.main-nav {
    display: flex;
    background: #bee817;
    color: white;
    border-radius: 3px;
    padding: 1em;
    font-family: sans-serif;
}
.main-nav > ul {
    list-style-type: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex: 3;
}
.main-nav li {
    margin-right: 1em;
}
.main-nav > form {
    display: flex;
    justify-content: flex-end;
    flex: 1;
}
.main-nav input {
    flex: 1;
}
.main-nav button {
    background: white;
    border: 0;
    border-radius: 1em;
    color: orangered;
    padding: 0 1em;
    margin-left: 0.3em;
}
.button {
    background-color: #bee817;
    border: none;
    color: white;
    padding: 15px 32px;
    text-align: center;
    text-decoration: none;
    display: inline-block;
    font-size: 15px;
    margin: 4px 2px;
    cursor: pointer;
    border-radius: 12px;
}

@media screen and (max-width: 575px) {
    .main-nav {
        flex-direction: column;
    }
    .main-nav ul {
        flex-direction: row; /* Change this to 'column' to stack the links */
        margin-bottom: 1em;
    }
}
.item1 {
    grid-area: header;
}
.item2 {
    grid-area: main;
}
.item3 {
    grid-area: footer;
}

.grid-container {
    display: grid;
    grid-template-areas:
        "header header header header header header"
        "main main main main main main"
        "footer footer footer footer footer footer";
    gap: 1px;
    background-color: #bee817;
    padding: 10px;
}

.grid-container > div {
    background-color: rgba(255, 255, 255, 0.8);
    text-align: center;
    padding: 20px 0;
    font-size: 20px;
}

table {
    width: 100%;
    border: 1px solid black;
    border-collapse: collapse;
}
th,
td {
    border: 1px solid black;
    border-collapse: collapse;
    text-align: center;
}