Tea Cozy Stuck

Projects Skill Path Projects
1

I dont know how make the text on hero image centerd and how to get the box with tea sorted to the flex box

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="./Resources/css/style.css">
    <title>Tea Cozy</title>
</head>

<body>
<!--Hlavicka-->
<header class="head">
    <img src="https://content.codecademy.com/courses/freelance-1/unit-4/img-tea-cozy-logo.png"> 
    </div>
    <nav class="menu">
        <a href="mission">Mission</a> 
        <a href="Featured_Tea">Featured Tea</a> 
        <a href="Locations">Locations</a> 
        </nav>
</header>

<!--Obsah-->

<div id="mission" class="flex-container">
    <div class="content">
    <h1>Our Mission</h1>
    <h2>Handpicked, Artisanally Curated, Free Range, Sustainable, Small Batch, Fair Trade, Organic Tea</h2>
    </div>
</div>

<!--Store-->

<div id="store">
    <h2>Tea of the month</h2> 
    <h3>What's stepping in the Tea Cozy</h3>
    <div class="items">
        <div class="item">
        <img src="https://content.codecademy.com/courses/freelance-1/unit-4/img-berryblitz.jpg" alt="">
        <span>Fall Berry Blitz Tea</span>
        </div>
        <div class="item">
        <img src="https://content.codecademy.com/courses/freelance-1/unit-4/img-spiced-rum.jpg" alt="">
        <span>Spiced Rum Tea</span>
        </div>
        <div class="item">
        <img src="https://content.codecademy.com/courses/freelance-1/unit-4/img-donut.jpg" alt="">
        <span>Reasonal Donut</span>
        </div>
        <div class="item">
        <img src="https://content.codecademy.com/courses/freelance-1/unit-4/img-myrtle-ave.jpg" alt="">
        <span>Myrthle ave</span>
        </div>
        <div class="item">
        <img src="https://content.codecademy.com/courses/freelance-1/unit-4/img-bedford-bizarre.jpg" alt="">
        <span>Bedford Bizzare Tea</span>
        </div>
    </div>
</div>

<!--Location-->

<div id="locations">
    <h2>Locations</h2>
    <div class="locations">
        <div class="location">
            <h3>Downtown</h3>
            <p>384 west st.</p>
            <p>Suite 108</p>
            <p>Portland, Maine</p>
        </div>
        <div class="location">
            <h3>Downtown</h3>
            <p>384 west st.</p>
            <p>Suite 108</p>
            <p>Portland, Maine</p>
        </div>
        <div class="location">
            <h3>Downtown</h3>
            <p>384 west st.</p>
            <p>Suite 108</p>
            <p>Portland, Maine</p>
        </div>
    </div>
</div>
    
<!--Paticka-->
<footer>

</footer>
</body>
</html>

body {
    margin: 0;
    font-family: Helvetica, sans-serif;
    font-size: 22px;
    color: seashell;
    background-color: black;
    opacity: 0.9;
    text-align: center;
}

a {
    color: seashell;
}

h1,
h2,
h3,
h4 {
    margin: 0;
    padding: 10px;
}

.head {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

header {
    width: 100%;
    z-index: 1;
    height: 70px;
    background-color: black;
    border-bottom: 1px solid seashell;
    align-items: center;
}

header img {
    height: 50px;
    padding: 10px;
}

nav {
    text-align: right;
    flex-grow: 1;
}

nav a {
    margin: 20px;
}

#mission {
    background-image: url("https://content.codecademy.com/courses/freelance-1/unit-4/img-mission-background.jpg");
    max-height: 700px;
    padding-top: 700px;
}


#mission .content {
    margin: auto;
    background-color: black;
    width: 100%;
    
}

#store {
    height: 700px;
    width: 1000px;
    margin: auto;
    padding-top: 70px;
    
}


.item {
    padding: 5px;
      
}

.item img {
    height: 200px;
    margin: 10px;
    
}

.item span {
    padding: 5px;
    font-weight: bold;
    text-align: center;
}