FreeCodeCamp/LandingPage/index.html

<style>
    body {
        background-color: rgb(237,237,237);
        font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    }

    h2 {
        margin: 0;
    }

    p {
        margin: 0;
    }

    header {
        background-color: rgb(237,237,237);
        display: flex;
        width: 100%;
        height: auto;
        position: fixed;
        top: 0px;
        left: 0px;
        padding-bottom: 40px;
    }

    footer {
        background-color: rgb(220,220,220);
        display: flex;
        flex-direction: column;
    }

    #header-img {
        width: 100%;
        height: 100%;
        max-width: 300px;
        margin: 0 auto 0 0;
    }
    
    #nav-bar {
        position: fixed;
        top: 0px;
        right: 0px;
        margin: 0 0 0 auto;
        display: flex;
        flex-direction: row;
    }

    ul {
        display: flex;
        flex-direction: row;
        list-style: none;
    }

    .nav-link {
        text-decoration: none;
        color: black;
        margin: auto 20px auto 20px;
    }

    #Login {
        display: flex;
        flex-direction: column;
        align-items: center;
        margin-top: 100px;
    }

    #form {
        display: flex;
        flex-direction: column;
        margin: auto;
        align-items: center;
    }

    .btn {
        background-color: rgb(255, 208, 0);
        color: black;
        font-weight: bold;
        border:none;
        font-size: 18px;
        padding: 8px 20px 8px 20px;
    }

    #email {
        border: none;
        width: 300px;
        height: 28px;
        padding: 6px;
        border-radius: 2px;
    }

    .form-margin {
        margin-top: 20px;
        margin-bottom: 20px;
    }

    #features {
        margin: auto;
    }

    #HowItWorks {
        display: flex;
        margin: 20px auto 40px auto;
    }

    #video {
        background-color: aquamarine;
        width: 800px;
        height: 600px;
        margin-left: auto;
        margin-right: auto;
    }

    .features-title {
        font-size: 20px;
        font-weight: bolder;
    }

    .features-item {
        display: flex;
        justify-content: center;
        align-items: center;
        margin: auto;
    }

    .icon {
        width: 30px;
        height: auto;
        margin: 60px;
    }

    #Pricing {
        background-color: blue;
        width: 940px;
        display: grid;
        grid-template-columns: 1fr 1fr 1fr;
        column-gap: 20px;
        margin: 40px auto 40px auto;
    }

    .priceItem {
        height: 300px;
        background-color: aquamarine;
        border-radius: 4px;
        border: black;
    }

    @media (max-width: 940px) {
        #Pricing {
            background-color: blue;
            width: 100%;
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            column-gap: 20px;
            margin: 40px auto 40px auto;
        }

    }

    @media (max-width: 800px) {
        header {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        ul {
            display: flex;
            flex-direction: column;
            list-style: none;
            align-items: center;
        }

        #header-img {
            width: 100%;
            height: 100%;
            max-width: 300px;
            margin: auto;
        }

        #nav-bar {
            margin: auto;
        }

        .href-text {
            text-decoration: none;
            color: black;
            margin: auto 40px auto auto;
        }
    }
</style>

<header id="header">
    <img id="header-img" src="https://cdn.freecodecamp.org/testable-projects-fcc/images/product-landing-page-logo.png">
    <nav id="nav-bar" class="nav-link">
        <ul>
            <li><a href="#features" class="nav-link">Features</a></li>
            <li><a href="#HowItWorks" class="nav-link">How It Works</a></li>
            <li><a href="#Pricing" class="nav-link">Pricing</a></li>
        </ul>
    </nav>
</header>

<main>
<section id="login">
    <h2>Handcrafted, home-made masterpieces</h2>
    <form id="form" action="https://www.freecodecamp.com/email-submit">
        <input id="email" type="email" name="email" placeholder="Enter your email address" class="form-margin" required>
        <input id="submit" type="submit" value="GET STARTED" class="btn">
    </form>
</section>

<section id="features">
    <div class="features-item">
        <div class="features-icon">
            <img src="./img/icon.png" class="icon">
        </div>
        <div class="features-desc">
            <h2>Premium Materials</h2>
            <p>Our trombones use the shiniest brass which is sourced locally. This will increase the longevity of your purchase.</p>
        </div>
    </div>
    <div class="features-item">
        <div class="features-icon">
            <img src="./img/icon.png" class="icon">
        </div>
        <div class="features-desc">
            <h2>Premium Materials</h2>
            <p>Our trombones use the shiniest brass which is sourced locally. This will increase the longevity of your purchase.</p>
        </div>
    </div>
    <div class="features-item">
        <div class="features-icon">
            <img src="./img/icon.png" class="icon">
        </div>
        <div class="features-desc">
            <h2>Premium Materials</h2>
            <p>Our trombones use the shiniest brass which is sourced locally. This will increase the longevity of your purchase.</p>
        </div>
    </div>
</section>

<section id="HowItWorks">
    <iframe id="video" src="https://www.bilibili.com/video/BV1Y54y1r7Cg?from=search&seid=3208808148645764628" frameborder="0"></iframe>
</section>

<section id="Pricing">
    <div class="priceItem">

    </div>

    <div class="priceItem">

    </div>

    <div class="priceItem">

    </div>
</section>

</main>

<footer>
    <p>Copyright 2016, Original Trombones</p>
    <p>Copyright 2016, Original Trombones</p>
</footer>