:root {
            --light-bg-color: #f5f5f7;
            --light-text-color: #1c1c1e;
            --light-card-color: #ffffff;
            --light-border-color: #e0e0e0;
            --light-button-bg: #007aff;
            --light-button-text: #ffffff;
            --light-link-color: #007aff;
            --light-dialog-bg: rgba(255, 255, 255, 0.9);
            --light-dialog-backdrop: rgba(0, 0, 0, 0.2);

            --dark-bg-color: #1c1c1e;
            --dark-text-color: #e0e0e0;
            --dark-card-color: #2c2c2e;
            --dark-border-color: #404040;
            --dark-button-bg: #0a84ff;
            --dark-button-text: #ffffff;
            --dark-link-color: #0a84ff;
            --dark-dialog-bg: rgba(44, 44, 46, 0.9);
            --dark-dialog-backdrop: rgba(0, 0, 0, 0.5);
        }

        body {
            font-family: 'Roboto', sans-serif;
            margin: 0;
            padding: 20px;
            background-color: var(--light-bg-color);
            color: var(--light-text-color);
            transition: background-color 0.3s, color 0.3s;
            display: flex;
            flex-direction: column;
            align-items: center;
            min-height: 100vh;
        }

        .dark-mode {
            background-color: var(--dark-bg-color);
            color: var(--dark-text-color);
        }

        .container {
            width: 100%;
            max-width: 600px;
            margin: auto;
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        .ios-card {
            background-color: var(--light-card-color);
            border-radius: 15px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            padding: 25px;
            width: 100%;
            max-width: 600px;
            box-sizing: border-box;
            transition: background-color 0.3s, box-shadow 0.3s;
        }

        .dark-mode .ios-card {
            background-color: var(--dark-card-color);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
        }

        .header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .header h1 {
            font-size: 28px;
            font-weight: 700;
            margin: 0;
        }

        .header .actions {
            display: flex;
            gap: 10px;
        }

        .theme-toggle-btn, .credit-btn, .history-btn, .fullscreen-btn {
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
            color: var(--light-text-color);
            transition: color 0.3s;
        }

        .dark-mode .theme-toggle-btn, .dark-mode .credit-btn, .dark-mode .history-btn, .dark-mode .fullscreen-btn {
            color: var(--dark-text-color);
        }

        .material-symbols-outlined {
            font-size: 28px;
        }

        textarea {
            width: 100%;
            height: 300px;
            border: 1px solid var(--light-border-color);
            border-radius: 10px;
            padding: 15px;
            font-size: 16px;
            line-height: 1.6;
            resize: none;
            box-sizing: border-box;
            background-color: var(--light-bg-color);
            color: var(--light-text-color);
            transition: background-color 0.3s, color 0.3s, border-color 0.3s;
        }
        
        .dark-mode textarea {
            background-color: var(--dark-bg-color);
            color: var(--dark-text-color);
            border: 1px solid var(--dark-border-color);
        }

        textarea:focus {
            outline: none;
            border-color: var(--light-link-color);
        }

        .dark-mode textarea:focus {
            border-color: var(--dark-link-color);
        }

        .buttons-container {
            display: flex;
            justify-content: flex-end;
            gap: 15px;
            margin-top: 20px;
        }

        .ios-btn {
            padding: 12px 25px;
            border-radius: 10px;
            font-size: 16px;
            cursor: pointer;
            transition: transform 0.2s, background-color 0.2s;
            font-weight: 700;
            border: none;
        }

        .ios-btn-primary {
            background-color: var(--light-button-bg);
            color: var(--light-button-text);
        }

        .dark-mode .ios-btn-primary {
            background-color: var(--dark-button-bg);
            color: var(--dark-button-text);
        }
        
        .ios-btn-secondary {
            background-color: transparent;
            color: var(--light-button-bg);
            border: 1px solid var(--light-button-bg);
        }

        .dark-mode .ios-btn-secondary {
            color: var(--dark-button-bg);
            border: 1px solid var(--dark-button-bg);
        }

        .ios-btn:active {
            transform: scale(0.98);
        }

        .ios-btn.small {
            padding: 5px 10px;
            font-size: 14px;
        }

        /* Footer */
        .footer {
            margin-top: auto;
            padding: 20px 0;
            text-align: center;
            font-size: 14px;
            color: #8e8e93;
            width: 100%;
        }

        .dark-mode .footer {
            color: #808080;
        }

        /* Diálogos (Alerts, Toasts, Modals) */
        .ios-dialog-backdrop {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: var(--light-dialog-backdrop);
            backdrop-filter: blur(5px);
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
        }

        .dark-mode .ios-dialog-backdrop {
            background-color: var(--dark-dialog-backdrop);
        }

        .ios-dialog-backdrop.show {
            opacity: 1;
            pointer-events: auto;
        }

        .ios-dialog {
            background-color: var(--light-dialog-bg);
            backdrop-filter: blur(10px);
            border-radius: 15px;
            padding: 20px;
            text-align: center;
            max-width: 300px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
            transform: scale(0.9);
            transition: transform 0.3s;
        }

        .dark-mode .ios-dialog {
            background-color: var(--dark-dialog-bg);
        }

        .ios-dialog-backdrop.show .ios-dialog {
            transform: scale(1);
        }

        .ios-dialog h3 {
            margin-top: 0;
            font-size: 18px;
            font-weight: 700;
        }

        .ios-dialog p {
            font-size: 14px;
            color: #555;
            margin: 10px 0 20px 0;
        }

        .dark-mode .ios-dialog p {
            color: #bbb;
        }

        .ios-dialog-btn-container {
            display: flex;
            justify-content: center;
            gap: 10px;
        }

        .ios-dialog-btn {
            flex: 1;
            padding: 10px;
            border-radius: 8px;
            border: none;
            background-color: var(--light-button-bg);
            color: var(--light-button-text);
            font-weight: 600;
            cursor: pointer;
        }
        
        .ios-dialog-btn.cancel {
            background: none;
            color: var(--light-text-color);
        }

        .dark-mode .ios-dialog-btn.cancel {
            color: var(--dark-text-color);
        }
        
        .ios-toast {
            position: fixed;
            bottom: 30px;
            background-color: rgba(0, 0, 0, 0.7);
            color: white;
            padding: 10px 20px;
            border-radius: 10px;
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.3s, transform 0.3s;
            z-index: 1001;
        }

        .ios-toast.show {
            opacity: 1;
            transform: translateY(0);
        }
        
        /* Créditos */
        .credit-profile {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 15px;
            margin-bottom: 20px;
        }

        .credit-profile img {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            object-fit: cover;
            border: 3px solid var(--light-link-color);
        }

        .dark-mode .credit-profile img {
            border-color: var(--dark-link-color);
        }

        .credit-info {
            text-align: center;
        }

        .credit-info h4 {
            font-size: 20px;
            margin: 0;
        }

        .credit-info p {
            font-size: 14px;
            color: #8e8e93;
            margin: 5px 0 0 0;
        }
        
        .dark-mode .credit-info p {
            color: #bbb;
        }

        .social-links {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
        }

        .social-link {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--light-link-color);
            text-decoration: none;
            font-weight: 500;
            transition: color 0.2s;
        }

        .dark-mode .social-link {
            color: var(--dark-link-color);
        }
        
        .social-icon {
            width: 20px;
            height: 20px;
        }

        /* Historial */
        #history-list {
            list-style: none;
            padding: 0;
            width: 100%;
            max-height: 400px;
            overflow-y: auto;
            border-radius: 10px;
            border: 1px solid var(--light-border-color);
        }

        .dark-mode #history-list {
            border-color: var(--dark-border-color);
        }

        .history-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px;
            border-bottom: 1px solid var(--light-border-color);
            transition: background-color 0.2s;
        }

        .dark-mode .history-item {
            border-color: var(--dark-border-color);
        }

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

        .history-item:hover {
            background-color: rgba(0, 0, 0, 0.05);
        }

        .dark-mode .history-item:hover {
            background-color: rgba(255, 255, 255, 0.05);
        }

        .history-item-content {
            flex: 1;
            cursor: pointer;
        }

        .history-item h4 {
            margin: 0;
            font-size: 16px;
            font-weight: 600;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        
        .history-item p {
            margin: 5px 0 0 0;
            font-size: 12px;
            color: #8e8e93;
        }

        .dark-mode .history-item p {
            color: #bbb;
        }

        .history-item-actions {
            display: flex;
            gap: 10px;
        }

        .history-actions {
            display: flex;
            justify-content: center;
            gap: 10px;
            margin-top: 20px;
        }
        
        #history-input {
            display: none;
        }

        #history-status {
            text-align: center;
            margin-top: 10px;
            font-style: italic;
            color: #8e8e93;
        }

        /* Full Screen Mode */
        .full-screen {
            padding: 0;
        }

        .full-screen .container {
            max-width: none;
            height: 100vh;
            margin: 0;
            align-items: stretch;
        }

        .full-screen .ios-card {
            border-radius: 0;
            box-shadow: none;
            padding: 0;
            height: 100%;
            width: 100%;
        }

        .full-screen .header {
            display: none;
        }

        .full-screen textarea {
            height: calc(100% - 60px);
            border: 0;
            border-radius: 0;
            padding: 20px;
        }

        .full-screen .buttons-container {
            display: none;
        }

        .full-screen .footer {
            display: none;
        }

        .floating-buttons {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background-color: var(--light-card-color);
            padding: 10px;
            justify-content: space-around;
            box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
            z-index: 10;
            transition: background-color 0.3s;
        }

        .dark-mode .floating-buttons {
            background-color: var(--dark-card-color);
        }

        .full-screen .floating-buttons {
            display: flex;
        }