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

:root {
    --bg-dark: #1a1a2e;
    --bg-panel: #16213e;
    --bg-card: #0f3460;
    --accent: #e94560;
    --accent-hover: #ff6b6b;
    --text: #eaeaea;
    --text-muted: #a0a0a0;
    --border: #2a2a4a;
    --success: #4ade80;
    --warning: #fbbf24;
    --shadow: rgba(0, 0, 0, 0.3);

    /* Component colors */
    --column-color: #3b82f6;
    --row-color: #8b5cf6;
    --text-color: #10b981;
    --button-color: #f59e0b;
    --input-color: #06b6d4;
    --card-color: #ec4899;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
}

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

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 20px;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    font-size: 18px;
    font-weight: 600;
    background: linear-gradient(135deg, var(--accent), #ff8a80);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

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

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

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

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

.btn-small {
    padding: 4px 10px;
    font-size: 12px;
}

.btn-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
}

.btn-close:hover {
    color: var(--accent);
}

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

/* Panels */
.panel {
    background: var(--bg-panel);
    border-right: 1px solid var(--border);
    overflow-y: auto;
    padding: 16px;
}

.panel h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

.components-panel {
    width: 220px;
    flex-shrink: 0;
}

.properties-panel {
    width: 280px;
    flex-shrink: 0;
    border-right: none;
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

/* Component Groups */
.component-group {
    margin-bottom: 20px;
}

.component-group h4 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.component-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.component-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-card);
    border-radius: 8px;
    cursor: grab;
    transition: all 0.2s;
    font-size: 13px;
}

.component-item:hover {
    background: var(--border);
    transform: translateX(4px);
}

.component-item:active {
    cursor: grabbing;
}

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

.component-icon {
    font-size: 16px;
}

/* Canvas */
.canvas-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 20px;
    background: var(--bg-dark);
    overflow: auto;
}

.canvas-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.device-label {
    font-size: 14px;
    color: var(--text-muted);
}

#deviceSelect {
    padding: 6px 12px;
    background: var(--bg-panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 13px;
}

.phone-frame {
    background: #2d2d2d;
    border-radius: 40px;
    padding: 12px;
    box-shadow: 0 20px 60px var(--shadow);
    position: relative;
}

.phone-notch {
    width: 120px;
    height: 24px;
    background: #1a1a1a;
    border-radius: 0 0 16px 16px;
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

.canvas {
    width: 360px;
    height: 640px;
    background: white;
    border-radius: 28px;
    overflow: hidden;
    position: relative;
}

.canvas-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #999;
    text-align: center;
}

.canvas-placeholder p {
    margin: 8px 0;
}

/* Canvas Elements */
.canvas-element {
    position: relative;
    min-height: 40px;
    border: 2px dashed transparent;
    transition: all 0.2s;
    cursor: pointer;
}

.canvas-element:hover {
    border-color: var(--accent);
}

.canvas-element.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(233, 69, 96, 0.3);
}

.canvas-element.drag-over {
    border-color: var(--success);
    background: rgba(74, 222, 128, 0.1);
}

.canvas-element .element-label {
    position: absolute;
    top: -20px;
    left: 4px;
    font-size: 10px;
    color: var(--accent);
    background: white;
    padding: 2px 6px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 100;
}

.canvas-element:hover .element-label,
.canvas-element.selected .element-label {
    opacity: 1;
}

.canvas-element .delete-btn {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 20px;
    height: 20px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 12px;
    cursor: pointer;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
}

.canvas-element:hover .delete-btn,
.canvas-element.selected .delete-btn {
    opacity: 1;
}

/* Element Types */
.element-column {
    display: flex;
    flex-direction: column;
    padding: 8px;
    background: rgba(59, 130, 246, 0.1);
    border-left: 3px solid var(--column-color);
}

.element-row {
    display: flex;
    flex-direction: row;
    padding: 8px;
    background: rgba(139, 92, 246, 0.1);
    border-left: 3px solid var(--row-color);
}

.element-text {
    padding: 8px 12px;
    color: #333;
    font-size: 14px;
}

.element-button {
    padding: 10px 20px;
    background: #6200EE;
    color: white;
    border-radius: 4px;
    text-align: center;
    margin: 4px;
}

.element-input {
    padding: 12px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin: 4px;
    color: #999;
}

.element-card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 16px;
    margin: 8px;
}

.element-spacer {
    height: 16px;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 5px,
        rgba(0,0,0,0.05) 5px,
        rgba(0,0,0,0.05) 10px
    );
}

.element-divider {
    height: 1px;
    background: #ddd;
    margin: 8px 0;
}

.element-switch,
.element-checkbox {
    padding: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
    color: #333;
}

.element-seekbar {
    padding: 12px;
    background: #f0f0f0;
    border-radius: 4px;
    margin: 4px;
}

.element-progress {
    padding: 8px;
    background: #e0e0e0;
    border-radius: 4px;
    margin: 4px;
}

.element-image {
    width: 100px;
    height: 100px;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    margin: 4px;
}

.element-spinner {
    padding: 12px;
    background: #f5f5f5;
    border: 1px solid #ddd;
    border-radius: 4px;
    margin: 4px;
    color: #333;
}

.element-scroll,
.element-frame,
.element-constraintLayout {
    min-height: 100px;
    padding: 8px;
    background: rgba(0,0,0,0.02);
    border: 1px dashed #ccc;
}

/* Drop zone indicator */
.drop-zone {
    min-height: 40px;
    border: 2px dashed #ccc;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 12px;
    margin: 4px;
    transition: all 0.2s;
    cursor: pointer;
}

.drop-zone:hover {
    border-color: #888;
    background: rgba(0,0,0,0.02);
}

.drop-zone.active,
.canvas-element.drag-over .drop-zone {
    border-color: var(--success);
    background: rgba(74, 222, 128, 0.15);
    color: var(--success);
}

/* Children container */
.children-container {
    display: contents;
}

.element-column > .children-container {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.element-row > .children-container {
    display: flex;
    flex-direction: row;
    flex: 1;
    flex-wrap: wrap;
}

/* Dragging state */
.canvas-element.dragging {
    opacity: 0.4;
    transform: scale(0.95);
}

/* Button full width */
.btn-full {
    width: 100%;
    margin-bottom: 8px;
    justify-content: center;
}

.btn-danger {
    background: #dc3545 !important;
    border-color: #dc3545 !important;
}

.btn-danger:hover {
    background: #c82333 !important;
}

/* Properties Panel */
.properties-content {
    flex: 1;
    overflow-y: auto;
}

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

.property-group h4 {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.property-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 12px;
}

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

.property-row input,
.property-row select,
.property-row textarea {
    padding: 8px 10px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 13px;
    width: 100%;
}

.property-row input:focus,
.property-row select:focus,
.property-row textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.property-row input[type="color"] {
    height: 36px;
    padding: 4px;
    cursor: pointer;
}

.property-row-inline {
    display: flex;
    gap: 8px;
}

.property-row-inline > div {
    flex: 1;
}

/* Component Tree */
.tree-section {
    border-top: 1px solid var(--border);
    padding-top: 16px;
    margin-top: auto;
}

.component-tree {
    font-size: 12px;
    font-family: 'JetBrains Mono', monospace;
}

.tree-item {
    padding: 4px 8px;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tree-item:hover {
    background: var(--bg-card);
}

.tree-item.selected {
    background: var(--accent);
    color: white;
}

.tree-item .tree-icon {
    font-size: 12px;
}

.tree-children {
    margin-left: 16px;
    border-left: 1px solid var(--border);
    padding-left: 8px;
}

/* Code Panel */
.code-panel {
    background: var(--bg-panel);
    border-top: 1px solid var(--border);
    max-height: 200px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    border-bottom: 1px solid var(--border);
}

.code-header h3 {
    font-size: 13px;
    margin: 0;
}

.code-actions {
    display: flex;
    gap: 8px;
}

.code-output {
    flex: 1;
    overflow: auto;
    padding: 12px 16px;
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 12px;
    line-height: 1.5;
    background: #1e1e2e;
    color: #cdd6f4;
}

.code-output code {
    display: block;
    white-space: pre;
}

/* Syntax highlighting */
.code-output .keyword { color: #cba6f7; }
.code-output .string { color: #a6e3a1; }
.code-output .number { color: #fab387; }
.code-output .function { color: #89b4fa; }
.code-output .comment { color: #6c7086; }

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--bg-panel);
    border-radius: 12px;
    width: 80%;
    max-width: 800px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border);
}

.modal-header h3 {
    margin: 0;
}

.preview-code {
    flex: 1;
    overflow: auto;
    padding: 20px;
    margin: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 13px;
    line-height: 1.6;
    background: #1e1e2e;
    color: #cdd6f4;
    white-space: pre;
}

/* Hints */
.hint {
    font-size: 12px;
    color: var(--text-muted);
    font-style: italic;
}

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

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

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

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

/* Toast notification */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--success);
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    font-size: 14px;
    z-index: 2000;
    animation: fadeInUp 0.3s ease;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}