/* ===== CSS VARIABLES ===== */
    :root {
        --primary-color: #1f7e78;
        --primary-dark: #145854;
        --primary-light: #2a9b94;
        --secondary-color: #2a9b7f;
        --accent-color: #f59e0b;
        --text-color: #1a1a2e;
        --text-muted: #64748b;
        --light-bg: #f8fafc;
        --white: #ffffff;
        --gray: #6c757d;
        --gray-100: #f1f5f9;
        --gray-200: #e2e8f0;
        --border-color: #e2e8f0;
        --shadow-sm: 0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.06);
        --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.04);
        --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
        --radius-sm: 6px;
        --radius-md: 10px;
        --radius-lg: 16px;
        --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
        --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    }

    /* ===== RESET & BASE WITH VENDOR PREFIXES ===== */
    *, *::before, *::after {
        margin: 0;
        padding: 0;
        -webkit-box-sizing: border-box;
        -moz-box-sizing: border-box;
        box-sizing: border-box;
    }

    html {
        -webkit-text-size-adjust: 100%;
        -moz-text-size-adjust: 100%;
        -ms-text-size-adjust: 100%;
        text-size-adjust: 100%;
        -webkit-tap-highlight-color: transparent;
    }

    body {
        font-family: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
        color: var(--text-color);
        line-height: 1.6;
        background-color: var(--light-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        text-rendering: optimizeLegibility;
        overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
        font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
        color: var(--text-color);
        margin-bottom: 1rem;
        font-weight: 600;
        line-height: 1.3;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
        -ms-interpolation-mode: bicubic;
    }

    input, select, textarea, button {
        font-family: inherit;
        font-size: inherit;
        -webkit-appearance: none;
        -moz-appearance: none;
        appearance: none;
    }

    /* ===== CONTAINER ===== */
    .container {
        width: 100%;
        max-width: 1400px;
        margin: 0 auto;
        padding: 0 clamp(16px, 4vw, 32px);
    }

    /* ===== HERO SECTION - MODERN GRADIENT ===== */
    .hero-section {
        background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 50%, #0d4f4a 100%);
        color: white;
        padding: clamp(2rem, 5vw, 4rem) 0;
        margin-bottom: clamp(1.5rem, 4vw, 3rem);
        position: relative;
        overflow: hidden;
    }

    .hero-section::before {
        content: '';
        position: absolute;
        top: -50%;
        right: -50%;
        bottom: -50%;
        left: -50%;
        background: url('data:image/svg+xml,%3Csvg width="60" height="60" viewBox="0 0 60 60" xmlns="http://www.w3.org/2000/svg"%3E%3Cg fill="none" fill-rule="evenodd"%3E%3Cg fill="%23ffffff" fill-opacity="0.04"%3E%3Cpath d="M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z"/%3E%3C/g%3E%3C/g%3E%3C/svg%3E') repeat;
        -webkit-animation: backgroundMove 30s linear infinite;
        animation: backgroundMove 30s linear infinite;
        will-change: transform;
    }

    @-webkit-keyframes backgroundMove {
        0% { -webkit-transform: translate(0, 0); transform: translate(0, 0); }
        100% { -webkit-transform: translate(60px, 60px); transform: translate(60px, 60px); }
    }

    @keyframes backgroundMove {
        0% { -webkit-transform: translate(0, 0); transform: translate(0, 0); }
        100% { -webkit-transform: translate(60px, 60px); transform: translate(60px, 60px); }
    }

    .hero-content {
        position: relative;
        z-index: 1;
        text-align: center;
    }

    .hero-content h1 {
        font-size: clamp(1.75rem, 5vw, 2.75rem);
        margin-bottom: 1rem;
        color: white;
        font-weight: 700;
        letter-spacing: -0.02em;
    }

    .hero-content p {
        font-size: clamp(1rem, 2.5vw, 1.25rem);
        opacity: 0.92;
        max-width: 700px;
        margin: 0 auto;
    }

    /* ===== FEATURES BAR ===== */
    .features-bar {
        background: var(--white);
        padding: clamp(0.75rem, 2vw, 1.25rem);
        border-radius: var(--radius-lg);
        -webkit-box-shadow: var(--shadow-md);
        box-shadow: var(--shadow-md);
        margin-bottom: clamp(1.5rem, 3vw, 2rem);
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-pack: distribute;
        -ms-flex-pack: distribute;
        justify-content: space-around;
        -webkit-flex-wrap: wrap;
        -ms-flex-wrap: wrap;
        flex-wrap: wrap;
        gap: clamp(0.5rem, 2vw, 1rem);
    }

    .feature-item {
        display: -webkit-box;
        display: -ms-flexbox;
        display: flex;
        -webkit-box-align: center;
        -ms-flex-align: center;
        align-items: center;
        gap: 0.5rem;
        color: var(--primary-color);
    }
    
    .feature-item svg {
        width: 24px;
        height: 24px;
    }
    
    /* Main Content Layout */
    .main-content {
        display: grid;
        grid-template-columns: minmax(500px, 580px) 1.5fr;
        gap: 2.5rem;
        margin-bottom: 3rem;
        max-width: 100%;
        width: 100%;
        padding: 0;
    }

    .form-section, .preview-section {
        background: white;
        padding: 2rem;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        min-width: 0;
    }
    
    .section-title {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
        color: var(--primary-color);
        border-bottom: 2px solid var(--primary-color);
        padding-bottom: 0.5rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 1rem;
    }
    
    /* Form Tabs */
    .form-tabs {
        display: flex;
        gap: 0.5rem;
        margin-bottom: 1.5rem;
        border-bottom: 2px solid var(--border-color);
    }
    
    .form-tab {
        padding: 0.75rem 1.5rem;
        background: none;
        border: none;
        color: var(--gray);
        cursor: pointer;
        transition: all 0.3s ease;
        font-weight: 500;
        position: relative;
        font-family: 'Lato', sans-serif;
    }
    
    .form-tab:hover {
        color: var(--primary-color);
    }
    
    .form-tab.active {
        color: var(--primary-color);
    }
    
    .form-tab.active::after {
        content: '';
        position: absolute;
        bottom: -2px;
        left: 0;
        right: 0;
        height: 2px;
        background: var(--primary-color);
    }
    
    .form-panel {
        display: none;
    }
    
    .form-panel.active {
        display: block;
        animation: fadeIn 0.3s ease-in-out;
    }
    
    /* Form Styles */
    .form-group {
        margin-bottom: 1.5rem;
    }
    
    .form-group label {
        display: block;
        margin-bottom: 0.5rem;
        font-weight: 600;
        color: var(--text-color);
    }
    
    .form-group input, 
    .form-group select, 
    .form-group textarea {
        width: 100%;
        padding: 0.75rem;
        border: 1px solid var(--border-color);
        border-radius: 5px;
        font-size: 1rem;
        font-family: 'Lato', sans-serif;
        transition: border-color 0.3s ease;
    }
    
    .form-group textarea {
        resize: vertical;
        min-height: 80px;
    }
    
    .form-group input:focus, 
    .form-group select:focus, 
    .form-group textarea:focus {
        outline: none;
        border-color: var(--primary-color);
    }
    
    .form-row {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }
    
    .optional-badge {
        font-size: 0.75rem;
        color: var(--gray);
        font-weight: normal;
    }
    
    /* Logo Upload */
    .logo-upload-area {
        border: 2px dashed var(--border-color);
        border-radius: 5px;
        padding: 1.5rem;
        text-align: center;
        transition: all 0.3s ease;
        cursor: pointer;
        background: var(--light-bg);
    }
    
    .logo-upload-area:hover {
        border-color: var(--primary-color);
        background: white;
    }
    
    .logo-upload-area.has-logo {
        border-color: var(--secondary-color);
        background: white;
    }
    
    #logoInput {
        display: none;
    }
    
    .logo-preview {
        max-width: 150px;
        max-height: 100px;
        margin: 1rem auto;
        display: none;
    }
    
    .logo-preview img {
        max-width: 100%;
        max-height: 100%;
    }
    
    .logo-controls {
        display: none;
        margin-top: 1rem;
        gap: 0.5rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .logo-controls.active {
        display: flex;
    }
    
    .logo-size-control {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    
    .logo-size-control input[type="range"] {
        width: 100px;
    }
    
    /* Template Tabs */
    .template-tabs {
        display: flex;
        gap: 0.5rem;
        margin-bottom: 1rem;
        overflow-x: auto;
        border-bottom: 2px solid var(--border-color);
        padding-bottom: 0.5rem;
    }

    .template-tab {
        padding: 0.5rem 1rem;
        background: var(--light-bg);
        border: 1px solid var(--border-color);
        border-radius: 5px 5px 0 0;
        cursor: pointer;
        white-space: nowrap;
        transition: all 0.3s ease;
        font-size: 0.9rem;
    }

    .template-tab:hover {
        background: #e9ecef;
    }

    .template-tab.active {
        background: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
    }

    /* Template Grid Container con Scroll */
    .template-grid-container {
        max-height: 400px;
        overflow-y: auto;
        overflow-x: hidden;
        border: 1px solid var(--border-color);
        border-radius: 5px;
        padding: 1rem;
        background: white;
    }

    .template-grid-container::-webkit-scrollbar {
        width: 8px;
    }

    .template-grid-container::-webkit-scrollbar-track {
        background: var(--light-bg);
        border-radius: 4px;
    }

    .template-grid-container::-webkit-scrollbar-thumb {
        background: var(--primary-color);
        border-radius: 4px;
    }

    .template-grid-container::-webkit-scrollbar-thumb:hover {
        background: var(--secondary-color);
    }

    .template-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 0.75rem;
    }

    .template-category {
        display: none;
    }

    .template-category.active {
        display: block;
    }

    .template-card {
        border: 2px solid var(--border-color);
        border-radius: 5px;
        padding: 0.5rem;
        cursor: pointer;
        transition: all 0.3s ease;
        text-align: center;
        background: white;
    }

    .template-card:hover {
        border-color: var(--primary-color);
        transform: translateY(-2px);
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    }

    .template-card.active {
        border-color: var(--secondary-color);
        background: linear-gradient(135deg, rgba(94,145,208,0.1), rgba(38,69,115,0.1));
        box-shadow: 0 0 0 3px rgba(38,69,115,0.2);
    }

    .template-card > div {
        width: 100%;
        height: 60px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-bottom: 0.5rem;
        border-radius: 3px;
    }

    .template-card span {
        font-size: 0.75rem;
        color: var(--text-color);
        font-weight: 500;
    }
    
    /* Color Picker */
    .color-picker-group {
        display: flex;
        gap: 1rem;
        align-items: center;
        flex-wrap: wrap;
    }
    
    .color-input-wrapper {
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }
    
    .color-input-wrapper input[type="color"] {
        width: 50px;
        height: 40px;
        border: none;
        border-radius: 5px;
        cursor: pointer;
    }
    
    .color-input-wrapper input[type="text"] {
        width: 100px;
        padding: 0.5rem;
    }
    
    /* Preview Section */
    .preview-controls {
        display: flex;
        gap: 0.5rem;
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .preview-btn {
        padding: 0.5rem 1rem;
        border: 1px solid var(--border-color);
        background: white;
        border-radius: 5px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-size: 0.9rem;
        font-family: 'Lato', sans-serif;
        white-space: nowrap;
    }
    
    .preview-btn:hover {
        border-color: var(--primary-color);
        background: var(--light-bg);
    }
    
    .preview-btn.active {
        background: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
    }
    
    .preview-container {
        border: 2px dashed var(--border-color);
        padding: 2rem;
        border-radius: 5px;
        min-height: 200px;
        background: white;
        margin-top: 1rem;
    }
    
    .preview-container.dark-mode {
        background: #1a1a1a;
        color: white;
    }
    
    #signaturePreview {
        font-family: Arial, sans-serif;
    }
    
    /* Code Section */
    .code-section {
        background: white;
        padding: 2rem;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        margin-bottom: 2rem;
    }
    
    .compatibility-notice {
        background: #e3eef9;
        border-left: 4px solid var(--secondary-color);
        padding: 1rem;
        margin-bottom: 1rem;
        border-radius: 5px;
    }
    
    .compatibility-notice h4 {
        margin: 0 0 0.5rem 0;
        color: var(--secondary-color);
        font-family: 'Poppins', sans-serif;
    }
    
    .compatibility-notice p {
        margin: 0;
        font-size: 0.9rem;
        color: #555;
    }
    
    .compatibility-notice ul {
        margin: 0.5rem 0 0 1.5rem;
        font-size: 0.9rem;
        color: #666;
    }
    
    .compatibility-notice em {
        font-size: 0.85rem;
        color: #777;
    }
    
    .code-actions {
        display: flex;
        gap: 0.5rem;
        margin-bottom: 1rem;
        flex-wrap: wrap;
    }
    
    .code-btn {
        padding: 0.5rem 1rem;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 5px;
        cursor: pointer;
        transition: all 0.3s ease;
        display: flex;
        align-items: center;
        gap: 0.5rem;
        font-family: 'Lato', sans-serif;
    }
    
    .code-btn:hover {
        background: var(--secondary-color);
        transform: translateY(-1px);
    }
    
    .code-container {
        background: #f4f4f4;
        border: 1px solid var(--border-color);
        border-radius: 5px;
        padding: 1rem;
        position: relative;
        max-height: 400px;
        overflow-y: auto;
    }
    
    #generatedCode {
        white-space: pre-wrap;
        word-wrap: break-word;
        font-family: 'Courier New', monospace;
        font-size: 0.9rem;
        color: #333;
    }
    
    /* Save/Load Signatures */
    .saved-signatures {
        background: white;
        padding: 2rem;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        margin-bottom: 2rem;
    }
    
    .signature-list {
        display: grid;
        gap: 1rem;
        margin-top: 1rem;
    }
    
    .signature-item {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 1rem;
        border: 1px solid var(--border-color);
        border-radius: 5px;
        transition: all 0.3s ease;
    }
    
    .signature-item:hover {
        border-color: var(--primary-color);
        background: var(--light-bg);
    }
    
    .signature-item-actions {
        display: flex;
        gap: 0.5rem;
    }
    
    /* Instructions Section */
    .instructions-section {
        background: white;
        padding: 2rem;
        border-radius: 10px;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    }
    
    .instructions-section h4,
    .instructions-title {
        font-family: 'Poppins', sans-serif;
        font-size: 1.1rem;
        color: var(--primary-color);
        margin: 1.5rem 0 0.5rem 0;
        padding-bottom: 0.5rem;
        border-bottom: 1px solid var(--border-color);
    }
    
    .client-tabs {
        display: flex;
        gap: 0.5rem;
        margin-bottom: 1.5rem;
        flex-wrap: wrap;
    }
    
    .client-tab {
        padding: 0.5rem 1rem;
        background: var(--light-bg);
        border: 2px solid transparent;
        border-radius: 5px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-family: 'Lato', sans-serif;
        font-size: 0.9rem;
    }
    
    .client-tab:hover {
        background: white;
        border-color: var(--primary-color);
    }
    
    .client-tab.active {
        background: var(--primary-color);
        color: white;
        border-color: var(--primary-color);
    }
    
    .client-content {
        display: none;
        padding: 1.5rem;
        background: var(--light-bg);
        border-radius: 5px;
        margin-bottom: 1rem;
    }
    
    .client-content.active {
        display: block;
        animation: fadeIn 0.3s ease-in-out;
    }
    
    .client-content h3 {
        color: var(--primary-color);
        margin-bottom: 1rem;
        font-family: 'Poppins', sans-serif;
    }
    
    .client-content ol {
        padding-left: 1.5rem;
        line-height: 1.8;
    }
    
    .client-content li {
        margin-bottom: 0.75rem;
        color: var(--text-color);
    }
    
    .client-content p {
        line-height: 1.6;
        color: var(--text-color);
        margin-top: 1rem;
    }
    
    .client-content strong {
        color: var(--primary-color);
        font-weight: 600;
    }
    
    /* Buttons */
    .btn {
        display: inline-flex;
        align-items: center;
        gap: 0.5rem;
        padding: 0.75rem 1.5rem;
        border-radius: 5px;
        text-decoration: none;
        font-weight: 500;
        transition: all 0.3s ease;
        font-family: 'Lato', sans-serif;
        cursor: pointer;
        border: none;
        font-size: 1rem;
    }
    
    .btn-primary {
        background-color: var(--primary-color);
        color: var(--white);
    }
    
    .btn-primary:hover {
        background-color: #185e59;
        transform: translateY(-2px);
        box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    }
    
    .btn-secondary {
        background-color: var(--secondary-color);
        color: var(--white);
    }
    
    .btn-secondary:hover {
        background-color: #238866;
    }
    
    .btn svg {
        width: 20px;
        height: 20px;
    }
    
    .small-btn {
        padding: 0.25rem 0.75rem;
        font-size: 0.875rem;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 3px;
        cursor: pointer;
        transition: all 0.3s ease;
        font-family: 'Lato', sans-serif;
    }
    
    .small-btn:hover {
        background: var(--secondary-color);
    }
    
    .small-btn.danger {
        background: #dc3545;
    }
    
    .small-btn.danger:hover {
        background: #c82333;
    }
    
    /* Badges */
    .new-badge {
        display: inline-block;
        background: #ff6b6b;
        color: white;
        font-size: 0.7rem;
        padding: 0.2rem 0.5rem;
        border-radius: 10px;
        margin-left: 0.5rem;
        font-weight: bold;
    }
    
    /* Animazioni */
    @keyframes fadeIn {
        from {
            opacity: 0;
            transform: translateY(10px);
        }
        to {
            opacity: 1;
            transform: translateY(0);
        }
    }
    
    .fade-in {
        animation: fadeIn 0.3s ease-in-out;
    }
    
    /* Sistema Notifiche Toast */
    .toast-container {
        position: fixed;
        top: 20px;
        right: 20px;
        z-index: 10000;
        max-width: 400px;
    }

    .toast {
        background: white;
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.15);
        padding: 16px 20px;
        margin-bottom: 10px;
        display: flex;
        align-items: flex-start;
        gap: 12px;
        animation: slideInRight 0.3s ease-out;
        border-left: 4px solid;
    }

    .toast.error {
        border-left-color: #dc3545;
    }

    .toast.success {
        border-left-color: #28a745;
    }

    .toast.warning {
        border-left-color: #ffc107;
    }

    .toast.info {
        border-left-color: #17a2b8;
    }

    .toast-icon {
        font-size: 20px;
        flex-shrink: 0;
    }

    .toast.error .toast-icon { color: #dc3545; }
    .toast.success .toast-icon { color: #28a745; }
    .toast.warning .toast-icon { color: #ffc107; }
    .toast.info .toast-icon { color: #17a2b8; }

    .toast-content {
        flex: 1;
    }

    .toast-title {
        font-weight: 600;
        margin-bottom: 4px;
        color: var(--text-color);
    }

    .toast-message {
        font-size: 0.9rem;
        color: #666;
        line-height: 1.4;
    }

    .toast-close {
        background: none;
        border: none;
        font-size: 20px;
        color: #999;
        cursor: pointer;
        padding: 0;
        line-height: 1;
        flex-shrink: 0;
    }

    .toast-close:hover {
        color: #333;
    }

    @keyframes slideInRight {
        from {
            transform: translateX(100%);
            opacity: 0;
        }
        to {
            transform: translateX(0);
            opacity: 1;
        }
    }

    @keyframes slideOutRight {
        from {
            transform: translateX(0);
            opacity: 1;
        }
        to {
            transform: translateX(100%);
            opacity: 0;
        }
    }

    .toast.hiding {
        animation: slideOutRight 0.3s ease-out forwards;
    }

    /* Sezioni Collapsible */
    .collapsible-section {
        margin-bottom: 1rem;
        border: 1px solid var(--border-color);
        border-radius: 5px;
        overflow: hidden;
    }

    .collapsible-header {
        background: var(--light-bg);
        padding: 0.75rem 1rem;
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-weight: 600;
        transition: background 0.2s;
        user-select: none;
    }

    .collapsible-header:hover {
        background: #e9ecef;
    }

    .collapsible-header .icon {
        transition: transform 0.3s;
        font-size: 0.8rem;
    }

    .collapsible-header.active .icon {
        transform: rotate(180deg);
    }

    .collapsible-content {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease-out;
        padding: 0 1rem;
    }

    .collapsible-content.active {
        max-height: 2000px;
        padding: 1rem;
        transition: max-height 0.5s ease-in;
        overflow-y: auto;
    }

    /* Font Selectors Compatti */
    .font-selector-compact {
        display: grid;
        gap: 0.5rem;
    }

    .font-selector-compact select {
        width: 100%;
    }

    /* Tooltip System */
    .tooltip-icon {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        width: 18px;
        height: 18px;
        border-radius: 50%;
        background: var(--primary-color);
        color: white;
        font-size: 12px;
        font-weight: bold;
        cursor: help;
        margin-left: 0.5rem;
        position: relative;
    }

    .tooltip-icon:hover::after {
        content: attr(data-tooltip);
        position: absolute;
        left: 50%;
        bottom: 125%;
        transform: translateX(-50%);
        background: #5e91d0;
        color: white;
        padding: 0.4rem 1.2rem;
        border-radius: 5px;
        font-size: 0.85rem;
        white-space: normal;
        width: 140px;
        z-index: 1000;
        box-shadow: 0 4px 10px rgba(0,0,0,0.2);
        font-weight: normal;
        line-height: 1.3;
    }

    .tooltip-icon:hover::before {
        content: '';
        position: absolute;
        left: 50%;
        bottom: 115%;
        transform: translateX(-50%);
        border: 6px solid transparent;
        border-top-color: #5e91d0;
        z-index: 1000;
    }

    /* Error field animation */
    .error-field {
        animation: shake 0.3s ease-in-out;
    }

    @keyframes shake {
        0%, 100% { transform: translateX(0); }
        25% { transform: translateX(-5px); }
        75% { transform: translateX(5px); }
    }

    /* Mobile preview mode */
    .mobile-mode {
        border: 2px dashed #ccc;
        border-radius: 20px;
        padding: 10px;
        background: linear-gradient(to bottom, #f0f0f0 0%, #fff 10%);
    }

    .mobile-mode::before {
        content: 'Mobile Preview';
        display: block;
        text-align: center;
        font-size: 0.75rem;
        color: #999;
        margin-bottom: 10px;
        text-transform: uppercase;
        letter-spacing: 1px;
    }

    /* Loading indicator for generation */
    .generating-indicator {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        padding: 1rem 2rem;
        background: rgba(255,255,255,0.95);
        border-radius: 8px;
        box-shadow: 0 4px 15px rgba(0,0,0,0.1);
        z-index: 100;
    }

    /* Responsive */
    @media (max-width: 968px) {
        .main-content {
            grid-template-columns: 1fr;
        }

        .form-row {
            grid-template-columns: 1fr;
        }

        .section-title {
            flex-direction: column;
            align-items: flex-start;
        }

        .preview-controls {
            width: 100%;
            justify-content: flex-start;
        }

        .preview-btn {
            flex: 0 1 auto;
            font-size: 0.85rem;
            padding: 0.4rem 0.8rem;
        }

        .hero-content h1 {
            font-size: 2rem;
        }

        .template-grid {
            grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        }

        .features-bar {
            flex-direction: column;
        }

        .toast-container {
            top: 10px;
            right: 10px;
            left: 10px;
            max-width: none;
        }
    }

    /* Print styles */
    @media print {
        .form-section, .hero-section, .features-bar, .toast-container, header, footer {
            display: none !important;
        }
        .preview-section {
            -webkit-box-shadow: none;
            box-shadow: none;
            border: none;
        }
    }

    /* ===== ADDITIONAL BREAKPOINTS ===== */

    /* Large Desktop (1400px+) */
    @media screen and (min-width: 1400px) {
        .main-content {
            gap: 3rem;
        }
        .template-grid {
            grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        }
    }

    /* Desktop (1024px - 1399px) */
    @media screen and (min-width: 1024px) and (max-width: 1399px) {
        .main-content {
            gap: 2rem;
        }
    }

    /* Tablet Landscape (768px - 1023px) */
    @media screen and (min-width: 768px) and (max-width: 1023px) {
        .main-content {
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
        }

        .preview-section {
            grid-column: 1 / -1;
        }

        .template-grid {
            grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        }

        .form-tabs {
            -ms-overflow-style: none;
            scrollbar-width: none;
            -webkit-overflow-scrolling: touch;
        }

        .form-tabs::-webkit-scrollbar {
            display: none;
        }
    }

    /* Tablet Portrait (600px - 767px) */
    @media screen and (min-width: 600px) and (max-width: 767px) {
        .main-content {
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        .form-row {
            grid-template-columns: 1fr;
        }

        .template-grid {
            grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
        }

        .preview-controls {
            -webkit-flex-wrap: wrap;
            -ms-flex-wrap: wrap;
            flex-wrap: wrap;
        }
    }

    /* Mobile (480px - 599px) */
    @media screen and (min-width: 480px) and (max-width: 599px) {
        .container {
            padding: 0 16px;
        }

        .hero-content h1 {
            font-size: 1.5rem;
        }

        .section-title {
            font-size: 1.125rem;
        }

        .form-tabs {
            gap: 0.25rem;
            padding-bottom: 0.5rem;
        }

        .form-tab {
            padding: 0.5rem 0.75rem;
            font-size: 0.8125rem;
        }

        .template-grid {
            grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
            gap: 0.75rem;
        }

        .template-card {
            padding: 0.75rem;
        }
    }

    /* Small Mobile (< 480px) */
    @media screen and (max-width: 479px) {
        .container {
            padding: 0 12px;
        }

        .hero-section {
            padding: 1.5rem 0;
            margin-bottom: 1rem;
        }

        .hero-content h1 {
            font-size: 1.375rem;
            line-height: 1.3;
        }

        .hero-content p {
            font-size: 0.9375rem;
        }

        .features-bar {
            padding: 0.75rem;
            gap: 0.5rem;
            border-radius: var(--radius-md);
        }

        .feature-item {
            font-size: 0.75rem;
        }

        .feature-item svg {
            width: 16px;
            height: 16px;
        }

        .main-content {
            gap: 1rem;
        }

        .form-section,
        .preview-section {
            padding: 1rem;
            border-radius: var(--radius-md);
        }

        .section-title {
            font-size: 1rem;
            -webkit-box-orient: vertical;
            -webkit-box-direction: normal;
            -ms-flex-direction: column;
            flex-direction: column;
            -webkit-box-align: start;
            -ms-flex-align: start;
            align-items: flex-start;
            gap: 0.75rem;
        }

        .form-tabs {
            margin: 0 -1rem;
            padding: 0 1rem 0.5rem;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }

        .form-tab {
            padding: 0.5rem 0.625rem;
            font-size: 0.75rem;
            white-space: nowrap;
        }

        .form-group label {
            font-size: 0.875rem;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            padding: 0.625rem;
            font-size: 1rem; /* Prevent zoom on iOS */
        }

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

        .template-card {
            padding: 0.625rem;
        }

        .template-name {
            font-size: 0.6875rem;
        }

        .preview-controls {
            -webkit-box-orient: vertical;
            -webkit-box-direction: normal;
            -ms-flex-direction: column;
            flex-direction: column;
            gap: 0.5rem;
            width: 100%;
        }

        .preview-btn {
            width: 100%;
            -webkit-box-pack: center;
            -ms-flex-pack: center;
            justify-content: center;
        }

        .action-buttons {
            -webkit-box-orient: vertical;
            -webkit-box-direction: normal;
            -ms-flex-direction: column;
            flex-direction: column;
        }

        .btn {
            width: 100%;
            -webkit-box-pack: center;
            -ms-flex-pack: center;
            justify-content: center;
        }

        .toast-container {
            top: 10px;
            right: 10px;
            left: 10px;
            max-width: none;
        }

        .toast {
            padding: 12px 14px;
        }
    }

    /* ===== TOUCH DEVICE OPTIMIZATIONS ===== */
    @media (hover: none) and (pointer: coarse) {
        .btn,
        .form-tab,
        .template-card,
        .preview-btn {
            min-height: 44px;
            min-width: 44px;
        }

        .btn:hover,
        .form-tab:hover,
        .template-card:hover {
            -webkit-transform: none;
            -ms-transform: none;
            transform: none;
        }

        .btn:active,
        .form-tab:active,
        .template-card:active {
            -webkit-transform: scale(0.98);
            -ms-transform: scale(0.98);
            transform: scale(0.98);
        }

        /* Larger touch targets for inputs */
        .form-group input,
        .form-group select {
            min-height: 48px;
        }

        /* Better scrolling on touch devices */
        .template-grid,
        .form-tabs {
            -webkit-overflow-scrolling: touch;
        }
    }

    /* ===== HIGH CONTRAST MODE ===== */
    @media (prefers-contrast: high) {
        :root {
            --border-color: #000;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            border-width: 2px;
        }

        .btn {
            border-width: 3px;
        }

        .template-card.active {
            outline: 3px solid var(--primary-color);
        }
    }

    /* ===== REDUCED MOTION ===== */
    @media (prefers-reduced-motion: reduce) {
        *, *::before, *::after {
            -webkit-animation-duration: 0.01ms !important;
            animation-duration: 0.01ms !important;
            -webkit-animation-iteration-count: 1 !important;
            animation-iteration-count: 1 !important;
            -webkit-transition-duration: 0.01ms !important;
            -o-transition-duration: 0.01ms !important;
            transition-duration: 0.01ms !important;
            scroll-behavior: auto !important;
        }

        .hero-section::before {
            -webkit-animation: none;
            animation: none;
        }
    }

    /* ===== SAFARI-SPECIFIC FIXES ===== */
    @supports (-webkit-touch-callout: none) {
        .form-group input,
        .form-group select {
            font-size: 16px; /* Prevent zoom on focus in iOS */
        }

        .btn {
            -webkit-transform: translate3d(0, 0, 0);
        }

        /* Fix for Safari flexbox issues */
        .form-tabs {
            -webkit-flex-shrink: 0;
        }
    }

    /* ===== FIREFOX-SPECIFIC FIXES ===== */
    @-moz-document url-prefix() {
        .form-group select {
            -moz-appearance: none;
            text-indent: 0.01px;
            text-overflow: '';
        }

        /* Firefox scrollbar styling */
        * {
            scrollbar-width: thin;
            scrollbar-color: var(--gray-300) transparent;
        }
    }

    /* ===== IE11 / EDGE LEGACY FALLBACKS ===== */
    @media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {
        .main-content {
            display: -ms-grid;
            -ms-grid-columns: 1fr 2rem 1fr;
        }

        .form-section {
            -ms-grid-column: 1;
        }

        .preview-section {
            -ms-grid-column: 3;
        }

        .features-bar {
            display: -ms-flexbox;
        }
    }

    /* ===== LANDSCAPE ORIENTATION MOBILE ===== */
    @media screen and (max-height: 500px) and (orientation: landscape) {
        .hero-section {
            padding: 1rem 0;
        }

        .hero-content h1 {
            font-size: 1.5rem;
            margin-bottom: 0.5rem;
        }

        .hero-content p {
            display: none;
        }
    }

    /* ===== DARK MODE SUPPORT ===== */
    @media (prefers-color-scheme: dark) {
        :root {
            --light-bg: #0f172a;
            --white: #1e293b;
            --text-color: #f1f5f9;
            --text-muted: #94a3b8;
            --border-color: #334155;
            --gray-100: #1e293b;
            --gray-200: #334155;
        }

        .hero-section {
            background: linear-gradient(135deg, #0d4f4a 0%, #0a3d39 50%, #062926 100%);
        }

        .form-section,
        .preview-section,
        .features-bar {
            background: var(--white);
            border: 1px solid var(--border-color);
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            background: var(--gray-100);
            border-color: var(--border-color);
            color: var(--text-color);
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--primary-color);
        }

        .template-card {
            background: var(--gray-100);
            border-color: var(--border-color);
        }

        .toast {
            background: var(--white);
            border-color: var(--border-color);
        }
    }