:root {
            --primary: #4f46e5;
            --success: #059669;
            --text: #1e293b;
            --bg: #f8fafc;
            --white: #ffffff;
            --gray: #6b7280;
            --border: #e2e8f0;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body {
            font-family: 'Inter', sans-serif;
            background: #e2e8f0;
            min-height: 100vh;
            display: flex; justify-content: center; align-items: center;
            padding: 20px;
        }
        .container { width: 100%; max-width: 800px; }
        .report-container {
            background: var(--white);
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.1);
            overflow: hidden;
        }
        header {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 30px 25px;
            text-align: center;
        }
        h1 { font-size: 2rem; margin: 0 0 12px 0; font-weight: 800; }
        p { color: rgba(255,255,255,0.9); margin: 0; font-size: 1.1rem; line-height: 1.5; }
        form { padding: 25px; display: flex; flex-direction: column; gap: 20px; }
        input[type="text"] {
            width: 100%; padding: 16px 20px; border: 2px solid var(--border);
            border-radius: 10px; font-size: 1.1rem; outline: none;
            background-color: var(--white); color: var(--text);
            transition: border-color 0.3s, box-shadow 0.3s;
        }
        input[type="text"]:focus {
            border-color: var(--primary); box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.2);
        }
        button[type="submit"] {
            background: var(--primary); color: var(--white); border: none;
            padding: 16px 0; border-radius: 10px; font-size: 1.1rem;
            font-weight: 600; cursor: pointer; transition: background 0.3s, transform 0.2s;
        }
        button[type="submit"]:hover { background: #4338ca; transform: translateY(-2px); }
        button[type="submit"]:active { transform: translateY(0); }
        .error {
            margin: 20px 25px; padding: 16px; background: #fee2e2;
            border-left: 4px solid #dc2626; color: #b91c1c;
            border-radius: 6px; font-size: 1rem; line-height: 1.6;
        }
        .loading {
            text-align: center; padding: 40px 0;
            display: none;
        }
        .spinner {
            width: 40px; height: 40px; margin: 0 auto 15px;
            border: 4px solid rgba(79, 70, 229, 0.2);
            border-top-color: var(--primary); border-radius: 50%;
            animation: spin 1s linear infinite;
        }
        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }
        .result {
            padding: 25px; background-color: var(--bg);
            border-top: 1px solid var(--border);
        }
        .result h3 {
            margin: 0 0 16px 0; color: var(--text);
            font-size: 1.25rem; font-weight: 600;
        }
        pre {
            background: #1a1a1a; color: #e5e7eb; padding: 16px;
            border-radius: 8px; overflow-y: auto; max-height: 300px;
            font-family: 'Courier New', monospace; margin: 12px 0;
                        white-space: pre-wrap; word-break: break-word;
            font-size: 0.9rem; line-height: 1.6; resize: vertical;
        }
        .disallow-section {
            margin: 20px 0;
        }
        .disallow-label {
            display: block; margin-bottom: 8px; font-weight: 600; color: var(--text);
        }
        .disallow-options {
            display: flex; flex-wrap: wrap; gap: 10px;
        }
        .disallow-option {
            display: inline-flex; align-items: center; gap: 6px;
            padding: 8px 12px; background: var(--bg); border-radius: 6px;
            cursor: pointer; transition: background 0.2s;
        }
        .disallow-option:hover {
            background: var(--white);
        }
        .disallow-option input {
            margin: 0;
        }
        .button-group {
            display: flex; flex-wrap: wrap; justify-content: center;
            gap: 16px; padding: 20px 0 15px;
        }
        .btn {
            padding: 14px 28px; border: none; border-radius: 8px;
            cursor: pointer; font-weight: 600; text-decoration: none;
            display: inline-block; color: white; font-size: 1rem;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .btn-download-sitemap { background: var(--success); }
        .btn-download-robots { background: var(--primary); }
        .btn:hover { 
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.18);
        }
        .footer { text-align: center; padding: 20px; color: var(--gray); font-size: 0.9rem; }