* { box-sizing: border-box; }
body {
    margin: 0;
    background: white;
    font-family: Arial, sans-serif;
}
.product {
    width: 700px;
    margin: 20px auto;
    border: 1px solid #ddd;
}
.product > header {
    height: 58px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #222;
    color: white;
    font-size: 18px;
    font-weight: bold;
}
.hero {
    height: 160px;
    background: url("../Images/iphone.svg") center/cover no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
}
.hero div {
    color: yellow;
    font-size: 30px;
    text-shadow: 1px 1px 3px #555;
}
.features {
    display: flex;
    gap: 8px;
    padding: 16px;
}
.features article {
    flex: 1;
    min-height: 90px;
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 5px;
}
.features p {
    font-size: 11px;
}
.buy {
    text-align: center;
    padding: 14px;
    background: #20aa3f;
    color: white;
}
.buy h2 { font-size: 16px; }
.buy button {
    padding: 8px 20px;
    border: 0;
    cursor: pointer;
}