/*
  Styles de la chronologie principale.
  Ce fichier remplace l'ancien bloc <style> de index.html pour garder le HTML structurel.
  Les sections sont commentees par role: navigation, filtres, timeline, fonds d'ere, responsive.
*/
/* Variables globales de la DA : couleurs, contrastes et identités des ères. */
  :root {
    --gold: #c9a84c;
    --gold-light: #e8c97a;
    --gold-dim: #7a5e25;
    --wakfu-teal: #2ecfb0;
    --waven-blue: #4a9eff;
    --primitif-violet: #9b7fd4;
    --dofus-amber: #d4813a;
    --dark-bg: #080810;
    --card-bg: #0d0d1a;
    --card-border: #1e1e3a;
    --text-main: #e8e0d0;
    --text-muted: #8a7f6e;
  }

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

  html { scroll-behavior: smooth; }

  body {
    background: var(--dark-bg);
    color: var(--text-main);
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 18px;
    line-height: 1.65;
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* Starfield background */
  body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
      radial-gradient(1px 1px at 10% 15%, rgba(255,255,255,0.6) 0%, transparent 100%),
      radial-gradient(1px 1px at 25% 40%, rgba(255,255,255,0.4) 0%, transparent 100%),
      radial-gradient(1px 1px at 40% 8%, rgba(255,255,255,0.5) 0%, transparent 100%),
      radial-gradient(1px 1px at 60% 55%, rgba(255,255,255,0.3) 0%, transparent 100%),
      radial-gradient(1px 1px at 75% 20%, rgba(255,255,255,0.7) 0%, transparent 100%),
      radial-gradient(1px 1px at 85% 70%, rgba(255,255,255,0.4) 0%, transparent 100%),
      radial-gradient(1px 1px at 92% 35%, rgba(255,255,255,0.5) 0%, transparent 100%),
      radial-gradient(1px 1px at 5% 80%, rgba(255,255,255,0.3) 0%, transparent 100%),
      radial-gradient(1px 1px at 50% 90%, rgba(255,255,255,0.4) 0%, transparent 100%),
      radial-gradient(1px 1px at 33% 65%, rgba(255,255,255,0.5) 0%, transparent 100%),
      radial-gradient(2px 2px at 18% 50%, rgba(201,168,76,0.4) 0%, transparent 100%),
      radial-gradient(2px 2px at 70% 10%, rgba(46,207,176,0.3) 0%, transparent 100%),
      radial-gradient(1px 1px at 55% 30%, rgba(255,255,255,0.6) 0%, transparent 100%),
      radial-gradient(1px 1px at 80% 85%, rgba(255,255,255,0.4) 0%, transparent 100%),
      radial-gradient(1px 1px at 45% 72%, rgba(255,255,255,0.3) 0%, transparent 100%);
    pointer-events: none;
    z-index: 0;
  }

  /* Nebula glow */
  body::after {
    content: '';
    position: fixed;
    top: -20%;
    left: -10%;
    width: 70%;
    height: 60%;
    background: radial-gradient(ellipse, rgba(46,207,176,0.04) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
  }

  /* Barre de navigation principale partagée avec les autres pages du site. */
  header {
    position: relative;
    z-index: 10;
    padding: 0 0 1.5rem;
    border-bottom: 1px solid rgba(201,168,76,0.15);
  }

  .site-topbar {
    position: sticky;
    top: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 1.5rem;
    padding: 0.9rem 1.5rem;
    background: rgba(7, 7, 12, 0.94);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    backdrop-filter: blur(10px);
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    color: #f6f2e7;
    text-decoration: none;
    font-family: 'Cinzel', serif;
    font-size: 1.05rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
  }

  .brand img {
    width: 28px;
    height: 28px;
    object-fit: contain;
    flex-shrink: 0;
  }

  .brand span {
    line-height: 1;
  }

  .top-nav {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-wrap: wrap;
  }

  .nav-item {
    position: relative;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.7rem 0.85rem;
    border: 0;
    background: transparent;
    color: #f3efe4;
    font-family: 'Cinzel', serif;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease;
  }

  .nav-link:visited,
  .nav-link:hover,
  .nav-link:focus-visible,
  .nav-link:active {
    text-decoration: none;
  }

  .nav-link:hover,
  .nav-item:focus-within > .nav-link {
    color: var(--gold-light);
    background: rgba(201,168,76,0.08);
  }

  .nav-caret {
    font-size: 0.8em;
    opacity: 0.8;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 0.4rem);
    left: 0;
    min-width: 220px;
    padding: 0.45rem;
    border: 1px solid rgba(201,168,76,0.16);
    background: rgba(12, 12, 18, 0.97);
    box-shadow: 0 16px 35px rgba(0,0,0,0.35);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
  }

  .nav-dropdown:hover .nav-menu,
  .nav-dropdown:focus-within .nav-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-menu-item {
    width: 100%;
    display: block;
    padding: 0.7rem 0.8rem;
    border: 0;
    background: transparent;
    color: var(--text-main);
    font-family: 'Cinzel', serif;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    text-align: left;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
  }

  .nav-menu-item:hover,
  .nav-menu-item.active {
    background: rgba(201,168,76,0.08);
    color: var(--gold-light);
  }

  /* Barre des filtres d'ère : elle pilote la timeline sans rechargement de page. */
  .era-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 1.2rem 1rem 0;
  }

  .era-btn {
    font-family: 'Cinzel', serif;
    font-size: 10px;
    letter-spacing: 0.15em;
    padding: 6px 14px;
    border: 1px solid rgba(201,168,76,0.25);
    background: transparent;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.2s;
    text-transform: uppercase;
  }

  .era-btn:hover, .era-btn.active {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(201,168,76,0.06);
  }

  .era-btn[data-filter="all"]:hover,
  .era-btn[data-filter="all"].active {
    border-color: var(--gold);
    color: var(--gold);
    background: rgba(201,168,76,0.08);
  }

  .era-btn[data-filter="primitif"]:hover,
  .era-btn[data-filter="primitif"].active {
    border-color: #9b7fd4;
    color: #9b7fd4;
    background: rgba(155,127,212,0.08);
  }

  .era-btn[data-filter="dofus"]:hover,
  .era-btn[data-filter="dofus"].active {
    border-color: var(--dofus-amber);
    color: var(--dofus-amber);
    background: rgba(212,129,58,0.08);
  }

  .era-btn[data-filter="wakfu"]:hover,
  .era-btn[data-filter="wakfu"].active {
    border-color: var(--wakfu-teal);
    color: var(--wakfu-teal);
    background: rgba(46,207,176,0.08);
  }

  .era-btn[data-filter="waven"]:hover,
  .era-btn[data-filter="waven"].active {
    border-color: var(--waven-blue);
    color: var(--waven-blue);
    background: rgba(74,158,255,0.08);
  }

  /* MAIN LAYOUT */
  main {
    position: relative;
    z-index: 5;
    max-width: 900px;
    margin: 0 auto;
    padding: 4rem 1.5rem 6rem;
  }

  .timeline::before,
  .era-bg::after {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom,
      rgba(201,168,76,0.4) 0%,
      rgba(201,168,76,0.2) 50%,
      rgba(201,168,76,0.4) 100%);
    transform: translateX(-50%);
    z-index: 1;
  }
  .era-bg { position: relative; }

  /* ERA SECTION */
  .era-section {
    margin-bottom: 0;
    transition: opacity 0.3s;
  }

  .era-section.hidden { display: none; }

  /* ERA TITLE — centered, straddling the line */
  .era-title-wrap {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 2.5rem 0 0.5rem;
    z-index: 2;
  }

  .era-title {
    font-family: 'Cinzel', serif;
    font-size: 11px;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    padding: 6px 20px;
    border: 1px solid currentColor;
    background: var(--dark-bg);
  }

  .era-title.primitif { color: #9b7fd4; border-color: rgba(155,127,212,0.5); }
  .era-title.dofus { color: var(--dofus-amber); border-color: rgba(212,129,58,0.5); }
  .era-title.wakfu { color: var(--wakfu-teal); border-color: rgba(46,207,176,0.5); }
  .era-title.waven { color: var(--waven-blue); border-color: rgba(74,158,255,0.5); }

  /* EVENT CARD */
  .event {
    display: grid;
    grid-template-columns: 1fr 40px 1fr;
    gap: 0;
    margin: 0;
    align-items: start;
    position: relative;
    padding: 1.2rem 0;
  }

  .event:nth-child(odd) .event-content { grid-column: 1; text-align: right; }
  .event:nth-child(odd) .event-dot-col { grid-column: 2; }
  .event:nth-child(odd) .event-empty { grid-column: 3; }

  .event:nth-child(even) .event-empty { grid-column: 1; }
  .event:nth-child(even) .event-dot-col { grid-column: 2; }
  .event:nth-child(even) .event-content { grid-column: 3; text-align: left; }

  .event-dot-col {
    display: flex;
    justify-content: center;
    padding-top: 8px;
    position: relative;
    z-index: 2;
  }

  .event-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    border: 2px solid var(--dark-bg);
    flex-shrink: 0;
    position: relative;
  }

  .event-dot.primitif { background: #9b7fd4; box-shadow: 0 0 8px rgba(155,127,212,0.6); }
  .event-dot.dofus { background: var(--dofus-amber); box-shadow: 0 0 8px rgba(212,129,58,0.6); }
  .event-dot.wakfu { background: var(--wakfu-teal); box-shadow: 0 0 8px rgba(46,207,176,0.6); }
  .event-dot.waven { background: var(--waven-blue); box-shadow: 0 0 8px rgba(74,158,255,0.6); }
  .event-dot.major {
    width: 14px;
    height: 14px;
  }

  .event-content {
    padding: 0 16px;
    cursor: pointer;
  }

  .event-content.static-open {
    cursor: default;
  }

  .event-date {
    font-family: 'Cinzel', serif;
    font-size: 10px;
    letter-spacing: 0.2em;
    margin-bottom: 4px;
    opacity: 0.7;
  }

  .event-title {
    font-family: 'Cinzel', serif;
    font-size: 15px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 6px;
    transition: color 0.2s;
  }

  .event:nth-child(odd) .event-title { color: var(--text-main); }
  .event:nth-child(even) .event-title { color: var(--text-main); }

  .event-content:hover .event-title { color: var(--gold-light); }

  .event-preview {
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 18px;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .event-preview.full-preview {
    display: block;
    -webkit-line-clamp: unset;
    -webkit-box-orient: initial;
    overflow: visible;
  }

  /* EXPANDED CARD */
  .event-expanded {
    /* Le detail reste dans le DOM mais ferme tant que toggleExp(id) ne l'active pas. */
    display: none;
    margin-top: 8px;
    padding: 12px 14px;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    font-family: 'Crimson Text', Georgia, serif;
    font-size: 18px;
    line-height: 1.75;
    color: var(--text-main);
  }

  .event-expanded.open { display: block; }

  .event-expanded ul {
    list-style: none;
    padding: 0;
  }

  .event-expanded ul li {
    padding: 3px 0;
    padding-left: 14px;
    position: relative;
  }

  .event-expanded ul li::before {
    content: '◆';
    position: absolute;
    left: 0;
    font-size: 6px;
    top: 7px;
    opacity: 0.5;
  }

  /* COLOR PER ERA */
  .primitif .event-date { color: #9b7fd4; }
  .dofus .event-date { color: var(--dofus-amber); }
  .wakfu .event-date { color: var(--wakfu-teal); }
  .waven .event-date { color: var(--waven-blue); }

  /* LEGEND */
  .legend {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding: 2rem 1rem 0;
    flex-wrap: wrap;
  }

  .legend-item {
    display: flex;
    align-items: center;
    gap: 7px;
    font-family: 'Cinzel', serif;
    font-size: 10px;
    letter-spacing: 0.15em;
    color: var(--text-muted);
    text-transform: uppercase;
  }

  .legend-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
  }

  /* Couleurs de la legende: sorties du HTML pour eviter les styles inline. */
  .legend-dot-primitif { background: #9b7fd4; }
  .legend-dot-dofus { background: var(--dofus-amber); }
  .legend-dot-wakfu { background: var(--wakfu-teal); }
  .legend-dot-waven { background: var(--waven-blue); }

  /* ERA BACKGROUNDS — global fixed layers */
  .era-bg { position: relative; }
  .era-bg > * { position: relative; z-index: 1; }

  #bg-layer {
    /* Fonds pleine page: le JS alterne .active pendant le scroll en mode "Toutes les eres". */
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
  }

  #bg-layer .bg-img {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0;
    transition: opacity 1.2s ease;
  }

  #bg-layer .bg-img.active { opacity: 0.15; }

  /* Chemins relatifs au fichier CSS: on remonte de styles/ vers assets/. */
  #bg-layer .bg-primitif { background-image: url('../assets/chronologie/bg_primitive.png'); }
  #bg-layer .bg-dofus    { background-image: url('../assets/chronologie/bg_dofus.png'); }
  #bg-layer .bg-wakfu    { background-image: url('../assets/chronologie/bg_wakfu.png'); }
  #bg-layer .bg-waven    { background-image: url('../assets/chronologie/bg_waven.png'); }
  /* Era section anchors for scroll detection */
  .era-section-wrap { position: relative; }
  .event {
    opacity: 0;
    transform: translateY(16px);
    animation: fadeUp 0.4s forwards;
  }

  .timeline-tail {
    height: 38vh;
    min-height: 220px;
    pointer-events: none;
  }

  @keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
  }

  /* RESPONSIVE */
  @media (max-width: 600px) {
    .site-topbar {
      align-items: flex-start;
      padding: 0.9rem 1rem;
    }
    .top-nav {
      width: 100%;
      gap: 0.15rem;
    }
    .nav-link {
      padding: 0.55rem 0.65rem;
      font-size: 0.68rem;
    }
    .nav-menu {
      min-width: 180px;
    }
    .timeline::before { left: 20px; }
    .event { grid-template-columns: 28px 1fr !important; }
    .event-dot-col { grid-column: 1 !important; }
    .event-content { grid-column: 2 !important; text-align: left !important; }
    .event-empty { display: none !important; }
    .event-content { padding-left: 12px; }
  }