body {
    font-family: Arial, Helvetica, sans-serif;
    background-image: url('images/image_accueil.jpg');
    background-size: cover;
    background-attachment: fixed;
    background-position: center;
    background-repeat: no-repeat;
    margin: 0;
}

header {
    background-color: orange;
    border-bottom: 3px solid black;
    width: 100%;
}

nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 15px 30px;
}

h1 {
    margin: 0;
    font-size: 26px;
}

ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 20px;
    align-items: center;
}

li {
    margin: 0;
}

a {
    text-decoration: none;
    color: black;
    font-weight: bold;
    padding: 6px 10px;
    border-radius: 5px;
}

a:hover {
    background-color: black;
    color: orange;
    transition: 0.3s;
}

section {
    background-color: rgba(255, 255, 255, 0.9);
    margin: 30px auto;
    padding: 20px 30px;
    width: 80%;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.index h2, .page4 h2, .page5 h2 {
    color: orange;
    border-bottom: 2px solid orange;
    padding-bottom: 5px;
}

p {
    line-height: 1.6;
    font-size: 16px;
}

.page4 p {
    margin-left: 50px;
    margin-right: 50px;
    line-height: 1.6;
    font-size: 16px;
}

table {
    border-collapse: collapse;
    margin-left: 50px;
    margin-right: 50px;
    width: 45%;
    background-color: #FF9D00;
    background: linear-gradient(147deg,rgba(255, 157, 0, 1) 0%, rgba(242, 169, 141, 1) 28%, rgba(255, 255, 255, 1) 100%);
}

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

caption {
    margin-top: 50px;
    margin-bottom: 50px;
    text-align: left;
    font-size: 28px;
}

.titre_tableau {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.img_vinci, .img_eiffage, .img_cham {
    margin-right: 0px;
    padding-right: 0px;
}

footer {
    position: relative;
    text-align: center;
    margin-bottom: 0px;
    padding-bottom: 0px;
    width: 100%;
    background-color: orange;
    border-top: 3px solid black;
    margin-top:10px;
}

.page6 footer {
    margin-top: auto;
}

.titre_page5, .titre_page4, .titre_index {
    color: black;
    margin-left: 50px;
    margin-top: 25px;
    text-align: left;
    font-size: 28px;
}

.page5li {
    background-color: rgba(255, 255, 255, 0.9);
    margin: 30px auto;
    padding: 20px 30px;
    width: 80%;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.page6 {
    display: flex;
    flex-direction: column;
    font-family: 'Arial', sans-serif;
    background-color: #f0f2f5;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.formulaire {
    margin-top: 20px;
    margin-left: auto;
    margin-right: auto;
    margin-bottom: 20px;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    width: 100%;
    max-width: 500px;
    background: RGBA(255, 157, 0, 1);
    background: linear-gradient(90deg, rgba(255, 157, 0, 1) 0%, rgba(242, 169, 141, 1) 100%);
}

h2 {
    text-align: center;
    color: #000000;
    margin-top: 0;
}

.form {
    margin-bottom: 20px;
    width: 100%;
}

label, .q_radio{
    display: block;
    margin-bottom: 8px;
    color: #000000;
    font-weight: 600;
}

.choix_radio {
    display: flex;
    flex-direction: column; /* Vertical */
    align-items: flex-start; /* Tout caler à gauche */
    gap: 10px;
}

.choix_radio label {
    display: flex;
    flex-direction: row-reverse; /* C'est ça qui met le rond à droite ! */
    align-items: center; /* Centre la hauteur */
    justify-content: flex-end; /* Colle le tout à gauche (car l'axe est inversé) */
    cursor: pointer;
    font-size: 16px;
}

input, textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 15px;
}

textarea {
    height: 120px;
    resize: vertical;
}

.bouton_formulaire {
    width: 100%;
    padding: 14px;
    background-color: #27ae60;
    color: black;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
}

.bouton_formulaire:hover {
    background-color: #219150;
}

.bas {
    margin-bottom: 0px;
}

.contenu {
    display: flex;
}

.chantier_vinci, .chantier_eiffage, .chantier_cham {
    width: 700px;
    height: 847px;
    margin-right: 50px;
    margin-top: auto;
    object-fit: cover;
}

.choix {
    position: relative;
    display: inline-block;
}

.bouton_choix {
    background-color: transparent;
    color: black;
    font-weight: bold;
    font-family: inherit;
    font-size: 16px;
    border: none;
    padding: 6px 10px;
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}

.bouton_choix:hover, .choix:hover .bouton_choix {
    background-color: black;
    color: orange;
}

.contenu_choix {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    min-width: 180px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    z-index: 10;
    border-radius: 5px;
}

.choix:hover .contenu_choix {
    display: block;
}

.contenu_choix a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
    font-weight: normal;
}

.contenu_choix a:hover {
    background-color: #ddd;
    color: black;
}

h3 {
    margin-left: 150px;
}

.logo_uvsq {
    width: 95px;
}