/* roulang page: index */
:root {
            --primary: #1E40AF;
            --primary-light: #2563EB;
            --bg-base: #F8FAFC;
            --card-bg: #FFFFFF;
            --border-ui: #E2E8F0;
            --heading: #0F172A;
            --body: #334155;
            --muted: #64748B;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-base);
            color: var(--body);
            -webkit-font-smoothing: antialiased;
        }
        .custom-scrollbar::-webkit-scrollbar {
            width: 5px;
        }
        .custom-scrollbar::-webkit-scrollbar-thumb {
            background-color: #cbd5e1;
            border-radius: 4px;
        }
        .custom-scrollbar::-webkit-scrollbar-track {
            background: transparent;
        }
        .card-transition {
            transition: all 0.25s ease-in-out;
        }
        .card-transition:hover {
            transform: translateY(-3px);
        }

/* roulang page: category1 */
:root {
      --primary: #1E40AF;
      --primary-light: #2563EB;
      --bg-base: #F8FAFC;
      --card-bg: #FFFFFF;
      --border-ui: #E2E8F0;
      --heading: #0F172A;
      --body: #334155;
      --muted: #64748B;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-base);
      color: var(--body);
      -webkit-font-smoothing: antialiased;
    }
    .card-transition {
      transition: all 0.25s ease-in-out;
    }
    .card-transition:hover {
      transform: translateY(-3px);
    }
    .filter-btn-active {
      background-color: #1E40AF;
      color: #FFFFFF;
      border-color: #1E40AF;
    }
    .filter-btn {
      background-color: #FFFFFF;
      color: #475569;
      border-color: #E2E8F0;
    }
    .filter-btn:hover {
      background-color: #F1F5F9;
      color: #1E40AF;
    }