/* ===== ROOT VARIABLES ===== */
        :root {
            --bg: #0a0a1a;
            --card: #161b22;
            --card-hover: #1c2333;
            --border: #30363d;
            --text: #c9d1d9;
            --text-muted: #8b949e;
            --green: #3fb950;
            --red: #f85149;
            --blue: #58a6ff;
            --yellow: #d29922;
            --radius: 14px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition: 0.25s ease;
        }

        /* ===== RESET & BASE ===== */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        body {
            background: var(--bg);
            color: var(--text);
            font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
            line-height: 1.6;
            min-height: 100vh;
        }

        /* ===== SCROLLBAR STYLING ===== */
        ::-webkit-scrollbar { width: 6px; height: 6px; }
        ::-webkit-scrollbar-track { background: var(--bg); }
        ::-webkit-scrollbar-thumb { background: var(--border); border-radius: 10px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

        /* ===== NAVIGATION ===== */
        .admin-nav {
            background: var(--card);
            border-bottom: 1px solid var(--border);
            padding: 14px 32px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(12px);
            background: rgba(22, 27, 34, 0.92);
        }

        .admin-nav h1 {
            margin: 0;
            font-size: 20px;
            font-weight: 600;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .admin-nav h1 span {
            background: var(--blue);
            color: #fff;
            font-size: 12px;
            padding: 2px 12px;
            border-radius: 20px;
            font-weight: 500;
        }

        .admin-nav .nav-links {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        /* ===== BUTTONS ===== */
        .btn {
            padding: 8px 18px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 500;
            font-size: 13px;
            border: 1px solid var(--border);
            cursor: pointer;
            transition: all var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: transparent;
            color: var(--text);
        }

        .btn:hover {
            background: rgba(255, 255, 255, 0.05);
            border-color: var(--text-muted);
            transform: translateY(-1px);
        }

        .btn-primary {
            background: var(--blue);
            color: #fff;
            border-color: var(--blue);
        }

        .btn-primary:hover {
            background: #4a8fdb;
            border-color: #4a8fdb;
            opacity: 1;
        }

        .btn-danger {
            background: var(--red);
            color: #fff;
            border-color: var(--red);
        }

        .btn-danger:hover {
            background: #d63a42;
            border-color: #d63a42;
        }

        .btn-success {
            background: var(--green);
            color: #fff;
            border-color: var(--green);
        }

        .btn-success:hover {
            background: #33a045;
            border-color: #33a045;
        }

        .btn-small {
            padding: 5px 12px;
            font-size: 11px;
            border-radius: 8px;
        }

        .btn-outline {
            background: transparent;
            border-color: var(--border);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        /* ===== CONTAINER ===== */
        .container {
            max-width: 1200px;
            margin: 32px auto;
            padding: 0 24px;
        }

        /* ===== PAGE HEADER ===== */
        .page-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 28px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .page-header h2 {
            font-size: 22px;
            font-weight: 600;
            letter-spacing: -0.3px;
        }

        .page-header .subtitle {
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 400;
        }

        /* ===== STATS GRID ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 18px;
            margin-bottom: 36px;
        }

        .stat-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 22px 20px 20px;
            text-align: left;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }

        .stat-card:hover {
            border-color: var(--text-muted);
            transform: translateY(-3px);
            box-shadow: var(--shadow);
            background: var(--card-hover);
        }

        .stat-card .stat-icon {
            font-size: 22px;
            margin-bottom: 6px;
            display: block;
        }

        .stat-card .stat-number {
            font-size: 34px;
            font-weight: 700;
            color: var(--blue);
            line-height: 1.2;
        }

        .stat-card .stat-label {
            color: var(--text-muted);
            margin-top: 4px;
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            font-weight: 600;
        }

        .stat-card .stat-trend {
            font-size: 12px;
            margin-top: 8px;
            display: inline-block;
            padding: 2px 10px;
            border-radius: 20px;
            background: rgba(63, 185, 80, 0.12);
            color: var(--green);
        }

        .stat-card .stat-trend.down {
            background: rgba(248, 81, 73, 0.12);
            color: var(--red);
        }

        /* Card accent lines */
        .stat-card::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--blue);
            border-radius: var(--radius) var(--radius) 0 0;
        }

        .stat-card:nth-child(2)::after { background: var(--green); }
        .stat-card:nth-child(3)::after { background: var(--red); }

        /* ===== TABLE WRAPPER ===== */
        .table-wrapper {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
        }

        .table-header {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            background: rgba(255, 255, 255, 0.02);
        }

        .table-header h3 {
            font-size: 15px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .table-header .table-actions {
            display: flex;
            gap: 6px;
        }

        /* ===== TABLE ===== */
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 13px;
        }

        th {
            background: rgba(255, 255, 255, 0.03);
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            font-size: 11px;
            border-bottom: 1px solid var(--border);
        }

        td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            vertical-align: middle;
        }

        tr:last-child td {
            border-bottom: none;
        }

        tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }

        /* ===== BADGES ===== */
        .badge {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: 11px;
            font-weight: 600;
            text-transform: capitalize;
            letter-spacing: 0.3px;
        }

        .badge-active {
            background: rgba(63, 185, 80, 0.15);
            color: var(--green);
        }

        .badge-expired {
            background: rgba(248, 81, 73, 0.15);
            color: var(--red);
        }

        .badge-revoked,
        .badge-suspended {
            background: rgba(210, 153, 34, 0.15);
            color: var(--yellow);
        }

        .badge-pending {
            background: rgba(88, 166, 255, 0.12);
            color: var(--blue);
        }

        /* ===== CODE ===== */
        code {
            background: rgba(255, 255, 255, 0.06);
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 12px;
            font-family: 'JetBrains Mono', 'Fira Code', monospace;
            color: var(--blue);
            letter-spacing: 0.2px;
        }

        /* ===== ACTIONS ===== */
        .actions {
            display: flex;
            gap: 4px;
            flex-wrap: wrap;
        }

        /* ===== EMPTY STATE ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            color: var(--text-muted);
        }

        .empty-state .empty-icon {
            font-size: 40px;
            display: block;
            margin-bottom: 12px;
        }

        .empty-state a {
            color: var(--blue);
            text-decoration: none;
            font-weight: 500;
        }

        .empty-state a:hover {
            text-decoration: underline;
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 768px) {
            .admin-nav {
                padding: 12px 16px;
            }

            .admin-nav h1 {
                font-size: 17px;
            }

            .container {
                padding: 0 12px;
                margin: 20px auto;
            }

            .stats-grid {
                grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
                gap: 12px;
            }

            .stat-card .stat-number {
                font-size: 26px;
            }

            .table-header {
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
            }

            .table-header .table-actions {
                justify-content: flex-start;
            }

            table {
                font-size: 11px;
            }

            th,
            td {
                padding: 8px 10px;
            }

            .actions {
                flex-direction: column;
                gap: 4px;
            }

            .btn-small {
                padding: 4px 8px;
                font-size: 10px;
                text-align: center;
            }

            .page-header {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
        }

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

            .admin-nav .nav-links .btn {
                font-size: 12px;
                padding: 6px 12px;
            }

            .stat-card {
                padding: 16px 14px;
            }

            .stat-card .stat-number {
                font-size: 22px;
            }
        }