*{
    margin: 0;
    padding: 0;
    font-family: Arial, Helvetica, sans-serif;
}
.title{
    height: 50px;
    background-color: black;
    color: white;
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    line-height: 50px;
}
.promo{
    height: 300px;
    background-size: 100% 100%;
    background-image: url('../images/iphone.jpg');
    display: flex;
    justify-content: center;
    align-items: center;
    color: yellow;
    font-weight: bold;
    font-size: 30px;
}
.description {
    width: 100%;
    display: flex;
    margin: 15px 0; 
    gap: 30px;
    justify-content: center;
    align-items: stretch; 
}
.feature{
    border: 1px solid gray;
    border-radius: 5px;
    max-width: 350px;
    padding: 20px;
}
.action{
    color: white;
    width: 100%;
    background-color: green;
    padding: 40px 0;
    text-align: center;
}
.action button{
    cursor: pointer;
    font-size: 14px;
    border-radius: 4px;
    height: 38px;
    width: 80px;
    margin-top: 15px;
}