:root {
    --primary: #FF6B6B;
    /* SketchWow-ish accent color */
    --primary-hover: #EE5253;
    --bg-color: #F7F9FC;
    --panel-bg: #FFFFFF;
    --border-color: #E0E0E0;
    --text-color: #2D3436;
    --canvas-bg: #ffffff;
    --font-ui: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-hand: 'Comic Sans MS', 'Chalkboard SE', 'Marker Felt', 'Segoe UI Emoji', cursive;
}

* {
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-ui);
    background-color: var(--bg-color);
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* --- Top Header --- */
.app-header {
    height: 50px;
    background: var(--panel-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 16px;
    z-index: 10;
}

.logo-area {
    font-family: var(--font-hand);
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.btn {
    border: 1px solid var(--border-color);
    background: white;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-family: var(--font-ui);
    transition: background 0.2s;
}

.btn:hover {
    background: #f0f0f0;
}

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

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

/* --- Main Workspace --- */
.workspace {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
}

/* --- Left Container (Sidebar + Panel) --- */
.left-panel-container {
    display: flex;
    flex-direction: row;
    height: 100%;
    z-index: 5;
    background: var(--panel-bg);
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.05);
}

/* 1. Thin Main Toolbar */
.main-toolbar {
    width: 50px;
    background: #f8f9fa;
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding-top: 12px;
    gap: 8px;
}

.divider {
    width: 30px;
    height: 1px;
    background: #e0e0e0;
    margin: 4px 0;
}

.spacer {
    flex: 1;
}

/* 2. Library Panel */
.library-panel {
    width: 240px;
    background: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: width 0.3s ease, transform 0.3s ease;
    overflow: hidden;
}

/* Collapsed State (handled by JS toggling class or width) */
.library-panel.collapsed {
    width: 0;
    border-right: none;
}

.library-search {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    position: relative;
}

.library-search input {
    width: 100%;
    padding: 6px 10px 6px 30px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 13px;
    outline: none;
}

.library-search input:focus {
    border-color: var(--primary);
}

.library-search i {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
    font-size: 12px;
}

.library-content {
    flex: 1;
    overflow-y: auto;
    padding-bottom: 20px;
}

/* Accordion Categories */
.lib-category {
    border-bottom: 1px solid #f0f0f0;
}

.lib-header {
    padding: 10px 12px;
    background: white;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    font-weight: 500;
    color: #444;
}

.lib-header:hover {
    background: #f9f9f9;
}

.lib-header i {
    font-size: 10px;
    color: #999;
    transition: transform 0.2s;
}

/* Expanded state icon rotation */
.lib-category.expanded .lib-header i {
    transform: rotate(180deg);
}

.lib-grid {
    display: none;
    /* Hidden by default */
    padding: 10px;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
    background: #fafafa;
}

.lib-category.expanded .lib-grid {
    display: grid;
}

/* Tool Buttons (Shared Style) */
.tool-btn {
    width: 36px;
    height: 36px;
    border: 1px solid transparent;
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.1rem;
    color: var(--text-color);
    transition: all 0.2s;
    position: relative;
}

.tool-btn:hover {
    background: #eef2f7;
    border-color: #dce1e8;
}

.tool-btn.active {
    background: #FFEAA7;
    border-color: #FDCB6E;
    color: #d35400;
}

/* Import Button in Toolbar */
.tool-btn.import-btn {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.tool-btn.import-btn:hover {
    background: var(--primary-hover);
    color: white;
    border-color: var(--primary-hover);
    transform: scale(1.05);
}

/* Adjust tooltip position for sidebar vs library */
.main-toolbar .tool-btn::after {
    left: 100%;
    margin-left: 10px;
}

.library-panel .tool-btn::after {
    /* Tooltips might get clipped in scrollable area,
       or we can position them carefully. */
    top: -30px;
    left: 50%;
    transform: translateX(-50%);
    margin-left: 0;
}

.tool-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    background: #333;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 11px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 1000;
    /* Ensure high z-index */
}

.tool-btn:hover::after {
    opacity: 1;
}


/* --- Canvas Area --- */
#canvas-container {
    flex: 1;
    position: relative;
    background-color: var(--canvas-bg);
    /* Dot grid pattern */
    background-image: radial-gradient(#e0e0e0 1px, transparent 1px);
    background-size: 20px 20px;
    overflow: hidden;
    cursor: default;
    touch-action: none;
}

#scene-canvas {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1;
}

#text-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2;
    pointer-events: none;
    transform-origin: 0 0;
}

.text-input {
    position: absolute;
    background: transparent;
    border: 1px dashed transparent;
    padding: 4px;
    font-family: var(--font-hand);
    font-size: 20px;
    color: var(--text-color);
    resize: none;
    overflow: hidden;
    outline: none;
    pointer-events: auto;
    line-height: 1.2;
}

.text-input:focus {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.8);
}

.text-input.editing {
    border-color: var(--primary);
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 0 0 2px rgba(255, 107, 107, 0.2);
}

/* Text display mode - read-only, can be selected/moved */
.text-display {
    position: absolute;
    background: transparent;
    border: 1px dashed transparent;
    padding: 4px;
    font-family: var(--font-hand);
    font-size: 20px;
    color: var(--text-color);
    pointer-events: auto;
    cursor: default;
    line-height: 1.2;
    white-space: pre-wrap;
    word-wrap: break-word;
    user-select: none;
    -webkit-user-select: none;
}

.text-display:hover {
    border-color: rgba(0, 168, 255, 0.3);
}

/* --- Right Sidebar (Properties) --- */
.sidebar-right {
    width: 260px;
    background: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 5;
    overflow-y: auto;
}

.prop-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.prop-label {
    font-size: 12px;
    font-weight: 600;
    color: #636e72;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.prop-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

input[type="range"] {
    flex: 1;
}

.color-picker {
    width: 30px;
    height: 30px;
    border: 1px solid var(--border-color);
    padding: 0;
    border-radius: 4px;
    cursor: pointer;
}

/* --- Text Formatting Buttons --- */
.text-format-btns {
    display: flex;
    gap: 4px;
}

.format-btn {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

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

.format-btn:hover:not(.active) {
    background: #eef2f7;
}

#text-options-group {
    display: none;
}

#text-options-group.visible {
    display: flex;
}


/* --- Zoom Controls (Bottom Left) --- */
.zoom-controls {
    position: absolute;
    bottom: 20px;
    left: 20px;
    /* Adjusted since sidebar is separate container */
    background: white;
    padding: 4px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 10;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

/* --- Info Panel --- */
#info-toggle {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
    color: var(--text-color);
    transition: transform 0.2s;
}

#info-toggle:hover {
    transform: scale(1.1);
}

#info-panel {
    position: fixed;
    top: 60px;
    right: 20px;
    width: 320px;
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    z-index: 99;
    display: none;
    max-height: 80vh;
    overflow-y: auto;
}

#info-panel h3 {
    margin-top: 0;
    font-size: 1.1rem;
}

#info-panel h4 {
    margin: 12px 0 8px;
    font-size: 0.95rem;
}

#info-panel p,
#info-panel li {
    font-size: 0.9rem;
    color: #555;
    line-height: 1.5;
}

#info-panel ul {
    padding-left: 20px;
    margin: 8px 0;
}

/* --- Modals (Templates) --- */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal {
    background: white;
    padding: 24px;
    border-radius: 12px;
    width: 800px;
    max-width: 90%;
    max-height: 80vh;
    overflow-y: auto;
}

.template-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 16px;
    margin-top: 16px;
}

.template-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    cursor: pointer;
    transition: transform 0.2s;
    text-align: center;
}

.template-card:hover {
    transform: translateY(-2px);
    border-color: var(--primary);
}

.template-preview {
    height: 120px;
    background: #f0f0f0;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #aaa;
}

/* --- Cloud Provider Icons --- */
.lib-section-divider {
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 8px;
}

.lib-category.cloud-provider .lib-header span i {
    font-size: 14px;
}

.lib-subcategories {
    display: none;
    background: #f5f5f5;
    padding: 0;
    max-height: 400px;
    overflow-y: auto;
}

.lib-category.cloud-provider.expanded .lib-subcategories {
    display: block;
}

.cloud-subcat {
    border-bottom: 1px solid #e8e8e8;
}

.cloud-subcat-header {
    padding: 8px 12px;
    background: #f0f0f0;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    color: #555;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.cloud-subcat-header:hover {
    background: #e8e8e8;
}

.cloud-subcat-header i {
    font-size: 9px;
    color: #999;
    transition: transform 0.2s;
}

.cloud-subcat.expanded .cloud-subcat-header i {
    transform: rotate(90deg);
}

.cloud-icon-grid {
    display: none;
    padding: 8px;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    background: #fafafa;
}

.cloud-subcat.expanded .cloud-icon-grid {
    display: grid;
}

.cloud-icon-btn {
    width: 44px;
    height: 44px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    background: white;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 4px;
    transition: all 0.2s;
    position: relative;
}

.cloud-icon-btn:hover {
    border-color: var(--primary);
    background: #fff8f8;
    transform: scale(1.05);
}

.cloud-icon-btn img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.cloud-icon-btn::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: white;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 10px;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s;
    z-index: 1000;
    margin-bottom: 4px;
}

.cloud-icon-btn:hover::after {
    opacity: 1;
}

/* ============================================
   UX ENHANCEMENTS - ANIMATIONS
   ============================================ */

@keyframes pulse {

    0%,
    100% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.1);
    }
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0);
    }

    to {
        opacity: 0;
        transform: translateY(-10px);
    }
}

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

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }

    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

@keyframes glow {

    0%,
    100% {
        box-shadow: 0 0 5px rgba(255, 107, 107, 0.3);
    }

    50% {
        box-shadow: 0 0 20px rgba(255, 107, 107, 0.6);
    }
}

/* Tool button pulse on selection */
.tool-btn.pulse {
    animation: pulse 0.3s ease-out;
}

/* Enhanced hover states */
.tool-btn {
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.tool-btn:hover {
    background: #eef2f7;
    border-color: #dce1e8;
    transform: scale(1.05);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tool-btn:active {
    transform: scale(0.95);
}

.tool-btn.active {
    animation: glow 2s ease-in-out infinite;
}

/* ============================================
   CUSTOM CURSORS
   ============================================ */

#canvas-container[data-tool="rectangle"],
#canvas-container[data-tool="ellipse"],
#canvas-container[data-tool="diamond"],
#canvas-container[data-tool="triangle"] {
    cursor: crosshair;
}

#canvas-container[data-tool="hand"] {
    cursor: grab;
}

#canvas-container[data-tool="hand"].dragging {
    cursor: grabbing;
}

#canvas-container[data-tool="pen"] {
    cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24'%3E%3Cpath fill='%23333' d='M3 17.25V21h3.75L17.81 9.94l-3.75-3.75L3 17.25zM20.71 7.04c.39-.39.39-1.02 0-1.41l-2.34-2.34c-.39-.39-1.02-.39-1.41 0l-1.83 1.83 3.75 3.75 1.83-1.83z'/%3E%3C/svg%3E") 0 24, auto;
}

#canvas-container[data-tool="text"] {
    cursor: text;
}

#canvas-container[data-tool="arrow"],
#canvas-container[data-tool="line"] {
    cursor: crosshair;
}

/* ============================================
   TOAST NOTIFICATIONS
   ============================================ */

.toast-container {
    position: fixed;
    top: 70px;
    right: 20px;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border-left: 4px solid #666;
    pointer-events: auto;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    min-width: 250px;
    max-width: 400px;
}

.toast-show {
    opacity: 1;
    transform: translateX(0);
}

.toast-hide {
    opacity: 0;
    transform: translateX(100%);
}

.toast-success {
    border-left-color: #10b981;
}

.toast-success i {
    color: #10b981;
}

.toast-error {
    border-left-color: #ef4444;
}

.toast-error i {
    color: #ef4444;
}

.toast-warning {
    border-left-color: #f59e0b;
}

.toast-warning i {
    color: #f59e0b;
}

.toast-info {
    border-left-color: #3b82f6;
}

.toast-info i {
    color: #3b82f6;
}

.toast span {
    flex: 1;
    font-size: 14px;
    color: #333;
}

.toast-close {
    background: none;
    border: none;
    font-size: 18px;
    color: #999;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.toast-close:hover {
    color: #333;
}

/* ============================================
   KEYBOARD SHORTCUTS MODAL
   ============================================ */

.shortcuts-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10001;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.shortcuts-modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.shortcuts-modal {
    background: white;
    border-radius: 16px;
    padding: 24px;
    width: 600px;
    max-width: 90vw;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.shortcuts-modal-overlay.show .shortcuts-modal {
    transform: scale(1);
}

.shortcuts-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #eee;
}

.shortcuts-header h2 {
    margin: 0;
    font-size: 1.5rem;
}

.shortcuts-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: #666;
    padding: 4px 8px;
    border-radius: 4px;
}

.shortcuts-close:hover {
    background: #f0f0f0;
    color: #333;
}

.shortcuts-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 24px;
}

.shortcuts-section h3 {
    margin: 0 0 12px 0;
    font-size: 14px;
    text-transform: uppercase;
    color: #888;
    letter-spacing: 0.5px;
}

.shortcut-row {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    font-size: 13px;
}

.shortcut-row kbd {
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    padding: 2px 6px;
    font-family: monospace;
    font-size: 11px;
    color: #374151;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.shortcut-row span {
    color: #555;
}

/* ============================================
   KEYBOARD SHORTCUT BADGES
   ============================================ */

.tool-btn[data-shortcut]::before {
    content: attr(data-shortcut);
    position: absolute;
    bottom: 2px;
    right: 2px;
    font-size: 8px;
    background: rgba(0, 0, 0, 0.6);
    color: white;
    padding: 1px 3px;
    border-radius: 2px;
    font-family: monospace;
    font-weight: bold;
}

/* ============================================
   UNSAVED CHANGES INDICATOR
   ============================================ */

.unsaved-indicator {
    color: var(--primary);
    font-size: 24px;
    margin-left: 8px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.unsaved-indicator.show {
    opacity: 1;
}

/* ============================================
   DRAWING PREVIEW / GHOST
   ============================================ */

.drawing-preview {
    position: absolute;
    pointer-events: none;
    border: 2px dashed var(--primary);
    background: rgba(255, 107, 107, 0.1);
    border-radius: 4px;
}

/* ============================================
   BOX SELECTION RECTANGLE
   ============================================ */

.box-selection {
    position: absolute;
    border: 1px dashed #00a8ff;
    background: rgba(0, 168, 255, 0.1);
    pointer-events: none;
    z-index: 100;
}

/* ============================================
   SMART GUIDES
   ============================================ */

.smart-guide {
    position: absolute;
    background: #ff6b6b;
    pointer-events: none;
    z-index: 99;
}

.smart-guide.horizontal {
    height: 1px;
    width: 100%;
    left: 0;
}

.smart-guide.vertical {
    width: 1px;
    height: 100%;
    top: 0;
}

/* ============================================
   GRID OVERLAY
   ============================================ */

#canvas-container.show-grid {
    background-image:
        linear-gradient(to right, #e0e0e0 1px, transparent 1px),
        linear-gradient(to bottom, #e0e0e0 1px, transparent 1px);
    background-size: 20px 20px;
}

/* ============================================
   CONTEXTUAL MINI TOOLBAR
   ============================================ */

.mini-toolbar {
    position: fixed;
    display: flex;
    gap: 4px;
    padding: 6px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    animation: fadeIn 0.2s ease;
}

.mini-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #555;
    transition: all 0.2s ease;
}

.mini-btn:hover {
    background: #f0f0f0;
    color: var(--primary);
}

.mini-btn:active {
    transform: scale(0.9);
}

/* ============================================
   ZOOM DROPDOWN
   ============================================ */

.zoom-dropdown-container {
    position: relative;
}

.zoom-dropdown {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: white;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    padding: 8px;
    display: none;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 8px;
    min-width: 100px;
}

.zoom-dropdown.show {
    display: flex;
}

.zoom-preset {
    border: none;
    background: transparent;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    text-align: center;
    transition: background 0.2s ease;
}

.zoom-preset:hover {
    background: #f0f0f0;
}

/* ============================================
   FIRST TIME TUTORIAL OVERLAY
   ============================================ */

.tutorial-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 10002;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.tutorial-overlay.show {
    opacity: 1;
    visibility: visible;
}

.tutorial-spotlight {
    position: absolute;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.7);
    border-radius: 8px;
    transition: all 0.4s ease;
}

.tutorial-tooltip {
    position: absolute;
    background: white;
    border-radius: 12px;
    padding: 20px;
    width: 300px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.3s ease;
}

.tutorial-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

.tutorial-description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin-bottom: 16px;
}

.tutorial-actions {
    display: flex;
    justify-content: space-between;
    gap: 12px;
}

.tutorial-skip {
    background: none;
    border: none;
    color: #888;
    cursor: pointer;
    font-size: 13px;
}

.tutorial-skip:hover {
    color: #333;
}

.tutorial-next {
    background: var(--primary);
    color: white;
    border: none;
    padding: 8px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: background 0.2s ease;
}

.tutorial-next:hover {
    background: var(--primary-hover);
}

.tutorial-progress {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 16px;
}

.progress-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ddd;
    transition: all 0.2s ease;
}

.progress-dot.active {
    background: var(--primary);
    transform: scale(1.2);
}

.progress-dot.completed {
    background: #10b981;
}

/* ============================================
   EMPTY STATE OVERLAY
   ============================================ */

.empty-state-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    background: rgba(247, 249, 252, 0.9);
    z-index: 50;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.empty-state-overlay.show {
    opacity: 1;
    visibility: visible;
}

.empty-state-content {
    text-align: center;
    padding: 40px;
}

.empty-state-icon {
    font-size: 64px;
    color: var(--primary);
    margin-bottom: 20px;
    opacity: 0.7;
}

.empty-state-content h2 {
    font-size: 24px;
    color: #333;
    margin: 0 0 12px 0;
}

.empty-state-content p {
    color: #666;
    font-size: 14px;
    margin: 0 0 24px 0;
}

.empty-state-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.empty-state-hint {
    margin-top: 24px !important;
    font-size: 12px !important;
    color: #999 !important;
}

.empty-state-hint kbd {
    background: #f3f4f6;
    border: 1px solid #e5e7eb;
    border-radius: 4px;
    padding: 2px 6px;
    font-family: monospace;
}

/* ============================================
   LOADING SPINNER
   ============================================ */

.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10003;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-spinner {
    text-align: center;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f0f0f0;
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 12px;
}

.loading-text {
    color: #666;
    font-size: 14px;
}

/* ============================================
   RECENTLY USED SHAPES
   ============================================ */

.recent-shapes-section {
    border-bottom: 2px solid var(--primary);
    background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
}

.recent-shapes-section .lib-header {
    color: var(--primary);
    font-weight: 600;
}

.recent-shapes-section .lib-header i {
    color: var(--primary);
}

/* ============================================
   ACCESSIBILITY IMPROVEMENTS
   ============================================ */

/* Visible focus indicators */
.tool-btn:focus-visible,
.btn:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Skip link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    z-index: 10004;
    transition: top 0.3s ease;
}

.skip-link:focus {
    top: 0;
}

/* High contrast mode */
@media (prefers-contrast: high) {
    .tool-btn {
        border: 2px solid #000;
    }

    .tool-btn.active {
        background: #000;
        color: #fff;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .tool-btn.active {
        animation: none;
    }
}

/* ============================================
   CONTEXTUAL TIPS
   ============================================ */

.contextual-tip {
    position: fixed;
    background: #333;
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 12px;
    z-index: 1001;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s ease;
    max-width: 200px;
}

.contextual-tip.show {
    opacity: 1;
}

.contextual-tip::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 6px solid #333;
}