* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-hover: #f0f1f3;
  --border: #e0e2e8;
  --text: #1a1a2e;
  --text-dim: #7a7d8e;
  --accent: #5b4cdb;
  --accent-hover: #4a3bc8;
  --success: #0ea47a;
  --danger: #d9534f;
  --input-bg: #f8f9fb;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  min-height: 100vh;
  margin: 0;
}

/* ── Navigation bar ── */
.nav-bar {
  display: flex;
  align-items: center;
  gap: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: 52px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
}

.nav-bar .nav-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.3px;
  margin-right: 24px;
  color: var(--accent);
}

.nav-bar a {
  display: inline-flex;
  align-items: center;
  height: 52px;
  padding: 0 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: all 0.15s;
}

.nav-bar a:hover {
  color: var(--text);
  background: var(--surface-hover);
}

.nav-bar a.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ── Page container ── */
.page-container {
  max-width: 960px;
  margin: 0 auto;
  padding: 20px;
}

/* ── Two-column layout (combo page) ── */
.layout {
  display: flex;
  height: calc(100vh - 52px);
  overflow: hidden;
}

.canvas-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #ffffff;
  min-width: 0;
  padding: 12px;
  position: relative;
}

.canvas-panel canvas {
  max-height: 100%;
  max-width: 100%;
  display: block;
  border-radius: 4px;
  object-fit: contain;
  user-select: none;
  -webkit-user-select: none;
  outline: none;
}

.guides-toggle {
  position: absolute;
  bottom: 20px;
  left: 20px;
  display: flex;
  align-items: center;
  gap: 6px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 12px;
  cursor: pointer;
  user-select: none;
}

.guides-toggle input[type="checkbox"] {
  accent-color: #00bfff;
}

.shortcut-guide {
  position: absolute;
  bottom: 20px;
  right: 20px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  background: rgba(0,0,0,0.65);
  color: #fff;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 11px;
  user-select: none;
  pointer-events: none;
}

.shortcut-guide-title {
  font-weight: 700;
  margin-bottom: 2px;
  color: #00bfff;
  font-size: 12px;
}

.shortcut-guide kbd {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 3px;
  padding: 0 4px;
  font-family: inherit;
  font-size: 10px;
  line-height: 1.6;
}

.control-panel {
  width: 620px;
  min-width: 620px;
  height: calc(100vh - 52px);
  overflow-y: auto;
  background: var(--bg);
  border-left: 1px solid var(--border);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── Card ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  margin-top: 8px;
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.card-header h3 {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* Section colored borders */
.card-top { border-left: 3px solid #fd79a8; }
.card-mid { border-left: 3px solid #fdcb6e; }
.card-bot { border-left: 3px solid #74b9ff; }
.card-global { border-left: 3px solid var(--accent); }

.card-top.card-selected { border-left: 3px solid #fd79a8; box-shadow: 0 0 0 2px #fd79a8; }
.card-mid.card-selected { border-left: 3px solid #fdcb6e; box-shadow: 0 0 0 2px #fdcb6e; }
.card-bot.card-selected { border-left: 3px solid #74b9ff; box-shadow: 0 0 0 2px #74b9ff; }

/* ── Section card (image management) ── */
.section-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  margin-bottom: 16px;
}

.section-card.section-top { border-left: 3px solid #fd79a8; }
.section-card.section-mid { border-left: 3px solid #fdcb6e; }
.section-card.section-bot { border-left: 3px solid #74b9ff; }

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: 15px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.section-header .section-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

/* ── Image list header ── */
.image-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.image-list-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 6px 10px;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2px;
}

.image-list-header .col-thumb { width: 40px; flex-shrink: 0; }
.image-list-header .col-alias { min-width: 50px; }
.image-list-header .col-original { min-width: 80px; flex: 1; }
.image-list-header .col-size { min-width: 60px; }
.image-list-header .col-format { min-width: 40px; }
.image-list-header .col-modified { min-width: 110px; }
.image-list-header .col-actions { min-width: 72px; flex-shrink: 0; }

/* ── Image row ── */
.image-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  transition: background 0.1s;
  contain: layout style;
}

.image-row:hover {
  background: var(--surface-hover);
}

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

.image-row .alias {
  font-size: 13px;
  font-weight: 700;
  font-family: 'SF Mono', 'Fira Code', monospace;
  min-width: 50px;
}

.image-row .original {
  font-size: 12px;
  color: var(--text-dim);
  min-width: 80px;
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.image-row .modified {
  font-size: 11px;
  color: var(--text-dim);
  min-width: 110px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.image-row .file-size {
  font-size: 11px;
  color: var(--text-dim);
  min-width: 60px;
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.image-row .file-format {
  font-size: 11px;
  color: var(--text-dim);
  min-width: 40px;
  font-weight: 600;
}

.image-row .row-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

/* ── Buttons ── */
button {
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--surface-hover);
  border-color: var(--text-dim);
}

.btn-success {
  background: var(--success);
  color: #fff;
}

.btn-success:hover:not(:disabled) {
  background: #00d2a0;
}

.btn-danger {
  background: var(--danger);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: #f07060;
}

.btn-sm {
  padding: 5px 10px;
  font-size: 12px;
  border-radius: 6px;
}

.btn-icon {
  padding: 6px 8px;
  font-size: 14px;
  border-radius: 6px;
  min-width: 32px;
}

.btn-reset {
  font-size: 11px;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 3px 10px;
  border-radius: 4px;
  cursor: pointer;
  transition: all 0.15s;
}

.btn-reset:hover {
  border-color: var(--text-dim);
  color: var(--text);
}

/* ── Controls (settings) ── */
.control-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.control-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.control-item .label {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  font-weight: 500;
}

.control-item .input-row {
  display: flex;
  align-items: center;
  gap: 10px;
}

.control-item input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

.control-item input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
  transition: transform 0.1s;
}

.control-item input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
}

input[type="number"] {
  background: var(--input-bg);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 13px;
  width: 72px;
  text-align: center;
  font-family: 'SF Mono', 'Fira Code', monospace;
  transition: border-color 0.15s;
}

input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
}

input[type="number"]::-webkit-inner-spin-button {
  opacity: 0.5;
}

.global-scale-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.global-scale-row input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  outline: none;
}

.global-scale-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent);
  cursor: pointer;
  border: none;
}

/* ── Combo table ── */
.combo-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  table-layout: fixed;
}

.combo-table th {
  background: var(--input-bg);
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.3px;
  padding: 8px 10px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.combo-table th:last-child {
  width: 50px;
}

.combo-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.combo-table tr {
  cursor: pointer;
  transition: background 0.1s;
}

.combo-table tbody tr:hover {
  background: var(--surface-hover);
}

.combo-table tbody tr.selected {
  background: #eee8ff;
}

.combo-table .status-done {
  color: var(--success);
  font-weight: 700;
}

.combo-table .status-pending {
  color: var(--text-dim);
}

/* ── Progress bars (settings) ── */
.settings-progress {
  margin-bottom: 10px;
}

.progress-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 6px;
}

.progress-label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.progress-numbers {
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  font-family: 'SF Mono', 'Fira Code', monospace;
}

.progress-pct {
  color: var(--success);
  font-weight: 600;
}

.progress-bar-track {
  height: 6px;
  background: var(--border);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: var(--success);
  border-radius: 3px;
  transition: width 0.3s ease;
}

/* ── Filter bar ── */
.filter-bar {
  display: grid;
  grid-template-columns: auto 1fr auto 1fr auto 1fr auto auto;
  gap: 6px 8px;
  align-items: center;
  margin-bottom: 10px;
}

.filter-bar label {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  white-space: nowrap;
}

.filter-bar select {
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 12px;
  color: var(--text);
  cursor: pointer;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}

.filter-bar select.filter-status {
  width: auto;
  min-width: auto;
}

.filter-bar select:focus {
  outline: none;
  border-color: var(--accent);
}

/* ── Pagination ── */
.pagination {
  display: flex;
  gap: 4px;
  align-items: center;
  justify-content: center;
  margin-top: 10px;
  flex-wrap: wrap;
}

.pagination button {
  padding: 4px 10px;
  font-size: 12px;
  border-radius: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
}

.pagination button:hover:not(:disabled) {
  background: var(--surface-hover);
}

.pagination button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.pagination .page-info {
  font-size: 12px;
  color: var(--text-dim);
  padding: 0 8px;
}

/* ── Download page header ── */
.dl-page-header {
  text-align: center;
  padding: 32px 0 24px;
}

.dl-page-header h1 {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 6px;
}

.dl-page-header p {
  font-size: 14px;
  color: var(--text-dim);
}

/* ── Download card (base) ── */
.download-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  margin-bottom: 16px;
}

.download-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.download-card p {
  font-size: 13px;
  color: var(--text-dim);
  margin: 0;
}

.download-card .btn-group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

/* ── Hero card (full export) ── */
.dl-hero {
  display: flex;
  align-items: center;
  gap: 20px;
  background: linear-gradient(135deg, #f0edff 0%, #e8f4f0 100%);
  border: 1px solid #d5d0f0;
  padding: 28px 32px;
  margin-bottom: 24px;
}

.dl-hero .dl-card-body {
  flex: 1;
}

.dl-hero .dl-card-body h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.dl-hero .dl-card-body p {
  margin-bottom: 16px;
}

.btn-export {
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
  background: var(--success);
  color: #fff;
  white-space: nowrap;
}

.btn-export:hover {
  background: #00d2a0;
  transform: translateY(-1px);
}

.btn-export-alt {
  background: var(--accent);
}

.btn-export-alt:hover {
  background: var(--accent-hover);
}

/* ── Card icons ── */
.dl-card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.dl-icon-export {
  background: linear-gradient(135deg, var(--success), #00d2a0);
  color: #fff;
}

.dl-icon-image {
  background: linear-gradient(135deg, #fd79a8, #e84393);
  color: #fff;
}

.dl-icon-settings {
  background: linear-gradient(135deg, #fdcb6e, #f39c12);
  color: #fff;
}

/* ── Download row (unified items) ── */
.dl-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.dl-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 20px 24px;
}

.dl-item-body {
  flex: 1;
  min-width: 0;
}

.dl-item-body h3 {
  margin-bottom: 2px;
}

.dl-item-btns {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.btn-dl {
  border: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.15s;
  background: var(--accent);
  color: #fff;
  white-space: nowrap;
}

.btn-dl:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

/* ── Download status ── */
.dl-status {
  font-size: 13px;
  color: var(--text-dim);
  min-height: 20px;
  margin-top: 16px;
  text-align: center;
}

/* ── Download page responsive ── */
@media (max-width: 640px) {
  .dl-hero {
    flex-direction: column;
    text-align: center;
    padding: 24px 20px;
  }

  .dl-hero .btn-group {
    justify-content: center;
  }

  .dl-item {
    flex-direction: column;
    text-align: center;
    gap: 12px;
  }

  .dl-item-btns {
    width: 100%;
    justify-content: center;
  }
}

/* ── Setting controls wrapper ── */
#settingControls {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* ── Action bar ── */
.action-bar {
  display: flex;
  gap: 8px;
}

/* ── Status ── */
.status {
  font-size: 12px;
  color: var(--text-dim);
  min-height: 18px;
  margin-top: 12px;
}

/* ── Setting info ── */
.setting-info {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.06);
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 13px;
  min-width: 0;
}

.setting-info .filename {
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
}

.setting-info .tag-row {
  display: flex;
  gap: 8px;
  min-width: 0;
}

.setting-info .tag {
  flex: 1;
  min-width: 0;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 8px;
  font-size: 11px;
  color: var(--text-dim);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.setting-info .tag strong {
  color: var(--text);
  margin-left: 4px;
}

/* ── Drop zone ── */
.drop-zone {
  border: 2px dashed var(--border);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  margin-bottom: 10px;
  transition: all 0.15s;
  cursor: pointer;
}

.drop-zone-text {
  font-size: 13px;
  color: var(--text-dim);
  pointer-events: none;
}

.drop-zone.drag-over {
  border-color: var(--accent);
  background: #eee8ff;
}

.drop-zone.drag-over .drop-zone-text {
  color: var(--accent);
}

/* ── Empty state ── */
.empty-state {
  text-align: center;
  padding: 24px;
  color: var(--text-dim);
  font-size: 13px;
}

/* ── File input hidden ── */
.file-input-hidden {
  display: none;
}

/* ── Scrollbar ── */
.control-panel::-webkit-scrollbar {
  width: 6px;
}

.control-panel::-webkit-scrollbar-track {
  background: transparent;
}

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

.control-panel::-webkit-scrollbar-thumb:hover {
  background: var(--text-dim);
}

/* ── Loading overlay ── */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.35);
  z-index: 9999;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

.loading-overlay.active {
  display: flex;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ── Responsive ── */
@media (max-width: 960px) {
  .layout {
    flex-direction: column;
    height: auto;
    overflow: visible;
  }

  .canvas-panel {
    height: 50vh;
    min-height: 300px;
  }

  .control-panel {
    width: 100%;
    min-width: unset;
    height: auto;
    border-left: none;
    border-top: 1px solid var(--border);
  }
}