:root {
            --primary-color: #2c7da0;
            --secondary-color: #a9d6e5;
            --accent-color: #01497c;
            --light-gray: #f8f9fa;
            --border-color: #eaeaea;
            --text-color: #333;
            --text-muted: #6c757d;
            --success-color: #28a745;
            --warning-color: #ffc107;
            --cmyk-color: #008080;
            --rgb-color: #e83e8c;
            --hex-color: #6f42c1;
        }
       .page-header {
            background: linear-gradient(135deg, rgba(169, 214, 229, 0.4) 0%, rgba(44, 125, 160, 0.4) 100%);
            padding: 1.5rem 0;
            margin-bottom: 2rem;
            border-bottom: 1px solid rgba(44, 125, 160, 0.2);
            position: relative;
            overflow: hidden; color: var(--text-color);
        }
        .breadcrumb {
            background-color: transparent;
            padding: 0.5rem 0;
            margin-bottom: 0.5rem;
        }
        .breadcrumb-item a {
            color: var(--text-muted);
            text-decoration: none;
        }
        .breadcrumb-item.active {
            color: var(--text-color);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(44, 125, 160, 0.15);
        }
        .color-input-group {
            display: flex;
            align-items: center;
            margin-bottom: 1rem;
        }
        .color-label {
            width: 80px;
            font-weight: 600;
            text-transform: uppercase;
        }
        .cmyk-label { color: var(--cmyk-color); }
        .rgb-label { color: var(--rgb-color); }
        .hex-label { color: var(--hex-color); }
        .color-slider-container {
            flex: 1;
            margin-left: 1rem;
        }
        .color-value-display {
            width: 70px;
            text-align: center;
            font-weight: 600;
            font-family: 'Courier New', monospace;
            margin-left: 1rem;
        }
        .color-preview {
            width: 40px;
            height: 40px;
            border-radius: 6px;
            border: 1px solid #ddd;
            margin-left: 1rem;
        }
        input[type="range"] {
            width: 100%;
            height: 8px;
            border-radius: 4px;
            background: #ddd;
            outline: none;
            -webkit-appearance: none;
        }
        input[type="range"].cmyk-c {
            background: linear-gradient(to right, #00ffff, #ffffff);
        }
        input[type="range"].cmyk-m {
            background: linear-gradient(to right, #ff00ff, #ffffff);
        }
        input[type="range"].cmyk-y {
            background: linear-gradient(to right, #ffff00, #ffffff);
        }
        input[type="range"].cmyk-k {
            background: linear-gradient(to right, #000000, #ffffff);
        }
        input[type="range"].rgb-r {
            background: linear-gradient(to right, #000000, #ff0000);
        }
        input[type="range"].rgb-g {
            background: linear-gradient(to right, #000000, #00ff00);
        }
        input[type="range"].rgb-b {
            background: linear-gradient(to right, #000000, #0000ff);
        }
        .color-display-box {
            width: 100%;
            height: 120px;
            border-radius: 8px;
            margin: 1.5rem 0;
            border: 1px solid #ddd;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }
        .color-display-label {
            background-color: rgba(255, 255, 255, 0.9);
            padding: 0.5rem 1rem;
            border-radius: 4px;
            font-weight: 600;
            text-align: center;
        }
        .color-display-cmyk {
            background: linear-gradient(135deg, rgba(0, 255, 255, 0.7), rgba(255, 0, 255, 0.7), rgba(255, 255, 0, 0.7), rgba(0, 0, 0, 0.7));
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0.3;
        }
        .color-result {
            padding: 12px;
            background-color: white;
            border-radius: 4px;
            border: 1px solid #eee;
            font-size: 1.1rem;
            margin: 10px 0;
            font-family: 'Courier New', monospace;
        }
        .color-format-box {
            background-color: white;
            border-radius: 8px;
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            margin-bottom: 1.5rem;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        .format-title {
            font-weight: 600;
            margin-bottom: 1rem;
            color: var(--primary-color);
            display: flex;
            align-items: center;
        }
        .format-title i {
            margin-right: 0.5rem;
        }
        .color-value {
            font-size: 1.2rem;
            font-weight: 700;
            font-family: 'Courier New', monospace;
            margin-bottom: 0.5rem;
        }
        .color-desc {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .color-harmony-container {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
            gap: 1rem;
            margin-top: 1rem;
        }
        .harmony-color {
            height: 80px;
            border-radius: 6px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            color: white;
            text-shadow: 0 1px 2px rgba(0,0,0,0.3);
            font-weight: 600;
            position: relative;
            overflow: hidden;
            border: 1px solid rgba(0,0,0,0.1);
        }
        .harmony-color-label {
            font-size: 0.8rem;
            margin-top: 0.25rem;
            background-color: rgba(0,0,0,0.5);
            padding: 2px 8px;
            border-radius: 10px;
        }
        .conversion-table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
        }
        .conversion-table th, .conversion-table td {
            padding: 0.75rem;
            text-align: left;
            border: 1px solid var(--border-color);
        }
        .conversion-table th {
            background-color: var(--light-gray);
            font-weight: 600;
        }
        .conversion-table tr:nth-child(even) {
            background-color: rgba(44, 125, 160, 0.05);
        }
        .cmyk-box {
            background-color: rgba(0, 128, 128, 0.05);
            border-left: 3px solid var(--cmyk-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        .rgb-box {
            background-color: rgba(232, 62, 140, 0.05);
            border-left: 3px solid var(--rgb-color);
            padding: 1rem;
            border-radius: 0 4px 4px 0;
            margin: 1.5rem 0;
        }
        .color-palette {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .palette-color {
            width: 60px;
            height: 60px;
            border-radius: 6px;
            border: 1px solid #ddd;
            cursor: pointer;
            transition: transform 0.2s;
            position: relative;
        }
        .palette-color:hover {
            transform: translateY(-3px);
        }
        .palette-color.active {
            border: 3px solid var(--primary-color);
        }
        .palette-name {
            font-size: 0.8rem;
            text-align: center;
            margin-top: 0.25rem;
            font-weight: 600;
        }
        @media (max-width: 768px) {
            .color-harmony-container {
                grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            }
        }
        .color-presets {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin: 1rem 0;
        }
        .preset-btn {
            background-color: rgba(44, 125, 160, 0.1);
            border: 1px solid rgba(44, 125, 160, 0.2);
            border-radius: 4px;
            padding: 0.5rem 0.75rem;
            font-size: 0.9rem;
            color: var(--primary-color);
            cursor: pointer;
            transition: all 0.2s;
            display: flex;
            align-items: center;
        }
        .preset-btn:hover {
            background-color: rgba(44, 125, 160, 0.2);
            transform: translateY(-2px);
        }
        .preset-color {
            width: 20px;
            height: 20px;
            border-radius: 3px;
            margin-right: 0.5rem;
            border: 1px solid rgba(0,0,0,0.1);
        }
        .copy-btn {
            background-color: transparent;
            border: 1px solid var(--border-color);
            border-radius: 4px;
            padding: 0.25rem 0.5rem;
            font-size: 0.8rem;
            color: var(--text-muted);
            cursor: pointer;
            transition: all 0.2s;
            margin-left: 0.5rem;
        }
        .copy-btn:hover {
            background-color: var(--light-gray);
            color: var(--primary-color);
        }
        .color-input-container {
            position: relative;
        }
        .color-input-container input[type="color"] {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            width: 30px;
            height: 30px;
            border: none;
            border-radius: 4px;
            cursor: pointer;
        }
        .color-wheel {
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: conic-gradient(red, yellow, lime, aqua, blue, magenta, red);
            margin: 1rem auto;
            position: relative;
        }
        .color-wheel-inner {
            position: absolute;
            top: 25%;
            left: 25%;
            width: 50%;
            height: 50%;
            border-radius: 50%;
            background: white;
        }
        .input-mode-toggle {
            display: flex;
            margin-bottom: 1rem;
            border-radius: 6px;
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .mode-btn {
            flex: 1;
            padding: 0.5rem;
            text-align: center;
            background-color: white;
            border: none;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.2s;
        }
        .mode-btn.active {
            background-color: var(--primary-color);
            color: white;
        }
        .accessibility-score {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.5rem;
            border-radius: 4px;
            font-weight: 600;
            font-size: 0.9rem;
        }
        .score-excellent { background-color: rgba(40, 167, 69, 0.2); color: #155724; }
        .score-good { background-color: rgba(255, 193, 7, 0.2); color: #856404; }
        .score-poor { background-color: rgba(220, 53, 69, 0.2); color: #721c24; }