:root {
  color-scheme: light;
  --app-background: #edf2f8;
  --page-glow: rgba(37, 99, 235, 0.16);
  --page-glow-soft: rgba(14, 165, 233, 0.1);
  --panel-background: rgba(255, 255, 255, 0.94);
  --panel-background-soft: #f7f9fc;
  --panel-background-strong: #e4ebf4;
  --panel-border: #d4deea;
  --panel-shadow: 0 20px 44px rgba(15, 23, 42, 0.08);
  --text-color: #0f172a;
  --muted-color: #526276;
  --button-background: #ffffff;
  --button-border: #c8d3e2;
  --button-text: #102033;
  --button-hover: #eef4ff;
  --button-active: #dbeafe;
  --accent-color: #2563eb;
  --accent-strong: #1d4ed8;
  --accent-soft: rgba(37, 99, 235, 0.14);
  --danger-color: #dc2626;
  --danger-soft: rgba(220, 38, 38, 0.1);
  --status-info: #475569;
  --status-loading: #1d4ed8;
  --status-ready: #047857;
  --status-error: #b91c1c;
  --canvas-background: #f0f4fa;
  --canvas-nav-background: rgba(255, 255, 255, 0.88);
  --canvas-nav-border: rgba(148, 163, 184, 0.34);
  --canvas-nav-shadow: 0 18px 34px rgba(15, 23, 42, 0.14);
  --canvas-nav-text: #0f172a;
}

html[data-theme="dark"] {
  color-scheme: dark;
  --app-background: #020617;
  --page-glow: rgba(59, 130, 246, 0.18);
  --page-glow-soft: rgba(34, 211, 238, 0.1);
  --panel-background: rgba(15, 23, 42, 0.92);
  --panel-background-soft: #111c2f;
  --panel-background-strong: #18253a;
  --panel-border: #334155;
  --panel-shadow: 0 22px 48px rgba(2, 6, 23, 0.45);
  --text-color: #e7eef8;
  --muted-color: #9aabbe;
  --button-background: #162235;
  --button-border: #344358;
  --button-text: #f8fafc;
  --button-hover: #1f2d44;
  --button-active: #1d4ed8;
  --accent-color: #60a5fa;
  --accent-strong: #3b82f6;
  --accent-soft: rgba(96, 165, 250, 0.16);
  --danger-color: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.14);
  --status-info: #d1d9e5;
  --status-loading: #93c5fd;
  --status-ready: #6ee7b7;
  --status-error: #fca5a5;
  --canvas-background: #09111f;
  --canvas-nav-background: rgba(15, 23, 42, 0.86);
  --canvas-nav-border: rgba(148, 163, 184, 0.2);
  --canvas-nav-shadow: 0 20px 38px rgba(2, 6, 23, 0.42);
  --canvas-nav-text: #f8fafc;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, var(--page-glow), transparent 32%),
    radial-gradient(circle at top right, var(--page-glow-soft), transparent 28%),
    linear-gradient(180deg, rgba(148, 163, 184, 0.08), transparent 24%),
    var(--app-background);
  color: var(--text-color);
  overflow-x: hidden;
}

button,
select,
input[type="range"] {
  font: inherit;
}

button,
.file-picker,
select {
  min-height: 48px;
  border: 1px solid var(--button-border);
  border-radius: 14px;
  background: var(--button-background);
  color: var(--button-text);
  line-height: 1.25;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease, transform 150ms ease, box-shadow 150ms ease;
}

button,
.file-picker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 11px 16px;
}

button,
.file-picker,
select {
  cursor: pointer;
}

button:hover:not(:disabled),
.file-picker:hover,
select:hover:not(:disabled) {
  background: var(--button-hover);
  border-color: var(--accent-color);
  box-shadow: 0 10px 24px rgba(37, 99, 235, 0.08);
}

button:active:not(:disabled):not(.canvas-nav),
.file-picker:active {
  transform: translateY(1px);
}

button:focus-visible,
.file-picker:focus-visible,
select:focus-visible,
input[type="range"]:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
}

button:disabled,
select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  box-shadow: none;
}

select {
  min-width: 168px;
  padding: 10px 14px;
}

input[type="range"] {
  width: 100%;
  accent-color: var(--accent-color);
}

.wrap {
  max-width: 1360px;
  margin: 0 auto;
  padding: 24px;
}

.app-header,
.photo-bar,
.canvas-panel,
.side-panel {
  background: var(--panel-background);
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  box-shadow: var(--panel-shadow);
}

.app-header {
  margin-bottom: 16px;
  padding: 18px;
}

.app-topbar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
}

h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.15;
}

.preferences-panel {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
  justify-content: flex-end;
}

.setting-group {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.setting-label {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted-color);
}

.language-menu {
  position: relative;
  min-width: 220px;
}

.language-menu-button {
  width: 100%;
  justify-content: space-between;
  padding-right: 12px;
}

.language-menu-current {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.language-menu-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: var(--muted-color);
  transition: transform 150ms ease;
}

.language-menu-chevron svg {
  width: 100%;
  height: 100%;
}

.language-menu[data-open="true"] .language-menu-chevron {
  transform: rotate(180deg);
}

.language-menu-list {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  z-index: 20;
  display: grid;
  gap: 6px;
  padding: 8px;
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  background: var(--panel-background);
  box-shadow: var(--panel-shadow);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-6px);
  max-height: min(320px, 65vh);
  overflow: auto;
  transition: opacity 150ms ease, transform 150ms ease;
}

.language-menu[data-open="true"] .language-menu-list {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.language-option {
  width: 100%;
  min-height: 44px;
  justify-content: flex-start;
  padding: 10px 12px;
  border: 1px solid transparent;
  background: transparent;
  border-radius: 12px;
  box-shadow: none;
}

.language-option:hover:not(:disabled),
.language-option:focus-visible {
  background: var(--button-hover);
  border-color: var(--accent-color);
  box-shadow: none;
}

.language-option[data-selected="true"] {
  background: var(--accent-soft);
  border-color: var(--accent-color);
}

.language-option-flag {
  font-size: 18px;
  line-height: 1;
}

.language-option-label {
  white-space: nowrap;
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 164px;
  padding-inline: 12px 16px;
  background: var(--panel-background-soft);
}

.theme-toggle-icons {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border-radius: 999px;
  background: var(--button-background);
  border: 1px solid var(--button-border);
}

.theme-icon {
  width: 17px;
  height: 17px;
  padding: 2px;
  border-radius: 999px;
  color: var(--muted-color);
  transition: color 150ms ease, background-color 150ms ease;
}

html[data-theme="light"] .theme-icon-sun,
html:not([data-theme]) .theme-icon-sun,
html[data-theme="dark"] .theme-icon-moon {
  color: var(--accent-color);
  background: var(--accent-soft);
}

.theme-toggle-text {
  font-weight: 700;
}

.status-banner {
  margin: 16px 0 0;
  padding: 13px 16px;
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  background: var(--panel-background-soft);
  font-size: 14px;
}

.status-banner[data-tone="info"] {
  color: var(--status-info);
}

.status-banner[data-tone="loading"] {
  color: var(--status-loading);
}

.status-banner[data-tone="ready"] {
  color: var(--status-ready);
}

.status-banner[data-tone="error"] {
  color: var(--status-error);
}

.photo-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 18px;
  margin-bottom: 16px;
  padding: 16px 18px;
}

.photo-bar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  flex: 1 1 420px;
}

@media (min-width: 821px) {
  .photo-bar-action-control {
    width: 184px;
    max-width: 100%;
    justify-content: center;
  }

  .photo-bar-actions #saveBtn,
  .photo-bar-actions #saveAllBtn {
    background: var(--button-background);
    border-color: var(--button-border);
    color: var(--button-text);
  }

  .photo-bar-actions #saveBtn:hover:not(:disabled),
  .photo-bar-actions #saveAllBtn:hover:not(:disabled) {
    background: var(--button-hover);
    border-color: var(--accent-color);
    color: var(--button-text);
  }
}

.photo-bar-summary {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 220px;
  padding: 10px 14px;
  border: 1px solid var(--panel-border);
  border-radius: 16px;
  background: var(--panel-background-soft);
  flex: 0 1 320px;
}

.photo-bar-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--muted-color);
}

.photo-bar-text {
  font-size: 14px;
}

.file-picker,
.icon-button {
  font-weight: 700;
}

.button-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  flex: 0 0 18px;
}

.button-icon svg {
  width: 100%;
  height: 100%;
}

.danger-button {
  border-color: rgba(220, 38, 38, 0.25);
}

.danger-button:hover:not(:disabled) {
  background: var(--danger-soft);
  border-color: var(--danger-color);
  color: var(--danger-color);
}

.stage {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 16px;
  align-items: start;
  min-width: 0;
}

.workspace-column {
  display: grid;
  gap: 16px;
  min-width: 0;
}

.mobile-primary-actions {
  display: none;
  gap: 10px;
  padding: 10px;
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  background: var(--panel-background);
  box-shadow: var(--panel-shadow);
  backdrop-filter: blur(14px);
  z-index: 4;
}

.mobile-primary-actions button {
  width: 100%;
  min-height: 52px;
  justify-content: center;
  font-weight: 700;
}

.canvas-panel {
  position: relative;
  min-height: 620px;
  min-width: 0;
  padding: 18px;
}

.canvas-meta {
  position: absolute;
  top: 18px;
  left: 18px;
  right: 18px;
  display: flex;
  justify-content: center;
  pointer-events: none;
  z-index: 2;
}

.canvas-badge {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 7px 12px;
  border: 1px solid var(--panel-border);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.72);
  color: #f8fafc;
  font-size: 13px;
  font-weight: 700;
  backdrop-filter: blur(10px);
}

.canvas-wrap {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  min-height: 580px;
  min-width: 0;
  max-width: 100%;
  max-height: min(78vh, 940px);
  overflow: auto;
  overscroll-behavior: contain;
  padding: 52px 72px;
  background: var(--panel-background-soft);
  border: 1px solid var(--panel-border);
  border-radius: 18px;
}

canvas {
  display: block;
  max-width: none;
  background: var(--canvas-background);
  border-radius: 10px;
  touch-action: none;
}

.canvas-nav {
  position: absolute;
  top: 50%;
  z-index: 3;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  padding: 0;
  overflow: hidden;
  border-radius: 999px;
  background: var(--canvas-nav-background);
  color: var(--canvas-nav-text);
  border-color: var(--canvas-nav-border);
  box-shadow: var(--canvas-nav-shadow);
  transform: translateY(-50%);
  backdrop-filter: blur(12px);
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.canvas-nav svg {
  width: 22px;
  height: 22px;
  pointer-events: none;
}

.canvas-nav .visually-hidden {
  pointer-events: none;
}

.canvas-nav-prev {
  left: 24px;
}

.canvas-nav-next {
  right: 24px;
}

.canvas-nav:disabled {
  opacity: 0.34;
  pointer-events: none;
}

.utility-panels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  min-width: 0;
}

.side-panel {
  display: grid;
  gap: 14px;
  padding: 16px;
  align-content: start;
  min-width: 0;
}

.tool-section {
  display: block;
  padding: 16px;
  border: 1px solid var(--panel-border);
  border-radius: 18px;
  background: var(--panel-background-soft);
  min-width: 0;
  max-width: 100%;
}

.tool-section-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  list-style: none;
  cursor: pointer;
}

.tool-section-summary::-webkit-details-marker {
  display: none;
}

.tool-section-summary:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: 2px;
  border-radius: 12px;
}

.tool-section h2 {
  margin: 0;
  font-size: 16px;
}

.tool-section-content {
  margin-top: 14px;
}

.tool-section-chevron {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  color: var(--muted-color);
  transition: transform 150ms ease;
}

.tool-section-chevron svg {
  width: 100%;
  height: 100%;
}

.collapsible-section[open] > .tool-section-summary .tool-section-chevron {
  transform: rotate(180deg);
}

.collapsible-section[data-collapsible="false"] > .tool-section-summary {
  cursor: default;
  pointer-events: none;
}

.collapsible-section[data-collapsible="false"] > .tool-section-summary .tool-section-chevron {
  display: none;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 14px;
}

.field:last-child {
  margin-bottom: 0;
}

.field label {
  font-size: 13px;
  font-weight: 700;
  color: var(--muted-color);
}

.muted {
  color: var(--muted-color);
  font-size: 13px;
  line-height: 1.45;
}

.tool-actions {
  display: grid;
  gap: 10px;
}

.tool-actions button {
  width: 100%;
  justify-content: center;
  font-weight: 700;
}

.tool-section-boxes .tool-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tool-section-detection .tool-actions {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.tool-section-detection .tool-actions button {
  min-height: 56px;
  font-size: 17px;
}

#autoDetectBtn,
#saveBtn,
#addBoxBtn {
  background: var(--accent-color);
  border-color: var(--accent-color);
  color: #ffffff;
}

#autoDetectBtn:hover:not(:disabled),
#saveBtn:hover:not(:disabled),
#addBoxBtn:hover:not(:disabled) {
  background: var(--accent-strong);
  border-color: var(--accent-strong);
  color: #ffffff;
}

#deleteBoxBtn {
  justify-content: center;
}

#clearBoxesBtn {
  grid-column: 1 / -1;
}

.box-list {
  max-height: 250px;
  margin-top: 14px;
  overflow: auto;
  display: grid;
  gap: 8px;
}

.box-item {
  display: block;
  width: 100%;
  margin: 0;
  padding: 11px 13px;
  border: 1px solid var(--panel-border);
  border-radius: 14px;
  background: var(--button-background);
  color: var(--button-text);
  text-align: left;
  font-size: 13px;
}

.box-item.selected {
  border-color: var(--accent-color);
  background: var(--accent-soft);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

body[data-busy="true"] .file-picker {
  opacity: 0.5;
  pointer-events: none;
}

@media (max-width: 1180px) {
  .stage {
    grid-template-columns: minmax(0, 1fr);
  }

  .canvas-panel {
    min-height: 560px;
  }

  .side-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .utility-panels {
    grid-template-columns: minmax(0, 1fr);
  }

  .tool-section-boxes .tool-actions {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .canvas-wrap {
    min-height: 440px;
    padding: 46px 28px 82px;
  }
}

@media (max-width: 820px) {
  .wrap {
    padding: 14px;
  }

  .app-topbar,
  .photo-bar {
    flex-direction: column;
    justify-content: flex-start;
    align-items: stretch;
  }

  .app-header {
    padding: 16px;
  }

  .preferences-panel,
  .photo-bar-actions {
    width: 100%;
  }

  .preferences-panel {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    justify-content: stretch;
    gap: 10px;
  }

  .preferences-panel .setting-group {
    display: block;
    position: relative;
    width: auto;
  }

  .preferences-panel .setting-group-language {
    min-width: 0;
  }

  .preferences-panel .setting-label {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
  }

  .preferences-panel .theme-toggle {
    width: auto;
    min-width: 0;
    padding: 8px;
    gap: 0;
    justify-content: center;
  }

  .preferences-panel .theme-toggle-text {
    display: none;
  }

  .preferences-panel .theme-toggle-icons {
    gap: 5px;
  }

  .preferences-panel .language-menu {
    min-width: 0;
    width: 100%;
  }

  .photo-bar-actions {
    flex: 0 0 auto;
    align-content: flex-start;
  }

  .photo-bar-actions > * {
    width: 100%;
  }

  .language-menu,
  .language-menu-button,
  .file-picker,
  .icon-button,
  .photo-bar-actions button,
  select {
    width: 100%;
  }

  .photo-bar-summary {
    min-width: 0;
    flex: 0 0 auto;
    align-content: flex-start;
  }

  .stage,
  .workspace-column,
  .utility-panels,
  .side-panel {
    gap: 12px;
    width: 100%;
    max-width: 100%;
  }

  .workspace-column > *,
  .utility-panels > *,
  .side-panel > * {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  .utility-panels,
  .side-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .utility-panels {
    display: none;
  }

  .side-panel .tool-section-boxes {
    display: none;
  }

  .canvas-panel {
    min-height: 0;
    padding: 14px;
  }

  .canvas-wrap {
    min-height: 360px;
    max-height: min(68svh, 640px);
    padding: 34px 16px 78px;
  }

  body[data-mobile-actions="true"] .workspace-column {
    padding-bottom: 0;
  }

  body[data-mobile-actions="true"] .mobile-primary-actions {
    position: sticky;
    bottom: max(12px, env(safe-area-inset-bottom));
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-rows: repeat(2, auto);
    grid-auto-flow: column;
    margin-top: -2px;
  }

  .mobile-primary-actions button {
    font-size: 12.5px;
    padding-inline: 8px;
    line-height: 1.2;
  }

  body[data-mobile-actions="true"] .mobile-primary-actions button {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #ffffff;
  }

  body[data-mobile-actions="true"] .mobile-primary-actions button:hover:not(:disabled) {
    background: var(--accent-strong);
    border-color: var(--accent-strong);
    color: #ffffff;
  }
}

@media (max-width: 700px) {
  body[data-mobile-actions="true"] .mobile-primary-actions {
    gap: 8px;
  }
}

@media (max-width: 640px) {
  .wrap {
    padding: 12px;
  }

  .app-header,
  .photo-bar,
  .canvas-panel,
  .side-panel {
    border-radius: 18px;
  }

  .app-header,
  .photo-bar,
  .side-panel {
    padding: 14px;
  }

  h1 {
    font-size: 22px;
  }

  .preferences-panel,
  .photo-bar-actions {
    gap: 8px;
  }

  .canvas-panel {
    padding: 10px;
  }

  .canvas-meta {
    top: 12px;
    left: 12px;
    right: 12px;
  }

  .canvas-wrap {
    min-height: 300px;
    max-height: min(62svh, 540px);
    padding: 34px 10px 84px;
  }

  .canvas-nav {
    top: auto;
    bottom: 12px;
    transform: none;
    width: 50px;
    height: 50px;
  }

  .canvas-nav-prev {
    left: 12px;
  }

  .canvas-nav-next {
    right: 12px;
  }

  .canvas-badge {
    min-height: 30px;
    padding: 6px 10px;
    font-size: 12px;
  }

  .side-panel {
    gap: 12px;
  }

  .tool-section {
    padding: 14px;
  }

  .tool-section-boxes .tool-actions,
  .tool-section-detection .tool-actions {
    grid-template-columns: 1fr;
  }

  .tool-actions button,
  .box-item {
    min-height: 48px;
  }
}

@media (max-width: 480px) {
  .wrap {
    padding: 10px;
  }

  .app-header,
  .photo-bar,
  .canvas-panel,
  .side-panel {
    border-radius: 16px;
  }

  .app-header,
  .photo-bar,
  .side-panel {
    padding: 12px;
  }

  .theme-toggle,
  .language-menu-button,
  .tool-actions button,
  .file-picker,
  .icon-button {
    min-height: 44px;
  }

  .canvas-wrap {
    min-height: 280px;
    max-height: min(58svh, 460px);
    padding: 32px 8px 82px;
  }

  .tool-section {
    padding: 12px;
  }

  body[data-mobile-actions="true"] .mobile-primary-actions {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-template-rows: repeat(2, auto);
    grid-auto-flow: column;
    padding: 8px;
  }

  .mobile-primary-actions button {
    min-height: 48px;
    font-size: 11.5px;
  }
}