:root {
            --primary-bg: #0a0a0a;
            --secondary-bg: #1a1a1a;
            --glass-bg: rgba(255, 255, 255, 0.1);
            --glass-border: rgba(255, 255, 255, 0.2);
            --text-primary: #ffffff;
            --text-secondary: #a0a0a0;
            --accent-neon: #00f2fe;
            --accent-magenta: #f093fb;
            --accent-cyan: #4facfe;
            --accent-yellow: #ffd700;
            --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
            --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
            --gradient-4: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
            --gradient-5: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
        }

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

        body {
            font-family: 'Inter', sans-serif;
            background: var(--primary-bg);
            color: var(--text-primary);
            min-height: 100vh;
            overflow-x: hidden;
        }

        /* Header */
        .header {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--glass-border);
            padding: 1rem 2rem;
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1400px;
            margin: 0 auto;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-family: 'Poppins', sans-serif;
            font-weight: 700;
            font-size: 1.5rem;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .main-container {
            display: grid;
            grid-template-columns: 300px 1fr 300px;
            gap: 2rem;
            max-width: 1400px;
            margin: 2rem auto;
            padding: 0 2rem;
        }

        /* Panel lateral */
        .control-panel {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            padding: 2rem;
            height: fit-content;
            position: sticky;
            top: 120px;
        }

        .panel-title {
            font-family: 'Poppins', sans-serif;
            font-weight: 600;
            font-size: 1.2rem;
            margin-bottom: 1.5rem;
            color: var(--accent-neon);
        }

        /* Selectores de tema */
        .theme-selector {
            margin-bottom: 2rem;
        }

        .theme-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 0.5rem;
        }

        .theme-button {
            background: var(--secondary-bg);
            border: 2px solid transparent;
            border-radius: 12px;
            padding: 0.8rem;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            text-align: center;
            font-size: 0.8rem;
            font-weight: 500;
        }

        .theme-button:hover {
            border-color: var(--accent-neon);
            transform: translateY(-2px);
        }

        .theme-button.active {
            border-color: var(--accent-magenta);
            background: var(--gradient-1);
        }

        /* Controles de color */
        .color-controls {
            margin-bottom: 2rem;
        }

        .color-picker-container {
            position: relative;
            margin-bottom: 1rem;
        }

        .color-picker {
            width: 100%;
            height: 40px;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            background: var(--secondary-bg);
        }

        .preset-colors {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 0.5rem;
            margin-top: 1rem;
        }

        .preset-color {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            border: 2px solid var(--glass-border);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .preset-color:hover {
            transform: scale(1.1);
            border-color: var(--text-primary);
        }

        /* Controles avanzados */
        .advanced-controls {
            margin-bottom: 2rem;
        }

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

        .control-label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .slider {
            width: 100%;
            height: 6px;
            border-radius: 3px;
            background: var(--secondary-bg);
            outline: none;
            -webkit-appearance: none;
        }

        .slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--gradient-1);
            cursor: pointer;
            border: 2px solid var(--text-primary);
        }

        .slider::-moz-range-thumb {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background: var(--gradient-1);
            cursor: pointer;
            border: 2px solid var(--text-primary);
        }

        .toggle {
            position: relative;
            display: inline-block;
            width: 50px;
            height: 24px;
        }

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

        .toggle-slider {
            position: absolute;
            cursor: pointer;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-color: var(--secondary-bg);
            transition: .4s;
            border-radius: 24px;
        }

        .toggle-slider:before {
            position: absolute;
            content: "";
            height: 18px;
            width: 18px;
            left: 3px;
            bottom: 3px;
            background-color: var(--text-primary);
            transition: .4s;
            border-radius: 50%;
        }

        input:checked + .toggle-slider {
            background: var(--gradient-1);
        }

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

        /* Área de preview */
        .preview-area {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            padding: 2rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 2rem;
        }

        .canvas-container {
            background: var(--secondary-bg);
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
            max-width: 100%;
        }

        #wallpaperCanvas {
            display: block;
            max-width: 100%;
            height: auto;
        }

        .action-buttons {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
            justify-content: center;
        }

        .btn {
            background: var(--secondary-bg);
            border: 2px solid var(--glass-border);
            border-radius: 12px;
            padding: 0.8rem 1.5rem;
            color: var(--text-primary);
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn:hover {
            border-color: var(--accent-neon);
            transform: translateY(-2px);
            box-shadow: 0 10px 20px rgba(0, 242, 254, 0.2);
        }

        .btn-primary {
            background: var(--gradient-1);
            border: none;
        }

        .btn-success {
            background: var(--gradient-4);
            border: none;
        }

        .btn-warning {
            background: var(--gradient-2);
            border: none;
        }

        /* Subida de archivos */
        .upload-section {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            padding: 2rem;
            margin: 2rem auto;
            max-width: 1400px;
        }

        .upload-area {
            border: 2px dashed var(--glass-border);
            border-radius: 16px;
            padding: 3rem;
            text-align: center;
            cursor: pointer;
            transition: all 0.3s ease;
            background: var(--secondary-bg);
        }

        .upload-area:hover {
            border-color: var(--accent-cyan);
            background: rgba(79, 172, 254, 0.1);
        }

        .upload-area.dragover {
            border-color: var(--accent-magenta);
            background: rgba(240, 147, 251, 0.1);
        }

        .upload-icon {
            font-size: 3rem;
            margin-bottom: 1rem;
            color: var(--accent-cyan);
        }

        .image-preview {
            margin-top: 2rem;
            display: none;
            grid-template-columns: 200px 1fr;
            gap: 2rem;
            align-items: start;
        }

        .image-preview.show {
            display: grid;
        }

        .preview-image {
            width: 200px;
            height: 200px;
            object-fit: cover;
            border-radius: 12px;
            border: 2px solid var(--glass-border);
        }

        .image-controls {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        /* Galería */
        .gallery-section {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            padding: 2rem;
            margin: 2rem auto;
            max-width: 1400px;
        }

        .gallery-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 1rem;
            margin-top: 2rem;
        }

        .gallery-item {
            background: var(--secondary-bg);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .gallery-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
        }

        .gallery-item img {
            width: 100%;
            height: 150px;
            object-fit: cover;
        }

        .gallery-item-info {
            padding: 1rem;
        }

        .gallery-item-title {
            font-weight: 500;
            margin-bottom: 0.5rem;
        }

        .gallery-item-date {
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        /* Modal */
        .modal {
            display: none;
            position: fixed;
            z-index: 2000;
            left: 0;
            top: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.8);
            backdrop-filter: blur(5px);
        }

        .modal-content {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            margin: 5% auto;
            padding: 2rem;
            width: 90%;
            max-width: 600px;
            max-height: 80vh;
            overflow-y: auto;
        }

        .close {
            color: var(--text-secondary);
            float: right;
            font-size: 28px;
            font-weight: bold;
            cursor: pointer;
        }

        .close:hover {
            color: var(--text-primary);
        }

        /* Toast notifications */
        .toast {
            position: fixed;
            bottom: 20px;
            right: 20px;
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 12px;
            padding: 1rem 1.5rem;
            color: var(--text-primary);
            z-index: 3000;
            transform: translateX(400px);
            transition: all 0.3s ease;
        }

        .toast.show {
            transform: translateX(0);
        }

        .toast.success {
            border-left: 4px solid var(--gradient-4);
        }

        .toast.error {
            border-left: 4px solid #ff4757;
        }

        /* Responsive */
        @media (max-width: 1200px) {
            .main-container {
                grid-template-columns: 250px 1fr;
                gap: 1rem;
            }

            .control-panel:last-child {
                display: none;
            }
        }

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

            .control-panel {
                position: static;
            }

            .control-panel:first-child {
                order: 2;
            }

            .preview-area {
                order: 1;
            }

            .header-content {
                flex-direction: column;
                gap: 1rem;
            }
        }

        @media (max-width: 480px) {
            .main-container {
                padding: 0 1rem;
            }

            .control-panel {
                padding: 1rem;
            }

            .action-buttons {
                flex-direction: column;
            }

            .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* Animaciones */
        @keyframes glow {
            0%, 100% { box-shadow: 0 0 20px rgba(0, 242, 254, 0.3); }
            50% { box-shadow: 0 0 30px rgba(0, 242, 254, 0.6); }
        }

        .glow {
            animation: glow 2s ease-in-out infinite;
        }

        @keyframes slideIn {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .slide-in {
            animation: slideIn 0.5s ease-out;
        }

        /* Efectos de glassmorphism mejorados */
        .glass-card {
            background: var(--glass-bg);
            backdrop-filter: blur(20px);
            border: 1px solid var(--glass-border);
            border-radius: 20px;
            box-shadow: 0 8px 32px rgba(31, 38, 135, 0.37);
        }

        .neon-border {
            position: relative;
            border: 2px solid transparent;
            background: linear-gradient(var(--primary-bg), var(--primary-bg)) padding-box,
                        linear-gradient(45deg, var(--accent-neon), var(--accent-magenta)) border-box;
        }

        /* Indicadores de carga */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid var(--glass-border);
            border-radius: 50%;
            border-top-color: var(--accent-neon);
            animation: spin 1s ease-in-out infinite;
        }

        @keyframes spin {
            to { transform: rotate(360deg); }
        }