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HTML 

              
                <!DOCTYPE html>
<html lang="en">
    <head>
        <title>My super cool & responsive website!</title>

        <!-- Main Stylesheet -->
        <link rel="stylesheet" type="text/css" href="style.css">

        <!-- Google Font -->
        <link rel="preconnect" href="https://fonts.gstatic.com">
        <link href="https://fonts.googleapis.com/css2?family=Poppins:wght@300;500;600&display=swap" rel="stylesheet">
    </head>
    <body>
        
        <section class="hero-banner-section flex flex-ac">
            <div class="container">
                <div class="text-wrap">
                    <h1 class="tc-wht ta-center">Welcome to my super cool website about avocados!</h1>
                    <div class="btn-wrap flex-jc">
                        <a href="about.html" class="btn">Read More</a>
                    </div>
                </div>
            </div>
        </section>

    </body>
</html>
!

CSS 

              
                /* My External CSS File */


/* 1. Setup/Resets */
* {
    padding: 0;
    margin: 0;
    max-width: 100%;
    overflow: hidden;
    position: relative;
}

body {
    min-height: 100vh;
    overflow: auto;
}

a {
    text-decoration: none;
}

/* 2. Universal Elements */

/* Variables */
:root {
    --primary-color: #50330C;
    --accent-color: #68BA84;
    --offwhite-color: #F8F8F8;
    --white-color: #FFFFFF;
    --text-color: #939393;
    --font-main: 'Poppins', sans-serif;
    --font-weight-light: 300;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
}

/* Button */
.btn {
    display: block; 
    padding: 25px 40px;
    text-align: center;
    min-width: 140px; 
    font-size: 14px;
    line-height: 30px;
    font-weight: var(--font-weight-medium);
    color: var(--white-color);
    background: var(--accent-color);
    transition: 0.4s all ease-in-out;
}
@media (hover: hover) {
    .btn:hover {
        background: var(--primary-color);
    }
}

.btn-wrap {
    display: flex;
    margin-top: 30px; 
}

/* Typography */
body {
   font-family: var(--font-main); 
}

h1 {
   font-size: 43px;
   line-height: 51px;
   letter-spacing: 0;
   color: var(--primary-color);
   font-weight: var(--font-weight-semibold);
}

h2 {
   font-size: 33px;
   line-height: 45px;
   letter-spacing: 0;
   color: var(--primary-color);
   font-weight: var(--font-weight-semibold);
}

p {
    font-size: 14px;
    line-height: 30px;
    letter-spacing: 0;
    color: var(--text-color);
    font-weight: var(--font-weight-light);
}

/* Responsive - Medium Tablet */
@media only screen and (max-width: 991px) {
    h1 {
        font-size: 32px;
        line-height: 42px;
    }
}


/* 3. Ready Classes */

/* Flexbox Ready Classes */
.flex {
    display: flex;
}
.flex-sb {
    justify-content: space-between;
}
.flex-ac {
    align-items: center;
}
.flex-jc {
    justify-content: center;
}
.flex-ae {
    align-items: flex-end;
}
.flex-je {
    justify-content: flex-end;
}
.flex-col {
    flex-direction: column;
}
.flex-wrap {
    flex-wrap: wrap;
}


/* Width Ready Classes */

/* 20% wide */
.twenty {
  width: 20%;
}

/* 25% wide */
.twenty-five {
  width: 25%;
}

/* 30% wide */
.thirty {
  width: 30%;
}

/* 35% wide */
.thirty-five {
  width: 35%;
}

/* 40% wide */
.forty {
  width: 40%;
}

/* 45% wide */
.forty-five {
  width: 45%;
}

/* 50% wide */
.fifty {
  width: 50%;
}

/* 55% wide */
.fifty-five {
  width: 55%;
}

/* 60% wide */
.sixty {
  width: 60%;
}

/* 70% wide */
.seventy {
  width: 70%;
}

/* 75% wide */
.seventy-five {
  width: 75%;
}

/* 80% wide */
.eighty {
  width: 80%;
}

/* 100% wide */
.full {
  width: 100%;
}


/* Containers */

.container {
    width: 100%;
    max-width: 1350px;
    margin: 0 auto;
    padding: 100px 50px;
}

.container-large {
    width: 100%;
    margin: 0 auto;
    padding: 0 50px;
}

@media only screen and (max-width: 1070px) {
    .container {
        padding: 50px 20px;
    }
    .container-large {
        padding: 0 20px; 
    }
}


/* Background Colors */

.bg-white {
    background: var(--white-color);
}

.bg-offwhite {
    background: var(--offwhite-color);
}

.bg-primary {
    background: var(--primary-color)
}

.bg-accent {
    background: var(--accent-color);
}


/* Text Colors */

.tc-wht {
    color: var(--white-color);
}

.tc-prim {
    color: var(--primary-color);
}

.tc-acc {
    color: var(--accent-color);
}


/* Text Alignment */

.ta-center {
    text-align: center;
}

.ta-right {
    text-align: right;
}


/******************************************************/
/******************************************************/
/******************** SITE HEADER *********************/
/******************************************************/
/******************************************************/

header.main-header {
    padding: 10px 0; 
    position: relative;
    overflow: visible; 
}
header.main-header .nav-menu {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}
header.main-header .menu-item {
    padding: 0 15px; 
}
header.main-header .menu-item a {
    display: block;
    color: var(--text-color);
    font-size: 14px;
    line-height: 30px;
    font-weight: var(--font-weight-semibold);
    position: relative;
    transition: 0.4s all ease-in-out;
}
header.main-header .menu-item a:after {
    content: "";
    position: absolute;
    bottom: 0px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: 0.4s all ease-in;
}
header.main-header .menu-item a.active:after {
    width: 100%; 
}

@media (hover: hover) {
    header.main-header .menu-item a:hover {
        color: var(--accent-color); 
    }
    header.main-header .menu-item a:hover:after {
        width: 100%;
    }
}

.hamburger {
    display: none;
    position: relative;
    width: 25px; 
    z-index: 6;
}
.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-color);
    margin-bottom: 5px; 
}

.mobile-nav-menu {
    display: none;
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    max-width: 500px;
    z-index: 5; 
}

/* Responsive - Large Tablet  */
@media only screen and (max-width: 1070px) {
    .hamburger {
        display: block;
    }
    .mobile-nav-menu {
        display: block;
    }
}


/******************************************************/
/******************************************************/
/**************** HERO BANNER SECTION *****************/
/******************************************************/
/******************************************************/

.hero-banner-section {
    background: url(https://cdn.freshfruitportal.com/2020/09/Palta.shutterstock_261520853-1.jpg) no-repeat center / cover;
    height: 50vw; 
    max-height: 700px;
    min-height: 300px; 
}
.hero-banner-section .text-wrap {
    max-width: 588px;
    margin: 0 auto; 
}

/* Responsive - Phone */
@media only screen and (max-width: 600px) {
  .hero-banner-section {
    height: auto;
  }
}
!

JS
!
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