/* ==============================================
   Sankey Flow Chart Tool - Styles
   Uses CSS variables from main.css for dark/light mode
   ============================================== */

/* ==============================================
   1. Tool Layout & Cards
   ============================================== */
.sankey-tool {
    padding: calc(var(--space-16) + 60px) 0 var(--space-16);
}

.sankey-hero {
    text-align: center;
    margin-bottom: var(--space-10);
}

.sankey-hero h1 {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    line-height: var(--leading-tight);
}

.sankey-hero p {
    font-size: var(--text-lg);
    color: var(--text-secondary);
    max-width: 640px;
    margin: 0 auto;
    line-height: var(--leading-relaxed);
}

.sankey-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    margin-bottom: var(--space-8);
    box-shadow: var(--shadow-sm);
}

.sankey-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-6);
}

.sankey-card-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin: 0;
}

/* ==============================================
   2. Section Headers (Income / Expenses)
   ============================================== */
.sankey-section {
    margin-bottom: var(--space-6);
}

.sankey-section:last-child {
    margin-bottom: 0;
}

.sankey-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
    padding-bottom: var(--space-2);
    border-bottom: 2px solid var(--border);
}

.sankey-section-title {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 0;
}

.sankey-section-total {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
}

/* ==============================================
   3. Form Rows (Income + Standalone Expenses)
   ============================================== */
.sankey-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-2);
    border-radius: var(--radius-md);
    background: var(--background);
    border: 1px solid transparent;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.sankey-row:hover {
    border-color: var(--border);
}

.sankey-row.drag-over {
    border-color: var(--primary);
    background: var(--primary-light);
}

.sankey-row.dragging {
    opacity: 0.5;
}

/* Drag handle */
.sankey-drag-handle {
    cursor: grab;
    color: var(--text-muted);
    padding: var(--space-1);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    user-select: none;
    touch-action: none;
}

.sankey-drag-handle:active {
    cursor: grabbing;
}

.sankey-drag-handle svg {
    width: 16px;
    height: 16px;
}

/* Name input (inline edit) */
.sankey-name-display {
    flex: 1 1 auto;
    min-width: 0;
    max-width: 280px;
    font-size: var(--text-base);
    color: var(--text-primary);
    font-weight: var(--font-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    cursor: default;
}

.sankey-name-input {
    flex: 1;
    min-width: 0;
    font-size: var(--text-base);
    color: var(--text-primary);
    font-weight: var(--font-medium);
    background: var(--surface);
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: var(--space-1) var(--space-2);
    outline: none;
    display: none;
}

.sankey-name-input:focus {
    box-shadow: 0 0 0 2px var(--primary-light);
}

.sankey-row.editing .sankey-name-display {
    display: none;
}

.sankey-row.editing .sankey-name-input {
    display: block;
}

/* Amount input */
.sankey-amount-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex-shrink: 0;
}

.sankey-amount-input {
    width: 110px;
    font-size: var(--text-base);
    color: var(--text-primary);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-1) var(--space-2);
    text-align: right;
    outline: none;
    transition: border-color var(--transition-fast);
}

.sankey-amount-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
}

.sankey-currency {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    flex-shrink: 0;
}

/* Action buttons (edit, delete) */
.sankey-row-actions {
    display: flex;
    gap: var(--space-1);
    flex-shrink: 0;
}

.sankey-btn-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast);
    padding: 0;
}

.sankey-btn-icon:hover {
    color: var(--text-primary);
    background: var(--border-light);
}

.sankey-btn-icon.delete:hover {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.sankey-btn-icon svg {
    width: 16px;
    height: 16px;
}

/* ==============================================
   4. Expense Groups (Oberkategorien)
   ============================================== */
.sankey-group {
    margin-bottom: var(--space-3);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--background);
    overflow: hidden;
}

.sankey-group.drag-over {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
}

.sankey-group.dragging {
    opacity: 0.5;
}

.sankey-group-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--surface-elevated);
    border-bottom: 1px solid var(--border-light);
}

.sankey-group-name-display {
    flex: 1;
    min-width: 0;
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    cursor: default;
}

.sankey-group-name-input {
    flex: 1;
    min-width: 0;
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    background: var(--surface);
    border: 1px solid var(--primary);
    border-radius: var(--radius-sm);
    padding: var(--space-1) var(--space-2);
    outline: none;
    display: none;
}

.sankey-group-header.editing .sankey-group-name-display {
    display: none;
}

.sankey-group-header.editing .sankey-group-name-input {
    display: block;
}

.sankey-group-total {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    font-weight: var(--font-medium);
    flex-shrink: 0;
    margin-right: var(--space-2);
}

/* Children inside group */
.sankey-group-children {
    padding: var(--space-1) 0;
}

.sankey-group-children .sankey-row {
    padding-left: var(--space-8);
    margin: 0 var(--space-1);
    border-radius: var(--radius-sm);
    background: transparent;
}

.sankey-group-children .sankey-row:hover {
    background: var(--surface-elevated);
}

/* Add child button inside group */
.sankey-add-child {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-8);
    font-size: var(--text-sm);
    color: var(--text-muted);
    background: none;
    border: none;
    cursor: pointer;
    width: 100%;
    transition: color var(--transition-fast);
}

.sankey-add-child svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

.sankey-add-child:hover {
    color: var(--primary);
}

/* ==============================================
   5. Add Buttons (Bottom of sections)
   ============================================== */
.sankey-add-row {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-3);
    flex-wrap: wrap;
}

.sankey-btn-add {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--primary);
    background: transparent;
    border: 1px dashed var(--primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sankey-btn-add:hover {
    background: var(--primary-light);
}

.sankey-btn-add svg {
    width: 16px;
    height: 16px;
}

/* ==============================================
   6. Calculate Button
   ============================================== */
.sankey-calculate-btn {
    display: block;
    width: 100%;
    padding: var(--space-4) var(--space-6);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--text-inverse);
    background: var(--primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-top: var(--space-6);
    transition: background var(--transition-fast), transform var(--transition-fast);
}

.sankey-calculate-btn:hover {
    background: var(--primary-hover);
}

.sankey-calculate-btn:active {
    transform: scale(0.99);
}

/* ==============================================
   7. Result Card
   ============================================== */
.sankey-result {
    display: none;
}

.sankey-result.visible {
    display: block;
}

.sankey-result-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.sankey-budget-info h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-2) 0;
}

.sankey-budget-summary {
    font-size: var(--text-base);
    color: var(--text-secondary);
    margin: 0;
}

.sankey-budget-summary.positive {
    color: var(--success);
}

.sankey-budget-summary.negative {
    color: var(--error);
}

/* Result actions (toggle, permalink, export) */
.sankey-result-actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}

.sankey-toggle-group {
    display: flex;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.sankey-toggle-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    background: var(--surface);
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sankey-toggle-btn.active {
    background: var(--primary);
    color: var(--text-inverse);
}

.sankey-toggle-btn:hover:not(.active) {
    background: var(--background);
}

/* Action button styles moved to main.css */

/* ==============================================
   8. SVG Container
   ============================================== */
.sankey-svg-container {
    width: 100%;
    overflow-x: auto;
    margin-bottom: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--background);
}

.sankey-svg-container svg {
    display: block;
    width: 100%;
    height: auto;
    min-height: 400px;
}

/* ==============================================
   9. Summary Tables
   ============================================== */
.sankey-tables {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
}

.sankey-table-section h3 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
    margin: 0 0 var(--space-3) 0;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.sankey-table th,
.sankey-table td {
    padding: var(--space-2) var(--space-3);
    text-align: left;
    font-size: var(--text-sm);
    border-bottom: 1px solid var(--border-light);
}

.sankey-table th {
    color: var(--text-secondary);
    font-weight: var(--font-medium);
    font-size: var(--text-xs);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.sankey-table td {
    color: var(--text-primary);
}

.sankey-table td:nth-child(2),
.sankey-table td:nth-child(3),
.sankey-table th:nth-child(2),
.sankey-table th:nth-child(3) {
    text-align: right;
}

.sankey-table .total-row {
    font-weight: var(--font-semibold);
    border-top: 2px solid var(--border);
}

.sankey-table .total-row td {
    padding-top: var(--space-3);
}

/* ==============================================
   10. SEO Content Section
   ============================================== */
.sankey-seo-content {
    padding: var(--space-16) 0;
}

.sankey-seo-content h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-4) 0;
}

.sankey-seo-content p {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin-bottom: var(--space-4);
    max-width: 720px;
}

/* FAQ Section */
.sankey-faq {
    margin-top: var(--space-10);
}

.sankey-faq h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-6) 0;
}

/* FAQ answer padding (direct p without .faq-answer-content wrapper) */
.sankey-faq .faq-answer p {
    padding: 0 var(--space-6) var(--space-6);
    color: var(--text-secondary);
    line-height: var(--leading-relaxed);
    margin: 0;
    max-width: none;
}

/* Chevron rotation for sankey FAQ (inline SVG, no .faq-icon class) */
.sankey-faq .faq-question svg {
    flex-shrink: 0;
    transition: transform var(--transition-normal);
    color: var(--text-muted);
}

.sankey-faq .faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

/* CTA Section */
.sankey-cta {
    text-align: center;
    padding: var(--space-10) var(--space-8);
    background: var(--primary-light);
    border-radius: var(--radius-xl);
    margin-top: var(--space-10);
}

.sankey-cta h2 {
    font-size: var(--text-2xl);
    font-weight: var(--font-bold);
    color: var(--text-primary);
    margin: 0 0 var(--space-3) 0;
}

.sankey-cta p {
    font-size: var(--text-base);
    color: var(--text-secondary);
    margin: 0 auto var(--space-6);
    max-width: 480px;
}

/* ==============================================
   11. Drag Ghost Element
   ============================================== */
.sankey-drag-ghost {
    position: fixed;
    pointer-events: none;
    z-index: 1000;
    background: var(--surface);
    border: 2px solid var(--primary);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-primary);
    box-shadow: var(--shadow-lg);
    opacity: 0.9;
    transform: translate(-50%, -50%);
}

/* Drop zone indicator */
.sankey-drop-indicator {
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
    margin: 0 var(--space-3);
    transition: opacity var(--transition-fast);
}

/* ==============================================
   12. Two-Column Form Grid (Desktop)
   ============================================== */
.sankey-form-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-6);
}

/* ==============================================
   13. Color Indicator Dots (Expense Categories)
   ============================================== */
.sankey-color-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

/* ==============================================
   14. Savings Rate Badge
   ============================================== */
.sankey-savings-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full, 9999px);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    line-height: 1;
}

.sankey-savings-badge.rate-good {
    background: rgba(16, 185, 129, 0.12);
    color: #10B981;
}

.sankey-savings-badge.rate-mid {
    background: rgba(234, 179, 8, 0.12);
    color: #EAB308;
}

.sankey-savings-badge.rate-low {
    background: rgba(239, 68, 68, 0.12);
    color: #EF4444;
}

/* ==============================================
   15. Unallocated Node (dashed style in SVG)
   ============================================== */
.sankey-node-unallocated rect {
    stroke: var(--text-muted);
    stroke-dasharray: 4 3;
    fill-opacity: 0.4;
}

/* ==============================================
   16. Responsive
   ============================================== */
@media (max-width: 768px) {
    .sankey-tool {
        padding: calc(var(--space-12) + 56px) 0 var(--space-12);
    }

    .sankey-hero h1 {
        font-size: var(--text-2xl);
    }

    .sankey-hero p {
        font-size: var(--text-base);
    }

    .sankey-card {
        padding: var(--space-4);
    }

    .sankey-form-grid {
        grid-template-columns: 1fr;
    }

    .sankey-row {
        flex-wrap: wrap;
        gap: var(--space-1);
    }

    .sankey-name-display,
    .sankey-name-input {
        min-width: 80px;
        max-width: none;
    }

    .sankey-amount-input {
        width: 90px;
    }

    .sankey-group-children .sankey-row {
        padding-left: var(--space-4);
    }

    .sankey-tables {
        grid-template-columns: 1fr;
    }

    .sankey-result-header {
        flex-direction: column;
    }

    .sankey-result-actions {
        flex-wrap: wrap;
        width: 100%;
    }

    .sankey-svg-container svg {
        min-height: 300px;
    }
}

@media (max-width: 480px) {
    .sankey-hero h1 {
        font-size: var(--text-xl);
    }

    .sankey-card {
        padding: var(--space-3);
        border-radius: var(--radius-md);
    }

    .sankey-amount-input {
        width: 80px;
        font-size: var(--text-sm);
    }

    .sankey-section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
    }

    .sankey-result-actions {
        gap: var(--space-1);
    }

    .sankey-action-btn span {
        display: none;
    }
}

/* ==============================================
   17. Sankey Tooltip
   ============================================== */
.sankey-tooltip {
    position: fixed;
    pointer-events: none;
    z-index: 500;
    background: var(--surface-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    box-shadow: var(--shadow-lg);
    white-space: nowrap;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.sankey-tooltip.visible {
    opacity: 1;
}

/* ==============================================
   18. Export Menu
   ============================================== */
.sankey-export-menu {
    position: relative;
}

.sankey-export-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-1);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown);
    min-width: 160px;
    overflow: hidden;
}

.sankey-export-dropdown.open {
    display: block;
}

.sankey-export-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--text-primary);
    background: none;
    border: none;
    width: 100%;
    cursor: pointer;
    text-align: left;
    transition: background var(--transition-fast);
}

.sankey-export-item:hover {
    background: var(--background);
}

/* Export section (font size label + toggle) */
.sankey-export-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
}

.sankey-export-label {
    font-size: var(--text-xs);
    color: var(--text-secondary);
    font-weight: var(--font-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.sankey-fontsize-group {
    display: flex;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.sankey-fontsize-btn {
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--text-secondary);
    background: var(--surface);
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
    min-width: 28px;
    text-align: center;
}

.sankey-fontsize-btn.active {
    background: var(--primary);
    color: var(--text-inverse);
}

.sankey-fontsize-btn:hover:not(.active) {
    background: var(--background);
}

.sankey-export-separator {
    height: 1px;
    background: var(--border);
    margin: 0;
}

/* Currency toggle buttons */
.sankey-currency-btn {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    background: var(--surface);
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.sankey-currency-btn.active {
    background: var(--primary);
    color: var(--text-inverse);
}

.sankey-currency-btn:hover:not(.active) {
    background: var(--background);
}

/* ==============================================
   19. Template Dropdown
   ============================================== */
.sankey-template-bar {
    display: flex;
    align-items: center;
    margin-bottom: var(--space-4);
}

.sankey-template-menu {
    position: relative;
}

.sankey-template-trigger {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--text-secondary);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: color var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}

.sankey-template-trigger:hover {
    color: var(--text-primary);
    border-color: var(--primary);
    background: var(--primary-light);
}

.sankey-template-chevron {
    transition: transform var(--transition-fast);
}

.sankey-template-dropdown.open ~ .sankey-template-trigger .sankey-template-chevron,
.sankey-template-menu:has(.sankey-template-dropdown.open) .sankey-template-chevron {
    transform: rotate(180deg);
}

.sankey-template-dropdown {
    display: none;
    position: absolute;
    top: calc(100% + var(--space-1));
    left: 0;
    min-width: 280px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg, var(--radius-md));
    box-shadow: var(--shadow-lg);
    z-index: var(--z-dropdown, 100);
    overflow: hidden;
    padding: var(--space-1) 0;
}

.sankey-template-dropdown.open {
    display: block;
}

.sankey-template-option {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background var(--transition-fast);
}

.sankey-template-option:hover {
    background: var(--primary-light);
}

.sankey-template-option-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--background);
    color: var(--primary);
    flex-shrink: 0;
}

.sankey-template-option-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sankey-template-option-label {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.sankey-template-option-desc {
    font-size: var(--text-xs);
    color: var(--text-muted);
    line-height: var(--leading-tight, 1.25);
}

/* 21. Confirm Modal -- uses native <dialog>, styles are inline in JS */

/* ==============================================
   22. Print styles
   ============================================== */
@media print {
    .sankey-card:first-of-type {
        display: none;
    }

    .sankey-result {
        display: block !important;
    }

    .sankey-result-actions {
        display: none;
    }

    .sankey-svg-container {
        border: none;
    }
}