:root {
    --nemi-red: #f9423a;
    --nemi-red-dark: #d93832;
    --nemi-red-light: rgba(249, 66, 58, 0.07);
    --nemi-dark: #0f172a;
    --nemi-green: #00775d;
    --nemi-pink: #e84393;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --bg-body: #f1f5f9;
    --bg-white: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
    --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
    --radius: 8px;
    --radius-lg: 12px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ===== Header ===== */
.app-header {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 16px 32px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}
.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 16px;
}
.header-logo { height: 32px; }
.header-text h1 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}
.header-text p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ===== Main Content ===== */
.app-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 32px 60px;
}

/* ===== Form Base ===== */
fieldset {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 24px 24px;
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
}
legend {
    font-size: 15px;
    font-weight: 600;
    color: var(--nemi-dark);
    padding: 0 8px;
}
.section-hint {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-section { margin-bottom: 0; }
.form-section + .form-section { margin-bottom: 0; }
fieldset + fieldset { margin-top: 20px; }
.form-row + fieldset { margin-top: 20px; }
fieldset + .form-row { margin-top: 20px; }

/* ===== Fields ===== */
.field { margin-bottom: 14px; }
.field:last-child { margin-bottom: 0; }
.field label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 4px;
}
.field input,
.field select,
.field textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--bg-white);
    transition: border-color 0.15s;
    font-family: inherit;
}
.field input:focus,
.field select:focus,
.field textarea:focus {
    outline: none;
    border-color: var(--nemi-red);
    box-shadow: 0 0 0 3px var(--nemi-red-light);
}
.field input[readonly] {
    background: var(--bg-body);
    cursor: default;
}
.field textarea { resize: vertical; }

.inline-fields {
    display: flex;
    gap: 8px;
}
.inline-fields select { flex: 0 0 140px; }
.inline-fields input { flex: 1; }

/* ===== Product Cards ===== */
.product-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.product-card {
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.product-card.selected {
    border-color: var(--nemi-red);
    box-shadow: 0 0 0 3px var(--nemi-red-light);
}

.product-toggle {
    display: block;
    cursor: pointer;
    padding: 16px;
}
.product-toggle input[type="checkbox"] { display: none; }

.product-header {
    display: flex;
    align-items: center;
    gap: 12px;
}
.product-badge {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    background: var(--nemi-red);
    color: white;
    font-weight: 700;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.product-badge.badge-green { background: var(--nemi-green); }
.product-badge.badge-pink { background: var(--nemi-pink); }
.product-badge.badge-dark { background: var(--nemi-dark); }

.product-header h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}
.product-header p {
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 1px;
}

.product-options {
    display: none;
    padding: 0 16px 16px;
    border-top: 1px solid var(--border);
    margin-top: 0;
    padding-top: 16px;
}
.product-card.selected .product-options { display: block; }

.options-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}
.options-grid .field { margin-bottom: 0; }
.options-grid .field:nth-child(4),
.options-grid .field:nth-child(5) {
    grid-column: span 1;
}

.product-subtotal {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px dashed var(--border);
    text-align: right;
    font-size: 14px;
    font-weight: 600;
    color: var(--nemi-dark);
}
.subtotal-value { color: var(--nemi-red); }

/* ===== Services ===== */
.service-list { display: flex; flex-direction: column; gap: 10px; }

.service-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s;
}
.service-item:hover { background: var(--bg-body); }
.service-item:has(input[type="checkbox"]:checked) {
    border-color: var(--nemi-red);
    background: var(--nemi-red-light);
}

.service-item > input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--nemi-red);
    flex-shrink: 0;
    cursor: pointer;
}

.service-info {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.service-info > span {
    font-size: 14px;
    font-weight: 500;
    white-space: nowrap;
}
.service-price {
    width: 120px;
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    text-align: right;
}
.service-price:focus {
    outline: none;
    border-color: var(--nemi-red);
}
.service-detail {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
}
.service-qty {
    width: 60px;
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 13px;
    text-align: center;
}
.service-qty:focus {
    outline: none;
    border-color: var(--nemi-red);
}

/* ===== Buttons ===== */
.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}
.btn {
    padding: 10px 28px;
    border: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
    font-family: inherit;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
    background: var(--nemi-red);
    color: white;
}
.btn-primary:hover { background: var(--nemi-red-dark); }

.btn-dark {
    background: var(--nemi-dark);
    color: white;
}
.btn-dark:hover { background: #1e293b; }
.btn-dark:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-outline {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border);
}
.btn-outline:hover {
    background: var(--bg-body);
    color: var(--text-primary);
}


/* ======================================================
   PROPOSAL PREVIEW (A4 Pages)
   ====================================================== */

.proposal-preview {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.proposal-page {
    width: 210mm;
    min-height: 297mm;
    background: white;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    page-break-after: always;
    font-size: 11pt;
    line-height: 1.55;
    color: #1e293b;
}

/* --- Cover Page --- */
.cover-page {
    display: flex;
    flex-direction: column;
}
.cover-top-bar {
    height: 6px;
    background: var(--nemi-red);
}
.cover-body {
    flex: 1;
    padding: 50px;
    display: flex;
    flex-direction: column;
}
.cover-logo-area {
    margin-bottom: 60px;
    height: 24px;
}
.cover-logo-area img,
.cover-logo-area svg {
    height: 24px;
    width: auto;
    display: block;
}
.page-header svg {
    height: 24px;
    width: auto;
}
.cover-title-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.cover-title-area h1 {
    font-size: 42pt;
    font-weight: 800;
    color: var(--nemi-dark);
    letter-spacing: -1px;
    margin-bottom: 8px;
}
.cover-title-area .cover-subtitle {
    font-size: 14pt;
    color: var(--text-secondary);
    font-weight: 400;
}
.cover-meta-strip {
    display: flex;
    gap: 32px;
    padding: 20px 0;
    border-top: 2px solid var(--border);
    border-bottom: 2px solid var(--border);
    margin: 40px 0;
}
.cover-meta-item label {
    display: block;
    font-size: 8pt;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    font-weight: 600;
    margin-bottom: 2px;
}
.cover-meta-item span {
    font-size: 11pt;
    font-weight: 600;
    color: var(--nemi-dark);
}

.cover-parties {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-top: auto;
}
.cover-party h4 {
    font-size: 8pt;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--nemi-red);
    font-weight: 700;
    margin-bottom: 10px;
}
.cover-party p {
    font-size: 10pt;
    color: var(--text-primary);
    margin-bottom: 2px;
}
.cover-party .company-name {
    font-size: 12pt;
    font-weight: 700;
    color: var(--nemi-dark);
    margin-bottom: 6px;
}

.cover-footer-bar {
    padding: 14px 50px;
    background: var(--nemi-dark);
    color: rgba(255,255,255,0.7);
    font-size: 8pt;
    display: flex;
    justify-content: space-between;
}

/* --- Inner Pages --- */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 24px 50px;
    border-bottom: 2px solid var(--nemi-red);
}
.page-header img,
.page-header svg { height: 24px; }
.page-header .page-title {
    font-size: 10pt;
    font-weight: 600;
    color: var(--nemi-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.page-body {
    padding: 30px 50px;
    flex: 1;
}

.page-footer {
    padding: 12px 50px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    font-size: 8pt;
    color: var(--text-muted);
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

/* --- Section Titles in Pages --- */
.section-title {
    font-size: 14pt;
    font-weight: 700;
    color: var(--nemi-dark);
    margin-bottom: 6px;
}
.section-desc {
    font-size: 10pt;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

/* --- Product Detail Cards (in proposal) --- */
.prop-product-card {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 18px 20px;
    margin-bottom: 14px;
    display: flex;
    align-items: flex-start;
    gap: 16px;
}
.prop-product-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
    color: white;
    flex-shrink: 0;
}
.prop-product-content { flex: 1; }
.prop-product-content h4 {
    font-size: 12pt;
    font-weight: 700;
    color: var(--nemi-dark);
    margin-bottom: 4px;
}
.prop-product-content p {
    font-size: 9pt;
    color: var(--text-secondary);
    margin-bottom: 8px;
}
.prop-product-specs {
    display: flex;
    gap: 20px;
}
.prop-product-specs span {
    font-size: 9pt;
    color: var(--text-secondary);
}
.prop-product-specs strong {
    color: var(--text-primary);
}
.prop-product-price {
    text-align: right;
    flex-shrink: 0;
}
.prop-product-price .price-amount {
    font-size: 14pt;
    font-weight: 700;
    color: var(--nemi-dark);
}
.prop-product-price .price-label {
    font-size: 8pt;
    color: var(--text-muted);
}

/* --- Tables --- */
.prop-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 9.5pt;
    margin-bottom: 20px;
}
.prop-table thead th {
    background: var(--nemi-dark);
    color: white;
    padding: 10px 14px;
    text-align: left;
    font-weight: 600;
    font-size: 8.5pt;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}
.prop-table thead th:first-child { border-radius: 6px 0 0 0; }
.prop-table thead th:last-child { border-radius: 0 6px 0 0; }
.prop-table tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid #f1f5f9;
}
.prop-table tbody tr:nth-child(even) td { background: #fafbfc; }
.prop-table .text-right { text-align: right; }
.prop-table .text-center { text-align: center; }

.prop-table tfoot td {
    padding: 10px 14px;
    font-weight: 600;
    border-top: 2px solid var(--border);
}
.prop-table .total-row td {
    background: var(--nemi-red);
    color: white;
    font-size: 11pt;
    font-weight: 700;
    border: none;
}
.prop-table .total-row td:first-child { border-radius: 0 0 0 6px; }
.prop-table .total-row td:last-child { border-radius: 0 0 6px 0; }

.prop-table .subtotal-row td {
    background: var(--bg-body);
    font-weight: 600;
}
.prop-table .discount-row td { color: var(--nemi-green); }
.prop-table .vat-row td { color: var(--text-secondary); }

/* --- Charts --- */
.charts-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-top: 24px;
}
.chart-box {
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
}
.chart-box h4 {
    font-size: 10pt;
    font-weight: 600;
    color: var(--nemi-dark);
    margin-bottom: 14px;
    text-align: center;
}
.chart-box canvas {
    max-height: 220px;
}

/* --- Timeline --- */
.timeline-container { margin-top: 20px; }
.timeline-item {
    display: flex;
    gap: 16px;
    margin-bottom: 18px;
    position: relative;
}
.timeline-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--nemi-red);
    flex-shrink: 0;
    margin-top: 4px;
    position: relative;
    z-index: 1;
}
.timeline-item:not(:last-child) .timeline-dot::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 12px;
    width: 2px;
    height: calc(100% + 12px);
    background: var(--border);
}
.timeline-info h5 {
    font-size: 10pt;
    font-weight: 600;
    color: var(--nemi-dark);
    margin-bottom: 2px;
}
.timeline-info p {
    font-size: 9pt;
    color: var(--text-secondary);
}

/* --- Terms Page --- */
.terms-list {
    list-style: none;
    padding: 0;
}
.terms-list li {
    padding: 10px 0;
    border-bottom: 1px solid #f1f5f9;
    font-size: 10pt;
    display: flex;
    gap: 10px;
}
.terms-list li:last-child { border-bottom: none; }
.terms-number {
    width: 24px;
    height: 24px;
    background: var(--nemi-red-light);
    color: var(--nemi-red);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8pt;
    font-weight: 700;
    flex-shrink: 0;
}

.signature-area {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 2px solid var(--border);
}
.signature-box h5 {
    font-size: 9pt;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--nemi-red);
    font-weight: 700;
    margin-bottom: 8px;
}
.signature-box p {
    font-size: 9.5pt;
    color: var(--text-primary);
    margin-bottom: 2px;
}
.signature-line {
    margin-top: 50px;
    border-top: 1px solid var(--text-primary);
    padding-top: 6px;
    font-size: 8pt;
    color: var(--text-muted);
}

/* --- Key Metrics --- */
.key-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}
.metric-card {
    text-align: center;
    padding: 20px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--bg-body);
}
.metric-card .metric-value {
    font-size: 22pt;
    font-weight: 800;
    color: var(--nemi-red);
    display: block;
    margin-bottom: 4px;
}
.metric-card .metric-label {
    font-size: 9pt;
    color: var(--text-secondary);
    font-weight: 500;
}

/* --- Highlight Box --- */
.highlight-box {
    background: var(--nemi-red-light);
    border-left: 4px solid var(--nemi-red);
    padding: 16px 20px;
    border-radius: 0 8px 8px 0;
    margin: 20px 0;
}
.highlight-box p {
    font-size: 10pt;
    color: var(--text-primary);
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .form-row { grid-template-columns: 1fr; }
    .product-cards { grid-template-columns: 1fr; }
    .options-grid { grid-template-columns: repeat(2, 1fr); }
    .app-content { padding: 16px; }
    .proposal-page { width: 100%; min-height: auto; }
}

/* ===== Print / PDF Styles ===== */
@media print {
    body { background: white; }
    .app-header, form, .form-actions { display: none !important; }
    .proposal-preview {
        margin: 0;
        gap: 0;
    }
    .proposal-page {
        box-shadow: none;
        page-break-after: always;
        margin: 0;
    }
}