/* Global Styles */
:root {
    --primary-color: #2196F3;
    --secondary-color: #607D8B;
    --success-color: #4CAF50;
    --warning-color: #FF9800;
    --danger-color: #F44336;
    --bg-color: #f5f7fa;
    --sidebar-bg: #ffffff;
    --header-bg: #1976D2;
    --text-primary: #212121;
    --text-secondary: #757575;
    --border-color: #e0e0e0;
    --hover-color: #f0f0f0;
    --grid-color: #e8e8e8;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    overflow: hidden;
}

/* App Container */
.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header */
.app-header {
    background: var(--header-bg);
    color: white;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2px;
}

.subtitle {
    font-size: 0.85rem;
    opacity: 0.9;
}

.header-right {
    display: flex;
    gap: 10px;
}

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    font-size: 0.9rem;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
    font-weight: 500;
}

.btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

/* Header buttons - white background, black text */
.app-header .btn {
    background: white;
    color: #212121;
    border: 1px solid rgba(255,255,255,0.3);
}

.app-header .btn:hover {
    background: #f5f5f5;
    border-color: rgba(255,255,255,0.5);
}

/* Regular buttons (non-header) */
.btn-primary:not(.app-header .btn) {
    background: var(--primary-color);
    color: white;
}

.btn-primary:not(.app-header .btn):hover {
    background: #1976D2;
}

.btn-secondary:not(.app-header .btn) {
    background: var(--secondary-color);
    color: white;
}

.btn-secondary:not(.app-header .btn):hover {
    background: #546E7A;
}

.btn-secondary {
    background: var(--secondary-color);
    color: white;
    padding: 10px 20px;
    min-width: fit-content;
}

.btn-secondary:hover {
    background: #546E7A;
}

.btn-success:not(.app-header .btn) {
    background: var(--success-color);
    color: white;
}

.btn-success:not(.app-header .btn):hover {
    background: #388E3C;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85rem;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

/* Sidebars */
.sidebar {
    background: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar-left {
    width: 320px;
}

.sidebar-right {
    width: 300px;
    border-right: none;
    border-left: 1px solid var(--border-color);
}

.sidebar-header {
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-header h2 {
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.sidebar-body {
    flex: 1;
    overflow-y: auto;
    padding: 15px;
}

/* Subject Tabs */
.subject-tabs {
    display: flex;
    gap: 5px;
}

.tab-btn {
    flex: 1;
    padding: 8px;
    border: 1px solid var(--border-color);
    background: white;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}

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

/* Filters */
.filters {
    margin-bottom: 15px;
}

.filter-group {
    margin-bottom: 12px;
}

.filter-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--text-secondary);
}

.filter-group select,
.filter-group input[type="text"] {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

/* Standards List */
.standards-list {
    max-height: calc(100vh - 400px);
    overflow-y: auto;
}

.standard-item {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 8px;
    cursor: move;
    background: white;
    transition: all 0.2s;
}

.standard-item:hover {
    background: var(--hover-color);
    border-color: var(--primary-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.standard-item.dragging {
    opacity: 0.5;
}

.standard-id {
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 4px;
    font-size: 0.9rem;
}

.standard-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.standard-meta {
    margin-top: 6px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
}

.badge-major {
    background: #E8F5E9;
    color: #2E7D32;
}

.badge-supporting {
    background: #E3F2FD;
    color: #1565C0;
}

.badge-additional {
    background: #FFF3E0;
    color: #E65100;
}

.badge-grade {
    background: var(--hover-color);
    color: var(--text-secondary);
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: #fafafa;
    overflow: hidden;
}

.canvas-controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 15px;
    background: white;
    border-bottom: 1px solid var(--border-color);
    gap: 15px;
}

.zoom-controls,
.tool-controls,
.view-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

#zoomLevel {
    min-width: 50px;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
}

.tool-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    background: white;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: all 0.2s;
}

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

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

.view-controls label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.9rem;
    cursor: pointer;
}

/* Canvas */
.canvas-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
}

.mapping-canvas {
    width: 100%;
    height: 100%;
    cursor: default;
}

.mapping-canvas.tool-link {
    cursor: crosshair;
}

.mapping-canvas.tool-delete {
    cursor: not-allowed;
}

.canvas-hint {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.1rem;
    pointer-events: none;
    opacity: 0.5;
}

/* Canvas Nodes */
.canvas-node {
    cursor: move;
}

.canvas-node rect {
    fill: white;
    stroke: #ccc;
    stroke-width: 2;
}

.canvas-node.major-cluster rect {
    fill: #E8F5E9;
    stroke: #4CAF50;
    stroke-width: 3;
}

.canvas-node.supporting-cluster rect {
    fill: #E3F2FD;
    stroke: #2196F3;
}

.canvas-node.additional-cluster rect {
    fill: #FFF3E0;
    stroke: #FF9800;
}

.canvas-node.selected rect {
    stroke: #F44336;
    stroke-width: 3;
    filter: drop-shadow(0 0 8px rgba(244, 67, 54, 0.4));
}

.canvas-node:hover rect {
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.canvas-node text {
    pointer-events: none;
    user-select: none;
}

/* Canvas Links */
.canvas-link {
    fill: none;
    stroke-width: 3;
    cursor: pointer;
    transition: stroke-width 0.2s;
}

.canvas-link.progress-to {
    stroke: #4CAF50;
}

.canvas-link.progress-from {
    stroke: #2196F3;
}

.canvas-link.related {
    stroke: #FF9800;
}

.canvas-link:hover {
    stroke-width: 4;
}

.canvas-link.selected {
    stroke-width: 4;
    stroke-dasharray: 5, 5;
}

/* Grid */
.grid-line {
    stroke: var(--grid-color);
    stroke-width: 1;
}

/* Properties Panel */
.properties-section {
    margin-bottom: 20px;
}

.properties-section h3 {
    font-size: 0.95rem;
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-color);
}

.property-row {
    margin-bottom: 12px;
}

.property-row label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text-secondary);
}

.property-row input,
.property-row select,
.property-row textarea {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.9rem;
    font-family: inherit;
}

.property-row textarea {
    resize: vertical;
    min-height: 60px;
}

.property-value {
    padding: 8px;
    background: var(--hover-color);
    border-radius: 4px;
    font-size: 0.9rem;
}

.relationship-list {
    list-style: none;
}

.relationship-item {
    padding: 8px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.relationship-item button {
    padding: 4px 8px;
    background: var(--danger-color);
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 0.75rem;
}

.no-selection {
    text-align: center;
    color: var(--text-secondary);
    padding: 40px 20px;
}

/* Modals */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

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

.modal-header h2 {
    font-size: 1.3rem;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-modal:hover {
    color: var(--danger-color);
}

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

.modal-footer {
    padding: 15px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.modal-footer .btn {
    padding: 10px 20px;
    font-size: 0.9rem;
    height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 5px;
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 0.95rem;
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
}

/* Template list styles */
.templates-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.template-item {
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
}

.template-item:hover {
    border-color: var(--primary-color);
    background: #f8f9fa;
}

.template-item.selected {
    border-color: var(--primary-color);
    background: #e3f2fd;
}

.template-name {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.template-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Saved maps list styles */
.saved-maps-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.saved-map-item {
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
    background: white;
}

.saved-map-item:hover {
    border-color: var(--primary-color);
    background: #f8f9fa;
}

.saved-map-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.saved-map-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Saved Maps List */
.saved-maps-list {
    max-height: 200px;
    overflow-y: auto;
}

.saved-map-item {
    padding: 12px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.saved-map-item:hover {
    background: var(--hover-color);
    border-color: var(--primary-color);
}

.saved-map-name {
    font-weight: 600;
    margin-bottom: 4px;
}

.saved-map-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* Utilities */
.loading {
    text-align: center;
    padding: 20px;
    color: var(--text-secondary);
}

.muted {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.error {
    color: var(--danger-color);
    padding: 10px;
    background: #FFEBEE;
    border-radius: 4px;
    margin-bottom: 10px;
}

.success {
    color: var(--success-color);
    padding: 10px;
    background: #E8F5E9;
    border-radius: 4px;
    margin-bottom: 10px;
}

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

::-webkit-scrollbar-track {
    background: var(--hover-color);
}

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

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

/* Responsive */
@media (max-width: 1200px) {
    .sidebar-left {
        width: 280px;
    }
    
    .sidebar-right {
        width: 260px;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: 10px;
    }
    
    .header-right {
        width: 100%;
        justify-content: space-between;
    }
    
    .sidebar-left,
    .sidebar-right {
        position: absolute;
        height: 100%;
        z-index: 100;
        box-shadow: 0 0 10px rgba(0,0,0,0.2);
    }
    
    .sidebar-left {
        left: -320px;
        transition: left 0.3s;
    }
    
    .sidebar-left.show {
        left: 0;
    }
    
    .sidebar-right {
        right: -300px;
        transition: right 0.3s;
    }
    
    .sidebar-right.show {
        right: 0;
    }
}