static/style.css

/* ==================== Reset & Variables ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg: #f6f7fb;
    --bg-gradient: radial-gradient(1200px 800px at 15% -10%, #eef2ff 0%, transparent 55%),
                   radial-gradient(1000px 700px at 110% 110%, #fdf4ff 0%, transparent 60%),
                   #f6f7fb;
    --panel-bg: #ffffff;
    --panel-bg-subtle: #f8fafc;
    --border: #e5e7eb;
    --border-light: #eef0f4;
    --border-hover: #d1d5db;
    --text: #0f172a;
    --text-secondary: #64748b;
    --text-placeholder: #94a3b8;
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-light: #eef2ff;
    --primary-dark: #4338ca;
    --primary-ring: rgba(99, 102, 241, 0.18);
    --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    --success: #10b981;
    --success-light: #ecfdf5;
    --warning: #f59e0b;
    --warning-light: #fffbeb;
    --danger: #ef4444;
    --danger-light: #fef2f2;
    --info: #64748b;
    --info-light: #f1f5f9;
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 4px 20px rgba(15, 23, 42, 0.08);
    --shadow-primary: 0 4px 14px rgba(99, 102, 241, 0.25);
    --radius-sm: 6px;
    --radius: 10px;
    --radius-lg: 14px;
    --transition: all 160ms cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', ui-sans-serif, -apple-system, BlinkMacSystemFont,
                 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif,
                 'Apple Color Emoji', 'Segoe UI Emoji';
    background: var(--bg-gradient);
    color: var(--text);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==================== App Layout ==================== */
.app {
    height: 100vh;
    display: flex;
    flex-direction: column;
    padding: 14px;
    gap: 12px;
}

/* ==================== History Bar ==================== */
.history-bar {
    flex-shrink: 0;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    padding: 0 18px;
    height: 52px;
    gap: 14px;
}

.history-title {
    font-weight: 700;
    font-size: 11.5px;
    color: var(--text-secondary);
    flex-shrink: 0;
    user-select: none;
    letter-spacing: 0.7px;
    text-transform: uppercase;
}

.history-scroll {
    flex: 1;
    display: flex;
    gap: 6px;
    overflow-x: auto;
    overflow-y: hidden;
    align-items: center;
    padding: 4px 0;
}

.history-scroll::-webkit-scrollbar {
    height: 3px;
}

.history-scroll::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 2px;
}

.history-empty {
    color: var(--text-placeholder);
    font-size: 13px;
    white-space: nowrap;
}

.history-clear-btn {
    flex-shrink: 0;
}

/* History Item */
.history-item {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 4px 8px;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: var(--bg);
    font-size: 11px;
    white-space: nowrap;
}

.history-item:hover {
    border-color: var(--primary);
    background: var(--primary-light);
}

.history-thumb {
    width: 26px;
    height: 26px;
    border-radius: 3px;
    object-fit: cover;
    border: 1px solid var(--border);
}

.history-thumb.repeated {
    border: 2px solid #333;
}

.history-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: 3px;
    font-size: 10px;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.history-badge.badge-p { background: var(--primary); }
.history-badge.badge-c { background: var(--warning); }
.history-badge.badge-s { background: var(--success); }

.history-type-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-secondary);
}

.history-separator {
    width: 1px;
    height: 22px;
    background: var(--border);
    flex-shrink: 0;
    margin: 0 2px;
}

/* History group tinting — one muted palette with a subtle left-accent bar */
.history-item.hc-0 { background: var(--panel-bg); border-color: var(--border); border-left: 3px solid #6366f1; }
.history-item.hc-1 { background: var(--panel-bg); border-color: var(--border); border-left: 3px solid #10b981; }
.history-item.hc-2 { background: var(--panel-bg); border-color: var(--border); border-left: 3px solid #f59e0b; }
.history-item.hc-3 { background: var(--panel-bg); border-color: var(--border); border-left: 3px solid #ef4444; }
.history-item.hc-4 { background: var(--panel-bg); border-color: var(--border); border-left: 3px solid #64748b; }
.history-item.hc-5 { background: var(--panel-bg); border-color: var(--border); border-left: 3px solid #06b6d4; }
.history-item.hc-0:hover,
.history-item.hc-1:hover,
.history-item.hc-2:hover,
.history-item.hc-3:hover,
.history-item.hc-4:hover,
.history-item.hc-5:hover {
    background: var(--primary-light);
    border-color: var(--primary);
}

/* ==================== Workspace (CSS Grid) ==================== */
.workspace {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr minmax(280px, 0.45fr);
    grid-template-rows: 1fr auto auto;
    gap: 10px;
    min-height: 0;
}

/* Grid placement */
.image-panel  { grid-row: 1; grid-column: 1; }
.sp-panel     { grid-row: 1; grid-column: 2; }
.params-bar   { grid-row: 2; grid-column: 1; }
.gen-sp-btn   { grid-row: 2; grid-column: 2; }
.prompt-bar   { grid-row: 3; grid-column: 1; }
.gen-image-btn { grid-row: 3; grid-column: 2; }

/* ==================== Panel Base ==================== */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.panel-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 14px;
    border-bottom: 1px solid var(--border-light);
    background: var(--panel-bg-subtle);
    flex-shrink: 0;
}

.panel-label {
    font-weight: 700;
    font-size: 11.5px;
    color: var(--text-secondary);
    letter-spacing: 0.7px;
    text-transform: uppercase;
    user-select: none;
}

.panel-actions {
    display: flex;
    gap: 2px;
}

/* Tool Buttons */
.tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

.tool-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--border-light);
}

/* ==================== Image Panel ==================== */
.image-panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.image-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 0;
    overflow: hidden;
}

/* Dropzone */
.dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    width: calc(100% - 28px);
    height: calc(100% - 28px);
    margin: 14px;
    cursor: pointer;
    border: 1.5px dashed var(--border-hover);
    border-radius: var(--radius);
    transition: var(--transition);
    background: var(--panel-bg-subtle);
}

.dropzone:hover,
.dropzone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    transform: scale(1.005);
}

.dropzone-icon {
    font-size: 44px;
    opacity: 0.55;
    transition: var(--transition);
}

.dropzone:hover .dropzone-icon {
    opacity: 0.85;
    transform: translateY(-2px);
}

.dropzone-text {
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.1px;
}

/* Image Display */
.image-display {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}

.image-display img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    cursor: pointer;
    border-radius: 4px;
    transition: opacity 0.2s;
}

.image-display img:hover {
    opacity: 0.95;
}

/* BBox Overlay */
.bbox-container {
    position: absolute;
    pointer-events: none;
    display: none;
}

.bbox-box {
    position: absolute;
    border: 2px solid;
    pointer-events: auto;
    cursor: default;
    border-radius: 2px;
}

.bbox-box.focused {
    border-width: 3px;
    z-index: 10;
}

.bbox-box.active {
    border-width: 3px;
    z-index: 10;
    cursor: move;
}

.bbox-box .bbox-handle {
    display: none;
}

.bbox-box.active .bbox-handle {
    display: block;
}

.bbox-box .bbox-label {
    position: absolute;
    top: -20px;
    left: -1px;
    padding: 1px 6px;
    font-size: 10px;
    color: white;
    border-radius: 3px 3px 0 0;
    white-space: nowrap;
    max-width: 140px;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
    line-height: 16px;
    pointer-events: none;
}

/* BBox Resize Handles */
.bbox-handle {
    position: absolute;
    width: 8px;
    height: 8px;
    background: white;
    border: 2px solid;
    border-radius: 2px;
    pointer-events: auto;
    z-index: 11;
}
.bbox-handle.h-nw { top: -5px; left: -5px; cursor: nw-resize; }
.bbox-handle.h-ne { top: -5px; right: -5px; cursor: ne-resize; }
.bbox-handle.h-sw { bottom: -5px; left: -5px; cursor: sw-resize; }
.bbox-handle.h-se { bottom: -5px; right: -5px; cursor: se-resize; }
.bbox-handle.h-n  { top: -5px; left: 50%; margin-left: -4px; cursor: n-resize; }
.bbox-handle.h-s  { bottom: -5px; left: 50%; margin-left: -4px; cursor: s-resize; }
.bbox-handle.h-w  { top: 50%; margin-top: -4px; left: -5px; cursor: w-resize; }
.bbox-handle.h-e  { top: 50%; margin-top: -4px; right: -5px; cursor: e-resize; }

/* ==================== Structured Prompt Panel ==================== */
.sp-panel {
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.sp-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 0;
    position: relative;
    overflow: hidden;
}

.sp-empty {
    text-align: center;
    color: var(--text-placeholder);
    padding: 20px;
}

.sp-empty-icon {
    font-size: 36px;
    margin-bottom: 8px;
    opacity: 0.5;
}

.sp-empty-hint {
    font-size: 12px;
    margin-top: 6px;
    color: var(--text-placeholder);
}

.sp-area textarea {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    resize: none;
    padding: 12px;
    font-family: 'SF Mono', 'Monaco', 'Menlo', 'Consolas', 'Liberation Mono', monospace;
    font-size: 12px;
    line-height: 1.65;
    color: var(--text);
    background: transparent;
    tab-size: 2;
}

.sp-area textarea::placeholder {
    color: var(--text-placeholder);
}

/* ==================== SP Structured View ==================== */
.sp-structured {
    width: 100%;
    height: 100%;
    overflow-y: auto;
    padding: 8px;
}

/* Section (collapsible) */
.sp-section {
    border: 1px solid var(--border-light);
    border-radius: 6px;
    margin-bottom: 6px;
    overflow: hidden;
    background: var(--panel-bg);
}

.sp-section:last-child {
    margin-bottom: 0;
}

.sp-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 7px 10px;
    cursor: pointer;
    user-select: none;
    font-size: 12px;
    font-weight: 600;
    color: var(--text);
    transition: var(--transition);
}

.sp-section-header:hover {
    background: var(--bg);
}

.sp-section-title {
    display: flex;
    align-items: center;
    gap: 6px;
}

.sp-section-badge {
    background: var(--primary);
    color: white;
    border-radius: 8px;
    padding: 0 6px;
    font-size: 10px;
    font-weight: 700;
    line-height: 16px;
    min-width: 16px;
    text-align: center;
}

.sp-section-actions {
    display: flex;
    align-items: center;
    gap: 4px;
}

.sp-section-add-btn {
    width: 20px;
    height: 20px;
    border: 1px dashed var(--border);
    background: transparent;
    color: var(--text-secondary);
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: var(--transition);
    padding: 0;
    line-height: 1;
}

.sp-section-add-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.sp-section-clear-btn {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--text-placeholder);
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    transition: var(--transition);
    padding: 0;
    opacity: 0;
}

.sp-section-header:hover .sp-section-clear-btn {
    opacity: 1;
}

.sp-section-clear-btn:hover {
    background: var(--danger-light);
    color: var(--danger);
}

.sp-section-arrow {
    font-size: 12px;
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.sp-section.collapsed .sp-section-arrow {
    transform: rotate(-90deg);
}

.sp-section-body {
    padding: 4px 8px 8px;
    overflow: hidden;
}

.sp-section.collapsed .sp-section-body {
    display: none;
}

/* Field row */
.sp-field {
    display: flex;
    align-items: flex-start;
    padding: 4px 6px;
    border-radius: 4px;
    transition: background 0.15s;
    gap: 8px;
    position: relative;
}

.sp-field:hover {
    background: #f5f7fa;
}

.sp-field-key {
    font-size: 11px;
    font-weight: 600;
    color: var(--primary-dark);
    min-width: 80px;
    flex-shrink: 0;
    padding-top: 1px;
    font-family: 'SF Mono', 'Monaco', 'Menlo', 'Consolas', monospace;
    cursor: default;
    border-radius: 3px;
    transition: background 0.15s;
}

.sp-field-key[contenteditable="true"] {
    outline: none;
    background: #fff;
    border: 1px solid var(--warning);
    padding: 0 3px;
    box-shadow: 0 0 0 2px rgba(230, 162, 60, 0.12);
    user-select: text;
}

.sp-field-value {
    flex: 1;
    font-size: 12px;
    line-height: 1.5;
    color: var(--text);
    word-break: break-word;
    cursor: default;
    min-height: 18px;
    border-radius: 3px;
    transition: background 0.15s;
}

.sp-field-value[contenteditable="true"] {
    outline: none;
    background: #fff;
    border: 1px solid var(--primary);
    border-radius: 3px;
    padding: 1px 4px;
    box-shadow: 0 0 0 2px var(--primary-ring);
}

.sp-field-actions {
    display: none;
    gap: 2px;
    flex-shrink: 0;
    align-items: center;
}

.sp-field:hover .sp-field-actions {
    display: flex;
}

.sp-field-btn {
    width: 20px;
    height: 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: var(--transition);
    padding: 0;
}

.sp-field-btn:hover {
    background: var(--danger-light);
    color: var(--danger);
}

.sp-field-btn.edit-btn:hover,
.sp-field-btn.sp-elem-add-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* Dict field (nested) */
.sp-dict-block {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.sp-dict-row {
    display: flex;
    gap: 6px;
    padding: 2px 0;
    align-items: flex-start;
}

.sp-dict-key {
    font-size: 11px;
    color: var(--text-secondary);
    min-width: 70px;
    flex-shrink: 0;
    font-family: 'SF Mono', 'Monaco', 'Menlo', 'Consolas', monospace;
    cursor: default;
    border-radius: 3px;
}

.sp-dict-key[contenteditable="true"] {
    outline: none;
    background: #fff;
    border: 1px solid var(--warning);
    padding: 0 3px;
    box-shadow: 0 0 0 2px rgba(230, 162, 60, 0.12);
}

.sp-dict-value {
    flex: 1;
    font-size: 12px;
    color: var(--text);
    word-break: break-word;
    cursor: default;
    border-radius: 3px;
}

.sp-dict-value[contenteditable="true"] {
    outline: none;
    background: #fff;
    border: 1px solid var(--primary);
    border-radius: 3px;
    padding: 0 4px;
    box-shadow: 0 0 0 2px var(--primary-ring);
}

/* Element card */
.sp-element {
    border: 1px solid var(--border-light);
    border-radius: 6px;
    margin-bottom: 5px;
    overflow: hidden;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.sp-element:last-child {
    margin-bottom: 0;
}

.sp-element:hover {
    border-color: var(--border);
}

.sp-element.highlight {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-ring);
}

.sp-element-header {
    display: flex;
    align-items: center;
    padding: 5px 8px;
    gap: 6px;
    cursor: pointer;
    user-select: none;
    transition: background 0.15s;
}

.sp-element-header:hover {
    background: #f5f7fa;
}

.sp-element-color {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.sp-element-id {
    font-size: 11px;
    font-weight: 700;
    color: var(--text-secondary);
    font-family: monospace;
    flex-shrink: 0;
}

.sp-element-caption {
    flex: 1;
    font-size: 12px;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 500;
}

.sp-element-actions {
    display: none;
    gap: 2px;
}

.sp-element-header:hover .sp-element-actions {
    display: flex;
}

.sp-element-body {
    padding: 2px 8px 6px;
    border-top: 1px solid var(--border-light);
}

.sp-element.collapsed .sp-element-body {
    display: none;
}

/* Position badge (bbox) */
.sp-pos-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: var(--info-light);
    padding: 1px 6px;
    border-radius: 3px;
    font-family: monospace;
    font-size: 11px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.sp-pos-badge:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.sp-pos-badge .pos-icon {
    font-size: 10px;
}

.sp-bbox-edit-btn {
    margin-left: 4px;
    padding: 0 4px;
    font-size: 11px;
    line-height: 18px;
    vertical-align: middle;
    border-radius: 3px;
    cursor: pointer;
    border: 1px solid transparent;
    background: transparent;
    opacity: 0.5;
    transition: var(--transition);
}

.sp-bbox-edit-btn:hover {
    opacity: 1;
    background: var(--primary-light);
    border-color: var(--primary);
}

/* Relationship list */
.sp-rel-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sp-rel-item {
    display: flex;
    align-items: flex-start;
    gap: 6px;
    padding: 3px 6px;
    border-radius: 4px;
    transition: background 0.15s;
    font-size: 12px;
    color: var(--text);
}

.sp-rel-item:hover {
    background: #f5f7fa;
}

.sp-rel-bullet {
    color: var(--text-placeholder);
    flex-shrink: 0;
}

.sp-rel-text {
    flex: 1;
    word-break: break-word;
    cursor: default;
    border-radius: 3px;
}

/* Active state for raw toggle button */
.tool-btn.active {
    background: var(--primary-light);
    color: var(--primary);
}

/* ==================== Params Bar ==================== */
.params-bar {
    display: flex;
    align-items: center;
    padding: 0 12px;
    gap: 10px;
    min-height: 46px;
    flex-wrap: wrap;
}

.params-label {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--text-secondary);
    white-space: nowrap;
    user-select: none;
    letter-spacing: 0.7px;
    text-transform: uppercase;
}

.params-separator {
    width: 1px;
    height: 20px;
    background: var(--border);
    flex-shrink: 0;
}

.params-spacer {
    flex: 1;
}

.params-group {
    display: flex;
    align-items: center;
    gap: 4px;
}

.params-group label {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    user-select: none;
}

.params-group input[type="number"] {
    width: 66px;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0 6px;
    font-size: 12px;
    color: var(--text);
    background: var(--panel-bg);
    text-align: center;
    outline: none;
    transition: var(--transition);
    font-variant-numeric: tabular-nums;
}

.params-group input[type="number"]:hover:not(:disabled) {
    border-color: var(--border-hover);
}

.params-group input[type="number"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-ring);
}

.params-group input[type="number"]:disabled {
    background: var(--bg);
    color: var(--text-placeholder);
    cursor: not-allowed;
}

.params-group select {
    height: 26px;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0 4px;
    font-size: 12px;
    color: var(--text);
    background: var(--panel-bg);
    outline: none;
    cursor: pointer;
    transition: var(--transition);
}

.params-group select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-ring);
}

.params-checkbox {
    gap: 3px !important;
}

.params-checkbox input[type="checkbox"] {
    width: 14px;
    height: 14px;
    cursor: pointer;
    accent-color: var(--primary);
}

/* ==================== Prompt Bar ==================== */
.prompt-bar {
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 12px;
    min-height: 50px;
}

.prompt-label {
    font-size: 11.5px;
    font-weight: 700;
    color: var(--text-secondary);
    white-space: nowrap;
    user-select: none;
    flex-shrink: 0;
    letter-spacing: 0.7px;
    text-transform: uppercase;
}

.prompt-bar textarea {
    flex: 1;
    border: none;
    outline: none;
    resize: none;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text);
    background: transparent;
    height: 32px;
    font-family: inherit;
    padding: 4px 0;
}

.prompt-bar textarea::placeholder {
    color: var(--text-placeholder);
}

/* ==================== Action Buttons ==================== */
.action-btn {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xs);
    user-select: none;
    background: var(--panel-bg);
    color: var(--text);
    letter-spacing: 0.15px;
}

.action-btn:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
    border-color: var(--primary);
    color: var(--primary);
}

.action-btn:active:not(:disabled) {
    transform: translateY(0);
    box-shadow: var(--shadow-xs);
}

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

/* Secondary action — Generate SP */
.gen-sp-btn {
    min-height: 46px;
    font-size: 14px;
}

/* Primary action — the CTA */
.gen-image-btn {
    min-height: 52px;
    font-size: 14.5px;
    font-weight: 600;
    background: var(--primary-gradient);
    color: #ffffff;
    border: 1px solid transparent;
    box-shadow: var(--shadow-primary);
}

.gen-image-btn:hover:not(:disabled) {
    color: #ffffff;
    border-color: transparent;
    filter: brightness(1.06);
    box-shadow: 0 6px 22px rgba(99, 102, 241, 0.32);
    transform: translateY(-1px);
}

.gen-image-btn:active:not(:disabled) {
    filter: brightness(0.98);
    box-shadow: var(--shadow-primary);
}

.gen-sp-btn.loading,
.gen-image-btn.loading {
    pointer-events: none;
    opacity: 0.75;
}

/* ==================== Modals ==================== */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.55);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(2px);
}

.modal-overlay.visible {
    display: flex;
}

.modal-close-btn {
    position: fixed;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255, 255, 255, 0.92);
    color: #333;
    border-radius: 50%;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1001;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.modal-close-btn:hover {
    background: white;
    transform: scale(1.1);
}

.modal-close-btn-sm {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.modal-close-btn-sm:hover {
    background: var(--bg);
    color: var(--text);
}

/* ==================== Diff Dialog ==================== */
.diff-dialog {
    background: var(--panel-bg);
    border-radius: var(--radius-lg);
    width: 80%;
    max-width: 800px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.diff-header {
    padding: 16px 20px;
    font-weight: 600;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.diff-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px 20px;
}

.diff-section-title {
    font-weight: 600;
    font-size: 13px;
    color: var(--text);
    margin-bottom: 8px;
}

.diff-block {
    font-family: 'SF Mono', 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 12px;
    line-height: 1.6;
    margin-bottom: 20px;
    border: 1px solid var(--border-light);
    border-radius: 6px;
    overflow: hidden;
}

.diff-line {
    padding: 1px 10px;
    white-space: pre-wrap;
    word-break: break-word;
}

.diff-line.diff-added {
    background: #e6ffed;
    color: #22863a;
}

.diff-line.diff-removed {
    background: #ffeef0;
    color: #cb2431;
}

.diff-line.diff-same {
    color: var(--text-secondary);
}

.diff-no-change {
    color: var(--text-placeholder);
    font-size: 13px;
    padding: 8px 0;
}

.diff-actions {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    flex-shrink: 0;
}

.cancel-btn {
    padding: 8px 20px;
    background: var(--panel-bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
}

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

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

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

/* ==================== History Detail Modal ==================== */
.history-detail {
    background: var(--panel-bg);
    border-radius: var(--radius-lg);
    width: 60%;
    max-width: 640px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.history-detail-header {
    padding: 16px 20px;
    font-weight: 600;
    font-size: 15px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
}

.history-detail-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.history-detail-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    flex-shrink: 0;
    gap: 8px;
    flex-wrap: wrap;
}

.restore-part-btn {
    padding: 6px 14px;
    background: var(--panel-bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

.restore-part-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.restore-btn {
    padding: 6px 20px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

.detail-section {
    margin-bottom: 16px;
}

.detail-section:last-child {
    margin-bottom: 0;
}

.detail-section-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.detail-section-content {
    font-size: 13px;
    line-height: 1.6;
    color: var(--text);
    white-space: pre-wrap;
    word-break: break-word;
    background: var(--bg);
    padding: 10px 12px;
    border-radius: 6px;
    max-height: 200px;
    overflow-y: auto;
    border: 1px solid var(--border-light);
}

.detail-section-content.mono {
    font-family: 'SF Mono', 'Monaco', 'Menlo', 'Consolas', monospace;
    font-size: 11px;
}

.detail-image {
    max-width: 100%;
    max-height: 200px;
    border-radius: 6px;
    border: 1px solid var(--border);
}

/* ==================== Toast ==================== */
.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column-reverse;
    gap: 8px;
    pointer-events: none;
}

.toast {
    padding: 10px 18px;
    border-radius: var(--radius);
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    animation: toast-in 0.3s ease;
    max-width: 380px;
    word-break: break-word;
    pointer-events: auto;
}

.toast.toast-info {
    background: #edf2fc;
    color: #606266;
    border: 1px solid #d9ecff;
}

.toast.toast-success {
    background: #f0f9eb;
    color: #529b2e;
    border: 1px solid #e1f3d8;
}

.toast.toast-warning {
    background: #fdf6ec;
    color: #b88230;
    border: 1px solid #faecd8;
}

.toast.toast-error {
    background: #fef0f0;
    color: #c45656;
    border: 1px solid #fde2e2;
}

@keyframes toast-in {
    from { opacity: 0; transform: translateX(24px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes toast-out {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(24px); }
}

/* ==================== Add Field Dropdown ==================== */
.sp-add-dropdown {
    position: fixed;
    z-index: 3000;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: var(--shadow-lg);
    padding: 4px;
    min-width: 140px;
}

.sp-add-option {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 12px;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.sp-add-option:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* Inline add buttons (in dict blocks / element bodies) */
.sp-inline-add-btn {
    border: 1px dashed var(--border);
    background: transparent;
    color: var(--text-placeholder);
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    padding: 2px 8px;
    transition: var(--transition);
}

.sp-inline-add-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.sp-dict-add-row {
    padding: 2px 0;
}

.sp-elem-add-row {
    padding: 4px 0;
    text-align: center;
}

/* Dict sub-key delete */
.sp-dict-del {
    width: 16px;
    height: 16px;
    border: none;
    background: transparent;
    color: transparent;
    border-radius: 3px;
    cursor: pointer;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: var(--transition);
    padding: 0;
}

.sp-dict-row:hover .sp-dict-del {
    color: var(--text-secondary);
}

.sp-dict-del:hover {
    background: var(--danger-light);
    color: var(--danger);
}

/* ==================== Modal Image Zoom ==================== */
.modal-image-container {
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 92vw;
    max-height: 92vh;
    overflow: hidden;
}

.modal-image {
    max-width: 92vw;
    max-height: 92vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.3);
    transition: none;
    transform-origin: center center;
    user-select: none;
    -webkit-user-drag: none;
}

/* ==================== Loading Spinner ==================== */
.spinner {
    display: inline-block;
    width: 14px;
    height: 14px;
    border: 2px solid rgba(0, 0, 0, 0.12);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 0.8s linear infinite;
    margin-right: 6px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== Scrollbar ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* ==================== Selection ==================== */
::selection {
    background: rgba(99, 102, 241, 0.22);
}

/* ==================== Responsive ==================== */
@media (max-width: 900px) {
    .workspace {
        grid-template-columns: 1fr;
        grid-template-rows: 1fr 1fr auto auto auto auto;
    }

    .image-panel  { grid-row: 1; grid-column: 1; min-height: 250px; }
    .sp-panel     { grid-row: 2; grid-column: 1; min-height: 200px; }
    .params-bar   { grid-row: 3; grid-column: 1; }
    .gen-sp-btn   { grid-row: 4; grid-column: 1; }
    .prompt-bar   { grid-row: 5; grid-column: 1; }
    .gen-image-btn { grid-row: 6; grid-column: 1; }

    .right-col {
        max-width: none;
    }

    .params-bar {
        flex-wrap: wrap;
        gap: 8px;
    }

    .history-detail,
    .diff-dialog {
        width: 95%;
    }
}

/* ==================== Floating Input Popup ==================== */
.sp-input-popup {
    position: fixed;
    z-index: 3000;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
    padding: 12px;
    min-width: 240px;
    max-width: 320px;
    animation: popup-in 0.15s ease;
}

@keyframes popup-in {
    from { opacity: 0; transform: translateY(-4px); }
    to   { opacity: 1; transform: translateY(0); }
}

.sp-input-popup .popup-title {
    font-size: 12px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border-light);
}

.sp-input-popup .popup-field {
    margin-bottom: 8px;
}

.sp-input-popup .popup-field label {
    display: block;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 3px;
}

.sp-input-popup .popup-field input {
    width: 100%;
    height: 28px;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0 8px;
    font-size: 12px;
    color: var(--text);
    background: var(--panel-bg);
    outline: none;
    transition: var(--transition);
}

.sp-input-popup .popup-field input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-ring);
}

.sp-input-popup .popup-field input.input-error {
    border-color: var(--danger);
    box-shadow: 0 0 0 2px rgba(245, 108, 108, 0.12);
}

.sp-input-popup .popup-actions {
    display: flex;
    justify-content: flex-end;
    gap: 6px;
    margin-top: 10px;
    padding-top: 8px;
    border-top: 1px solid var(--border-light);
}

.sp-input-popup .popup-btn {
    height: 26px;
    padding: 0 14px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid var(--border);
    background: var(--panel-bg);
    color: var(--text);
    transition: var(--transition);
}

.sp-input-popup .popup-btn:hover {
    border-color: var(--text-secondary);
    color: var(--text);
}

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

.sp-input-popup .popup-btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
}