:root {
            --primary: #0080C0;
            --primary-dark: #006BA0;
            --ev: #00C896;
            --fuel: #FF8C42;
            --savings: #8b5cf6;
            --danger: #ef4444;
            --warning: #f59e0b;
            --success: #10b981;
            
            --bg-base: #0a0f1e;
            --bg-card: #151b2e;
            --bg-card-hover: #1a2137;
            --bg-input: #0f1419;
            --border: rgba(255,255,255,0.1);
            --border-light: rgba(255,255,255,0.05);
            
            --text-1: #f8fafc;
            --text-2: #94a3b8;
            --text-3: #64748b;
            
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
            --shadow: 0 2px 8px rgba(0,0,0,0.4);
            --shadow-lg: 0 4px 16px rgba(0,0,0,0.5);
            
            --radius: 8px;
            --radius-lg: 12px;
            --transition: all 0.2s ease;
            
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
        }
        
        [data-theme="light"] {
            --bg-base: #f1f5f9;
            --bg-card: #ffffff;
            --bg-card-hover: #f8fafc;
            --bg-input: #f8fafc;
            --border: rgba(0,0,0,0.1);
            --border-light: rgba(0,0,0,0.05);
            --text-1: #0f172a;
            --text-2: #475569;
            --text-3: #94a3b8;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow: 0 2px 8px rgba(0,0,0,0.08);
            --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
        }
        
        * { margin: 0; padding: 0; box-sizing: border-box; }
        
        body {
            font-family: var(--font-main);
            background: var(--bg-base);
            color: var(--text-1);
            min-height: 100vh;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        
        .container {
            max-width: 1600px;
            margin: 0 auto;
            padding: 2rem 1.5rem;
        }
        
        /* Header */
        header {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 1.25rem 0;
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: var(--shadow-sm);
            margin-bottom: 2rem;
        }
        
        .header-content {
            max-width: 1600px;
            margin: 0 auto;
            padding: 0 1.5rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }
        
        .logo-section {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        
        .logo-icon {
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--primary), var(--savings));
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .logo-text h1 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-1);
        }
        
        .logo-text p {
            font-size: 0.8125rem;
            color: var(--text-3);
        }
        
        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }
        
        .header-btn {
            background: var(--bg-base);
            border: 1px solid var(--border);
            padding: 0.625rem 1rem;
            border-radius: var(--radius);
            color: var(--text-2);
            cursor: pointer;
            font-size: 0.875rem;
            font-weight: 600;
            transition: var(--transition);
        }
        
        .header-btn:hover {
            background: var(--bg-card-hover);
            color: var(--text-1);
            border-color: var(--primary);
            transform: translateY(-1px);
        }
        
        .user-info {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            background: var(--bg-base);
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }
        
        .user-avatar {
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--primary), var(--savings));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            overflow: hidden;
        }
        
        .user-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        
        .user-details h3 {
            font-size: 0.9375rem;
            font-weight: 600;
            color: var(--text-1);
        }
        
        .user-details p {
            font-size: 0.8125rem;
            color: var(--text-3);
        }
        
        #logoutBtn {
            background: transparent;
            border: 1px solid var(--border);
            padding: 0.625rem 1rem;
            border-radius: var(--radius);
            color: var(--text-2);
            cursor: pointer;
            font-size: 0.875rem;
            font-weight: 600;
            transition: var(--transition);
        }
        
        #logoutBtn:hover {
            background: rgba(239,68,68,0.1);
            border-color: var(--danger);
            color: var(--danger);
        }
        
        /* Ko-fi Donation Button */
        .kofi-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: #FF5E5B;
            color: #fff;
            border: none;
            padding: 0.625rem 1.15rem;
            border-radius: var(--radius);
            font-size: 0.875rem;
            font-weight: 700;
            text-decoration: none;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 2px 8px rgba(255,94,91,0.25);
            white-space: nowrap;
        }
        
        .kofi-btn:hover {
            filter: brightness(0.9);
            transform: scale(1.04) translateY(-1px);
            box-shadow: 0 4px 14px rgba(255,94,91,0.4);
        }
        
        .kofi-btn:active {
            transform: scale(0.97);
        }
        
        /* Login Screen */
        #loginScreen {
            position: fixed;
            inset: 0;
            background: var(--bg-base);
            z-index: 9999;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1.5rem;
        }
        
        #loginScreen.hidden { display: none; }
        
        .login-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            width: 100%;
            max-width: 420px;
            box-shadow: var(--shadow-lg);
        }
        
        .login-logo {
            text-align: center;
            margin-bottom: 2rem;
        }
        
        .login-logo-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary), var(--savings));
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 30px;
            margin: 0 auto 1rem;
        }
        
        .login-logo h1 {
            font-size: 2rem;
            font-weight: 900;
            color: #c8dde8;
            letter-spacing: 0.05em;
        }
        
        .login-logo p {
            font-size: 0.875rem;
            color: var(--text-3);
        }
        
        .login-tagline {
            font-size: 0.72rem;
            color: #c8dde8;
            letter-spacing: 0.18em;
            font-family: 'Courier New', monospace;
            margin-top: 0.35rem;
            opacity: 0.75;
            border-left: 2px solid #3ab4e0;
            padding-left: 0.5rem;
            display: inline-block;
        }
        
        .login-tabs {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            background: var(--bg-base);
            padding: 0.375rem;
            border-radius: var(--radius);
        }
        
        .login-tab {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0.625rem;
            border-radius: var(--radius);
            color: var(--text-2);
            font-weight: 600;
            font-size: 0.875rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .login-tab.active {
            background: var(--bg-card);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        
        .login-form-group {
            margin-bottom: 1rem;
        }
        
        .login-form-group label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-2);
            margin-bottom: 0.5rem;
        }
        
        .login-form-group input {
            width: 100%;
            background: var(--bg-input);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 0.75rem 1rem;
            color: var(--text-1);
            font-size: 0.9375rem;
            transition: var(--transition);
        }
        
        .login-form-group input:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(14,165,233,0.1);
        }
        
        .login-btn {
            width: 100%;
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0.875rem;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.9375rem;
            cursor: pointer;
            transition: var(--transition);
            margin-top: 1rem;
        }
        
        .login-btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
        }
        
        .login-divider {
            display: flex;
            align-items: center;
            gap: 1rem;
            margin: 1.5rem 0;
        }
        
        .login-divider::before,
        .login-divider::after {
            content: '';
            flex: 1;
            height: 1px;
            background: var(--border);
        }
        
        .login-divider span {
            font-size: 0.875rem;
            color: var(--text-3);
        }
        
        .google-btn {
            width: 100%;
            background: #fff;
            color: #1f2937;
            border: 1px solid var(--border);
            padding: 0.875rem;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.9375rem;
            cursor: pointer;
            transition: var(--transition);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.75rem;
        }
        
        .google-btn:hover {
            background: #f8fafc;
            transform: translateY(-1px);
        }
        
        .login-error {
            background: rgba(239,68,68,0.1);
            border: 1px solid rgba(239,68,68,0.3);
            border-radius: var(--radius);
            padding: 0.875rem;
            color: var(--danger);
            font-size: 0.875rem;
            margin-top: 1rem;
            display: none;
        }
        
        .login-error.visible { display: block; }
        
        /* Main App */
        #mainApp { display: none; }
        #mainApp.active { display: block; }
        
        /* Cards */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            margin-bottom: 2rem;
            box-shadow: var(--shadow-sm);
        }
        
        .section-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-light);
            flex-wrap: wrap;
            gap: 1rem;
        }
        
        .section-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-1);
        }
        
        .section-subtitle {
            font-size: 0.9375rem;
            color: var(--text-3);
            margin-top: 0.25rem;
        }
        
        /* Tabs */
        .tabs {
            display: flex;
            gap: 0.5rem;
            margin-bottom: 1.5rem;
            background: var(--bg-base);
            padding: 0.375rem;
            border-radius: var(--radius);
        }
        
        .tab-btn {
            flex: 1;
            background: transparent;
            border: none;
            padding: 0.75rem 1.5rem;
            border-radius: var(--radius);
            color: var(--text-2);
            font-weight: 600;
            font-size: 0.9375rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .tab-btn:hover {
            color: var(--text-1);
        }
        
        .tab-btn.active {
            background: var(--bg-card);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        
        /* Forms */
        .form-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 1rem;
            margin-bottom: 1.5rem;
        }
        
        .form-group {
            margin-bottom: 1rem;
        }
        
        .form-group label {
            display: block;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-2);
            margin-bottom: 0.5rem;
        }
        
        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            background: var(--bg-input);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 0.75rem 1rem;
            color: var(--text-1);
            font-size: 0.9375rem;
            font-family: var(--font-main);
            transition: var(--transition);
        }
        
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(14,165,233,0.1);
        }
        
        .form-hint {
            font-size: 0.8125rem;
            color: var(--text-3);
            margin-top: 0.375rem;
        }
        
        /* Preview Box */
        .preview-box {
            background: var(--bg-base);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.5rem;
            margin-top: 1.5rem;
        }
        
        .preview-title {
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--text-2);
            margin-bottom: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .preview-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 1rem;
        }
        
        .preview-item {
            background: var(--bg-card);
            padding: 1rem;
            border-radius: var(--radius);
            border: 1px solid var(--border-light);
        }
        
        .preview-label {
            font-size: 0.75rem;
            color: var(--text-3);
            margin-bottom: 0.5rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .preview-value {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-1);
        }
        
        .calc-explanation {
            background: var(--bg-base);
            border-left: 3px solid var(--primary);
            padding: 0.875rem;
            margin-top: 1rem;
            font-size: 0.875rem;
            color: var(--text-2);
            border-radius: var(--radius);
        }
        
        /* Buttons */
        .btn {
            background: var(--primary);
            color: #fff;
            border: none;
            padding: 0.875rem 1.5rem;
            border-radius: var(--radius);
            font-weight: 600;
            font-size: 0.9375rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: var(--shadow);
        }
        
        .btn-secondary {
            background: var(--bg-base);
            color: var(--text-1);
            border: 1px solid var(--border);
        }
        
        .btn-secondary:hover {
            background: var(--bg-card-hover);
            border-color: var(--primary);
        }
        
        .btn-danger {
            background: var(--danger);
        }
        
        .btn-danger:hover {
            background: #dc2626;
        }
        
        .btn-sm {
            padding: 0.5rem 1rem;
            font-size: 0.875rem;
        }
        
        .btn-full {
            width: 100%;
        }
        
        /* Stats Grid */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 1.5rem;
            margin-bottom: 2rem;
        }
        
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            transition: var(--transition);
        }
        
        .stat-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow);
            transform: translateY(-2px);
        }
        
        .stat-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1rem;
        }
        
        .stat-label {
            font-size: 0.875rem;
            color: var(--text-3);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .stat-icon {
            font-size: 1.5rem;
        }
        
        .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 0.5rem;
            line-height: 1;
        }
        
        .stat-subtitle {
            font-size: 0.875rem;
            color: var(--text-3);
        }
        
        .stat-detail {
            font-size: 0.8125rem;
            color: var(--text-2);
            margin-top: 0.75rem;
            padding-top: 0.75rem;
            border-top: 1px solid var(--border-light);
        }
        
        /* Table */
        .table-controls {
            display: flex;
            gap: 1rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }
        
        .search-box {
            flex: 1;
            min-width: 250px;
            position: relative;
        }
        
        .search-box input {
            width: 100%;
            background: var(--bg-input);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 0.75rem 1rem 0.75rem 2.75rem;
            color: var(--text-1);
            font-size: 0.9375rem;
        }
        
        .search-box::before {
            content: '🔍';
            position: absolute;
            left: 1rem;
            top: 50%;
            transform: translateY(-50%);
        }
        
        .filter-group {
            display: flex;
            gap: 0.5rem;
            background: var(--bg-base);
            padding: 0.375rem;
            border-radius: var(--radius);
        }
        
        .filter-btn {
            background: transparent;
            border: none;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            color: var(--text-2);
            font-weight: 600;
            font-size: 0.875rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .filter-btn.active {
            background: var(--bg-card);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        
        .table-container {
            overflow-x: auto;
            border-radius: var(--radius);
            border: 1px solid var(--border);
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
        }
        
        thead {
            background: var(--bg-base);
        }
        
        th {
            padding: 1rem;
            text-align: left;
            font-size: 0.8125rem;
            font-weight: 700;
            color: var(--text-2);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            border-bottom: 1px solid var(--border);
        }
        
        td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-light);
            font-size: 0.9375rem;
            color: var(--text-1);
        }
        
        tbody tr {
            transition: var(--transition);
        }
        
        tbody tr:hover {
            background: var(--bg-card-hover);
        }
        
        tbody tr:last-child td {
            border-bottom: none;
        }
        
        .table-actions {
            display: flex;
            gap: 0.5rem;
        }
        
        .icon-btn {
            background: transparent;
            border: 1px solid var(--border);
            padding: 0.5rem;
            border-radius: var(--radius);
            color: var(--text-2);
            cursor: pointer;
            font-size: 0.875rem;
            transition: var(--transition);
            min-width: 32px;
            height: 32px;
        }
        
        .icon-btn:hover {
            background: var(--bg-card-hover);
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-1px);
        }
        
        .icon-btn.delete:hover {
            border-color: var(--danger);
            color: var(--danger);
        }
        
        .badge {
            display: inline-block;
            padding: 0.25rem 0.75rem;
            border-radius: 9999px;
            font-size: 0.8125rem;
            font-weight: 600;
        }
        
        .badge.ev {
            background: rgba(16,185,129,0.15);
            color: var(--ev);
        }
        
        .badge.fuel {
            background: rgba(249,115,22,0.15);
            color: var(--fuel);
        }
        
        /* Charts */
        .chart-container {
            position: relative;
            height: 350px;
            margin-top: 1rem;
        }
        
        .chart-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
            gap: 2rem;
            margin: 2rem 0;
        }
        
        /* Modal */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.8);
            z-index: 1000;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 1.5rem;
            opacity: 0;
            pointer-events: none;
            transition: var(--transition);
        }
        
        .modal-overlay.active {
            opacity: 1;
            pointer-events: all;
        }
        
        .modal {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 2rem;
            max-width: 800px;
            width: 100%;
            max-height: 90vh;
            overflow-y: auto;
            box-shadow: var(--shadow-lg);
            transform: scale(0.95);
            transition: var(--transition);
        }
        
        .modal-overlay.active .modal {
            transform: scale(1);
        }
        
        .modal-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1.5rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-light);
        }
        
        .modal-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-1);
        }
        
        .modal-close {
            background: transparent;
            border: none;
            color: var(--text-2);
            cursor: pointer;
            font-size: 1.5rem;
            padding: 0.25rem;
            transition: var(--transition);
        }
        
        .modal-close:hover {
            color: var(--text-1);
            transform: scale(1.1);
        }
        
        /* Toast */
        #toast {
            position: fixed;
            bottom: 2rem;
            right: 2rem;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 1rem 1.5rem;
            box-shadow: var(--shadow-lg);
            z-index: 10000;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            min-width: 300px;
            transform: translateX(400px);
            transition: transform 0.3s ease;
        }
        
        #toast.show {
            transform: translateX(0);
        }
        
        #toast.success { border-left: 4px solid var(--success); }
        #toast.error { border-left: 4px solid var(--danger); }
        #toast.info { border-left: 4px solid var(--primary); }
        
        .toast-icon {
            font-size: 1.25rem;
        }
        
        .toast-message {
            flex: 1;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--text-1);
        }
        
        /* Empty State */
        .empty-state {
            text-align: center;
            padding: 4rem 2rem;
        }
        
        .empty-icon {
            font-size: 4rem;
            margin-bottom: 1.5rem;
            opacity: 0.5;
        }
        
        .empty-title {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-1);
            margin-bottom: 0.75rem;
        }
        
        .empty-text {
            font-size: 1rem;
            color: var(--text-3);
            margin-bottom: 2rem;
        }
        
        /* Period Selector */
        .period-selector {
            display: flex;
            gap: 0.5rem;
            background: var(--bg-base);
            padding: 0.375rem;
            border-radius: var(--radius);
            margin-bottom: 1.5rem;
        }
        
        .period-btn {
            background: transparent;
            border: none;
            padding: 0.5rem 1rem;
            border-radius: var(--radius);
            color: var(--text-2);
            font-weight: 600;
            font-size: 0.875rem;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .period-btn.active {
            background: var(--bg-card);
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        
        /* Utility Classes */
        .text-ev { color: var(--ev); }
        .text-fuel { color: var(--fuel); }
        .text-savings { color: var(--savings); }
        .text-danger { color: var(--danger); }
        .text-muted { color: var(--text-3); }
        
        .mb-2 { margin-bottom: 1rem; }
        .mb-3 { margin-bottom: 1.5rem; }
        .mt-2 { margin-top: 1rem; }
        
        .hidden { display: none !important; }
        
        /* Responsive */
        @media (max-width: 768px) {
            .header-content {
                flex-direction: column;
            }
            
            .user-info {
                order: -1;
                width: 100%;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .form-grid {
                grid-template-columns: 1fr;
            }
            
            .chart-grid {
                grid-template-columns: 1fr;
            }
            
            #toast {
                right: 1rem;
                left: 1rem;
                min-width: auto;
            }
        }
    
        /* ===== ANIMATIONS ===== */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }
        
        @keyframes slideIn {
            from { transform: translateX(-20px); opacity: 0; }
            to { transform: translateX(0); opacity: 1; }
        }
        
        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.7; }
        }
        
        @keyframes energyFlow {
            0% { stroke-dashoffset: 100; }
            100% { stroke-dashoffset: 0; }
        }
        
        @keyframes scaleIn {
            from { transform: scale(0.95); opacity: 0; }
            to { transform: scale(1); opacity: 1; }
        }
        
        /* Apply animations */
        .card {
            animation: fadeIn 0.4s ease-out;
        }
        
        .stat-card {
            animation: scaleIn 0.3s ease-out;
            animation-fill-mode: both;
        }
        
        .stat-card:nth-child(1) { animation-delay: 0.1s; }
        .stat-card:nth-child(2) { animation-delay: 0.2s; }
        .stat-card:nth-child(3) { animation-delay: 0.3s; }
        .stat-card:nth-child(4) { animation-delay: 0.4s; }
        
        .btn {
            position: relative;
            overflow: hidden;
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        .btn::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            width: 0;
            height: 0;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.2);
            transform: translate(-50%, -50%);
            transition: width 0.6s, height 0.6s;
        }
        
        .btn:active::before {
            width: 300px;
            height: 300px;
        }
        
        .logo-icon svg {
            animation: pulse 3s ease-in-out infinite;
        }
        
        .logo-icon svg path {
            stroke-dasharray: 200;
            stroke-dashoffset: 200;
            animation: energyFlow 2s ease-in-out infinite;
        }
        
        /* Smooth transitions for language switch */
        .fade-out {
            animation: fadeOut 0.2s ease-out;
        }
        
        @keyframes fadeOut {
            from { opacity: 1; }
            to { opacity: 0; }
        }
        
        /* Table row animations */
        table tbody tr {
            animation: slideIn 0.3s ease-out;
            animation-fill-mode: both;
        }
        
        table tbody tr:nth-child(1) { animation-delay: 0.05s; }
        table tbody tr:nth-child(2) { animation-delay: 0.1s; }
        table tbody tr:nth-child(3) { animation-delay: 0.15s; }
        table tbody tr:nth-child(4) { animation-delay: 0.2s; }
        table tbody tr:nth-child(5) { animation-delay: 0.25s; }
        
        /* Hover effects */
        .stat-card:hover {
            transform: translateY(-4px) scale(1.02);
            transition: all 0.3s ease;
        }
        
        .header-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 128, 192, 0.3);
        }
        
        /* Loading animation */
        .loading {
            display: inline-block;
            width: 20px;
            height: 20px;
            border: 3px solid rgba(0, 128, 192, 0.3);
            border-top-color: #0080C0;
            border-radius: 50%;
            animation: spin 0.8s linear infinite;
        }
        
        @keyframes spin {
            to { transform: rotate(360deg); }
        }
        
        /* Tab switch animation */
        .tab-content {
            animation: fadeIn 0.3s ease-out;
        }
        
        /* Toast animation */
        #toast {
            animation: slideInUp 0.3s ease-out;
        }
        
        @keyframes slideInUp {
            from { transform: translateY(100px); opacity: 0; }
            to { transform: translateY(0); opacity: 1; }
        }

/* =========================================
   ANIMAZIONI LOGIN (Ottimizzato - Option B)
   ========================================= */

/* 1. Sfondo Base */
.login-screen {
    background: radial-gradient(circle at center, #1a2236 0%, #0a0f1e 100%);
    overflow: hidden;
    position: relative;
    z-index: 1;
}

/* 2. Griglia 3D (Ottimizzata con will-change) */
.grid-overlay {
    position: absolute;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background-image: 
        linear-gradient(rgba(0, 128, 192, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 128, 192, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    transform: perspective(500px) rotateX(60deg);
    /* Ottimizzazione GPU */
    will-change: transform;
    animation: gridMove 20s linear infinite;
    z-index: -1;
    pointer-events: none;
}

@keyframes gridMove {
    0% { transform: perspective(500px) rotateX(60deg) translateY(0); }
    100% { transform: perspective(500px) rotateX(60deg) translateY(50px); }
}

/* 3. Sfere di luce (Orbs) */
.orb {
    position: absolute;
    border-radius: 50%;
    /* Blur ridotto per performance */
    filter: blur(60px); 
    opacity: 0.3; 
    z-index: -1;
    will-change: transform;
    animation: floatOrb 10s ease-in-out infinite;
}
.orb-1 {
    width: 250px; height: 250px;
    background: var(--primary);
    top: -10%; left: -10%;
}
.orb-2 {
    width: 200px; height: 200px;
    background: var(--ev);
    bottom: -10%; right: -10%;
    animation-delay: -5s;
}

@keyframes floatOrb {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(20px, 30px); }
}

/* 4. Logo e Animazioni */
.logo-wrapper {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hex-login-icon {
    z-index: 2;
    animation: hexPulse 3s ease-in-out infinite;
}

@keyframes hexPulse {
    0%, 100% { filter: drop-shadow(0 0 6px rgba(58,180,224,0.4)); }
    50% { filter: drop-shadow(0 0 14px rgba(58,180,224,0.7)); }
}

.pulse-ring {
    position: absolute;
    width: 100%; height: 100%;
    border-radius: 16%;
    border: 2px solid #3ab4e0;
    opacity: 0;
    will-change: transform, opacity;
    animation: pulseWave 3s cubic-bezier(0.215, 0.61, 0.355, 1) infinite;
}
.pulse-ring.delay {
    animation-delay: 1.5s;
}

@keyframes pulseWave {
    0% { transform: scale(0.8); opacity: 0.5; border-color: #3ab4e0; }
    100% { transform: scale(2.0); opacity: 0; border-color: #0878b8; }
}

/* 5. Bottone Google */
.google-btn {
    background: white !important;
    color: #333 !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    transition: transform 0.2s;
}
.google-btn:hover {
    transform: translateY(-2px);
}

.typing-text {
    font-size: 1rem;
    color: #8aa0b4;
    letter-spacing: 1.5px;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

/* =========================================
   OTTIMIZZAZIONI MOBILE & PERFORMANCE (Option B)
   ========================================= */

/* Su schermi piccoli (Mobile) */
@media (max-width: 768px) {
    .grid-overlay {
        /* Rimuovi animazione griglia pesante su mobile */
        display: none; 
    }
    .orb {
        /* Riduci blur e dimensioni per salvare GPU */
        filter: blur(40px);
        opacity: 0.2;
        animation: none; /* Ferma il movimento delle sfere */
    }
    .pulse-ring {
        /* Semplifica pulsazione */
        border-width: 1px;
    }
}

/* Rispetto preferenze utente (Accessibilità) */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
    .grid-overlay { display: none; }
}

/* =========================================
   AUTH FORMS (Login/Registrazione)
   ========================================= */

.auth-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.5rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    padding: 4px;
}

.auth-tab {
    flex: 1;
    padding: 0.75rem 1rem;
    background: transparent;
    border: none;
    color: rgba(255, 255, 255, 0.6);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 6px;
}

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

.auth-tab:hover:not(.active) {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
}

.auth-form {
    display: none;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.auth-form.active {
    display: flex;
}

.auth-form input {
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    transition: all 0.3s;
}

.auth-form input:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.auth-form input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

.auth-btn {
    padding: 1rem;
    background: var(--primary);
    border: none;
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.auth-btn:hover {
    background: #00b8e6;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 212, 255, 0.3);
}

.auth-btn:active {
    transform: translateY(0);
}

.auth-divider {
    position: relative;
    text-align: center;
    margin: 1.5rem 0;
}

.auth-divider::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    width: 100%;
    height: 1px;
    background: rgba(255, 255, 255, 0.2);
}

.auth-divider span {
    position: relative;
    background: #1a2236;
    padding: 0 1rem;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
}


/* =========================================
   GOOGLE BUTTON - SMALLER SIZE
   ========================================= */

.google-btn {
    background: white !important;
    color: #333 !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    transition: transform 0.2s;
    /* SMALLER SIZE */
    padding: 0.75rem 1.5rem !important;
    font-size: 0.95rem !important;
    max-width: 280px;
    margin: 0 auto;
}

.google-btn img {
    /* SMALLER ICON */
    width: 20px !important;
    height: 20px !important;
}

/* =========================================
   LOGIN FOOTER - STYLED
   ========================================= */

.login-footer {
    margin-top: 2rem;
    font-size: 1rem;
    font-weight: 500;
    color: transparent;
    background: linear-gradient(135deg, var(--primary) 0%, var(--ev) 50%, #00d4ff 100%);
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.3);
    letter-spacing: 1px;
    animation: shimmer 3s ease-in-out infinite;
}

@keyframes shimmer {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.8; }
}


/* =========================================
   LEGAL FOOTER
   ========================================= */

.legal-footer {
    background: rgba(10, 15, 30, 0.95);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 1.5rem 1rem 1rem;
    margin-top: 3rem;
    text-align: center;
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
}

.legal-links {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.legal-link {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s, text-shadow 0.3s;
    font-size: 0.875rem;
    padding: 0.25rem 0.5rem;
}

.legal-link:hover {
    color: var(--primary);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.legal-separator {
    color: rgba(255, 255, 255, 0.3);
    margin: 0 0.25rem;
}

.legal-disclaimer {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin: 1rem 0;
    padding: 0.75rem 1rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.disclaimer-icon {
    font-size: 1.2rem;
    cursor: help;
}

.disclaimer-text {
    line-height: 1.5;
}

.legal-copyright {
    margin-top: 1rem;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 0.5px;
}

/* Responsive Legal Footer */
@media (max-width: 768px) {
    .legal-footer {
        padding: 1rem 0.75rem 0.75rem;
        font-size: 0.8rem;
    }
    
    .legal-links {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .legal-separator {
        display: none;
    }
    
    .legal-disclaimer {
        flex-direction: column;
        text-align: center;
        padding: 0.5rem 0.75rem;
        font-size: 0.75rem;
    }
    
    .legal-link {
        padding: 0.5rem;
        font-size: 0.85rem;
    }
}

/* Iubenda Link Styling */
.iubenda-white {
    color: rgba(255, 255, 255, 0.7) !important;
}

.iubenda-white:hover {
    color: var(--primary) !important;
}


/* =========================================
   LOGIN FOOTER LEGAL
   ========================================= */

.login-footer-legal {
    margin-top: 2rem;
    text-align: center;
}

.login-footer-legal .copyright {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 0.75rem;
}

.login-footer-legal .legal-links {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.login-footer-legal .legal-link,
.login-footer-legal .iubenda-white {
    color: rgba(255, 255, 255, 0.7) !important;
    text-decoration: none;
    transition: color 0.3s;
}

.login-footer-legal .legal-link:hover,
.login-footer-legal .iubenda-white:hover {
    color: var(--primary) !important;
}

.login-footer-legal .separator {
    color: rgba(255, 255, 255, 0.3);
}

/* SEO Text in Login */
.login-seo-text h2 {
    font-weight: 600;
}

.login-seo-text strong {
    color: var(--primary);
}

@media (max-width: 768px) {
    .login-footer-legal .legal-links {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .login-footer-legal .separator {
        display: none;
    }
    
    .login-seo-text {
        margin-top: 2rem !important;
    }
    
    .login-seo-text h2 {
        font-size: 0.9rem !important;
    }
    
    .login-seo-text p {
        font-size: 0.8rem !important;
    }
}

/* ===== ONBOARDING TOUR ===== */
#onboardingBackdrop {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 9000;
    backdrop-filter: blur(4px);
}

#onboardingBox {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 9001;
    background: var(--bg-card);
    border: 1px solid rgba(0,128,192,0.4);
    border-radius: 16px;
    padding: 2rem;
    width: min(480px, calc(100vw - 2rem));
    box-shadow: 0 8px 48px rgba(0,0,0,0.6), 0 0 0 1px rgba(0,128,192,0.2);
    animation: slideUpFade 0.35s ease;
}

@keyframes slideUpFade {
    from { opacity: 0; transform: translateX(-50%) translateY(20px); }
    to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

#onboardingProgress {
    display: flex;
    gap: 6px;
    margin-bottom: 1.25rem;
}

.onb-dot {
    height: 4px;
    flex: 1;
    border-radius: 2px;
    background: var(--border);
    transition: background 0.3s;
}

.onb-dot.active {
    background: var(--primary);
}

#onboardingStep .onb-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
    display: block;
}

#onboardingStep h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-1);
}

#onboardingStep p {
    font-size: 0.9375rem;
    color: var(--text-2);
    line-height: 1.6;
}

#onboardingActions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 1.5rem;
    gap: 1rem;
}

#onboardingSkip {
    background: transparent;
    border: none;
    color: var(--text-3);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.5rem;
}

#onboardingSkip:hover { color: var(--text-2); }

#onboardingNext {
    background: linear-gradient(135deg, var(--primary), #0ea5e9);
    border: none;
    color: #fff;
    font-size: 0.9375rem;
    font-weight: 700;
    padding: 0.75rem 1.75rem;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 4px 16px rgba(0,128,192,0.4);
}

#onboardingNext:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(0,128,192,0.5);
}

/* ===== PWA INSTALL PROMPT ===== */
#pwaPrompt {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    z-index: 8000;
    animation: slideInRight 0.4s ease;
}

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

#pwaPromptInner {
    background: var(--bg-card);
    border: 1px solid rgba(0,128,192,0.3);
    border-radius: 16px;
    padding: 1.5rem;
    width: 280px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
    text-align: center;
}

#pwaPromptInner strong {
    display: block;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 0.375rem;
}

#pwaPromptInner p {
    font-size: 0.8125rem;
    color: var(--text-2);
    line-height: 1.5;
}

#pwaInstallBtn {
    background: var(--primary);
    border: none;
    color: #fff;
    font-size: 0.875rem;
    font-weight: 700;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

#pwaInstallBtn:hover { background: var(--primary-dark); }

#pwaDismissBtn {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-3);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.625rem 1.25rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

#pwaDismissBtn:hover { color: var(--text-2); border-color: var(--text-3); }

/* Highlight element during tour */
.onb-highlight {
    position: relative;
    z-index: 9002 !important;
    box-shadow: 0 0 0 4px rgba(0,128,192,0.6), 0 0 0 8px rgba(0,128,192,0.2) !important;
    border-radius: 8px;
}


/* ===== CUSTOM CONFIRM MODAL ===== */
.hidden-confirm {
    display: none !important;
}
#confirmModal {
    animation: fadeInModal 0.15s ease;
}
#confirmModal > div {
    animation: slideUpFade 0.18s ease;
}
#confirmOk, #confirmCancel {
    transition: opacity 0.15s, transform 0.1s;
}
#confirmOk:hover { opacity: 0.88; transform: translateY(-1px); }
#confirmCancel:hover { background: var(--bg-hover) !important; }

/* ===== ACCESSIBILITY ===== */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}
.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
    overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
@media (max-width: 768px) {
    .icon-btn { min-width: 44px; min-height: 44px; }
}