/* ManasMap - Modern Professional UI (Light Mode) */

:root {
    /* Modern Color Palette - Light Mode */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;
    --success: #10b981;
    --success-dark: #059669;
    --warning: #f59e0b;
    --warning-dark: #d97706;
    --danger: #ef4444;
    --danger-dark: #dc2626;
    --info: #06b6d4;
    --info-dark: #0891b2;
    
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --surface: #ffffff;
    --surface-elevated: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-success: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --gradient-warning: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    --gradient-danger: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    --gradient-info: linear-gradient(135deg, #06b6d4 0%, #0891b2 100%);
    --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
    
    /* 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), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(99, 102, 241, 0.3);
    
    /* Transitions */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Typography */
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-feature-settings: "cv02", "cv03", "cv04", "cv11";
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

/* Toolbar Styles */
.toolbar {
    height: 70px;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.toolbar .btn {
    font-weight: 500;
    letter-spacing: 0.025em;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
    transition: var(--transition-base);
    border: none;
}

.toolbar .btn:hover {
    box-shadow: var(--shadow-md);
}

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

.toolbar .btn-outline-light {
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    background: transparent;
}

.toolbar .btn-outline-light:hover {
    background: var(--bg-tertiary);
    border-color: var(--primary);
    color: var(--primary);
}

.toolbar .btn-outline-light.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-glow);
}

.toolbar .input-group {
    max-width: 350px;
}

.toolbar .form-control {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    padding: 0.625rem 1rem;
    transition: var(--transition-base);
}

.toolbar .form-control:focus {
    background: var(--surface);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
}

.toolbar .form-control::placeholder {
    color: var(--text-muted);
}

.toolbar .input-group-text {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
}

/* Sidebar Layout */
.mindmap-layout {
    display: flex;
    height: calc(100vh - 56px);
    overflow: hidden;
}

.sidebar {
    width: 280px;
    min-width: 280px;
    background: var(--surface);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
    overflow: hidden;
    z-index: 100;
}

.sidebar.collapsed {
    width: 0;
    min-width: 0;
    border-right: none;
}

.sidebar.collapsed .sidebar-content {
    opacity: 0;
    visibility: hidden;
}

.sidebar-content {
    padding: 1rem;
    overflow-y: auto;
    flex: 1;
    transition: opacity 0.2s ease;
}

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

.sidebar-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.sidebar-close {
    color: var(--text-muted);
    padding: 0.25rem;
}

.sidebar-close:hover {
    color: var(--text-primary);
}

.sidebar-section {
    margin-bottom: 1.25rem;
}

.sidebar-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.filter-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.filter-btn {
    text-align: left;
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
    border-radius: 0.5rem;
    transition: all 0.2s ease;
}

.filter-btn.active {
    background: var(--primary) !important;
    border-color: var(--primary) !important;
    color: white !important;
}

.action-buttons {
    display: flex;
    flex-direction: column;
}

.quick-filter-buttons {
    display: flex;
    gap: 0.5rem;
}

.quick-filter-buttons .btn {
    flex: 1;
    padding: 0.5rem;
}

/* Main Content Area */
.main-content {
    flex: 1;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.sidebar-toggle {
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 50;
    width: 40px;
    height: 40px;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    background: var(--surface);
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.sidebar-toggle:hover {
    background: var(--bg-tertiary);
    box-shadow: var(--shadow-lg);
}

/* Sidebar Trigger Zone - Invisible hover area on left edge */
.sidebar-trigger {
    position: fixed;
    left: 0;
    top: 0;
    width: 20px;
    height: 100vh;
    z-index: 999;
    background: transparent;
}

/* When sidebar is open via hover, trigger zone expands to cover sidebar */
.sidebar:not(.collapsed) ~ .main-content .sidebar-toggle {
    opacity: 0.5;
}

/* Mindmap Container */
.mindmap-container {
    height: 100%;
    overflow: hidden;
    position: relative;
    background: var(--gradient-bg);
    background-attachment: fixed;
}

#mindmapSvg {
    width: 100%;
    height: 100%;
    cursor: grab;
    /* Prevent browser from claiming pointer events (scroll/zoom) before D3 zoom */
    touch-action: none;
    user-select: none;
}

#mindmapSvg.is-panning,
#mindmapSvg.is-panning * {
    cursor: grabbing !important;
}

/* GPU compositing hint for the transform group.
   Do NOT add a CSS `transform` here — D3 zoom sets the transform via SVG
   attribute, and CSS `transform` has higher cascade priority than SVG
   presentation attributes, which would visually override D3's pan/zoom. */
#mindmapSvg > g {
    will-change: transform;
}

/* Task Node Styles - Modern Card Design */
.task-node {
    cursor: pointer;
    will-change: transform, opacity;
}

.task-node:hover {
    opacity: 0.95;
}

.task-node.highlighted .task-rect {
    filter: drop-shadow(0 0 8px rgba(251, 191, 36, 0.8)) brightness(1.1);
    stroke: var(--warning);
    stroke-width: 2.5px;
}

.task-node.dragging {
    opacity: 0.8;
    cursor: grabbing !important;
}

.task-node.dragging .task-rect {
    filter: drop-shadow(0 0 12px rgba(99, 102, 241, 0.6));
}

.task-node.drop-target .task-rect {
    stroke: var(--success) !important;
    stroke-width: 3px !important;
    filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.7)) !important;
    animation: pulse-drop 0.6s ease-in-out infinite;
}

@keyframes pulse-drop {
    0%, 100% { filter: drop-shadow(0 0 10px rgba(16, 185, 129, 0.7)); }
    50% { filter: drop-shadow(0 0 18px rgba(16, 185, 129, 0.9)); }
}

.task-node.greyed-out {
    opacity: 0.25;
    filter: grayscale(100%) blur(1px);
}

.task-node.selected .task-rect {
    stroke: #fbbf24;
    stroke-width: 4;
    filter: drop-shadow(0 0 12px rgba(251, 191, 36, 0.7));
}

.task-rect {
    rx: 12;
    ry: 12;
    stroke-width: 2;
    stroke: rgba(0, 0, 0, 0.3);
}

.task-node:hover .task-rect {
    stroke-width: 3;
    stroke: rgba(0, 0, 0, 0.5);
}

/* Priority-based Gradients */
.task-rect.priority-low {
    fill: url(#gradient-low);
}

.task-rect.priority-medium {
    fill: url(#gradient-medium);
}

.task-rect.priority-high {
    fill: url(#gradient-high);
}

.task-rect.priority-critical {
    fill: url(#gradient-critical);
}

/* Root node style - unique purple color */
.task-rect.root-node {
    fill: url(#gradient-root);
    stroke: #7c3aed;
    stroke-width: 3px;
}

/* Status-based Styles */
.task-rect.status-completed {
    fill: url(#gradient-completed);
    stroke: var(--success);
}

.task-rect.status-in-progress {
    fill: url(#gradient-in-progress);
    stroke: var(--primary);
    animation: pulse-glow 2s ease-in-out infinite;
}

.task-rect.status-paused {
    fill: url(#gradient-paused);
    stroke: var(--warning);
}

.task-rect.overdue {
    stroke: var(--danger);
    stroke-width: 2.5px;
    stroke-dasharray: 8,4;
    animation: dash-rotate 20s linear infinite;
}

@keyframes pulse-glow {
    0%, 100% { 
        filter: drop-shadow(0 0 5px rgba(99, 102, 241, 0.4));
    }
    50% { 
        filter: drop-shadow(0 0 15px rgba(99, 102, 241, 0.6));
    }
}

@keyframes dash-rotate {
    to {
        stroke-dashoffset: -100;
    }
}

/* Typography for Task Nodes */
.task-text {
    fill: white;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    font-weight: 500;
    text-anchor: middle;
    dominant-baseline: middle;
    pointer-events: none;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.task-title {
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.025em;
}

.task-subtitle {
    font-size: 11px;
    opacity: 0.9;
    font-weight: 400;
}

/* Task Controls - Modern Icons */
.task-controls {
    opacity: 0;
}

.task-node:hover .task-controls {
    opacity: 1;
}

.control-btn {
    cursor: pointer;
}

.control-btn:hover {
    opacity: 0.85;
}

.control-btn:active {
    opacity: 0.7;
}

.control-btn.add-btn {
    fill: var(--success);
}

.control-btn.edit-btn {
    fill: var(--info);
}

.control-btn.delete-btn {
    fill: var(--danger);
}

.control-btn.time-start {
    fill: var(--success);
}

.control-btn.time-stop {
    fill: var(--danger);
}

.control-btn.time-pause {
    fill: var(--warning);
}

/* Collapse / expand toggle pill */
.collapse-toggle {
    cursor: pointer;
}

.collapse-toggle:hover .collapse-btn {
    opacity: 0.85;
    transform: scaleX(1.08);
}

.collapse-btn {
    transition: fill 0.2s, transform 0.15s;
}

.collapse-btn.expanded {
    fill: #64748b;
}

.collapse-btn.collapsed {
    fill: #6366f1;
}

/* Connection Lines - Subtle & Elegant */
.connection-line {
    stroke: rgba(71, 85, 105, 0.3);
    stroke-width: 2.5;
    fill: none;
    transition: var(--transition-base);
}

.connection-line:hover {
    stroke: rgba(71, 85, 105, 0.6);
    stroke-width: 3;
}

/* Floating Action Buttons - Material Design 3 */
.floating-buttons {
    position: fixed;
    bottom: 32px;
    right: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 1000;
}

.floating-btn {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    border: none;
    box-shadow: var(--shadow-lg);
    transition: var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.floating-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0) 100%);
    opacity: 0;
    transition: var(--transition-base);
}

.floating-btn:hover::before {
    opacity: 1;
}

.floating-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.floating-btn:active {
    transform: translateY(-2px);
}

.floating-btn.btn-success {
    background: var(--gradient-success);
}

.floating-btn.btn-warning {
    background: var(--gradient-warning);
}

.floating-btn.btn-info {
    background: var(--gradient-info);
}

.floating-btn.btn-secondary {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%);
}

.floating-btn i {
    font-size: 22px;
    z-index: 1;
    color: white;
}

/* Modal Enhancements - Modern Cards */
.modal-content {
    border-radius: 16px;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-xl);
    background: var(--surface);
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    background: var(--bg-secondary);
}

.modal-title {
    font-weight: 600;
    font-size: 1.25rem;
    letter-spacing: 0.025em;
    color: var(--text-primary);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    background: var(--bg-secondary);
}

.modal .form-label {
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    letter-spacing: 0.025em;
}

.modal .form-control,
.modal .form-select {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: 0.5rem;
    padding: 0.625rem 0.875rem;
    transition: var(--transition-base);
}

.modal .form-control:focus,
.modal .form-select:focus {
    background: var(--surface);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
    color: var(--text-primary);
}

.modal .btn {
    padding: 0.625rem 1.25rem;
    font-weight: 500;
    border-radius: 0.5rem;
    transition: var(--transition-base);
    border: none;
}

.modal .btn-primary {
    background: var(--gradient-primary);
    box-shadow: var(--shadow-md);
    color: white;
}

.modal .btn-primary:hover {
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.modal .btn-danger {
    background: var(--gradient-danger);
    box-shadow: var(--shadow-md);
    color: white;
}

.modal .btn-danger:hover {
    box-shadow: var(--shadow-lg);
}

.modal .btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.modal .btn-secondary:hover {
    background: var(--bg-secondary);
}

/* Alert Styling */
.alert-info {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 0.75rem;
    color: var(--text-primary);
}

/* Table Styling */
.table {
    color: var(--text-secondary);
}

.table thead {
    background: var(--bg-tertiary);
    border-bottom: 2px solid var(--border-color);
}

.table thead th {
    color: var(--text-primary);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 0.75rem;
    border: none;
}

.table-striped tbody tr:nth-of-type(odd) {
    background: var(--bg-secondary);
}

.table tbody td {
    padding: 0.75rem;
    border-color: var(--border-light);
    vertical-align: middle;
}

/* Badge Styling */
.badge {
    padding: 0.375rem 0.75rem;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.025em;
    border-radius: 0.375rem;
}

.badge.bg-success {
    background: var(--gradient-success) !important;
    color: white !important;
}

.badge.bg-warning {
    background: var(--gradient-warning) !important;
    color: white !important;
}

.badge.bg-secondary {
    background: linear-gradient(135deg, #64748b 0%, #475569 100%) !important;
    color: white !important;
}

/* Time Tracking Indicators */
.time-indicator {
    position: absolute;
    top: -5px;
    right: -5px;
    width: 14px;
    height: 14px;
    background: var(--gradient-success);
    border-radius: 50%;
    border: 2px solid var(--surface);
    animation: pulse-indicator 2s infinite;
}

.time-indicator.paused {
    background: var(--gradient-warning);
    animation: pulse-slow 3s infinite;
}

@keyframes pulse-indicator {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.2);
        opacity: 0.8;
    }
}

@keyframes pulse-slow {
    0%, 100% {
        transform: scale(1);
        opacity: 0.9;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.7;
    }
}

/* Breathing dot animation for in-progress tasks */
.breathing-dot {
    fill: var(--success);
    animation: breathing 2s ease-in-out infinite;
}

.breathing-dot.paused {
    fill: var(--warning);
    animation: breathing-slow 3s ease-in-out infinite;
}

@keyframes breathing {
    0%, 100% {
        r: 5;
        opacity: 1;
    }
    50% {
        r: 7;
        opacity: 0.6;
    }
}

@keyframes breathing-slow {
    0%, 100% {
        r: 5;
        opacity: 0.8;
    }
    50% {
        r: 6;
        opacity: 0.5;
    }
}

/* Search Highlighting */
.search-highlight {
    fill: url(#gradient-search);
    animation: search-glow 2s ease-in-out infinite alternate;
}

@keyframes search-glow {
    0% { 
        filter: brightness(1) drop-shadow(0 0 8px var(--warning)); 
    }
    100% { 
        filter: brightness(1.1) drop-shadow(0 0 20px var(--warning)); 
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .toolbar {
        height: auto;
        min-height: 70px;
        padding: 0.75rem !important;
    }
    
    .toolbar .d-flex {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .toolbar .input-group {
        max-width: 100% !important;
    }
    
    .floating-buttons {
        bottom: 24px;
        right: 24px;
        gap: 10px;
    }
    
    .floating-btn {
        width: 52px;
        height: 52px;
        border-radius: 14px;
    }
    
    .floating-btn i {
        font-size: 18px;
    }
    
    .mindmap-container {
        height: calc(100vh - 150px);
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 1.25rem;
    }
}

/* Loading Spinner */
.loading-spinner {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 200px;
}

.spinner-border {
    width: 3rem;
    height: 3rem;
    border-color: var(--primary);
    border-right-color: transparent;
}

/* Chart Container */
.chart-container {
    position: relative;
    height: 350px;
    padding: 1.5rem;
    background: var(--surface);
    border-radius: 0.75rem;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

/* Tooltip Enhancements */
.tooltip {
    font-size: 0.875rem;
}

.tooltip-inner {
    max-width: 300px;
    text-align: left;
    background: var(--text-primary);
    border-radius: 0.5rem;
    padding: 0.5rem 0.75rem;
    box-shadow: var(--shadow-lg);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-muted);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.3;
    color: var(--text-muted);
}

.empty-state h5 {
    color: var(--text-secondary);
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.empty-state p {
    color: var(--text-muted);
    font-size: 0.875rem;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
    transition: var(--transition-base);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Smooth Transitions */
* {
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

/* Focus Visible for Accessibility */
*:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
    border-radius: 0.25rem;
}

/* Navbar styling */
.navbar {
    background: var(--surface) !important;
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 1040;
    position: relative;
    padding: 0.25rem 1rem !important;
    min-height: auto;
}

.navbar-brand {
    color: var(--text-primary) !important;
    font-size: 1rem;
    padding: 0.25rem 0;
}

.nav-link {
    color: var(--text-secondary) !important;
    padding: 0.25rem 0.5rem !important;
    font-size: 0.875rem;
}

.nav-link:hover {
    color: var(--primary) !important;
}

.dropdown-menu {
    background: var(--surface);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    z-index: 1050;
}

.dropdown-item {
    color: var(--text-primary);
}

.dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}