.container {
            max-width: 1400px;
            margin: 0 auto;
        }

        /* h1 {
            text-align: center;
            color: white;
            margin-bottom: 30px;
            font-size: 2.5em;
            text-shadow: 2px 2px 4px rgba(0,0,0,0.2);
        } */

        .main-content {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 20px;
        }

        .panel {
            background: white;
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
        }

        .full-width {
            grid-column: 1 / -1;
        }
/* 
        h2 {
            color: #667eea;
            margin-bottom: 20px;
            font-size: 1.4em;
            border-bottom: 3px solid #667eea;
            padding-bottom: 10px;
        }

        h3 {
            color: #764ba2;
            margin: 20px 0 15px 0;
            font-size: 1.1em;
        } */

        .info-box {
            background: #e3f2fd;
            border-left: 4px solid #2196f3;
            padding: 12px;
            margin-bottom: 15px;
            border-radius: 4px;
            font-size: 13px;
            color: #1565c0;
        }

        textarea {
            width: 100%;
            min-height: 400px;
            padding: 20px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 16px;
            line-height: 1.8;
            resize: vertical;
            font-family: inherit;
            transition: border-color 0.3s;
        }

        textarea:focus {
            outline: none;
            border-color: #667eea;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 15px;
            margin-bottom: 20px;
        }

        .stat-box {
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 20px;
            border-radius: 8px;
            text-align: center;
            transition: transform 0.3s;
        }

        .stat-box:hover {
            transform: translateY(-5px);
        }

        .stat-value {
            font-size: 32px;
            font-weight: bold;
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 12px;
            opacity: 0.9;
        }

        .stat-box.highlight {
            background: linear-gradient(135deg, #28a745 0%, #20c997 100%);
        }

        .stat-box.warning {
            background: linear-gradient(135deg, #ff9800 0%, #ff5722 100%);
        }

        .detailed-stats {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 20px;
            margin-bottom: 20px;
        }

        .stat-row {
            display: flex;
            justify-content: space-between;
            padding: 10px 0;
            border-bottom: 1px solid #e0e0e0;
        }

        .stat-row:last-child {
            border-bottom: none;
        }

        .stat-row-label {
            font-weight: 600;
            color: #333;
        }

        .stat-row-value {
            color: #667eea;
            font-weight: bold;
        }

        .seo-section {
            background: #fff3e0;
            border-left: 4px solid #ff9800;
            padding: 15px;
            border-radius: 4px;
            margin-bottom: 15px;
        }

        .seo-title {
            font-weight: 600;
            color: #e65100;
            margin-bottom: 10px;
            font-size: 14px;
        }

        .seo-items {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .seo-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 13px;
        }

        .seo-status {
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: 600;
        }

        .status-good {
            background: #e8f5e9;
            color: #2e7d32;
        }

        .status-warning {
            background: #fff3e0;
            color: #e65100;
        }

        .status-bad {
            background: #ffebee;
            color: #c62828;
        }

        .button-group {
            display: flex;
            gap: 10px;
            margin-top: 15px;
            flex-wrap: wrap;
        }

        button {
            padding: 10px 20px;
            background: #667eea;
            color: white;
            border: none;
            border-radius: 6px;
            cursor: pointer;
            font-size: 14px;
            font-weight: 600;
            transition: all 0.3s;
        }

        button:hover {
            background: #5568d3;
            transform: translateY(-2px);
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
        }

        button.secondary {
            background: #764ba2;
        }

        button.secondary:hover {
            background: #653a8a;
        }

        .file-input-wrapper {
            margin-bottom: 15px;
        }

        .file-input-label {
            display: inline-block;
            padding: 10px 20px;
            background: #667eea;
            color: white;
            border-radius: 6px;
            cursor: pointer;
            transition: background 0.3s;
            font-size: 14px;
        }

        .file-input-label:hover {
            background: #5568d3;
        }

        input[type="file"] {
            display: none;
        }

        .file-name {
            display: inline-block;
            margin-left: 15px;
            color: #666;
            font-size: 14px;
        }

        .keyword-density {
            background: #f8f9fa;
            border-radius: 8px;
            padding: 15px;
            margin-top: 15px;
        }

        .keyword-item {
            display: flex;
            justify-content: space-between;
            padding: 8px 0;
            border-bottom: 1px solid #e0e0e0;
            font-size: 14px;
        }

        .keyword-item:last-child {
            border-bottom: none;
        }

        .keyword-word {
            font-weight: 600;
            color: #333;
        }

        .keyword-count {
            color: #667eea;
        }

        .progress-bar {
            width: 100%;
            height: 8px;
            background: #e0e0e0;
            border-radius: 4px;
            overflow: hidden;
            margin: 10px 0;
        }

        .progress-fill {
            height: 100%;
            background: linear-gradient(90deg, #667eea 0%, #764ba2 100%);
            transition: width 0.3s;
        }

        .reading-time-details {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 10px;
            margin-top: 10px;
        }

        .time-box {
            background: white;
            padding: 10px;
            border-radius: 6px;
            text-align: center;
            border: 2px solid #e0e0e0;
        }

        .time-value {
            font-size: 20px;
            font-weight: bold;
            color: #667eea;
        }

        .time-label {
            font-size: 11px;
            color: #666;
            margin-top: 4px;
        }

        @media (max-width: 992px) {
            .main-content {
                grid-template-columns: 1fr;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .reading-time-details {
                grid-template-columns: 1fr;
            }
        }