/* =========================================================
   STYLE GLOBAL — Compatible tous navigateurs
   ========================================================= */

/* --- Variables CSS Centralisées --- */
:root {
  /* Couleurs principales */
  --primary: #0066ff;
  --primary-dark: #0052cc;
  --secondary: #00ffaa;
  
  /* Niveaux de gris */
  --dark: #0a0a0a;
  --dark-gray: #1a1a1a;
  --gray: #333;
  --light-gray: #666;
  --white: #ffffff;
  --muted: #cfcfcf;
  
  /* Couleurs de fond et de panneaux */
  --bg: #0c0c0c;
  --panel: #121212;
  
  /* Couleurs de texte et d'accentuation */
  --text: #f5f5f5;
  --bleu: #0066ff; /* bleue */
  --turquoise: #ffffff; /* turquoise */
  --accent: #4a90e2;
  
  /* Ombres, bordures et effets */
  --shadow: rgba(255, 255, 255, 0.16);
  --radius: 14px;
  --radius-lg: 22px;
  --blur: 10px;
  --gradient: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

/* --- Réinitialisation et Styles de Base --- */
html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}

/* --- Styles de typographie --- */
h1, h2, h3, h4, .logo {
  font-family: 'Cinzel', serif;
}

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

.text-justify {
    text-align: justify;
}

/* --- Style pour l'accessibilité au focus --- */
:focus-visible {
  outline: 3px dashed var(--accent);
  outline-offset: 4px;
}


/* =========================================================
   STYLE DES COMPOSANTS COMMUNS
   ========================================================= */

/* --- Panneaux de contenu avec effet de verre --- */
.content-panel {
  background: linear-gradient(145deg, rgba(26, 26, 26, 0.38), rgba(26, 26, 26, 0.3));
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-lg);
  padding: .5rem 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  -webkit-backdrop-filter: blur(5px);
  backdrop-filter: blur(5px);
  transition: transform 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease;
  position: relative;
}
.content-panel::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 10px;
  background: var(--gradient);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.4s ease-in-out;
}
.content-panel:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 102, 255, 0.3);
  box-shadow: 0 20px 60px rgba(0, 102, 255, 0.2);
}
.content-panel:hover::before {
  transform: scaleX(1);
}

/* =========================================================
   STYLE DES COMPOSANTS COMMUNS
   ========================================================= */

/* --- Panneaux de contenu avec effet de verre --- */
/* ... (votre code existant pour .content-panel reste le même) ... */


/* --- Boutons (Style unifié) --- */
/* Style de base partagé par tous les boutons */
.btn-unified, .cta-button, .action-btn, .filter-btn, .newsletter-form button, .reader-btn {
  display: inline-block;
  padding: 0.55rem 1.55rem;
  border: 1px solid var(--white);
  border-radius: 50px;
  font-family: 'Cinzel', serif;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.3s ease;
  background: transparent;
  color: var(--turquoise);
  text-align: center; /* Centre le texte */
  box-sizing: border-box; /* Assure que le padding n'affecte pas la largeur totale */
}

/* Effet de survol partagé par tous les boutons */
.btn-unified:hover, .cta-button:hover, .action-btn:hover, .filter-btn:hover, .newsletter-form button:hover, .reader-btn:hover {
  background: var(--turquoise);
  border-color: var(--turquoise);
  color: #111;
  box-shadow: 0 0 20px rgba(0, 255, 170, 0.4);
  transform: translateY(-2px);
}

/* Largeur uniforme pour les boutons principaux */
.btn-unified, .cta-button, .action-btn, .filter-btn {
    min-width: 150px;
}

/* Style des Filtres - État Actif (conservé) */
.filter-btn.active {
  background: var(--secondary);
  color: var(--dark);
  border-color: var(--bleu);
  box-shadow: 0 0 10px rgba(0, 102, 255, 0.3);
}

.filter-btn.active:hover {
  background: var(--dark);
  border-color: var(--primary-dark);
  color: var(--white);
}

/* Ajustements spécifiques pour certains boutons */
.filter-btn {
  padding: 0.6rem 1.2rem;
}
.newsletter-form button {
  padding: 0.8rem 1.5rem;
  /* Ce bouton n'a pas de largeur fixe pour s'adapter au formulaire */
}
.reader-btn {
    padding: 0.45rem 1rem;
    font-family: 'Lato', sans-serif;
    font-weight: 700;
    border-radius: 8px;
    /* Ce bouton est plus petit pour s'intégrer dans l'en-tête du lecteur */
}

/* --- Flèches de défilement --- */
.scroll-arrow-container {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 2rem;
  z-index: 10;
}
.scroll-down-arrow {
  position: relative;
  width: 28px;
  height: 28px;
  border: 2px solid var(--bleu);
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
  animation: bounceArrow 2.5s infinite ease-in-out;
}
.scroll-down-arrow::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 10px; height: 10px;
  border-bottom: 2px solid var(--bleu);
  border-right: 2px solid var(--bleu);
  transform: translate(-50%, -65%) rotate(45deg);
  transition: border-color 0.3s ease;
}
.scroll-down-arrow:hover {
  background-color: rgba(0, 102, 255, 0.1);
  border-color: var(--turquoise);
  animation-play-state: paused;
}
.scroll-down-arrow:hover::after {
  border-color: var(--turquoise);
}
.scroll-up-arrow::after {
  transform: translate(-50%, -35%) rotate(-135deg);
}


/* =========================================================
   STRUCTURE & MISE EN PAGE
   ========================================================= */

/* --- En-tête (Header) --- */
header {
  position: fixed;
  inset: 0 0 auto 0;
  width: 100%;
  background: rgba(10, 10, 10, 0.3);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  z-index: 1000;
  border-bottom: 1px solid transparent;
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
header.scrolled {
  background: rgba(12, 12, 12, 0.5);
  box-shadow: 0 4px 20px rgba(0,0,0,0.2);
  border-bottom-color: rgba(255, 255, 255, 0.1);
}
nav {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: padding 0.3s ease, max-width 0.4s ease-in-out;
}
header.scrolled nav {
  max-width: 900px;
  padding-top: 0.5rem;
  padding-bottom: 0.5rem;
}

/* --- Sections pleine page --- */
main { display: block; }
.hero, .section {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  box-sizing: border-box;
  position: relative;
  padding: 4.5rem 1.25rem;
  width: 100%;
}

/* --- Pied de page (Footer) --- */
footer {
  padding: 0rem 0rem;
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
}
.copyright {
  opacity: 0.5;
}


/* =========================================================
   STYLES SPÉCIFIQUES AUX SECTIONS
   ========================================================= */

/* --- Section 1: Accueil (Hero) --- */
.hero-content {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
}
.hero-content h1 {
  font-size: clamp(2.5rem, 3vw, 4.5rem);
  background: linear-gradient(135deg, var(--white) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content h2 {
  font-size: 1.5rem;
  color: var(--muted);
}
.hero-buttons-container {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}
.slideshow-container {
  position: relative;
  width: min(320px, 80vw);
  height: 420px;
  margin: 0 auto;
}
.slideshow-cover {
  position: absolute;
  inset: 0;
  background-color: #222;
  background-size: cover;
  background-position: center;
  border-radius: 16px;
  opacity: 0;
  transition: opacity 1s ease-in-out, transform 0.4s ease;
  z-index: 1;
  box-shadow: 0 18px 36px rgba(0,0,0,0.3);
}
.slideshow-cover.active {
  opacity: 1;
  z-index: 2;
}
/* Images pour le slideshow */
.slideshow-cover[data-book="eleandra"] { background-image: url('../assets/images/eleandra.webp'); }
.slideshow-cover[data-book="planete9"] { background-image: url('../assets/images/planete9.webp'); }
.slideshow-cover[data-book="survivant"] { background-image: url('../assets/images/survivant.webp'); }
.slideshow-cover[data-book="laly"] { background-image: url('../assets/images/laly.webp'); }


/* --- Section 2: À Propos --- */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  max-width: 1000px;
  align-items: center;
}
#author-photo {
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background-image: url('../assets/images/author.webp');
  background-position: center;
  background-size: cover;
  box-shadow: inset 0 0 0 6px rgba(255, 255, 255, 0.06), -10px -10px 30px rgba(0,0,0,0.3);
  margin: 0 auto;
  transition: transform 0.2s ease; /* Ajout d'une transition pour l'effet JS */
}

/* --- Section 3: Livres --- */
#livres .content-panel { padding-top: 0rem; } /* Espace pour la barre de titre */

.book-section-header {
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: .5rem;
  max-width: 1000px;
  width: 100%;
}
.book-filters {
  display: flex;
  gap: 1rem;
}
.book-category {
  transition: opacity 0.4s ease, transform 0.4s ease;
  width: 100%;
  max-width: 1200px;
}
.book-category.hidden-category {
  display: none;
}
.books-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: .5rem;
  align-items: stretch; /* Assure que les cartes ont la même hauteur */
}
.book-showcase {
  display: flex;
  flex-direction: column;
  text-align: center;
  z-index: 1;
}
.book-showcase:hover {
    z-index: 2; /* Pour que les effets de survol passent au-dessus des autres cartes */
}
.book-cover-container {
  position: relative;
  width: 200px;
  height: 280px;
  margin: 0 auto 0rem;
  z-index: 10;
}
.book-cover, .book-cover-placeholder {
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              filter 0.3s ease, opacity 0.3s ease;
  position: absolute;
  top: 0; left: 0;
}
.book-cover {
  z-index: 10;
  background-color: #222;
  box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.1);
  cursor: pointer;
}
.hover-zone {
  position: absolute;
  inset: 0;
}
/* Effets de survol 3D */
.book-cover-container:not(:has(.left:hover)):not(:has(.right:hover)) .book-cover:has(.hover-zone:hover) {
    transform: scale(1.3);
}
.book-cover-placeholder {
  z-index: 5;
  filter: grayscale(1) blur(2px);
  opacity: 0.5;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
}
.book-cover-placeholder.left { transform: translateX(-150px) scale(0.7); }
.book-cover-placeholder.right { transform: translateX(150px) scale(0.7); }
.book-cover-container:has(.left:hover) .book-cover { transform: translateX(60px) scale(0.7); }
.book-cover-container:has(.left:hover) .book-cover-placeholder.left {
    transform: translateX(-110px) scale(1.1);
    filter: grayscale(0.2) blur(0);
    opacity: 1;
    z-index: 20;
    box-shadow: 0 15px 35px rgba(0,0,0,.6);
}
.book-cover-container:has(.right:hover) .book-cover { transform: translateX(-60px) scale(0.7); }
.book-cover-container:has(.right:hover) .book-cover-placeholder.right {
    transform: translateX(110px) scale(1.1);
    filter: grayscale(0.2) blur(0);
    opacity: 1;
    z-index: 20;
    box-shadow: 0 15px 35px rgba(0,0,0,.6);
}
.tome-text {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  text-shadow: 0 0 8px rgba(0,0,0,0.8);
}
.book-cover-placeholder::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 75%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--white);
  color: #111;
  padding: 0.4rem 0.8rem;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, transform 0.3s ease;
}
.book-cover-placeholder:hover::after {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(-5px);
}
/* Images pour les couvertures */
#eleandra-tome2 { background-image: url('../assets/images/eleandraII.webp'); }
#eleandra-tome3 { background-image: url('../assets/images/eleandraIII.webp'); }
#planete9-tome2 { background-image: url('../assets/images/planete9II.webp'); }
#planete9-tome3 { background-image: url('../assets/images/planete9III.webp'); }
.book-cover[data-book="eleandra"] { background-image: url('../assets/images/eleandra.webp'); }
.book-cover[data-book="planete9"] { background-image: url('../assets/images/planete9.webp'); }
.book-cover[data-book="survivant"] { background-image: url('../assets/images/survivant.webp'); }
.book-cover[data-book="laly"] { background-image: url('../assets/images/laly.webp'); }
/* Infos du livre */
.book-info {
  display: flex;
  flex-direction: column;
  flex-grow: 1; /* Permet à cette div de prendre toute la hauteur disponible */
}
.book-info h3 { margin: 0 0 0.25rem 0; font-size: 1.4rem; }
.book-status {
  color: var(--secondary);
  font-weight: 600;
  text-transform: uppercase;
  font-size: 0.8rem;
  letter-spacing: 1px;
  margin-bottom: 1rem;
}
.book-summary {
  font-size: 1rem;
  color: var(--muted);
  text-align: justify;
}
.book-actions {
  margin-top: 0rem; /* Pousse le bouton en bas de la carte */
  padding-top: 0rem;
}

/* --- Section 4: Contact --- */
.contact-form {
  max-width: 700px;
  margin: 0 auto;
  padding: .5rem;
  width: 100%;
}
.contact-form h2 { text-align: center; margin-bottom: 2rem; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; }
.form-group { position: relative; margin-bottom: 45px; }
.form-group input, .form-group textarea {
  background: none;
  color: var(--text);
  font-size: 1rem;
  padding: 10px 10px 10px 10px;
  display: block;
  width: 100%;
  border: none;
  border-radius: 0;
  border-bottom: 1px solid var(--light-gray);
  resize: vertical;
}
.form-group input:focus, .form-group textarea:focus { outline: none; }
.form-group label {
  color: var(--muted);
  font-size: 1rem;
  position: absolute;
  pointer-events: none;
  left: 5px; top: 10px;
  transition: 0.2s ease all;
}
/* Animation du label flottant */
.form-group input:focus ~ label, .form-group input:valid ~ label,
.form-group textarea:focus ~ label, .form-group textarea:valid ~ label {
  top: -20px;
  font-size: 0.85rem;
  color: var(--turquoise);
}
.bar { position: relative; display: block; width: 100%; }
.bar:before, .bar:after {
  content: '';
  height: 2px;
  width: 0;
  bottom: 0;
  position: absolute;
  background: var(--primary);
  transition: 0.2s ease all;
}
.bar:before { left: 50%; }
.bar:after { right: 50%; }
/* Animation de la barre sous le champ */
.form-group input:focus ~ .bar:before, .form-group input:focus ~ .bar:after,
.form-group textarea:focus ~ .bar:before, .form-group textarea:focus ~ .bar:after {
  width: 50%;
}
.form-button-container { text-align: center; margin-top: 1.5rem; }
/* Newsletter et réseaux sociaux */
.contact-follow-up {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  text-align: center;
  max-width: 600px;
  width: 100%;
}
.newsletter-form p { margin: 0 0 1rem 0; color: var(--muted); }
.newsletter-form form { display: flex; max-width: 500px; margin: 0 auto; width: 100%; }
.newsletter-form input {
  width: 100%;
  padding: 0.8rem 1rem;
  border: 1px solid var(--gray);
  background: rgba(12,12,12,0.8);
  color: #e8e8e8;
  border-radius: 50px 0 0 50px;
  outline: 0;
  transition: border-color 0.3s ease;
}
.newsletter-form input:focus { border-color: var(--primary); }
.social-links h3 { margin-bottom: 1rem; }
.social-icons { display: flex; justify-content: center; gap: .5rem; }
.social-icons a { color: #e8e8e8; transition: transform 0.3s ease, color 0.3s ease; }
.social-icons a:hover { transform: scale(1.2) translateY(-3px); }
.social-icons a[aria-label="Suivez-moi sur LinkedIn"]:hover { color: #0077B5; }
.social-icons a[aria-label="Suivez-moi sur X (Twitter)"]:hover { color: #FFFFFF; }
.social-icons a[aria-label="Suivez-moi sur Instagram"]:hover { color: #E4405F; }
.social-icons a[aria-label="Suivez-moi sur Facebook"]:hover { color: #1877F2; }
.social-icons svg { width: 28px; height: 28px; }


/* =========================================================
   NAVIGATION MOBILE & ÉLÉMENTS SPÉCIAUX
   ========================================================= */

/* --- Navigation principale (liens) --- */
.logo {
  font-size: 1.8rem;
  font-weight: 700;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-decoration: none;
}
.nav-links { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; gap: 1.5rem; }
.nav-links a, .nav-disabled {
  font-family: 'Cinzel', serif;
  font-size: 0.95rem;
  letter-spacing: 0.5px;
  color: var(--white);
  text-decoration: none;
  opacity: 0.95;
  transition: color 0.2s ease, transform 0.2s ease;
  display: inline-block;
}
.nav-links a:hover { color: var(--secondary); transform: translateY(-2px); }
.nav-disabled { opacity: 0.45; cursor: not-allowed; }

/* Pop-up "Bientôt" pour la boutique */
.boutique-container { position: relative; }
.popup-boutique {
  position: absolute;
  top: 130%;
  left: 50%;
  transform: translateX(-50%) translateY(5px);
  background: var(--secondary);
  color: #111;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-family: "Lato", sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 4px 10px rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.boutique-container:hover .popup-boutique {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* --- Bouton Hamburger pour le menu mobile --- */
#hamburger-btn {
  display: none;
  width: 30px;
  height: 24px;
  border: 0;
  background: transparent;
  cursor: pointer;
  position: relative;
  z-index: 1010; /* Au-dessus de la nav */
}
#hamburger-btn span {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--secondary);
  border-radius: 5px;
  transition: all 0.25s ease;
  position: absolute;
  left: 0;
}
#hamburger-btn span:nth-child(1) { top: 0; }
#hamburger-btn span:nth-child(2) { top: 50%; transform: translateY(-50%); }
#hamburger-btn span:nth-child(3) { bottom: 0; }
#hamburger-btn.open span:nth-child(1) { transform: rotate(45deg); top: 50%; }
#hamburger-btn.open span:nth-child(2) { opacity: 0; }
#hamburger-btn.open span:nth-child(3) { transform: rotate(-45deg); top: 50%; }

/* --- Arrière-plan animé de particules --- */
.particles {
  position: fixed;
  inset: 0;
  z-index: -1;
  opacity: 0.38;
  pointer-events: none;
}
.particle {
  position: absolute;
  border-radius: 50%;
  animation: float linear infinite;
}
.particle-bleu  { background: radial-gradient(circle, var(--bleu), transparent 70%); }
.particle-blue  { background: radial-gradient(circle, var(--accent), transparent 70%); }
.particle-white { background: radial-gradient(circle, var(--white), transparent 70%); }
.particle-twinkle { animation-name: float, twinkle; }

/* --- Modal (fenêtre pop-up) pour le lecteur --- */
.reader-modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: rgba(0,0,0,0.9);
  display: none; /* Caché par défaut */
  flex-direction: column;
}
.reader-modal.active { display: flex; } /* Affiché avec la classe .active */
.reader-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  padding: 0.8rem 1rem;
  background: rgba(12,12,12,0.95);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.reader-title { font-weight: 700; }
.reader-controls { display: flex; align-items: center; gap: 0.5rem; }
.close-btn {
  width: 36px; height: 36px;
  background: transparent;
  border: 1px solid #555;
  border-radius: 50%;
  cursor: pointer;
  position: relative;
  transition: background 0.2s, transform 0.2s;
}
.close-btn:hover { background: #dc3545; border-color: #dc3545; transform: rotate(90deg); }
.close-btn::before, .close-btn::after {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  width: 16px; height: 2px;
  background: white;
  border-radius: 1px;
}
.close-btn::before { transform: translate(-50%, -50%) rotate(45deg); }
.close-btn::after { transform: translate(-50%, -50%) rotate(-45deg); }
.reader-content {
  flex-grow: 1;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  justify-content: center;
}
.reader-main {
  background: var(--dark-gray);
  border: 1px solid var(--gray);
  border-radius: 12px;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  overflow: hidden;
}
.book-page {
  background: #f0f0f0;
  color: #111;
  border-radius: 4px;
  padding: 2rem;
  height: 100%;
  overflow-y: auto;
  user-select: none;
  text-align: justify;
}
.book-page h1, .book-page h2 { text-align: left; }


/* =========================================================
   ANIMATIONS
   ========================================================= */

/* --- Keyframes pour les animations --- */
@keyframes float {
  from { transform: translateY(100vh) scale(var(--scale, 1)); }
  to { transform: translateY(-10vh) scale(var(--scale, 1)); }
}
@keyframes twinkle {
  0%, 100% { opacity: 0.3; }
  50% { opacity: 1; }
}
@keyframes bounceArrow {
  0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
  40% { transform: translateY(8px); }
  60% { transform: translateY(4px); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(40px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInFromLeftWithBlur {
  from { opacity: 0; transform: translateX(-30px); filter: blur(4px); }
  to { opacity: 1; transform: translateX(0); filter: blur(0); }
}
@keyframes fadeInFromRightWithBlur {
  from { opacity: 0; transform: translateX(30px); filter: blur(4px); }
  to { opacity: 1; transform: translateX(0); filter: blur(0); }
}

/* --- Application des animations --- */
.animate-on-load > * {
  animation: fadeInUp 1s forwards cubic-bezier(0.25, 0.46, 0.45, 0.94);
  animation-delay: 0.2s;
  opacity: 0;
}
.animate-on-scroll {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}
.animate-left {
  animation: fadeInFromLeftWithBlur 0.6s forwards cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.animate-right {
  animation: fadeInFromRightWithBlur 0.6s forwards cubic-bezier(0.25, 0.46, 0.45, 0.94);
}


/* =========================================================
   MEDIA QUERIES (RESPONSIVE DESIGN)
   ========================================================= */

/* --- Pour les tablettes (max-width: 960px) --- */
@media (max-width: 960px) {
  .content-panel { padding: 1.5rem; }
  .hero-content { grid-template-columns: 1fr; text-align: center; }
  .hero-buttons-container { justify-content: center; }
  .slideshow-container { margin: 2rem auto 0; }
  .about-grid { grid-template-columns: 1fr; text-align: center; }
  #author-photo { margin: 2rem auto 0; }
  .books-grid > .book-showcase:nth-child(2)::after { display: none; }
  .form-grid { grid-template-columns: 1fr; }
}

/* --- Pour les mobiles (max-width: 860px) --- */
@media (max-width: 860px) {
  #hamburger-btn { display: block; }
  .nav-links {
    position: fixed;
    right: 1rem;
    top: 5rem;
    display: block;
    width: min(86vw, 280px);
    padding: 1rem;
    background: rgba(12, 12, 12, 0.96);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    transform: translateX(120%);
    transition: transform 0.28s ease;
  }
  .nav-links li { margin: 0.5rem 0; }
  .nav-links.nav-open { transform: translateX(0); }
  body.nav-open-body { overflow: hidden; }
}