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

body {
    display: grid;
    grid-template-rows: auto 1fr auto;
    grid-template-columns: 1fr;
    height: 100vh;
}

header {
    grid-row: 1;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    align-items: center;
    text-align: center;
    background-color: royalblue;
    color: white;
    padding: 6px;
}
header.test {
    background-color: green;
}
@media (max-width: 768px) {
    header {
        display: block;
    }
}

/* Menu */
#menu-toggle {
    background: none;
    border: none;
    font-size: 2rem;
    cursor: pointer;
    display: none;
    justify-self: start;  /* Aligner à gauche */
    color: white;
}

nav {
    display: flex;
    justify-content: left;
}

nav ul {
    list-style: none;
    display: flex;
    padding: 0;
}

nav ul li {
    position: relative;
    padding: 0;
}

nav ul li a {
    text-decoration: none;
    color: white;
    padding: 6px;
    display: block;
}

/* Sous-menus */
.submenu {
    display: none;
    position: absolute;
    background: dodgerblue;
    top: 100%;
    left: 0;
    min-width: 200px;
    box-shadow: 0px 4px 6px rgba(0, 0, 0, 0.2);
}

.submenu li {
    width: 100%;
}

.submenu a {
    padding: 10px;
    color: white;
    display: block;
}

.has-submenu:hover > .submenu {
    display: block;
}

/* Gestion du deuxième niveau */
.submenu .has-submenu {
    position: relative;
}

.submenu .has-submenu .submenu {
    top: 0;
    left: 100%;
    background-color: deepskyblue;
}

/* Responsive */
@media (max-width: 768px) {
    #menu-toggle {
        display: block;
    }

    nav {
        display: none;
        position: absolute;
        top: 3rem;
        left: 0;
        width: 100%;
        background: royalblue;
        flex-direction: column;
    }

    nav ul {
        flex-direction: column;
        width: 100%;
    }

    .submenu {
        position: static;
        display: none;
        box-shadow: none;
    }

    .has-submenu.active > .submenu {
        display: block;
    }
}

/* Page */

a {
    text-decoration: none;
    color: royalblue;
}
header a {
    color: white;
}

h1 {
    padding: 6px;
}

.headerRight {
    justify-self: end;
    margin-right: 1rem;
}
@media (max-width: 768px) {
    .headerRight {
        justify-content: center;
    }
}

main {
    display: grid;
}

/* 1 Column */
main.one {
    grid-template-columns: 1fr;
}

/* 2 Columns */
main.two {
    grid-template-columns: 2fr 1fr;
}

@media (max-width: 768px) {
    main.two {
        grid-template-columns: 1fr;
    }
}

footer {
    grid-row: 3;
    background-color: lightgrey;
    display: flex;
    justify-content: space-between;
    padding: 6px 1rem 6px 6px; 
}

/* Elements */

button {
    background-color: royalblue;
    color: white;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 6px;
    margin: 6px;
    border: 1px solid white;
    border-radius: 6px;
}
button:hover,
button:focus :not(.disabled) {
    background-color: yellow;
    color: slategrey;
}
button:disabled {
    pointer-events: none;
    background-color: lightgray;
}

header button,
header input[type="datetime-local"] {
    appearance: none;
    -webkit-appearance: none;
    box-sizing: border-box;
    color: royalblue;
    background-color: white;
    height: 42px;
    border: 1px solid white;
    padding: 0 6px;
    line-height: 42px;
}

select,
input,
textarea {
    border-radius: 6px;
    margin: 6px;
    padding: 6px;
    border: 1px royalblue solid;
    font-size: 1.2rem;
}
input[readonly] {
    border: none;
    margin: 0;
    padding: 0;
}

ul {
    padding-left: 1rem;
}

table {
    border-collapse: collapse;
}

thead {
    text-align: center;
}

th {
    border: 1px solid;
    text-align: center;
    vertical-align: middle;
    padding: 6px;
}

td {
    border: 1px solid;
    padding: 3px;
    text-align: center;
    vertical-align: middle;
}

article {
    background-color: white;
    padding: 6px;
    border-radius: 6px;
}