* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
}

@view-transition {
    navigation: auto;
}

header{
    background-color: aqua;
    display: flex;
    height: 62px;
    padding: 0 30px;
}

header ul{
    display: flex;
    align-items: center;
    height: 62px;
    justify-content: end;
    gap: 80px;
}

header ul li{
    list-style: none;
    text-transform: uppercase;
}

header li a{
    text-decoration: none;
    color: black;
    font-weight: bold;
}

nav{
    /* background-color: tomato; */
    /* display: inline-block; */
    flex-grow: 1;
}

main{
    background-color: chartreuse;
    padding: 20px 20px 60px 20px; /* top, right, bottom, left*/
    /* padding: 20px 30px;  - top/bottom, left/right */
    min-height: calc(100vh - 62px - 50px);
}

.my_table{
    border-collapse: collapse;
    margin-bottom: 50px;
}

.my_table th, .my_table td{
    border: 3px solid blue;
    width: 80px;
    padding: 5px;
    text-align: center;
}

.not_current_month{
    opacity: 0.5;
}

#current_date{
    font-weight: bold;
    background-color: blue;
    color: white;
}

.my_table td:not(.not_current_month):hover{
    background-color: rgb(35, 70, 0);
    color: white;
}

#card_cont{
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: space-evenly;
}

.product_card{
    border: 5px solid red;
    border-radius: 20px;
    margin: 20px;
    padding: 15px;
    width: 300px;
    box-shadow: 1px 1px 15px gray;
}

footer{
    background-color: darkgray;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 50px;
    text-align: center;
    line-height: 50px;
}


#main_area{
    background-color: tomato;
    padding: 10px;
    display: flex;
    gap: 10px;
}
#left_area{
    background-color: wheat;
    flex-grow: 1;
    padding: 10px;
}

#left_area p{
    background-color: darkgreen;
    margin-bottom: 10px;
}
#right_area{
    background-color: darkblue;
    width: 300px;
    flex-grow: 0;
    flex-shrink: 0;
}