/* CSS Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Theme Colors */
    --bg-primary: #1a1d28;
    --bg-secondary: #252836;
    --bg-tertiary: #2d3243;
    --bg-card: #2d3243;
    --border-color: #3a4055;
    --text-primary: #e2e8f0;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --accent-success: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    --accent-info: #0ea5e9;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.2);
    --radius: 8px;
    --radius-sm: 4px;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --transition: all 0.2s ease;
}

.light-mode {
    --bg-primary: #f8fafc;
    --bg-secondary: #f1f5f9;
    --bg-tertiary: #e2e8f0;
    --bg-card: #ffffff;
    --border-color: #cbd5e1;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.05);
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
    transition: var(--transition);
}

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

/* Toolbar Styles */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 16px;
    height: 60px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: 100;
}

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

.toolbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--accent-primary);
}

.logo i {
    font-size: 1.5rem;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 8px;
    border-right: 1px solid var(--border-color);
}

.toolbar-group:last-child {
    border-right: none;
}

.toolbar-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.toolbar-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.project-name {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.zoom-level {
    min-width: 50px;
    text-align: center;
    font-weight: 600;
    font-size: 0.875rem;
}

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

/* Sidebar Styles */
.sidebar {
    width: 280px;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition);
}

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

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 4px;
    border-radius: 4px;
}

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

.sidebar-section {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-section h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    margin-bottom: 16px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Toolbox */
.toolbox {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.toolbox-btn {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

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

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

/* Objects List */
.objects-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 300px;
    overflow-y: auto;
}

.object-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.object-item:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

.object-item.selected {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.object-icon {
    width: 24px;
    text-align: center;
}

.object-name {
    flex: 1;
    font-size: 0.875rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Schema Summary */
.schema-summary {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.schema-summary p {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.schema-summary span {
    font-weight: 600;
    color: var(--text-primary);
}

/* Canvas Area */
.canvas-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background-color: var(--bg-primary);
}

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

.canvas-controls {
    display: flex;
    gap: 8px;
}

.canvas-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

.canvas-status {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.hint {
    font-style: italic;
    opacity: 0.7;
}

.canvas-wrapper {
    flex: 1;
    position: relative;
    overflow: hidden;
    cursor: grab;
}

.canvas-wrapper.panning {
    cursor: grabbing;
}

.grid-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--border-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.3;
}

.connections-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.diagram-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: 0 0;
    transition: transform 0.1s ease;
}

/* Table Node */
.table-node {
    position: absolute;
    width: 240px;
    background-color: var(--bg-card);
    border-radius: var(--radius);
    border: 2px solid var(--border-color);
    box-shadow: var(--shadow);
    cursor: move;
    transition: var(--transition);
    user-select: none;
}

.table-node:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.1);
}

.table-node.selected {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.3);
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background-color: var(--accent-primary);
    color: white;
    border-radius: var(--radius) var(--radius) 0 0;
    font-weight: 600;
}

.table-name {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.table-actions {
    display: flex;
    gap: 4px;
}

.table-action-btn {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 0.8rem;
    padding: 2px;
    border-radius: 2px;
}

.table-action-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.table-body {
    padding: 0;
    max-height: 300px;
    overflow-y: auto;
}

.table-column {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8rem;
    gap: 8px;
}

.table-column:hover {
    background-color: var(--bg-tertiary);
}

.column-name {
    flex: 1;
    font-family: var(--font-mono);
    overflow: hidden;
    text-overflow: ellipsis;
}

.column-type {
    color: var(--accent-secondary);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background-color: var(--bg-secondary);
    padding: 2px 6px;
    border-radius: 3px;
}

.column-icons {
    display: flex;
    gap: 4px;
    color: var(--text-tertiary);
}

.column-pk {
    color: var(--accent-warning);
}

.column-unique {
    color: var(--accent-success);
}

.column-nullable {
    color: var(--accent-info);
}

.table-footer {
    padding: 8px 12px;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    border-top: 1px solid var(--border-color);
}

/* Selection Rectangle */
.selection-rect {
    position: absolute;
    border: 2px dashed var(--accent-primary);
    background-color: rgba(59, 130, 246, 0.1);
    pointer-events: none;
    display: none;
}

/* Canvas Footer */
.canvas-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Inspector Panel */
.inspector-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.inspector-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-tertiary);
    text-align: center;
    gap: 16px;
}

.inspector-placeholder i {
    font-size: 3rem;
    opacity: 0.5;
}

.inspector-panel {
    animation: fadeIn 0.2s ease;
}

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

.inspector-panel h4 {
    margin-bottom: 16px;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea.form-control {
    min-height: 80px;
    resize: vertical;
}

.form-check-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 16px;
}

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 0.875rem;
}

.form-check input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.inspector-section {
    margin: 24px 0;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.inspector-section h5 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.columns-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 12px;
    max-height: 200px;
    overflow-y: auto;
}

.column-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: var(--transition);
}

.column-item:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.column-item.selected {
    background-color: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.pk-selector {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.pk-option {
    padding: 6px 10px;
    background-color: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.pk-option.selected {
    background-color: var(--accent-warning);
    color: white;
    border-color: var(--accent-warning);
}

.inspector-actions {
    display: flex;
    gap: 8px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.inspector-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
    padding: 10px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

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

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

/* Warnings Panel */
.warnings-panel {
    padding: 16px;
    background-color: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
}

.warnings-panel h5 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
    color: var(--accent-warning);
    font-size: 0.9rem;
}

.warnings-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 120px;
    overflow-y: auto;
}

.warning-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    padding: 8px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.warning-item i {
    color: var(--accent-warning);
    margin-top: 2px;
}

/* Modal Styles */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s;
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    background-color: var(--bg-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
}

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

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 24px;
}

.export-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.export-option {
    padding: 20px;
    background-color: var(--bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

.export-option h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
    font-size: 1rem;
}

.export-option p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.export-btns {
    display: flex;
    gap: 8px;
}

.export-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.875rem;
    cursor: pointer;
    transition: var(--transition);
}

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

.export-preview {
    margin-top: 24px;
}

.code-preview {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 16px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    max-height: 300px;
    overflow-y: auto;
    white-space: pre-wrap;
    word-break: break-all;
}

.help-sections {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.help-section h4 {
    margin-bottom: 16px;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.shortcuts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

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

kbd {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px 8px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    min-width: 80px;
    text-align: center;
}

.help-section ol,
.help-section ul {
    padding-left: 20px;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.help-footer {
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.help-footer code {
    background-color: var(--bg-primary);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
}

/* Context Menu */
.context-menu {
    position: fixed;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    z-index: 1001;
    min-width: 200px;
    display: none;
}

.context-menu.active {
    display: block;
    animation: fadeIn 0.1s ease;
}

.context-menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition);
}

.context-menu-item:hover {
    background-color: var(--accent-primary);
    color: white;
}

.context-divider {
    height: 1px;
    background-color: var(--border-color);
    margin: 4px 0;
}

/* Toast Notifications */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1002;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 300px;
}

.toast {
    padding: 12px 16px;
    background-color: var(--bg-card);
    border-left: 4px solid var(--accent-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast.success {
    border-left-color: var(--accent-success);
}

.toast.warning {
    border-left-color: var(--accent-warning);
}

.toast.error {
    border-left-color: var(--accent-danger);
}

.toast i {
    font-size: 1.2rem;
}

.toast-message {
    flex: 1;
    font-size: 0.875rem;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    min-width: 200px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 100;
    display: none;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-item {
    padding: 12px 16px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: var(--transition);
}

.dropdown-item:hover {
    background-color: var(--accent-primary);
    color: white;
}

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

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

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

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-primary);
}

/* Responsive Adjustments */
@media (max-width: 1200px) {
    .sidebar {
        width: 240px;
    }
    
    .export-options {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .toolbar-center {
        display: none;
    }
    
    .sidebar {
        width: 200px;
    }
    
    .modal-content {
        width: 95%;
    }
}