:root {
            --color-bg: #0f1419;
            --color-surface: #1a1f26;
            --color-border: #2d3748;
            --color-text: #e2e8f0;
            --color-text-secondary: #a0aec0;
            --color-accent: #48bb78;
            --color-accent-hover: #38a169;
            --color-error: #f56565;
            --color-warning: #ed8936;
            --muted: #718096;
            --spacing: 16px;
        }

        * {
            box-sizing: border-box;
        }

        html, body {
            margin: 0;
            padding: 0;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background-color: var(--color-bg);
            color: var(--color-text);
            line-height: 1.6;
        }

        body {
            padding: var(--spacing);
        }

        .container {
            max-width: 900px;
            margin: 0 auto;
        }

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 40px;
            padding-bottom: 24px;
            border-bottom: 1px solid var(--color-border);
        }

        header > div {
            flex: 1;
            text-align: center;
        }

        h1 {
            margin: 0 0 8px 0;
            font-size: 28px;
            font-weight: 600;
        }

        .subtitle {
            color: var(--color-text-secondary);
            font-size: 14px;
            margin: 0;
        }

            
        .grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 24px;
            margin-bottom: 40px;
        }

        @media (min-width: 768px) {
            .grid {
                grid-template-columns: 1fr 1fr;
            }
            
            .console-section {
                grid-column: 1 / -1;
            }
        }

        .card {
            background-color: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 8px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .card h3 {
            margin: 0;
            font-size: 18px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .card-number {
            background: var(--color-accent);
            color: var(--color-bg);
            width: 28px;
            height: 28px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: bold;
        }

        .description {
            color: var(--muted);
            font-size: 13px;
            margin: 0;
        }

        label {
            display: block;
            font-size: 13px;
            font-weight: 500;
            color: var(--color-text);
            margin-bottom: 6px;
        }

        input[type="number"],
        input[type="text"] {
            width: 100%;
            padding: 10px 12px;
            background-color: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--color-border);
            border-radius: 6px;
            color: var(--color-text);
            font-size: 14px;
            transition: border-color 0.2s;
        }

        input[type="number"]:focus,
        input[type="text"]:focus {
            outline: none;
            border-color: var(--color-accent);
        }

        input::placeholder {
            color: var(--muted);
        }

        .row {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }

        .btn {
            padding: 10px 16px;
            background-color: var(--color-accent);
            color: var(--color-bg);
            border: none;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background-color 0.2s;
            white-space: nowrap;
        }

        .btn:hover {
            background-color: var(--color-accent-hover);
        }

        .btn:active {
            transform: scale(0.98);
        }

        .btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .btn.secondary {
            background-color: rgba(72, 187, 120, 0.15);
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
        }

        .btn.secondary:hover {
            background-color: rgba(72, 187, 120, 0.25);
        }

        .status {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 13px;
            font-weight: 500;
        }

        .status.success {
            background-color: rgba(72, 187, 120, 0.15);
            color: var(--color-accent);
            border: 1px solid var(--color-accent);
        }

        .status.error {
            background-color: rgba(245, 101, 101, 0.15);
            color: var(--color-error);
            border: 1px solid var(--color-error);
        }

        .status.loading {
            background-color: rgba(237, 137, 54, 0.15);
            color: var(--color-warning);
            border: 1px solid var(--color-warning);
        }

        .result {
            background-color: rgba(72, 187, 120, 0.1);
            border: 1px solid var(--color-accent);
            border-radius: 6px;
            padding: 12px;
            font-size: 13px;
        }

        .result-label {
            font-weight: 600;
            color: var(--color-accent);
            margin-bottom: 4px;
        }

        .result-value {
            color: var(--color-text-secondary);
            word-break: break-all;
            font-family: 'Courier New', monospace;
            font-size: 12px;
        }

        pre {
            background-color: rgba(0, 0, 0, 0.3);
            border: 1px solid var(--color-border);
            border-radius: 6px;
            padding: 12px;
            overflow-x: auto;
            font-size: 12px;
            color: var(--color-text-secondary);
            margin: 0;
            font-family: 'Courier New', monospace;
            line-height: 1.4;
            max-height: 200px;
            overflow-y: auto;
        }

        .console-section {
            background-color: var(--color-surface);
            border: 1px solid var(--color-border);
            border-radius: 8px;
            padding: 24px;
        }

        .console-section h3 {
            margin: 0 0 8px 0;
            font-size: 18px;
            font-weight: 600;
        }

        #devLog {
            background-color: rgba(0, 0, 0, 0.5);
            max-height: 300px;
            overflow-y: auto;
            word-wrap: break-word;
            white-space: pre-wrap;
        }

        footer {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid var(--color-border);
            color: var(--muted);
            font-size: 12px;
        }

        footer a {
            color: var(--color-accent);
            text-decoration: none;
        }

        footer a:hover {
            text-decoration: underline;
        }

        .hidden {
            display: none !important;
        }

        .section-divider {
            height: 1px;
            background-color: var(--color-border);
            margin: 32px 0;
        }