/* ==========================================================================
   WBS Tool - Main Stylesheet
   ========================================================================== */

/* Variables */
:root {
    /* Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #06b6d4;

    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-hover: #e2e8f0;

    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    /* Borders */
    --border-color: #e2e8f0;
    --border-dark: #cbd5e1;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);

    /* Spacing */
    --header-height: 60px;
    --toolbar-height: 50px;
    --view-tabs-height: 45px;
    --status-bar-height: 30px;

    /* Fonts */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    --font-mono: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New', monospace;
}

/* Dark Mode */
body.dark-mode {
    --primary-color: #60a5fa;
    --primary-hover: #3b82f6;
    --secondary-color: #94a3b8;
    --success-color: #34d399;
    --warning-color: #fbbf24;
    --danger-color: #f87171;
    --info-color: #22d3ee;

    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-hover: #475569;

    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;

    --border-color: #334155;
    --border-dark: #475569;

    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* Dark mode canvas background */
body.dark-mode .gantt-chart-panel {
    background-color: var(--bg-primary);
}

body.dark-mode .gantt-canvas {
    background-color: var(--bg-primary);
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-family);
    font-size: 14px;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    line-height: 1.5;
}

/* ==========================================================================
   Header
   ========================================================================== */

.app-header {
    height: var(--header-height);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    box-shadow: var(--shadow-sm);
}

.header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}

.app-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    white-space: nowrap;
}

.project-selector {
    display: flex;
    align-items: center;
    gap: 8px;
}

.project-dropdown {
    min-width: 200px;
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    font-size: 14px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.project-dropdown:hover {
    border-color: var(--border-dark);
}

.project-dropdown:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ==========================================================================
   View Tabs
   ========================================================================== */

.view-tabs {
    height: var(--view-tabs-height);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    padding: 0 20px;
    gap: 4px;
}

.view-tab {
    padding: 12px 20px;
    border: none;
    background: none;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.view-tab:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

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

/* ==========================================================================
   Toolbar
   ========================================================================== */

.toolbar {
    height: var(--toolbar-height);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    gap: 12px;
}

.toolbar-left,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
}

/* Buttons */
.btn {
    padding: 6px 16px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

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

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

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

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

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border-color: var(--danger-color);
}

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

.btn-small, .btn-sm {
    padding: 4px 12px;
    font-size: 13px;
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 16px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

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

.btn-danger:hover {
    background-color: var(--danger-color);
    color: white;
}

.btn-group {
    display: flex;
    gap: 0;
}

.btn-group .btn {
    border-radius: 0;
}

.btn-group .btn:first-child {
    border-top-left-radius: 6px;
    border-bottom-left-radius: 6px;
}

.btn-group .btn:last-child {
    border-top-right-radius: 6px;
    border-bottom-right-radius: 6px;
}

.btn-group .btn + .btn {
    border-left: none;
}

.btn-dropdown {
    padding: 6px 8px;
    min-width: auto;
}

/* Search and Filters */
.search-input {
    width: 200px;
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background-color: var(--bg-primary);
    font-size: 14px;
    cursor: pointer;
    transition: border-color 0.2s;
}

.filter-select:hover {
    border-color: var(--border-dark);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* ==========================================================================
   Main Content
   ========================================================================== */

.main-content {
    height: calc(100vh - var(--header-height) - var(--view-tabs-height) - var(--toolbar-height) - var(--status-bar-height));
    width: 100%;
    max-width: 100vw;
    overflow: hidden;
}

.view-container {
    display: none;
    height: 100%;
    overflow: auto;
}

.view-container.active {
    display: block;
}

/* ==========================================================================
   Status Bar
   ========================================================================== */

.status-bar {
    height: var(--status-bar-height);
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    font-size: 12px;
    color: var(--text-secondary);
}

.status-left,
.status-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

/* ==========================================================================
   Modal
   ========================================================================== */

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 18px;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border: none;
    background: none;
    font-size: 24px;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s;
}

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

.modal-body {
    padding: 20px;
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
}

/* Form */
.form-row {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.form-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group.full {
    flex: 1 1 100%;
}

.form-group label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    font-family: var(--font-family);
    transition: all 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 60px;
}

.form-group select[multiple] {
    min-height: 80px;
    padding: 4px;
}

.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 6px;
    cursor: pointer;
}

.form-group label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-weight: 400;
    padding-top: 8px;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */

.hidden {
    display: none !important;
}

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

.text-success {
    color: var(--success-color);
}

.text-warning {
    color: var(--warning-color);
}

.text-danger {
    color: var(--danger-color);
}

.warning {
    color: var(--warning-color);
}

/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 768px) {
    .app-title {
        font-size: 16px;
    }

    .project-dropdown {
        min-width: 150px;
    }

    .toolbar {
        flex-wrap: wrap;
        height: auto;
        min-height: var(--toolbar-height);
        padding: 8px 12px;
    }

    .toolbar-left,
    .toolbar-right {
        flex-wrap: wrap;
    }

    .search-input {
        width: 150px;
    }

    .modal-content {
        width: 95%;
        max-height: 95vh;
    }

    .form-row {
        flex-direction: column;
    }
}

/* Dependencies list with checkboxes */
.dependencies-list {
    max-height: 150px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px;
    background-color: var(--bg-primary);
}

.dependency-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.15s;
}

.dependency-item:hover {
    background-color: var(--bg-hover);
}

.dependency-item input[type="checkbox"] {
    cursor: pointer;
}

.dependency-item label {
    cursor: pointer;
    flex: 1;
    font-size: 13px;
    margin: 0;
    user-select: none;
}

/* ==========================================================================
   Report Styles
   ========================================================================== */

.report-panel {
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.report-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

.report-header h2 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
}

.report-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.report-content {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow-md);
}

.report-section {
    margin-bottom: 40px;
}

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

.report-section h2 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.report-section h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 12px 0;
}

.report-section h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 16px 0 8px 0;
}

.report-section.warning {
    background: #fff3cd;
    padding: 20px;
    border-radius: 8px;
    border-left: 4px solid var(--warning-color);
}

.report-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.summary-card {
    background: var(--bg-tertiary);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.summary-card h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-secondary);
    margin: 0 0 12px 0;
}

.summary-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.summary-card ul li {
    padding: 6px 0;
    color: var(--text-primary);
    font-size: 14px;
}

.report-table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    background: var(--bg-primary);
}

.report-table th {
    background: var(--bg-tertiary);
    padding: 12px;
    text-align: left;
    font-weight: 600;
    font-size: 13px;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
}

.report-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    font-size: 14px;
}

.report-table tr:last-child td {
    border-bottom: none;
}

.report-charts {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin: 20px 0;
}

.report-chart {
    background: var(--bg-primary);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    min-height: 300px;
}

.report-chart canvas {
    max-height: 400px;
}

.chart-container {
    background: var(--bg-primary);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin: 20px 0;
}

.chart-container canvas {
    max-height: 400px;
    width: 100% !important;
    height: auto !important;
}

.report-table tr:hover {
    background: var(--bg-tertiary);
}

.status-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge.status-todo {
    background: #e9ecef;
    color: #495057;
}

.status-badge.status-in_progress {
    background: #cfe2ff;
    color: #084298;
}

.status-badge.status-review {
    background: #fff3cd;
    color: #997404;
}

.status-badge.status-done {
    background: #d1e7dd;
    color: #0f5132;
}

.no-data {
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
    padding: 20px;
}

/* Report Customization Panel */
.report-customize-panel {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}

.report-customize-panel h3 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 16px 0;
    color: var(--text-primary);
}

.customize-options {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.customize-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}

.customize-option:hover {
    background: var(--bg-hover);
    border-color: var(--primary-color);
}

.schedule-config {
    margin-bottom: 16px;
}

.schedule-option {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 12px;
}

.schedule-option:hover {
    background: var(--bg-hover);
    border-color: var(--primary-color);
}

.schedule-option input[type="checkbox"] {
    cursor: pointer;
}

.schedule-info {
    background: var(--bg-tertiary);
    padding: 12px;
    border-radius: 6px;
    margin-top: 16px;
}

.schedule-info p {
    margin: 4px 0;
    font-size: 13px;
    color: var(--text-secondary);
}

.customize-option input[type="checkbox"] {
    cursor: pointer;
}

.customize-option span {
    font-size: 14px;
    color: var(--text-primary);
    user-select: none;
}

.customize-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
}

/* ==========================================================================
   Gantt Chart - Split View
   ========================================================================== */

.split-view {
    display: flex;
    height: 100%;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

/* WBS List Panel (Left Side) */
.wbs-list-panel {
    flex: 0 1 auto;
    width: 852px;
    min-width: 500px;
    max-width: calc(100% - 250px);
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    overflow: hidden;
}

/* Panel Resize Handle */
.panel-resize-handle {
    width: 8px;
    cursor: col-resize;
    background-color: var(--border-color);
    position: relative;
    flex-shrink: 0;
    transition: background-color 0.2s;
}

.panel-resize-handle:hover {
    background-color: var(--primary-color);
}

.panel-resize-handle.resizing {
    background-color: var(--primary-color);
}

.wbs-header {
    background-color: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.wbs-header-row {
    display: flex;
    align-items: center;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    min-width: fit-content;
}

.wbs-header-row-1 {
    height: 30px;
    padding: 4px 12px;
    display: flex;
    justify-content: flex-end;
    align-items: center;
}

.wbs-header-row-2 {
    height: 40px;
    border-top: 1px solid var(--border-color);
}

/* Reset column width button */
.btn-reset-columns {
    padding: 4px 12px;
    font-size: 12px;
    background-color: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

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

.wbs-col {
    padding: 8px 12px;
    border-right: 1px solid var(--border-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    position: relative;
    flex-shrink: 0;
}

/* Remove border from header columns */
.wbs-header .wbs-col {
    border-right: none;
}

.wbs-col-name {
    width: 315px;
    min-width: 150px;
    flex-shrink: 0;
}

.wbs-col-type {
    width: 64px;
    flex-shrink: 0;
}

.wbs-col-points {
    width: 65px;
    flex-shrink: 0;
    text-align: center;
}

.wbs-col-assignee {
    width: 139px;
    flex-shrink: 0;
}

.wbs-col-start,
.wbs-col-end {
    width: 100px;
    flex-shrink: 0;
}

.wbs-col-progress {
    flex: 1;
    min-width: 60px;
    text-align: center;
}

/* Column resize handle */
.resize-handle {
    position: absolute;
    right: 10px;
    top: 0;
    bottom: 0;
    width: 10px;
    cursor: col-resize;
    user-select: none;
    z-index: 10;
    background-color: rgba(148, 163, 184, 0.3);
    border-left: 2px solid transparent;
    border-right: 2px solid transparent;
    transition: all 0.2s;
}

.resize-handle:hover {
    background-color: rgba(100, 116, 139, 0.5);
    border-left: 2px solid rgba(100, 116, 139, 0.8);
    border-right: 2px solid rgba(100, 116, 139, 0.8);
}

.resize-handle.resizing {
    background-color: rgba(71, 85, 105, 0.6);
    border-left: 3px solid rgba(71, 85, 105, 1);
    border-right: 3px solid rgba(71, 85, 105, 1);
}

/* Prevent text selection during resize */
body.resizing-column {
    cursor: col-resize !important;
    user-select: none !important;
}

.wbs-list {
    flex: 1;
    overflow-y: hidden;
    overflow-x: auto;
}

.wbs-row {
    display: flex;
    align-items: center;
    height: 40px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.15s;
    min-width: fit-content;
}

.wbs-row:hover {
    background-color: var(--bg-hover);
}

.wbs-row.selected {
    background-color: rgba(37, 99, 235, 0.15);
    border-left: 3px solid var(--primary-color);
}

.wbs-row.parent-task {
    background-color: var(--bg-tertiary);
    font-weight: 600;
}

.wbs-row.parent-task.selected {
    background-color: rgba(37, 99, 235, 0.18);
}

.wbs-row .wbs-col {
    font-size: 13px;
    color: var(--text-primary);
}

.wbs-row .wbs-col-name {
    display: flex;
    align-items: center;
    gap: 4px;
    overflow: hidden;
    flex-shrink: 0;
}

.task-name {
    flex: 1 1 auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0 !important;
    max-width: 100%;
}

.task-indent {
    display: inline-block;
    flex-shrink: 0;
}

.task-toggle {
    flex-shrink: 0;
}

.task-type-icon {
    font-size: 14px;
    flex-shrink: 0;
}

/* Gantt Chart Panel (Right Side) */
.gantt-chart-panel {
    flex: 1 1 auto;
    min-width: 250px;
    max-width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--bg-primary);
}

.gantt-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 12px;
}

.gantt-controls-left,
.gantt-controls-right {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.gantt-control-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.gantt-control-item input[type="checkbox"] {
    cursor: pointer;
}

.progress-mode-select {
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 12px;
    background-color: var(--bg-primary);
    cursor: pointer;
}

.gantt-header {
    height: 40px;
    background-color: var(--bg-tertiary);
    border-bottom: 1px solid var(--border-color);
    overflow-x: hidden;
    position: relative;
}

.gantt-timeline {
    display: flex;
    height: 100%;
}

.gantt-timeline-cell {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    color: var(--text-secondary);
    border-right: 1px solid var(--border-color);
    flex-shrink: 0;
}

.gantt-timeline-cell.today {
    color: var(--primary-color);
    font-weight: 600;
    background-color: rgba(37, 99, 235, 0.1);
}

.gantt-timeline-cell.saturday {
    background-color: rgba(59, 130, 246, 0.05);
}

.gantt-timeline-cell.sunday-holiday {
    background-color: rgba(239, 68, 68, 0.05);
    color: var(--danger-color);
}

.gantt-canvas-container {
    flex: 1;
    overflow: auto;
    position: relative;
    background-color: var(--bg-primary);
}

#gantt-canvas {
    display: block;
}

.gantt-svg {
    position: absolute;
    top: 0;
    left: 0;
    pointer-events: none;
}

/* ==========================================================================
   Responsive Design for Gantt Chart
   ========================================================================== */

@media (max-width: 1200px) {
    .wbs-list-panel {
        width: 852px;
        min-width: 500px;
        max-width: calc(100% - 250px);
    }

    .wbs-col-name {
        width: 315px;
    }

    .wbs-col-type {
        width: 64px;
    }

    .wbs-col-points {
        width: 65px;
    }

    .wbs-col-assignee {
        width: 139px;
    }

    .wbs-col-start,
    .wbs-col-end {
        width: 100px;
    }
}

@media (max-width: 992px) {
    .split-view {
        flex-direction: column;
    }

    .wbs-list-panel {
        width: 100%;
        max-width: 100%;
        height: 300px;
        border-right: none;
        border-bottom: 2px solid var(--border-color);
    }

    .gantt-chart-panel {
        height: calc(100% - 300px);
    }
}

@media (max-width: 768px) {
    .wbs-list-panel {
        height: 280px;
    }

    .wbs-col-type {
        width: 60px;
    }

    .wbs-col-points {
        display: none;
    }

    .wbs-col-assignee {
        width: 100px;
    }

    .wbs-col-start,
    .wbs-col-end {
        width: 90px;
    }

    .wbs-col-progress {
        width: 70px;
    }

    .gantt-controls {
        padding: 6px 12px;
    }

    .gantt-controls-left,
    .gantt-controls-right {
        gap: 8px;
    }

    .gantt-control-item {
        font-size: 12px;
    }
}

@media (max-width: 576px) {
    .wbs-list-panel {
        height: 250px;
    }

    .wbs-col-type {
        display: none;
    }

    .wbs-col-assignee {
        display: none;
    }

    .wbs-col-start,
    .wbs-col-end {
        width: 80px;
        font-size: 11px;
    }

    .wbs-col-progress {
        width: 60px;
    }

    .gantt-header {
        height: 35px;
    }

    .gantt-timeline-cell {
        font-size: 10px;
        min-width: 30px;
    }
}

/* ==========================================================================
   Warning Banner
   ========================================================================== */

.warning-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10000;
    padding: 12px 20px;
    box-shadow: var(--shadow-md);
    animation: slideDown 0.3s ease-out;
}

.warning-banner-warning {
    background-color: #fffbeb;
    border-bottom: 2px solid var(--warning-color);
    color: #92400e;
}

.warning-banner-error {
    background-color: #fef2f2;
    border-bottom: 2px solid var(--danger-color);
    color: #991b1b;
}

.warning-banner-info {
    background-color: #eff6ff;
    border-bottom: 2px solid var(--info-color);
    color: #1e40af;
}

.warning-banner-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    max-width: 1200px;
    margin: 0 auto;
}

.warning-banner-icon {
    font-size: 18px;
    flex-shrink: 0;
}

.warning-banner-message {
    flex: 1;
    font-size: 14px;
    font-weight: 500;
}

.warning-banner-close {
    background: none;
    border: none;
    font-size: 18px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    color: inherit;
    opacity: 0.7;
    transition: opacity 0.2s;
    flex-shrink: 0;
}

.warning-banner-close:hover {
    opacity: 1;
    background-color: rgba(0, 0, 0, 0.05);
}

@keyframes slideDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ==========================================================================
   Settings Modal
   ========================================================================== */

.settings-tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border-color);
}

.settings-tab {
    padding: 12px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all 0.2s;
}

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

.settings-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.settings-tab-content {
    display: none;
}

.settings-tab-content.active {
    display: block;
    animation: fadeIn 0.3s;
}

.settings-tab-content h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.setting-item {
    margin-bottom: 20px;
    padding: 16px;
    background-color: var(--bg-secondary);
    border-radius: 6px;
}

.setting-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 4px;
    cursor: pointer;
}

.setting-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.setting-description {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 4px;
    margin-left: 26px;
}

.setting-select {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    cursor: pointer;
    margin-top: 8px;
}

.setting-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Custom Scrollbar Styles
   ========================================================================== */

/* Gantt Chart Canvas Container - Large, visible scrollbars */
.gantt-canvas-container::-webkit-scrollbar {
    width: 14px;
    height: 14px;
}

.gantt-canvas-container::-webkit-scrollbar-track {
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.gantt-canvas-container::-webkit-scrollbar-thumb {
    background-color: var(--secondary-color);
    border-radius: 8px;
    border: 2px solid var(--bg-secondary);
    transition: background-color 0.2s;
}

.gantt-canvas-container::-webkit-scrollbar-thumb:hover {
    background-color: var(--primary-color);
}

.gantt-canvas-container::-webkit-scrollbar-corner {
    background-color: var(--bg-secondary);
}

/* WBS List - Hide vertical scrollbar, keep horizontal */
.wbs-list::-webkit-scrollbar {
    width: 0px;
    height: 10px;
}

.wbs-list::-webkit-scrollbar-track {
    background-color: var(--bg-secondary);
}

.wbs-list::-webkit-scrollbar-thumb {
    background-color: var(--border-dark);
    border-radius: 4px;
}

.wbs-list::-webkit-scrollbar-thumb:hover {
    background-color: var(--secondary-color);
}

/* Firefox scrollbar support */
.gantt-canvas-container {
    scrollbar-width: auto;
    scrollbar-color: var(--secondary-color) var(--bg-secondary);
}

.wbs-list {
    scrollbar-width: none;
}

/* ==========================================================================
   Dashboard Styles
   ========================================================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px;
}

.dashboard-card {
    background: var(--bg-primary);
    border-radius: 8px;
    padding: 20px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.dashboard-card.wide {
    grid-column: span 2;
}

.kpi-card {
    text-align: center;
}

.kpi-card h3 {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.kpi-value {
    font-size: 36px;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.kpi-value.warning {
    color: var(--danger-color);
}

.kpi-label {
    font-size: 12px;
    color: var(--text-muted);
}

.chart-card {
    min-height: 400px;
    display: flex;
    flex-direction: column;
}

.chart-card.wide {
    min-height: 450px;
}

.chart-card canvas {
    min-height: 320px !important;
    flex: 1;
    max-width: 100%;
    height: auto;
}

.chart-card-header {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 16px;
    gap: 8px;
}

.chart-card-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
}

.period-select {
    padding: 6px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 14px;
    cursor: pointer;
    width: 100%;
    max-width: 250px;
}

.period-select:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn-expand-chart {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 16px;
    padding: 4px 8px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.btn-expand-chart:hover {
    background-color: var(--bg-hover);
}

/* ============================================
   Welcome Modal & Help Modal Styles
   ============================================ */

/* Welcome Modal */
.welcome-content {
    padding: 24px;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 28px;
    align-items: start;
}

.welcome-left {
    position: sticky;
    top: 0;
}

.welcome-right {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.welcome-section {
    margin-bottom: 28px;
}

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

.welcome-section:first-child {
    margin-bottom: 0;
    padding: 20px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-radius: 10px;
    color: white;
}

.welcome-section:first-child h3 {
    color: white;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.welcome-section:first-child p {
    color: rgba(255, 255, 255, 0.95);
    font-size: 13px;
    line-height: 1.5;
}

.welcome-section h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.welcome-section p {
    color: var(--text-secondary);
    line-height: 1.5;
    font-size: 13px;
}

.welcome-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin: 0 0 28px 0;
}

.welcome-feature {
    padding: 14px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-primary);
    transition: all 0.2s ease;
}

.welcome-feature:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border-color: var(--primary-color);
}

.feature-icon {
    font-size: 36px;
    margin-bottom: 8px;
    display: block;
}

.welcome-feature h4 {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.welcome-feature p {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
    margin: 0;
}

.welcome-steps {
    list-style: none;
    padding: 0;
    margin: 0;
    counter-reset: step-counter;
}

.welcome-steps li {
    margin-bottom: 12px;
    padding-left: 38px;
    position: relative;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

.welcome-steps li::before {
    content: counter(step-counter);
    counter-increment: step-counter;
    position: absolute;
    left: 0;
    top: 0;
    width: 26px;
    height: 26px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 13px;
}

.welcome-steps li strong {
    color: var(--text-primary);
    font-weight: 600;
}

.welcome-tips {
    list-style: none;
    padding: 0;
    margin: 0;
}

.welcome-tips li {
    margin-bottom: 10px;
    padding-left: 26px;
    position: relative;
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.5;
}

.welcome-tips li::before {
    content: "💡";
    position: absolute;
    left: 0;
    font-size: 16px;
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

/* Modal Large Size */
.modal-content.modal-large {
    max-width: 1380px;
    max-height: 90vh;
    width: 95%;
}

.modal-content.modal-large .modal-body {
    max-height: calc(90vh - 80px);
    overflow-y: auto;
}

/* Scrollbar styling for modal */
.modal-large .modal-body::-webkit-scrollbar {
    width: 8px;
}

.modal-large .modal-body::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

.modal-large .modal-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.modal-large .modal-body::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ==========================================================================
   Help Modal Styles
   ========================================================================== */

/* Help Modal Body - Override default padding */
#help-modal .modal-body {
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Help Tabs */
.help-tabs {
    display: flex;
    gap: 4px;
    margin: 0;
    padding: 16px 20px 0 20px;
    border-bottom: 2px solid var(--border-color);
    background-color: var(--bg-primary);
    flex-shrink: 0;
}

.help-tab {
    padding: 12px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: -2px;
    border-radius: 6px 6px 0 0;
    white-space: nowrap;
}

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

.help-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    background-color: var(--bg-primary);
}

/* Help Tab Content */
.help-tab-content {
    display: none;
    padding: 24px;
    overflow-y: auto;
    flex: 1;
}

.help-tab-content.active {
    display: block;
}

.help-tab-content > *:first-child {
    margin-top: 0 !important;
}

/* Help Intro */
.help-intro {
    margin: 0 0 32px 0;
}

.help-intro h3 {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px 0;
    line-height: 1.4;
}

.help-intro p {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* Help Step (for Quickstart) */
.help-step {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    padding: 16px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
}

.help-step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 18px;
}

.help-step-content h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 8px 0;
}

.help-step-content p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

/* Help Section (for Guide) */
.help-section {
    margin-bottom: 24px;
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
    border-left: 4px solid var(--primary-color);
}

.help-section h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 12px 0;
}

.help-section h5 {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    margin: 20px 0 8px 0;
}

.help-section h5:first-of-type {
    margin-top: 8px;
}

.help-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 12px;
}

.help-section ul {
    padding-left: 24px;
    color: var(--text-secondary);
    line-height: 1.7;
    list-style-type: disc;
    margin: 0;
}

.help-section ul li {
    margin-bottom: 8px;
}

.help-section ul li strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* Help Note */
.help-note {
    padding: 16px;
    background-color: rgba(245, 158, 11, 0.1);
    border-left: 4px solid var(--warning-color);
    border-radius: 8px;
    margin-bottom: 24px;
}

.help-note p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ==========================================================================
   Storage Modal Styles
   ========================================================================== */

.storage-summary {
    margin-bottom: 32px;
}

.storage-usage-bar {
    width: 100%;
    height: 32px;
    background-color: var(--bg-secondary);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.storage-usage-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
    min-width: 2%;
}

.storage-stats {
    display: flex;
    justify-content: space-around;
    gap: 16px;
}

.storage-stat {
    flex: 1;
    text-align: center;
    padding: 12px;
    background-color: var(--bg-secondary);
    border-radius: 8px;
}

.storage-label {
    display: block;
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.storage-value {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.storage-breakdown {
    margin-bottom: 24px;
}

.storage-breakdown h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 16px 0;
}

.storage-items {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.storage-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background-color: var(--bg-secondary);
    border-radius: 6px;
}

.storage-item-name {
    font-size: 14px;
    color: var(--text-primary);
}

.storage-item-size {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

.storage-note {
    margin-top: 24px;
    padding: 16px;
    background-color: rgba(37, 99, 235, 0.1);
    border-left: 4px solid var(--primary-color);
    border-radius: 8px;
}

.storage-note p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}