:root {
      --bg: #FFFFFF;
      --text: #212121;
      --text-muted: #757575;
      
      --primary: #F57C00;
      --primary-hover: #E65100;
      
      --secondary: #43A047;
      --secondary-clair: #66BB6A;
      --secondary-fonce: #2E7D32;
      --secondary-soft: #E8F5E9; /* vert très léger */
      
      --card: #F5F5F5;
      --border: #E0E0E0;
      --footer: #F5F5F5;

      --shadow: 0 6px 18px rgba(33, 33, 33, 0.06);

      --topbar-h: 64px;
      --sidebar-w: 240px;
      --radius: 16px;
      --gap: 20px;
    }

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

    html, body {
      height: 100%;
    }

    body {
      font-family: Arial, Helvetica, sans-serif;
      background: var(--bg);
      color: var(--text);
    }

    a {
      text-decoration: none;
      color: inherit;
    }

    /* Barre du haut fixe */
    .topbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--topbar-h);
      background: #fff;
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 24px;
      z-index: 1000;
    }

    .topbar .logo {
      font-size: 24px;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center; /* clé */
      gap: 10px;
    }

    .topbar .logo .beta {
      font-size: 14px;
      font-weight: 600;
      color: var(--secondary);
      margin-top: -8px; 
      margin-left: -8px; 
    }

    .topbar .top-actions {
      display: flex;
      gap: 12px;
      align-items: center;
    }

    .topbar .btn {
      background: var(--primary);
      color: white;
      border: none;
      padding: 10px 14px;
      border-radius: 10px;
      cursor: pointer;
      font-size: 14px;
    }

    .topbar .btn:hover {
      background: var(--primary-hover);
    }

    /* Menu gauche fixe */
    .sidebar {
      position: fixed;
      top: var(--topbar-h);
      left: 0;
      bottom: 0;
      width: var(--sidebar-w);
      background: #fff;
      border-right: 1px solid var(--border);
      padding: 24px 16px;
      overflow-y: auto;
    }

    .sidebar h3 {
      font-size: 13px;
      color: var(--text-muted);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 16px;
    }

    .menu {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .menu a {
      display: block;
      padding: 12px 14px;
      border-radius: 12px;
      color: var(--text);
      transition: 0.2s ease;
    }

    .menu a:hover,
    .menu a.active {
      background: var(--secondary-soft);
      color: var(--primary);
      font-weight: 600;
    }

    .menu ul {
      list-style: none;
      display: flex;
      flex-wrap: wrap;
    }

    .menu ul {
      margin: 2px 16px;
    }

    .menu ul li a {
      display: inline-block;  
      padding: 4px 4px; 
      border-radius: 8px;
      color: var(--text);
      text-decoration: none;
      transition: 0.2s ease;
      font-size: 14px;
      letter-spacing: -0.02em;
    }

    .menu ul li.active a {
      background: var(--secondary-soft);
      color: var(--primary);
    }

    .menu ul a:hover,
    .menu a.active {
      background: var(--secondary-soft);
      color: var(--primary);
      font-weight: normal;
    }

    /* Zone principale */
    .page {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    .main {
      margin-top: var(--topbar-h);
      margin-left: var(--sidebar-w);
      padding: 24px;
      flex: 1;
    }

    .content {
      display: flex;
      flex-direction: column;
      gap: var(--gap);
    }

    .cards-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: var(--gap);
    }

    .cards-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: var(--gap);
    }

    .cards-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: var(--gap);
    }

    /* Blocs larges */
    .full-block {
    }

    /* Style commun des blocs */
    .card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 22px;
    }

    .card h2,
    .card h3 {
color: var(--secondary-fonce);
      margin-bottom: 12px;
      font-size: 18px;
    }

    .card p {
      color: var(--text-muted);
      line-height: 1.5;
      font-size: 14px;
    }

    .stat-number {
      font-size: 32px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 8px;
    }

    /* Footer */
    .footer {
      margin-left: var(--sidebar-w);
      background: var(--footer);
      border-top: 1px solid var(--border);
      padding: 20px 24px;
      color: var(--text-muted);
      font-size: 14px;
    }

    /* Responsive */
    @media (max-width: 1100px) {
      .cards-4 {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      :root {
        --sidebar-w: 0px;
      }

      .sidebar {
        display: none;
      }

      .main,
      .footer {
        margin-left: 0;
      }

      .cards-4 {
        grid-template-columns: 1fr;
      }

      .topbar {
        padding: 0 16px;
      }

      .main {
        padding: 16px;
      }

      .footer {
        padding: 16px;
      }
    }