*{
    margin:0;
    padding:0;
    box-sizing:border-box;
}

body{
    font-family: Arial, Helvetica, sans-serif;
    background:#f5f5f5;
    color:#333;
}

header{
    background:#141414;
    color:white;
    text-align:center;
    padding:20px;
}

header h1{
    font-size:36px;
    text-shadow:2px 2px 5px black;
}

.promo{
    height:350px;
    background:
        linear-gradient(rgba(0,0,0,0.5),rgba(0,0,0,0.5)),
        url("../images/Iphone16Promax.jpg");
    background-size:cover;
    background-position:center;

    display:flex;
    justify-content:center;
    align-items:center;
    gap:20px;
    flex-wrap:wrap;

    padding:20px;
}

.promo div{
    background:rgba(255,255,255,0.15);
    backdrop-filter: blur(5px);
    color:yellow;
    font-size:24px;
    font-weight:bold;
    padding:15px 20px;
    border-radius:10px;
    text-align:center;
    text-shadow:2px 2px 4px black;
}

.description{
    display:flex;
    justify-content:center;
    flex-wrap:wrap;
    gap:20px;
    padding:40px 20px;
}

.feature{
    background:white;
    width:320px;
    padding:25px;
    border-radius:12px;
    box-shadow:0 4px 10px rgba(0,0,0,.15);
    transition:.3s;
}

.feature:hover{
    transform:translateY(-8px);
    box-shadow:0 8px 20px rgba(0,0,0,.25);
}

.feature h2{
    color:#0071e3;
    margin-bottom:15px;
}

.feature p{
    line-height:1.6;
}

.action{
    text-align:center;
    padding:40px 20px;
}

.action button{
    margin:10px;
    padding:15px 28px;
    border:none;
    border-radius:8px;
    background:#0071e3;
    color:white;
    font-size:16px;
    font-weight:bold;
    cursor:pointer;
    transition:0.3s;
}

.action button:hover{
    background:#005bb5;
    transform:scale(1.05);
}
@media(max-width:768px){

    header h1{
        font-size:28px;
    }

    .promo{
        height:auto;
        padding:50px 20px;
    }

    .promo div{
        width:100%;
        font-size:20px;
    }

    .feature{
        width:100%;
    }

    .action button{
        width:90%;
    }
}