:root {
    --bg-color: #ffffff;
    --sidebar-bg: #f8fafc;
    --card-bg: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --accent: #0ea5e9;
    /* Sky 500 */
    --accent-hover: #0284c7;
    /* Sky 600 */
    --accent-contrast: #ffffff;
    --link-color: #0369a1;
    --link-hover: #075985;
    --border-color: #cbd5e1;
    /* Slate 300 */
    --success: #22c55e;
    --table-header-bg: #f1f5f9;
    --table-border: #e2e8f0;
    --table-row-bg: #ffffff;
    --table-row-alt-bg: #f8fafc;
    --table-row-hover-bg: #e0f2fe;
    --table-row-active-bg: #bae6fd;
    --table-root-bg: #eef6ff;
    --hover-bg: #f1f5f9;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-md: 1.125rem;
    --font-size-lg: 1.5rem;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.08);
    --shadow-md: 0 12px 24px rgba(15, 23, 42, 0.12);
    --shadow-sticky: 0 6px 16px rgba(15, 23, 42, 0.08);
    --transition-fast: 160ms ease;
    --transition-base: 220ms ease;
}

* {
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: #cbd5e1 transparent;
}

*::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border: 2px solid transparent;
    border-radius: 999px;
    background-clip: content-box;
}

*::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
    background-clip: content-box;
}

.ui-icon {
    width: 1em;
    height: 1em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    vertical-align: -0.125em;
}

.ui-icon svg {
    width: 100%;
    height: 100%;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

button .ui-icon,
.planning-modal-title .ui-icon {
    margin-right: 0.4rem;
}

button .trailing-icon {
    margin-right: 0;
    margin-left: 0.25rem;
}

button[data-icon],
button[data-icon-only] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

button[data-icon-only] .ui-icon {
    margin-right: 0;
}

[data-icon],
[data-icon-only],
.toggle-icon,
.gantt-toggle {
    align-items: center;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
}

:where(a, button, input, select, textarea, [tabindex], [contenteditable="true"]):focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.18);
}

a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: 500;
}

a:hover,
a:focus-visible {
    color: var(--link-hover);
    text-decoration: none;
}

button {
    font-family: inherit;
    color: inherit;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
}

.is-hidden {
    display: none !important;
}

.text-right {
    text-align: right;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

/* Header */
.main-header {
    background-color: var(--bg-color);
    padding: 1rem 2rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 70px;
    height: auto;
    gap: var(--space-4);
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
    z-index: 20;
}

.logo {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    color: var(--accent);
}

.logo:hover,
.logo:focus-visible {
    text-decoration: none;
}

.logo-image {
    display: block;
    width: auto;
    height: clamp(2rem, 5vw, 2.8rem);
    max-width: min(220px, 48vw);
    object-fit: contain;
    transition: filter var(--transition-fast), opacity var(--transition-fast);
}

.upload-area form {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    flex-wrap: wrap;
    justify-content: flex-end;
}

button.mobile-actions-toggle {
    display: none;
}

.mobile-primary-upload {
    display: none;
}

.header-actions-menu {
    display: contents;
}

.header-action-group {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding-right: 0.75rem;
    border-right: 1px solid var(--border-color);
}

.header-action-group-last {
    padding-right: 0;
    border-right: 0;
}

.btn {
    min-height: 2.25rem;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    padding: 0.5rem 0.9rem;
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1;
    cursor: pointer;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast), transform 80ms ease;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0) scale(0.98);
}

.btn-primary {
    background-color: var(--accent);
    border-color: var(--accent);
    color: var(--accent-contrast);
}

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

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

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

.btn-success {
    background-color: var(--success);
    border-color: var(--success);
    color: #ffffff;
}

.btn-success:hover {
    background-color: #16a34a;
    border-color: #16a34a;
}

.btn-danger {
    background-color: #dc2626;
    border-color: #dc2626;
    color: #ffffff;
}

.btn-danger:hover {
    background-color: #b91c1c;
    border-color: #b91c1c;
}

.btn-ghost {
    background-color: transparent;
    color: var(--text-primary);
}

.upload-btn {
    min-width: 200px;
    max-width: 280px;
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.upload-btn:hover {
    color: var(--accent-contrast);
}

.process-btn {
    background-color: var(--accent);
    color: var(--accent-contrast);
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast), transform 80ms ease;
}

.process-btn:hover {
    background-color: var(--accent-hover);
}

.project-info {
    text-align: right;
}

.project-stats {
    margin-top: var(--space-1);
    color: var(--text-secondary);
    font-size: var(--font-size-xs);
    line-height: 1.35;
}

.project-info h1 {
    font-size: 0.9rem;
    margin: 0;
    font-weight: 500;
}

.project-info .meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Main Content Area */
.content-area {
    flex: 1;
    display: flex;
    flex-direction: row;
    overflow: hidden;
    position: relative;
    background-color: var(--bg-color);
    min-height: 0;
    /* Critical for nested flex scrolling */
}

body.is-processing .content-area::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    height: 3px;
    width: 35%;
    background: var(--accent);
    border-radius: 0 999px 999px 0;
    z-index: 31;
    animation: loadingBar 1s ease-in-out infinite;
}

body.is-processing .content-area::after {
    content: "Procesando archivo...";
    position: absolute;
    inset: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(248, 250, 252, 0.72);
    color: var(--text-primary);
    font-weight: 700;
    backdrop-filter: blur(2px);
    pointer-events: none;
}

/* Tree Panel takes full height now */
.tree-panel {
    flex: 1;
    overflow: hidden;
    /* Remove scroll from parent */
    display: flex;
    flex-direction: column;
    min-height: 0;
    /* Critical for nested flex scrolling */
}

#treeContent {
    flex: 1;
    overflow-y: auto;
    /* Scroll is here */
    display: block;
    /* Flex might cause issues with sticky if not careful, but block is safer for list */
    /* Height is now flex-managed */
}

/* Search Bar */
.search-bar-container {
    padding: 0.5rem 1rem;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 12;
}

.search-bar-container input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 0.9rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-bar-container input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(14, 165, 233, 0.1);
}

/* Panel de detalles lateral (escritorio), redimensionable con el divisor */
.details-panel {
    display: none;
    flex-direction: column;
    flex-shrink: 0;
    width: var(--details-panel-width, 30rem);
    min-width: 300px;
    max-width: 65%;
    overflow-y: auto;
    background-color: var(--sidebar-bg);
}

.content-area.details-open .details-panel {
    display: flex;
}

.panel-divider {
    display: none;
    flex-shrink: 0;
    width: 5px;
    cursor: col-resize;
    background-color: var(--border-color);
    transition: background-color var(--transition-fast);
    touch-action: none;
}

.content-area.details-open .panel-divider {
    display: block;
}

.panel-divider:hover,
.panel-divider:focus-visible,
.panel-divider.dragging {
    background-color: var(--accent);
    outline: none;
}

.details-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-2) var(--space-3);
    padding: var(--space-4);
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 5;
}

.details-header h2 {
    flex-basis: 100%;
    margin: 0;
    font-size: 1.05rem;
    line-height: 1.35;
    color: var(--text-primary);
}

.code-badge {
    padding: 2px 8px;
    background-color: var(--table-header-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--text-secondary);
}

.details-header .price-tag {
    margin-left: auto;
    font-size: var(--font-size-base);
    font-weight: 700;
    color: var(--text-primary);
}

.details-close-btn {
    background: none;
    border: none;
    padding: var(--space-1);
    cursor: pointer;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-base);
}

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

.details-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
    padding: var(--space-4);
}

.details-body .section h3 {
    margin: 0 0 var(--space-2);
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
}

.description-box {
    padding: var(--space-3);
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    line-height: 1.55;
    color: var(--text-secondary);
    white-space: pre-wrap;
}

@media (max-width: 768px) {

    .details-panel,
    .panel-divider {
        display: none !important;
    }
}

/* Tree Grid Headers */
.tree-header {
    display: grid;
    /* 
       Updated Layout (Merged Hierarchy):
       Code: 190px (Includes indent and icon)
       Unit: 40px
       Summary: 1fr
       Quantity: 80px
       Price: 110px
       Amount: 110px
    */
    grid-template-columns: 190px 40px 1fr 80px 150px 150px;
    background-color: var(--table-header-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 600;
    box-shadow: var(--shadow-sticky);
}

.tree-header div {
    padding: 8px 12px;
    border-right: 1px solid var(--border-color);
    position: relative;
}

.tree-header div:nth-child(4),
.tree-header div:nth-child(5),
.tree-header div:nth-child(6) {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* ... resize handle ... */

/* Grid Tree Node */
.tree-node-row {
    display: grid;
    grid-template-columns: 190px 40px 1fr 80px 150px 150px;
    align-items: center;
    border-bottom: 1px solid var(--table-border);
    cursor: pointer;
    transition: background-color var(--transition-fast), box-shadow var(--transition-fast), color var(--transition-fast);
    font-size: 0.9rem;
    line-height: 1.35;
    color: var(--text-secondary);
    background-color: var(--table-row-bg);
}

.tree-node-row:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
    box-shadow: none;
}

/* Row types - Visual hierarchy */
.tree-node-row.node-chapter,
.tree-node-row.node-subchapter {
    font-weight: 600; /* Bold for chapters and subchapters */
}

.tree-node-row.node-chapter {
    background-color: var(--table-root-bg);
    color: var(--text-primary);
    box-shadow: inset 3px 0 0 var(--accent);
}

.tree-node-row.node-subchapter {
    color: var(--text-primary);
}

.tree-node-row.node-item {
    font-weight: 400; /* Normal weight for regular items */
}

.tree-node-container:nth-child(even) > .tree-node-row.node-item {
    background-color: var(--table-row-alt-bg);
}

.tree-node-row:hover {
    background-color: var(--table-row-hover-bg);
    color: var(--text-primary);
}

.tree-node-row.active {
    background-color: var(--table-row-active-bg);
    color: var(--text-primary);
    box-shadow: inset 3px 0 0 var(--accent);
}

/* Removed col-hierarchy styles */


.col-code {
    padding: 7px 8px;
    border-right: 1px solid var(--table-border);
    white-space: nowrap;
    overflow: hidden;
    /* Might clip long codes if deeply indented, but text-overflow helps */
    text-overflow: ellipsis;
    font-family: inherit;
    display: flex;
    /* Flex to align icon and text */
    align-items: center;
}

.col-unit,
.col-quantity,
.col-price,
.col-amount {
    padding: 7px 10px;
    border-right: 1px solid var(--table-border);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-family: inherit;
}

.col-summary {
    padding: 7px 10px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    border-right: 1px solid var(--table-border);
    outline: none;
    transition: all 0.2s;
}
.inline-editable {
    cursor: text;
}
.inline-editable:hover {
    background-color: var(--hover-bg);
}
.col-summary[contenteditable="true"]:hover {
    background-color: var(--hover-bg);
    box-shadow: inset 0 0 0 1px var(--accent);
    border-radius: 4px;
}
.col-summary[contenteditable="true"]:focus {
    background-color: var(--bg-color);
    box-shadow: 0 0 0 2px var(--accent);
    border-radius: 4px;
    color: var(--text-primary);
    font-weight: 500;
}

.col-quantity,
.col-price,
.col-amount {
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
}

.col-amount {
    font-weight: 600;
    color: var(--text-primary);
}

.tree-node-children {
    display: none;
    flex-direction: column;
}

.tree-node-children.visible {
    display: flex;
    animation: expandFade var(--transition-base);
}

/* Measurement Table Styles */
.measurements-container {
    padding: 12px 20px 12px 40px;
    background-color: var(--table-row-alt-bg);
    /* Light gray background for details */
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
}

.measurements-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    color: var(--text-secondary);
    background-color: var(--table-row-bg);
    border: 1px solid var(--border-color);
}

.decomposition-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background-color: var(--table-row-bg);
    border: 1px solid var(--border-color);
}

.decomposition-table-wrapper {
    overflow-x: auto;
}

.decomposition-table th,
.decomposition-table td,
.measurements-table th,
.measurements-table td {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    text-align: left;
    line-height: 1.4;
}

.decomposition-table th,
.measurements-table th {
    background-color: var(--table-header-bg);
    font-weight: 600;
    color: var(--text-primary);
}

.decomposition-table tbody tr:nth-child(even),
.measurements-table tbody tr:nth-child(even) {
    background-color: var(--table-row-alt-bg);
}

.decomposition-table tbody tr:hover,
.measurements-table tbody tr:hover {
    background-color: var(--table-row-hover-bg);
    color: var(--text-primary);
}

.decomposition-table td:nth-child(2),
.decomposition-table td:nth-child(4),
.decomposition-table td:nth-child(5),
.decomposition-table th:nth-child(2),
.decomposition-table th:nth-child(4),
.decomposition-table th:nth-child(5),
.measurements-table td.numeric {
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
}

.decomposition-table tfoot td {
    background-color: var(--table-header-bg);
    border-top: 2px solid var(--border-color);
    color: var(--text-primary);
    font-weight: 700;
}

.table-empty-cell {
    text-align: center;
    color: var(--text-secondary);
}

.price-tag,
#detTotalCost,
.budget-total {
    font-variant-numeric: tabular-nums;
    font-feature-settings: "tnum" 1;
}

.measurements-table tr.total-row td {
    background-color: var(--table-header-bg);
    font-weight: 700;
    color: var(--text-primary);
    border-top: 2px solid var(--border-color);
}

/* Empty State */
.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    background-color: var(--bg-color);
    padding: var(--space-6);
}

.empty-card {
    width: min(720px, 100%);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--sidebar-bg);
    box-shadow: var(--shadow-sm);
    padding: clamp(var(--space-5), 5vw, 3rem);
    text-align: center;
}

.empty-icon {
    width: 4rem;
    height: 4rem;
    margin: 0 auto var(--space-4);
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--table-row-hover-bg);
    color: var(--accent);
    font-size: 2rem;
}

.empty-card h1 {
    max-width: 620px;
    margin: 0 auto var(--space-3);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    line-height: 1.2;
}

.empty-card p {
    max-width: 620px;
    margin: 0 auto var(--space-5);
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.6;
}

.empty-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-bottom: var(--space-4);
}

.empty-actions .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.empty-drop-hint {
    margin-top: var(--space-3);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

/* Description Row handled by JS inline styles currently, 
   but preserved comment for future refactoring */

/* Toggle Icon */
.toggle-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    transition: transform 0.2s;
    font-size: 0.8rem;
    cursor: pointer;
    color: var(--text-secondary);
}

.toggle-icon.expanded {
    transform: rotate(90deg);
}

/* Breadcrumb Navigation */
.breadcrumb-container {
    padding: 0.75rem 1rem;
    background-color: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.breadcrumb-back {
    background-color: var(--accent);
    color: var(--accent-contrast);
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.2s;
    white-space: nowrap;
}

.breadcrumb-back:hover {
    background-color: var(--accent-hover);
}

.breadcrumb-path {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-secondary);
    overflow-x: auto;
}

.breadcrumb-item {
    cursor: pointer;
    color: var(--accent);
    transition: color 0.2s;
    white-space: nowrap;
}

.breadcrumb-item:hover {
    color: var(--accent-hover);
    text-decoration: none;
}

.breadcrumb-separator {
    color: var(--text-secondary);
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 500;
}

/* Mobile Drill-Down Styles */
.tree-node-row.has-children-mobile {
    position: relative;
    /* Navigation arrow removed for cleaner mobile interface */
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {

    html,
    body {
        touch-action: manipulation;
        -webkit-text-size-adjust: 100%;
        text-size-adjust: 100%;
    }

    /* Header adjustments */
    .main-header {
        display: grid;
        grid-template-columns: minmax(0, 1fr);
        justify-items: stretch;
        height: auto;
        padding: 0.75rem;
        gap: 0.75rem;
    }

    .logo {
        justify-content: flex-start;
    }

    .logo-image {
        height: 2.15rem;
        max-width: min(190px, 58vw);
    }

    .upload-area form {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        width: 100%;
        gap: 0.5rem;
        align-items: stretch;
        position: relative;
    }

    button.mobile-actions-toggle {
        display: inline-flex;
        justify-content: center;
        width: 100%;
        min-width: 8.5rem;
    }

    .mobile-primary-upload {
        display: inline-flex;
        justify-content: center;
    }

    .header-actions-menu {
        position: absolute;
        top: calc(100% + 0.5rem);
        right: 0;
        z-index: 1100;
        display: none;
        width: min(22rem, 100%);
        padding: 0.65rem;
        background: var(--bg-color);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        box-shadow: var(--shadow-md);
    }

    .upload-area form.actions-open .header-actions-menu {
        display: grid;
        gap: 0.5rem;
    }

    .header-actions-menu .upload-btn {
        display: none;
    }

    .header-action-group {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        width: 100%;
        justify-content: stretch;
        padding-right: 0;
        padding-bottom: 0.5rem;
        border-right: 0;
        border-bottom: 1px solid var(--border-color);
        flex-wrap: wrap;
        grid-column: 1 / -1;
    }

    .header-action-group-last {
        display: flex;
        padding-bottom: 0;
        border-bottom: 0;
        justify-content: center;
    }

    .header-action-group[aria-label="Archivo"] {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .header-action-group[aria-label="Exportar"] {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .upload-btn {
        width: 100%;
        min-width: auto;
        max-width: none;
        grid-column: 1;
    }

    .process-btn,
    .header-action-group .btn {
        width: 100%;
        min-width: 0;
    }

    .header-action-group .btn.theme-toggle-btn {
        width: 2.25rem;
    }

    button,
    .btn,
    input,
    select,
    textarea,
    .tree-node-row,
    .inline-editable,
    [contenteditable="true"],
    .breadcrumb-back,
    .coeffs-toggle-btn {
        touch-action: manipulation;
    }

    input,
    select,
    textarea,
    [contenteditable="true"],
    .inline-editable.is-editing {
        font-size: 16px !important;
    }

    .inline-editable {
        cursor: default;
        -webkit-user-select: none;
        user-select: none;
    }

    .inline-editable:hover {
        background: transparent;
    }

    .inline-editable.is-editing,
    .inline-editable[contenteditable="true"] {
        cursor: text;
        -webkit-user-select: text;
        user-select: text;
        font-size: 18px !important;
        background: var(--bg-color);
        box-shadow: inset 0 0 0 2px var(--accent);
        border-radius: 4px;
    }
 
    .project-info {
        text-align: left;
        width: 100%;
    }

    .project-info h1 {
        font-size: 0.85rem;
    }

    .project-info .meta {
        font-size: 0.7rem;
    }

    #treeContent.mobile-drilldown {
        overflow-x: hidden;
        background: var(--bg-color);
    }

    .ipod-stage {
        position: relative;
        overflow: hidden;
        width: 100%;
    }

    .ipod-panel {
        width: 100%;
        will-change: transform, opacity;
    }

    .ipod-panel-forward {
        animation: ipodSlideInForward 180ms ease-out;
    }

    .ipod-panel-back {
        animation: ipodSlideInBack 180ms ease-out;
    }

    /* Hide table header in iPod-style navigation */
    .tree-header {
        display: none;
    }

    .tree-node-row {
        position: relative;
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        grid-template-rows: auto auto;
        gap: 0.15rem 0.75rem;
        min-height: max(3.65rem, 44px); /* objetivo táctil mínimo garantizado */
        padding: 0.7rem 2.25rem 0.7rem 0.75rem;
        border-bottom: 1px solid var(--border-color);
        background: var(--bg-color);
        align-items: center;
    }

    /* Hide Unit and Quantity columns */
    .col-unit,
    .col-quantity {
        display: none;
    }

    /* Adjust remaining columns */
    .col-code {
        grid-column: 1;
        grid-row: 1;
        min-width: 0;
        font-weight: 700;
    }

    .col-summary {
        display: block;
        grid-column: 1;
        grid-row: 2;
        min-width: 0;
        padding-left: 8px;
        color: var(--text-secondary);
        font-size: 0.82rem;
        line-height: 1.25;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .col-price {
        display: none;
    }

    .col-amount {
        grid-column: 2;
        grid-row: 1 / 3;
        text-align: right;
        align-self: center;
        font-weight: 700;
        white-space: nowrap;
    }

    /* Adjust code column padding for mobile */
    .col-code {
        padding-left: 8px !important;
    }

    /* Hide toggle icon in drill-down mode */
    .mobile-drilldown .toggle-icon {
        display: none;
    }

    .tree-node-row.has-children-mobile::after {
        content: "";
        position: absolute;
        right: 0.9rem;
        top: 50%;
        width: 0.55rem;
        height: 0.55rem;
        border-top: 2px solid var(--text-secondary);
        border-right: 2px solid var(--text-secondary);
        transform: translateY(-50%) rotate(45deg);
    }

    .tree-node-row.has-children-mobile:active {
        background: var(--hover-bg);
    }

    /* Breadcrumb adjustments */
    .breadcrumb-container {
        position: sticky;
        top: 0;
        z-index: 12;
        display: grid;
        grid-template-columns: 7.25rem minmax(0, 1fr) 2rem;
        padding: 0.55rem 0.75rem;
        gap: 0.5rem;
        background: var(--bg-color);
    }

    .breadcrumb-back {
        justify-self: start;
        min-width: 6.5rem;
        min-height: 2.75rem; /* 44px: objetivo táctil mínimo */
        padding: 0.45rem 0.7rem;
        background: transparent;
        color: var(--accent);
        border: 0;
        font-size: 0.86rem;
        font-weight: 700;
    }

    .breadcrumb-path {
        justify-content: center;
        grid-column: 2;
        min-width: 0;
        overflow: hidden;
        text-align: center;
        white-space: nowrap;
        text-overflow: ellipsis;
        font-size: 0.9rem;
        font-weight: 800;
        color: var(--text-primary);
    }

    /* Search bar */
    .search-bar-container {
        padding: 0.5rem;
    }

    .search-bar-container input {
        font-size: 0.85rem;
        padding: 6px 10px;
    }

    /* Measurements table - make scrollable */
    .measurements-container {
        padding: 10px;
        overflow-x: auto;
    }

    .measurements-table {
        font-size: 0.75rem;
        min-width: 500px;
    }

    .measurements-table th,
    .measurements-table td {
        padding: 4px 8px;
    }
}

/* ==========================================================================
   Nuevas Mejoras: Botones, Modo Oscuro, Badges y Edición Interactiva
   ========================================================================== */

/* Botones de Guardar y PDF */
.save-btn {
    background-color: #16a34a; /* Verde */
    color: #ffffff;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}
.save-btn:hover {
    background-color: #15803d;
}
.save-btn:active {
    transform: scale(0.97);
}

.pdf-btn {
    background-color: #800020; /* Granate */
    color: #ffffff;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}
.pdf-btn:hover {
    background-color: #5c0017;
}
.pdf-btn:active {
    transform: scale(0.97);
}

.theme-toggle-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 6px;
    transition: background-color 0.2s, border-color 0.2s;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.theme-toggle-btn:hover {
    background-color: var(--hover-bg);
}

/* Total del presupuesto */
.budget-total {
    font-size: 1.1rem;
    font-weight: 700;
    color: #16a34a; /* Verde */
    margin-top: 4px;
    transition: color 0.2s;
}

/* Celdas de precios editables */
.col-price {
    outline: none;
    transition: all 0.2s;
}
.col-price[contenteditable="true"]:hover {
    background-color: var(--hover-bg);
    box-shadow: inset 0 0 0 1px var(--accent);
    border-radius: 4px;
}
.col-price[contenteditable="true"]:focus {
    background-color: var(--bg-color);
    box-shadow: 0 0 0 2px var(--accent);
    border-radius: 4px;
    color: var(--text-primary);
    font-weight: 600;
}

/* Badges de tipos de recurso */
.badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 6px;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: 4px;
    margin-left: 6px;
    text-transform: uppercase;
    vertical-align: middle;
}
.badge-mo {
    background-color: #fee2e2;
    color: #ef4444;
}
.badge-maq {
    background-color: #fef3c7;
    color: #d97706;
}
.badge-mat {
    background-color: #dbeafe;
    color: #3b82f6;
}
.badge-sub {
    background-color: #f3e8ff;
    color: #a855f7;
}

/* Drag & Drop Overlay */
.drag-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(15, 23, 42, 0.6);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(4px);
    transition: opacity 0.2s;
}
.drag-overlay-box {
    background-color: var(--bg-color);
    border: 3px dashed var(--accent);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    animation: pulseOverlay 2s infinite;
}
.drag-overlay-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent);
}
.drag-overlay-text {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}
@keyframes pulseOverlay {
    0%, 100% {
        border-color: var(--accent);
        transform: scale(1);
    }
    50% {
        border-color: var(--accent-hover);
        transform: scale(1.02);
    }
}

.notification-container {
    position: fixed;
    right: var(--space-4);
    bottom: var(--space-4);
    z-index: 4000;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: var(--space-2);
    pointer-events: none;
}

.toast {
    max-width: min(360px, calc(100vw - 2rem));
    padding: 0.7rem 0.95rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    background: var(--text-primary);
    color: var(--bg-color);
    box-shadow: var(--shadow-md);
    font-size: var(--font-size-sm);
    font-weight: 700;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.toast-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Modo Oscuro */
body.dark-theme {
    --bg-color: #000000;
    --sidebar-bg: #050505;
    --card-bg: #101010;
    --text-primary: #ffffff;
    --text-secondary: #b8b8b8;
    --accent: #38bdf8;
    --accent-hover: #7dd3fc;
    --accent-contrast: #082f49;
    --link-color: #7dd3fc;
    --link-hover: #bae6fd;
    --border-color: #262626;
    --table-header-bg: #080808;
    --table-border: #242424;
    --table-row-bg: #000000;
    --table-row-alt-bg: #070707;
    --table-row-hover-bg: #121212;
    --table-row-active-bg: #1a1a1a;
    --table-root-bg: #0d0d0d;
    --hover-bg: #111111;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 12px 24px rgba(0, 0, 0, 0.4);
    --shadow-sticky: 0 8px 20px rgba(0, 0, 0, 0.28);
}

body.dark-theme .logo-image {
    filter: brightness(0) invert(1);
}

body.dark-theme * {
    scrollbar-color: #4a4a4a transparent;
}

body.dark-theme *::-webkit-scrollbar-thumb {
    background: #4a4a4a;
    background-clip: content-box;
}

body.dark-theme *::-webkit-scrollbar-thumb:hover {
    background: #666666;
    background-clip: content-box;
}

body.dark-theme.is-processing .content-area::after {
    background: rgba(0, 0, 0, 0.78);
}

body.dark-theme .tree-node-row {
    background-color: var(--table-row-bg);
    color: #f2f2f2;
}
body.dark-theme .tree-node-row:hover {
    background-color: var(--table-row-hover-bg);
}
body.dark-theme .tree-node-row.node-chapter {
    background-color: var(--table-root-bg);
}
body.dark-theme .tree-node-row.active {
    background-color: var(--table-row-active-bg);
}
body.dark-theme .measurements-container {
    background-color: var(--table-row-alt-bg);
}
body.dark-theme .decomposition-table,
body.dark-theme .measurements-table {
    background-color: var(--table-row-bg);
}
body.dark-theme .decomposition-table td,
body.dark-theme .measurements-table td {
    color: #d4d4d4;
}
body.dark-theme .upload-btn {
    background-color: #050505;
    color: #f2f2f2;
}
body.dark-theme .upload-btn:hover {
    background-color: #141414;
}
body.dark-theme .search-bar-container input {
    background-color: #050505;
    color: #ffffff;
}
body.dark-theme .search-bar-container input:focus {
    background-color: #000000;
}
body.dark-theme .budget-total {
    color: #4ade80;
}
body.dark-theme .badge-mo {
    background-color: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}
body.dark-theme .badge-maq {
    background-color: rgba(217, 119, 6, 0.2);
    color: #fde047;
}
body.dark-theme .badge-mat {
    background-color: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
}
body.dark-theme .badge-sub {
    background-color: rgba(168, 85, 247, 0.2);
    color: #e9d5ff;
}

/* Footer Banner */
.app-footer {
    background-color: var(--sidebar-bg);
    padding: 0.5rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    height: 40px;
    z-index: 5;
}

.footer-license {
    color: var(--text-primary);
    font-weight: 600;
}

.footer-license-link {
    color: var(--link-color);
    font-weight: 700;
}

.footer-version {
    color: var(--text-secondary);
}

.footer-links {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}
.footer-links a {
    color: var(--link-color);
    font-weight: 600;
    transition: color var(--transition-fast);
}
body.dark-theme .app-footer {
    background-color: #050505;
    border-top: 1px solid #262626;
    color: #b8b8b8;
}

@media (max-width: 768px) {
    .app-footer {
        height: auto;
        min-height: 40px;
        padding: 0.4rem 0.75rem;
        flex-direction: column;
        justify-content: center;
        gap: 0.15rem;
        text-align: center;
        line-height: 1.25;
    }
    .footer-links {
        justify-content: center;
        gap: 0.45rem 0.75rem;
    }
}

@media (max-width: 480px) {
    .main-header {
        padding: 0.75rem;
        gap: 0.75rem;
    }

    .header-action-group[aria-label="Archivo"],
    .header-action-group[aria-label="Exportar"] {
        grid-template-columns: 1fr;
    }

    .notification-container {
        right: var(--space-3);
        left: var(--space-3);
        bottom: var(--space-3);
        align-items: stretch;
    }

    .toast {
        max-width: none;
    }
}

:where(a, button, input, select, textarea, [tabindex], [contenteditable="true"]):focus-visible {
    outline: 2px solid var(--accent) !important;
    outline-offset: 2px !important;
    box-shadow: 0 0 0 4px rgba(14, 165, 233, 0.18) !important;
}

@media print {
    @page {
        size: A4 portrait;
        margin: 12mm;
    }

    :root {
        --bg-color: #ffffff;
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-color: #cccccc;
        --table-border: #dddddd;
        --table-header-bg: #eeeeee;
        --table-row-bg: #ffffff;
        --table-row-alt-bg: #ffffff;
        --table-root-bg: #f4f4f4;
    }

    body {
        height: auto;
        overflow: visible;
        background: #ffffff;
        color: #000000;
        font-size: 9pt;
    }

    .main-header,
    .search-bar-container,
    .filter-bar,
    .breadcrumb-container,
    .app-footer,
    .details-panel,
    .panel-divider,
    .drag-overlay,
    .modal,
    .planning-modal-overlay,
    .coeffs-panel,
    .notification-container,
    .empty-state {
        display: none !important;
    }

    .app-container,
    .content-area,
    .tree-panel,
    #treeContent {
        display: block !important;
        height: auto !important;
        min-height: 0 !important;
        overflow: visible !important;
        background: #ffffff !important;
    }

    .tree-header,
    .tree-node-row {
        display: grid !important;
        grid-template-columns: 26mm 12mm 1fr 20mm 24mm 28mm !important;
        break-inside: avoid;
        page-break-inside: avoid;
        box-shadow: none !important;
        color: #000000 !important;
    }

    .tree-header {
        position: static;
        border: 1px solid #bbbbbb;
        font-size: 8pt;
    }

    .tree-node-row {
        border-bottom: 1px solid #dddddd;
        cursor: default;
        font-size: 8pt;
    }

    .tree-node-children {
        display: flex !important;
    }

    .col-code,
    .col-unit,
    .col-summary,
    .col-quantity,
    .col-price,
    .col-amount,
    .tree-header div {
        padding: 2.5mm 2mm;
        overflow: visible;
        white-space: normal;
        border-right: 1px solid #dddddd;
    }

    .measurements-container,
    .decomposition-table-wrapper {
        display: none !important;
    }

    .toggle-icon,
    .gantt-toggle,
    .badge {
        display: none !important;
    }
}

.changelog-page {
    height: auto;
    min-height: 100vh;
    overflow-x: hidden;
    overflow-y: auto;
    background: var(--bg-color);
    color: var(--text-primary);
}
.changelog-shell {
    width: min(980px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 3rem 0 4rem;
}
.changelog-header {
    margin-bottom: 2rem;
}
.back-link {
    display: inline-flex;
    align-items: center;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
    font-weight: 700;
}
.changelog-kicker {
    margin: 0 0 0.4rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
}
.changelog-header h1 {
    margin: 0 0 0.6rem;
    font-size: 2.3rem;
}
.changelog-header p {
    max-width: 680px;
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}
.changelog-content {
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    box-shadow: var(--shadow-md);
}
.changelog-content h1 {
    margin: 0 0 1rem;
    font-size: 1.8rem;
}
.changelog-content h2 {
    margin: 2rem 0 0.75rem;
    padding-top: 0.5rem;
    font-size: 1.35rem;
    color: var(--primary-dark);
}
.changelog-content h3 {
    margin: 1.25rem 0 0.5rem;
    font-size: 1rem;
}
.changelog-content p,
.changelog-content li {
    color: var(--text-secondary);
    line-height: 1.65;
}
.changelog-content ul {
    margin: 0.35rem 0 1rem;
    padding-left: 1.25rem;
}
.changelog-content li + li {
    margin-top: 0.45rem;
}
.changelog-content hr {
    margin: 1.5rem 0;
    border: 0;
    border-top: 1px solid var(--border-color);
}
.changelog-content code {
    padding: 0.1rem 0.35rem;
    border-radius: 4px;
    background: var(--hover-bg);
    color: var(--text-primary);
    font-size: 0.92em;
}
.reference-link {
    margin: 0.25rem 0;
    font-size: 0.9rem;
}

/* ==========================================================================
   Estilos de Nuevas Funcionalidades Profesionales (Excel, PDF, Comparar, Coeffs)
   ========================================================================== */

/* Botones Nuevos */
.excel-btn {
    background-color: #1d6f42; /* Verde Excel */
    color: #ffffff;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}
.excel-btn:hover {
    background-color: #185c37;
}
.excel-btn:active {
    transform: scale(0.97);
}

.compare-btn {
    background-color: #2563eb; /* Azul */
    color: #ffffff;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}
.compare-btn:hover {
    background-color: #1d4ed8;
}
.compare-btn:active {
    transform: scale(0.97);
}

.dashboard-btn {
    background-color: #4f46e5; /* Índigo */
    color: #ffffff;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
}
.dashboard-btn:hover {
    background-color: #4338ca;
}
.dashboard-btn:active {
    transform: scale(0.97);
}

/* Totales y Ajustes Coeficientes en Cabecera */
.budget-totals-container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}
.pec-total {
    color: #16a34a !important; /* Verde */
}
body.dark-theme .pec-total {
    color: #4ade80 !important;
}
.coeffs-toggle-btn {
    background-color: var(--hover-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}
.coeffs-toggle-btn:hover {
    background-color: var(--border-color);
}

/* Panel Coeficientes */
.coeffs-panel {
    background-color: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    animation: slideDown 0.3s ease-out;
}
.coeffs-container {
    max-width: 1200px;
    margin: 0 auto;
}
.coeffs-container h4 {
    margin: 0 0 0.75rem 0;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}
.coeffs-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: flex-end;
}
.coeff-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}
.coeff-field label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
}
.coeff-field input {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    width: 100px;
    font-size: 0.85rem;
    outline: none;
}
.coeff-field input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-light);
}

/* Barra de Filtros Avanzados */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 1.5rem;
    padding: 0.75rem 1.5rem;
    background-color: var(--sidebar-bg);
    border-bottom: 1px solid var(--border-color);
}
.filter-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.filter-group label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}
.filter-btn {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s;
}
.filter-btn:hover {
    background-color: var(--hover-bg);
    border-color: var(--text-secondary);
}
.filter-btn:disabled {
    color: var(--text-secondary);
    border-color: var(--border-color);
}
.filter-btn[data-icon-only] {
    width: 2rem;
    height: 2rem;
    padding: 0;
}
.filter-select {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    outline: none;
}
.filter-select:focus {
    border-color: var(--accent);
}

/* Hoja de filtros: en escritorio los grupos se muestran inline dentro de la barra */
.filter-sheet {
    display: contents;
}

.filter-sheet-header,
.filter-sheet-toggle,
.filter-sheet-backdrop {
    display: none;
}

.filter-count-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 1.15rem;
    height: 1.15rem;
    margin-left: 0.4rem;
    padding: 0 0.3rem;
    background: var(--accent);
    color: #fff;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    line-height: 1;
}

.filter-count-badge.is-hidden {
    display: none;
}

@media (max-width: 768px) {
    /* 1.5: barra compacta de chips + botón "Filtros" que abre una hoja inferior */
    .filter-bar {
        gap: 0.4rem;
        padding: 0.5rem 0.75rem;
    }

    .filter-chips {
        width: 100%;
        flex-wrap: wrap;
        gap: 0.4rem;
    }

    .filter-chips .filter-btn {
        min-height: 2.75rem; /* 44px: objetivo táctil mínimo */
        padding: 0.45rem 0.9rem;
        border-radius: 999px;
    }

    .filter-chips .filter-btn[data-icon-only] {
        width: 2.75rem;
        height: 2.75rem;
        padding: 0;
    }

    .filter-sheet-toggle {
        display: inline-flex;
        align-items: center;
        margin-left: auto;
    }

    .filter-sheet-backdrop {
        position: fixed;
        inset: 0;
        z-index: 1299;
        background: rgba(15, 23, 42, 0.45);
    }

    .filter-sheet {
        display: flex;
        flex-direction: column;
        gap: 1rem;
        position: fixed;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 1300;
        padding: 1rem 1rem calc(1.25rem + env(safe-area-inset-bottom, 0px));
        background: var(--bg-color);
        border-top: 1px solid var(--border-color);
        border-radius: 16px 16px 0 0;
        box-shadow: 0 -8px 30px rgba(15, 23, 42, 0.25);
        transform: translateY(100%);
        visibility: hidden;
        transition: transform 0.2s ease-out, visibility 0.2s;
    }

    .filter-bar:not(.sheet-open) .filter-sheet-backdrop {
        display: none;
    }

    .filter-bar.sheet-open .filter-sheet-backdrop {
        display: block;
    }

    .filter-bar.sheet-open .filter-sheet {
        transform: translateY(0);
        visibility: visible;
    }

    .filter-sheet-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
    }

    .filter-sheet-title {
        font-size: 1rem;
        font-weight: 700;
        color: var(--text-primary);
    }

    .filter-sheet .filter-group {
        display: grid;
        gap: 0.35rem;
    }

    .filter-sheet .filter-select {
        width: 100%;
        min-height: 2.75rem;
    }
}

/* Edición táctil: botón de lápiz explícito (detalle móvil) */
.edit-pencil-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 2.75rem; /* 44px: objetivo táctil mínimo */
    height: 2.75rem;
    padding: 0;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--accent);
    cursor: pointer;
}

.edit-pencil-btn:active {
    background: var(--hover-bg);
}

.edit-pencil-btn .ui-icon {
    width: 1.1rem;
    height: 1.1rem;
    margin-right: 0;
}

.mobile-detail-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.mobile-detail-price-row {
    padding: 0.35rem 0;
}

.mobile-detail-price-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.mobile-detail-price-value {
    flex: 1;
    min-width: 0;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

/* Modales */
.modal {
    position: fixed;
    inset: 0;
    background-color: rgba(15, 23, 42, 0.48);
    backdrop-filter: blur(2px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: var(--space-5);
    animation: modalBackdropIn 0.16s ease-out;
}
.modal-content {
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: 0;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    animation: modalContentIn 0.18s ease-out;
}
.dashboard-modal-content {
    width: 900px;
    max-width: 100%;
}
.compare-modal-content {
    width: 500px;
    max-width: 100%;
}
.close-project-modal-content {
    width: 560px;
    max-width: 100%;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding: var(--space-4) var(--space-5);
    gap: var(--space-4);
}
.modal-header h3 {
    margin: 0;
    color: var(--text-primary);
    font-size: var(--font-size-md);
    font-weight: 600;
}
.close-btn {
    width: 2rem;
    height: 2rem;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text-secondary);
    cursor: pointer;
    line-height: 1;
}
.close-btn:hover {
    background: var(--hover-bg);
    color: var(--text-primary);
}
.modal-body {
    padding: var(--space-5);
}

.close-project-modal-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.close-project-modal-body p {
    margin: 0;
    line-height: 1.55;
}

.close-project-format {
    align-self: flex-start;
    padding: var(--space-1) var(--space-2);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    background: var(--sidebar-bg);
    color: var(--text-primary);
    font-size: var(--font-size-xs);
    font-weight: 700;
}

.close-project-format.is-sysmed {
    border-color: var(--accent);
    color: var(--accent);
}

.close-project-warning {
    padding: var(--space-2) var(--space-3);
    border-left: 3px solid #d97706;
    background: rgba(217, 119, 6, 0.09);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.close-project-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
    flex-wrap: wrap;
    margin-top: var(--space-2);
}

@media (max-width: 560px) {
    .close-project-actions {
        flex-direction: column-reverse;
    }

    .close-project-actions .btn {
        width: 100%;
    }
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 1.5rem;
}
@media (max-width: 768px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
}
.chart-card {
    background-color: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1rem;
}
.chart-card h4 {
    margin: 0 0 1rem 0;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}
.chart-container {
    position: relative;
    height: 320px;
    width: 100%;
}

/* Comparador */
.compare-upload-area {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    border: 2px dashed var(--border-color);
    padding: 2rem 1rem;
    border-radius: 8px;
    text-align: center;
    align-items: center;
    background-color: var(--sidebar-bg);
}
.compare-file-input {
    font-size: 0.85rem;
    color: var(--text-secondary);
}
.compare-results {
    margin-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    padding-top: 1rem;
}
.compare-stats {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}
.stat-card {
    flex: 1;
    background-color: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    padding: 0.75rem;
    border-radius: 8px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}
.stat-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-secondary);
}
.stat-value {
    font-size: 1.1rem;
    font-weight: bold;
    color: var(--text-primary);
}
.clear-compare-btn {
    background-color: #ef4444;
    color: #ffffff;
    border: none;
    padding: 0.4rem 1rem;
    border-radius: 6px;
    font-size: 0.8rem;
    cursor: pointer;
    font-weight: 500;
    width: 100%;
}
.clear-compare-btn:hover {
    background-color: #dc2626;
}

/* Badges de Desviación Comparativa */
.dev-badge {
    display: inline-block;
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    margin-left: 0.5rem;
}
.dev-up {
    background-color: #fee2e2;
    color: #ef4444;
}
.dev-down {
    background-color: #dcfce7;
    color: #16a34a;
}
body.dark-theme .dev-up {
    background-color: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}
body.dark-theme .dev-down {
    background-color: rgba(22, 163, 74, 0.2);
    color: #86efac;
}

/* Celdas Editables de Mediciones */
.m-cell-editable {
    outline: none;
    transition: background-color 0.2s;
    cursor: text;
}
.m-cell-editable:hover {
    background-color: var(--hover-bg);
}
.m-cell-editable:focus {
    background-color: var(--bg-color);
    box-shadow: inset 0 0 0 2px var(--accent);
    border-radius: 4px;
}

/* Animaciones */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes modalBackdropIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes modalContentIn {
    from { opacity: 0; transform: translateY(6px) scale(0.985); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}
@keyframes expandFade {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes loadingBar {
    0% { transform: translateX(-100%); }
    50% { transform: translateX(140%); }
    100% { transform: translateX(300%); }
}
@keyframes slideDown {
    from { transform: translateY(-10px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}
@keyframes ipodSlideInForward {
    from { transform: translateX(22%); opacity: 0.72; }
    to { transform: translateX(0); opacity: 1; }
}
@keyframes ipodSlideInBack {
    from { transform: translateX(-18%); opacity: 0.72; }
    to { transform: translateX(0); opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}

/* Dropdown de Exportación */
.dropdown {
    position: relative;
    display: inline-block;
}
.export-btn {
    background-color: #475569; /* Slate 600 */
    color: #ffffff;
    border: none;
    padding: 0.5rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}
.export-btn:hover {
    background-color: #334155; /* Slate 700 */
}
.export-btn:active {
    transform: scale(0.97);
}
.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    top: 100%;
    margin-top: 4px;
    background-color: var(--bg-color);
    min-width: 160px;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.15);
    z-index: 1000;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    animation: slideDown 0.2s ease-out;
}
.dropdown-content button {
    background: none;
    border: none;
    color: var(--text-primary);
    padding: 10px 16px;
    display: block;
    width: 100%;
    text-align: left;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: background-color 0.2s;
}
.dropdown-content button:hover {
    background-color: var(--hover-bg);
}
.dropdown.show .dropdown-content {
    display: block;
}

/* ============================================================
   MÓDULO PLANNING — GANTT STYLES
   ============================================================ */

/* Botón Planning */
.planning-btn {
    background: linear-gradient(135deg, #1e3a5f, #2d5986);
    color: #fff;
    border: none;
    padding: 7px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.82rem;
    font-weight: 600;
    transition: background 0.2s, transform 0.1s;
    margin-left: 4px;
}
.planning-btn:hover {
    background: linear-gradient(135deg, #2d5986, #1e3a5f);
    transform: translateY(-1px);
}

/* Modal Overlay */
.planning-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.52);
    backdrop-filter: blur(2px);
    z-index: 3000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    animation: modalBackdropIn 0.16s ease-out;
}
.planning-modal-content {
    background: var(--bg-color);
    width: min(100%, 1760px);
    height: min(100%, 980px);
    max-width: calc(100vw - 2rem);
    max-height: calc(100vh - 2rem);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalContentIn 0.18s ease-out;
}

/* Cabecera del modal */
.planning-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    background: var(--table-header-bg);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    gap: 12px;
    flex-wrap: wrap;
}
.planning-modal-title {
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    display: inline-flex;
    align-items: center;
}
.planning-controls {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.planning-controls label {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 5px;
    color: var(--text-secondary);
}
.gantt-control-input {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    padding: 3px 6px;
    font-size: 0.8rem;
}
.gantt-control-input:focus {
    outline: none;
    border-color: var(--accent);
}
.gantt-action-btn {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 4px 10px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 600;
    transition: background 0.2s;
}
.gantt-action-btn:hover { background: var(--hover-bg); }
.gantt-excel-btn { border-color: var(--success); color: var(--success); }
.gantt-excel-btn:hover { background: rgba(34,197,94,0.12); }
.gantt-pdf-btn { border-color: var(--accent); color: var(--accent); }
.gantt-pdf-btn:hover { background: rgba(14,165,233,0.12); }
.gantt-close-btn {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 4px 10px;
    cursor: pointer;
    font-size: 0.78rem;
    font-weight: 700;
    transition: background 0.2s;
}
.gantt-close-btn:hover { background: var(--hover-bg); }

/* Contenedor principal del Gantt */
.gantt-container {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.gantt-table-wrap {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Columna izquierda (tareas) */
.gantt-left-col {
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    border-right: 2px solid var(--border-color);
    overflow-y: auto;
    overflow-x: hidden;
    position: relative; /* necesario para el handle absoluto */
}

/* Handle de resize de la columna de tareas */
.gantt-col-resize-handle {
    position: absolute;
    top: 0;
    right: -4px;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    z-index: 20;
    background: transparent;
    transition: background 0.2s;
    touch-action: none; /* sin esto, el navegador cancela el arrastre táctil para hacer scroll */
}
.gantt-col-resize-handle:hover,
.gantt-col-resize-handle:active {
    background: rgba(14, 165, 233, 0.5);
    border-radius: 2px;
}
.gantt-left-header {
    height: 56px;
    background: var(--table-header-bg);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 12px;
    font-weight: 700;
    font-size: 0.82rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 2;
}

/* Filas de nombre de tarea */
.gantt-name-row {
    height: 34px;
    display: flex;
    align-items: center;
    padding: 0 8px;
    border-bottom: 1px solid var(--table-border);
    gap: 4px;
    flex-shrink: 0;
    cursor: default;
    transition: background 0.15s;
}
.gantt-name-row:hover { background: var(--hover-bg); }
.gantt-depth-1 {
    background: #f0f4f8;
    font-weight: 700;
    font-size: 0.82rem;
    color: #1e3a5f;
    padding-left: 8px;
}
.gantt-depth-2 {
    font-size: 0.78rem;
    padding-left: 24px;
    color: var(--text-primary);
}
.gantt-depth-3 {
    font-size: 0.74rem;
    padding-left: 40px;
    color: var(--text-secondary);
}
body.dark-theme .gantt-depth-1 { background: #0d0d0d; color: #ffffff; }

.gantt-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.65rem;
    color: var(--text-secondary);
    user-select: none;
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    transition: transform 0.15s;
}
.gantt-weeks-input {
    width: 60px;
}
.gantt-toggle.expanded { transform: rotate(90deg); }
.gantt-toggle:hover { color: var(--accent); }
.gantt-toggle-spacer { width: 14px; flex-shrink: 0; }
.gantt-task-name {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

/* Columna derecha (timeline) */
.gantt-right-col {
    flex: 1;
    overflow-x: auto;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
}
.gantt-header-wrap {
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 2;
    background: var(--table-header-bg);
}
.gantt-header-months {
    display: flex;
    height: 28px;
    border-bottom: 1px solid var(--border-color);
}
.gantt-month-cell {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--text-primary);
    background: #dbeafe;
    border-right: 1px solid var(--border-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    letter-spacing: 0.3px;
}
.gantt-month-cell-alt {
    background: #e0f2fe;
}
.gantt-header-weeks {
    display: flex;
    height: 28px;
    border-bottom: 2px solid var(--border-color);
}
.gantt-week-cell {
    width: 44px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.65rem;
    color: var(--text-secondary);
    border-right: 1px solid var(--table-border);
    font-weight: 500;
}
.gantt-week-today {
    color: var(--accent);
    background: rgba(14, 165, 233, 0.12);
    font-weight: 700;
}

/* Cuerpo del Gantt */
.gantt-body {
    flex: 1;
    overflow: visible;
}

/* Filas de barras */
.gantt-bar-row {
    height: 34px;
    position: relative;
    border-bottom: 1px solid var(--table-border);
    flex-shrink: 0;
}
.gantt-bar-row:hover { background: rgba(14, 165, 233, 0.04); }
.gantt-bg-cell {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 44px;
    border-right: 1px solid var(--table-border);
}
.gantt-bg-week-alt {
    background: rgba(100, 116, 139, 0.035);
}
/* Marcar cada 4 semanas (aprox. 1 mes) */
.gantt-bg-month-end {
    border-right: 1px solid #94a3b8 !important;
}
.gantt-today-line {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--accent);
    z-index: 8;
    pointer-events: none;
    box-shadow: 0 0 0 1px rgba(14, 165, 233, 0.16);
}

/* Barras del Gantt */
.gantt-bar {
    position: absolute;
    top: 5px;
    height: 22px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    cursor: grab;
    z-index: 10;
    transition: box-shadow 0.15s;
    user-select: none;
    overflow: visible;
    touch-action: none; /* permite arrastrar la barra con el dedo sin que el gesto se convierta en scroll */
}
.gantt-bar:active { cursor: grabbing; box-shadow: 0 4px 12px rgba(0,0,0,0.25); }
.gantt-bar:hover { box-shadow: 0 2px 8px rgba(0,0,0,0.2); }

/* Colores por profundidad */
.gantt-bar-depth-1 {
    background: linear-gradient(90deg, #800020, #a0002a);
    border: 1px solid #600018;
}
.gantt-bar-depth-2 {
    background: linear-gradient(90deg, #1e5f9f, #2d7abf);
    border: 1px solid #164a7e;
}
.gantt-bar-depth-3 {
    background: linear-gradient(90deg, #0f9f6e, #14b87f);
    border: 1px solid #0a7a54;
}

/* Label dentro de la barra */
.gantt-bar-label {
    flex: 1;
    font-size: 0.62rem;
    color: #fff;
    font-weight: 600;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    padding: 0 4px;
    pointer-events: none;
    letter-spacing: 0.2px;
}

/* Zonas de resize */
.gantt-resize {
    width: 8px;
    height: 100%;
    flex-shrink: 0;
    cursor: ew-resize;
    z-index: 11;
    opacity: 0;
    background: rgba(255,255,255,0.4);
    border-radius: 3px;
    transition: opacity 0.2s;
    touch-action: none;
}
.gantt-bar:hover .gantt-resize { opacity: 1; }
.gantt-resize-l { border-radius: 4px 0 0 4px; }
.gantt-resize-r { border-radius: 0 4px 4px 0; }

/* Dark mode adaptations */
body.dark-theme .gantt-left-col { border-right-color: #262626; }
body.dark-theme .gantt-depth-1 { background: #0d0d0d; }
body.dark-theme .gantt-name-row:hover { background: #111111; }
body.dark-theme .gantt-bg-cell { border-right-color: #242424; }
body.dark-theme .gantt-bg-week-alt { background: rgba(255, 255, 255, 0.035); }
body.dark-theme .gantt-bar-row { border-bottom-color: #242424; }
body.dark-theme .gantt-week-cell { border-right-color: #242424; color: #b8b8b8; }
body.dark-theme .gantt-week-today { color: var(--accent); background: rgba(56, 189, 248, 0.14); }
body.dark-theme .gantt-month-cell { background: #0d0d0d; color: #ffffff; }
body.dark-theme .gantt-month-cell-alt { background: #151515; }

/* Header action normalization: keep legacy button classes functional without color drift. */
.header-action-group .btn.dashboard-btn,
.header-action-group .btn.planning-btn,
.header-action-group .btn.compare-btn,
.header-action-group .btn.export-btn,
.header-action-group .btn.close-project-btn {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.5rem 0.9rem;
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    margin-left: 0;
}

.header-action-group .btn.dashboard-btn:hover,
.header-action-group .btn.planning-btn:hover,
.header-action-group .btn.compare-btn:hover,
.header-action-group .btn.export-btn:hover,
.header-action-group .btn.close-project-btn:hover {
    background: var(--hover-bg);
    border-color: var(--text-secondary);
    color: var(--text-primary);
}

.header-action-group .btn.save-btn {
    background: var(--success);
    border: 1px solid var(--success);
    color: #ffffff;
    padding: 0.5rem 0.9rem;
}

.header-action-group .btn.save-btn:hover {
    background: #16a34a;
    border-color: #16a34a;
}

.header-action-group .btn.theme-toggle-btn {
    width: 2.25rem;
    padding: 0.5rem;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

.header-action-group .btn.theme-toggle-btn:hover {
    background: var(--hover-bg);
    border-color: var(--text-secondary);
}

.tree-node-row.active {
    background-color: var(--table-row-active-bg) !important;
    color: var(--text-primary);
    box-shadow: inset 3px 0 0 var(--accent);
}

.is-hidden {
    display: none;
}

/* ==========================================================================
   Autoguardado y recuperación de sesión: lista de archivos recientes
   ========================================================================== */

.recent-files {
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-color);
    text-align: left;
}

.recent-files-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin: 0 0 var(--space-3) 0;
}

.recent-files-title .ui-icon svg {
    width: 16px;
    height: 16px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.recent-files-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.recent-file-item {
    display: flex;
    align-items: stretch;
    gap: var(--space-2);
}

.recent-file-open {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--space-2) var(--space-3);
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.recent-file-open:hover {
    background: var(--hover-bg);
    border-color: var(--accent);
}

.recent-file-name {
    font-weight: 600;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.recent-file-date {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.recent-file-delete {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
}

.recent-file-delete:hover {
    color: #ef4444;
    border-color: #ef4444;
    background: rgba(239, 68, 68, 0.08);
}

.recent-file-delete .ui-icon svg {
    width: 15px;
    height: 15px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* ==========================================================================
   Edición estructural: acciones de fila, menú contextual y tablas editables
   ========================================================================== */

.tree-node-row {
    position: relative;
}

.row-actions-btn {
    position: absolute;
    right: 4px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    padding: 0;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
    z-index: 2;
}

.tree-node-row:hover .row-actions-btn,
.tree-node-row:focus-within .row-actions-btn,
.row-actions-btn:focus-visible {
    opacity: 1;
}

.row-actions-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.row-actions-btn .ui-icon svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.structure-menu {
    position: fixed;
    z-index: 1200;
    min-width: 220px;
    padding: var(--space-1);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
}

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

.structure-menu-item:hover {
    background: var(--hover-bg);
}

.structure-menu-item.danger {
    color: #ef4444;
}

.structure-menu-item.danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

.structure-menu-item .ui-icon svg {
    width: 15px;
    height: 15px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

/* Acciones en tablas de mediciones */
.m-col-action,
.m-cell-action {
    width: 34px;
    text-align: center;
}

.measurement-delete-btn,
.decomp-delete-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    padding: 0;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    opacity: 0.55;
    transition: opacity var(--transition-fast), color var(--transition-fast), background-color var(--transition-fast);
}

.measurement-delete-btn:hover,
.decomp-delete-btn:hover {
    opacity: 1;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.measurement-delete-btn .ui-icon svg,
.decomp-delete-btn .ui-icon svg {
    width: 13px;
    height: 13px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.add-measurement-row td {
    padding: var(--space-1) var(--space-2);
    border-bottom: none;
}

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

.add-measurement-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.add-measurement-btn .ui-icon svg {
    width: 13px;
    height: 13px;
    stroke: currentColor;
    fill: none;
    stroke-width: 2;
}

.decomp-col-action {
    width: 34px;
}

.decomp-factor {
    display: inline-block;
    min-width: 2.5rem;
}

/* ==========================================================================
   Pestañas de vista (Presupuesto / Certificaciones)
   ========================================================================== */

.view-tabs {
    display: flex;
    gap: var(--space-2);
    padding: 0 2rem;
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.view-tab {
    appearance: none;
    border: none;
    background: transparent;
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-2) var(--space-3);
    font: inherit;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    cursor: pointer;
    transition: color var(--transition-fast), border-color var(--transition-fast);
}

.view-tab:hover,
.view-tab:focus-visible {
    color: var(--text-primary);
}

.view-tab.is-active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.view-tab .ui-icon {
    width: 16px;
    height: 16px;
}

/* ==========================================================================
   Certificaciones y seguimiento de obra
   ========================================================================== */

.cert-view {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-3) 2rem;
    background-color: var(--bg-color);
    overflow: hidden;
}

.cert-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.cert-month-label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.cert-month-input {
    padding: var(--space-1) var(--space-2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-color);
    color: var(--text-primary);
    font: inherit;
    font-size: var(--font-size-sm);
    min-height: 36px;
}

.cert-export-actions {
    display: flex;
    gap: var(--space-2);
}

.cert-month-tabs {
    display: flex;
    align-items: flex-end;
    gap: var(--space-1);
    min-width: 0;
    overflow-x: auto;
    overflow-y: hidden;
    border-bottom: 1px solid var(--border-color);
    scrollbar-width: thin;
    -webkit-overflow-scrolling: touch;
}

.cert-month-tab {
    appearance: none;
    flex: 0 0 auto;
    display: inline-flex;
    align-items: baseline;
    gap: var(--space-1);
    min-height: 38px;
    margin-bottom: -1px;
    padding: var(--space-1) var(--space-3);
    border: 1px solid var(--border-color);
    border-bottom-color: var(--border-color);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    background: var(--sidebar-bg);
    color: var(--text-secondary);
    font: inherit;
    cursor: pointer;
    white-space: nowrap;
    transition: color var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast);
}

.cert-month-tab:hover,
.cert-month-tab:focus-visible {
    color: var(--text-primary);
    border-color: var(--accent);
}

.cert-month-tab:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.cert-month-tab.is-active {
    color: var(--accent);
    background: var(--bg-color);
    border-color: var(--accent);
    border-bottom-color: var(--bg-color);
}

.cert-month-tab-number {
    font-size: var(--font-size-xs);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.cert-month-tab-label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.cert-month-panel {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.cert-summary {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.cert-stat {
    flex: 1;
    min-width: 180px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: var(--space-2) var(--space-3);
    background: var(--sidebar-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.cert-stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.cert-stat-value {
    font-size: var(--font-size-md);
    font-weight: 700;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.cert-table-wrap {
    overflow: auto;
    border: 1px solid var(--table-border);
    border-radius: var(--radius-md);
    flex: 1;
    min-height: 0;
}

.cert-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--font-size-sm);
    min-width: 960px;
}

.cert-table th {
    position: sticky;
    top: 0;
    z-index: 1;
    background: var(--table-header-bg);
    color: var(--text-secondary);
    font-weight: 600;
    text-align: left;
    padding: var(--space-2) var(--space-3);
    border-bottom: 1px solid var(--table-border);
    white-space: nowrap;
}

.cert-table th.numeric,
.cert-table td.numeric {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.cert-table td {
    padding: var(--space-1) var(--space-3);
    border-bottom: 1px solid var(--table-border);
    color: var(--text-primary);
    white-space: nowrap;
}

.cert-table tbody tr:nth-child(even) {
    background: var(--table-row-alt-bg);
}

.cert-table tbody tr:hover {
    background: var(--table-row-hover-bg);
}

.cert-cell-summary {
    max-width: 340px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.cert-col-input {
    background: rgba(14, 165, 233, 0.06);
}

.cert-input {
    width: 92px;
    padding: var(--space-1) var(--space-2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-color);
    color: var(--text-primary);
    font: inherit;
    font-size: var(--font-size-sm);
    text-align: right;
    min-height: 32px;
}

.cert-input:focus {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.cert-row-done td {
    color: var(--success);
}

.cert-row-over td {
    color: #d97706;
}

/* Filas de capítulo del árbol de certificación */
.cert-chapter-row td {
    font-weight: 600;
    background: var(--table-header-bg);
    border-bottom: 1px solid var(--table-border);
}

.cert-table tbody tr.cert-chapter-row:nth-child(even),
.cert-table tbody tr.cert-chapter-row:hover {
    background: var(--table-header-bg);
}

.cert-code-cell {
    white-space: nowrap;
}

.cert-tree-toggle {
    appearance: none;
    border: none;
    background: transparent;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-right: 4px;
    padding: 0;
    color: var(--text-secondary);
    cursor: pointer;
    vertical-align: middle;
    border-radius: var(--radius-sm);
}

.cert-tree-toggle:hover {
    color: var(--text-primary);
    background: var(--table-row-hover-bg);
}

.cert-tree-toggle .ui-icon {
    width: 14px;
    height: 14px;
    transition: transform var(--transition-fast);
}

.cert-tree-toggle.is-collapsed .ui-icon {
    transform: rotate(-90deg);
}

.cert-empty {
    padding: var(--space-5);
    text-align: center;
    color: var(--text-secondary);
}

@media (max-width: 768px) {
    .view-tabs {
        padding: 0 var(--space-3);
    }

    .cert-view {
        padding: var(--space-2) var(--space-3);
        gap: var(--space-2);
    }

    /* En la pestaña de certificaciones la información del presupuesto
       (PEM/PEC, coeficientes, stats) no aporta: liberar altura de cabecera */
    body.view-cert .project-info {
        display: none !important;
    }

    /* Cabecera compacta: controles en una sola fila con salto y
       resumen en tarjetas pequeñas con scroll horizontal */
    .cert-controls {
        gap: var(--space-2);
    }

    .cert-month-label {
        font-size: var(--font-size-xs);
    }

    .cert-month-input {
        min-height: 32px;
        padding: 2px var(--space-1);
    }

    .cert-month-tab {
        min-height: 34px;
        padding: 3px var(--space-2);
    }

    .cert-month-tab-number {
        font-size: 0.65rem;
    }

    .cert-month-tab-label {
        font-size: var(--font-size-xs);
    }

    .cert-month-panel {
        gap: var(--space-2);
    }

    .cert-export-actions {
        gap: var(--space-1);
        flex-wrap: wrap;
    }

    .cert-export-actions .btn {
        padding: var(--space-1) var(--space-2);
        font-size: var(--font-size-xs);
        min-height: 32px;
    }

    .cert-summary {
        flex-wrap: nowrap;
        overflow-x: auto;
        gap: var(--space-2);
        -webkit-overflow-scrolling: touch;
    }

    .cert-stat {
        flex: 0 0 auto;
        min-width: 128px;
        padding: var(--space-1) var(--space-2);
    }

    .cert-stat-value {
        font-size: var(--font-size-sm);
    }

    .cert-table {
        min-width: 760px;
    }

    .cert-input {
        min-height: 44px;
    }

    /* En táctil el botón de acciones estructurales queda oculto (hover);
       la edición estructural completa se realiza en escritorio */
    .row-actions-btn {
        display: none;
    }
}