/* ==========================================================================
   Digital Board Tool v3.0 - Modern Mobile-First Design
   ========================================================================== */

/* ========== CSS CUSTOM PROPERTIES ========== */
.tool-content-area .digital-board-container {
    /* Brand Colors */
    --db-primary: #15aebf;
    --db-primary-light: #4ecdc4;
    --db-primary-dark: #0e9bb2;
    --db-primary-rgb: 21, 174, 191;
    --db-secondary: #ff6b35;
    --db-accent: #ffd93d;

    /* Semantic Colors */
    --db-success: #10b981;
    --db-danger: #ef4444;
    --db-warning: #f59e0b;
    --db-info: #3b82f6;

    /* Neutral Colors */
    --db-white: #ffffff;
    --db-black: #000000;
    --db-gray-50: #f9fafb;
    --db-gray-100: #f3f4f6;
    --db-gray-200: #e5e7eb;
    --db-gray-300: #d1d5db;
    --db-gray-400: #9ca3af;
    --db-gray-500: #6b7280;
    --db-gray-600: #4b5563;
    --db-gray-700: #374151;
    --db-gray-800: #1f2937;
    --db-gray-900: #111827;

    /* Text Colors */
    --db-text-primary: #1f2937;
    --db-text-secondary: #4b5563;
    --db-text-muted: #9ca3af;

    /* Backgrounds */
    --db-bg-primary: var(--db-white);
    --db-bg-secondary: var(--db-gray-50);
    --db-bg-canvas: #e5e7eb;

    /* Borders */
    --db-border-color: var(--db-gray-200);
    --db-border-radius-sm: 0.375rem;
    --db-border-radius: 0.5rem;
    --db-border-radius-lg: 0.75rem;
    --db-border-radius-xl: 1rem;
    --db-border-radius-full: 9999px;

    /* Shadows */
    --db-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --db-shadow: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
    --db-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --db-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --db-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --db-shadow-primary: 0 4px 14px rgba(var(--db-primary-rgb), 0.4);

    /* Transitions */
    --db-transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --db-transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --db-transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);

    /* Spacing */
    --db-space-1: 0.25rem;
    --db-space-2: 0.5rem;
    --db-space-3: 0.75rem;
    --db-space-4: 1rem;
    --db-space-5: 1.25rem;
    --db-space-6: 1.5rem;

    /* Typography */
    --db-font-sans: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --db-font-rtl: 'Vazirmatn', var(--db-font-sans);
    --db-text-xs: 0.75rem;
    --db-text-sm: 0.875rem;
    --db-text-base: 1rem;

    /* Z-Index Scale */
    --db-z-canvas: 1;
    --db-z-controls: 10;
    --db-z-toolbar: 20;
    --db-z-overlay: 50;
    --db-z-modal: 100;
}

/* ========== BASE CONTAINER ========== */
.tool-content-area .digital-board-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    min-height: 0;
    background: var(--db-bg-secondary);
    font-family: var(--db-font-sans);
    gap: var(--db-space-2);
    padding: var(--db-space-2);
}

[dir="rtl"] .tool-content-area .digital-board-container {
    font-family: var(--db-font-rtl);
}

/* ========== TOOLBAR ========== */
.digital-board-container .toolbar {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    justify-content: center;
    gap: var(--db-space-3);
    padding: var(--db-space-2) var(--db-space-4);
    background: var(--db-bg-primary);
    border-radius: var(--db-border-radius-xl);
    box-shadow: var(--db-shadow-md);
    position: relative;
    z-index: var(--db-z-toolbar);
}

/* Tool Groups */
.digital-board-container .tool-group {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: var(--db-space-2);
}

.digital-board-container .tool-group__label {
    font-size: var(--db-text-xs);
    font-weight: 600;
    color: var(--db-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    white-space: nowrap;
}

.digital-board-container .tool-group__buttons {
    display: flex;
    gap: 2px;
    background: var(--db-gray-100);
    padding: 4px;
    border-radius: var(--db-border-radius-lg);
}

/* Tool Buttons */
.digital-board-container .tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    min-height: 36px;
    padding: 6px;
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--db-border-radius);
    color: var(--db-text-secondary);
    font-size: var(--db-text-xs);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--db-transition);
    position: relative;
}

/* Tooltip styling */
.digital-board-container .tool-btn[title]:hover::after,
.digital-board-container .action-btn[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 10px;
    background: var(--db-gray-800);
    color: var(--db-white);
    font-size: 11px;
    font-weight: 500;
    white-space: nowrap;
    border-radius: var(--db-border-radius);
    z-index: 100;
    pointer-events: none;
    box-shadow: var(--db-shadow-md);
}

.digital-board-container .tool-btn[title]:hover::before,
.digital-board-container .action-btn[title]:hover::before {
    content: '';
    position: absolute;
    bottom: calc(100% + 4px);
    left: 50%;
    transform: translateX(-50%);
    border: 4px solid transparent;
    border-top-color: var(--db-gray-800);
    z-index: 100;
    pointer-events: none;
}

.digital-board-container .tool-btn:hover {
    background: var(--db-white);
    color: var(--db-primary);
    transform: translateY(-1px);
    box-shadow: var(--db-shadow);
}

.digital-board-container .tool-btn.active {
    background: var(--db-white);
    border-color: var(--db-primary);
    color: var(--db-primary);
    box-shadow: var(--db-shadow-primary);
}

.digital-board-container .tool-btn .tool-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.digital-board-container .tool-btn__text {
    display: none;
}

/* Tool-specific colors */
.digital-board-container .tool-btn--pen.active { border-color: var(--db-success); color: var(--db-success); }
.digital-board-container .tool-btn--marker.active { border-color: var(--db-warning); color: var(--db-warning); }
.digital-board-container .tool-btn--highlighter.active { border-color: var(--db-accent); color: #b8860b; }
.digital-board-container .tool-btn--eraser.active { border-color: var(--db-danger); color: var(--db-danger); }

/* Shape Buttons */
.digital-board-container .tool-btn--shape {
    min-width: 34px;
    min-height: 34px;
    padding: 5px;
}

.digital-board-container .tool-btn--shape.active {
    border-color: var(--db-info);
    color: var(--db-info);
}

/* ========== CONTROLS ========== */
.digital-board-container .tool-group--controls {
    gap: var(--db-space-3);
    padding: var(--db-space-2);
    background: var(--db-gray-100);
    border-radius: var(--db-border-radius-lg);
}

.digital-board-container .control-item {
    display: flex;
    flex-direction: column;
    gap: var(--db-space-1);
}

.digital-board-container .control-label {
    font-size: var(--db-text-xs);
    font-weight: 600;
    color: var(--db-text-muted);
}

/* Size Slider */
.digital-board-container .size-slider-wrapper {
    display: flex;
    align-items: center;
    gap: var(--db-space-2);
}

.digital-board-container .size-slider {
    width: 100px;
    height: 6px;
    background: var(--db-gray-300);
    border-radius: var(--db-border-radius-full);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}

.digital-board-container .size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--db-primary-light), var(--db-primary));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--db-shadow-md);
    transition: all var(--db-transition);
    border: 2px solid var(--db-white);
}

.digital-board-container .size-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: var(--db-shadow-primary);
}

.digital-board-container .size-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: linear-gradient(135deg, var(--db-primary-light), var(--db-primary));
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--db-shadow-md);
    border: 2px solid var(--db-white);
}

.digital-board-container .size-preview {
    width: var(--preview-size, 10px);
    height: var(--preview-size, 10px);
    background: var(--db-gray-700);
    border-radius: 50%;
    transition: all var(--db-transition);
}

.digital-board-container .size-value {
    min-width: 24px;
    font-size: var(--db-text-sm);
    font-weight: 600;
    color: var(--db-text-primary);
    text-align: center;
}

/* Color Picker */
.digital-board-container .color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: var(--db-space-2);
}

.digital-board-container .color-picker {
    width: 36px;
    height: 36px;
    padding: 2px;
    border: 2px solid var(--db-gray-300);
    border-radius: var(--db-border-radius);
    cursor: pointer;
    transition: all var(--db-transition);
    background: var(--db-white);
}

.digital-board-container .color-picker:hover {
    border-color: var(--db-primary);
    transform: scale(1.05);
}

.digital-board-container .color-picker::-webkit-color-swatch-wrapper {
    padding: 0;
}

.digital-board-container .color-picker::-webkit-color-swatch {
    border: none;
    border-radius: var(--db-border-radius-sm);
}

/* Color Presets */
.digital-board-container .color-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    max-width: 140px;
}

.digital-board-container .color-preset {
    width: 24px;
    height: 24px;
    border: 2px solid var(--db-gray-300);
    border-radius: var(--db-border-radius-sm);
    cursor: pointer;
    transition: all var(--db-transition);
    padding: 0;
}

.digital-board-container .color-preset:hover {
    transform: scale(1.15);
    border-color: var(--db-gray-500);
    z-index: 1;
}

.digital-board-container .color-preset[data-color="#ffffff"] {
    border-color: var(--db-gray-400);
}

/* ========== ACTION BUTTONS ========== */
.digital-board-container .tool-group--actions {
    gap: 4px;
}

.digital-board-container .action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-width: 34px;
    min-height: 34px;
    padding: 6px;
    background: var(--db-gray-100);
    border: none;
    border-radius: var(--db-border-radius);
    color: var(--db-text-secondary);
    font-size: var(--db-text-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--db-transition);
    position: relative;
}

.digital-board-container .action-btn:hover:not(:disabled) {
    background: var(--db-gray-200);
    color: var(--db-text-primary);
    transform: translateY(-1px);
}

.digital-board-container .action-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.digital-board-container .action-btn .tool-icon {
    width: 18px;
    height: 18px;
}

.digital-board-container .action-btn__text {
    display: none;
}

.digital-board-container .action-divider {
    width: 1px;
    height: 24px;
    background: var(--db-gray-300);
    margin: 0 2px;
}

/* Divider between tool groups */
.digital-board-container .tool-group + .tool-group::before {
    content: '';
    width: 1px;
    height: 28px;
    background: var(--db-gray-300);
    margin-right: var(--db-space-3);
}

/* Specific action button colors */
.digital-board-container .action-btn--undo:hover:not(:disabled),
.digital-board-container .action-btn--redo:hover:not(:disabled) {
    background: rgba(var(--db-primary-rgb), 0.1);
    color: var(--db-primary);
}

.digital-board-container .action-btn--clear:hover:not(:disabled) {
    background: rgba(239, 68, 68, 0.1);
    color: var(--db-danger);
}

.digital-board-container .action-btn--upload,
.digital-board-container .action-btn--download {
    background: linear-gradient(135deg, var(--db-primary-light), var(--db-primary));
    color: var(--db-white);
    padding: 6px 10px;
}

.digital-board-container .action-btn--upload:hover,
.digital-board-container .action-btn--download:hover {
    background: linear-gradient(135deg, var(--db-primary), var(--db-primary-dark));
    color: var(--db-white);
    box-shadow: var(--db-shadow-primary);
}

/* File Input (hidden) */
.digital-board-container .file-input {
    display: none;
}

/* Toolbar Toggle (Mobile) */
.digital-board-container .toolbar-toggle {
    display: none;
    position: absolute;
    top: var(--db-space-2);
    right: var(--db-space-2);
    width: 40px;
    height: 40px;
    background: var(--db-white);
    border: 1px solid var(--db-border-color);
    border-radius: var(--db-border-radius);
    color: var(--db-text-secondary);
    cursor: pointer;
    z-index: var(--db-z-toolbar);
}

.digital-board-container .toolbar-toggle .tool-icon {
    width: 20px;
    height: 20px;
}

/* ========== CANVAS AREA ========== */
.digital-board-container .canvas-area {
    flex: 1;
    display: flex;
    min-height: 0;
    position: relative;
}

.digital-board-container .canvas-container {
    flex: 1;
    position: relative;
    background: var(--db-bg-canvas);
    border: 2px solid var(--db-border-color);
    border-radius: var(--db-border-radius-xl);
    overflow: hidden;
    min-height: 700px;
    box-shadow: var(--db-shadow-lg);
}

.digital-board-container .canvas {
    position: absolute;
    cursor: crosshair;
    z-index: var(--db-z-canvas);
    touch-action: none;
    pointer-events: auto;
    background: transparent;
}

.digital-board-container .canvas-background {
    position: absolute;
    background: #ffffff;
    z-index: 0;
    pointer-events: none;
}

.digital-board-container .background-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    object-position: center;
    z-index: 0;
    pointer-events: none;
}

/* ========== ZOOM CONTROLS ========== */
.digital-board-container .zoom-controls {
    position: absolute;
    bottom: var(--db-space-4);
    right: var(--db-space-4);
    display: flex;
    align-items: center;
    gap: var(--db-space-1);
    padding: var(--db-space-1);
    background: var(--db-white);
    border-radius: var(--db-border-radius-full);
    box-shadow: var(--db-shadow-lg);
    z-index: var(--db-z-controls);
}

.digital-board-container .zoom-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--db-text-secondary);
    cursor: pointer;
    transition: all var(--db-transition);
}

.digital-board-container .zoom-btn:hover {
    background: var(--db-gray-100);
    color: var(--db-primary);
}

.digital-board-container .zoom-btn svg {
    width: 16px;
    height: 16px;
}

.digital-board-container .zoom-level {
    font-size: var(--db-text-xs);
    font-weight: 600;
    color: var(--db-text-primary);
    min-width: 40px;
    text-align: center;
}

/* ========== LOADING OVERLAY ========== */
.digital-board-container .loading-overlay {
    display: none;
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(4px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--db-space-4);
    z-index: var(--db-z-overlay);
}

.digital-board-container .loading-overlay.show {
    display: flex;
}

.digital-board-container .loading-spinner {
    position: relative;
    width: 60px;
    height: 60px;
}

.digital-board-container .spinner-ring {
    position: absolute;
    inset: 0;
    border: 3px solid transparent;
    border-radius: 50%;
    animation: spin 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
}

.digital-board-container .spinner-ring:nth-child(1) {
    border-top-color: var(--db-primary);
    animation-delay: -0.45s;
}

.digital-board-container .spinner-ring:nth-child(2) {
    border-top-color: var(--db-primary-light);
    animation-delay: -0.3s;
    inset: 6px;
}

.digital-board-container .spinner-ring:nth-child(3) {
    border-top-color: var(--db-accent);
    animation-delay: -0.15s;
    inset: 12px;
}

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

.digital-board-container .loading-text {
    font-size: var(--db-text-sm);
    font-weight: 500;
    color: var(--db-text-secondary);
}

/* ========== STATUS BAR ========== */
.digital-board-container .status-bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: var(--db-space-3);
    padding: var(--db-space-2) var(--db-space-4);
    background: var(--db-bg-primary);
    border-radius: var(--db-border-radius-lg);
    box-shadow: var(--db-shadow);
    font-size: var(--db-text-xs);
}

.digital-board-container .status-section {
    display: flex;
    align-items: center;
    gap: var(--db-space-3);
}

.digital-board-container .status-item {
    display: flex;
    align-items: center;
    gap: var(--db-space-1);
}

.digital-board-container .status-label {
    color: var(--db-text-muted);
}

.digital-board-container .status-value {
    font-weight: 600;
    color: var(--db-text-primary);
}

.digital-board-container .status-color-swatch {
    width: 16px;
    height: 16px;
    border: 1px solid var(--db-gray-300);
    border-radius: var(--db-border-radius-sm);
}

/* File Info */
.digital-board-container .status-section--file {
    padding: var(--db-space-1) var(--db-space-2);
    background: rgba(var(--db-primary-rgb), 0.1);
    border-radius: var(--db-border-radius);
    color: var(--db-primary-dark);
}

.digital-board-container .status-icon {
    width: 14px;
    height: 14px;
}

.digital-board-container .file-name {
    font-weight: 500;
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.digital-board-container .file-remove-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    background: transparent;
    border: none;
    border-radius: 50%;
    color: var(--db-danger);
    cursor: pointer;
    transition: all var(--db-transition);
    padding: 0;
}

.digital-board-container .file-remove-btn:hover {
    background: rgba(239, 68, 68, 0.1);
}

.digital-board-container .file-remove-btn svg {
    width: 12px;
    height: 12px;
}

/* PDF Controls */
.digital-board-container .status-section--pdf {
    gap: var(--db-space-2);
}

.digital-board-container .pdf-nav-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--db-gray-100);
    border: none;
    border-radius: var(--db-border-radius);
    color: var(--db-text-secondary);
    cursor: pointer;
    transition: all var(--db-transition);
    padding: 0;
}

.digital-board-container .pdf-nav-btn:hover:not(:disabled) {
    background: var(--db-primary);
    color: var(--db-white);
}

.digital-board-container .pdf-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.digital-board-container .pdf-nav-btn svg {
    width: 14px;
    height: 14px;
}

.digital-board-container .pdf-page-info {
    font-weight: 600;
    color: var(--db-text-primary);
}

/* Shortcut Hints */
.digital-board-container .status-section--shortcuts {
    gap: var(--db-space-4);
    color: var(--db-text-muted);
}

.digital-board-container .shortcut-hint {
    display: flex;
    align-items: center;
    gap: var(--db-space-1);
}

.digital-board-container .shortcut-hint kbd {
    padding: 2px 6px;
    background: var(--db-gray-100);
    border: 1px solid var(--db-gray-300);
    border-radius: var(--db-border-radius-sm);
    font-family: inherit;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--db-text-secondary);
    box-shadow: var(--db-shadow-sm);
}

/* ========== FULLSCREEN MODE ========== */
.tool-page-wrapper:fullscreen .tool-content-area,
.tool-page-wrapper:-webkit-full-screen .tool-content-area {
    display: flex;
    flex-direction: column;
    height: 100vh;
    background: var(--db-bg-secondary);
}

.tool-page-wrapper:fullscreen .digital-board-container,
.tool-page-wrapper:-webkit-full-screen .digital-board-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tool-page-wrapper:fullscreen .canvas-area,
.tool-page-wrapper:-webkit-full-screen .canvas-area {
    flex: 1;
    display: flex;
    min-height: 400px;
}

.tool-page-wrapper:fullscreen .canvas-container,
.tool-page-wrapper:-webkit-full-screen .canvas-container {
    flex: 1;
    min-height: 400px;
    height: auto;
}

/* ========== FOCUS & ACCESSIBILITY ========== */
.digital-board-container *:focus {
    outline: 2px solid var(--db-primary);
    outline-offset: 2px;
}

.digital-board-container *:focus:not(:focus-visible) {
    outline: none;
}

.digital-board-container *:focus-visible {
    outline: 2px solid var(--db-primary);
    outline-offset: 2px;
}

/* ========== REDUCED MOTION ========== */
@media (prefers-reduced-motion: reduce) {
    .digital-board-container *,
    .digital-board-container *::before,
    .digital-board-container *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ========== RESPONSIVE - TABLET ========== */
@media (max-width: 1024px) {
    .digital-board-container .toolbar {
        gap: var(--db-space-2);
        padding: var(--db-space-2);
    }

    .digital-board-container .tool-group__label {
        display: none;
    }

    .digital-board-container .tool-group--controls {
        flex-wrap: wrap;
        gap: var(--db-space-2);
    }

    .digital-board-container .size-slider {
        width: 80px;
    }

    .digital-board-container .color-presets {
        max-width: 108px;
    }

    .digital-board-container .status-section--shortcuts {
        display: none;
    }
}

/* ========== RESPONSIVE - MOBILE ========== */
@media (max-width: 768px) {
    .tool-content-area .digital-board-container {
        padding: var(--db-space-1);
        gap: var(--db-space-1);
    }

    /* Collapsible Toolbar */
    .digital-board-container .toolbar {
        flex-direction: column;
        align-items: stretch;
        padding: var(--db-space-2);
        max-height: 60px;
        overflow: hidden;
        transition: max-height var(--db-transition-slow);
    }

    .digital-board-container .toolbar.expanded {
        max-height: 500px;
    }

    .digital-board-container .toolbar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .digital-board-container .tool-group {
        width: 100%;
    }

    .digital-board-container .tool-group__buttons {
        flex-wrap: wrap;
        justify-content: center;
    }

    .digital-board-container .tool-btn {
        min-width: 44px;
        min-height: 44px;
        padding: var(--db-space-2);
    }

    .digital-board-container .tool-btn--shape {
        min-width: 40px;
        min-height: 40px;
    }

    .digital-board-container .tool-group--controls {
        flex-direction: column;
        align-items: stretch;
    }

    .digital-board-container .control-item {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
    }

    .digital-board-container .size-slider-wrapper {
        flex: 1;
        max-width: 200px;
    }

    .digital-board-container .size-slider {
        flex: 1;
        width: 100%;
    }

    .digital-board-container .color-picker-wrapper {
        flex: 1;
        justify-content: flex-end;
    }

    .digital-board-container .color-presets {
        max-width: none;
        flex: 1;
        justify-content: flex-end;
    }

    .digital-board-container .tool-group--actions,
    .digital-board-container .tool-group--file {
        justify-content: center;
    }

    .digital-board-container .action-btn__text {
        display: inline;
    }

    /* Canvas */
    .digital-board-container .canvas-container {
        border-radius: var(--db-border-radius-lg);
        min-height: 500px;
    }

    /* Zoom controls */
    .digital-board-container .zoom-controls {
        bottom: var(--db-space-2);
        right: var(--db-space-2);
        padding: 4px;
    }

    .digital-board-container .zoom-btn {
        width: 28px;
        height: 28px;
    }

    .digital-board-container .zoom-level {
        font-size: 0.65rem;
        min-width: 32px;
    }

    /* Status Bar */
    .digital-board-container .status-bar {
        padding: var(--db-space-2);
        gap: var(--db-space-2);
        font-size: 0.65rem;
    }

    .digital-board-container .status-section--info {
        flex-wrap: wrap;
        gap: var(--db-space-2);
    }
}

/* ========== RESPONSIVE - SMALL MOBILE ========== */
@media (max-width: 480px) {
    .digital-board-container .tool-btn {
        min-width: 40px;
        min-height: 40px;
        padding: var(--db-space-1);
    }

    .digital-board-container .tool-btn .tool-icon {
        width: 18px;
        height: 18px;
    }

    .digital-board-container .action-btn {
        min-width: 36px;
        min-height: 36px;
        padding: var(--db-space-1);
    }

    .digital-board-container .action-btn__text {
        display: none;
    }

    .digital-board-container .color-preset {
        width: 20px;
        height: 20px;
    }

    .digital-board-container .color-picker {
        width: 32px;
        height: 32px;
    }
}

/* ========== TOUCH DEVICE OPTIMIZATIONS ========== */
@media (hover: none) and (pointer: coarse) {
    .digital-board-container .tool-btn:hover {
        transform: none;
        box-shadow: none;
    }

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

    .digital-board-container .action-btn:hover {
        transform: none;
    }

    .digital-board-container .action-btn:active {
        transform: scale(0.95);
    }

    .digital-board-container .size-slider::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }

    .digital-board-container .color-preset {
        width: 28px;
        height: 28px;
    }
}

/* ========== PRINT STYLES ========== */
@media print {
    .digital-board-container .toolbar,
    .digital-board-container .status-bar,
    .digital-board-container .zoom-controls {
        display: none !important;
    }

    .digital-board-container .canvas-area {
        display: block;
    }

    .digital-board-container .canvas-container {
        border: none;
        box-shadow: none;
    }
}