* {
    box-sizing: border-box;
}

body {
    width: 100%;
    height: 100%;
    background-color:lightblue;
    margin: 0;
    padding-bottom: 60px;

#nav_barre {
    display: flex;
    width: 100%;
    height: 100px;
    background-color: steelblue;
    padding-left: 10px;
    padding-right: 10px;
}

.styled {
    border: 0;
    height: 70px;
    width: 130px;
    line-height: 2.5;
    padding: 0 20px;
    box-shadow: 3px 5px 3px darkslategray;
    font-size: 1rem;
    text-align: center;
    color: white;
    text-shadow: 1px 1px 1px slategray;
    border-radius: 10px;
    background-color: royalblue;
    background-image: linear-gradient(
        to top left,
        rgb(0 0 0 / 0.2),
        rgb(0 0 0 / 0.2) 30%,
        transparent
    );
}

.styled:hover {
    background-color: midnightblue;
}

.styled:active {
    box-shadow:
       inset -2px -2px 3px rgb(255 255 255 / 0.6),
        inset 2px 2px 3px rgb(0 0 0 / 0.6);
}

#buttons {
    height: 100%;
    width: 25%;
    display: flex;
    justify-content: space-around;
    flex-direction: row-reverse;
    margin-left: auto;
    align-items: center;
}
.shadow {
    box-shadow: 0px 10px 5px gray;
}
h1{
    font-size: 40px;
}

.instyled{
    border: 0;
    height: 70px;
    width: 130px;
    line-height: 2.5;
    padding: 0 20px;
    box-shadow:
       inset -2px -2px 3px rgb(255 255 255 / 0.6),
        inset 2px 2px 3px rgb(0 0 0 / 0.6);
    font-size: 1rem;
    text-align: center;
    color: lightgrey;
    text-shadow: 1px 1px 1px darkslategrey;
    border-radius: 10px;
    background-color: darkblue;
    background-image: linear-gradient(
        to top left,
        rgb(0 0 0 / 0.2),
        rgb(0 0 0 / 0.2) 30%,
        transparent
         );
}

.table{

    width: 700px;
    height: 300px;
    border-collapse: collapse;
    font-size: 35px;
    table-layout: auto;
    border: 5px solid darkblue;
    margin-left: 600px;
    background-color: skyblue;
    box-shadow: 2px 5px 5px darkgray;
}

thead{
    background-color:rgb(8, 105, 85);
    color: lightblue;

}
th,td{
    border: 2px solid dimgray;
    padding: 10px;

}
#titre_tableau{
    font-size: 25px;
    color: seagreen;
    margin-left: 600px;
}

.form{
    display: flex;
    width: 35%;
    height: 300px;
    border: 3px solid green;
    align-items: center;
    flex-direction: column;
    margin-left: 620px;
    margin-top: 100px;
    background-color: rgb(159, 199, 159);
    box-shadow: 2px 5px 3px;

}

textarea{
    resize:initial;
    width: 527px;
    height:80px;
}