:root {
      --primary: #2563eb;
      --secondary: #1e293b;
      --bg: #f1f5f9;
      --card-bg: #fff;
      --success: #22c55e;
      --warning: #f59e0b;
      --danger: #ef4444;
    }

    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: "Poppins", sans-serif;
    }

    body {
      display: flex;
      min-height: 100vh;
      background: var(--bg);
      box-sizing: border-box;
    }

    /* SIDEBAR */
    .sidebar {
      width: 220px;
      background: var(--secondary);
      color: #fff;
      position: fixed;
      top: 0;
      bottom: 0;
      left: 0;
      padding: 20px;
      display: flex;
      flex-direction: column;
      transition: 0.3s;
    }

    .sidebar h2 {
      text-align: center;
      font-size: 22px;
      margin-bottom: 30px;
    }

    .sidebar a {
      color: #cbd5e1;
      text-decoration: none;
      margin: 10px 0;
      padding: 12px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      transition: 0.3s;
    }

    .sidebar a:hover,
    .sidebar a.active {
      background: var(--primary);
      color: #fff;
    }

    .sidebar a i {
      margin-right: 10px;
    }

    /* MAIN CONTENT */
    .main-content {
      margin-left: 220px;
      flex: 8;
      padding: 25px;
      transition: 0.3s;
    }

    /* HEADER / TOPBAR */
    .header {
      background: var(--card-bg);
      padding: 15px 25px;
      border-radius: 10px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    }

    .search-bar input {
      padding: 8px 12px;
      border: 1px solid #e2e8f0;
      border-radius: 6px;
      outline: none;
      width: 200px;
      transition: 0.3s;
    }

    .search-bar input:focus {
      border-color: var(--primary);
    }

    .icons {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .icon {
      position: relative;
      cursor: pointer;
      font-size: 20px;
      color: #475569;
    }

    .badge {
      position: absolute;
      top: -6px;
      right: -8px;
      background: var(--danger);
      color: #fff;
      border-radius: 50%;
      font-size: 10px;
      padding: 2px 5px;
    }

    .user img {
      width: 35px;
      height: 35px;
      border-radius: 50%;
    }

    /* CARDS */
    .cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
      gap: 20px;
      margin: 25px 0;
    }

    .card {
      background: var(--card-bg);
      padding: 20px;
      border-radius: 12px;
      box-shadow: 0 3px 10px rgba(0,0,0,0.05);
      transition: 0.2s;
    }

    .card:hover {
      transform: translateY(-5px);
    }

    .card h3 {
      font-size: 16px;
      color: #64748b;
    }

    .card .value {
      font-size: 26px;
      font-weight: 600;
      margin-top: 8px;
    }

    .card.success { border-left: 5px solid var(--success); }
    .card.warning { border-left: 5px solid var(--warning); }
    .card.danger { border-left: 5px solid var(--danger); }

    /* CHARTS */
    .charts {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .chart-container {
      background: var(--card-bg);
      padding: 20px;
      border-radius: 12px;
      box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    }

    .chart-container h2 {
      font-size: 18px;
      margin-bottom: 10px;
    }

    /* RESPONSIVE */
    @media (max-width: 992px) {
      .charts {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .sidebar {
        width: 70px;
      }
      .sidebar h2, .sidebar a span {
        display: none;
      }
      .main-content {
        margin-left: 70px;
      }
      .search-bar input {
        width: 120px;
      }
    }

    @media (max-width: 480px) {
      .cards {
        grid-template-columns: 1fr;
      }
    }