:root {
            --primary-color: #4361ee;
            --secondary-color: #3f37c9;
            --accent-color: #4895ef;
            --light-color: #f8f9fa;
            --dark-color: #212529;
            --success-color: #4cc9f0;
            --warning-color: #f72585;
            --border-radius: 8px;
            --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            background-color: #f5f7ff;
            color: var(--dark-color);
            line-height: 1.6;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 2rem;
        }

        header {
            text-align: center;
            margin-bottom: 2rem;
        }

        h1 {
            color: var(--primary-color);
            margin-bottom: 0.5rem;
            font-weight: 700;
        }

        .subtitle {
            color: #6c757d;
            font-size: 1.1rem;
            margin-bottom: 1.5rem;
        }

        .app-container {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
        }

        @media (max-width: 768px) {
            .app-container {
                grid-template-columns: 1fr;
            }
        }

        .controls-panel {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            max-height: 90vh;
            overflow-y: auto;
        }

        .preview-panel {
            background-color: white;
            padding: 1.5rem;
            border-radius: var(--border-radius);
            box-shadow: var(--box-shadow);
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .form-group {
            margin-bottom: 1.5rem;
        }

        label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 600;
            color: var(--dark-color);
        }

        input[type="text"],
        input[type="number"],
        input[type="color"],
        select {
            width: 100%;
            padding: 0.75rem;
            border: 1px solid #ced4da;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: var(--transition);
        }

        input[type="text"]:focus,
        input[type="number"]:focus,
        input[type="color"]:focus,
        select:focus {
            outline: none;
            border-color: var(--accent-color);
            box-shadow: 0 0 0 3px rgba(72, 149, 239, 0.25);
        }

        .range-group {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .range-group input[type="range"] {
            flex: 1;
        }

        .range-group span {
            min-width: 40px;
            text-align: center;
        }

        .btn {
            display: inline-block;
            padding: 0.75rem 1.5rem;
            background-color: var(--primary-color);
            color: white;
            border: none;
            border-radius: var(--border-radius);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
            text-align: center;
        }

        .btn:hover {
            background-color: var(--secondary-color);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background-color: #6c757d;
        }

        .btn-secondary:hover {
            background-color: #5a6268;
        }

        .btn-danger {
            background-color: var(--warning-color);
        }

        .btn-danger:hover {
            background-color: #d31665;
        }

        .btn-group {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }

        .btn-icon {
            margin-right: 0.5rem;
        }

        .circle-container {
            position: relative;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background-color: #f8f9fa;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
            border: 2px dashed #ced4da;
        }

        .circle-container svg {
            width: 100%;
            height: 100%;
        }

        .circle-mockup {
            position: absolute;
            width: 80%;
            height: 80%;
            border-radius: 50%;
            background-color: white;
            box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.1);
        }

        .export-options {
            margin-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            justify-content: center;
        }

        .presets {
            margin-top: 1.5rem;
        }

        .preset-buttons {
            display: flex;
            gap: 0.5rem;
            flex-wrap: wrap;
        }

        .preset-btn {
            padding: 0.5rem 1rem;
            background-color: #e9ecef;
            border: none;
            border-radius: 20px;
            cursor: pointer;
            transition: var(--transition);
            font-size: 0.9rem;
        }

        .preset-btn:hover {
            background-color: #dee2e6;
        }

        .divider {
            height: 1px;
            background-color: #e9ecef;
            margin: 1.5rem 0;
        }

        .advanced-options {
            margin-top: 1.5rem;
            padding: 1rem;
            background-color: #f8f9fa;
            border-radius: var(--border-radius);
        }

        .toggle-advanced {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            margin-bottom: 0.5rem;
        }

        .toggle-advanced h3 {
            color: var(--primary-color);
            font-size: 1rem;
        }

        .toggle-advanced i {
            transition: var(--transition);
        }

        .advanced-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .advanced-content.show {
            max-height: 1000px;
        }

        .footer {
            text-align: center;
            margin-top: 3rem;
            color: #6c757d;
            font-size: 0.9rem;
        }

        /* Tooltip styles */
        .tooltip {
            position: relative;
            display: inline-block;
            margin-left: 0.5rem;
            cursor: pointer;
        }

        .tooltip .tooltiptext {
            visibility: hidden;
            width: 200px;
            background-color: #333;
            color: #fff;
            text-align: center;
            border-radius: 6px;
            padding: 0.5rem;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            transform: translateX(-50%);
            opacity: 0;
            transition: opacity 0.3s;
            font-size: 0.8rem;
            font-weight: normal;
        }

        .tooltip:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }

        /* Toggle switch */
        .switch {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }

        .switch input {
            opacity: 0;
            width: 0;
            height: 0;
        }

        .slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: #ccc;
            transition: .4s;
            border-radius: 24px;
        }

        .slider:before {
            position: absolute;
            content: "";
            height: 16px;
            width: 16px;
            left: 4px;
            bottom: 4px;
            background-color: white;
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .slider {
            background-color: var(--primary-color);
        }

        input:checked + .slider:before {
            transform: translateX(26px);
        }

        .switch-container {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .switch-label {
            margin-bottom: 0;
        }

        /* Responsive adjustments */
        @media (max-width: 576px) {
            .container {
                padding: 1rem;
            }
            
            .btn-group {
                flex-direction: column;
            }
            
            .circle-container {
                width: 250px;
                height: 250px;
            }
        }

        /* Custom font loader */
        .custom-font-input {
            display: none;
        }

        .font-preview {
            margin-top: 10px;
            padding: 10px;
            border: 1px dashed #ccc;
            border-radius: var(--border-radius);
            display: none;
        }

        /* Gradient controls */
        .gradient-controls {
            display: none;
            margin-top: 10px;
            padding: 10px;
            background-color: #f0f0f0;
            border-radius: var(--border-radius);
        }

        .gradient-stop {
            display: flex;
            align-items: center;
            margin-bottom: 10px;
        }

        .gradient-stop input[type="color"] {
            width: 40px;
            height: 40px;
            padding: 2px;
        }

        .gradient-stop input[type="range"] {
            flex: 1;
            margin: 0 10px;
        }

        .gradient-stop button {
            background-color: var(--warning-color);
            color: white;
            border: none;
            border-radius: 4px;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        .add-gradient-stop {
            margin-top: 10px;
        }

        /* Shape selector */
        .shape-selector {
            display: flex;
            gap: 10px;
            margin-top: 10px;
        }

        .shape-option {
            width: 40px;
            height: 40px;
            border: 2px solid #ddd;
            border-radius: 4px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s;
        }

        .shape-option:hover {
            border-color: var(--accent-color);
        }

        .shape-option.active {
            border-color: var(--primary-color);
            background-color: #e6f0ff;
        }

        /* Text effect options */
        .text-effect-options {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 10px;
        }

        .text-effect-btn {
            padding: 5px 10px;
            background-color: #e9ecef;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.2s;
        }

        .text-effect-btn:hover {
            background-color: #dee2e6;
        }

        .text-effect-btn.active {
            background-color: var(--primary-color);
            color: white;
        }