/* ==================== CALCULATOR GRID LAYOUT ==================== */
.calculator-grid {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 15px;
    height: 100%;
    min-height: 0;
    transition: all 0.3s ease;
}

/* Overlay mode – hide all direct children except formula calculator */
.calculator-grid.overlay-mode > *:not(#formula-calculator-card) {
    display: none;
}
.calculator-grid.overlay-mode #formula-calculator-card {
    display: flex;
    grid-column: 1 / -1;
    height: 100%;
}

/* Card headers with icons and actions */
.card-header-with-icon {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.card-header-with-icon h3 i,
.card-header-with-actions h3 i,
.card-header-with-actions h4 i {
    margin-right: 6px;
    color: var(--theme-calculator-accent);
}
.card-header-with-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.card-header-with-actions h3,
.card-header-with-actions h4 {
    margin: 0;
}

/* Multi toggle button */
.multi-toggle-btn {
    background: transparent;
    color: var(--theme-calculator-accent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: all 0.2s ease;
}
.multi-toggle-btn i {
    font-size: 0.8rem;
}
.multi-toggle-btn:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.multi-toggle-btn.active {
    background: var(--theme-calculator-accent);
    color: white;
}

/* Pulse animation for active multi button – green */
@keyframes pulse-green {
    0% { box-shadow: 0 0 0 0 rgba(0, 168, 0, 0.7); }
    70% { box-shadow: 0 0 0 6px rgba(0, 168, 0, 0); }
    100% { box-shadow: 0 0 0 0 rgba(0, 168, 0, 0); }
}

/* Red pulse for error */
@keyframes pulse-red {
    0% { box-shadow: 0 0 0 0 rgba(244, 67, 54, 0.7); }
    70% { box-shadow: 0 0 0 6px rgba(244, 67, 54, 0); }
    100% { box-shadow: 0 0 0 0 rgba(244, 67, 54, 0); }
}

.multi-toggle-btn.active {
    animation: pulse-green 1.5s infinite;
    background: var(--theme-calculator-accent);
    color: white;
}

/* Active indicator dot for card headers */
.active-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    background-color: #4caf50;
    border-radius: 50%;
    margin-left: 6px;
    box-shadow: 0 0 5px #4caf50;
}

/* Selected products card */
.selected-products-card {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    min-height: 100px;
}
.selected-products-card.hidden {
    display: none;
}
.selected-products-card.has-items {
    border: 2px solid var(--theme-calculator-accent);
}
.selected-products-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
    padding-bottom: 5px;
    border-bottom: 2px solid rgba(0, 168, 0, 0.3);
}
.selected-products-header h4 {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-dark);
}
.selected-products-header h4 i {
    color: var(--theme-calculator-accent);
    margin-right: 4px;
}
.calculate-now-btn {
    background: var(--theme-calculator-accent);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 4px 10px;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}
.calculate-now-btn:hover {
    background: var(--theme-calculator-accent-light);
    box-shadow: var(--glow-box-hover-green);
}
.selected-products-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    min-height: 32px;
}
.selected-product-tag {
    display: inline-flex;
    align-items: center;
    background: rgba(0, 168, 0, 0.1);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.7rem;
    color: var(--text-dark);
    cursor: pointer;
    transition: all 0.2s ease;
}
.selected-product-tag i {
    margin-left: 6px;
    font-size: 0.6rem;
    color: var(--theme-calculator-accent);
}
.selected-product-tag:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.selected-product-tag:hover i {
    color: white;
}

/* Left column – Recent Calculations */
.recent-calculations-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
}
.recent-calculations-card.full-height {
    height: 100%;
}
.recent-calculations-card .calculations-list-container {
    flex: 1;
    overflow-y: auto;
    margin-bottom: 8px;
    min-height: 0;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(0, 168, 0, 0.1);
}
.recent-calculations-card .calculations-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-right: 4px;
}
.recent-calculations-card .calculations-list.blurred .calculation-result {
    filter: blur(var(--blur-amount));
    user-select: none;
    cursor: default;
}
.recent-calculations-card .calculations-list.blurred .calculation-product,
.recent-calculations-card .calculations-list.blurred .calculation-expression {
    filter: none;
}
.recent-calculations-card .calculation-item {
    background: #fff;
    border-radius: 5px;
    padding: 8px 10px;
    border: 1px solid rgba(0, 168, 0, 0.2);
    transition: var(--transition-normal);
    min-height: 48px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.recent-calculations-card .calculation-item:hover {
    box-shadow: var(--glow-box-hover-green);
    background: #fff;
}
.recent-calculations-card .calculation-product {
    font-size: 0.75rem;
    color: var(--text-dark);
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 1px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.recent-calculations-card .calculation-expression {
    font-size: 0.65rem;
    color: #666;
    font-weight: 400;
    margin-bottom: 1px;
    font-family: 'Courier New', monospace;
    line-height: 1.2;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.recent-calculations-card .calculation-result {
    font-size: 0.8rem;
    color: var(--theme-calculator-accent);
    font-weight: 700;
    text-align: right;
    text-shadow: var(--glow-text-green);
    margin-top: 1px;
}

/* Right column – stacked cards */
.calculator-right-column {
    display: flex;
    flex-direction: column;
    gap: 15px;
    height: 100%;
    min-height: 0;
    overflow: hidden;
}

/* Product Search card */
.product-search-card {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    min-height: 200px;
}
.product-search-card .search-container {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    align-items: center;
}
.product-search-card .search-wrapper {
    position: relative;
    flex: 1;
}
.product-search-card .search-wrapper .search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    font-size: 1rem;
    z-index: 1;
}
.product-search-card .search-wrapper .search-input {
    padding-left: 44px;
    font-size: 1rem;
    height: 40px;
    width: 100%;
}
.product-search-card .recent-products {
    margin-top: 10px;
    flex: 1;
    overflow-y: auto;
}
.product-search-card .recent-products h4 {
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--theme-calculator-green);
}
.product-search-card .recent-products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}
.product-search-card .product-item {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 8px 6px;
    background: rgba(255,255,255,0.9);
    border-radius: 4px;
    border: 1px solid rgba(0, 168, 0, 0.2);
    transition: all var(--transition-normal);
    min-height: 44px;
    text-align: center;
    cursor: pointer;
}
.product-search-card .product-item:hover {
    box-shadow: var(--glow-box-hover-green);
    background: #fff;
}
.product-search-card .product-name {
    font-size: 0.75rem;
    color: var(--text-dark);
    font-weight: 500;
    width: 100%;
    text-align: center;
    line-height: 1.2;
}

/* Warehouse Products card */
.warehouse-products-card {
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    max-height: 220px;
}
.warehouse-products-card h4 {
    margin-bottom: 8px;
    font-size: 0.85rem;
    color: var(--theme-calculator-green);
    display: flex;
    align-items: center;
    gap: 6px;
}
.warehouse-products-card h4 i {
    color: var(--theme-calculator-accent);
}
.warehouse-products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 5px;
    overflow-y: auto;
    flex: 1;
    padding-right: 4px;
}
.warehouse-product-tile {
    background: white;
    border-radius: 4px;
    border: 1px solid color-mix(in srgb, var(--theme-calculator-accent) 20%, transparent);
    padding: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    gap: 3px;
}
.warehouse-product-tile:hover {
    box-shadow: var(--glow-box-hover-green);
    border-color: var(--theme-calculator-accent);
}
.warehouse-tile-name {
    font-size: 0.7rem;
    color: var(--text-dark);
    font-weight: 500;
    line-height: 1.15;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.warehouse-tile-cas {
    font-size: 0.55rem;
    color: var(--text-light);
    background: color-mix(in srgb, var(--theme-calculator-accent) 5%, transparent);
    padding: 1px 4px;
    border-radius: 2px;
    display: inline-block;
    align-self: flex-start;
}
.warehouse-tile-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 2px;
}
.warehouse-tile-price {
    font-size: 0.65rem;
    color: var(--theme-accent);
    font-weight: 600;
}
.warehouse-tile-price.blurred {
    filter: blur(5px);
    cursor: pointer;
    user-select: none;
}
.warehouse-tile-stock-tubes {
    display: flex;
    gap: 2px;
    align-items: center;
}
.warehouse-tile-stock-tubes .stock-tube {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: #ccc;
    flex-shrink: 0;
}
.warehouse-tile-stock-tubes .stock-tube.red { background: #f44336; }
.warehouse-tile-stock-tubes .stock-tube.yellow { background: #ffeb3b; }
.warehouse-tile-stock-tubes .stock-tube.green { background: #4caf50; }

/* Manual Product Selection card */
.manual-selection-card {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 140px;
    overflow: hidden;
}
.manual-selection-card .selection-card-header {
    display: flex;
    justify-content: flex-end;
    margin-bottom: 8px;
}
.manual-selection-card .deselect-btn {
    background: transparent;
    color: var(--theme-calculator-accent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 3px 8px;
    font-size: 0.7rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.manual-selection-card .deselect-btn i {
    font-size: 0.8rem;
}
.manual-selection-card .deselect-btn:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.manual-selection-card .deselect-btn.hidden {
    display: none;
}
.manual-selection-card .materials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    overflow-y: auto;
    flex: 1;
    padding-right: 4px;
}
.manual-selection-card .material-item,
.manual-selection-card .product-sub-item {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px 6px;
    background: white;
    border-radius: 5px;
    border: 1px solid color-mix(in srgb, var(--theme-calculator-accent) 20%, transparent);
    transition: all 0.3s ease;
    min-height: 44px;
    text-align: center;
    cursor: pointer;
    font-size: 0.75rem;
    color: var(--text-dark);
    font-weight: 500;
    line-height: 1.2;
}
.manual-selection-card .material-item:hover,
.manual-selection-card .product-sub-item:hover {
    background: white;
    box-shadow: var(--glow-box-hover-green);
}
.manual-selection-card .material-item.active,
.manual-selection-card .product-sub-item.active {
    background: var(--theme-calculator-selected);
    color: white;
    border-color: var(--theme-calculator-selected);
}
/* Selected product in manual grid (greyed out) */
.manual-selection-card .product-sub-item.selected {
    opacity: 0.5;
    background: #e0e0e0;
    pointer-events: none;
    cursor: not-allowed;
}

/* ========== FORMULA CALCULATOR OVERLAY ========== */
.formula-calculator-card {
    display: flex;
    flex-direction: column;
    background: var(--theme-card-bg);
    border-radius: var(--radius-lg);
    box-shadow: 6px 6px 12px var(--theme-shadow-dark), -6px -6px 12px var(--shadow-light);
    border: 1px solid var(--theme-card-border);
    padding: 16px;
    transition: all var(--transition-normal);
}
.formula-calculator-card.hidden {
    display: none;
}
.formula-calculator-card .formula-header-with-unfocus {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
}
.formula-calculator-card .formula-header-with-unfocus h3 {
    margin: 0;
}
.unfocus-button {
    background: color-mix(in srgb, var(--theme-accent) 10%, transparent);
    color: var(--theme-accent);
    border: 1px solid color-mix(in srgb, var(--theme-accent) 30%, transparent);
    border-radius: 4px;
    padding: 5px 8px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s ease;
    font-family: inherit;
}
.unfocus-button i {
    font-size: 0.9rem;
}
.unfocus-button:hover {
    background: var(--theme-accent);
    color: white;
    box-shadow: var(--theme-glow-box-hover);
}

/* New layout for formula calculator overlay – third column reduced width */
.formula-calculator-container {
    display: grid;
    grid-template-columns: 1.2fr 1.8fr 1.68fr;
    gap: 12px;
    height: 100%;
    min-height: 0;
    margin-top: 6px;
}

/* Left column – Toolbox accordions */
.toolbox-section {
    grid-column: 1;
    height: 100%;
    overflow-y: auto;
    background: rgba(255,255,255,0.5);
    border-radius: var(--radius-md);
    padding: 8px;
}
.toolbox-accordion {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.accordion-header {
    background: var(--theme-card-bg);
    border-radius: var(--radius-sm);
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-dark);
    border: 1px solid color-mix(in srgb, var(--theme-accent) 20%, transparent);
    transition: all 0.2s ease;
}
.accordion-header i {
    color: var(--theme-accent);
    transition: transform 0.2s;
}
.accordion-header.expanded i {
    transform: rotate(90deg);
}
.accordion-header:hover {
    background: color-mix(in srgb, var(--theme-accent) 10%, transparent);
}
.accordion-body {
    background: white;
    border-radius: var(--radius-sm);
    padding: 12px;
    margin-top: 4px;
    border: 1px solid color-mix(in srgb, var(--theme-accent) 20%, transparent);
    display: block;
}
.accordion-body.collapsed {
    display: none;
}

/* Calculator container inside accordion */
.calculator-container {
    background: #fff;
    border-radius: var(--radius-md);
    padding: 10px;
    box-shadow: none;
    border: 1px solid rgba(0,168,0,0.2);
}
.calculator-display {
    background: var(--theme-calculator-green-dark);
    color: var(--theme-calculator-accent);
    padding: 6px 10px;
    border-radius: 4px;
    text-align: right;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    margin-bottom: 6px;
    box-shadow: inset 2px 2px 6px rgba(0,0,0,0.4);
    text-shadow: var(--glow-text-green);
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
}
.calculator-grid-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 4px;
    margin-top: 6px;
}
.calc-btn {
    height: 30px;
    border-radius: 4px;
    background: #fff;
    box-shadow: 2px 2px 4px rgba(209,217,230,0.2), -2px -2px 4px var(--shadow-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-dark);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
    border: 1px solid rgba(0,168,0,0.1);
}
.calc-btn:hover { box-shadow: var(--glow-box-hover-green); border-color: rgba(0,168,0,0.3); }
.calc-btn:active { box-shadow: inset 2px 2px 4px rgba(209,217,230,0.2), inset -2px -2px 4px var(--shadow-light); }
.calc-btn.op { color: var(--theme-calculator-accent); font-weight: 700; }
.calc-btn.equals {
    background: var(--theme-calculator-accent);
    color: #fff;
    box-shadow: var(--glow-box-hover-green);
    border-color: rgba(0,168,0,0.4);
}
.calc-btn.equals:hover { box-shadow: 0 0 8px rgba(0,168,0,0.24); }
.calc-btn.clear { color: var(--theme-dashboard-orange); }
.calculator-actions {
    display: flex;
    gap: 6px;
    margin-top: 6px;
}
.calc-action-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 6px;
    background: rgba(0,168,0,0.1);
    color: var(--theme-calculator-accent);
    border: 1px solid rgba(0,168,0,0.2);
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}
.calc-action-btn:hover { background: rgba(0,168,0,0.2); box-shadow: var(--glow-box-hover-green); }

/* Notes section inside accordion */
.notes-section {
    background: transparent;
    border: none;
    padding: 0;
    margin-top: 0;
}
.notes-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(0,168,0,0.3);
}
.notes-header h4 { margin: 0; color: var(--theme-calculator-green); font-size: 0.9rem; }
.notes-count {
    font-size: 0.7rem;
    color: var(--text-light);
    background: rgba(0,168,0,0.1);
    padding: 2px 5px;
    border-radius: 5px;
}
.notes-list {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
    overflow-y: auto;
    padding-right: 4px;
    max-height: 150px;
}
.note-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    text-align: center;
    color: var(--text-light);
    padding: 8px;
}
.note-empty i { font-size: 1.5rem; margin-bottom: 6px; color: rgba(0,168,0,0.3); }
.note-item {
    background: rgba(255,255,255,0.9);
    border-radius: 3px;
    padding: 5px 6px;
    border: 1px solid rgba(0,168,0,0.2);
    font-size: 0.7rem;
    color: var(--text-dark);
}
.note-item .note-expression {
    font-family: 'Courier New', monospace;
    color: #666;
    margin-bottom: 1px;
    line-height: 1.2;
    font-size: 0.65rem;
}
.note-item .note-result {
    font-weight: 600;
    color: var(--theme-calculator-accent);
    text-align: right;
    font-size: 0.75rem;
}
.note-text {
    width: 100%;
    margin-top: 4px;
    padding: 2px 4px;
    font-size: 0.7rem;
}

/* Memory/History area */
.memory-history {
    padding: 8px;
    color: var(--text-light);
    font-style: italic;
}

/* Middle column – Values section */
.values-section {
    grid-column: 2;
    display: flex;
    flex-direction: column;
    gap: 12px;
    height: 100%;
    min-height: 0;
    overflow-y: auto;
}
.values-column {
    background: rgba(255,255,255,0.9);
    border-radius: var(--radius-md);
    padding: 12px;
    border: 1px solid rgba(0,168,0,0.2);
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}
.values-column h4 {
    margin: 0 0 10px 0;
    color: var(--theme-calculator-green);
    font-size: 0.9rem;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(0,168,0,0.3);
    display: flex;
    align-items: center;
    gap: 6px;
}
.values-column h4 i {
    color: var(--theme-calculator-accent);
    font-size: 1.22rem;
}
.price-preview {
    margin-bottom: 18px;
    font-size: 0.8rem;
    background: rgba(0,168,0,0.05);
    padding: 10px 8px;
    border-radius: 4px;
    border-left: 3px solid var(--theme-calculator-accent);
}
#price-preview-text {
    font-weight: 600;
    color: var(--theme-calculator-accent);
    font-size: 1.1rem;
}
.values-inputs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 12px;
}
.value-input-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.value-input-item label {
    font-size: 0.65rem;
    color: var(--text-light);
}
/* Icons in value inputs: 22% larger + extra spacing */
.value-input-item label i {
    margin-right: 8px;   /* increased spacing */
    width: 1.22rem;
    font-size: 1.22rem;
    color: var(--theme-calculator-accent);
    vertical-align: middle;
}
.value-input-item label span {
    font-size: 0.85rem;
}
.value-input-item input[type="number"] {
    padding: 6px 8px;
    border: 1px solid rgba(0,168,0,0.3);
    border-radius: 4px;
    font-size: 0.8rem;
    width: 100%;
    background: white;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.amount-input-row {
    display: flex;
    gap: 6px;
    align-items: center;
}
.amount-input-row input[type="number"] {
    flex: 1;
}
.fcl-btn {
    background: white;
    color: var(--theme-calculator-accent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 6px 10px;
    font-size: 0.72rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}
.fcl-btn:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.fcl-btn:active {
    transform: scale(0.96);
}
.fcl-btn.active {
    background: var(--theme-calculator-accent);
    color: white;
    animation: pulse-green 1.5s infinite;
}
.fcl-select {
    background: #f0f0f0;
    color: #999;
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 6px 6px;
    font-size: 0.72rem;
    font-weight: 600;
    cursor: not-allowed;
    transition: all 0.15s ease;
    min-width: 48px;
}
.fcl-select:enabled {
    background: white;
    color: var(--theme-calculator-accent);
    border-color: var(--theme-calculator-accent);
    cursor: pointer;
}
.fcl-select:enabled:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.value-input[disabled] {
    background: #f5f5f5;
    color: #999;
    cursor: not-allowed;
}
.value-input-item input[type="number"]:focus {
    outline: none;
    border-color: var(--theme-calculator-accent);
    box-shadow: 0 0 0 2px rgba(0,168,0,0.1);
}
.value-input-item input.input-error {
    border-color: #f44336;
    background-color: #ffebee;
    animation: shake 0.3s ease-in-out;
}
.value-input-item input.pulse-red {
    animation: pulse-red 0.3s ease-in-out;
}
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-4px); }
    40%, 80% { transform: translateX(4px); }
}
.error-message {
    font-size: 0.6rem;
    color: #f44336;
    min-height: 16px;
    visibility: hidden;
}
.error-message.visible {
    visibility: visible;
}
.calc-now-values-btn {
    margin-top: 8px;
    background: var(--theme-calculator-accent);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 12px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    text-align: center;
}
.calc-now-values-btn:hover {
    background: var(--theme-calculator-accent-light);
    box-shadow: var(--glow-box-hover-green);
}
.quick-actions-column {
    flex-shrink: 0;
    background: rgba(255,255,255,0.9);
    border-radius: var(--radius-md);
    padding: 12px;
    border: 1px solid rgba(0,168,0,0.2);
}
.quick-actions-column h4 {
    margin: 0 0 10px 0;
    color: var(--theme-calculator-green);
    font-size: 0.9rem;
    padding-bottom: 4px;
    border-bottom: 1px solid rgba(0,168,0,0.3);
    display: flex;
    align-items: center;
    gap: 6px;
}
.quick-actions-column h4 i { color: var(--theme-calculator-accent); }
.quick-actions-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.quick-action-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    background: rgba(255,255,255,0.9);
    border-radius: 4px;
    border: 1px solid rgba(0,168,0,0.2);
    cursor: pointer;
    transition: all var(--transition-normal);
    min-height: 36px;
}
.quick-action-item:hover {
    background: #fff;
    box-shadow: var(--glow-box-hover-green);
}
.quick-action-item i {
    font-size: 0.9rem;
    color: var(--theme-calculator-accent);
    width: 20px;
    text-align: center;
}
.quick-action-item span {
    font-size: 0.8rem;
    color: var(--text-dark);
    font-weight: 500;
    flex: 1;
}

/* Right column – Variables container */
.variables-container {
    grid-column: 3;
    display: flex;
    flex-direction: column;
    gap: 12px;
    height: 100%;
    min-height: 0;
    overflow-y: auto;
}

/* Product info card – two-column layout (2:3 ratio) */
.product-info-card {
    background: white;
    border-radius: var(--radius-sm);
    border: 1px solid var(--theme-calculator-accent);
    padding: 10px 12px;
    margin-bottom: 0;
    transition: all 0.2s ease;
}
.product-info-header {
    font-weight: 600;
    color: var(--theme-calculator-accent);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    border-bottom: 1px solid color-mix(in srgb, var(--theme-calculator-accent) 30%, transparent);
    padding-bottom: 4px;
}
.product-info-header i {
    background: var(--theme-calculator-accent);
    color: white;
    border-radius: 50%;
    padding: 4px;
    font-size: 0.8rem;
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.dg-warning-badge {
    margin-left: auto;
    color: #dc3545;
    font-size: 0.7rem;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 3px;
    background: #fff0f0;
    padding: 2px 6px;
    border-radius: 4px;
    border: 1px solid #dc3545;
}
.dg-warning-badge i {
    background: #dc3545 !important;
    font-size: 0.65rem !important;
    width: 16px !important;
    height: 16px !important;
}
.product-info-two-columns {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 15px;
    margin-top: 6px;
}
.product-info-left {
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.product-info-right {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.product-info-name {
    font-weight: 600;
    color: var(--text-dark);
    font-size: 0.9rem;
}
.product-info-cas, .product-info-price {
    color: var(--text-light);
    font-size: 0.7rem;
}
.product-info-price {
    font-size: 1.1rem;
    font-weight: 700;
    color: #4caf50;
    line-height: 1.4;
}
.product-info-price .price-usd {
    font-size: 0.85rem;
    font-weight: 500;
    color: #66bb6a;
}
.tax-refund-yes {
    color: #f44336;
    font-weight: 600;
}
.tax-refund-no {
    color: #4caf50;
    font-weight: 600;
}
.product-thumbnail {
    margin-bottom: 8px;
    text-align: center;
}
#product-thumbnail-img {
    max-width: 108px;
    max-height: 108px;
    border-radius: 4px;
    border: 1px solid var(--theme-calculator-accent);
    background: #f5f5f5;
    object-fit: cover;
}
.modifications-row, .grades-row, .variations-row, .origin-section {
    margin-top: 0;
}
.modifications-row label, .grades-row label, .variations-row label, .origin-section label {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-dark);
    display: block;
    margin-bottom: 4px;
}
.mod-option-btn, .grade-option-btn {
    background: color-mix(in srgb, var(--theme-calculator-accent) 10%, transparent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.7rem;
    margin-right: 4px;
    margin-bottom: 4px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--theme-calculator-accent);
}
.mod-option-btn.active, .grade-option-btn.active {
    background: var(--theme-calculator-accent);
    color: white;
}
.mod-option-btn:hover, .grade-option-btn:hover, .variation-btn:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.grade-option-btn .grade-wh-icon {
    font-size: 0.5rem;
    margin-left: 3px;
    color: var(--theme-accent);
    opacity: 0.55;
    vertical-align: middle;
}
.grade-option-btn.active .grade-wh-icon, .grade-option-btn:hover .grade-wh-icon {
    color: white;
    opacity: 1;
}
.variation-btn {
    background: color-mix(in srgb, var(--theme-calculator-accent) 10%, transparent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.7rem;
    margin-right: 4px;
    margin-bottom: 4px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--theme-calculator-accent);
}
.variation-btn.active {
    background: var(--theme-calculator-accent);
    color: white;
}
.origin-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}
.origin-btn {
    background: color-mix(in srgb, var(--theme-calculator-accent) 10%, transparent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 4px 8px;
    font-size: 0.7rem;
    cursor: pointer;
    color: var(--theme-calculator-accent);
    transition: all 0.2s;
}
.origin-btn.active {
    background: var(--theme-calculator-accent);
    color: white;
}
.origin-btn:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.origin-btn.no-stock {
    opacity: 0.4;
    cursor: not-allowed;
    border-style: dashed;
}
.origin-btn.no-stock:hover {
    background: color-mix(in srgb, var(--theme-calculator-accent) 10%, transparent);
    color: var(--theme-calculator-accent);
}
.no-options {
    font-size: 0.7rem;
    color: var(--text-light);
    font-style: italic;
}

/* Compact view for product info after selections */
.product-info-card.compact .product-info-two-columns {
    display: none;
}
.product-info-card.compact .compact-info-bar {
    display: flex;
}
.compact-info-bar {
    display: none;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
}
.compact-info-details {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: baseline;
    font-size: 0.8rem;
}
.compact-info-details strong {
    color: var(--theme-calculator-accent);
}
.compact-edit-btn {
    background: transparent;
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 0.7rem;
    cursor: pointer;
    color: var(--theme-calculator-accent);
    transition: all 0.2s;
}
.compact-edit-btn:hover {
    background: var(--theme-calculator-accent);
    color: white;
}

/* Preset buttons row inside formula header */
.formula-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 2px solid var(--theme-calculator-accent);
}
.formula-header i { font-size: 1.2rem; color: var(--theme-calculator-accent); }
.formula-header h4 { margin: 0; color: var(--theme-calculator-accent); font-size: 0.95rem; font-weight: 600; }
.preset-buttons-row {
    display: flex;
    gap: 6px;
}
.preset-btn {
    background: color-mix(in srgb, var(--theme-calculator-accent) 10%, transparent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 3px 8px;
    font-size: 0.65rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--theme-calculator-accent);
}
.preset-btn.default-btn {
    background: var(--theme-calculator-accent);
    color: white;
    border-color: var(--theme-calculator-accent);
    cursor: pointer;
    opacity: 1;
}
.preset-btn.custom-btn,
.preset-btn.special-btn {
    background: #e0e0e0;
    color: #999;
    border-color: #ccc;
    cursor: not-allowed;
    opacity: 0.6;
}
.preset-btn.custom-btn:hover,
.preset-btn.special-btn:hover {
    background: #e0e0e0;
    color: #999;
    box-shadow: none;
    transform: none;
}
.preset-btn:not(.default-btn):hover {
    background: var(--theme-calculator-accent);
    color: white;
}

/* Variables grid – now a flex column for groups */
.variables-grid {
    display: flex;
    flex-direction: column;
    gap: 16px;
    flex: 1;
    overflow-y: auto;
    padding: 4px;
}

/* Each variable category group */
.variable-group {
    background: rgba(255,255,255,0.9);
    border-radius: 6px;
    border: 1px solid rgba(0,168,0,0.2);
    padding: 12px;
}
.variable-group-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--theme-calculator-accent);
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.variable-group-title i {
    font-size: 1rem;
}
.group-required {
    font-size: 0.7rem;
    font-weight: normal;
    color: #f44336;
    background: rgba(244, 67, 54, 0.1);
    padding: 2px 6px;
    border-radius: 12px;
}
.group-optional {
    font-size: 0.7rem;
    font-weight: normal;
    color: #ff9800;
    background: rgba(255, 152, 0, 0.1);
    padding: 2px 6px;
    border-radius: 12px;
}
.variable-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.variable-chip {
    background: color-mix(in srgb, var(--theme-calculator-accent) 10%, transparent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 20px;
    padding: 6px 12px;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--theme-calculator-accent);
}
.variable-chip.active {
    background: var(--theme-calculator-accent);
    color: white;
}
.variable-chip.selected-chip {
    background: var(--theme-calculator-accent);
    color: white;
    opacity: 0.8;
    cursor: default;
    pointer-events: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.variable-chip.selected-chip i {
    color: white;
}
.variable-chip:hover:not(.active):not(.selected-chip) {
    background: color-mix(in srgb, var(--theme-calculator-accent) 20%, transparent);
}
.destination-select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    background: white;
    font-size: 0.8rem;
    color: var(--text-dark);
}

/* Back button styling */
.row-back-btn {
    background: transparent;
    color: var(--theme-calculator-accent);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 4px;
    padding: 4px 12px;
    font-size: 0.7rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.row-back-btn:hover {
    background: var(--theme-calculator-accent);
    color: white;
}

/* Selected variables container - font reduced by 22% */
#selected-variables-container {
    background: white;
    border-radius: var(--radius-sm);
    border: 1px solid var(--theme-calculator-accent);
    padding: 10px;
    margin-bottom: 8px;
    display: none;
}
#selected-variables-container h4 {
    margin: 0 0 6px 0;
    font-size: 0.8rem;
    color: var(--theme-calculator-accent);
    display: flex;
    align-items: center;
    gap: 4px;
}
.selected-variables-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.selected-variable-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: color-mix(in srgb, var(--theme-calculator-accent) 15%, white);
    border: 1px solid var(--theme-calculator-accent);
    border-radius: 20px;
    padding: 4px 10px;
    font-size: 0.55rem;
    font-weight: 500;
    color: var(--theme-calculator-accent);
    cursor: pointer;
    animation: pulse-green 1.5s infinite;
}
.selected-variable-tag i {
    font-size: 0.48rem;
    color: var(--theme-calculator-accent);
}
.selected-variable-tag:hover {
    background: var(--theme-calculator-accent);
    color: white;
}
.selected-variable-tag:hover i {
    color: white;
}

/* Formula variables container */
.formula-variables {
    background: rgba(255,255,255,0.8);
    border-radius: 6px;
    padding: 12px;
    border: 2px dashed rgba(0,168,0,0.3);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-normal);
    flex: 1;
    min-height: 200px;
}
.formula-variables:hover {
    border: 2px solid rgba(0,168,0,0.5);
    box-shadow: var(--glow-box-hover-green);
}

/* Responsive adjustments */
@media (max-width: 991px) {
    .calculator-grid {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    .calculator-right-column {
        height: auto;
    }
    .formula-calculator-card {
        grid-column: 1;
    }
    .formula-calculator-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
    }
    .toolbox-section, .values-section, .variables-container {
        grid-column: 1;
    }
    .variables-grid {
        grid-template-columns: 1fr;
    }
    .product-info-two-columns {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    .formula-header {
        flex-wrap: wrap;
    }
}

/* Calculation result display */
.calculation-result-area {
    margin-top: 12px;
    padding: 10px;
    background: #f5f5f5;
    border-radius: 4px;
    border-left: 3px solid var(--theme-calculator-accent);
    font-size: 0.8rem;
}
.calculation-result-area .result-title {
    font-weight: 600;
    color: var(--theme-calculator-accent);
    margin-bottom: 5px;
}
#result-section {
    padding: 12px;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}
#result-section h4 {
    margin: 0 0 10px 0;
    font-size: 0.85rem;
    color: var(--theme-calculator-accent);
    flex-shrink: 0;
}
#calculation-result {
    flex: 1 1 auto;
    overflow-y: auto;
    min-height: 0;
}
#result-section h4 {
    margin: 0 0 10px 0;
    font-size: 0.85rem;
    color: var(--theme-calculator-accent);
}
.calculation-result-area .result-item {
    display: flex;
    align-items: baseline;
    padding: 4px 0;
    border-bottom: 1px solid #eee;
    font-size: 0.8rem;
    gap: 6px;
}
.calculation-result-area .result-header {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--theme-calculator-accent);
    border-bottom: 2px solid var(--theme-calculator-accent);
    padding-bottom: 6px;
    margin-bottom: 4px;
}
.calculation-result-area .result-label {
    flex: 0 0 auto;
    min-width: 90px;
    font-weight: 600;
    color: #444;
}
.calculation-result-area .result-note {
    flex: 1 1 auto;
    font-size: 0.7rem;
    color: #999;
    text-align: left;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.calculation-result-area .result-value {
    flex: 0 0 auto;
    text-align: right;
    font-weight: 700;
    color: var(--theme-calculator-accent);
    min-width: 100px;
}
.calculation-result-area .result-separator {
    border-top: 2px solid var(--theme-calculator-accent);
    margin: 6px 0 0 0;
}
.calculation-result-area .result-section {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--theme-calculator-accent);
    padding: 8px 0 2px 0;
    border-bottom: 1px solid #ddd;
    margin-bottom: 2px;
}
.calculation-result-area .result-cost-per-mt {
    color: var(--theme-calculator-accent);
    font-size: 0.85rem;
}
.calculation-result-area .result-cost-per-mt .result-value {
    font-size: 0.95rem;
}
.calculation-result-area .result-refund {
    color: #2e7d32;
    font-size: 0.85rem;
}
.calculation-result-area .result-refund .result-value {
    font-size: 0.95rem;
}
.calculation-result-area .result-total-row {
    border-top: none;
    border-bottom: none;
    margin-top: 0;
    padding-top: 0;
    font-size: 0.9rem;
}
.calculation-result-area .result-total-row .result-value {
    font-size: 1rem;
}
.calculation-result-area .result-total-row .result-label {
    font-size: 0.9rem;
}
.calculation-result-area .result-empty {
    font-size: 0.75rem;
    color: #999;
    padding: 20px 0;
    text-align: center;
}
.result-formula {
    font-family: monospace;
    font-size: 0.7rem;
    color: #666;
    margin-bottom: 5px;
    word-break: break-word;
}

/* Disabled Calculate button */
.calc-now-values-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: #ccc;
    box-shadow: none;
}
.calc-now-values-btn:disabled:hover {
    background: #ccc;
    box-shadow: none;
}

.save-calculation-section {
    flex-shrink: 0;
    margin-top: auto;
    background: rgba(255,255,255,0.9);
    border-radius: var(--radius-md);
    padding: 12px;
    border: 1px solid rgba(0,168,0,0.2);
}
.save-calculation-section h4 {
    margin: 0 0 10px 0;
    color: var(--theme-calculator-green);
    font-size: 0.9rem;
    padding-bottom: 4px;
}
.save-calculation-section h4 i {
    color: var(--theme-calculator-accent);
}
.save-calculation-fields {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.save-field-item {
    display: flex;
    flex-direction: column;
    gap: 3px;
}
.save-field-item label {
    font-size: 0.75rem;
    font-weight: 500;
    color: #555;
}
.save-input {
    padding: 6px 8px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 0.78rem;
    outline: none;
    transition: border-color 0.2s;
    width: 100%;
    box-sizing: border-box;
}
.save-input:focus {
    border-color: var(--theme-calculator-accent);
}
.save-textarea {
    min-height: 50px;
    resize: vertical;
    font-family: inherit;
}
.save-calculation-btn {
    margin-top: 4px;
    background: #28a745;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 8px 12px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    text-align: center;
}
.save-calculation-btn:hover {
    background: #34ce57;
    box-shadow: 0 2px 8px rgba(40, 167, 69, 0.4);
}
.save-calculation-btn i {
    margin-right: 4px;
}

.fob-inputs-section {
    display: flex;
    flex-direction: column;
    gap: 6px;
    grid-column: 1 / -1;
}
.fob-section-title {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--theme-calculator-green);
    margin-bottom: 2px;
    text-align: center;
}
.fob-section-title i {
    color: var(--theme-calculator-accent);
    margin-right: 4px;
}
.fob-row {
    display: flex;
    flex-direction: row;
    gap: 10px;
}
.fob-row .value-input-item {
    flex: 1;
    min-width: 0;
}
.fob-row .value-input-item input {
    width: 100%;
}
.fob-separator {
    border: none;
    border-top: 2px solid var(--theme-calculator-accent);
    margin: 8px auto 4px auto;
    width: 80%;
}