:root {
        --bg-color: #0a0a0a;
        --card-bg: rgba(25, 25, 25, 0.65);
        --text-color: #e0e0e0;
        --neon-green: #39FF14;
        --neon-purple: #BF00FF;
        --border-color: rgba(255, 255, 255, 0.08);
        --glass-border: rgba(255, 255, 255, 0.1);
        --whatsapp-color: #25D366;
        --pdf-bg: #ffffff;
        --pdf-text: #222222;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Poppins', sans-serif; }
    body {
        background-color: var(--bg-color);
        background-image: radial-gradient(circle at 15% 50%, rgba(57, 255, 20, 0.03), transparent 25%),
                          radial-gradient(circle at 85% 30%, rgba(191, 0, 255, 0.03), transparent 25%);
        color: var(--text-color); padding: 30px 20px; min-height: 100vh;
    }

    .main-header { text-align: center; margin-bottom: 40px; }
    .main-header h1 { color: #fff; text-transform: uppercase; letter-spacing: 6px; font-weight: 700; font-size: 2.5rem; }
    .main-header span { color: var(--neon-green); }

    h2 { color: #fff; margin-bottom: 20px; font-size: 1.1rem; font-weight: 500; letter-spacing: 1px; display: flex; align-items: center; gap: 10px; }
    h2::before { content: ""; display: inline-block; width: 8px; height: 24px; background: linear-gradient(to bottom, var(--neon-purple), var(--neon-green)); border-radius: 4px; }

    .container { max-width: 1100px; margin: 0 auto; display: grid; grid-template-columns: 1fr; gap: 25px; }
    @media (min-width: 850px) { .container { grid-template-columns: 1fr 1fr; } .full-width { grid-column: 1 / -1; } }
    .two-col-grid { display: grid; grid-template-columns: 1fr; gap: 20px; }
    @media (min-width: 768px) { .two-col-grid { grid-template-columns: 1fr 1fr; gap: 40px; } }

    .card { background-color: var(--card-bg); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-radius: 16px; padding: 30px; box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3); border: 1px solid var(--glass-border); transition: transform 0.3s ease, box-shadow 0.3s ease; }
    .card:hover { border-color: rgba(255,255,255,0.15); box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5); }

    .table-responsive { overflow-x: auto; }
    .dark-table { width: 100%; border-collapse: collapse; margin-bottom: 20px; }
    .dark-table th, .dark-table td { padding: 12px 10px; text-align: left; border-bottom: 1px solid var(--border-color); font-size: 0.95rem; }
    .dark-table th { color: #888; font-weight: 500; text-transform: uppercase; font-size: 0.8rem; letter-spacing: 1px; }

    input[type="text"], input[type="number"], input[type="tel"], input[type="file"] { width: 100%; background-color: rgba(0, 0, 0, 0.3); border: 1px solid var(--border-color); color: white; padding: 10px 12px; border-radius: 8px; outline: none; transition: all 0.3s ease; font-family: inherit; }
    input:focus { border-color: var(--neon-green); background-color: rgba(0, 0, 0, 0.5); box-shadow: 0 0 10px rgba(57, 255, 20, 0.1); }
    .form-group { margin-bottom: 20px; }
    .form-group label { display: block; margin-bottom: 8px; color: #aaa; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.5px; }

    .btn { background-color: transparent; color: var(--text-color); border: 1px solid; padding: 12px 20px; cursor: pointer; border-radius: 8px; font-weight: 500; letter-spacing: 1px; transition: all 0.3s ease; font-size: 0.9rem; display: inline-flex; align-items: center; justify-content: center; gap: 8px; }
    .btn-green { border-color: rgba(57, 255, 20, 0.5); color: var(--neon-green); }
    .btn-green:hover { background-color: rgba(57, 255, 20, 0.1); border-color: var(--neon-green); box-shadow: 0 0 20px rgba(57, 255, 20, 0.2); }
    .btn-purple { border-color: var(--neon-purple); color: #fff; background: linear-gradient(45deg, rgba(191, 0, 255, 0.2), transparent); width: 100%; margin-top: 10px; }
    .btn-purple:hover { background: var(--neon-purple); box-shadow: 0 0 20px rgba(191, 0, 255, 0.4); border-color: var(--neon-purple); }
    .btn-whatsapp { border-color: var(--whatsapp-color); color: #fff; background: var(--whatsapp-color); }
    .btn-whatsapp:hover { background: #1da851; box-shadow: 0 0 20px rgba(37, 211, 102, 0.4); border-color: #1da851; }
    .btn-remove { color: #ff4757; background: none; border: none; font-size: 1.2rem; cursor: pointer; width: 100%; transition: transform 0.2s; }
    .btn-remove:hover { transform: scale(1.2); }

    .checkbox-group { display: flex; align-items: center; gap: 15px; margin-top: 20px; background: rgba(57, 255, 20, 0.05); padding: 15px; border-radius: 8px; border: 1px solid rgba(57, 255, 20, 0.2); }
    .checkbox-group label { color: #fff; font-weight: 500; font-size: 0.95rem; margin: 0; cursor: pointer; }
    input[type="checkbox"] { width: 20px; height: 20px; accent-color: var(--neon-green); cursor: pointer; }
    .igv-input-container { display: flex; align-items: center; gap: 5px; }
    .igv-input-container input[type="number"] { width: 70px; padding: 6px; text-align: center; }

    .totals-box { background: rgba(0, 0, 0, 0.2); border: 1px solid var(--border-color); border-radius: 12px; padding: 20px; height: 100%; display: flex; flex-direction: column; justify-content: center; }
    .total-row { display: flex; justify-content: space-between; margin-bottom: 12px; font-size: 1.05rem; color: #bbb; }
    .total-final { color: #fff; font-size: 1.4rem; font-weight: 600; margin-top: 15px; background: rgba(255,255,255,0.05); padding: 15px; border-radius: 8px; border-left: 4px solid var(--neon-green); }
    .total-final span:last-child { color: var(--neon-green); }
    .currency::before { content: "S/ "; font-weight: 300; opacity: 0.8; }
    
    /* Acordeón de Proyectos Mejorado */
    .accordion { margin-bottom: 15px; }
    .accordion-header { 
        padding: 15px 25px; 
        display: flex; 
        justify-content: space-between; 
        align-items: center; 
        background: linear-gradient(90deg, rgba(35,35,35,0.9), rgba(20,20,20,0.9)); 
        border: 1px solid var(--glass-border);
        border-radius: 10px;
        cursor: pointer; 
        transition: all 0.2s; 
        box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    }
    .accordion-header:hover { 
        background: linear-gradient(90deg, rgba(45,45,45,0.9), rgba(30,30,30,0.9)); 
        border-color: rgba(57, 255, 20, 0.5); 
        transform: translateY(-2px); 
    }
    .accordion-header h3 { margin: 0; font-size: 1.1rem; color: #fff; font-weight: 500; pointer-events: none; }
    .accordion-content { 
        background: rgba(0,0,0,0.2); 
        padding: 25px; 
        display: none; 
        border: 1px solid var(--glass-border); 
        border-top: none; 
        border-radius: 0 0 10px 10px; 
        margin-top: -5px; 
    }
    .accordion-content.active { display: block; }

    /* MODAL Y DISEÑO DEL DOCUMENTO PDF */
    .modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.85); backdrop-filter: blur(5px); z-index: 1000; overflow-y: auto; padding: 40px 20px; }
    .modal-overlay.active { display: block; }
    
    .quote-document { 
        background: var(--pdf-bg); 
        color: var(--pdf-text); 
        max-width: 700px; 
        margin: 0 auto; 
        padding: 40px 50px; 
        border-radius: 12px; 
        position: relative; 
        box-shadow: 0 20px 50px rgba(0,0,0,0.5); 
    }

    /* DISEÑO ESTRICTO A4 PARA REPORTE INTERNO (SIN DESBORDAR A 2DA HOJA) */
    .internal-document {
        background: var(--pdf-bg);
        color: var(--pdf-text);
        width: 210mm;
        height: 295mm;
        max-height: 295mm;
        margin: 0 auto;
        padding: 8mm 12mm;
        border-radius: 8px;
        position: relative;
        box-shadow: 0 20px 50px rgba(0,0,0,0.5);
        font-size: 9.5px;
        overflow: hidden;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }

    .modal-actions { display: flex; justify-content: flex-end; gap: 15px; margin-bottom: 30px; flex-wrap: wrap; }
    .btn-close { position: absolute; top: 15px; right: 20px; font-size: 28px; cursor: pointer; color: #888; background: none; border: none; transition: color 0.2s; }
    .btn-close:hover { color: #000; }
    
    .doc-header { display: flex; justify-content: space-between; align-items: flex-start; border-bottom: 2px solid #eee; padding-bottom: 8px; margin-bottom: 8px; }
    .doc-logo img { max-width: 150px; max-height: 70px; object-fit: contain; }
    .doc-logo .text-logo { font-size: 1.5rem; font-weight: 700; color: #111; letter-spacing: 2px; }
    .doc-title { text-align: right; }
    .doc-title h2 { color: #111; border: none; font-size: 1.8rem; font-weight: 300; letter-spacing: 2px; margin-bottom: 5px; justify-content: flex-end; }
    .doc-title h2::before { display: none; }
    .doc-title p { color: #666; font-size: 0.85rem; }
    
    .doc-entities { display: flex; justify-content: space-between; margin-bottom: 20px; }
    .doc-entity { width: 45%; }
    .doc-entity h3 { margin-bottom: 5px; font-size: 0.75rem; color: #999; text-transform: uppercase; letter-spacing: 1px; font-weight: 500; }
    .doc-entity strong { font-size: 1rem; color: #222; display: block; margin-bottom: 2px; }
    .doc-entity span { color: #555; font-size: 0.85rem; }
    
    .doc-table { width: 100%; border-collapse: collapse; margin-bottom: 20px; }
    .doc-table th { background-color: #e2e2e2 !important; color: #222 !important; padding: 8px 10px; font-weight: 600; border: 1px solid #ccc; text-align: center; font-size: 0.75rem; }
    .doc-table td { border: 1px solid #ddd; padding: 6px 10px; color: #333; text-align: center; font-size: 0.8rem; }
    .doc-table td:first-child, .doc-table th:first-child { text-align: left; }

    /* Estilos ultra compactos para reporte interno estricto en 1 sola hoja */
    .internal-table { width: 100%; border-collapse: collapse; margin-bottom: 2px; }
    .internal-table th { background-color: #eaeaea !important; color: #111 !important; padding: 2px 4px; font-weight: 600; border: 1px solid #ccc; text-align: center; font-size: 9px; }
    .internal-table td { border: 1px solid #ddd; padding: 1.5px 4px; color: #333; text-align: center; font-size: 9px; }
    .internal-table td:first-child, .internal-table th:first-child { text-align: left; }
    
    .doc-summary { width: 320px; margin-left: auto; background: #fdfdfd; padding: 15px; border-radius: 8px; border: 1px solid #eee; }
    .doc-summary-row { display: flex; justify-content: space-between; padding: 6px 0; color: #555; font-size: 0.9rem; }
    .doc-summary-total { font-size: 1.2rem; font-weight: 600; color: #000; border-top: 2px solid #222; padding-top: 10px; margin-top: 5px; }
    .doc-footer { margin-top: 5px; border-top: 1px solid #eee; padding-top: 5px; color: #888; font-size: 8px; text-align: center; }

    /* Resumen compacto para interno ajustado */
    .internal-summary { width: 260px; margin-left: auto; background: #f9f9f9; padding: 6px 10px; border-radius: 6px; border: 1px solid #ddd; margin-top: 4px; }
    .internal-summary-row { display: flex; justify-content: space-between; padding: 1.5px 0; color: #444; font-size: 9.5px; }
    .internal-summary-total { font-size: 11px; font-weight: 700; color: #000; border-top: 1px solid #222; padding-top: 3px; margin-top: 2px; }