* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            min-height: 100vh;
            padding: 20px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
        }

        .header {
            text-align: center;
            margin-bottom: 40px;
            color: white;
        }

        .header h1 {
            font-size: 3em;
            margin-bottom: 10px;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
        }

        .header p {
            font-size: 1.2em;
            opacity: 0.9;
        }

        .input-section {
            background: white;
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            margin-bottom: 30px;
            backdrop-filter: blur(10px);
        }

        .url-input {
            display: flex;
            gap: 15px;
            margin-bottom: 20px;
        }

        input[type="url"] {
            flex: 1;
            padding: 15px 20px;
            border: 2px solid #e1e5e9;
            border-radius: 12px;
            font-size: 16px;
            transition: all 0.3s ease;
        }

        input[type="url"]:focus {
            outline: none;
            border-color: #667eea;
            box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
        }

        .scan-btn {
            background: linear-gradient(45deg, #667eea, #764ba2);
            color: white;
            border: none;
            padding: 15px 30px;
            border-radius: 12px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .scan-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(102, 126, 234, 0.3);
        }

        .scan-btn:disabled {
            opacity: 0.7;
            cursor: not-allowed;
            transform: none;
        }

        .loading {
            display: none;
            text-align: center;
            padding: 30px;
            background: white;
            border-radius: 15px;
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }

        .loading.active {
            display: block;
        }

        .spinner {
            border: 4px solid #f3f3f3;
            border-top: 4px solid #667eea;
            border-radius: 50%;
            width: 50px;
            height: 50px;
            animation: spin 1s linear infinite;
            margin: 0 auto 20px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .results {
            display: none;
            background: white;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
        }

        .results.active {
            display: block;
        }

        .score-header {
            background: linear-gradient(135deg, #667eea, #764ba2);
            color: white;
            padding: 30px;
            text-align: center;
        }

        .overall-score {
            font-size: 4em;
            font-weight: bold;
            margin-bottom: 10px;
        }

        .score-label {
            font-size: 1.2em;
            opacity: 0.9;
        }

        .issues-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 25px;
            padding: 30px;
        }

        .issue-card {
            border: 1px solid #e1e5e9;
            border-radius: 15px;
            overflow: hidden;
            transition: all 0.3s ease;
        }

        .issue-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.1);
        }

        .issue-header {
            padding: 20px;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .issue-header.critical {
            background: #fee;
            color: #c53030;
        }

        .issue-header.warning {
            background: #fffbeb;
            color: #d69e2e;
        }

        .issue-header.good {
            background: #f0fff4;
            color: #38a169;
        }

        .issue-body {
            padding: 20px;
            border-top: 1px solid #e1e5e9;
        }

        .issue-description {
            color: #666;
            margin-bottom: 15px;
            line-height: 1.6;
        }

        .guidance {
            background: #f7fafc;
            border-left: 4px solid #667eea;
            padding: 15px;
            border-radius: 0 8px 8px 0;
            font-style: italic;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }

        .stat-card {
            background: rgba(255,255,255,0.1);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.2);
            border-radius: 15px;
            padding: 20px;
            text-align: center;
            color: white;
        }

        .stat-number {
            font-size: 2.5em;
            font-weight: bold;
            margin-bottom: 5px;
        }

        .stat-label {
            opacity: 0.9;
        }

        .error-message {
            background: #fee;
            border: 1px solid #fed7d7;
            color: #c53030;
            padding: 15px;
            border-radius: 8px;
            margin-bottom: 20px;
            display: none;
        }

        .error-message.active {
            display: block;
        }

        /* Report link card styles */
        .issue-card.report-link {
            border: 2px solid #38a169;
            background: linear-gradient(135deg, #f0fff4 0%, #e6fffa 100%);
        }

        .issue-card.report-link .issue-header {
            background: linear-gradient(45deg, #38a169, #319795);
            color: white;
        }

        .issue-card.report-link .guidance a {
            word-break: break-all;
            font-family: monospace;
            font-size: 0.9em;
            background: rgba(102, 126, 234, 0.1);
            padding: 2px 6px;
            border-radius: 4px;
        }

        .issue-card.report-link .guidance a:hover {
            background: rgba(102, 126, 234, 0.2);
        }
        
        @media (max-width: 768px) {
            .header h1 {
                font-size: 2em;
            }
            
            .url-input {
                flex-direction: column;
            }
            
            .issues-grid {
                grid-template-columns: 1fr;
                padding: 20px;
            }
            
            .overall-score {
                font-size: 3em;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .issue-card.report-link .guidance a {
                word-break: break-all;
                font-size: 0.8em;
            }
        }