/* --- RESET & GENERAL --- */
        * { box-sizing: border-box; margin: 0; padding: 0; outline: none; }
        body {
            font-family: 'Roboto', sans-serif;
            background-color: #f4f6f9;
            color: #333;
            height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* --- HEADER --- */
        .top-header {
            background-color: #005eb8;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            color: white;
            position: fixed;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 2px 5px rgba(0,0,0,0.1);
        }
        .header-left { display: flex; align-items: center; gap: 20px; } 
        
        /* Hamburger Menu Styles */
        .hamburger-menu { 
            font-size: 20px; 
            cursor: pointer; 
            transition: transform 0.2s;
            padding: 5px; 
        }
        .hamburger-menu:active { transform: scale(0.9); }

        .logo-container { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 24px; letter-spacing: -1px; }
        .logo-text-small { font-size: 14px; font-weight: 400; opacity: 0.9; margin-left: 5px; border-left: 1px solid rgba(255,255,255,0.3); padding-left: 10px; }
        .header-right { display: flex; gap: 20px; font-size: 14px; }
        .user-action { display: flex; align-items: center; gap: 8px; cursor: pointer; font-weight: 500; }
        .user-action i { font-size: 18px; }

        /* Clases auxiliares para controlar la vista Escritorio vs Movil */
        .mobile-only-header { display: none; } /* Oculto en PC */
        .desktop-only-header { display: flex; align-items: center; } /* Visible en PC */

        /* --- MAIN LAYOUT --- */
        .main-wrapper { display: flex; margin-top: 60px; height: calc(100vh - 60px); }

        /* --- SIDEBAR --- */
        .sidebar {
            width: 260px;
            background-color: white;
            border-right: 1px solid #e0e0e0;
            display: flex;
            flex-direction: column;
            flex-shrink: 0;
            transition: margin-left 0.3s ease, transform 0.3s ease; /* Transición agregada para móvil */
        }
        .sidebar.hidden { margin-left: -260px; } /* Oculto en PC */

        .sidebar-menu { list-style: none; margin-top: 20px; }
        .sidebar-menu li a {
            display: flex; align-items: center; padding: 15px 25px;
            text-decoration: none; color: #555; font-size: 13px; font-weight: 700;
            transition: background 0.2s; text-transform: uppercase;
        }
        .sidebar-menu li a i { width: 25px; margin-right: 10px; font-size: 16px; color: #666; }
        .sidebar-menu li.active a {
            background-color: #f0f2f5; color: #005eb8; border-left: 5px solid #005eb8; padding-left: 20px;
        }
        .sidebar-menu li.active a i { color: #005eb8; }
        .sidebar-menu li a:hover { background-color: #f9f9f9; }
        .sidebar-footer { margin-top: auto; padding: 20px; font-size: 11px; color: #888; border-top: 1px solid #eee; text-transform: uppercase; }

        /* --- CONTENT AREA --- */
        .content-area {
            flex-grow: 1;
            overflow-y: auto;
            background-color:#EFEFEF;
            display: flex;
            flex-direction: column;
            width: 100%; 
        }
        .page-title-strip {
            background-color: white; padding: 15px 30px; border-bottom: 2px solid #ffcc00; margin-bottom: 20px;
        }
        .page-title-strip h2 { font-size: 16px; color: #444; font-weight: 700; text-transform: uppercase; letter-spacing: 0.5px; }

        .white-panel {
            background-color: white;
            margin: 0 30px 30px 30px;
            padding: 40px;
            border-radius: 4px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            position: relative; 
        }

        .welcome-text {
            text-align: justify; font-size: 15px; line-height: 1.6; color: #282828; font-weight: 500;
            margin-bottom: 40px; max-width: 900px;
        }

        .form-container {
            display: flex;
            flex-direction: column;
            width: 100%;
            max-width: 550px;
        }

        /* --- CARDS (VISTA INICIAL) --- */
        .cards-container {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            margin-bottom: 50px;
            gap: 40px;
            width: 100%;
        }

        .card {
            border: 1px solid #dcdcdc;
            border-radius: 5px;
            width: 220px;
            padding: 30px 25px;
            display: flex;
            flex-direction: column;
            background-color: #F9F8F9;
            box-shadow: 0 0 3px 1px rgba(0, 0, 0, .5);
            position: relative;
            transition: transform 0.2s;
        }
        .card:hover { transform: translateY(-2px); }
        .card.card-small { height: 250px; }
        .card.card-tall { height: 280px; }
        .card-title { font-size: 16px; color: #444; margin-bottom: 5px; font-weight: 400; }
        .card-subtitle { font-size: 17px; color: #333; font-weight: 700; }
        .card-extra-info { font-size: 14px; color: #666; margin-top: 5px; line-height: 1.2;}

        .card-input {
            margin-top: 0;
            border: none;
            border-bottom: 1px solid #ccc;
            width: 100%;
            padding: 5px 0;
            font-size: 16px;
            color: #333;
            background: transparent;
            transition: border-color 0.3s;
        }
        .card-input:focus { border-bottom: 1px solid #005eb8; }

        /* --- ACTIONS (Recaptcha) --- */
        .bottom-actions {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            margin-top: 10px;
        }

        .recaptcha-box {
            background-color: #f9f9f9;
            border: 1px solid #d3d3d3;
            border-radius: 3px;
            width: 240px;
            height: 74px;
            display: flex;
            align-items: center;
            padding: 0 10px;
            box-shadow: 0 0 2px 1px rgba(0,0,0,0.05) inset;
            justify-content: space-between;
            user-select: none;
        }
        
        .recaptcha-left { display: flex; align-items: center; gap: 10px; }
        
        .checkbox-container {
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        .checkbox-fake {
            width: 24px;
            height: 24px;
            border: 2px solid #c1c1c1;
            border-radius: 2px;
            background: white;
            transition: all 0.2s;
        }

        .checkbox-fake:hover { border: 2px solid #b2b2b2; }

        .spinner {
            display: none;
            width: 26px;
            height: 26px;
            border: 4px solid #f3f3f3;
            border-top: 4px solid #4285f4; 
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        .checkmark {
            display: none;
            color: #0f9d58; 
            font-size: 28px;
        }

        @keyframes spin {
            0% { transform: rotate(0deg); }
            100% { transform: rotate(360deg); }
        }

        .recaptcha-text { font-size: 13px; font-weight: 400; color: #000; cursor: default; }
        .recaptcha-logo { display: flex; flex-direction: column; align-items: center; color: #555; }
        .recaptcha-icon { width: 28px; height: 28px; margin-bottom: 2px; }

        .btn-pagar {
            background-color: #002D64;
            color: white;
            border: none;
            padding: 2px 22px;
            font-size: 13px;
            font-weight: 700;
            border-radius: 4px;
            cursor: pointer;
            text-transform: uppercase;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
            height: 35px;
        }

        /* --- FACTURA VIEW --- */
        .full-loader-container {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100%;
            width: 100%;
            min-height: 400px;
        }
        .big-loader {
            width: 50px;
            height: 50px;
            border: 5px solid #f3f3f3;
            border-top: 5px solid #005eb8;
            border-radius: 50%;
            animation: spin 1s linear infinite;
        }

        .invoice-view {
            width: 100%;
            max-width: 100%;
            display: flex;
            flex-direction: column;
        }

        .invoice-header {
            width: 100%;
            border-bottom: 2px solid #FFCD00;
            padding-bottom: 10px;
            margin-bottom: 25px;
        }
        .invoice-header h3 {
            font-size: 16px;
            color: #444;
            text-transform: uppercase;
            font-weight: 700;
        }

        .invoice-form-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px 40px;
            width: 100%;
            margin-bottom: 40px;
            border-bottom: 1px solid #eee;
            padding-bottom: 30px;
        }

        .invoice-input-group { display: flex; flex-direction: column; }
        .invoice-label { font-size: 12px; color: #666; margin-bottom: 5px; font-weight: 500; }
        .invoice-label span { color: #d32f2f; } 

        .invoice-field {
            border: none;
            border-bottom: 1px solid #dcdcdc;
            padding: 5px 0;
            font-size: 14px;
            color: #333;
            background: transparent;
            width: 100%;
        }
        .invoice-field:focus { border-bottom-color: #005eb8; }
        
        .field-readonly { color: #888; }

        .required-note {
            grid-column: 3;
            text-align: right;
            font-size: 10px;
            color: #999;
            margin-top: -15px;
        }

        .payment-cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 30px;
        }

        .payment-card {
            background: #fff;
            border: 1px solid #ccc;
            border-radius: 4px;
            padding: 30px 20px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 250px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
            text-align: center;
        }

        .pay-card-title { font-size: 15px; color: #333; margin-bottom: 20px; font-weight: 500; }
        .pay-card-amount { font-size: 16px; color: #444; margin-bottom: 40px; font-weight: 400; }
        
        .pay-input-amount {
            border: none;
            border-bottom: 1px solid #ccc;
            text-align: center;
            width: 80%;
            font-size: 16px;
            margin-bottom: 40px;
            color: #888;
        }

        .btn-card-action {
            padding: 10px 20px;
            border: none;
            color: white;
            font-weight: 700;
            text-transform: uppercase;
            font-size: 13px;
            border-radius: 3px;
            cursor: pointer;
            width: 140px;
            box-shadow: 0 2px 5px rgba(0,0,0,0.2);
        }

        .btn-blue-dark { background-color: #002D64; }
        .btn-teal { background-color: #55bfae; } 
        .btn-blue-light { background-color: #1976D2; }

        .invoice-footer {
            border-top: 2px solid #FFCD00;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
        }

        .terms-check { display: flex; align-items: center; font-size: 12px; color: #555; gap: 10px; }
        .terms-check input[type="checkbox"] { transform: scale(1.5); margin-right: 5px; }
        .terms-check a { color: #4285f4; text-decoration: none; }
        .terms-check a:hover { text-decoration: underline; }

        .btn-cancel {
            background-color: white;
            border: 1px solid #ddd;
            padding: 8px 15px;
            font-size: 12px;
            font-weight: 700;
            color: #444;
            border-radius: 3px;
            cursor: pointer;
            box-shadow: 0 1px 2px rgba(0,0,0,0.1);
        }

        .footer-branding {
            margin-top: 40px;
            font-size: 11px;
            color: #888;
            text-align: center;
            width: 100%;
        }

        /* --- RESPONSIVE --- */
        @media (max-width: 768px) {
            .logo-text-small, .header-right { display: none; }
            
            /* Header Responsive */
            .desktop-only-header { display: none !important; }
            .top-header { justify-content: flex-start; padding-left: 15px; }
            .header-left { width: 100%; }
            .logo-container { width: 100%; }
            .mobile-only-header { display: flex !important; align-items: center; gap: 15px; width: 100%; }
            .hamburger-menu { display: block !important; font-size: 22px; margin: 0; }
            .mobile-brand-wrapper { display: flex; align-items: center; gap: 8px; }
            .icon-composite { position: relative; width: 30px; height: 30px; display: flex; align-items: center; justify-content: center; }
            .icon-composite .fa-calculator { font-size: 24px; color: white; }
            .icon-composite .fa-coins { position: absolute; font-size: 12px; color: #FFCD00; bottom: 2px; left: -4px; background-color: #005eb8; border-radius: 50%; padding: 1px; }
            .brand-text { font-family: 'Roboto', sans-serif; color: white; font-size: 20px; line-height: 1; display: flex; align-items: baseline; }
            .brand-text .bold { font-weight: 700; }
            .brand-text .light { font-weight: 300; opacity: 0.9; }

            /* --- SIDEBAR MOVIL (NUEVO) --- */
            /* Ya no usamos display: none */
            .sidebar {
                display: flex; 
                position: fixed;
                top: 60px; /* Debajo del header */
                left: 0;
                height: calc(100vh - 60px);
                width: 75%; /* Ancho adaptado para celular */
                max-width: 280px;
                z-index: 2000; /* Por encima del contenido */
                transform: translateX(-100%); /* Empieza oculto a la izquierda */
                transition: transform 0.3s ease;
                box-shadow: 2px 0 10px rgba(0,0,0,0.2);
                margin-left: 0; /* Reseteamos márgenes de PC */
            }
            
            /* Clase para mostrar el sidebar en móvil */
            .sidebar.mobile-open {
                transform: translateX(0);
            }

            /* Contenido y Paneles */
            .white-panel { margin: 10px; padding: 20px; }
            .cards-container { flex-direction: column; align-items: center; gap: 20px; }
            .card { width: 100%; max-width: 300px; height: auto !important; min-height: 200px;}
            .bottom-actions { flex-direction: column; gap: 20px; }
            .btn-pagar, .recaptcha-box { width: 100%; max-width: 300px; }

            /* Factura */
            .invoice-form-grid { grid-template-columns: 1fr; gap: 15px; }
            .required-note { grid-column: 1; text-align: left; margin-top: 0; margin-bottom: 10px;}
            .payment-cards-grid { grid-template-columns: 1fr; }
            .payment-card { height: auto; padding: 20px; }
            .invoice-footer { flex-direction: column; gap: 20px; align-items: flex-start; }
            .btn-cancel { align-self: flex-end; }
        }