/* remove all default margins and paddings */
* {
    padding: 0;
    margin: 0;
}

header {
    height: 150px;
    background-color: rgb(127, 255, 148);
}

header h1 {
    text-align: center;
    padding-top: 50px;
    font-size: 50px;
    /* text-shadow: 1px 1px 15px black; */
}

nav {
    height: 80px;
    background-color: gray;
}

nav ul {
    display: flex;
    align-items: center;
    height: 100%;
    justify-content: space-between;
    padding: 0px 40px;
}

nav ul li {
    list-style-type: none;
}

nav ul li a {
    text-decoration: none;
    text-transform: uppercase;
    color: aquamarine;
    font-size: 30px;
    transition: 0.5s;
}

nav ul li:hover a {
    color: white;
    text-shadow: 1px 1px 15px aquamarine;
}

main {
    background-color: beige;
    min-height: calc(100vh - 150px - 80px - 50px);
    padding: 0 40px 50px 40px;
}

main p {
    font-size: 24px;
}

footer {
    height: 50px;
    background-color: gray;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
}

footer p {
    text-align: center;
    padding-top: 15px;
    color: white;
}

table {
    border-collapse: collapse;
}

th,
td {
    border: 1px solid #000;
}

th,
td {
    padding: 10px;
}

#total {
    border-bottom: none;
    border-left: none;
}

.middle_cell {
    background-color: aqua;
}