/* ============================================
       VARIABLES CSS
       ============================================ */
    :root {
      /* Couleurs */
      --bg: #0f1115;
      --fg: #eef1f6;
      --muted: #b6bdc9;
      --card: #171a22;
      --card2: #1b1f2b;
      --line: #242837;
      --brand: #ffd34d;
      --accent: #7aa2ff;
      
      /* Layout */
      --max: 960px;
      --radius: 12px;
      --shadow: 0 8px 32px rgba(0,0,0,.35);
      --navH: 64px;
    }

    /* ============================================
       RESET & BASE
       ============================================ */
    * {
      box-sizing: border-box;
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      margin: 0;
      font: 16px/1.6 system-ui, -apple-system, "Segoe UI", Roboto, Arial;
      color: var(--fg);
      background: var(--bg);
    }
    
    a {
      color: var(--accent);
      text-decoration: none;
    }
    
    a:hover {
      text-decoration: underline;
    }
    
    h1, h2, h3 {
      line-height: 1.25;
    }
    
    .wrap {
      max-width: var(--max);
      margin: 0 auto;
      padding: 0 16px;
    }

    /* ============================================
       FOND D'IMAGES (PARALLAXE VERTICAL)
       ============================================ */
    .bg {
      position: fixed;
      inset: 0;
      z-index: -1;
      overflow: hidden;
      pointer-events: none;
      background: #0b0d12;
    }
    
    .bg::after {
      content: "";
      position: absolute;
      inset: 0;
      background: rgba(8,10,14,.55);
    }
    
    .bg-track {
      position: absolute;
      top: 0;
      left: 0;
      width: 100vw;
      display: flex;
      flex-direction: column;
      gap: 0;
      will-change: transform;
    }
    
    .bg-track img {
      width: 100vw;
      height: auto;
      display: block;
      object-fit: cover;
      filter: saturate(0.9) contrast(1.05);
    }

    /* ============================================
       HEADER & NAVIGATION
       ============================================ */
    header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(15,17,21,.9);
      backdrop-filter: saturate(1.1) blur(6px);
      border-bottom: 1px solid var(--line);
    }
    
    .nav {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 12px 0;
    }
    
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
    }
    
    .brand img {
      width: 137px;
      height: 75px;
      object-fit: contain;
      display: block;
    }
    
    .brand span {
      letter-spacing: .5px;
    }
    
    .menu {
      margin-left: auto;
    }
    
    .menu ul {
      display: flex;
      gap: 18px;
      list-style: none;
      padding: 0;
      margin: 0;
    }
    
    .menu a {
      display: block;
      padding: 8px 10px;
      color: var(--fg);
    }

    /* Bouton Hamburger (caché en desktop) */
    .nav-toggle {
      display: none;
      margin-left: auto;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      background: transparent;
      color: var(--fg);
      border-radius: 10px;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }
    
    .nav-toggle:focus {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }
    
    .nav-toggle .bars {
      position: relative;
      width: 22px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
      transition: transform .25s ease, background-color .2s;
    }
    
    .nav-toggle .bars::before,
    .nav-toggle .bars::after {
      content: "";
      position: absolute;
      left: 0;
      width: 22px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
      transition: transform .25s ease, opacity .2s, top .25s ease;
    }
    
    .nav-toggle .bars::before {
      top: -7px;
    }
    
    .nav-toggle .bars::after {
      top: 7px;
    }

    /* Animation de la croix quand le menu est ouvert */
    body.menu-open .nav-toggle .bars {
      background-color: transparent;
    }
    
    body.menu-open .nav-toggle .bars::before {
      top: 0;
      transform: rotate(45deg);
    }
    
    body.menu-open .nav-toggle .bars::after {
      top: 0;
      transform: rotate(-45deg);
    }

    /* ============================================
       CARTES & SECTIONS
       ============================================ */
    section {
      padding: 56px 0;
    }
    
    .card {
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 20px;
    }
    
    .card.alt {
      background: linear-gradient(180deg, rgba(255,211,77,.08), rgba(122,162,255,.08));
      border-color: rgba(255,255,255,.08);
    }

    /* Grille 3 colonnes responsive */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 16px;
    }

    /* ============================================
       CONTACT (GRILLE HORIZONTALE)
       ============================================ */
    .contact-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0,1fr));
      gap: 16px;
      align-items: stretch;
    }
    
    .contact-card {
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: 10px;
      padding: 16px;
    }
    
    .contact-card h3 {
      margin: 0 0 8px;
    }
    
    .contact-card p {
      margin: 0;
      color: var(--muted);
    }
    
    .noscript-note {
      display: inline-block;
      font-size: .9em;
      opacity: .75;
      margin-left: .35em;
    }

    /* ============================================
       IMAGE FLOTTANTE (PARAGRAPHE 1)
       ============================================ */
    .flotte {
      float: left;
    }
    
    .flotte img {
      height: auto;
      display: block;
      border-radius: 10px;
      border: 1px solid var(--line);
      background: #0b0d12;
      object-fit: cover;
    }

    /* ============================================
       MOSAÏQUE (MASONRY CSS COLUMNS)
       ============================================ */
    .mosaic {
      max-width: 1200px;
      margin: 0 auto;
      column-width: 220px;
      column-gap: 12px;
    }
    
    .mosaic a {
      display: inline-block;
      width: 100%;
      margin: 0 0 12px;
      break-inside: avoid;
      -webkit-column-break-inside: avoid;
      -moz-column-break-inside: avoid;
      line-height: 0;
    }
    
    .mosaic img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
      border-radius: 10px;
      border: 1px solid var(--line);
      background: #0b0d12;
    }

    /* ============================================
       LIGHTBOX
       ============================================ */
    .lightbox {
      position: fixed;
      inset: 0;
      z-index: 1000;
      display: none;
      align-items: center;
      justify-content: center;
      background: rgba(0,0,0,.88);
      padding: 24px;
    }
    
    .lightbox.open {
      display: flex;
    }
    
    .lightbox img {
      max-width: min(96vw, 1400px);
      max-height: 86vh;
      width: auto;
      height: auto;
      border-radius: 12px;
      box-shadow: 0 20px 80px rgba(0,0,0,.6), 0 0 0 1px rgba(255,255,255,.08) inset;
    }
    
    .lightbox .lb-close {
      position: fixed;
      top: 18px;
      right: 18px;
      width: 42px;
      height: 42px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,.25);
      background: rgba(0,0,0,.35);
      color: #fff;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }
    
    .lightbox .lb-prev,
    .lightbox .lb-next {
      position: fixed;
      top: 50%;
      transform: translateY(-50%);
      width: 46px;
      height: 46px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,.25);
      background: rgba(0,0,0,.35);
      color: #fff;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
    }
    
    .lightbox .lb-prev {
      left: 18px;
    }
    
    .lightbox .lb-next {
      right: 18px;
    }
    
    .lightbox button:focus {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    /* Légende dans la lightbox */
    .lb-caption {
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0,0,0,.85);
      color: #fff;
      padding: 14px 16px;
      border-top: 1px solid rgba(255,255,255,.12);
      font-size: 15px;
      line-height: 1.45;
      max-height: 35vh;
      overflow: auto;
      -webkit-overflow-scrolling: touch;
    }

    /* ============================================
       RESPONSIVE - TABLETTE (960px et moins)
       ============================================ */
    @media (max-width: 960px) {
      /* Navigation mobile */
      .nav-toggle {
        display: inline-flex;
      }

      /* Menu plein écran sous la barre */
      .menu {
        position: fixed;
        left: 0;
        right: 0;
        top: var(--navH);
        background: rgba(15,17,21,.98);
        backdrop-filter: saturate(1.1) blur(8px);
        border-top: 1px solid var(--line);
        transform: translateY(-12px);
        opacity: 0;
        pointer-events: none;
        transition: opacity .25s ease, transform .25s ease;
        margin-left: 0;
      }
      
      body.menu-open .menu {
        transform: none;
        opacity: 1;
        pointer-events: auto;
      }

      .menu ul {
        flex-direction: column;
        gap: 0;
        padding: 8px 12px;
      }
      
      .menu a {
        padding: 14px 8px;
        font-size: 18px;
      }

      /* Empêche le scroll du body quand le menu est ouvert */
      body.menu-open {
        overflow: hidden;
      }

      /* Grilles passent à 2 colonnes */
      .grid-3,
      .contact-grid {
        grid-template-columns: repeat(2, minmax(0,1fr));
      }

      /* Mosaïque - adaptation des colonnes */
      .mosaic {
        column-width: 200px;
        column-gap: 10px;
      }
    }

    /* ============================================
       RESPONSIVE - MOBILE (640px et moins)
       ============================================ */
    @media (max-width: 640px) {
      /* Fond plus sombre pour améliorer la lisibilité */
      .bg::after {
        background: rgba(8,10,14,.65);
      }

      /* Grilles passent à 1 colonne */
      .grid-3,
      .contact-grid {
        grid-template-columns: 1fr;
      }

      /* Légende lightbox plus compacte */
      .lb-caption {
        font-size: 14px;
        padding: 12px 14px;
      }
    }

    /* ============================================
       RESPONSIVE - PETIT MOBILE (560px et moins)
       ============================================ */
    @media (max-width: 560px) {
      .mosaic {
        column-width: 150px;
        column-gap: 8px;
      }
    }

    /* ============================================
       RESPONSIVE - MOSAÏQUE INTERMÉDIAIRE
       ============================================ */
    @media (max-width: 800px) {
      .mosaic {
        column-width: 180px;
        column-gap: 10px;
      }
    }

    @media (max-width: 1200px) {
      .mosaic {
        column-width: 200px;
        column-gap: 10px;
      }
    }