/* ============================================
   MARKDOWN PREVIEW - BASE LAYOUT & STRUCTURE
   ============================================ */

/* Calculator Layout */
.calculator-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
    min-height: calc(100vh - 300px);
}

.calculator-panel {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    display: flex;
    flex-direction: column;
}

.panel-header {
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h2 { font-size: 1.5rem; margin-bottom: 4px; }
.panel-header p { color: var(--text-secondary); font-size: 0.9375rem; }

/* Tool Icon Header */
.tool-icon-header {
    width: 48px;
    height: 48px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.tool-icon-header.it {
    background: var(--accent-it-dim);
    color: var(--accent-it);
}

/* Back Link */
.back-link {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.15s ease;
}

.back-link:hover {
    color: var(--accent-it);
}

.back-link svg {
    width: 16px;
    height: 16px;
}

/* Usage Banner */
.info-banner {
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.2);
    color: var(--accent-it);
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 0.8125rem;
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
}

.info-banner svg {
    flex-shrink: 0;
}

/* Sample Links */
.sample-link {
    background: none;
    border: none;
    color: var(--accent-it);
    cursor: pointer;
    text-decoration: underline;
    font-size: inherit;
    font-family: inherit;
    padding: 0;
}

.sample-link:hover {
    color: var(--accent-it);
}

/* Header Tool Icon Group */
.header-tool-icon-group {
    margin-top: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}

/* Warning Banner */
.warning-banner {
    background: var(--accent-warning-dim);
    border: 1px solid rgba(234, 179, 8, 0.3);
    color: var(--accent-warning);
    padding: 10px 14px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 0.8125rem;
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: 'Space Grotesk', sans-serif;
}

.warning-banner.hidden {
    display: none;
}

/* Toolbar */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
    align-items: center;
}

.toolbar-group {
    display: flex;
    gap: 6px;
    align-items: center;
}

.tool-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    white-space: nowrap;
}

.tool-btn:hover:not(:disabled) {
    border-color: var(--accent-it);
    background: var(--bg-card);
}

.tool-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.tool-btn.danger {
    color: var(--accent-error);
    border-color: rgba(239, 68, 68, 0.3);
}

.tool-btn.danger:hover:not(:disabled) {
    border-color: var(--accent-error);
    background: var(--accent-error-dim);
}

.tool-btn svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
}

/* Toolbar Separator */
.tool-sep {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 4px;
}

/* Workspace (Editor + Preview) */
.workspace {
    display: flex;
    gap: 0;
    flex: 1;
    min-height: 500px;
}

.editor-pane, .preview-pane {
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    flex: 1;
    min-width: 200px;
}

.pane-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 14px;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.pane-header .pane-title {
    display: flex;
    align-items: center;
    gap: 8px;
}

.pane-header svg {
    width: 14px;
    height: 14px;
}

/* Editor Textarea */
#editor {
    flex: 1;
    width: 100%;
    background: transparent;
    border: none;
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    resize: none;
    outline: none;
    line-height: 1.7;
}

#editor::placeholder {
    color: var(--text-muted);
}

/* Preview Container */
.preview-container {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.9375rem;
    line-height: 1.7;
    color: var(--text-primary);
}

.preview-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
    padding: 40px;
}

.preview-placeholder svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.sidebar-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
}

.sidebar-card h3 {
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-card h3 svg {
    width: 16px;
    height: 16px;
    color: var(--accent-it);
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.8125rem;
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-label {
    color: var(--text-secondary);
}

.stat-val {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--accent-it);
}

/* Images Card */
.image-upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    margin-bottom: 12px;
}

.image-upload-zone:hover,
.image-upload-zone.drag-over {
    border-color: var(--accent-it);
    background: var(--accent-it-dim);
}

.image-upload-zone svg {
    width: 24px;
    height: 24px;
    color: var(--text-muted);
    margin-bottom: 8px;
}

.image-upload-zone p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin: 0;
}

.image-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 200px;
    overflow-y: auto;
}

.image-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
}

.image-item img {
    width: 40px;
    height: 40px;
    object-fit: cover;
    border-radius: 4px;
}

.image-item-info {
    flex: 1;
    min-width: 0;
}

.image-item-name {
    font-size: 0.75rem;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.image-item-size {
    font-size: 0.6875rem;
    color: var(--text-muted);
}

.image-item-actions {
    display: flex;
    gap: 4px;
}

.image-item-btn {
    padding: 4px 8px;
    font-size: 0.625rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.image-item-btn:hover {
    border-color: var(--accent-it);
    color: var(--text-primary);
}

.image-item-btn.delete:hover {
    border-color: var(--accent-error);
    color: var(--accent-error);
}

.storage-info {
    font-size: 0.6875rem;
    color: var(--text-muted);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed var(--border-color);
}

/* Status Card */
.status-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-success);
}

.status-dot.warning {
    background: var(--accent-warning);
}

.status-dot.error {
    background: var(--accent-error);
}

.status-text {
    font-size: 0.875rem;
    color: var(--text-primary);
}

.status-time {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.status-btn {
    width: 100%;
    padding: 8px;
    font-size: 0.75rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.status-btn:hover {
    border-color: var(--accent-error);
    color: var(--accent-error);
}

/* Disclaimer Card */
.disclaimer-card {
    background: var(--bg-card);
    border: 1px solid rgba(6, 182, 212, 0.4);
    border-left: 4px solid var(--accent-it);
    padding: 20px;
    border-radius: 8px;
}

.disclaimer-card h4 {
    color: var(--accent-it);
    font-size: 0.8rem;
    text-transform: uppercase;
    margin-bottom: 8px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 8px;
}

.disclaimer-card h4 svg {
    width: 14px;
    height: 14px;
}

.disclaimer-content {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.disclaimer-content ul {
    padding-left: 20px;
    margin: 0;
}

.disclaimer-content li {
    margin-bottom: 6px;
}

.disclaimer-content li:last-child {
    margin-bottom: 0;
}

/* Split View Resizer */
.split-resizer {
    width: 12px;
    cursor: col-resize;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    flex-shrink: 0;
}

.split-resizer::before {
    content: '';
    width: 4px;
    height: 40px;
    background: var(--border-color);
    border-radius: 2px;
    transition: background 0.2s, height 0.2s;
}

.split-resizer:hover::before,
.split-resizer.dragging::before {
    background: var(--accent-it);
    height: 60px;
}

.workspace.resizing {
    cursor: col-resize;
    user-select: none;
}

.workspace.resizing .editor-pane,
.workspace.resizing .preview-pane {
    pointer-events: none;
}

/* Sync scroll indicator */
.sync-scroll-indicator {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    padding: 4px;
    border-radius: 4px;
    background: var(--bg-card);
    opacity: 0;
    transition: opacity 0.2s;
    pointer-events: none;
}

.sync-scroll-indicator.visible {
    opacity: 1;
}

/* Virtual Scrolling */
.preview-section {
    content-visibility: auto;
    contain-intrinsic-size: auto 200px;
}

/* Responsive */
@media (max-width: 1024px) {
    .calculator-layout {
        grid-template-columns: 1fr;
    }

    .workspace {
        flex-direction: column;
    }

    .editor-pane, .preview-pane {
        flex: 1 !important;
        min-height: 300px;
    }

    .split-resizer {
        display: none;
    }

    .toolbar {
        flex-wrap: wrap;
    }

    .toolbar-group {
        flex-wrap: wrap;
    }
}

@media (max-width: 768px) {
    .tool-btn span.btn-text {
        display: none;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .split-resizer::before,
    .sync-scroll-indicator {
        transition: none;
    }
}