:root {
  --bg-app: #F7F6F2;
  --bg-panel: #FFFFFF;
  --bg-card: #F2F1ED;
  --bg-hover: #E8E6DF;
  --border-subtle: #E2E0D8;
  --border-focus: #141413;
  --text-main: #141413;
  --text-sub: #575652;
  --text-muted: #8C8A84;
  --accent: #141413;
  --accent-hover: #2C2C2A;
  --ai-accent: #141413;
  --ai-accent-hover: #2C2C2A;
  --success: #15803D;
  --warning: #B45309;
  --danger: #B91C1C;
  --font-sans: "Pretendard", -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
  --font-display: "Georgia", "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  background: var(--bg-app);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 13px;
  overflow: hidden;
  user-select: none;
  -webkit-font-smoothing: antialiased;
}

button, input, select, textarea {
  font: inherit;
  color: inherit;
}

/* ── 전체 쉘: 화면 크기에 100% 고정 ──────── */
.studio-shell {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg-app);
}

/* ── 통합 상단 바 ── */
.studio-topbar {
  flex: 0 0 52px;
  height: 52px;
  min-height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 0 16px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-subtle);
  overflow-x: auto;
  overflow-y: hidden;
  scrollbar-width: none;
}
.studio-topbar::-webkit-scrollbar {
  display: none;
}

.topbar-left, .topbar-center, .topbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
  white-space: nowrap;
}

.brand-badge {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 6px 4px 2px;
  text-decoration: none;
  color: var(--text-main);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand-mark {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.14em;
  color: var(--text-main);
}
.brand-sub {
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}

.workspace-nav {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  padding: 2px;
  gap: 2px;
  margin-left: 4px;
  flex-shrink: 0;
}
.workspace-link {
  padding: 5px 11px;
  border-radius: 5px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-sub);
  text-decoration: none;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.workspace-link:hover {
  color: var(--text-main);
}
.workspace-link.active {
  background: var(--accent);
  color: #FFFFFF;
}

.active-property-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  max-width: 220px;
  overflow: hidden;
  white-space: nowrap;
  flex-shrink: 0;
}
.active-property-chip strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-main);
}

.muted-text {
  color: var(--text-muted);
  font-size: 11px;
  white-space: nowrap;
}

.topbar-divider {
  width: 1px;
  height: 18px;
  background: var(--border-subtle);
  margin: 0 3px;
  flex-shrink: 0;
}

.zoom-pill-group {
  display: inline-flex;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 2px;
  gap: 2px;
  flex-shrink: 0;
}

.zoom-btn {
  padding: 4px 8px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-sub);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
.zoom-btn.active {
  background: var(--accent);
  color: #FFFFFF;
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 11.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.tool-btn:hover:not(:disabled) {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: #C8C5BC;
}
.tool-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #FFFFFF;
}
.tool-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
}

.primary-btn, .secondary-btn {
  padding: 6px 12px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.primary-btn {
  background: var(--accent);
  color: #FFFFFF;
}
.primary-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}
.secondary-btn {
  background: var(--bg-panel);
  border-color: var(--border-subtle);
  color: var(--text-main);
}
.secondary-btn:hover:not(:disabled) {
  background: var(--bg-card);
  border-color: #C8C5BC;
}
.primary-btn:disabled, .secondary-btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}
.small-btn {
  padding: 4px 8px;
  font-size: 11px;
}
.full-width {
  width: 100%;
}

/* ── 본문 3단 Flexbox ───────────────────────── */
.studio-body {
  flex: 1 1 0;
  min-height: 0;
  width: 100%;
  display: flex;
  flex-direction: row;
  overflow: hidden;
}
.studio-body.left-collapsed .studio-left {
  display: none !important;
}

/* ── 1. 좌측 패널 (프로젝트 폴더 전용) ─────────────────────────── */
.studio-left {
  flex: 0 0 264px;
  width: 264px;
  height: 100%;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border-right: 1px solid var(--border-subtle);
  overflow: hidden;
}

.left-section-header {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border-subtle);
}
.left-section-header.compact {
  flex-direction: row;
  align-items: center;
  justify-content: space-between;
  padding: 8px 12px;
}

.left-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.left-section-header h2 {
  margin: 0;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--text-main);
  white-space: nowrap;
}

.left-header-actions {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.new-upload-btn {
  padding: 5px 10px;
  border-radius: 5px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.15s;
}
.new-upload-btn:hover {
  background: var(--accent-hover);
}

.icon-collapse-btn {
  width: 24px;
  height: 24px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 13px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.icon-collapse-btn:hover {
  color: var(--text-main);
  background: var(--bg-card);
}

.project-org-toolbar {
  display: flex;
  gap: 5px;
}

.org-btn {
  flex: 1;
  padding: 5px 7px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-sub);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  text-align: center;
  transition: all 0.15s;
}
.org-btn:hover {
  background: var(--bg-hover);
  color: var(--text-main);
}
.org-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #FFFFFF;
}

.merge-action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
  padding: 6px 8px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--accent);
}
.merge-count-text {
  font-size: 11px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}
.merge-action-btns {
  display: flex;
  gap: 4px;
}

.mini-action-btn {
  padding: 3px 8px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 10.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.mini-action-btn:hover {
  background: var(--bg-card);
  color: var(--text-main);
}

/* 업로드 드로어 */
.upload-drawer {
  flex: 0 0 auto;
  padding: 12px 14px;
  background: var(--bg-app);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.upload-drawer[hidden] {
  display: none !important;
}
.upload-drawer-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
}
.text-close-btn {
  background: none;
  border: none;
  color: var(--text-sub);
  cursor: pointer;
  font-size: 11.5px;
  white-space: nowrap;
}
.text-close-btn:hover {
  color: var(--text-main);
}
.field-label {
  font-size: 11px;
  color: var(--text-sub);
  font-weight: 600;
}
.text-input, .select-input {
  width: 100%;
  padding: 7px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-main);
  font-size: 12px;
  outline: none;
}
.text-input:focus, .select-input:focus {
  border-color: var(--accent);
}
.upload-dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 14px 10px;
  border: 1px dashed #B8B5AC;
  border-radius: 6px;
  background: var(--bg-panel);
  cursor: pointer;
  text-align: center;
  transition: border-color 0.15s;
}
.upload-dropzone:hover {
  border-color: var(--accent);
}
.dropzone-title {
  font-weight: 600;
  color: var(--text-main);
  font-size: 11.5px;
}
.dropzone-sub {
  font-size: 10.5px;
  color: var(--text-muted);
}
.hdr-check {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 11px;
  color: var(--text-sub);
  cursor: pointer;
}
.upload-status {
  margin: 0;
  font-size: 11px;
  color: var(--text-main);
  font-weight: 600;
}
.auto-batch-details {
  margin-top: 2px;
  padding-top: 6px;
  border-top: 1px solid var(--border-subtle);
  font-size: 11px;
  color: var(--text-sub);
}
.auto-batch-details > summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-sub);
  padding: 2px 0;
}
.auto-batch-body {
  margin-top: 6px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

/* 프로젝트 리스트 */
.property-list {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  padding: 8px 10px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.property-item {
  width: 100%;
  text-align: left;
  padding: 9px 11px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex-shrink: 0;
  transition: all 0.15s ease;
}
.property-item:hover {
  background: var(--bg-card);
  border-color: #C8C5BC;
}
.property-item.active {
  border-color: var(--accent);
  background: var(--bg-card);
  box-shadow: inset 3px 0 0 var(--accent);
}

.property-item-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
  min-width: 0;
}

.property-name-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  flex: 1;
}

.property-merge-check {
  width: 14px;
  height: 14px;
  accent-color: var(--accent);
  flex-shrink: 0;
  cursor: pointer;
}

.property-name {
  font-weight: 600;
  font-size: 12px;
  color: var(--text-main);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.property-right-badges {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-shrink: 0;
}

.property-rename-btn {
  padding: 2px 5px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 10.5px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
}
.property-rename-btn:hover {
  color: var(--text-main);
  background: var(--bg-hover);
}

.property-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 10.5px;
  padding: 2px 7px;
  border-radius: 999px;
  background: var(--bg-hover);
  color: var(--text-main);
  font-weight: 600;
  white-space: nowrap;
  flex-shrink: 0;
}

.property-meta {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 10.5px;
  color: var(--text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  display: inline-block;
  flex-shrink: 0;
}
.badge-dot.ready { background: var(--success); }
.badge-dot.busy { background: var(--accent); }
.badge-dot.warn { background: var(--warning); }

/* 좌측 하단 프리셋 & 동기화 */
.left-presets-box {
  flex: 0 0 auto;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-app);
  padding-bottom: 10px;
}

.preset-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 6px 12px;
  max-height: 86px;
  overflow-y: auto;
}
.preset-chip {
  padding: 4px 8px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 10.5px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.preset-chip:hover {
  border-color: var(--accent);
  color: var(--text-main);
}

.sync-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px 12px 0;
}
.sync-btn {
  padding: 6px 6px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-main);
  font-size: 10.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.sync-btn:hover:not(:disabled) {
  background: var(--bg-hover);
}
.sync-btn.accent {
  grid-column: span 2;
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}
.sync-btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}

/* ── 2. 중앙 뷰어 + 하단 사진 필름스트립 ── */
.studio-center {
  flex: 1 1 0;
  min-width: 0;
  min-height: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: #ECEAE3;
  overflow: hidden;
  position: relative;
}

.floating-panel-btn {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 25;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.94);
  color: var(--text-main);
  font-weight: 600;
  font-size: 11.5px;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 4px 12px rgba(20, 20, 19, 0.08);
}

.notice-banner {
  flex: 0 0 auto;
  padding: 7px 16px;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 12px;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.notice-banner[hidden] {
  display: none !important;
}

.viewer-stage {
  flex: 1 1 0;
  min-height: 0;
  min-width: 0;
  width: 100%;
  container-type: size;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 16px;
}

.viewer-empty {
  text-align: center;
  max-width: 360px;
  color: var(--text-sub);
}
.empty-icon {
  color: var(--text-muted);
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
}
.empty-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 6px;
}
.empty-desc {
  margin: 0;
  line-height: 1.5;
  font-size: 12px;
  color: var(--text-muted);
}

.media-frame {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  max-width: calc(100cqw - 28px);
  max-height: calc(100cqh - 28px);
  box-shadow: 0 20px 50px rgba(20, 20, 19, 0.14);
  border-radius: 4px;
  overflow: hidden;
  transform-origin: center center;
  background: #FFFFFF;
}
.media-frame[hidden] {
  display: none !important;
}

.media-frame > img#main-photo,
.media-frame > canvas#draft-canvas {
  display: block;
  max-width: calc(100cqw - 28px);
  max-height: calc(100cqh - 28px);
  width: auto;
  height: auto;
  object-fit: contain;
}
.media-frame > img#main-photo[hidden],
.media-frame > canvas#draft-canvas[hidden] {
  display: none !important;
}

/* 반반 비교 오버레이 */
.split-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 11;
}
.split-overlay[hidden] {
  display: none !important;
}
.split-before-wrap {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.split-before-wrap img {
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  object-fit: contain;
}
.split-tag {
  position: absolute;
  bottom: 10px;
  padding: 4px 9px;
  border-radius: 4px;
  background: rgba(20, 20, 19, 0.82);
  color: #FFFFFF;
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.08em;
  pointer-events: none;
}
.split-tag.before { left: 10px; }
.split-tag.after { right: 10px; }

.split-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 1.5px;
  background: #FFFFFF;
  box-shadow: 0 0 6px rgba(0, 0, 0, 0.35);
  cursor: ew-resize;
  z-index: 12;
  pointer-events: auto;
}
.split-handle {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #FFFFFF;
  color: #FFFFFF;
  font-size: 11px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25);
}

/* 격자 & 수평자 */
.grid-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.45) 1px, transparent 1px);
  background-size: 25% 25%;
  border: 1px solid rgba(255, 255, 255, 0.5);
}

.straighten-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: crosshair;
  z-index: 15;
}

.stage-floating-hint {
  position: absolute;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(20, 20, 19, 0.88);
  color: #FFFFFF;
  font-size: 11.5px;
  font-weight: 500;
  white-space: nowrap;
  pointer-events: none;
  z-index: 16;
}

/* 마우스 드래그 자르기 오버레이 */
.crop-overlay {
  position: absolute;
  inset: 0;
  z-index: 14;
}
.crop-box {
  position: absolute;
  border: 1.5px solid #FFFFFF;
  box-shadow: 0 0 0 9999px rgba(20, 20, 19, 0.55);
  cursor: move;
}
.crop-handle {
  position: absolute;
  width: 10px;
  height: 10px;
  background: #FFFFFF;
  border: 1.5px solid var(--accent);
}
.crop-handle.nw { left: -5px; top: -5px; cursor: nwse-resize; }
.crop-handle.ne { right: -5px; top: -5px; cursor: nesw-resize; }
.crop-handle.sw { left: -5px; bottom: -5px; cursor: nesw-resize; }
.crop-handle.se { right: -5px; bottom: -5px; cursor: nwse-resize; }

/* 좌우 네비게이션 버튼 */
.stage-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border-subtle);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text-main);
  font-size: 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(20, 20, 19, 0.1);
}
.stage-nav-btn:hover {
  background: var(--accent);
  color: #FFFFFF;
  border-color: var(--accent);
}
.stage-nav-btn.prev { left: 14px; }
.stage-nav-btn.next { right: 14px; }

.stage-badges {
  position: absolute;
  top: 12px;
  right: 14px;
  display: flex;
  gap: 6px;
  pointer-events: none;
}
.stage-badge {
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-size: 11px;
  font-weight: 600;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(20, 20, 19, 0.06);
}
.stage-badge.counter { color: var(--text-sub); }
.stage-badge.warn {
  background: #FEF3C7;
  border-color: #F59E0B;
  color: #92400E;
}

/* ── 하단 필름스트립 ── */
.filmstrip-bar {
  flex: 0 0 140px;
  height: 140px;
  min-height: 0;
  background: var(--bg-panel);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.studio-center.bottom-collapsed .filmstrip-bar {
  flex: 0 0 36px;
  height: 36px;
}
.studio-center.bottom-collapsed #filmstrip-list {
  display: none !important;
}

.filmstrip-toolbar {
  flex: 0 0 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--border-subtle);
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}
.filmstrip-toolbar::-webkit-scrollbar {
  display: none;
}

.filmstrip-left-controls, .filmstrip-right-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  flex-shrink: 0;
}

.filmstrip-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px 8px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 11.5px;
  cursor: pointer;
  white-space: nowrap;
}
.filmstrip-toggle-btn:hover {
  background: var(--bg-hover);
}

.filmstrip-filters {
  display: flex;
  gap: 4px;
}
.filter-chip {
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-sub);
  font-size: 11px;
  cursor: pointer;
  white-space: nowrap;
}
.filter-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
  font-weight: 600;
}

.photo-split-action-bar {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 2px 8px;
  border-radius: 5px;
  background: var(--bg-card);
  border: 1px solid var(--accent);
}
.photo-split-action-bar[hidden] {
  display: none !important;
}

.shortcut-hint {
  font-size: 10.5px;
  color: var(--text-muted);
  white-space: nowrap;
}

.filmstrip-list {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  overflow-x: auto;
  overflow-y: hidden;
  background: var(--bg-app);
}

.thumb-card {
  flex: 0 0 112px;
  height: 90px;
  border-radius: 6px;
  border: 1.5px solid var(--border-subtle);
  background: var(--bg-panel);
  padding: 0;
  overflow: hidden;
  cursor: pointer;
  position: relative;
  display: flex;
  flex-direction: column;
  transition: all 0.15s ease;
}
.thumb-card.active {
  border-color: var(--accent);
  box-shadow: 0 0 0 1.5px var(--accent);
}
.thumb-card.split-selected {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(20, 20, 19, 0.25);
}
.thumb-card img {
  width: 100%;
  height: 65px;
  object-fit: cover;
  display: block;
}
.thumb-select-badge {
  position: absolute;
  top: 4px;
  left: 4px;
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.92);
  border: 1.5px solid var(--text-sub);
  color: var(--text-main);
  font-size: 11px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 4;
}
.thumb-card.split-selected .thumb-select-badge {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}
.thumb-ai-badge {
  position: absolute;
  top: 4px;
  right: 4px;
  padding: 1px 5px;
  border-radius: 3px;
  background: var(--accent);
  color: #FFFFFF;
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.04em;
}
.thumb-caption {
  height: 22px;
  padding: 0 6px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 10px;
  background: var(--bg-panel);
  border-top: 1px solid var(--border-subtle);
  white-space: nowrap;
}
.thumb-index {
  font-weight: 600;
  color: var(--text-main);
}
.thumb-state {
  font-size: 9.5px;
  padding: 1px 4px;
  border-radius: 3px;
  white-space: nowrap;
}
.thumb-state.auto { color: var(--text-muted); }
.thumb-state.dirty { background: #FEF3C7; color: #92400E; font-weight: 600; }
.thumb-state.busy { background: var(--bg-card); color: var(--text-main); }
.thumb-state.saved { background: #DCFCE7; color: #166534; font-weight: 600; }

.pending-card {
  border: 1px dashed #B8B5AC;
  background: var(--bg-panel);
  align-items: center;
  justify-content: center;
  gap: 4px;
  padding: 6px;
  text-align: center;
  cursor: default;
}
.pending-card-title {
  font-size: 10.5px;
  font-weight: 600;
  color: var(--text-main);
}
.pending-card-sub {
  font-size: 9.5px;
  color: var(--text-muted);
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ── 3. 우측 패널 ([현상 컨트롤] ↔ [AI 공간 편집]) ────────────── */
.studio-right {
  flex: 0 0 360px;
  width: 360px;
  height: 100%;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-panel);
  border-left: 1px solid var(--border-subtle);
  overflow: hidden;
}

.right-mode-switcher {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 8px 12px;
  background: var(--bg-app);
  border-bottom: 1px solid var(--border-subtle);
}

.right-mode-tab {
  padding: 7px 8px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}
.right-mode-tab:hover {
  color: var(--text-main);
}
.right-mode-tab.active,
.right-mode-tab.ai-tab.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.right-panel-header {
  flex: 0 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  gap: 8px;
}
.right-panel-header h2 {
  margin: 0 0 2px;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}
.right-panel-header p {
  margin: 0;
}

.status-pill {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 10.5px;
  font-weight: 600;
  background: var(--bg-card);
  color: var(--text-sub);
  border: 1px solid var(--border-subtle);
  white-space: nowrap;
  flex-shrink: 0;
}
.status-pill.dirty { background: #FEF3C7; border-color: #FDE68A; color: #92400E; }
.status-pill.busy { background: var(--accent); border-color: var(--accent); color: #FFFFFF; }
.status-pill.saved { background: #DCFCE7; border-color: #BBF7D0; color: #166534; }

.right-mode-pane {
  flex: 1 1 0;
  min-height: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.right-mode-pane[hidden] {
  display: none !important;
}

/* 실시간 RGB 히스토그램 */
.histogram-box {
  flex: 0 0 auto;
  padding: 8px 14px 10px;
  background: var(--bg-app);
  border-bottom: 1px solid var(--border-subtle);
}
.histogram-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 5px;
  font-size: 10.5px;
  color: var(--text-sub);
  white-space: nowrap;
}
.clipping-indicators {
  display: flex;
  align-items: center;
  gap: 5px;
}
.clip-dot {
  font-size: 10px;
  padding: 1px 5px;
  border-radius: 4px;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}
.clip-dot.warn-shadow { background: #E0F2FE; border-color: #BAE6FD; color: #0369A1; }
.clip-dot.warn-highlight { background: #FEE2E2; border-color: #FECACA; color: #B91C1C; }
.luma-badge { font-size: 10px; color: var(--text-main); font-weight: 600; }
#histogram-canvas {
  width: 100%;
  height: 58px;
  display: block;
  border-radius: 5px;
  background: #181817;
  border: 1px solid var(--border-subtle);
}

.controls-fieldset {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  border: none;
  margin: 0;
  padding: 0;
}
.controls-fieldset:disabled {
  opacity: 0.45;
}

.control-group {
  border-bottom: 1px solid var(--border-subtle);
}
.control-group-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  font-weight: 700;
  font-size: 12px;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  white-space: nowrap;
}
.control-group-title::-webkit-details-marker {
  display: none;
}

.group-reset-btn {
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 10.5px;
  cursor: pointer;
  white-space: nowrap;
}
.group-reset-btn:hover {
  background: var(--bg-card);
  color: var(--text-main);
}

.control-group-body {
  padding: 4px 14px 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* 라이트룸 정밀 컨트롤 */
.lr-control {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.lr-control-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 6px;
}
.lr-control-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--text-main);
  cursor: pointer;
  white-space: nowrap;
}
.lr-stepper-group {
  display: inline-flex;
  align-items: center;
  gap: 3px;
  flex-shrink: 0;
}
.step-btn {
  width: 21px;
  height: 21px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-main);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.step-btn:hover:not(:disabled) {
  background: var(--bg-card);
  border-color: var(--accent);
}
.lr-number-wrap {
  position: relative;
  display: inline-flex;
  align-items: center;
}
.lr-number-input {
  width: 50px;
  height: 21px;
  padding: 0 5px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 11px;
  font-weight: 600;
  text-align: right;
  font-variant-numeric: tabular-nums;
  -moz-appearance: textfield;
}
.lr-number-input::-webkit-outer-spin-button,
.lr-number-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
.lr-unit {
  font-size: 10px;
  color: var(--text-muted);
  margin-left: 2px;
}
.item-reset-btn {
  width: 21px;
  height: 21px;
  border-radius: 4px;
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-muted);
  font-size: 11.5px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  opacity: 0.35;
}
.item-reset-btn.active {
  opacity: 1;
  color: var(--text-main);
  background: var(--bg-card);
  border-color: var(--border-subtle);
}

.lr-range {
  width: 100%;
  height: 4px;
  border-radius: 999px;
  appearance: none;
  background: #DCDAD2;
  outline: none;
  cursor: pointer;
}
.lr-range[data-track="warmth"] {
  background: linear-gradient(90deg, #93C5FD 0%, #E5E4DF 50%, #FCD34D 100%);
}
.lr-range[data-track="tint"] {
  background: linear-gradient(90deg, #86EFAC 0%, #E5E4DF 50%, #F9A8D4 100%);
}
.lr-range[data-track="brightness"] {
  background: linear-gradient(90deg, #575652 0%, #CFCBC2 50%, #F7F6F2 100%);
}
.lr-range::-webkit-slider-thumb {
  appearance: none;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #FFFFFF;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

.lr-ends {
  display: flex;
  justify-content: space-between;
  font-size: 9.5px;
  color: var(--text-muted);
}

/* 톤 커브 & HSL */
.tone-curve-widget {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 6px;
}
#tone-curve-canvas {
  width: 100%;
  height: 165px;
  border-radius: 6px;
  background: #181817;
  border: 1px solid var(--border-subtle);
  cursor: crosshair;
  display: block;
}
.curve-preset-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}
.curve-preset-btn {
  padding: 5px 4px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 10px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.curve-preset-btn.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #FFFFFF;
}

.control-group-sub {
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.hsl-mode-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3px;
  background: var(--bg-card);
  padding: 3px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
}
.hsl-tab {
  padding: 5px 4px;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: var(--text-sub);
  font-size: 10.5px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
}
.hsl-tab.active {
  background: var(--accent);
  color: #FFFFFF;
}
.hsl-swatch {
  display: inline-block;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  margin-right: 5px;
  vertical-align: middle;
}

.aspect-ratio-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 4px;
}
.aspect-btn {
  padding: 5px 0;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 10.5px;
  font-weight: 600;
  cursor: pointer;
}
.aspect-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #FFFFFF;
}

.crop-toggle-btn {
  width: 100%;
  padding: 7px 10px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-main);
  cursor: pointer;
  font-weight: 600;
  font-size: 11px;
}
.crop-toggle-btn:hover {
  background: var(--bg-hover);
}
.crop-readout {
  font-size: 10.5px;
  color: var(--text-muted);
  text-align: center;
}

.history-list {
  max-height: 110px;
  overflow-y: auto;
  padding: 4px 12px 8px;
  display: flex;
  flex-direction: column;
  gap: 3px;
}
.history-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 5px 8px;
  border-radius: 4px;
  border: none;
  background: transparent;
  color: var(--text-sub);
  font-size: 11px;
  cursor: pointer;
  text-align: left;
}
.history-item.active {
  background: var(--bg-card);
  color: var(--text-main);
  font-weight: 600;
}

/* ── AI 공간 편집 패널 ──────────────────────────────────────── */
.ai-feature-tabs {
  flex: 0 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  padding: 8px 12px;
  background: var(--bg-app);
  border-bottom: 1px solid var(--border-subtle);
}
.ai-subtab {
  padding: 6px 4px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s;
}
.ai-subtab:hover {
  color: var(--text-main);
}
.ai-subtab.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #FFFFFF;
}

.ai-status-banner {
  flex: 0 0 auto;
  margin: 10px 12px 0;
  padding: 9px 12px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  gap: 8px;
}
.ai-status-banner[hidden] {
  display: none !important;
}
.ai-status-banner strong {
  display: block;
  font-size: 11.5px;
  color: var(--text-main);
}
.ai-status-banner p {
  margin: 2px 0 0;
  font-size: 10.5px;
  color: var(--text-sub);
}
.ai-spinner {
  width: 15px;
  height: 15px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  flex-shrink: 0;
}

.ai-version-bar {
  flex: 0 0 auto;
  margin: 8px 12px 0;
  padding: 7px 10px;
  border-radius: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 11px;
  color: var(--text-main);
  font-weight: 600;
}
.ai-version-bar[hidden] {
  display: none !important;
}

.ai-tool-card {
  flex: 1 1 0;
  min-height: 0;
  overflow-y: auto;
  padding: 12px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 9px;
}
.ai-tool-card > * {
  flex-shrink: 0;
}
.ai-tool-card[hidden] {
  display: none !important;
}
.ai-tool-desc {
  margin: 0;
  padding: 8px 10px;
  border-radius: 6px;
  background: var(--bg-app);
  border: 1px solid var(--border-subtle);
  color: var(--text-sub);
  font-size: 11px;
  line-height: 1.45;
}

.ai-chip-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}
.ai-option-chip {
  padding: 7px 9px;
  border-radius: 5px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-sub);
  font-size: 11.5px;
  font-weight: 500;
  cursor: pointer;
  text-align: left;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: all 0.15s;
}
.ai-option-chip:hover {
  background: var(--bg-card);
  color: var(--text-main);
}
.ai-option-chip.active {
  border-color: var(--accent);
  background: var(--accent);
  color: #FFFFFF;
  font-weight: 600;
}

.ai-preset-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.ai-pill {
  padding: 4px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-card);
  color: var(--text-sub);
  font-size: 10.5px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
}
.ai-pill:hover {
  border-color: var(--accent);
  color: var(--text-main);
}

.ai-textarea {
  width: 100%;
  min-height: 64px;
  flex-shrink: 0;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  color: var(--text-main);
  font-size: 12px;
  resize: vertical;
  line-height: 1.45;
  outline: none;
}
.ai-textarea:focus {
  border-color: var(--accent);
}

.file-input-compact {
  font-size: 11px;
  color: var(--text-sub);
}

.ai-run-btn {
  margin-top: 4px;
  width: 100%;
  padding: 11px 14px;
  border-radius: 6px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #FFFFFF;
  font-weight: 600;
  font-size: 12.5px;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.15s;
}
.ai-run-btn:hover:not(:disabled) {
  background: var(--accent-hover);
}
.ai-run-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* ── 우측 하단 확정/저장 영역 ── */
.right-panel-footer {
  flex: 0 0 auto;
  padding: 10px 14px;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-app);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.batch-queue-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 6px;
  background: var(--bg-panel);
  border: 1px solid var(--accent);
}
.batch-queue-box[hidden] {
  display: none !important;
}
.queue-spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--border-subtle);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
.queue-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  font-size: 11px;
}

.confirm-btn {
  width: 100%;
  padding: 9px 12px;
  border-radius: 6px;
  font-weight: 600;
  font-size: 12px;
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
  transition: all 0.15s;
}
.confirm-btn.primary {
  background: var(--accent);
  color: #FFFFFF;
}
.confirm-btn.primary:hover:not(:disabled) {
  background: var(--accent-hover);
}
.confirm-btn.batch {
  background: var(--bg-panel);
  border-color: var(--border-subtle);
  color: var(--text-main);
}
.confirm-btn.batch:hover:not(:disabled) {
  background: var(--bg-card);
}
.confirm-btn:disabled {
  opacity: 0.38;
  cursor: not-allowed;
}