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

  :root {
    --gold:      #c9a84c;
    --gold-glow: rgba(201,168,76,0.25);
    --gold-pale: #e8d49a;
    --dark:      #080810;
    --dark-2:    #0e0e1c;
    --dark-3:    #14142a;
    --cream:     #f0ebe0;
    --muted:     rgba(240,235,224,0.5);
    --border:    rgba(240,235,224,0.08);
    --sq-light:  #f0d9b5;
    --sq-dark:   #b58863;
    --sq-sel:    rgba(106,168,79,0.7);
    --sq-move:   rgba(106,168,79,0.45);
    --sq-check:  rgba(220,50,50,0.6);
    --sq-last:   rgba(201,168,76,0.35);
    --board-size: min(92vw, 62vh, 560px);
  }

  html { font-size:16px; }
  body {
    background: var(--dark);
    color: var(--cream);
    font-family: 'DM Sans', sans-serif;
    font-weight: 300;
    min-height: 100vh;
    overflow-x: hidden;
  }

  /* ═══ HEADER ════════════════════════════════════════════════════════════ */
  header {
    position: fixed; top:0; left:0; right:0; z-index:200;
    height: 64px;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 4vw;
    background: rgba(8,8,16,0.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
  }
  .logo {
    font-family: 'Playfair Display', serif;
    font-size: 1.1rem; color: var(--gold);
    text-decoration: none; display:flex; align-items:center; gap:8px;
  }
  .logo-icon {
    width: 26px;
    height: 26px;
    object-fit: contain;
    display: block;
  }
  .logo-sub {
    font-family:'DM Sans',sans-serif; font-size:0.58rem;
    letter-spacing:0.18em; text-transform:uppercase;
    color:var(--muted); display:block; margin-top:-2px;
  }
  nav { display:flex; align-items:center; gap:1.5rem; }
  nav a {
    font-size:0.78rem; letter-spacing:0.1em; text-transform:uppercase;
    color:var(--muted); text-decoration:none; transition:color 0.2s;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  nav a:hover, nav a.active { color:var(--cream); }
  nav a.active { color:var(--gold); }

  .menu-toggle {
    display: none !important;
    border: 1px solid var(--gold-glow);
    background: transparent;
    color: var(--gold);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.72rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    min-height: 44px;
    align-items: center;
    justify-content: center;
  }

  /* ═══ LAYOUT PRINCIPAL ══════════════════════════════════════════════════ */
  main {
    padding-top: 64px;
    min-height: 100vh;
    display: flex; flex-direction: column;
  }

  /* ═══ LOBBY ════════════════════════════════════════════════════════════= */
  #screen-lobby {
    flex:1; display:flex; align-items:center; justify-content:center;
    padding: 40px 4vw;
  }
  .lobby-wrap {
    max-width: 820px; width:100%;
    text-align: center;
  }
  .lobby-eyebrow {
    font-size:0.68rem; letter-spacing:0.25em; text-transform:uppercase;
    color:var(--gold); margin-bottom:1rem;
    display:inline-flex; align-items:center; gap:10px;
  }
  .lobby-eyebrow::before, .lobby-eyebrow::after {
    content:''; display:inline-block; width:24px; height:1px; background:var(--gold);
  }
  .lobby-title {
    font-family:'Playfair Display',serif;
    font-size:clamp(2rem,4vw,3.2rem); font-weight:700;
    line-height:1.1; margin-bottom:0.75rem;
  }
  .lobby-sub {
    color:var(--muted); font-size:1rem; margin-bottom:3rem;
  }

  /* Niveau */
  .level-grid {
    display:grid; grid-template-columns:repeat(3,1fr); gap:12px;
    margin-bottom:2.5rem;
  }
  .level-btn {
    background: var(--dark-2);
    border: 1px solid var(--border);
    color: var(--cream);
    padding: 28px 20px;
    cursor: pointer;
    transition: all 0.25s;
    position: relative; overflow:hidden;
    font-family:'DM Sans',sans-serif;
  }
  .level-btn::after {
    content:''; position:absolute; top:0;left:0;right:0; height:2px;
    background:linear-gradient(to right, transparent, var(--gold), transparent);
    transform:scaleX(0); transition:transform 0.3s;
  }
  .level-btn:hover::after, .level-btn.active::after { transform:scaleX(1); }
  .level-btn:hover, .level-btn.active {
    background:var(--dark-3); border-color:var(--gold-glow);
  }
  .level-btn.active { border-color:var(--gold); }
  .level-icon { font-size:2rem; display:block; margin-bottom:10px; }
  .level-name {
    font-family:'Playfair Display',serif;
    font-size:1.1rem; display:block; margin-bottom:4px;
  }
  .level-elo { font-size:0.75rem; color:var(--gold); letter-spacing:0.1em; }
  .level-desc { font-size:0.8rem; color:var(--muted); margin-top:6px; line-height:1.4; }

  /* Couleur */
  .color-row {
    display:flex; align-items:center; justify-content:center; gap:10px;
    margin-bottom:2.5rem;
  }
  .color-label {
    font-size:0.72rem; letter-spacing:0.15em; text-transform:uppercase;
    color:var(--muted);
  }
  .color-opts { display:flex; gap:8px; }
  .color-btn {
    width:44px; height:44px; border-radius:50%;
    border:2px solid var(--border); cursor:pointer;
    transition:all 0.2s; display:flex; align-items:center; justify-content:center;
    font-size:1.2rem;
    background: transparent;
  }
  .color-btn[data-color="white"] { background:#f0ebe0; color:#080810; }
  .color-btn[data-color="black"] { background:#1a1a2e; color:#f0ebe0; }
  .color-btn[data-color="random"] { background:linear-gradient(135deg,#f0ebe0 50%,#1a1a2e 50%); color:transparent; font-size:0; }
  .color-btn[data-color="random"]::after { content:'?'; font-size:1rem; color:var(--gold); }
  .color-btn.active, .color-btn:hover { border-color:var(--gold); transform:scale(1.1); }

  .play-btn {
    background:var(--gold); color:var(--dark);
    font-family:'DM Sans',sans-serif; font-weight:500;
    font-size:0.85rem; letter-spacing:0.15em; text-transform:uppercase;
    padding:16px 56px; border:none; cursor:pointer;
    transition:all 0.25s; width:100%; max-width:320px;
    box-shadow:0 0 30px var(--gold-glow);
    min-height: 48px;
  }
  .play-btn:hover {
    background:var(--gold-pale);
    box-shadow:0 4px 40px rgba(201,168,76,0.4);
    transform:translateY(-2px);
  }

  /* ═══ SEARCHING ══════════════════════════════════════════════════════════ */
  #screen-searching {
    flex:1; display:none; align-items:center; justify-content:center;
    flex-direction:column; gap:2rem; text-align:center; padding:40px;
  }
  .search-avatar {
    width:80px; height:80px; border-radius:50%;
    background:var(--dark-3); border:2px solid var(--border);
    display:flex; align-items:center; justify-content:center;
    font-size:2rem; margin:0 auto;
    animation: pulse 1.5s infinite;
  }
  @keyframes pulse {
    0%,100%{ box-shadow:0 0 0 0 var(--gold-glow); }
    50%{ box-shadow:0 0 0 16px transparent; }
  }
  .search-title {
    font-family:'Playfair Display',serif;
    font-size:1.6rem;
  }
  .search-dots span {
    display:inline-block; width:6px; height:6px; border-radius:50%;
    background:var(--gold); margin:0 3px;
    animation:dot 1.2s infinite;
  }
  .search-dots span:nth-child(2){ animation-delay:.2s; }
  .search-dots span:nth-child(3){ animation-delay:.4s; }
  @keyframes dot{ 0%,80%,100%{transform:scale(0);opacity:0.3} 40%{transform:scale(1);opacity:1} }
  .search-sub { color:var(--muted); font-size:0.9rem; }
  .search-cancel {
    background:transparent; border:1px solid var(--border);
    color:var(--muted); font-family:'DM Sans',sans-serif;
    font-size:0.75rem; letter-spacing:0.1em; text-transform:uppercase;
    padding:10px 28px; cursor:pointer; transition:all 0.2s;
  }
  .search-cancel:hover { border-color:var(--cream); color:var(--cream); }

  /* ═══ GAME ════════════════════════════════════════════════════════════════ */
  #screen-game {
    flex:1; display:none;
    padding: 16px 3vw 24px;
    gap: 20px;
    align-items: flex-start;
    justify-content: center;
  }
  #screen-game.active { display:flex; }

  /* Sidebar */
  .game-side {
    display:flex; flex-direction:column; gap:12px;
    width: 240px; flex-shrink:0;
  }

  .player-card {
    background:var(--dark-2); border:1px solid var(--border);
    padding:16px 18px; display:flex; align-items:center; gap:12px;
  }
  .player-card.active-turn { border-color:var(--gold); }
  .player-avatar {
    width:44px; height:44px; border-radius:50%;
    background:var(--dark-3); border:1px solid var(--border);
    display:flex; align-items:center; justify-content:center;
    font-size:1.3rem; flex-shrink:0;
  }
  .player-info { flex:1; min-width:0; }
  .player-name {
    font-family:'Playfair Display',serif;
    font-size:0.95rem; white-space:nowrap; overflow:hidden; text-overflow:ellipsis;
  }
  .player-elo {
    font-size:0.72rem; color:var(--gold);
    letter-spacing:0.1em;
  }
  .player-clock {
    font-family:'Playfair Display',serif;
    font-size:1.1rem; font-weight:700;
    color:var(--cream); min-width:48px; text-align:right;
  }
  .player-clock.ticking { color:var(--gold); }
  .player-clock.low { color:#e55; animation:blink 0.8s infinite; }
  @keyframes blink{ 0%,100%{opacity:1} 50%{opacity:0.4} }

  .move-list {
    background:var(--dark-2); border:1px solid var(--border);
    flex:1; overflow-y:auto; padding:14px;
    max-height:320px;
    scrollbar-width:thin;
  }
  .move-list-title {
    font-size:0.65rem; letter-spacing:0.2em; text-transform:uppercase;
    color:var(--muted); margin-bottom:10px; display:block;
  }
  .move-row {
    display:grid; grid-template-columns:28px 1fr 1fr; gap:4px;
    margin-bottom:3px; font-size:0.82rem;
  }
  .move-num { color:var(--muted); font-size:0.75rem; }
  .move-san {
    padding:2px 6px; cursor:default;
    border-radius:2px; transition:background 0.15s;
    font-family:'DM Sans',sans-serif;
  }
  .move-san:hover { background:var(--dark-3); }
  .move-san.current { background:var(--gold-glow); color:var(--gold); }

  .game-controls {
    display:flex; gap:8px;
  }
  .ctrl-btn {
    flex:1; background:var(--dark-2); border:1px solid var(--border);
    color:var(--muted); padding:10px; cursor:pointer;
    font-size:1rem; transition:all 0.2s;
  }
  .ctrl-btn i { pointer-events: none; }
  .ctrl-btn:hover { border-color:var(--gold-glow); color:var(--cream); }

  /* Échiquier */
  .board-wrap {
    position:relative; flex-shrink:0;
  }
  #chessboard {
    display:grid;
    grid-template-columns:repeat(8,1fr);
    grid-template-rows:repeat(8,1fr);
    width: var(--board-size);
    height: var(--board-size);
    border:3px solid #5a3010;
    box-shadow:0 0 60px rgba(0,0,0,0.8), 0 0 20px var(--gold-glow);
    position:relative;
    user-select:none;
  }

  .sq {
    position:relative; cursor:pointer;
    display:flex; align-items:center; justify-content:center;
    transition:background 0.12s;
  }
  .sq.light { background:var(--sq-light); }
  .sq.dark  { background:var(--sq-dark); }
  .sq.selected { background:var(--sq-sel) !important; }
  .sq.move-hint::after {
    content:''; position:absolute;
    width:30%; height:30%; border-radius:50%;
    background:rgba(0,0,0,0.2); pointer-events:none;
    z-index:1;
  }
  .sq.move-hint.has-piece::after {
    width:100%; height:100%; border-radius:0;
    background:transparent;
    box-shadow:inset 0 0 0 4px rgba(0,0,0,0.25);
  }
  .sq.last-from, .sq.last-to { background:var(--sq-last) !important; }
  .sq.in-check { background:var(--sq-check) !important; }

  .piece {
    font-size: calc(var(--board-size) / 10);
    line-height:1; z-index:2; position:relative;
    transition:transform 0.1s;
    pointer-events:none;
  }
  .piece.pw {
    color: #f5edd8;
    filter: drop-shadow(0 2px 3px rgba(0,0,0,0.85)) drop-shadow(0 0 1px rgba(0,0,0,1));
  }
  .piece.pb {
    color: #1a0e04;
    filter: drop-shadow(0 1px 0px rgba(255,255,255,0.4)) drop-shadow(0 2px 3px rgba(0,0,0,0.5));
  }

  /* Coordonnées — EN DEHORS de la grille */
  .board-outer {
    position: relative;
    display: inline-block;
  }
  .coord-file {
    display:flex;
    padding-left: 18px;
  }
  .coord-rank {
    position:absolute; top:0; bottom:0; left:0;
    display:flex; flex-direction:column;
    width: 18px;
  }
  .coord-file span, .coord-rank span {
    flex:1; display:flex; align-items:center; justify-content:center;
    font-size:0.65rem; color:var(--muted); letter-spacing:0.05em;
    font-family:'DM Sans',sans-serif;
  }

  /* Status bar */
  .status-bar {
    background:var(--dark-2); border:1px solid var(--border);
    padding:10px 16px; text-align:center;
    font-size:0.82rem; color:var(--muted);
    margin-top:8px;
    min-height:38px; display:flex; align-items:center; justify-content:center;
  }
  .status-bar.highlight { color:var(--gold); border-color:var(--gold-glow); }

  /* ═══ RESULT MODAL ═══════════════════════════════════════════════════════ */
  #modal-result {
    display:none; position:fixed; inset:0; z-index:500;
    background:rgba(8,8,16,0.88); backdrop-filter:blur(8px);
    align-items:center; justify-content:center;
  }
  #modal-result.open { display:flex; }
  .modal-box {
    background:var(--dark-2); border:1px solid var(--gold-glow);
    padding:52px 56px; text-align:center; max-width:420px; width:90%;
    animation:modalIn 0.4s cubic-bezier(0.16,1,0.3,1);
  }
  @keyframes modalIn{ from{opacity:0;transform:scale(0.9) translateY(20px)} to{opacity:1;transform:none} }
  .modal-result-icon { font-size:3.2rem; color:var(--gold); display:block; margin-bottom:16px; }
  .modal-result-title {
    font-family:'Playfair Display',serif;
    font-size:2rem; margin-bottom:8px;
  }
  .modal-result-sub { color:var(--muted); font-size:0.95rem; margin-bottom:32px; }
  .modal-btns { display:flex; flex-direction:column; gap:10px; }
  .modal-btn {
    padding:13px 32px; font-family:'DM Sans',sans-serif;
    font-size:0.8rem; letter-spacing:0.12em; text-transform:uppercase;
    cursor:pointer; transition:all 0.2s; border:none;
  }
  .modal-btn.primary { background:var(--gold); color:var(--dark); }
  .modal-btn.primary:hover { background:var(--gold-pale); }
  .modal-btn.secondary {
    background:transparent; border:1px solid var(--border); color:var(--muted);
  }
  .modal-btn.secondary:hover { border-color:var(--cream); color:var(--cream); }

  /* ═══ PROMO BLOC ═════════════════════════════════════════════════════════ */
  #promo {
    border-top:1px solid var(--border);
    padding:48px 5vw;
    display:grid; grid-template-columns:repeat(3,1fr); gap:1px;
    background:var(--border);
  }
  .promo-item {
    background:var(--dark); padding:36px 32px;
    text-decoration:none; color:var(--cream);
    transition:background 0.25s;
  }
  .promo-item:hover { background:var(--dark-2); }
  .promo-icon { font-size:1.45rem; margin-bottom:12px; display:block; color:var(--gold); }
  .promo-title {
    font-family:'Playfair Display',serif;
    font-size:1.05rem; margin-bottom:6px;
  }
  .promo-desc { font-size:0.85rem; color:var(--muted); line-height:1.6; }

  /* ═══ FOOTER ══════════════════════════════════════════════════════════════ */
  footer {
    background:var(--dark-2); border-top:1px solid var(--border);
    padding:28px 4vw;
    display:flex; justify-content:space-between; align-items:center;
    flex-wrap:wrap; gap:12px;
  }
  .footer-brand {
    color: var(--gold);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 44px;
  }
  .footer-logo-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
    display: block;
  }
  .footer-links {
    display:flex;
    gap:20px;
    flex-wrap:wrap;
  }
  footer a {
    color:var(--muted);
    font-size:0.75rem;
    text-decoration:none;
    letter-spacing:0.08em;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
  footer a:hover { color:var(--cream); }
  .footer-copy { font-size:0.72rem; color:var(--muted); opacity:0.5; }

  @media(max-width:900px){
    #screen-game { flex-direction:column; align-items:center; }
    .game-side { width:100%; max-width:560px; flex-direction:row; flex-wrap:wrap; }
    .move-list { display:none; }
    .level-grid { grid-template-columns:1fr; }
    #promo { grid-template-columns:1fr; }
    .footer-links { justify-content:center; }
    footer { justify-content:center; text-align:center; }
  }

  @media(max-width:760px){
    header {
      height:auto;
      min-height:72px;
      flex-wrap:wrap;
      gap:8px 14px;
      padding-top:10px;
      padding-bottom:10px;
    }
    .menu-toggle { display:inline-flex !important; }
    header nav[data-mobile-nav] {
      display:none;
      position:absolute;
      left:0; right:0; top:100%;
      background: rgba(8,8,16,0.98);
      backdrop-filter: blur(8px);
      border-bottom:1px solid var(--border);
      flex-direction:column;
      gap:0;
      padding:6px 0 10px;
      width:auto;
    }
    header.nav-open nav[data-mobile-nav] { display:flex; }
    header nav[data-mobile-nav] a {
      width:100%;
      padding:12px 6vw;
      border-top:1px solid rgba(240,235,224,0.08);
      min-height:0;
    }
    .lobby-wrap { text-align:left; }
    .lobby-sub { margin-bottom:2rem; }
    .play-btn { max-width:100%; }
    #screen-searching { padding-left:6vw; padding-right:6vw; }
    #screen-game {
      padding-left:2vw;
      padding-right:2vw;
      gap:12px;
    }
    .game-side {
      max-width:none;
      width:100%;
      gap:8px;
    }
    .player-card { width:100%; }
    .game-controls { width:100%; }
    .ctrl-btn { min-height:44px; }
    #promo { padding:32px 4vw; }
    .promo-item { padding:26px 20px; }
    .modal-box { padding:36px 24px; }
  }

  @media(max-width:560px){
    :root { --board-size: min(94vw, 94vw); }
    .board-wrap { width:100%; display:flex; flex-direction:column; align-items:center; }
    .coord-file { padding-left: 16px; }
    .coord-rank { width: 16px; }
    .coord-file span, .coord-rank span { font-size:0.6rem; }
    .status-bar { width:100%; }
    .color-row { flex-wrap:wrap; justify-content:flex-start; }
    .modal-result-title { font-size:1.6rem; }
  }