body {
  overflow: hidden;
  display: flex;
  flex-direction: column;
  height: 100vh;
  user-select: none;
  -webkit-user-select: none;
}

/* ---- Layout ---- */
#app {
  display: grid;
  grid-template-columns: 260px 1fr;
  grid-template-rows: 1fr auto;
  grid-template-areas:
    "input preview"
    "toolbar toolbar";
  flex: 1;
  min-height: 0;
  gap: 0;
}

/* ---- Left panel: Input ---- */
#input-panel {
  grid-area: input;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  overflow-y: auto;
  border-right: 1px solid var(--sz-color-button-shadow);
}

label {
  display: block;
  margin-bottom: 2px;
  font-weight: bold;
  font-size: 11px;
}

select, input[type="text"], input[type="number"], input[type="color"], textarea {
  width: 100%;
  padding: 2px 4px;
  font-family: inherit;
  font-size: 11px;
  outline: none;
  resize: none;
}

textarea#data-input {
  min-height: 48px;
  flex-shrink: 0;
  font-family: 'Lucida Console', 'Consolas', monospace;
  font-size: 11px;
}

.field-group {
  flex-shrink: 0;
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
}

.field-inline {
  display: flex;
  align-items: center;
  gap: 4px;
}

.field-inline label {
  flex-shrink: 0;
  margin-bottom: 0;
  min-width: 30px;
}

.field-inline input, .field-inline select {
  flex: 1;
  min-width: 0;
}

/* input type fields */
#type-fields {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.type-section { display: none; }
.type-section.active { display: flex; flex-direction: column; gap: 4px; }

fieldset {
  border: 1px solid var(--sz-color-button-shadow);
  padding: 4px 6px;
  margin: 0;
}

legend {
  font-size: 10px;
  font-weight: bold;
  padding: 0 3px;
}

/* ---- Right panel: Preview ---- */
#preview-panel {
  grid-area: preview;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  overflow-y: auto;
  align-items: center;
}

#qr-container {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  min-height: 80px;
  overflow: hidden;
}

#qr-canvas {
  image-rendering: pixelated;
  border: 1px solid var(--sz-color-button-shadow);
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

#preview-options {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 3px 8px;
  align-items: center;
  width: 100%;
  max-width: 280px;
  flex-shrink: 0;
}

#preview-options label {
  font-weight: normal;
  font-size: 10px;
  text-align: right;
  margin-bottom: 0;
}

#preview-options input[type="color"] {
  width: 40px;
  height: 20px;
  padding: 0;
  border: 1px solid var(--sz-color-button-shadow);
  cursor: pointer;
}

#preview-options select, #preview-options input[type="number"] {
  font-size: 10px;
  padding: 1px 3px;
}

#logo-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

#logo-row label { margin-bottom: 0; font-size: 10px; }

#logo-preview {
  width: 20px;
  height: 20px;
  object-fit: contain;
  border: 1px solid var(--sz-color-button-shadow);
  display: none;
}

#logo-preview.has-logo {
  display: block;
}

#preview-options input[type="range"] {
  width: 100%;
  cursor: pointer;
}

#qr-info {
  font-size: 10px;
  color: var(--sz-color-gray-text);
  text-align: center;
  flex-shrink: 0;
}

/* ---- Bottom toolbar ---- */
#toolbar {
  grid-area: toolbar;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px 8px;
  border-top: 1px solid var(--sz-color-button-shadow);
  flex-shrink: 0;
}

#toolbar button {
  min-width: 60px;
}

#logo-row button {
  font-size: 10px;
}

/* dropdown for PNG sizes */
.dropdown-wrap {
  position: relative;
  display: inline-block;
}

.dropdown-menu {
  display: none;
  position: absolute;
  bottom: 100%;
  left: 0;
  background: var(--sz-color-window);
  border: 1px solid var(--sz-color-button-shadow);
  z-index: 100;
  min-width: 100%;
}

.dropdown-menu.open { display: block; }

.dropdown-item {
  padding: 3px 10px;
  cursor: default;
  white-space: nowrap;
  font-size: 11px;
}

.dropdown-item:hover {
  background: var(--sz-color-highlight);
  color: var(--sz-color-highlight-text);
}