*{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

body{
    background-color: white;
}

.banner{
    width: 100%;
    height: 100px;
    background-color: black;
    display: flex;
    justify-content: center;
    align-items: center;
    color: white;
    font-weight: 700;
    font-size: 30px;   
}

.iphone-image{
    position: relative;
    width: 100%;
    height: 350px;
    overflow: hidden;
    padding-bottom: 20px;
}

.iphone-image img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.iphone-image::after{
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(235, 228, 228, 0.826), rgba(204, 190, 190, 0));
    pointer-events: none;
}

.iphone-image h3{
    position: absolute;
    top: 50%;
    left: 50%;
    text-align: center;
    color: rgb(195, 195, 99);
    font-size: 60px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    transform: translate(-50%, -50%);
    z-index: 2;
    width: 90%;
}

.about-information{
    display: flex;
    justify-content: center;
    gap: 30px;
    padding-bottom: 20px;
    flex-wrap: wrap;
}

.subinfor{
    max-width: 350px;
    padding: 20px;
    border: 1px solid black;
    border-radius: 4px;
}

.footer{
    width: 100%;
    background-color: #02f537;
    padding: 40px 0;
    text-align: center;
}

.footer h3{
    font-size: 30px;
    color: white;
    font-weight: bold;
    margin-bottom: 25px;
}

.footer button{
    font-size: 14px;
    border: none;
    border-radius: 3px;
    text-align: center;
    color: #333333;
    font-family: Arial, sans-serif;
    height: 38px;
    width: 110px;
    margin-bottom: 0;
    transition: background-color 0.2s;
}

.footer button:hover{
    background-color: #cfe529;
}