/* ============================================
   PhotoshopAI - Advanced Professional Photo Editor
   Version: 1.0.0
   Developer: Sumit Sen
   
   Dark Theme: Professional Workspace Styling
   ============================================ */

:root {
    /* Color Palette */
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #e8e8e8;
    --text-secondary: #a8a8a8;
    --accent-primary: #0078d4;
    --accent-hover: #1084d8;
    --border-color: #404040;
    --success: #4caf50;
    --warning: #ff9800;
    --error: #f44336;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    --font-size-sm: 11px;
    --font-size-base: 12px;
    --font-size-lg: 14px;
    --font-size-xl: 16px;

    /* Borders & Radius */
    --border-width: 1px;
    --border-radius: 3px;

    /* Z-Index Scale */
    --z-dropdown: 100;
    --z-modal: 1000;
    --z-tooltip: 500;
}

/* ============= GLOBAL RESET ============= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: var(--font-family);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============= APP LAYOUT ============= */
.app-container {
    display: flex;
    flex-direction: column;
    width: 100%;
    height: 100vh;
    background-color: var(--bg-primary);
}

/* ============= TOP MENU BAR ============= */
.top-menu-bar {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-secondary);
    border-bottom: var(--border-width) solid var(--border-color);
    height: 36px;
    flex-shrink: 0;
}

.menu-left {
    display: flex;
    gap: 0;
}

.menu-group {
    position: relative;
}

.menu-button {
    padding: var(--spacing-xs) var(--spacing-md);
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.menu-button:hover {
    background-color: var(--bg-tertiary);
}

.menu-button:active {
    background-color: var(--accent-primary);
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-secondary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    min-width: 200px;
    z-index: var(--z-dropdown);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

.dropdown-menu.active {
    display: block;
}

.menu-item {
    display: block;
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: none;
    border: none;
    text-align: left;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.menu-item:hover {
    background-color: var(--bg-tertiary);
}

.menu-divider {
    height: var(--border-width);
    background-color: var(--border-color);
    margin: var(--spacing-xs) 0;
}

/* ============= OPTIONS BAR ============= */
.options-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-secondary);
    border-bottom: var(--border-width) solid var(--border-color);
    height: 40px;
    flex-shrink: 0;
    overflow-x: auto;
}

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

.option-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.option-label {
    color: var(--text-secondary);
    white-space: nowrap;
}

.option-slider {
    width: 80px;
    height: 4px;
    border-radius: 2px;
    background: var(--bg-tertiary);
    outline: none;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.option-slider:hover {
    background: var(--border-color);
}

.option-button {
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border: var(--border-width) solid var(--border-color);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

.option-button:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent-primary);
}

/* ============= WORKSPACE ============= */
.workspace {
    display: flex;
    flex: 1;
    overflow: hidden;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--bg-primary);
}

/* ============= LEFT TOOLBAR ============= */
.left-toolbar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background-color: var(--bg-secondary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    width: 60px;
    flex-shrink: 0;
    overflow-y: auto;
}

.toolbar-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding-bottom: var(--spacing-md);
    border-bottom: var(--border-width) solid var(--border-color);
}

.toolbar-section:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.tool-group-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
    padding: var(--spacing-xs);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.tool-button {
    width: 44px;
    height: 44px;
    border: var(--border-width) solid transparent;
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 18px;
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.tool-button:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent-primary);
}

.tool-button.active {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 8px rgba(0, 120, 212, 0.3);
}

.tool-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.color-swatches {
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: var(--border-width) solid var(--border-color);
}

.swatch-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.color-boxes {
    position: relative;
    width: 44px;
    height: 44px;
    margin: 0 auto var(--spacing-sm);
}

.color-swatch {
    position: absolute;
    width: 30px;
    height: 30px;
    border: var(--border-width) solid var(--border-color);
    cursor: pointer;
    border-radius: 3px;
}

.fg-color {
    top: 0;
    left: 0;
    z-index: 2;
}

.bg-color {
    bottom: 0;
    right: 0;
    z-index: 1;
}

.swap-button {
    width: 100%;
    padding: var(--spacing-xs);
    background-color: var(--bg-tertiary);
    border: var(--border-width) solid var(--border-color);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
}

.swap-button:hover {
    background-color: var(--bg-primary);
    border-color: var(--accent-primary);
}

/* ============= CANVAS VIEWPORT ============= */
.canvas-viewport {
    flex: 1;
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
}

.canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-primary);
    overflow: auto;
    cursor: crosshair;
    position: relative;
}

.canvas-container::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

.canvas-container::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

.canvas-container::-webkit-scrollbar-thumb:hover {
    background: var(--border-color);
}

#main-canvas {
    background-color: white;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    cursor: crosshair;
}

.viewport-info {
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-secondary);
    border-top: var(--border-width) solid var(--border-color);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

/* ============= RIGHT SIDEBAR ============= */
.right-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 250px;
    flex-shrink: 0;
    overflow-y: auto;
}

.sidebar-panel {
    background-color: var(--bg-secondary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

.panel-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

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

.panel-action-btn {
    width: 24px;
    height: 24px;
    background-color: var(--bg-secondary);
    border: var(--border-width) solid var(--border-color);
    color: var(--text-primary);
    font-size: var(--font-size-lg);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.panel-action-btn:hover {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* ============= LAYERS PANEL ============= */
.layers-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.layer-item {
    display: grid;
    grid-template-columns: 20px 1fr 20px;
    gap: var(--spacing-sm);
    align-items: center;
    padding: var(--spacing-sm);
    background-color: var(--bg-primary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.layer-item:hover {
    background-color: var(--bg-tertiary);
}

.layer-item.active {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.layer-visibility {
    display: flex;
    justify-content: center;
}

.layer-visible {
    cursor: pointer;
}

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

.layer-name {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.layer-controls {
    display: flex;
    align-items: center;
}

.layer-opacity {
    width: 100%;
    height: 3px;
    border-radius: 1px;
    background: var(--bg-secondary);
    outline: none;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.layer-lock {
    display: flex;
    justify-content: center;
}

.layer-lock-input {
    cursor: pointer;
}

/* ============= HISTORY PANEL ============= */
.history-list {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.history-item {
    padding: var(--spacing-sm);
    background-color: var(--bg-primary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.history-item:hover {
    background-color: var(--bg-tertiary);
}

.history-item.active {
    background-color: var(--accent-primary);
    border-color: var(--accent-primary);
}

/* ============= NAVIGATOR PANEL ============= */
.navigator-view {
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border-top: var(--border-width) solid var(--border-color);
}

#navigator-canvas {
    width: 100%;
    height: auto;
    background-color: white;
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
}

/* ============= MODALS ============= */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: var(--z-modal) - 1;
}

.modal-overlay.active {
    display: block;
}

.modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: var(--bg-secondary);
    border: var(--border-width) solid var(--border-color);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    z-index: var(--z-modal);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.7);
    max-width: 500px;
    width: 90%;
}

.modal.active {
    display: block;
}

.modal-content h2 {
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

.modal-content textarea {
    width: 100%;
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border: var(--border-width) solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    resize: none;
}

.export-options {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.export-options label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-base);
}

.export-options input[type="radio"] {
    cursor: pointer;
}

.modal-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.modal-buttons button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--accent-primary);
    border: none;
    color: white;
    font-size: var(--font-size-base);
    cursor: pointer;
    border-radius: var(--border-radius);
    transition: background-color 0.2s ease;
}

.modal-buttons button:hover {
    background-color: var(--accent-hover);
}

.modal-buttons button:last-child {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: var(--border-width) solid var(--border-color);
}

.modal-buttons button:last-child:hover {
    background-color: var(--bg-primary);
}

/* ============= TOAST NOTIFICATIONS ============= */
#toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    pointer-events: none;
}

.toast {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-secondary);
    border: var(--border-width) solid var(--border-color);
    border-left: 3px solid var(--accent-primary);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    animation: slideIn 0.3s ease;
    pointer-events: auto;
}

.toast.success {
    border-left-color: var(--success);
}

.toast.warning {
    border-left-color: var(--warning);
}

.toast.error {
    border-left-color: var(--error);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* ============= SCROLLBARS ============= */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: 5px;
}

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

/* ============= RESPONSIVE ============= */
@media (max-width: 1024px) {
    .right-sidebar {
        width: 200px;
    }

    .options-left, .options-center {
        display: none;
    }
}

@media (max-width: 768px) {
    .workspace {
        flex-direction: column;
    }

    .left-toolbar {
        width: 100%;
        height: 60px;
        flex-direction: row;
        overflow-x: auto;
    }

    .toolbar-section {
        flex-direction: row;
        padding: 0 var(--spacing-sm);
        border: none;
        border-right: var(--border-width) solid var(--border-color);
    }

    .right-sidebar {
        width: 100%;
        height: 150px;
        flex-direction: row;
    }

    .sidebar-panel {
        flex: 1;
    }
}