/* Color Preview */
        .color-preview {
            width: 100%;
            height: 120px;
            border-radius: 8px;
            margin-bottom: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
            transition: all 0.3s;
        }
        
        .color-preview:hover {
            transform: scale(1.02);
        }
        
        /* Result Area */
        .result-container {
            background-color: var(--light-gray);
            border-radius: 6px;
            padding: 1.5rem;
            margin-top: 1.5rem;
            position: relative;
            border: 1px solid var(--border-color);
        }
        
        .result-title {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
        }
        
        .result-content {
            font-family: 'Courier New', monospace;
            word-break: break-all;
            padding: 12px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid #eee;
            font-size: 1rem;
            min-height: 60px;
            white-space: pre-wrap;
        }
        
        .copy-btn {
            position: absolute;
            top: 15px;
            right: 15px;
            background: white;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 0.4rem 0.75rem;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .copy-btn:hover {
            background-color: var(--light-gray);
        }
        
        /* Content Sections */
        .section-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-color);
        }
        
        .usage-step {
            display: flex;
            margin-bottom: 1.5rem;
            align-items: flex-start;
        }
        
        .step-number {
            width: 28px;
            height: 28px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            flex-shrink: 0;
            font-weight: 600;
            font-size: 0.9rem;
        }
        
        .info-box {
            background-color: rgba(44, 125, 160, 0.05);
            border-left: 3px solid var(--primary-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        .security-alert {
            background-color: #d4edda;
            border-left: 3px solid #28a745;
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        
        /* Related Tools */
        .related-tools {
            background-color: white;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            padding: 1.5rem;
            margin-bottom: 1.5rem;
        }
        
        .related-title {
            font-weight: 600;
            margin-bottom: 1.25rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid var(--border-color);
            color: var(--primary-color);
        }
        
        .related-tool {
            display: flex;
            align-items: center;
            padding: 0.75rem 0;
            border-bottom: 1px solid var(--border-color);
            transition: background-color 0.3s;
        }
        
        .related-tool:hover {
            background-color: var(--light-gray);
        }
        
        .related-tool:last-child {
            border-bottom: none;
        }
        
        .related-icon {
            width: 36px;
            height: 36px;
            border-radius: 6px;
            background-color: rgba(44, 125, 160, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 1rem;
            color: var(--primary-color);
        }
        
        .related-name {
            font-weight: 500;
            margin-bottom: 0.25rem;
        }
        
        .related-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        /* Ad Container */
        .ad-container {
            background-color: var(--light-gray);
            border-radius: 8px;
            padding: 1.5rem;
            margin-bottom: 1.5rem;
            text-align: center;
            border: 1px solid var(--border-color);
        }
        
        .ad-label {
            font-size: 0.75rem;
            color: var(--text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 0.5rem;
        }
        
        .ad-placeholder {
            width: 100%;
            height: 250px;
            background-color: #f0f4f8;
            border: 1px dashed #dee2e6;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-weight: 500;
        }
        
        /* Footer */
        .footer {
            background-color: var(--light-gray);
            padding: 3rem 0;
            margin-top: 3rem;
        }
        
        /* Color Format Cards */
        .color-format-card {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        
        .format-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .format-description {
            margin-bottom: 1.5rem;
        }
        
        .format-examples {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: 1rem;
        }
        
        .color-example {
            height: 80px;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 600;
            text-shadow: 0 1px 2px rgba(0,0,0,0.3);
            position: relative;
            overflow: hidden;
        }
        
        .color-example::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(to bottom, rgba(255,255,255,0.1), rgba(0,0,0,0.1));
        }
        
        .color-value {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0.5rem;
            background-color: rgba(0,0,0,0.3);
            border-radius: 4px;
            font-size: 0.85rem;
        }
        
        /* Color Theory */
        .color-theory {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        
        .theory-card {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: 0 2px 8px rgba(0,0,0,0.05);
        }
        
        .theory-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .theory-content {
            margin-bottom: 1rem;
        }
        
        .theory-image {
            width: 100%;
            height: 180px;
            background-color: var(--light-gray);
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-weight: 500;
            margin-top: 1rem;
        }
        
        /* Color Harmony */
        .color-harmony {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .harmony-card {
            background-color: white;
            border-radius: 8px;
            padding: 1rem;
            border: 1px solid var(--border-color);
            text-align: center;
        }
        
        .harmony-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
        }
        
        .harmony-colors {
            display: flex;
            height: 100px;
            border-radius: 6px;
            overflow: hidden;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .harmony-color {
            flex: 1;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: 600;
            text-shadow: 0 1px 2px rgba(0,0,0,0.3);
        }
        
        /* Responsive Adjustments */
        @media (max-width: 991px) {
            .tool-container {
                flex-direction: column;
            }
            
            .tool-sidebar {
                width: 100%;
            }
        }
        
        /* Action buttons */
        .action-buttons {
            display: flex;
            gap: 0.75rem;
            justify-content: flex-end;
            margin-top: 1rem;
        }
        
        .action-btn {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.5rem 1rem;
            border-radius: 6px;
            background: white;
            border: 1px solid var(--border-color);
            transition: all 0.3s;
            font-size: 0.9rem;
        }
        
        .action-btn:hover {
            background-color: var(--light-gray);
        }
        
        /* Color converter specific styles */
        .color-converter {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }
        
        @media (max-width: 768px) {
            .color-converter {
                grid-template-columns: 1fr;
            }
        }
        
        .converter-input {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
        }
        
        .converter-output {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
        }
        
        .input-group {
            margin-bottom: 1rem;
        }
        
        .slider-container {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        
        .slider-value {
            min-width: 40px;
            text-align: center;
            font-weight: 600;
        }
        
        .color-history {
            margin-top: 1.5rem;
        }
        
        .history-title {
            font-weight: 600;
            margin-bottom: 0.75rem;
            color: var(--primary-color);
        }
        
        .history-colors {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }
        
        .history-color {
            width: 40px;
            height: 40px;
            border-radius: 6px;
            cursor: pointer;
            border: 1px solid var(--border-color);
            transition: transform 0.3s;
        }
        
        .history-color:hover {
            transform: scale(1.1);
        }
        
        /* Color wheel */
        .color-wheel-container {
            display: flex;
            justify-content: center;
            margin: 1.5rem 0;
        }
        
        .color-wheel {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: conic-gradient(
                #ff0000, #ffff00, #00ff00, #00ffff, #0000ff, #ff00ff, #ff0000
            );
            position: relative;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }
        
        .color-wheel::after {
            content: "";
            position: absolute;
            top: 50%;
            left: 50%;
            width: 80px;
            height: 80px;
            background: white;
            border-radius: 50%;
            transform: translate(-50%, -50%);
        }
        
        /* Color palette */
        .color-palette {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .palette-card {
            background-color: white;
            border-radius: 8px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 8px rgba(0,0,0,0.05);
        }
        
        .palette-colors {
            display: flex;
            height: 100px;
        }
        
        .palette-color {
            flex: 1;
        }
        
        .palette-info {
            padding: 1rem;
        }
        
        .palette-name {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .palette-description {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        
        /* Color psychology */
        .color-psychology {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .psychology-card {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            text-align: center;
        }
        
        .psychology-color {
            width: 60px;
            height: 60px;
            border-radius: 50%;
            margin: 0 auto 1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-weight: bold;
            box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        }
        
        .psychology-title {
            font-weight: 600;
            margin-bottom: 0.5rem;
        }
        
        .psychology-description {
            font-size: 0.9rem;
            color: var(--text-muted);
        }