.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: var(--spacing-xl);
    min-height: 100vh;
    transition: margin-left 0.35s cubic-bezier(0.32, 0.72, 0, 1);
}

.content-section {
    display: none;
}

.content-section.active {
    display: block;
}

/* Shared tool shell — every tool renders inside .main-content > .content-section.
   One width, centred, so every tool lines up with the Quote Generator.
   The child selector outranks the .content-section reset in tool-responsive.css. */
.main-content > .content-section {
    max-width: var(--tool-width);
    margin-left: auto;
    margin-right: auto;
}

@media print {
    .main-content > .content-section {
        max-width: none;
    }
}

/* --- Section Header --- */
.section-header {
    margin-bottom: var(--spacing-xl);
}

.section-header h1 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-xs);
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* --- Tool Grid (Dashboard) --- */
.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    min-width: 0;
}

.tool-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-base);
    cursor: pointer;
}

.tool-card h3::before {
    content: "apps";
    width: 22px;
    height: 22px;
    flex: 0 0 22px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 22px;
    transition: color var(--transition-base), font-variation-settings var(--transition-base);
}

.tool-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.tool-card:hover h3::before {
    color: var(--primary-dark);
    font-variation-settings: 'FILL' 1, 'wght' 500, 'GRAD' 0, 'opsz' 24;
}

.tool-card h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.tool-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* --- Calculator Panel Styles --- */
.calculator-panel {
    max-width: 1200px;
}

.calculator-panel h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-lg);
}

/* --- EMI Calculator Layout --- */
.emi-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-xl);
}

.calculator-inputs,
.calculator-results {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

/* --- Input Group --- */
.input-group {
    margin-bottom: var(--spacing-lg);
}

.input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.input-field {
    width: 100%;
    padding: 12px 14px;
    font-size: 1rem;
    font-family: inherit;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.input-field:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.input-field::placeholder {
    color: var(--text-muted);
}

.input-highlight {
    border-color: var(--primary);
    background: var(--primary-light);
}

/* --- Slider Styles --- */
.slider {
    width: 100%;
    margin-top: var(--spacing-xs);
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--border-light);
    border-radius: 3px;
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* --- Control Group & Button Group --- */
.control-group {
    margin-bottom: var(--spacing-lg);
}

.control-group strong {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.button-group {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.btn {
    padding: 10px 16px;
    font-size: 0.9rem;
    font-weight: 500;
    font-family: inherit;
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--on-primary);
}

.input-help {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

/* --- Output Section --- */
.output-section {
    margin-bottom: var(--spacing-lg);
}

.output-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.95rem;
}

.output-item:last-child {
    border-bottom: none;
}

.output-item span:first-child {
    color: var(--text-secondary);
}

.output-item span:last-child {
    font-weight: 600;
    color: var(--text-primary);
}

.result-highlight {
    font-size: 1.1rem !important;
    color: var(--primary) !important;
}

.calculated-result {
    background: var(--primary-light);
    padding: var(--spacing-md) !important;
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-sm);
}

/* --- Chart Container --- */
#emiChartContainer {
    max-width: 250px;
    margin: 0 auto;
}

/* --- Amortization Table --- */
.amortization-table-container {
    margin-top: var(--spacing-xl);
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.amortization-table-container table {
    width: 100%;
    border-collapse: collapse;
}

.amortization-table-container th {
    background: var(--bg-hover);
    padding: var(--spacing-md);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.amortization-table-container td {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
}

.amortization-table-container tr:hover td {
    background: var(--bg-hover);
}

/* --- Form Sections (for Invoice, Receipt, etc.) --- */
.form-section {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.form-section h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-light);
}

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

/* --- Buttons --- */
.btn-primary {
    background: var(--primary);
    border-color: var(--primary);
    color: var(--on-primary);
}

.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: var(--on-primary);
}

.btn-secondary {
    background: var(--bg-hover);
    border-color: var(--border-medium);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border-light);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.action-buttons .btn {
    flex: 1;
    padding: 12px 20px;
}

/* --- Select Dropdown --- */
select.input-field {
    cursor: pointer;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%235A6B7C' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

/* --- Textarea --- */
textarea.input-field {
    resize: vertical;
    min-height: 80px;
}

/* --- Result Cards --- */
.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.result-card h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.result-card .value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

/* --- Package Prices Grid --- */
.price-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.price-item {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.price-item label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
    display: block;
}

.price-item .value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* --- GST Calculator Total Highlight --- */
.total-highlight {
    background: var(--primary-light);
    padding: var(--spacing-md) !important;
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
    border: none !important;
}

.total-highlight span:last-child {
    font-size: 1.15rem !important;
    color: var(--primary) !important;
    font-weight: 700 !important;
}

/* --- Package Pricing Layout --- */
.pricing-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.pricing-inputs {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.pricing-output {
    background: var(--bg-card);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.output-section-pricing {
    padding: 0;
}

.output-section-pricing h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

.pricing-item {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--border-light);
}

.pricing-item:last-child {
    border-bottom: none;
}

.pricing-item .item-label {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.pricing-item .label-main {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
}

.pricing-item .label-sub {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.pricing-item .item-price {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: right;
}

/* Subtotal Row */
.pricing-item.subtotal {
    background: var(--bg-hover);
    margin: var(--spacing-sm) calc(-1 * var(--spacing-lg));
    padding: var(--spacing-sm) var(--spacing-lg);
    border-top: 1px solid var(--border-medium);
    border-bottom: 1px solid var(--border-medium);
}

.pricing-item.subtotal .label-main {
    font-weight: 600;
}

.pricing-item.subtotal .item-price {
    color: var(--text-primary);
    font-weight: 700;
}

/* Final Total Row */
.pricing-item.final-total {
    background: var(--primary-light);
    margin: var(--spacing-sm) calc(-1 * var(--spacing-lg)) calc(-1 * var(--spacing-lg));
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    border-top: 2px solid var(--primary);
}

.pricing-item.final-total .label-main {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--primary-dark);
}

.pricing-item.final-total .item-price {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
}

/* --- EMI Method Help --- */
.emi-method-help {
    margin-top: var(--spacing-xs);
}

/* --- Calc Mode Group --- */
.calc-mode-group {
    background: var(--bg-hover);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.calc-mode-buttons {
    margin-bottom: var(--spacing-xs);
}

/* --- Fixed EMI Group styling --- */
.fixed-emi-group {
    background: var(--primary-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--primary);
}

.fixed-emi-group label {
    color: var(--primary-dark);
}

/* --- Responsive Package Prices --- */
@media screen and (max-width: 1024px) {
    .pricing-layout {
        grid-template-columns: 1fr;
    }
}

/* --- Card lift ---------------------------------------------------------
   Every panel a person fills in sits one step above the page, and they all sit
   at the same step. Listing them in one place is what keeps that true: a tool
   that grows a new card gets the height by naming it here, not by inventing a
   shadow of its own.

   This is chrome only. Nothing that prints, and no wrapper that holds an A4
   preview, appears below - paper is flat, and the page it is laid on gets its
   depth from --viewer-bg instead. The token itself resolves to `none` inside
   @media print, so a stray match cannot reach the paper either. */
.tool-card,
.form-section,
.calculator-inputs,
.calculator-results,
.result-card,
.pricing-inputs,
.pricing-output,
.amortization-table-container,
.cs-form-card,
.cs-spec-card,
.emi-calculator-card,
.emi-amortization-card,
.gst-calculator-card,
.inv-form-card,
.inv-items-card,
.lhd-upload-card,
.mb-form-card,
.mb-repeat-card,
.pi-form-card,
.pi-items-card,
.pkg-card,
.po-form-card,
.po-items-card,
.ps-form-card,
.ps-items-card,
.qg-form-card,
.qg-components-card,
.qg-panel,
.quo-form-card,
.quo-items-card,
.rcpt-form-card,
.rcpt-items-card,
.rfq-form-card,
.rl-card,
.rl-controls-card,
.ssc-form-card,
.warranty-form-card {
    box-shadow: var(--lift);
}

/* --- Mobile Overlay --- */