:root {
    --primary: #4F46E5;
    --primary-light: #EEF2FF;
    --primary-dark: #3730A3;
    --accent: #06B6D4;
    --text-dark: #0F172A;
    --text-muted: #64748B;
    --border-color: #E2E8F0;
    --bg-page: #F8FAFC;
    --card-bg: #FFFFFF;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --shadow-card: 0 12px 35px -5px rgba(0,0,0,0.07), 0 4px 6px -2px rgba(0,0,0,0.03);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-dark);
    line-height: 1.5;
}

body.rtl, [dir="rtl"] {
    direction: rtl;
    font-family: 'Tajawal', system-ui, -apple-system, sans-serif;
}

/* Header Navbar */
.app-navbar {
    background: #0B0F19;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    padding: 0.9rem 1.5rem;
    position: sticky;
    top: 0;
    z-index: 1000;
}
.nav-wrap {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
}
.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    font-size: 1.35rem;
    font-weight: 800;
    color: #ffffff;
    letter-spacing: -0.02em;
}
.brand-icon-box {
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    color: white;
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    box-shadow: 0 4px 14px rgba(79, 70, 229, 0.4);
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.nav-links a {
    color: #94A3B8;
    text-decoration: none;
    font-size: 0.92rem;
    font-weight: 600;
    transition: color .2s;
}
.nav-links a:hover, .nav-links a.active {
    color: #ffffff;
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.6rem 1.15rem;
    font-size: 0.88rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all .2s;
    border: 1px solid transparent;
}
.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.35);
}
.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
}
.btn-outline {
    background: transparent;
    color: #CBD5E1;
    border-color: rgba(255,255,255,0.2);
}
.btn-outline:hover {
    background: rgba(255,255,255,0.06);
    color: white;
    border-color: rgba(255,255,255,0.4);
}
.lang-toggle {
    background: rgba(255,255,255,0.08);
    color: #F8FAFC;
    border: 1px solid rgba(255,255,255,0.15);
    padding: 0.55rem 0.9rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    transition: all .2s;
}
.lang-toggle:hover {
    background: rgba(255,255,255,0.18);
}

/* Modern Hero Header */
.hero-header {
    text-align: center;
    padding: 3.5rem 1.5rem 2rem;
    max-width: 900px;
    margin: 0 auto;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #EEF2FF;
    color: #4338CA;
    padding: 0.35rem 0.9rem;
    border-radius: 999px;
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}
.hero-title {
    font-size: 2.75rem;
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: 1rem;
    color: #0F172A;
}
.gradient-text {
    background: linear-gradient(135deg, #4F46E5, #06B6D4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 680px;
    margin: 0 auto;
}

/* Toolbar Strip */
.toolbar-strip {
    background: white;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
    padding: 0.85rem 1.5rem;
    position: sticky;
    top: 65px;
    z-index: 900;
    box-shadow: 0 4px 12px rgba(0,0,0,0.03);
}
.toolbar-wrap {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}
.control-group {
    display: flex;
    align-items: center;
    gap: 0.65rem;
}
.control-label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-muted);
}
.select-input {
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text-dark);
    background: #F8FAFC;
    outline: none;
    cursor: pointer;
}
.color-picker-wrap {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.color-dot {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform .15s;
    border: 2px solid white;
    box-shadow: 0 0 0 1px #CBD5E1;
}
.color-dot:hover { transform: scale(1.15); }
.color-dot.active {
    box-shadow: 0 0 0 2px #4F46E5;
    transform: scale(1.15);
}

/* Main Workspace */
.app-container {
    max-width: 1280px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* AdSense Container */
.adsense-box {
    background: #FAFAFA;
    border: 2px dashed #E2E8F0;
    border-radius: var(--radius-md);
    margin: 2rem auto;
    padding: 1rem;
    text-align: center;
    min-height: 90px;
    max-width: 900px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.adsense-tag {
    font-size: 0.68rem;
    letter-spacing: 1.5px;
    color: #94A3B8;
    text-transform: uppercase;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

/* The Invoice Paper Canvas */
.invoice-paper-wrapper {
    max-width: 820px;
    margin: 0 auto;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-color);
    padding: 2.5rem 2.75rem;
    position: relative;
    box-sizing: border-box;
}

/* Top Row */
.inv-top-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 1.75rem;
    align-items: start;
}
.logo-upload-box {
    border: 2px dashed #CBD5E1;
    border-radius: var(--radius-md);
    padding: 0.75rem;
    width: 160px;
    height: 85px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: center;
    transition: all .2s;
    position: relative;
    overflow: hidden;
    background: #FAFAFA;
}
.logo-upload-box:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}
.logo-img-preview {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}
.logo-remove-btn {
    position: absolute;
    top: 4px;
    right: 4px;
    background: rgba(0,0,0,0.65);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 11px;
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
}
.logo-upload-box:hover .logo-remove-btn {
    display: flex;
}

.inv-title-col {
    text-align: right;
}
body.rtl .inv-title-col, [dir="rtl"] .inv-title-col {
    text-align: left !important;
}
.inv-main-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--primary);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 0.75rem;
    outline: none;
}
.inv-meta-grid {
    display: inline-grid;
    grid-template-columns: auto auto;
    gap: 0.35rem 0.85rem;
    text-align: right;
    font-size: 0.88rem;
}
body.rtl .inv-meta-grid, [dir="rtl"] .inv-meta-grid {
    text-align: left !important;
}
.inv-meta-label {
    font-weight: 700;
    color: var(--text-muted);
}

/* Parties Row */
.inv-parties-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 1.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border-color);
}
.party-col h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary);
    margin-bottom: 0.5rem;
    font-weight: 800;
}
.party-col .party-name {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-dark);
}
.party-col input {
    margin-bottom: 0.25rem;
    font-size: 0.85rem;
}

/* Items Table */
.inv-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
    table-layout: auto;
}
.inv-table th {
    background: var(--primary);
    color: white;
    padding: 0.65rem 0.85rem;
    font-size: 0.82rem;
    font-weight: 700;
    text-align: left;
    letter-spacing: 0.5px;
}
body.rtl .inv-table th, [dir="rtl"] .inv-table th {
    text-align: right;
}
.inv-table th:first-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }
.inv-table th:last-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
body.rtl .inv-table th:first-child, [dir="rtl"] .inv-table th:first-child { border-radius: 0 var(--radius-sm) var(--radius-sm) 0; }
body.rtl .inv-table th:last-child, [dir="rtl"] .inv-table th:last-child { border-radius: var(--radius-sm) 0 0 var(--radius-sm); }

.inv-table td {
    padding: 0.6rem 0.85rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.88rem;
    vertical-align: middle;
}
.item-desc-input {
    width: 100%;
    font-weight: 600;
    font-size: 0.9rem;
    border: none;
    outline: none;
    background: transparent;
}
.item-qty-input, .item-price-input {
    width: 85px;
    padding: 0.3rem 0.45rem;
    border: 1px solid transparent;
    border-radius: 4px;
    font-size: 0.88rem;
    outline: none;
    font-family: inherit;
}
body:not(.rtl) .item-qty-input { text-align: center; }
body:not(.rtl) .item-price-input { text-align: right; }
body.rtl .item-qty-input, [dir="rtl"] .item-qty-input { text-align: center; }
body.rtl .item-price-input, [dir="rtl"] .item-price-input { text-align: left; }

.item-qty-input:hover, .item-price-input:hover,
.item-qty-input:focus, .item-price-input:focus {
    border-color: #CBD5E1;
}
.item-amount-display {
    font-weight: 700;
    color: var(--text-dark);
    display: inline-block;
}
body:not(.rtl) .item-amount-display { text-align: right; }
body.rtl .item-amount-display, [dir="rtl"] .item-amount-display { text-align: left; }

.btn-delete-row {
    background: none;
    border: none;
    color: #CBD5E1;
    cursor: pointer;
    font-size: 0.9rem;
    transition: color .2s;
    padding: 0.3rem;
}
.btn-delete-row:hover { color: #EF4444; }

.btn-add-item {
    background: var(--primary-light);
    color: var(--primary);
    border: 1px dashed var(--primary);
    padding: 0.55rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all .2s;
    margin-bottom: 1.5rem;
}
.btn-add-item:hover {
    background: var(--primary);
    color: white;
    border-style: solid;
}

/* Bottom Grid */
.inv-bottom-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 2rem;
    align-items: start;
}
.inv-notes-col textarea {
    width: 100%;
    min-height: 70px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.6rem;
    font-family: inherit;
    font-size: 0.82rem;
    resize: none;
    outline: none;
    margin-bottom: 0.75rem;
}

/* QR Code Box */
.inv-qr-preview-box {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    background: #F8FAFC;
    border: 1px solid var(--border-color);
    padding: 0.65rem 0.85rem;
    border-radius: var(--radius-sm);
}
#invoiceQrCanvas {
    width: 70px !important;
    height: 70px !important;
    min-width: 70px !important;
    min-height: 70px !important;
    max-width: 70px !important;
    max-height: 70px !important;
    flex-shrink: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    background: #ffffff !important;
    border: 1px solid #E2E8F0 !important;
    border-radius: 4px !important;
    overflow: hidden !important;
}
#invoiceQrCanvas canvas, 
#invoiceQrCanvas img {
    width: 70px !important;
    height: 70px !important;
    min-width: 70px !important;
    min-height: 70px !important;
    max-width: 70px !important;
    max-height: 70px !important;
    display: block !important;
    object-fit: contain !important;
}
.inv-qr-text {
    font-size: 0.75rem;
    color: var(--text-muted);
}
.inv-qr-text strong {
    color: var(--text-dark);
    display: block;
    margin-bottom: 0.15rem;
}

/* Summary Box */
.inv-summary-list {
    background: #FAFBFD;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
}
.summary-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.3rem 0;
    font-size: 0.88rem;
}
.summary-row.total-row {
    border-top: 2px solid var(--border-color);
    margin-top: 0.5rem;
    padding-top: 0.6rem;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--primary);
}
.summary-row.due-row {
    background: var(--primary-light);
    margin: 0.5rem -1.25rem -1rem;
    padding: 0.75rem 1.25rem;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    font-size: 1.05rem;
    font-weight: 800;
    color: var(--primary-dark);
}

/* Remove number input spinners */
input[type=number]::-webkit-inner-spin-button, 
input[type=number]::-webkit-outer-spin-button { 
    -webkit-appearance: none; 
    margin: 0; 
}
input[type=number] {
    -moz-appearance: textfield;
}

/* PRO Card */
.pro-card-container {
    max-width: 900px;
    margin: 3rem auto;
    background: linear-gradient(135deg, #1E1B4B, #312E81);
    color: white;
    border-radius: 16px;
    padding: 2rem 2.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    box-shadow: 0 10px 25px rgba(49, 46, 129, 0.25);
}

/* SEO Info Section */
.seo-info-container {
    max-width: 900px;
    margin: 3.5rem auto 1rem;
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    border: 1px solid #E2E8F0;
}

/* Rich 4-Column Footer */
.footer-dark-strip {
    background: #0B0F19;
    color: #94A3B8;
    padding: 4.5rem 1.5rem 2rem;
    margin-top: 4rem;
    border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-grid-4 {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.8fr 1.2fr 1.2fr 1.2fr;
    gap: 3rem;
    margin-bottom: 3.5rem;
}
.footer-brand-title {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 1.35rem;
    font-weight: 800;
    color: #ffffff;
    text-decoration: none;
    margin-bottom: 1rem;
}
.footer-col h4 {
    color: #ffffff;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
    letter-spacing: 0.5px;
}
.footer-col a {
    display: block;
    color: #94A3B8;
    text-decoration: none;
    font-size: 0.88rem;
    margin-bottom: 0.65rem;
    transition: color .2s;
}
.footer-col a:hover { color: #38BDF8; }
.footer-bottom-bar {
    max-width: 1280px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    font-size: 0.85rem;
    color: #64748B;
}

/* =======================================================
   PERFECT PRINT RULES (SYSTEM PRINT DIALOG)
   ======================================================= */
@media print {
    @page {
        size: A4 portrait;
        margin: 6mm 10mm;
    }
    html, body {
        background: #ffffff !important;
        color: #000000 !important;
        margin: 0 !important;
        padding: 0 !important;
        height: auto !important;
        width: 100% !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
    
    body > *:not(.app-container) {
        display: none !important;
    }
    .app-container > *:not(#invoicePaper) {
        display: none !important;
    }
    .app-navbar, 
    .hero-header, 
    .toolbar-strip, 
    .adsense-box, 
    .pro-card-container, 
    .seo-info-container, 
    .footer-dark-strip,
    .btn-add-item,
    .btn-delete-row,
    .logo-remove-btn,
    #logoPlaceholder {
        display: none !important;
        visibility: hidden !important;
        height: 0 !important;
        margin: 0 !important;
        padding: 0 !important;
    }

    .app-container {
        margin: 0 !important;
        padding: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
    }

    #invoicePaper {
        display: block !important;
        visibility: visible !important;
        border: none !important;
        box-shadow: none !important;
        padding: 2mm 0 !important;
        margin: 0 auto !important;
        width: 100% !important;
        max-width: 100% !important;
        page-break-after: avoid !important;
        break-after: avoid !important;
        page-break-inside: avoid !important;
        break-inside: avoid !important;
    }

    .logo-upload-box {
        border: none !important;
        background: transparent !important;
        width: 140px !important;
        height: 70px !important;
    }

    input, textarea {
        border: none !important;
        background: transparent !important;
        box-shadow: none !important;
        padding: 0 !important;
        color: #000000 !important;
        font-family: inherit !important;
    }

    .inv-table th {
        background: #4F46E5 !important;
        color: white !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }
}

@media (max-width: 900px) {
    .footer-grid-4 { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 640px) {
    .footer-grid-4 { grid-template-columns: 1fr; }
    .inv-top-row, .inv-parties-row, .inv-bottom-grid { grid-template-columns: 1fr; }
}