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

body {
    margin: 0;
    width: 100vw;
    height: 100vh;
    background-color: aqua;
}

.main_container {
    width: 100%;
    height: 100%;
    background-color: white;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 10px;
}

.element1, .element2, .element3, .element4 {
    width: 49%;
    height: 45vh;
    box-sizing: border-box;
    padding: 10px;
    margin-bottom: 10px;
}

.element1 {
    background-color: #e9e9e9;
}

.element2 {
    background-color: #e9e9e9;
}

.element3 {
    background-color: #e9e9e9;
}

.element4 {
    background-color: #e9e9e9;
}