:root {
  --primary-bg: #333;
  --secondary-bg: #444;
  --tertiary-bg: #555;
  --accent-color: yellow;
  --text-color: white;
  --border-radius: 8px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 200px;
}

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

body {
  background-color: var(--primary-bg);
  font-family: "Roboto", arial;
  color: var(--text-color);
}

img {
  max-width: 100%;
  height: auto;
}

ul:not(.bandeau ul) {
  list-style-type: disc; /* Affiche les puces */
  padding-left: 20px;
}

/* Optimisation: espacement des éléments de liste au lieu de <br /> */
li {
  margin-bottom: 10px;
}

/* Menu de haut de page */
.bandeau {
  position: fixed; /* Fixé en haut de l'écran */
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--primary-bg);
  padding: 15px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.5);
  z-index: 1000;
  border-bottom: 2px solid var(--accent-color);
}

/* Conteneur des liens */
.bandeau ul {
  list-style: none;
  display: flex;
  justify-content: space-around; /* éléments espacés de manière proportionnelle */
  width: 100%;
}

/* Style des liens */
.bandeau ul li a {
  text-decoration: none;
  color: var(--text-color);
  font-size: 18px;
  font-weight: bold;
  padding: 10px 2em;
  transition: 0.5s;
}

.bandeau ul li a:hover {
  background-color: var(--accent-color);
  border-radius: 5px;
  color: var(--primary-bg);
}

/* Style pour le lien actif de la barre de navigation */
.bandeau ul li a.active {
  background-color: var(--accent-color);
  border-radius: 5px;
  color: var(--primary-bg);
}

/* Paragraphe d'intro */
.intro {
  color: var(--text-color);
  width: 33%;
  background-color: var(--primary-bg);
  padding: 30px;
  text-align: center;
  border: 1px solid white;
  border-radius: 50px;
  position: absolute;
  left: 10%;
}

.bienvenue {
  font-size: 48px;
  margin-bottom: 25px;
}

.VT {
  font-size: 24px;
}

.photo-id {
  border: 1px solid white;
  border-radius: 100%;
  position: absolute;
  right: 10%;
  width: auto;
  height: 50%;
}

h2 {
  margin: 100px 0 50px 0;
  border-top: 2px solid var(--accent-color);
  border-bottom: 2px solid var(--accent-color);
  text-align: center;
  padding: 10px;
  color: var(--text-color);
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Style pour les sections */
section {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 0.6s ease-out,
    transform 0.6s ease-out;
}

section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* EXPERIENCES */

.experience-block {
  display: flex;
  align-items: stretch;
  margin-bottom: 20px;
  gap: 20px;
}

.experience-block img.img-exp {
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.experience-block.geomaticien img.img-exp {
  width: 40%;
  height: auto;
  object-fit: cover;
}

.experience-text {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 10px;
  background-color: var(--secondary-bg);
  border: 1px solid black;
  border-radius: 50px;
}

.img-exp {
  float: right;
  background-color: #ddd;
  border: 1px solid black;
  border-radius: 50px;
  padding: 5px;
  display: block;
  margin: 10px auto;
  max-width: 100%;
}

.boite {
  background-color: var(--tertiary-bg);
  color: var(--text-color);
  padding: 0;
  width: 75%;
  margin: 20px auto;
  border-radius: var(--border-radius);
  border: 2px solid var(--accent-color);
  box-shadow: 0 2px 5px rgba(255, 255, 0, 0.5);
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}

/* Transition pour l'ouverture/fermeture */
.section-content {
  max-height: 0; /* Contenu caché par défaut */
  overflow: hidden;
  padding-top: 10px;
  transition: max-height 0.3s ease-out; /* Animation fluide */
  background-color: var(--tertiary-bg);
  border-radius: var(--border-radius);
}

.section-content ul {
  margin-bottom: 30px;
}

.section-toggle {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  height: 50px;
  background: none;
  border: none;
  font-size: 1.5em;
  font-weight: bold;
  color: var(--text-color);
  cursor: pointer;
  transition: 0.3s ease-in-out;
}

.section-toggle:hover {
  color: var(--accent-color);
}

.boite.open .section-content {
  max-height: 500px;
}

/* Style du texte dans la boîte */
.titre_parcours {
  text-align: center;
  font-size: x-large;
  color: var(--accent-color);
  padding: 20px;
}

.boite .missions,
.boite .missions-scol {
  font-size: larger;
  color: var(--text-color);
}

.boite .missions-scol {
  text-align: center;
}

.sigle {
  cursor: help;
  text-decoration: none;
}

.site-entreprise {
  text-decoration: none;
  color: var(--accent-color);
  position: relative; /* pour positionner le soulignement */
  transition: font-weight 0.3s ease-in-out;
}

/* Effet au survol du nom de l'entreprise */
.site-entreprise::after {
  content: ""; /* Nécessaire pour générer l'élément */
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0; /* Largeur initiale du soulignement */
  height: 1px;
  background-color: var(--accent-color);
  transition: width 0.3s ease-in-out;
}

.site-entreprise:hover::after {
  width: 100%;
}

#presentation {
  position: relative;
  width: 100%;
  height: 100vh; /* toute la hauteur de l'écran */
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-color);
}

.slideshow-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: -1; /* en arrière-plan */
}

#slide-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 1s ease-in-out;
  border-bottom: 2px solid var(--accent-color);
}

#slide-text {
  position: absolute;
  bottom: 0;
  left: 0;
  background-color: var(--primary-bg);
  color: var(--text-color);
  padding: 10px 20px;
  font-size: 24px;
  font-weight: bold;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  text-align: center;
  border-top: 2px solid var(--accent-color);
  border-right: 2px solid var(--accent-color);
  border-top-right-radius: 20px;
}

.paragraphe1 {
  display: flex;
  justify-content: center;
  gap: 100px;
  height: 100vh;
}

.realisations-container {
  margin-bottom: 50px;
  margin-top: 50px;
  display: flex;
  flex-wrap: wrap; /* Permet de passer à la ligne quand nécessaire */
  justify-content: space-between; /* Espacement entre les items */
  gap: 20px;
}

.realisations-item {
  position: relative;
  width: calc(30% - 15px); /* Réduit la largeur pour laisser plus d'espace */
  height: 200px;
  overflow: hidden;
  border-radius: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--accent-color);
  margin-bottom: 15px;
}

.realisations-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  cursor: zoom-in;
}

.legende {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  color: var(--text-color);
  text-align: center;
  padding: 10px;
  opacity: 0;
  transform: translateY(100%);
  transition:
    opacity 0.3s ease-in-out,
    transform 0.3s ease-in-out;
}

.realisations-item:hover .legende {
  opacity: 1;
  transform: translateY(0);
}

.missions {
  text-align: justify;
}

/* CONTACT */
#contact {
  background-color: var(--primary-bg);
  color: var(--text-color);
  border-radius: 10px;
  width: 80%;
  margin: auto;
}

#contact p {
  text-align: center;
  font-size: 1.1em;
  margin-bottom: 20px;
}

#contactForm {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

#contactForm label {
  font-size: 1.2em;
}

#contactForm input,
#contactForm textarea {
  padding: 10px;
  font-size: 1em;
  border: 2px solid #ccc;
  border-radius: var(--border-radius);
  background-color: var(--secondary-bg);
  color: var(--text-color);
  transition: all 0.3s ease;
  width: 100%;
  max-width: 100%;
}

#contactForm textarea {
  resize: vertical; /* Empêche l'extension horizontale par l'utilisateur */
}

#contactForm input:focus,
#contactForm textarea:focus {
  border-color: var(--accent-color);
  outline: none;
  background-color: var(--primary-bg);
}

#contactForm button {
  padding: 12px 20px;
  font-size: 1.2em;
  color: black;
  font-weight: bold;
  background-color: var(--accent-color);
  border: none;
  border-radius: 50px;
  cursor: pointer;
  transition:
    background-color 0.3s ease,
    transform 0.2s;
}

#contactForm button:hover {
  transform: scale(1.05);
}

#confirmationMessage {
  display: none;
  text-align: center;
  font-size: 1.1em;
  margin-top: 20px;
}

/* FOOTER */

footer {
  width: 100%;
  background-color: var(--primary-bg);
  padding: 20px;
  color: var(--text-color);
  text-decoration: none;
  font-size: 12px;
  text-align: center;
  border-top: 2px solid var(--accent-color);
  margin-top: 5%;
}

.footer-logos {
  display: flex;
  justify-content: center;
  gap: 50px;
  margin-bottom: 10px;
}

.footer-img {
  height: 50px;
  transition: transform 0.3s ease-in-out;
  margin-bottom: 5px;
}

.footer-img:hover {
  transform: scale(1.25); /* Effet zoom au survol */
}

.site-sigma {
  text-decoration: none;
  color: var(--text-color);
  position: relative;
  transition: font-weight 0.3s ease-in-out;
}

.site-sigma::after {
  content: "";
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--accent-color);
  transition: width 0.3s ease-in-out;
}

.site-sigma:hover::after {
  width: 100%; /* soulignement au survol */
}

.site-sigma:hover {
  font-weight: bold;
}

#version {
  float: right;
}

/* Adaptation aux écrans mobiles */
@media (max-width: 768px) {
  .bandeau ul {
    flex-direction: column;
    align-items: center;
    gap: 10px;
  }

  .bandeau {
    padding: 10px;
    margin-bottom: 100px;
  }

  .bandeau ul li a {
    font-size: 16px;
    padding: 5px 10px;
  }

  .intro {
    width: 90%;
    left: 50%;
    transform: translateX(-25%);
    padding: 15px;
    position: relative;
    margin-bottom: 20px;
    margin-top: 100px;
  }

  .bienvenue {
    font-size: 28px;
  }

  .VT {
    font-size: 20px;
  }

  .photo-id {
    left: -60%;
    display: block;
    position: relative;
    width: 40%;
    height: auto;
    margin: 0 auto;
    transform: none;
  }

  .realisations-container {
    display: flex;
    flex-direction: column;
    align-items: center;
  }

  .realisations-item {
    width: 90%;
    height: auto;
  }

  .experience-block {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .experience-block.geomaticien {
    flex-direction: column-reverse;
  }

  .experience-block .img-exp {
    width: 80%;
  }

  .experience-block.geomaticien img.img-exp {
    width: 80%;
  }
}