/* RMG Editor - Modern CSS Styles */

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

:root {
    /* Color Palette */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --success-color: #059669;
    --success-hover: #047857;
    --warning-color: #d97706;
    --warning-hover: #b45309;
    --error-color: #dc2626;
    --error-hover: #b91c1c;

    /* Neutral Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-overlay: rgba(0, 0, 0, 0.5);

    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.375rem;
    --radius-lg: 0.5rem;
    --radius-xl: 0.75rem;

    /* 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);

    /* Transitions */
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.3s ease-in-out;
    --transition-slow: 0.5s ease-in-out;

    /* Z-index layers */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow: hidden;
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow);
}

.loading-content {
    text-align: center;
    color: white;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-content h2 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
}

.loading-content p {
    opacity: 0.8;
}

/* Error Screen */
.error-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.error-content {
    text-align: center;
    max-width: 400px;
    padding: var(--spacing-2xl);
}

.error-icon {
    font-size: 4rem;
    color: var(--error-color);
    margin-bottom: var(--spacing-lg);
}

.error-content h2 {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.error-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover:not(:disabled) {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

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

.btn-success:hover:not(:disabled) {
    background-color: var(--success-hover);
    border-color: var(--success-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-warning:hover:not(:disabled) {
    background-color: var(--warning-hover);
    border-color: var(--warning-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 12px;
}

.btn-icon {
    padding: var(--spacing-sm);
    width: auto;
    min-width: 36px;
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    padding: var(--spacing-xs);
}

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

/* Application Container */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background-color: var(--bg-primary);
}

/* Header */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    z-index: var(--z-sticky);
}

.header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.app-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

.app-title i {
    margin-right: var(--spacing-sm);
}

.app-subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.header-center {
    flex: 1;
    text-align: center;
}

.file-info {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.file-name {
    font-weight: 500;
    color: var(--text-primary);
}

.unsaved-indicator {
    color: var(--warning-color);
    font-size: 0.75rem;
}

.unsaved-indicator i {
    font-size: 0.5rem;
}

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

.header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Toolbar */
.app-toolbar {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.toolbar-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

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

.sidebar-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.sidebar-section {
    margin-bottom: var(--spacing-xl);
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-md);
}

.section-header h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.item-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.item-list:empty::before {
    content: "No items";
    color: var(--text-muted);
    font-style: italic;
    padding: var(--spacing-md);
    text-align: center;
}

/* Canvas Container */
.canvas-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
    position: relative;
}

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

.rmg-canvas {
    width: 100%;
    height: 100%;
    background-color: white;
    cursor: crosshair;
}

.canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.canvas-placeholder {
    text-align: center;
    max-width: 400px;
    padding: var(--spacing-2xl);
}

.canvas-icon {
    font-size: 4rem;
    color: var(--text-muted);
    margin-bottom: var(--spacing-lg);
}

.canvas-placeholder h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.canvas-placeholder p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
}

.canvas-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.status-left,
.status-center,
.status-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* Property Panel */
.property-panel {
    width: 320px;
    background-color: var(--bg-primary);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

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

.panel-header h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.properties-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Validation Panel */
.validation-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 300px;
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    box-shadow: var(--shadow-lg);
    z-index: var(--z-fixed);
    display: flex;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

.validation-panel:not(.hidden) {
    transform: translateY(0);
}

.validation-results {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
}

/* Status Bar */
.app-status-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* Form Elements */
.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input,
.form-select,
.form-textarea {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 14px;
    background-color: var(--bg-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

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

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

/* List Items */
.list-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.list-item:hover {
    border-color: var(--border-hover);
    background-color: var(--bg-secondary);
}

.list-item.selected {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.list-item-icon {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.list-item-content {
    flex: 1;
    min-width: 0;
}

.list-item-title {
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.list-item-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.list-item-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* Validation Messages */
.validation-message {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
}

.validation-message.error {
    background-color: rgba(220, 38, 38, 0.1);
    border: 1px solid rgba(220, 38, 38, 0.2);
    color: var(--error-color);
}

.validation-message.warning {
    background-color: rgba(217, 119, 6, 0.1);
    border: 1px solid rgba(217, 119, 6, 0.2);
    color: var(--warning-color);
}

.validation-message.success {
    background-color: rgba(5, 150, 105, 0.1);
    border: 1px solid rgba(5, 150, 105, 0.2);
    color: var(--success-color);
}

.validation-message-icon {
    margin-top: 2px;
    flex-shrink: 0;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Responsive Design */
@media (max-width: 1200px) {
    .sidebar,
    .property-panel {
        width: 250px;
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        gap: var(--spacing-md);
        padding: var(--spacing-sm);
    }

    .header-left,
    .header-center,
    .header-right {
        width: 100%;
    }

    .header-center {
        order: 3;
    }

    .sidebar,
    .property-panel {
        display: none;
    }

    .main-content {
        flex-direction: column;
    }

    .canvas-container {
        height: 60vh;
    }
}

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

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

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

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

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

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

/* Focus Styles */
.btn:focus-visible,
.form-input:focus-visible,
.form-select:focus-visible,
.form-textarea:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    color: white;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    z-index: 10000;
    max-width: 400px;
    display: none;
    animation: slideInRight 0.3s ease-out;
}

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

.notification-success {
    background-color: var(--success-color);
}

.notification-error {
    background-color: var(--error-color);
}

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

.notification-info {
    background-color: var(--primary-color);
}

/* Loading States */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.loading-spinner-small {
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* Error States */
.error-boundary {
    padding: var(--spacing-xl);
    text-align: center;
    border: 1px solid var(--error-color);
    border-radius: var(--radius-md);
    background-color: rgba(220, 38, 38, 0.05);
}

.error-boundary h3 {
    color: var(--error-color);
    margin-bottom: var(--spacing-md);
}

.error-boundary-actions {
    margin-top: var(--spacing-lg);
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

/* Disabled States */
.panel-disabled {
    opacity: 0.5;
    pointer-events: none;
}

.panel-disabled::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.8);
    z-index: 10;
}

/* Performance Optimizations */
.virtual-list {
    overflow-y: auto;
    max-height: 400px;
}

.virtual-item {
    will-change: transform;
    contain: layout style paint;
}

/* Debounced Input */
.input-debounced {
    transition: background-color var(--transition-fast);
}

.input-debounced.updating {
    background-color: rgba(37, 99, 235, 0.05);
}

/* Print Styles */
@media print {
    .app-toolbar,
    .sidebar,
    .property-panel,
    .validation-panel,
    .app-status-bar,
    .notification {
        display: none !important;
    }

    .app-header {
        position: static;
        box-shadow: none;
        border-bottom: 1px solid #000;
    }

    .canvas-container {
        height: auto;
        min-height: 600px;
    }
}