:root {
            --bg: #060a0f;
            --panel-bg: #0f1620;
            --accent: #00f2ff;
            --accent-soft: rgba(0, 242, 255, 0.15);
            --text-primary: #ffffff;
            --text-secondary: #9ca3af;
            --text-muted: #6b7280;
        }

        * {
            box-sizing: border-box;
        }

        body {
            margin: 0;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            background: var(--bg);
            font-family: 'Poppins', sans-serif;
            color: var(--text-secondary);
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            background-image:
                linear-gradient(rgba(0, 255, 255, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 255, 255, 0.025) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }

        /* ---------- Header ---------- */
        .page-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.5rem 2.5rem;
            border-bottom: 1px solid rgba(0, 242, 255, 0.12);
            position: relative;
            z-index: 1;
        }

        .return-link {
            font-size: 0.85rem;
            color: var(--text-secondary);
            text-decoration: none;
            transition: color 0.25s ease, transform 0.25s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }

        .return-link:hover {
            color: var(--text-primary);
            transform: translateX(-3px);
        }

        .header-title {
            font-family: 'JetBrains Mono', monospace;
            font-size: 0.75rem;
            letter-spacing: 2px;
            color: var(--accent);
        }

        /* ---------- Main ---------- */
        .main-content {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 3rem 1.5rem;
            position: relative;
            z-index: 1;
        }

        .cyber-panel {
            width: 100%;
            max-width: 62rem;
            background: var(--panel-bg);
            border: 1px solid rgba(0, 255, 255, 0.15);
            box-shadow: 0 40px 120px rgba(0, 0, 0, 0.85);
            border-radius: 0.75rem;
            padding: 2.75rem;
            transition: border-color 0.35s ease, box-shadow 0.35s ease, transform 0.35s ease;
        }

        .cyber-panel:hover {
            border-color: rgba(0, 255, 255, 0.4);
            box-shadow: 0 50px 140px rgba(0, 0, 0, 0.95), 0 0 40px rgba(0, 242, 255, 0.08);
        }

        .module-label {
            font-family: 'JetBrains Mono', monospace;
            font-size: 11px;
            letter-spacing: 2px;
            color: var(--text-muted);
            margin: 0;
        }

        .cert-title {
            font-size: 1.85rem;
            color: var(--text-primary);
            margin: 0.75rem 0 0;
            line-height: 1.35;
            font-weight: 600;
        }

        .divider {
            height: 1px;
            margin: 2.25rem 0;
            background: linear-gradient(to right, transparent, var(--accent), transparent);
        }

        .cert-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .cert-image-box {
            background: #000;
            border: 1px solid rgba(0, 255, 255, 0.15);
            padding: 1.25rem;
            border-radius: 0.6rem;
            overflow: hidden;
            position: relative;
        }

        .cert-image-box img {
            width: 100%;
            display: block;
            object-fit: contain;
            max-height: 420px;
            transition: transform 0.4s ease;
        }

        .cert-image-box:hover img {
            transform: scale(1.02);
        }

        .status-row {
            margin-bottom: 1.75rem;
        }

        .status-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent-soft);
            border: 1px solid var(--accent);
            color: var(--accent);
            font-family: 'JetBrains Mono', monospace;
            font-size: 12px;
            letter-spacing: 1px;
            padding: 5px 12px;
            border-radius: 3px;
            margin-top: 0.5rem;
        }

        .status-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 6px var(--accent);
            animation: pulse-dot 1.8s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.35; }
        }

        .detail-block {
            margin-bottom: 1.75rem;
        }

        .detail-value {
            color: #d1d5db;
            margin: 0.5rem 0 0;
        }

        .summary-text {
            color: var(--text-secondary);
            margin: 0.65rem 0 0;
            font-size: 0.9rem;
            line-height: 1.65;
        }

        .action-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 2rem;
        }

        .btn-cyber {
            border: 1px solid var(--accent);
            padding: 9px 22px;
            font-size: 13px;
            font-family: 'JetBrains Mono', monospace;
            letter-spacing: 0.5px;
            border-radius: 0.4rem;
            color: var(--text-secondary);
            text-decoration: none;
            transition: 0.3s ease;
            white-space: nowrap;
        }

        .btn-cyber:hover {
            background: var(--accent);
            color: #000;
            box-shadow: 0 0 25px var(--accent);
        }

        .page-footer {
            text-align: center;
            padding: 1.25rem;
            border-top: 1px solid rgba(0, 242, 255, 0.12);
            font-size: 0.75rem;
            color: #4b5563;
            position: relative;
            z-index: 1;
        }

        /* ---------- Responsive ---------- */
        @media (max-width: 860px) {
            .cert-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }

            .cyber-panel {
                padding: 1.75rem;
            }

            .cert-title {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 480px) {
            .page-header {
                padding: 1.25rem;
            }

            .action-buttons {
                flex-direction: column;
            }

            .btn-cyber {
                text-align: center;
            }
        }

        a:focus-visible,
        .btn-cyber:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }

        @media (prefers-reduced-motion: reduce) {
            *, *::before, *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }