body, html {
    margin: 0px;
    padding: 0px;
}
header {
    width: 100%;
    background-color: blueviolet;
    color: aliceblue;
    text-align: center;
    padding-top: 30px;
    padding-bottom: 30px;
}
main {
    display: flex;
    gap: 15px;
    padding: 15px;
}




.container1 {
    width: 30%;
    background-color: cyan;
    padding: 15px;
}
.container2 {
    width: 40%;
    background-color: cyan;
    padding: 15px;
}
.container3 {
    display: flex;
    flex-wrap: wrap;
    gap:10px;
    justify-content: space-between;
}




.box-4 , .box-1 {
    background-color: #cccccc;
    text-align: center;
    box-shadow: inset 2px 0px 12px rgba(0,0,0,0.5);
    border: 1px solid #787878;
}
.box-4 {
    width: 22%;
}
.box-1 {
    width: 100%;
}