/* Reset de base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  background-color: #1a1a1a;
  color: #fff;
  background-image: url("une\ image\ style\ bd\ représentant\ une\ vallée\ remplie\ de\ dinosaures.jpeg");
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: scroll; /* ← on gère le scroll manuellement */
  background-position: center center;
  transition: background-position 0.5s ease-out;
}

/* NAVIGATION */

header {
  background: linear-gradient(135deg, #3CA55C, #B5AC49, #3CA5A5);
  color: white;
  padding: 1rem 2rem;
  position: relative;
  z-index: 2;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

nav {
  background: linear-gradient(135deg, #3CA55C, #B5AC49, #3CA5A5);
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 2;
}

nav h1 {
  font-size: 2rem;
  margin: 0;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 20px;
}

nav a {
  color: white;
  text-decoration: none;
  font-size: 1.1rem; /* ← Ajuste ici si tu veux encore plus grand */
  margin-left: 1.5rem;
  transition: color 0.3s;
  font-weight: 500;
}

nav a:hover {
  color: #FFA500
}

/* SECTION PRINCIPALE AVEC IMAGE DE FOND */
.main-section {
  min-height: 100vh;
  padding: 80px 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
}

.main-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.185); /* assombrit le fond pour la lisibilité */
  z-index: 0;
}

.main-section .content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  text-align: center;
}

.main-section h2 {
  font-size: 2.5rem;
  margin-bottom: 20px;
}

.main-section p {
  font-size: 1.2rem;
}

.content {
  background-color: rgba(34, 133, 50, 0.336);
  border-radius: 15px;
  padding: 2rem;
  max-width: 800px;
  margin: 2rem auto;
  text-align: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.cta-button {
  background-color: #FFD700;
  color: #000;
  padding: 1rem 2rem;
  font-size: 1.2rem;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  margin-top: 1.5rem;
  display: inline-block;
  text-decoration: none;
  font-weight: 600;
  transition: background-color 0.3s ease;
}

.cta-button:hover {
  background-color: #e69500;
  transform: scale(1.05);
}

footer {
  background: linear-gradient(135deg, #3CA55C, #B5AC49, #3CA5A5);
  color: white;
  text-align: center;
  padding: 1rem;
  position: relative;
  z-index: 2;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}

/*PAGE DINOSAURES*/

.page-dinosaures {
    position: relative;
    background-image: url("Un\ volcan\ préhistorique\ en\ dessin\ style\ bd.jpeg");
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.page-dinosaures::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.25); /* valeur de départ */
    pointer-events: none; /* clics possibles à travers */
    transition: background 0.2s ease-out; /* transition douce */
}

.page-dinosaures::before {
    background: rgba(0, 0, 0, var(--overlay-opacity, 0.25));
}

header nav {
  background: none;      /* Supprime toute couleur de fond */
  border: none;          /* Supprime toute bordure éventuelle */
  padding: 0;            /* Supprime tout espace intérieur */
  margin: 0;             /* Supprime les marges si présentes */
  box-shadow: none;      /* Supprime toute ombre éventuelle */
}

header nav a {
  margin-left: 1.5rem; /* espace entre les liens */
  text-decoration: none;
  color: white;
  font-weight: 500;
  font-size: 1rem;
  transition: color 0.3s ease;
}

header nav a:first-child {
  margin-left: 0; /* supprime la marge à gauche du premier lien */
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
}

.dinosaurs-page {
  padding: 2rem;
  backdrop-filter: brightness(0.95);
}

.dino-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
  padding: 2rem 1rem;
  background-color: rgba(255, 248, 235, 0.651);
  border-radius: 12px;
  margin: 2rem auto;
  width: 90%;
  max-width: 800px;
  box-shadow: 0 0 15px rgba(0,0,0,0.15);
}

.dino-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  background: rgba(139, 69, 19, 0.13); /* brun léger */
  padding: 1rem;
  border-radius: 10px;
  width: 100%;
  max-width: 320px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  transition: transform 0.2s ease-in-out;
}

.dino-card:hover {
  transform: scale(1.03);
}

.dino-card img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  border: 3px solid #8B4513; /* brun préhisto */
}

.dino-card h3 {
  font-size: 1.3rem;
  margin-top: 0.8rem;
  color: #3a2e1f;
  font-family: 'Papyrus', 'Trebuchet MS', sans-serif; /* pour un effet vieilli */
}

.dino-card p {
  font-size: 1rem;
  color: #4b3b2c;
  font-family: 'Georgia', serif;
  text-align: center;
}

.btn-dino {
    background-color: #a52a2a;
    color: white;
    border: none;
    padding: 8px 12px;
    margin-top: 8px;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s ease;
    font-size: 14px;
}

.btn-dino:hover {
    background-color: #8b1a1a;
}

/*PAGE QUIZ*/

.page-quiz {
  background: url('une\ image\ style\ bd\ représentant\ une\ vallée\ remplie\ de\ dinosaures\ \(2\).jpeg') no-repeat center center fixed;
  background-size: cover;
}

.quiz-container {
  max-width: 800px;
  margin: 80px auto;
  background: rgba(0, 25, 48, 0.452);
  padding: 30px;
  border-radius: 15px;
  color: white;
  box-shadow: 0 0 15px rgba(0,0,0,0.5);
  font-size: 1.2em;
}

.quiz-container h2 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 1.5em;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.6);
}

.quiz-container label {
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.6);
}

.question {
  margin-bottom: 40px;
  text-align: center;
  background: rgba(3, 0, 41, 0.4);
  padding: 15px;
  border-radius: 10px;
  margin-bottom: 20px;
}

.question h2,
.question label {
  color: #fff;
}

.question p {
  font-size: 1.3em;
  font-weight: bold;
  margin-bottom: 15px;
}

.options {
  display: inline-block;
  text-align: left;
}

.options label {
  display: block;
  margin: 10px 0;
  cursor: pointer;
  font-size: 1.1em;
  transition: transform 0.2s ease, text-shadow 0.2s ease;
}

.options label:hover {
  transform: scale(1.05);
  text-shadow: 0 0 8px #c49b63, 0 0 15px #c49b63;
}

.btn-container {
  text-align: center;
  margin-top: 20px;
}

.btn {
  display: inline-block;
  padding: 12px 25px;
  margin: 15px 10px;
  background-color: #fffb00;
  color: rgb(0, 0, 0);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1em;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.btn:hover {
  background-color: #e69500;
  transform: scale(1.05);
}

.result {
  margin-top: 30px;
  text-align: center;
  font-size: 1.4em;
  font-weight: bold;
}

/* -------------------- RESPONSIVE -------------------- */

/* Tablettes et écrans moyens */
@media (max-width: 992px) {
  nav h1 {
    font-size: 1.5rem;
  }

  nav ul {
    gap: 10px;
  }

  nav a {
    font-size: 1rem;
    margin-left: 1rem;
  }

  .main-section h2 {
    font-size: 2rem;
  }

  .main-section p {
    font-size: 1rem;
  }

  .quiz-container {
    margin: 50px 20px;
    font-size: 1rem;
    padding: 20px;
  }

  .dino-card {
    max-width: 250px;
  }
}

/* Mobiles */
@media (max-width: 768px) {
  nav {
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul {
    flex-direction: column;
    align-items: center; /* ← centre tous les liens */
    gap: 15px; /* espace entre eux */
    padding: 0;
    margin: 0 auto; /* force le centrage */
  }

  nav li {
    width: 100%;
    text-align: center; /* ← centre chaque lien */
  }

  nav a {
    font-size: 0.95rem;
    margin-left: 0;
    display: inline-block;
    width: auto; /* pas toute la largeur */
  }

  .main-section {
    padding: 60px 15px;
  }

  .main-section h2 {
    font-size: 1.8rem;
  }

  .main-section p {
    font-size: 1rem;
  }

  .content {
    padding: 1.5rem;
    margin: 1rem;
  }

  .cta-button {
    font-size: 1rem;
    padding: 0.8rem 1.5rem;
  }

  .dino-section {
    width: 100%;
    padding: 1rem;
    margin: 1rem 0;
  }

  .dino-card {
    max-width: 100%;
  }

  .quiz-container {
    margin: 40px 15px;
    padding: 15px;
    font-size: 1rem;
  }

  .btn {
    font-size: 1rem;
    padding: 10px 18px;
  }
}

/* Petits mobiles (iPhone SE, etc.) */
@media (max-width: 480px) {
  nav h1 {
    font-size: 1.2rem;
  }

  nav ul {
    gap: 5px;
  }

  nav a {
    font-size: 0.9rem;
  }

  .main-section h2 {
    font-size: 1.5rem;
  }

  .main-section p {
    font-size: 0.9rem;
  }

  .cta-button {
    font-size: 0.9rem;
    padding: 0.6rem 1rem;
  }

  .quiz-container {
    font-size: 0.9rem;
  }

  .question p {
    font-size: 1rem;
  }

  .btn {
    font-size: 0.9rem;
    padding: 8px 15px;
  }
}