/* Workspace styles: file cards, settings controls and zone separation.
 * Loaded last so it defines the workspace look in one place. */

:root {
  /* pdfmerge workspace tokens: tonal zones instead of extra hues */
  --zone-bg: color-mix(in srgb, var(--surface-color) 70%, var(--bg-color));
  --desk-bg: #dfe4eb;
  --files-desk-bg: #e4e9ef;
  --file-thumbnail-well-bg: #edf0f4;
  --file-card-shadow: 0 2px 8px rgb(17 24 39 / 12%), 0 10px 24px rgb(17 24 39 / 6%);
  --control-height: 36px;
  --control-font-size: 0.9rem;
  --card-paper-shadow: 0 1px 2px rgb(15 23 42 / 18%), 0 4px 10px rgb(15 23 42 / 10%);
}

[data-theme="dark"] {
  --zone-bg: color-mix(in srgb, var(--surface-color) 82%, var(--bg-color));
  --desk-bg: #111317;
  --files-desk-bg: #171a1f;
  --file-thumbnail-well-bg: #191d23;
  --file-card-shadow: 0 2px 10px rgb(0 0 0 / 35%);
  --card-paper-shadow: 0 1px 2px rgb(0 0 0 / 50%), 0 6px 14px rgb(0 0 0 / 35%);
}

/* ---------- Files zone ---------- */

#drop-area.has-files {
  padding: 0.75rem 0.85rem 0.85rem;
  border-style: solid;
  border-color: var(--card-shell-border);
  background: var(--files-desk-bg);
  text-align: left;
}

#drop-area.has-files:hover {
  transform: none;
  box-shadow: none;
  background: var(--files-desk-bg);
}

#drop-area.has-files #file-upload-label {
  position: absolute;
  top: 0.75rem;
  right: 0.85rem;
  z-index: 2;
  min-height: 44px;
  padding: 0 0.9rem;
  font-size: var(--control-font-size);
}

#drop-area.has-files .sort-files-control {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  min-height: 44px;
  margin: 0 0 0.75rem;
  padding-right: 9.5rem;
}

.files-title {
  margin: 0 auto 0 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--zone-header-color);
}

.files-summary {
  margin-left: 0.5rem;
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--font-color-2);
}

.sort-files-control label {
  font-size: 0.85rem;
  color: var(--font-color-2);
}

/* ---------- File cards ---------- */

#selected-files-list {
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 224px), 1fr));
  grid-auto-rows: auto;
  gap: 1rem;
  align-items: stretch;
  justify-items: start;
  place-content: start;
}

#selected-files-list li,
li.is-dragging {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto max-content auto auto 1fr;
  align-content: start;
  gap: 0.75rem;
  width: 100%;
  max-width: 320px;
  min-height: 0;
  padding: 0.75rem;
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-panel);
  box-shadow: var(--file-card-shadow);
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

#selected-files-list li:hover {
  border-color: var(--border-color);
  box-shadow: var(--file-card-shadow), 0 3px 10px rgb(17 24 39 / 8%);
  transform: translateY(-1px);
}

[data-theme="dark"] #selected-files-list li {
  background: var(--surface-color);
  border-color: var(--border-color);
  box-shadow: var(--file-card-shadow);
}

[data-theme="dark"] #selected-files-list li:hover {
  border-color: var(--border-color);
  box-shadow: var(--file-card-shadow), 0 3px 10px rgb(0 0 0 / 30%);
}

#selected-files-list li .file-info-container,
li.is-dragging .file-info-container,
#selected-files-list li .card-body,
li.is-dragging .card-body {
  display: contents;
}

#selected-files-list li .card-header,
li.is-dragging .card-header {
  position: absolute;
  inset: 0.5rem 0.5rem auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  z-index: 2;
}

#selected-files-list li .card-meta,
#selected-files-list li .card-meta-top-row,
li.is-dragging .card-meta,
li.is-dragging .card-meta-top-row {
  display: flex;
  align-items: center;
  gap: 0;
  min-width: 0;
}

#selected-files-list li .order-number,
li.is-dragging .order-number {
  min-width: 44px;
  height: 44px;
  padding: 0;
  border-radius: var(--radius-control);
  background: transparent;
  color: #fff;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.78rem;
  font-weight: 700;
  border: none;
  position: relative;
  isolation: isolate;
}

#selected-files-list li .order-number::before,
li.is-dragging .order-number::before {
  content: "";
  position: absolute;
  inset: 8px;
  z-index: -1;
  border-radius: var(--radius-control);
  background: var(--color-blue-1);
}

#selected-files-list li .order-number:hover::before {
  background: var(--color-blue-2);
}

#selected-files-list li .order-number:active::before {
  background: var(--color-blue-3);
}

#selected-files-list li .file-type-badge,
li.is-dragging .file-type-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 28px;
  margin: 0;
  padding: 0 0.5rem;
  border-radius: var(--radius-control);
  font-size: 0.68rem;
  line-height: 1;
  background: var(--surface-color);
  color: var(--font-color);
  border: 1px solid var(--border-color);
  box-shadow: none;
}

#selected-files-list li .file-type-badge.pdf,
#selected-files-list li .file-type-badge.image,
li.is-dragging .file-type-badge.pdf,
li.is-dragging .file-type-badge.image {
  background: var(--surface-color);
}

#selected-files-list li .orientation-badge[hidden],
li.is-dragging .orientation-badge[hidden] {
  display: none;
}

#selected-files-list li .card-thumbnail-wrapper,
li.is-dragging .card-thumbnail-wrapper {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  min-height: 150px;
  max-height: none;
  padding: 0.75rem;
  border-radius: var(--radius-control);
  border: 1px solid var(--border-color);
  background: var(--file-thumbnail-well-bg);
}

#selected-files-list li .card-thumbnail-frame,
li.is-dragging .card-thumbnail-frame {
  max-width: none;
}

#selected-files-list li .card-thumbnail-page,
li.is-dragging .card-thumbnail-page {
  width: 100%;
  height: 100%;
}

#selected-files-list li .card-thumbnail-surface {
  box-shadow: var(--card-paper-shadow);
}

#selected-files-list li .file-name,
li.is-dragging .file-name {
  display: block;
  min-width: 0;
  max-height: none;
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.875rem;
  line-height: 1.25rem;
  font-weight: 500;
  text-align: left;
}

#selected-files-list li .blank-page-card,
li.is-dragging .blank-page-card {
  min-height: 0;
  padding: 0;
  font-style: normal;
}

#selected-files-list li .card-top-meta,
li.is-dragging .card-top-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
  margin: 0;
  padding: 0;
  font-size: 0.75rem;
  line-height: 1rem;
  color: var(--font-color-2);
  font-variant-numeric: tabular-nums;
}

#selected-files-list li .card-top-meta > * + *::before,
li.is-dragging .card-top-meta > * + *::before {
  content: "·";
  margin-right: 0.375rem;
}

#selected-files-list li .card-top-meta .file-size,
#selected-files-list li .card-top-meta .file-pages {
  font-size: inherit;
  line-height: inherit;
}

#selected-files-list li .card-footer,
li.is-dragging .card-footer {
  align-self: end;
  min-width: 0;
  padding-top: 0.75rem;
  border-top: 1px solid var(--card-shell-border);
}

/* Blank-page cards have no meta or per-file control. */
#selected-files-list li .card-top-meta:empty,
#selected-files-list li .card-footer:empty {
  display: none;
}

#selected-files-list li .pdf-page-range-label,
#selected-files-list li .image-layout-card-label {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.375rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--font-color-2);
  text-align: left;
}

#selected-files-list li .card-footer .pdf-page-range-input,
#selected-files-list li .card-footer .image-layout-card-select {
  width: 100%;
  max-width: none;
  min-width: 0;
  min-height: 44px;
  margin: 0;
  padding: 0 0.5rem;
  font-size: 0.85rem;
  text-align: left;
}

#selected-files-list li .card-footer .image-layout-card-select {
  padding-right: 1.75rem;
}

#selected-files-list li .rotation-controls,
li.is-dragging .rotation-controls {
  align-self: start;
  justify-self: end;
  display: flex;
  gap: 0.5rem;
  margin: 0;
}

#selected-files-list li .rotation-controls button,
li.is-dragging .rotation-controls button {
  width: 44px;
  height: 44px;
  margin: 0;
  padding: 0;
  border-radius: var(--radius-control);
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  box-shadow: none;
  color: var(--font-color);
}

#selected-files-list li .rotation-controls button .icon,
li.is-dragging .rotation-controls button .icon {
  width: 1.25rem;
  height: 1.25rem;
  font-size: 1.25rem;
  stroke: currentColor;
  stroke-width: 2;
}

#selected-files-list li .rotation-controls button:hover {
  border-color: var(--focus-color);
  background: var(--surface2-color);
}

#selected-files-list li .rotation-controls .delete-file-button:hover,
#selected-files-list li .rotation-controls .delete-file-button:focus-visible {
  background: var(--color-red-2);
  color: var(--color-white);
  border-color: var(--color-red-2);
}

@supports not (aspect-ratio: 4 / 3) {
  #selected-files-list li .card-thumbnail-wrapper {
    height: 168px;
  }
}

/* ---------- Settings zone ---------- */

.settings-notice {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  padding: 0.5rem 0.5rem 0.5rem 1rem;
  border: 1px solid var(--card-shell-border);
  border-left: 3px solid var(--color-blue-1);
  border-radius: var(--radius-panel);
  background: var(--surface-color);
}

.settings-notice[hidden] {
  display: none;
}

.settings-notice-text {
  flex: 1 1 14rem;
  margin: 0;
  font-size: 0.85rem;
  color: var(--font-color-2);
}

.settings-notice-text strong {
  color: var(--font-color);
  font-weight: 600;
}

.settings-notice .button {
  min-height: 44px;
  margin: 0;
}

.settings-layout {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--card-shell-border);
}

.settings-section > summary .settings-title {
  color: var(--zone-header-color);
}

.output-preview .settings-content {
  background: var(--desk-bg);
  border-radius: 0 0 var(--radius-panel) var(--radius-panel);
}

.output-preview-pages {
  background: transparent;
}

.output-preview-page canvas {
  cursor: zoom-in;
}

.output-viewer[open] {
  box-sizing: border-box;
  position: fixed;
  inset: 0;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: 100vw;
  max-width: none;
  height: 100vh;
  height: 100dvh;
  max-height: none;
  margin: 0;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  border: 0;
  background: var(--desk-bg);
  color: var(--font-color);
}

.output-viewer::backdrop {
  background: var(--desk-bg);
}

.output-viewer-header,
.output-viewer-toolbar {
  display: flex;
  align-items: center;
  background: var(--surface-color);
}

.output-viewer-header {
  justify-content: space-between;
  min-height: 52px;
  padding: 0.25rem 1rem;
  border-bottom: 1px solid var(--card-shell-border);
  font-weight: 600;
}

.output-viewer-toolbar {
  justify-content: space-between;
  gap: 0.75rem;
  min-height: 60px;
  padding: 0.5rem 1rem;
  border-top: 1px solid var(--card-shell-border);
}

.output-viewer-control-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}

.output-viewer-control {
  display: inline-grid;
  place-items: center;
  flex: none;
  min-width: 44px;
  min-height: 44px;
  padding: 0.4rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--surface-color);
  color: var(--font-color);
  font: inherit;
  cursor: pointer;
}

.output-viewer-control:disabled {
  background: var(--button-disabled-bg-color);
  color: var(--button-disabled-font-color);
  cursor: not-allowed;
}

.output-viewer-control:focus-visible,
.output-viewer-scroll:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

.output-viewer-fit {
  padding-inline: 0.75rem;
}

.output-viewer-readout {
  min-width: 3.5rem;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.85rem;
}

.output-viewer-scroll {
  min-width: 0;
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  touch-action: pan-x pan-y;
  -webkit-overflow-scrolling: touch;
}

.output-viewer-scroll.is-zoomed {
  cursor: grab;
}

.output-viewer-scroll.is-dragging {
  cursor: grabbing;
}

.output-viewer-page {
  box-sizing: border-box;
  display: grid;
  place-items: center;
  width: max-content;
  min-width: 100%;
  min-height: 100%;
  padding: 1rem;
}

.output-viewer-page canvas {
  display: block;
  flex: none;
  background: #fff;
  box-shadow: 0 4px 14px rgb(0 0 0 / 20%);
}

.output-viewer-status {
  margin: 0;
  padding: 1rem;
  text-align: center;
  color: var(--font-color-2);
}

@media (max-width: 600px) {
  .output-viewer-toolbar {
    flex-wrap: nowrap;
    justify-content: center;
    gap: 0.25rem;
    padding: 0.5rem 0.25rem;
    overflow-x: auto;
  }

  .output-viewer-control-group {
    flex: none;
    width: auto;
    gap: 0.25rem;
  }

  .output-viewer-readout {
    min-width: 0;
    white-space: nowrap;
    font-size: 0.75rem;
  }

  .output-viewer-fit {
    padding-inline: 0.4rem;
  }
}

/* Compact controls sized to their content */
.settings-content input[type="text"],
.settings-content input[type="number"],
.settings-content select {
  height: var(--control-height);
  min-height: 0;
  padding: 0 0.6rem;
  font-size: var(--control-font-size);
}

.settings-content input[type="number"] {
  width: 6.5rem;
}

.settings-content select {
  width: auto;
  min-width: 9rem;
  max-width: 100%;
}

.settings-content label {
  font-size: 0.85rem;
}

.settings-content input[type="color"] {
  width: 44px;
  height: var(--control-height);
  padding: 2px;
}

/* Watermark controls in a tidy grid */
.watermark-group {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(13rem, 1fr));
  gap: 0.9rem 1.25rem;
  align-items: end;
}

.watermark-group[style*="none"] {
  display: none !important;
}

.watermark-item {
  display: grid;
  gap: 0.3rem;
  align-items: start;
}

.watermark-item label {
  margin: 0;
}

.watermark-item.watermark-text-input-item,
.watermark-image-only.watermark-file-item,
.watermark-descriptions {
  grid-column: 1 / -1;
}

.watermark-item input[type="text"] {
  width: 100%;
}

/* Sliders */
.range-control {
  min-width: 11rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.range-control input[type="range"] {
  flex: 1;
  min-width: 0;
  height: var(--control-height);
  margin: 0;
  accent-color: var(--color-blue-1);
  cursor: pointer;
}

.range-control input[type="range"]:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

.range-value {
  min-width: 3.6rem;
  text-align: right;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: var(--font-color);
}

/* ---------- Action bar ---------- */

#output-filename-container {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--card-shell-border);
}

#output-filename-container input {
  height: 44px;
  font-size: var(--control-font-size);
}

/* ---------- Template help dialog ---------- */

.template-help-open {
  justify-self: start;
  min-height: 32px;
  margin-top: 0.4rem;
  padding: 0 0.7rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--surface-color);
  color: var(--color-blue-text);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
}

/* A modal dialog does not stop the page behind it scrolling on iOS. */
html:has(dialog[open]) {
  overflow: hidden;
}

.template-help-dialog {
  width: min(40rem, calc(100% - 1.75rem));
  max-height: min(calc(100dvh - 2.5rem), 44rem);
  margin: auto;
  padding: 0;
  overflow: auto;
  overscroll-behavior: contain;
  border: 1px solid var(--card-shell-border);
  border-radius: var(--radius-surface);
  background: var(--surface-color);
  color: var(--font-color);
  box-shadow: 0 24px 60px rgb(0 0 0 / 30%);
}

.template-help-dialog::backdrop {
  background: rgb(15 23 42 / 45%);
}

.template-help-header {
  position: sticky;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--card-shell-border);
  background: var(--surface-color);
  /* Above scrolled token buttons, which iOS otherwise paints over it. */
  z-index: 1;
}

.template-help-header h2 {
  margin: 0;
  font-size: 1.05rem;
}

/* The heading takes focus only to open the dialog at the top; it is not a control. */
.template-help-header h2:focus {
  outline: none;
}

.template-help-actions {
  position: sticky;
  bottom: 0;
  z-index: 1;
  display: flex;
  justify-content: flex-end;
  padding: 0.75rem;
  padding-bottom: max(0.75rem, env(safe-area-inset-bottom));
  border-top: 1px solid var(--card-shell-border);
  background: var(--surface-color);
}

.template-help-actions .button {
  min-height: 44px;
  margin: 0;
  padding: 0 1.25rem;
}

.template-help-body {
  padding: 0.5rem 1rem 1rem;
  font-size: 0.88rem;
  /* The {hash} sample is one unbroken token; without this the dialog scrolls sideways. */
  overflow-wrap: anywhere;
}

.template-help-intro {
  margin: 0.5rem 0;
  color: var(--font-color-2);
}

.template-help-heading {
  margin: 1rem 0 0.25rem;
  font-size: 0.95rem;
  color: var(--zone-header-color);
}

.template-help-list,
.template-help-dates {
  display: grid;
  gap: 0.35rem;
  margin: 0.5rem 0 0;
  padding: 0;
  list-style: none;
}

.template-help-list li {
  display: grid;
  grid-template-columns: minmax(9rem, max-content) minmax(0, 1fr);
  align-items: center;
  gap: 0.75rem;
  color: var(--font-color-2);
}

.template-help-list li[hidden] {
  display: none;
}

.template-help-token {
  justify-self: start;
  min-height: 30px;
  padding: 0 0.55rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--zone-bg);
  color: var(--font-color);
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  cursor: pointer;
}

.template-help-token:hover {
  border-color: var(--color-blue-1);
}

.template-help-open:focus-visible,
.template-help-token:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

.template-help-dates {
  grid-template-columns: repeat(auto-fill, minmax(10rem, 1fr));
  color: var(--font-color-2);
}

.template-help-dates code {
  font-family: "JetBrains Mono", monospace;
  color: var(--font-color);
}

@media (max-width: 640px) {
  .template-help-list li {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.2rem;
  }
}

/* ---------- Tighter workspace spacing ---------- */

.tool-surface:has(#drop-area.has-files) {
  padding: 1rem;
}

.settings-accordion {
  gap: 0.5rem;
}

.settings-section > summary {
  min-height: 42px;
  padding: 0.5rem 0.85rem;
}

.settings-content {
  padding: 0.75rem 0.85rem 0.85rem;
}

.settings-content .toggle-item {
  margin: 0 0 0.5rem;
}

.settings-content .toggle-item label {
  margin-left: 0;
}

.paper-size-item label {
  font-size: 0.82rem;
  color: var(--font-color-2);
}

.text-options-panel,
.watermark-group {
  margin: 0.5rem 0 0;
}

@media (max-width: 640px) {
  .tool-surface:has(#drop-area.has-files) {
    padding: 0.75rem;
  }
}

#selected-files-list li .card-body .pdf-page-range-input::placeholder {
  font-size: 0.85rem;
}

.template-help-dialog .template-help-list li {
  margin: 0;
  padding: 0;
}

.template-help-dialog button.template-help-token {
  min-height: 28px;
  height: auto;
  margin: 0;
  padding: 0.15rem 0.55rem;
}

/* Touch targets on tablets, which miss the 640px phone rules. */
@media (pointer: coarse) {
  .template-help-dialog button.template-help-token {
    min-height: 44px;
  }
}

.template-help-dialog .template-help-header {
  padding: 0.5rem 0.75rem 0.5rem 1rem;
}

/* ---------- Colour fields ---------- */

.color-field {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.settings-content .color-field input[type="color"] {
  width: 36px;
  height: 36px;
  padding: 3px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--surface-color);
  cursor: pointer;
}

.color-field input[type="color"]::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-field input[type="color"]::-webkit-color-swatch {
  border: none;
  border-radius: calc(var(--radius-control) - 2px);
}

.color-field input[type="color"]::-moz-color-swatch {
  border: none;
  border-radius: calc(var(--radius-control) - 2px);
}

.color-field input[type="color"]:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

.color-hex {
  min-width: 4.6rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.8rem;
  color: var(--font-color-2);
}

.color-presets {
  display: inline-flex;
  gap: 0.3rem;
}

.color-preset {
  width: 22px;
  height: 22px;
  min-height: 0;
  padding: 0;
  border: 1px solid color-mix(in srgb, var(--font-color) 25%, transparent);
  border-radius: var(--radius-round);
  background: var(--preset-color);
  cursor: pointer;
}

.color-preset[aria-pressed="true"] {
  outline: 2px solid var(--color-blue-1);
  outline-offset: 2px;
}

.color-preset:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

/* ---------- Alignment fixes ---------- */

#selected-files-list li .card-header button:focus-visible,
#selected-files-list li .rotation-controls button:focus-visible {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

#drop-area.has-files .sort-files-control select {
  height: 44px;
  padding: 0 2rem 0 0.7rem;
  font-size: var(--control-font-size);
}

.output-preview-nav .output-preview-step {
  width: 36px;
  height: 36px;
  min-height: 0;
  padding: 0;
}

.output-preview-nav #output-preview-enlarge {
  width: 44px;
  height: 44px;
}

.output-preview-nav .output-preview-goto input[type="number"] {
  width: 4.25rem;
  height: var(--control-height);
  min-height: 0;
  padding: 0 0.4rem;
}

.output-preview-nav {
  justify-content: center;
  gap: 0.75rem;
}

.settings-content input[type="file"] {
  max-width: 100%;
  font-size: var(--control-font-size);
  color: var(--font-color-2);
}

.settings-content input[type="file"]::file-selector-button {
  height: var(--control-height);
  margin-right: 0.6rem;
  padding: 0 0.85rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--surface-color);
  color: var(--font-color);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}

.settings-content input[type="file"]::file-selector-button:hover {
  border-color: var(--color-blue-1);
}

.range-value {
  min-width: 3.2rem;
}

#selected-files-list li .card-body .pdf-page-range-label {
  width: 100%;
  max-width: none;
}

/* ---------- Settings fields: aligned grid, typed slider values ---------- */

.watermark-group {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1.5rem;
  align-items: start;
}

.watermark-group .watermark-tiled-item,
.watermark-group .watermark-file-item,
.watermark-group .watermark-text-input-item,
.watermark-group .watermark-descriptions {
  grid-column: 1 / -1;
}

.watermark-item > label,
.text-line-field > label,
.page-number-field > label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--font-color-2);
}

.range-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.6rem;
  min-width: 0;
  width: 100%;
}

.range-value {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  min-width: 0;
  font-family: inherit;
  color: var(--font-color-2);
  font-size: 0.8rem;
}

.settings-content .range-value input.range-number {
  flex: 0 0 4.6rem;
  width: 4.6rem;
  height: 32px;
  padding: 0 0.4rem;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.82rem;
  text-align: right;
}

/* A fixed unit column keeps sliders and number boxes aligned whether the
   unit is %, mm, a symbol, or empty. */
.range-unit {
  align-self: center;
  min-width: 1.75rem;
  line-height: 1;
}

/* File chooser styled like the app's secondary buttons */
.file-picker {
  position: relative;
  display: inline-flex;
}

.file-picker-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.file-picker-button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  height: var(--control-height);
  padding: 0 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--surface-color);
  color: var(--font-color);
  font-size: var(--control-font-size);
  font-weight: 600;
  cursor: pointer;
}

.watermark-item .file-picker-button {
  margin: 0;
  font-size: var(--control-font-size);
  color: var(--font-color);
}

.file-picker-button:hover {
  border-color: var(--color-blue-1);
}

.file-picker-input:focus-visible + .file-picker-button {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

@media (max-width: 640px) {
  .watermark-group {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* Text appearance: colour gets its own row; box and margin share the next. */
.text-options-panel .text-appearance-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem 1.5rem;
  align-items: start;
}

.text-options-panel .text-appearance-row > :first-child {
  grid-column: 1 / -1;
}

.text-options-panel .text-appearance-row > *,
.text-options-panel .text-line-field {
  min-width: 0;
}

.text-options-panel .text-box-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem 1rem;
  padding-top: 1.35rem;
}

.text-options-panel .text-box-controls .toggle-item {
  margin: 0;
}

.text-options-panel .text-option-skip {
  margin: 0.25rem 0 0;
}

@media (max-width: 640px) {
  .text-options-panel .text-appearance-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .text-options-panel .text-box-controls {
    padding-top: 0;
  }
}

/* ---------- Action bar: one primary action, quiet secondary ones ---------- */

.output-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  gap: 1rem;
}

.output-filename-field {
  flex: 1 1 28rem;
  max-width: 32rem;
  min-width: 0;
}

#output-filename-container label {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--font-color-2);
}

.tool-actions {
  flex: 1 1 28rem;
  justify-content: flex-end;
  gap: 0.6rem;
}

.tool-actions .button {
  min-height: 44px;
  padding: 0 1.1rem;
  font-size: 0.92rem;
}

.tool-actions .button.secondary,
.settings-notice .button.secondary,
.template-help-actions .button.secondary {
  background: var(--surface-color);
  border: 1px solid var(--border-color);
  color: var(--font-color);
  box-shadow: none;
}

.tool-actions .button.secondary:hover,
.settings-notice .button.secondary:hover,
.template-help-actions .button.secondary:hover {
  border-color: var(--color-blue-1);
  transform: none;
}

.tool-actions .button.secondary:active,
.settings-notice .button.secondary:active {
  background: var(--accent-dim);
  color: var(--font-color);
  box-shadow: none;
}

.tool-actions .button.secondary:disabled {
  background: var(--button-disabled-bg-color);
  color: var(--button-disabled-font-color);
  border-color: var(--border-color);
}

/* The merge action sits apart on the right, larger than the rest. */
.tool-actions #convert-button {
  margin-left: auto;
  height: 44px;
  padding: 0 1.75rem;
  font-size: 1rem;
  font-weight: 700;
}

@media (max-width: 640px) {
  .output-filename-field,
  .tool-actions {
    flex-basis: 100%;
    max-width: none;
  }

  .tool-actions #convert-button { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) {
  #selected-files-list li,
  #output-filename,
  .tool-actions .button {
    transition: none;
  }
}

/* ---------- Segmented control ---------- */

.segmented-control {
  display: inline-flex;
  padding: 3px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--zone-bg);
}

.segmented-control input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
  pointer-events: none;
}

.watermark-item .segmented-control label {
  display: inline-flex;
  flex: 1;
  align-items: center;
  justify-content: center;
  height: 30px;
  margin: 0;
  padding: 0 1rem;
  border-radius: calc(var(--radius-control) - 2px);
  color: var(--font-color-2);
  font-size: var(--control-font-size);
  font-weight: 600;
  cursor: pointer;
  user-select: none;
}

.segmented-control input[type="radio"]:checked + label {
  background: var(--color-blue-1);
  color: #fff;
}

.segmented-control input[type="radio"]:focus-visible + label {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}

.watermark-item select[hidden] {
  display: none;
}

/* Full-bleed cover images need no paper behind them; a white frame would
 * show through the anti-aliased edge as a light seam. */
#selected-files-list li[data-image-layout="cover"] .card-thumbnail-surface,
#selected-files-list li[data-image-layout="cover-rotated"] .card-thumbnail-surface {
  background: transparent;
}

/* Phone controls keep 16px text to avoid Safari's focus zoom. */
@media (max-width: 640px) {
  :root {
    --control-height: 44px;
    --control-font-size: 16px;
  }

  #drop-area.has-files {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 0.65rem 0.5rem;
  }

  #drop-area.has-files #file-list,
  #drop-area.has-files .sort-files-control {
    display: contents;
  }

  #drop-area.has-files .files-title {
    grid-column: 1 / -1;
    grid-row: 1;
    margin: 0;
  }

  #drop-area.has-files .sort-files-control > label {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
    white-space: nowrap;
  }

  #drop-area.has-files .sort-files-control select {
    grid-column: 1;
    grid-row: 2;
    width: 100%;
    min-width: 0;
    padding: 0 0.4rem;
  }

  #drop-area.has-files #file-upload-label {
    position: static;
    grid-column: 2;
    grid-row: 2;
    margin: 0;
    padding: 0 0.5rem;
  }

  #selected-files-list {
    grid-column: 1 / -1;
    grid-row: 3;
  }

  #selected-files-list li {
    max-width: none;
  }

  #selected-files-list li .rotation-controls button {
    width: 44px;
    height: 44px;
    margin: 0;
  }

  #selected-files-list li .card-footer .pdf-page-range-input,
  #selected-files-list li .card-footer .image-layout-card-select {
    min-width: 0;
    height: var(--control-height);
    font-size: 16px;
    padding-left: 0.35rem;
    padding-right: 0.35rem;
  }

  #selected-files-list li .card-footer .image-layout-card-select {
    padding-right: 1.4rem;
    background-position: calc(100% - 12px) calc(50% - 2px), calc(100% - 6px) calc(50% - 2px);
  }

  .settings-content input[type="text"],
  .settings-content input[type="number"],
  .settings-content select,
  #output-filename-container input {
    min-width: 0;
    height: var(--control-height);
    padding: 0 0.6rem;
    font-size: 16px;
  }

  .settings-content select {
    width: 100%;
  }

  /* Watermark visibility uses inline display: flex when enabled. */
  .watermark-group {
    flex-direction: column;
    align-items: stretch;
  }

  .settings-content .watermark-description {
    margin-inline: 0;
  }

  .settings-content .toggle-item label,
  .watermark-tiled-item label {
    justify-content: flex-start;
    gap: 10px;
  }

  .settings-content .switch {
    margin-right: 0;
  }

  .settings-content .range-value input.range-number {
    width: 4.6rem;
    height: var(--control-height);
    margin: 0;
    padding: 0 0.4rem;
    font-size: 16px;
  }

  .settings-section > summary {
    min-height: 44px;
    gap: 0.5rem;
  }

  .output-preview-nav {
    display: grid;
    grid-template-columns: 44px minmax(0, 1fr) 44px 44px;
    gap: 0.4rem;
  }

  .output-preview-nav .output-preview-step {
    width: 44px;
    height: 44px;
  }

  .output-preview-nav .output-preview-goto input[type="number"] {
    width: 3.5rem;
  }

  .output-preview-goto {
    min-width: 0;
    flex-wrap: wrap;
    justify-content: center;
  }

  .color-presets {
    flex-wrap: wrap;
  }

  .tool-actions .button,
  .output-preview-nav .output-preview-step,
  .color-preset {
    margin: 0;
  }

  .template-help-open {
    margin: 0.4rem 0 0;
  }

  .watermark-item .segmented-control label {
    height: 36px;
    padding: 0 0.5rem;
  }

  .template-help-open {
    min-height: 44px;
  }

  .template-help-dialog button.template-help-token {
    min-height: 44px;
  }
}

@media (max-width: 360px) {
  #drop-area.has-files .sort-files-control select {
    grid-column: 1 / -1;
  }

  #drop-area.has-files #file-upload-label {
    grid-column: 1 / -1;
    grid-row: 3;
  }

  #selected-files-list {
    grid-row: 4;
  }
}

/* ---------- Text style toggles (bold, italic, underline) ---------- */

.text-appearance-row > .text-style-field {
  grid-column: 1 / -1;
}

.text-style-field {
  display: grid;
  gap: 0.375rem;
}

.text-style-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--font-color-2);
}

.text-style-group {
  display: flex;
  gap: 0.375rem;
}

.text-style-option {
  position: relative;
  display: inline-flex;
}

.text-style-option input {
  position: absolute;
  inset: 0;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.text-style-glyph {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-control);
  background: var(--surface-color);
  color: var(--font-color);
  font-size: 1rem;
  font-weight: 400;
  pointer-events: none;
}

.text-style-bold { font-weight: 700; }
.text-style-italic { font-style: italic; font-family: Georgia, "Times New Roman", serif; }
.text-style-underline { text-decoration: underline; text-underline-offset: 3px; }

.text-style-option:hover .text-style-glyph {
  border-color: var(--color-blue-1);
}

.text-style-option input:checked + .text-style-glyph {
  border-color: var(--color-blue-1);
  background: var(--color-blue-1);
  color: var(--color-white);
}

.text-style-option input:focus-visible + .text-style-glyph {
  outline: 2px solid var(--focus-color);
  outline-offset: 2px;
}