/* CollageMaker Styles */

/* Override base body styles for full-width app layout */
body {
    margin: 0;
    padding: 0;
    max-width: none;
    height: 100vh;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Toolbar */
.collage-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-3) var(--space-6);
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-surface-variant);
    box-shadow: var(--elevation-1);
    flex-shrink: 0;
    z-index: 100;
}

.app-title {
    margin: 0;
    font-size: var(--font-size-xl);
    color: var(--color-primary);
    font-weight: 600;
}

.app-title-group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.home-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-1);
    border-radius: var(--radius-small);
    min-width: 44px;
    min-height: 44px;
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.home-link:hover {
    color: var(--color-primary);
    background-color: var(--color-surface-variant);
}

.home-link:active {
    background-color: var(--color-background);
    transform: scale(0.95);
}

.home-link:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.home-icon {
    font-size: 18px;
}

.toolbar-actions {
    display: flex;
    gap: var(--space-3);
    align-items: center;
}

.pure-button-primary {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border: none;
    border-radius: var(--radius-small);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: background-color var(--transition-fast);
    min-height: 44px;
}

.pure-button-primary:hover {
    background-color: var(--color-primary-hover);
}

.pure-button {
    background-color: var(--color-surface-variant);
    color: var(--color-text-primary);
    border: none;
    border-radius: var(--radius-small);
    padding: var(--space-2) var(--space-4);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    min-height: 44px;
}

.pure-button:hover:not(:disabled) {
    background-color: var(--color-background);
}

.pure-button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Main three-panel layout */
.main-layout {
    display: flex;
    flex: 1;
    overflow: hidden;
    min-height: 0;
}

/* Sidebars */
.sidebar {
    width: 260px;
    min-width: 200px;
    max-width: 350px;
    background-color: var(--color-surface);
    border-right: 1px solid var(--color-surface-variant);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    flex-shrink: 0;
    transition: width 0.25s ease, min-width 0.25s ease, border-width 0.25s ease;
}

.sidebar-right {
    border-right: none;
    border-left: 1px solid var(--color-surface-variant);
    transition: width 0.25s ease, min-width 0.25s ease, border-width 0.25s ease;
}

.sidebar h3 {
    margin: 0;
    padding: var(--space-4) var(--space-4) var(--space-2);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
    flex-shrink: 0;
}

/* Image Library */
.library-search {
    padding: 0 var(--space-4) var(--space-3);
    flex-shrink: 0;
}

.library-search input {
    width: 100%;
    box-sizing: border-box;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-surface-variant);
    border-radius: var(--radius-small);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    font-size: var(--font-size-sm);
}

.library-search input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.image-library {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--space-3) var(--space-4);
    min-height: 0;
}

.empty-library {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-8) var(--space-4);
    text-align: center;
    color: var(--color-text-secondary);
}

.empty-library p {
    margin: var(--space-2) 0;
    font-size: var(--font-size-sm);
}

.empty-library .hint {
    font-size: var(--font-size-xs);
    opacity: 0.7;
}

.image-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    margin-bottom: var(--space-2);
    border-radius: var(--radius-small);
    background-color: var(--color-background);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    position: relative;
}

.image-item:hover {
    background-color: var(--color-surface-variant);
}

.image-item.selected {
    background-color: var(--color-surface-variant);
    box-shadow: inset 0 0 0 2px var(--color-primary);
}

.image-number {
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-text-secondary);
    min-width: 20px;
    text-align: center;
}

.image-thumb {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
    flex-shrink: 0;
}

.image-name {
    flex: 1;
    font-size: var(--font-size-xs);
    color: var(--color-text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
}

.remove-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    transition: opacity var(--transition-fast), background-color var(--transition-fast);
    flex-shrink: 0;
    min-width: 44px;
    min-height: 44px;
}

.remove-btn:hover {
    opacity: 1;
    background-color: rgba(186, 26, 26, 0.1);
}

.remove-btn .material-icons {
    font-size: 16px;
    color: var(--color-error);
}

/* App root - must constrain flex chain to viewport */
#app {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
}

/* Canvas Area */
.canvas-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: var(--color-background);
    overflow: hidden;
    padding: var(--space-4);
    min-width: 0;
    min-height: 0;
}

.canvas-container {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
    border-radius: var(--radius-medium);
    overflow: hidden;
    min-height: 0;
}

.canvas-container.drag-over,
body.drag-over .canvas-container {
    outline: 3px dashed var(--color-primary);
    outline-offset: -3px;
}

.canvas-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--color-text-secondary);
    padding: var(--space-8);
}

.canvas-placeholder h3 {
    margin: var(--space-4) 0 var(--space-2);
    font-size: var(--font-size-lg);
}

.canvas-placeholder p {
    font-size: var(--font-size-sm);
    max-width: 300px;
}

#previewCanvas {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--radius-small);
    box-shadow: var(--elevation-2);
    background-color: #ffffff;
    touch-action: none;
}

/* Detail Section */
.detail-section {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-surface-variant);
}

.detail-section label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-primary);
    margin-bottom: var(--space-2);
}

.detail-section select {
    width: 100%;
    box-sizing: border-box;
}

.fullRange {
    width: 100%;
}

/* Theme toggle positioning for this app */
#themeToggle {
    position: fixed;
    top: var(--space-3);
    right: var(--space-3);
    z-index: 200;
    min-width: 44px;
    min-height: 44px;
    padding: var(--space-2);
    background-color: var(--color-surface-variant);
    border: none;
    color: var(--color-text-primary);
    cursor: pointer;
    border-radius: var(--radius-small);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast);
}

#themeToggle:hover {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
}

#themeToggle .material-icons {
    font-size: 20px;
}

/* Scrollbar styling */
.image-library::-webkit-scrollbar,
.sidebar::-webkit-scrollbar {
    width: 6px;
}

.image-library::-webkit-scrollbar-track,
.sidebar::-webkit-scrollbar-track {
    background: transparent;
}

.image-library::-webkit-scrollbar-thumb,
.sidebar::-webkit-scrollbar-thumb {
    background-color: var(--color-surface-variant);
    border-radius: 3px;
}

.image-library::-webkit-scrollbar-thumb:hover,
.sidebar::-webkit-scrollbar-thumb:hover {
    background-color: var(--color-text-secondary);
}

/* Toolbar icon buttons and divider */
.toolbar-divider {
    width: 1px;
    height: 24px;
    background-color: var(--color-surface-variant);
    margin: 0 var(--space-2);
}

.toolbar-icon-btn {
    padding: var(--space-2);
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    border-radius: var(--radius-small);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.toolbar-icon-btn:hover:not(:disabled) {
    background-color: var(--color-surface-variant);
}

.toolbar-icon-btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.toolbar-icon-btn .material-icons {
    font-size: 20px;
}

/* Crop Preview Section */
.crop-preview-section {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-surface-variant);
}

.crop-preview-canvas {
    width: 100%;
    aspect-ratio: 4 / 3;
    max-height: 180px;
    background-color: #000000;
    border-radius: var(--radius-small);
    cursor: grab;
    box-shadow: var(--elevation-1);
}

.crop-preview-canvas:active {
    cursor: grabbing;
}

.crop-info {
    display: flex;
    justify-content: space-between;
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    font-family: var(--font-mono, 'SF Mono', 'Consolas', monospace);
}

.crop-info-item {
    background-color: var(--color-background);
    padding: 2px 6px;
    border-radius: 3px;
}

.reset-crop-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-3);
    background-color: var(--color-background);
    border: 1px solid var(--color-surface-variant);
    border-radius: var(--radius-small);
    color: var(--color-text-primary);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    min-height: 44px;
}

.reset-crop-btn:hover {
    background-color: var(--color-surface-variant);
}

/* Crop Placeholder Section */
.crop-placeholder-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-6) var(--space-4);
    text-align: center;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-surface-variant);
}

.crop-placeholder-icon {
    font-size: 40px;
    opacity: 0.3;
    margin-bottom: var(--space-2);
}

.crop-placeholder-section p {
    font-size: var(--font-size-sm);
    margin: 0;
    line-height: 1.4;
}

/* ========================
 * Right Sidebar Scrollable
 * ======================== */

.sidebar-scroll-container {
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

/* Sidebar collapsed state */
.sidebar-collapsed {
    width: 0 !important;
    min-width: 0 !important;
    padding: 0 !important;
    border-left: none !important;
    overflow: hidden !important;
}

/* ========================
 * Segmented Control
 * ======================== */

.segmented-control {
    display: flex;
    border: 1px solid var(--color-surface-variant);
    border-radius: var(--radius-small);
    overflow: hidden;
}

.segment-btn {
    flex: 1;
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    background-color: var(--color-background);
    color: var(--color-text-primary);
    border: none;
    border-right: 1px solid var(--color-surface-variant);
    cursor: pointer;
    transition: background-color var(--transition-fast), color var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
}

.segment-btn:last-child {
    border-right: none;
}

.segment-btn:hover {
    background-color: var(--color-surface-variant);
}

.segment-btn.active {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
}

/* ========================
 * Color Picker Row
 * ======================== */

.color-picker-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.color-picker-row input[type="color"] {
    flex: 1;
    height: 44px;
    min-height: 44px;
    padding: 0;
    border: 1px solid var(--color-surface-variant);
    border-radius: var(--radius-small);
    cursor: pointer;
    background: none;
}

.color-hex {
    font-size: var(--font-size-xs);
    font-family: var(--font-mono, 'SF Mono', 'Consolas', monospace);
    color: var(--color-text-secondary);
}

/* ========================
 * Formatting Bar (Title)
 * ======================== */

.formatting-bar {
    display: flex;
    gap: var(--space-1);
}

.format-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-background);
    border: 1px solid var(--color-surface-variant);
    border-radius: var(--radius-small);
    color: var(--color-text-primary);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-fast);
}

.format-btn:hover:not(:disabled) {
    background-color: var(--color-surface-variant);
}

.format-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

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

/* ========================
 * File Input Styled
 * ======================== */

.file-input-styled {
    font-size: var(--font-size-xs);
    width: 100%;
}

.file-input-styled::-webkit-file-upload-button {
    background-color: var(--color-surface-variant);
    color: var(--color-text-primary);
    border: none;
    border-radius: var(--radius-small);
    padding: var(--space-1) var(--space-3);
    font-size: var(--font-size-xs);
    cursor: pointer;
    margin-right: var(--space-2);
}

/* ========================
 * Remove Buttons
 * ======================== */

.remove-bg-btn,
.remove-overlay-btn {
    margin-top: var(--space-2);
    width: 100%;
    font-size: var(--font-size-xs);
    padding: var(--space-1) var(--space-2);
    background-color: var(--color-background);
    border: 1px solid var(--color-surface-variant);
    color: var(--color-error);
    min-height: 44px;
}

.remove-bg-btn:hover,
.remove-overlay-btn:hover {
    background-color: rgba(186, 26, 26, 0.08);
}

/* ========================
 * Export Section
 * ======================== */

.export-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-4);
    min-height: 44px;
}

.export-status {
    margin-top: var(--space-2);
    font-size: var(--font-size-xs);
    text-align: center;
    padding: var(--space-1);
    border-radius: var(--radius-small);
}

.status-success {
    color: #2e7d32;
    background-color: rgba(46, 125, 50, 0.08);
}

.status-error {
    color: var(--color-error);
    background-color: rgba(186, 26, 26, 0.08);
}

/* Export spinner animation */
.export-spinner {
    vertical-align: middle;
    margin-right: 4px;
    animation: export-spin 1s linear infinite;
}
@keyframes export-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
@media (prefers-reduced-motion: reduce) {
    .export-spinner {
        animation: none;
    }
}

/* ========================
 * Checkbox styling in detail sections
 * ======================== */

.detail-section label > input[type="checkbox"] {
    margin-right: var(--space-2);
    vertical-align: middle;
}

/* ========================
 * Range input styling
 * ======================== */

input[type="range"].fullRange {
    accent-color: var(--color-primary);
}

/* ========================
 * Collapsible Sidebar Sections
 * ======================== */

.sidebar-section {
    border-bottom: 1px solid var(--color-surface-variant);
}

.sidebar-section-header {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-3) var(--space-4);
    background: none;
    border: none;
    cursor: pointer;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-text-primary);
    text-align: left;
    transition: background-color var(--transition-fast);
}

.sidebar-section-header:hover {
    background-color: var(--color-surface-variant);
}

.sidebar-section-header:focus {
    outline: none;
    background-color: var(--color-surface-variant);
}

.section-chevron {
    display: inline-block;
    font-size: 10px;
    transition: transform 0.2s ease;
    color: var(--color-text-secondary);
    flex-shrink: 0;
    width: 12px;
    text-align: center;
}

.section-chevron.expanded {
    transform: rotate(90deg);
}

.sidebar-section-content {
    overflow: hidden;
}

/* ========================
 * Layout Shortcut Hint
 * ======================== */

.layout-shortcut-hint {
    font-size: 11px;
    color: var(--color-text-secondary, #888);
    padding: 4px 16px 8px;
    opacity: 0.7;
    line-height: 1.4;
}

/* ========================
 * Toast Notification
 * ======================== */

.toast-notification {
    position: fixed;
    bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    left: 50%;
    transform: translateX(-50%);
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    z-index: 9999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    transition: opacity 0.3s ease;
}
.toast-info { background-color: #3b82f6; color: white; }
.toast-success { background-color: #22c55e; color: white; }
.toast-error { background-color: #ef4444; color: white; }
.toast-notification .material-icons { font-size: 18px; }

/* ========================
 * Section Count Badge
 * ======================== */

.section-count {
    font-weight: 400;
    font-size: var(--font-size-sm);
    opacity: 0.7;
}

/* Library search inside collapsible section */
.sidebar-section-content .library-search {
    padding: 0 var(--space-4) var(--space-3);
}

/* ========================
 * Title Textarea (multi-line)
 * ======================== */

.title-textarea {
    resize: vertical;
    min-height: 60px;
    max-height: 150px;
    font-family: inherit;
    line-height: 1.4;
    white-space: pre-wrap;
    word-wrap: break-word;
}

/* ========================
 * Image Loading Progress Overlay
 * ======================== */

.progress-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.4);
    border-radius: var(--radius-small);
    z-index: 10;
    gap: 12px;
    pointer-events: none;
}

.progress-bar-track {
    width: 200px;
    height: 6px;
    background-color: rgba(255, 255, 255, 0.3);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: 3px;
    transition: width 0.2s ease;
}

.progress-label {
    color: white;
    font-size: var(--font-size-sm);
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}