/* Enhanced Builder Interface - Modern & Professional */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #6366f1;
    --primary-hover: #5855eb;
    --primary-light: #e0e7ff;
    --secondary-color: #64748b;
    --secondary-light: #f1f5f9;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #fafbfc;
    --surface: #ffffff;
    --surface-hover: #f8fafc;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    --radius: 8px;
    --radius-sm: 6px;
    --radius-lg: 12px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

body {
    font-family: var(--font-sans);
    background-color: var(--background);
    color: var(--text-primary);
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
    font-feature-settings: 'cv02', 'cv03', 'cv04', 'cv11';
}

.builder-container {
    display: flex;
    height: 100vh;
    width: 100vw;
}

/* Enhanced Top Bar */
.builder-topbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    z-index: 1000;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.builder-topbar-left {
    display: flex;
    align-items: center;
    gap: 16px;
}

.builder-logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    margin-right: 8px;
}

.builder-project-select {
    min-width: 200px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background-color: var(--surface);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.builder-project-select:hover {
    border-color: var(--primary-color);
}

.builder-project-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.builder-new-project-btn {
    padding: 8px 16px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.builder-new-project-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.builder-new-project-btn:active {
    transform: translateY(0);
}

.builder-save-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    transition: var(--transition);
}

.builder-save-indicator.saving {
    background-color: var(--warning-color);
    color: white;
}

.builder-save-indicator.saved {
    background-color: var(--success-color);
    color: white;
}

.builder-save-indicator.unsaved {
    background-color: var(--secondary-light);
    color: var(--text-secondary);
}

.builder-save-indicator::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
}

.builder-save-indicator.saving::before {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Enhanced Left Sidebar - Component Gallery */
.builder-sidebar-left {
    width: 320px;
    background: var(--surface);
    border-right: 1px solid var(--border);
    padding: 84px 20px 20px;
    overflow-y: auto;
    overflow-x: hidden;
}

.builder-gallery-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.builder-gallery-title::before {
    content: '🧩';
    font-size: 20px;
}

.builder-component-gallery {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

.builder-component-item {
    background: var(--surface);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 16px;
    cursor: grab;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.builder-component-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.builder-component-item:active {
    cursor: grabbing;
    transform: scale(0.98);
}

.builder-component-item.dragging {
    opacity: 0.6;
    transform: rotate(2deg);
    z-index: 1000;
}

.builder-component-thumbnail {
    width: 100%;
    aspect-ratio: 16 / 10;
    background: linear-gradient(135deg, var(--primary-light) 0%, var(--secondary-light) 100%);
    border-radius: var(--radius);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.builder-component-thumbnail::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent 49%, rgba(255,255,255,0.1) 50%, transparent 51%);
    pointer-events: none;
}

.builder-component-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-sm);
}

.builder-component-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: center;
}

/* Enhanced Preview Area */
.builder-preview-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 84px 24px 24px;
    overflow-y: auto;
    overflow-x: hidden;
    background: var(--background);
    align-items: center;
}

.builder-preview-controls {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
    background: var(--surface);
    padding: 6px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.builder-device-btn {
    padding: 10px 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.builder-device-btn:hover {
    background: var(--surface-hover);
    color: var(--text-primary);
}

.builder-device-btn.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

.builder-preview-container {
    background: var(--surface);
    min-height: 600px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    position: relative;
    margin: 0 auto;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    overflow: visible;
    border: 1px solid var(--border-light);
}

.builder-preview-container.mobile {
    width: 375px;
}

.builder-preview-container.tablet {
    width: 768px;
}

.builder-preview-container.desktop {
    width: 100%;
    max-width: 1200px;
}

.builder-preview-content {
    position: relative;
    width: 100%;
    min-height: 100%;
    overflow: visible;
    border-radius: var(--radius-lg);
}

.builder-section-wrapper {
    position: relative;
    border: 2px dashed transparent;
    transition: var(--transition);
    width: 100%;
    min-height: 1px;
    border-radius: var(--radius-sm);
}

.builder-section-wrapper:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.02);
}

.builder-section-wrapper.selected {
    border-color: var(--primary-color);
    border-style: solid;
    background: rgba(99, 102, 241, 0.05);
}

.builder-section-controls {
    position: absolute;
    top: 12px;
    right: 12px;
    display: flex;
    gap: 6px;
    opacity: 0;
    transition: var(--transition);
    z-index: 100;
    background: var(--surface);
    padding: 4px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
}

.builder-section-wrapper:hover .builder-section-controls,
.builder-section-wrapper.selected .builder-section-controls {
    opacity: 1;
    transform: translateY(-2px);
}

.builder-section-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: var(--transition);
    font-weight: 500;
}

.builder-section-btn.delete {
    background: var(--danger-color);
    color: white;
}

.builder-section-btn.delete:hover {
    background: #dc2626;
    transform: scale(1.05);
}

.builder-section-btn.settings {
    background: var(--primary-color);
    color: white;
}

.builder-section-btn.settings:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.builder-section-drag-handle {
    position: absolute;
    top: 12px;
    left: 12px;
    width: 32px;
    height: 32px;
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: move;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 100;
    box-shadow: var(--shadow);
}

.builder-section-wrapper:hover .builder-section-drag-handle,
.builder-section-wrapper.selected .builder-section-drag-handle {
    opacity: 1;
    transform: translateY(-2px);
}

.builder-section-drag-handle:hover {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* Enhanced Right Sidebar - Settings */
.builder-sidebar-right {
    width: 360px;
    background: var(--surface);
    border-left: 1px solid var(--border);
    padding: 84px 24px 24px;
    overflow-y: auto;
    overflow-x: hidden;
}

.builder-settings-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 24px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.builder-settings-title::before {
    content: '⚙️';
    font-size: 20px;
}

.builder-settings-section {
    margin-bottom: 24px;
    padding: 20px;
    background: var(--surface-hover);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.builder-settings-section:hover {
    border-color: var(--border);
    box-shadow: var(--shadow-sm);
}

.builder-settings-section:last-child {
    margin-bottom: 0;
}

/* Element Settings Styles */
.builder-element-settings {
    margin-bottom: 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--surface);
}

.builder-element-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: var(--surface-hover);
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.builder-element-header:hover {
    background: var(--border-light);
}

.builder-element-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.builder-element-toggle {
    color: var(--text-muted);
    font-size: 12px;
    transition: transform 0.2s;
}

.builder-element-content {
    padding: 16px;
    background: var(--surface);
}

.builder-settings-group {
    margin-bottom: 20px;
}

.builder-settings-group-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-light);
}

.builder-style-control {
    margin-bottom: 16px;
}

.builder-style-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.builder-settings-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.builder-settings-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
    margin-bottom: 16px;
}

.builder-settings-input:hover {
    border-color: var(--primary-color);
}

.builder-settings-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.builder-color-picker {
    width: 100%;
    height: 44px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    margin-bottom: 16px;
    transition: var(--transition);
    background: var(--surface);
}

.builder-color-picker:hover {
    border-color: var(--primary-color);
    transform: scale(1.02);
}

.builder-color-control {
    margin-bottom: 16px;
}

.builder-color-control-label {
    display: block;
    font-size: 12px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-secondary);
}

.builder-save-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--success-color) 0%, #059669 100%);
    color: white;
    border: none;
    border-radius: var(--radius-lg);
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    margin-top: 24px;
    position: relative;
    overflow: hidden;
}

.builder-save-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transition: width 0.3s, height 0.3s;
    transform: translate(-50%, -50%);
}

.builder-save-btn:hover::before {
    width: 300px;
    height: 300px;
}

.builder-save-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.builder-save-btn:active {
    transform: translateY(0);
}

.builder-empty-state {
    text-align: center;
    padding: 80px 20px;
    color: var(--text-muted);
}

.builder-empty-state-icon {
    font-size: 64px;
    margin-bottom: 24px;
    opacity: 0.6;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.builder-empty-state-text {
    font-size: 16px;
    font-weight: 500;
    margin-bottom: 8px;
}

.builder-empty-state-subtext {
    font-size: 14px;
    opacity: 0.7;
}

/* Enhanced Scrollbar */
.builder-sidebar-left::-webkit-scrollbar,
.builder-sidebar-right::-webkit-scrollbar,
.builder-preview-area::-webkit-scrollbar {
    width: 6px;
}

.builder-sidebar-left::-webkit-scrollbar-track,
.builder-sidebar-right::-webkit-scrollbar-track,
.builder-preview-area::-webkit-scrollbar-track {
    background: transparent;
}

.builder-sidebar-left::-webkit-scrollbar-thumb,
.builder-sidebar-right::-webkit-scrollbar-thumb,
.builder-preview-area::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
    transition: var(--transition);
}

.builder-sidebar-left::-webkit-scrollbar-thumb:hover,
.builder-sidebar-right::-webkit-scrollbar-thumb:hover,
.builder-preview-area::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Loading States */
.loading-skeleton {
    background: linear-gradient(90deg, var(--border-light) 25%, var(--surface) 50%, var(--border-light) 75%);
    background-size: 200% 100%;
    animation: loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-sm);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* Enhanced Drag Feedback */
.builder-component-item.dragging {
    opacity: 0.8;
    transform: rotate(3deg) scale(1.05);
    z-index: 1000;
    box-shadow: var(--shadow-xl);
}

.builder-preview-content.drag-over {
    background: var(--primary-light);
    border: 2px dashed var(--primary-color);
    border-radius: var(--radius-lg);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .builder-sidebar-right {
        width: 320px;
    }
}

@media (max-width: 1024px) {
    .builder-sidebar-left {
        width: 280px;
    }
    
    .builder-sidebar-right {
        width: 300px;
    }
}

/* Focus States for Accessibility */
*:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Selection Colors */
::selection {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* Improved Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-primary);
}

/* Enhanced Button States */
button, .btn {
    font-family: inherit;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

button:disabled, .btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

/* Glass Effect for Modern Look */
.glass-effect {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Enhanced Animations */
@keyframes success-bounce {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes fadeOut {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-20px); }
}

@keyframes slideInFromRight {
    0% { opacity: 0; transform: translateX(100%); }
    100% { opacity: 1; transform: translateX(0); }
}

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

.success-animation {
    animation: success-bounce 0.3s ease-in-out;
}

/* Sortable Animations */
.sortable-ghost {
    opacity: 0.4;
    background: var(--primary-light);
    border: 2px dashed var(--primary-color);
}

.sortable-chosen {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.sortable-drag {
    transform: rotate(2deg);
    box-shadow: var(--shadow-xl);
}

/* Notification Styles */
.notification {
    font-family: var(--font-sans);
}

.notification-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.notification-message {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.notification-close {
    background: none;
    border: none;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: var(--transition);
}

.notification-close:hover {
    background: var(--border-light);
    color: var(--text-primary);
}

/* Enhanced Drag Feedback */
.builder-preview-content.drag-over {
    background: linear-gradient(135deg, var(--primary-light) 0%, rgba(99, 102, 241, 0.1) 100%);
    border: 2px dashed var(--primary-color);
    border-radius: var(--radius-lg);
    animation: pulse-glow 1s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
    0% { box-shadow: 0 0 5px var(--primary-color); }
    100% { box-shadow: 0 0 20px var(--primary-color); }
}