:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-2: #242836;
  --border: #2e3348;
  --text: #e8eaef;
  --text-muted: #8b92a8;
  --accent: #5b8def;
  --accent-hover: #7aa3f5;
  --success: #3ecf8e;
  --radius: 12px;
  --font: "DM Sans", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
}

.app {
  max-width: 1100px;
  margin: 0 auto;
  padding: 1.5rem;
}

.header {
  margin-bottom: 2rem;
}

.header__brand {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.header__icon {
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
}

.header h1 {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
}

.header__subtitle {
  margin: 0.25rem 0 0;
  color: var(--text-muted);
  font-size: 0.9rem;
}

.main {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}

.panel h2 {
  margin: 0 0 0.75rem;
  font-size: 1rem;
  font-weight: 600;
}

.panel__help {
  margin: 0 0 1rem;
  color: var(--text-muted);
  font-size: 0.875rem;
}

.dropzone {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  padding: 2rem 1.5rem;
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--accent);
  background: rgba(91, 141, 239, 0.06);
}

.dropzone__icon {
  font-size: 1.75rem;
}

.dropzone__text {
  font-weight: 500;
}

.dropzone__hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.filename {
  margin: 0.75rem 0 0;
  font-size: 0.85rem;
  color: var(--success);
}

.codes-summary {
  margin-top: 0.75rem;
  font-size: 0.9rem;
}

.codes-fallback {
  width: 100%;
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-family: inherit;
  font-size: 0.875rem;
  resize: vertical;
}

.codes-fallback:focus {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn-link {
  margin-left: 0.5rem;
  padding: 0;
  background: none;
  border: none;
  color: var(--accent);
  font: inherit;
  cursor: pointer;
  text-decoration: underline;
}

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

.tool-bar {
  margin-bottom: 1rem;
}

.tool-bar__modes {
  display: inline-flex;
  gap: 0.35rem;
  padding: 0.25rem;
  background: var(--surface-2);
  border-radius: 8px;
  border: 1px solid var(--border);
}

.tool-btn {
  padding: 0.45rem 0.9rem;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
}

.tool-btn:hover {
  color: var(--text);
}

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

.editor-layout {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: 1.25rem;
}

@media (max-width: 768px) {
  .editor-layout {
    grid-template-columns: 1fr;
  }
}

.canvas-wrap {
  position: relative;
  background: var(--surface-2);
  border-radius: 8px;
  overflow: hidden;
  max-height: 70vh;
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

#preview-canvas {
  display: block;
  max-width: 100%;
  height: auto;
  cursor: crosshair;
  touch-action: none;
}

#preview-canvas.mode-zone {
  cursor: cell;
}

#preview-canvas.mode-number {
  cursor: pointer;
}

.zone-handle {
  position: absolute;
  pointer-events: none;
  border: 2px dashed #3b9eff;
  background: rgba(59, 158, 255, 0.12);
  box-sizing: border-box;
  z-index: 2;
}

.zone-handle__label {
  position: absolute;
  top: -1.4rem;
  left: 0;
  font-size: 0.7rem;
  font-weight: 700;
  color: #3b9eff;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.qr-handle {
  position: absolute;
  pointer-events: none;
  border: 2px dashed var(--accent);
  box-sizing: border-box;
  z-index: 3;
}

.qr-handle__box {
  width: 100%;
  height: 100%;
  background: rgba(91, 141, 239, 0.15);
}

.num-handle {
  position: absolute;
  pointer-events: none;
  border: 2px dashed #e8a838;
  box-sizing: border-box;
  z-index: 4;
  min-width: 24px;
  min-height: 24px;
}

.num-handle__label {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 700;
  color: #e8a838;
  opacity: 0.9;
}

.controls-group {
  margin: 0;
  padding: 0.75rem;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface-2);
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.controls-group__title {
  padding: 0 0.25rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.controls-group--disabled .control:not(.control--checkbox),
.controls-group--disabled .control-hint {
  opacity: 0.45;
  pointer-events: none;
}

.control--checkbox {
  flex-direction: row;
  align-items: center;
  gap: 0.5rem;
}

.control--checkbox input[type="checkbox"] {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}

.control--checkbox span {
  color: var(--text);
}

.control input[type="color"] {
  width: 100%;
  height: 2.25rem;
  padding: 0.15rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
}

.control-hint {
  margin: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.45;
}

.coords-box {
  padding: 0.75rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  margin-bottom: 0.25rem;
}

.coords-box__title {
  margin: 0 0 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.coords-box__title--zone {
  margin-top: 0.75rem;
}

.coords-list {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.35rem 0.75rem;
}

.coords-list > div {
  display: contents;
}

.coords-list dt {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.coords-list dd {
  margin: 0;
  font-size: 0.85rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.btn--block {
  width: 100%;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.control-row input[type="number"] {
  flex: 1;
  padding: 0.45rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
}

.control-row output {
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.controls {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.control {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-size: 0.85rem;
}

.control span {
  color: var(--text-muted);
}

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

.control input[type="number"],
.control select {
  padding: 0.5rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
}

.control output {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.btn {
  padding: 0.65rem 1.25rem;
  border: none;
  border-radius: 8px;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

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

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

.btn--secondary {
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
}

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

.btn--danger {
  background: #e5484d;
  color: #fff;
}

.btn--danger:hover:not(:disabled) {
  background: #f2555a;
}

.export-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.progress {
  margin-top: 1rem;
  height: 28px;
  background: var(--surface-2);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.progress__bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.15s;
}

.progress__text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 600;
}

.modal {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  background: var(--surface);
  color: var(--text);
  max-width: 90vw;
  width: 420px;
}

.modal::backdrop {
  background: rgba(0, 0, 0, 0.6);
}

.modal__content {
  padding: 1.25rem;
}

.modal__content h3 {
  margin: 0 0 1rem;
}

.codes-list {
  max-height: 300px;
  overflow-y: auto;
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  font-size: 0.85rem;
}

.codes-list li {
  margin-bottom: 0.25rem;
  word-break: break-all;
}