,
            rgba(83, 111, 232, 0.09),
            transparent 34%
        ),
        #ffffff;
}

.hero-background {
    position: absolute;

    width: 600px;
    height: 600px;

    right: -180px;
    top: 120px;

    border: 1px solid rgba(83, 111, 232, 0.1);

    border-radius: 50%;

    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;

    width: 90%;
    max-width: 1180px;

    margin: 0 auto;
}

.hero-label {
    display: block;

    margin-bottom: 25px;

    color: #536fe8;

    font-size: 10px;
    font-weight: 700;

    letter-spacing: 3px;
}

.hero-content h1 {
    max-width: 800px;

    margin-bottom: 28px;

    font-size: clamp(54px, 7vw, 86px);

    font-weight: 400;

    line-height: 0.98;

    letter-spacing: -5px;
}

.hero-content h1 span {
    color: #536fe8;
}

.hero-content > p {
    max-width: 570px;

    margin-bottom: 38px;

    color: #6d6d6d;

    font-size: 15px;

    line-height: 1.85;
}

.hero-actions {
    display: flex;

    align-items: center;

    gap: 18px;
}

.primary-button {
    display: inline-flex;

    align-items: center;
    justify-content: center;

    padding: 14px 24px;

    background: #111111;

    color: #ffffff;

    border-radius: 5px;

    font-size: 13px;
    font-weight: 600;

    transition: 0.3s ease;
}

.primary-button:hover {
    background: #536fe8;

    transform: translateY(-2px);

    box-shadow:
        0 12px 30px rgba(83, 111, 232, 0.18);
}

.secondary-button {
    display: inline-flex;

    align-items: center;

    padding: 13px 4px;

    color: #555555;

    font-size: 12px;
    font-weight: 500;

    border-bottom: 1px solid #cccccc;

    transition: 0.3s ease;
}

.secondary-button:hover {
    color: #536fe8;

    border-color: #536fe8;
}


/* =========================================
   PROJECT
========================================= */

.project-section {
    padding: 140px 0;

    background: #f7f7f5;
}

.project-container {
    width: 90%;
    max-width: 1180px;

    margin: 0 auto;

    display: grid;

    grid-template-columns: 1.15fr 0.85fr;

    gap: 90px;

    align-items: center;
}

.project-image {
    position: relative;
}

.project-image::before {
    content: "";

    position: absolute;

    width: 100%;
    height: 100%;

    top: 18px;
    left: 18px;

    border: 1px solid #dddddd;

    border-radius: 6px;

    z-index: 0;
}

.project-image img {
    position: relative;
    z-index: 1;

    width: 100%;

    background: #ffffff;

    border: 1px solid #dddddd;

    border-radius: 6px;

    box-shadow:
        0 25px 60px rgba(0, 0, 0, 0.10);

    transition: 0.4s ease;
}

.project-image img:hover {
    transform: translateY(-5px);

    box-shadow:
        0 35px 75px rgba(0, 0, 0, 0.14);
}

.project-description {
    max-width: 500px;
}

.section-label {
    display: block;

    margin-bottom: 20px;

    color: #536fe8;

    font-size: 10px;
    font-weight: 700;

    letter-spacing: 3px;
}

.project-description h2 {
    margin-bottom: 25px;

    font-size: clamp(40px, 5vw, 58px);

    font-weight: 400;

    line-height: 1.05;

    letter-spacing: -3px;
}

.project-description p {
    margin-bottom: 20px;

    color: #6d6d6d;

    font-size: 14px;

    line-height: 1.85;
}

.text-link {
    display: inline-block;

    margin-top: 15px;

    color: #111111;

    font-size: 12px;
    font-weight: 600;

    border-bottom: 1px solid #bbbbbb;

    padding-bottom: 5px;

    transition: 0.3s ease;
}

.text-link:hover {
    color: #536fe8;

    border-color: #536fe8;
}


/* =========================================
   STRUCTURE
========================================= */

.structure {
    padding: 140px 0;

    background: #ffffff;
}

.structure-container {
    width: 90%;
    max-width: 1180px;

    margin: 0 auto;
}

.structure-heading {
    max-width: 600px;

    margin-bottom: 65px;
}

.structure-heading h2 {
    font-size: clamp(40px, 5vw, 60px);

    font-weight: 400;

    line-height: 1.05;

    letter-spacing: -3px;
}

.structure-list {
    max-width: 900px;

    border-top: 1px solid #dddddd;
}

.structure-item {
    display: grid;

    grid-template-columns: 70px 1fr;

    gap: 25px;

    padding: 34px 0;

    border-bottom: 1px solid #dddddd;

    transition: 0.3s ease;
}

.structure-item:hover {
    padding-left: 8px;
}

.structure-item > span {
    color: #536fe8;

    font-size: 10px;
    font-weight: 700;

    letter-spacing: 2px;
}

.structure-item h3 {
    margin-bottom: 8px;

    font-size: 20px;

    font-weight: 500;
}

.structure-item p {
    max-width: 650px;

    color: #707070;

    font-size: 13px;

    line-height: 1.8;
}


/* =========================================
   DIFFERENCE
========================================= */

.difference {
    padding: 140px 0;

    background: #f7f7f5;
}

.difference-container {
    width: 90%;
    max-width: 1180px;

    margin: 0 auto;

    display: grid;

    grid-template-columns: 1fr 1fr;

    gap: 100px;

    align-items: start;
}

.difference-container h2 {
    max-width: 500px;

    font-size: clamp(40px, 5vw, 60px);

    font-weight: 400;

    line-height: 1.05;

    letter-spacing: -3px;
}

.difference-container > div:last-child {
    max-width: 600px;
}

.difference-container p {
    margin-bottom: 25px;

    color: #6d6d6d;

    font-size: 15px;

    line-height: 1.9;
}

.difference-container p:last-child {
    margin-bottom: 0;
}


/* =========================================
   FINAL CTA
========================================= */

.final-cta {
    padding: 150px 0;

    text-align: center;

    background:
        radial-gradient(
            circle at center,
            rgba(83, 111, 232, 0.08),
            transparent 40%
        ),
        #ffffff;

    border-top: 1px solid #eeeeee;
}

.final-container {
    width: 90%;
    max-width: 850px;

    margin: 0 auto;
}

.final-container .section-label {
    margin-bottom: 20px;
}

.final-container h2 {
    margin-bottom: 25px;

    font-size: clamp(44px, 6vw, 72px);

    font-weight: 400;

    line-height: 1;

    letter-spacing: -4px;
}

.final-container p {
    max-width: 600px;

    margin: 0 auto 38px;

    color: #777777;

    font-size: 15px;

    line-height: 1.8;
}

.whatsapp-button {
    display: inline-flex;

    align-items: center;
    justify-content: center;

    padding: 14px 25px;

    background: #111111;

    color: #ffffff;

    border-radius: 5px;

    font-size: 13px;
    font-weight: 600;

    transition: 0.3s ease;
}

.whatsapp-button:hover {
    background: #536fe8;

    transform: translateY(-2px);

    box-shadow:
        0 12px 30px rgba(83, 111, 232, 0.18);
}

.home-link {
    display: block;

    margin-top: 25px;

    color: #777777;

    font-size: 12px;

    transition: 0.3s ease;
}

.home-link:hover {
    color: #111111;
}


/* =========================================
   FOOTER
========================================= */

.footer {
    padding: 32px 0;

    background: #ffffff;

    border-top: 1px solid #eeeeee;
}

.footer-content {
    width: 90%;
    max-width: 1180px;

    margin: 0 auto;

    display: flex;

    align-items: center;
    justify-content: space-between;

    gap: 30px;
}

.footer .logo {
    display: flex;
    align-items: center;
}

.footer .logo img {
    width: 70px !important;
    max-width: 70px !important;
    height: auto !important;
}

.footer p {
    color: #777777;

    font-size: 11px;
}


/* =========================================
   TABLET
========================================= */

@media (max-width: 950px) {

    .project-container {
        grid-template-columns: 1fr;

        gap: 70px;
    }

    .project-description {
        max-width: 700px;
    }

    .difference-container {
        grid-template-columns: 1fr;

        gap: 50px;
    }
}


/* =========================================
   MOBILE
========================================= */

@media (max-width: 650px) {

    .header {
        height: 70px;
    }

    .header-content {
        width: 92%;
    }

    .header .logo {
        transform: translateX(-5px);
    }

    .header .logo img {
        width: 62px !important;
        max-width: 62px !important;
    }

    .back-button {
        padding: 8px 13px;

        font-size: 11px;
    }


    .landing-hero {
        min-height: auto;

        padding: 125px 0 95px;
    }

    .hero-content {
        width: 92%;
    }

    .hero-content h1 {
        font-size: 48px;

        letter-spacing: -3px;
    }

    .hero-content > p {
        font-size: 14px;
    }

    .hero-actions {
        flex-direction: column;

        align-items: flex-start;

        gap: 18px;
    }

    .primary-button {
        width: 100%;
    }


    .project-section {
        padding: 100px 0;
    }

    .project-container {
        width: 92%;

        gap: 60px;
    }

    .project-image::before {
        top: 10px;
        left: 10px;
    }

    .project-description h2 {
        font-size: 40px;

        letter-spacing: -2px;
    }


    .structure {
        padding: 100px 0;
    }

    .structure-container {
        width: 92%;
    }

    .structure-heading {
        margin-bottom: 50px;
    }

    .structure-heading h2 {
        font-size: 40px;

        letter-spacing: -2px;
    }

    .structure-item {
        grid-template-columns: 45px 1fr;

        gap: 18px;

        padding: 30px 0;
    }


    .difference {
        padding: 100px 0;
    }

    .difference-container {
        width: 92%;
    }

    .difference-container h2 {
        font-size: 40px;

        letter-spacing: -2px;
    }


    .final-cta {
        padding: 110px 0;
    }

    .final-container {
        width: 92%;
    }

    .final-container h2 {
        font-size: 43px;

        letter-spacing: -2px;
    }


    .footer-content {
        width: 92%;

        flex-direction: column;

        text-align: center;
    }

    .footer .logo img {
        width: 65px !important;
        max-width: 65px !important;
    }
}