```css
/* ===========================================
   RESET CSS
=========================================== */


html,
body {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
}



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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Inter", sans-serif;
    background: #02040c;
    color: white;
}


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

header {
    position: absolute;
    top: 0;
    left: 0;

    width: 100%;
    padding: 30px 8%;

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

    z-index: 10;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;

    font-size: 42px;
    font-weight: 800;
}

.logo img {
    width: 55px;
}

.violet {
    color: #8e4dff;
}


/* ===========================================
   MENU
=========================================== */

nav {
    display: flex;
    gap: 35px;
}

nav a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    font-size: 18px;
    transition: 0.3s;
}

nav a:hover {
    color: #8cff00;
}


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

.hero {
    position: relative;

    height: 100vh;

    display: flex;
    align-items: center;

    padding-left: 10%;

    background: url("background.png");
    background-size: cover;
    background-position: center;
}

.overlay {
    position: absolute;
    inset: 0;

    background: linear-gradient(
        90deg,
        rgba(0, 0, 0, 0.75) 20%,
        rgba(0, 0, 0, 0.40) 50%,
        rgba(0, 0, 0, 0.10)
    );
}

.hero-content {
    position: relative;
    z-index: 5;

    max-width: 750px;
    margin-top: 80px;
}

.small-title {
    margin-bottom: 25px;

    color: #8cff00;
    font-size: 15px;
    letter-spacing: 4px;
}

.hero h1 {
    margin-bottom: 40px;

    font-size: 74px;
    line-height: 1.05;
    font-weight: 800;
}

.description {
    max-width: 700px;
    margin-bottom: 55px;

    color: #d4d4d4;
    font-size: 22px;
    line-height: 1.8;
}


/* ===========================================
   BOUTONS
=========================================== */

.buttons {
    display: flex;
    gap: 25px;
}

.btn-green {
    padding: 18px 35px;

    background: #8cff00;
    color: black;

    text-decoration: none;
    font-weight: 700;

    border-radius: 40px;
}

.btn-border {
    padding: 18px 35px;

    border: 1px solid white;
    border-radius: 40px;

    color: white;
    text-decoration: none;
}


/* ===========================================
   SERVICES
=========================================== */

.services {
    padding: 120px 10%;
    background: #060914;
}

.services h2 {
    margin-bottom: 70px;
    font-size: 48px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 35px;
}

.card {
    padding: 40px;

    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;

    backdrop-filter: blur(10px);
    transition: 0.3s;
}

.card:hover {
    transform: translateY(-8px);
    border-color: #8cff00;
}

.card h3 {
    margin-bottom: 20px;

    color: #8cff00;
    font-size: 24px;
}

.card p {
    color: #bfbfbf;
    line-height: 1.8;
}


/* ===========================================
   PRESENTATION
=========================================== */

.about {
    padding: 120px 10%;
    text-align: center;
}

.about h2 {
    margin-bottom: 40px;
    font-size: 48px;
}

.about p {
    max-width: 900px;
    margin: auto;

    color: #d0d0d0;
    font-size: 22px;
    line-height: 2;
}


/* ===========================================
   CONTACT
=========================================== */

.contact {
    padding: 120px 10%;
    text-align: center;
    background: #060914;
}

.contact h2 {
    margin-bottom: 40px;
    font-size: 48px;
}

.contact p {
    margin-top: 20px;
    font-size: 28px;
}

.contact a {
    color: white;
    text-decoration: none;
}

.contact a:hover {
    color: #8cff00;
}


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

footer {
    padding: 35px;

    text-align: center;
    color: #777;

    background: #02040c;
}


/* ===========================================
   RESPONSIVE
=========================================== */

@media (max-width: 900px) {

    header {
        flex-direction: column;
        gap: 25px;
    }

    nav {
        display: none;
    }

    .hero {
        padding: 30px;
    }

    .hero h1 {
        font-size: 52px;
    }

    .description {
        font-size: 18px;
    }

}
```