/* =============================================
   TOOL PAGES - Professional paper/stamp interface
   ============================================= */

.tool-page {
  flex: 1;
  width: 100%;
  padding-bottom: var(--s-20);
}

.tool-hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: start;
  gap: var(--s-8);
  padding: var(--s-12) 0 var(--s-10);
  margin-bottom: var(--s-8);
  border-bottom: 1px solid var(--line);
}

.tool-hero-content {
  display: contents;
}

.tool-hero-left {
  min-width: 0;
}

.tool-breadcrumb,
.tool-hero nav,
.tool-hero nav a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.tool-breadcrumb,
.tool-hero nav {
  margin-bottom: var(--s-4);
}

.tool-hero nav a:hover,
.tool-breadcrumb a:hover {
  color: var(--stamp);
}

.tool-title,
.tool-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.35rem, 5vw, 3.8rem);
  font-weight: 500;
  line-height: 1.05;
  letter-spacing: 0;
  color: var(--ink);
  margin-bottom: var(--s-3);
}

.tool-description,
.tool-hero p {
  max-width: 680px;
  color: var(--ink-soft);
  font-size: 1.06rem;
}

.tool-privacy-badge {
  grid-column: 2;
  grid-row: 1 / span 3;
  width: 118px;
  height: 118px;
  border: 2px solid var(--stamp);
  border-radius: 50%;
  outline: 1px solid var(--stamp);
  outline-offset: -7px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--stamp);
  font-family: var(--font-mono);
  font-size: 0;
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: 0.06em;
  text-align: center;
  text-transform: uppercase;
  transform: rotate(-11deg);
  mix-blend-mode: multiply;
}

.tool-privacy-badge::before {
  content: "100% LOCAL PROCESSING";
  max-width: 80px;
  font-size: 0.68rem;
}

.tool-stage {
  max-width: 1040px;
  margin: 0 auto;
}

.stage-view {
  display: none;
}

.stage-view.active {
  display: block;
  background: var(--card);
  border: 1.5px solid var(--line-strong);
  border-radius: 4px;
  box-shadow: 6px 6px 0px var(--line);
  padding: var(--s-8);
}

.stage-view > h2,
.result-card h2,
.success-banner h2 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.55rem, 3vw, 2rem);
  margin-bottom: var(--s-3);
}

.stage-view > p,
.result-card p,
.privacy-microcopy,
.privacy-note,
.privacy-microcopy,
.privacy-note {
  color: var(--ink-soft);
}

.privacy-microcopy,
.privacy-note {
  margin-top: var(--s-4);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
  text-align: center;
}

.dropzone-container {
  position: relative;
  display: flex;
  min-height: 280px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-3);
  padding: var(--s-12) var(--s-6);
  background: var(--bg-page);
  border: 2px dashed var(--line-strong);
  border-radius: 4px;
  cursor: pointer;
  text-align: center;
  transition: all 0.2s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.dropzone-container::before {
  content: "PDF";
  display: grid;
  place-items: center;
  width: 54px;
  height: 66px;
  margin-bottom: var(--s-2);
  border: 1.5px solid var(--line-strong);
  background: var(--paper);
  color: var(--stamp);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  box-shadow: 4px 4px 0 var(--line);
  transition: all 0.2s ease;
}

.dropzone-container p {
  max-width: 36ch;
  color: var(--ink);
  font-weight: 500;
}

.dropzone-container:hover,
.dropzone-container.dragover {
  border-color: var(--stamp);
  border-style: solid;
  background: rgba(163, 53, 43, 0.03);
  box-shadow: 6px 6px 0px rgba(163, 53, 43, 0.15);
  transform: translate(-3px, -3px);
}

.dropzone-container:hover::before,
.dropzone-container.dragover::before {
  transform: rotate(-6deg) scale(1.1);
  box-shadow: 6px 6px 0 rgba(163, 53, 43, 0.2);
  border-color: var(--stamp);
  background: rgba(163, 53, 43, 0.08);
}

.file-input-hidden,
.dropzone-container input[type="file"] {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  cursor: pointer;
}

.stamp-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 82px;
  height: 82px;
  margin-bottom: var(--s-4);
  border: 1.5px solid var(--stamp);
  border-radius: 50%;
  color: var(--stamp);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-align: center;
  text-transform: uppercase;
  transform: rotate(-8deg);
}

.options-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: var(--s-6);
}

.options-box,
.options-panel,
.control-group,
.form-field,
.warning,
.warning-banner,
.success-banner,
.result-card,
.processing-indicator {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: var(--s-5);
}

.options-box + .options-box,
.control-group + .control-group,
.form-field + .form-field {
  margin-top: var(--s-4);
}

.warning,
.warning-banner {
  border-left: 4px solid var(--stamp);
  color: var(--ink);
  background: #F6E8DE;
  margin-bottom: var(--s-5);
}

.form-label {
  display: block;
  margin: var(--s-4) 0 var(--s-2);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.form-label input,
.form-label select {
  margin-top: var(--s-2);
}

.form-control,
.form-select,
.form-input,
.input,
input[type="number"],
input[type="text"],
input[type="password"],
select,
textarea {
  width: 100%;
  max-width: 100%;
  min-height: 42px;
  border: 1.5px solid var(--line-strong);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  padding: 0.58rem 0.72rem;
  box-shadow: inset 2px 2px 0px rgba(0,0,0,0.03); /* Analog inset feel */
  transition: all 0.2s ease;
}

.form-control:focus,
.form-select:focus,
.form-input:focus,
.input:focus,
input[type="text"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--stamp);
  box-shadow: inset 2px 2px 0px rgba(163, 53, 43, 0.05), 0 0 0 3px rgba(163, 53, 43, 0.15);
}

input[type="checkbox"],
input[type="radio"] {
  width: auto;
  min-height: 0;
  accent-color: var(--stamp);
}

input[type="range"] {
  width: 100%;
  accent-color: var(--stamp);
  margin: var(--s-3) 0 var(--s-5);
}

.preset-buttons,
.actions,
.result-actions,
.page-controls,
.toolbar,
.viewer-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--s-2);
}

.preset-buttons {
  margin: var(--s-4) 0;
}

.actions,
.result-actions {
  margin-top: var(--s-5);
}

.btn {
  border-radius: 3px;
}

.btn-sm {
  min-width: 38px;
  min-height: 34px;
  padding: 0.35rem 0.55rem;
  font-size: 0.82rem;
}

.processing-indicator,
.stage-view[id*="processing"].active {
  text-align: center;
}

.spinner,
.processing-spinner {
  width: 42px;
  height: 42px;
  margin: 0 auto var(--s-5);
  border: 3px solid var(--line);
  border-top-color: var(--stamp);
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
}

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

.merge-list,
.pages-grid,
.thumbnail-grid {
  display: grid;
  gap: var(--s-4);
  margin: var(--s-6) 0;
}

.pages-grid,
.thumbnail-grid {
  grid-template-columns: repeat(auto-fill, minmax(142px, 1fr));
}

.merge-item {
  display: grid;
  grid-template-columns: auto 56px minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--s-4);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: var(--s-3);
}

.merge-item-drag {
  color: var(--line-strong);
  cursor: grab;
  font-family: var(--font-mono);
  font-weight: 700;
}

.merge-item-thumb {
  width: 56px;
  height: 74px;
  object-fit: cover;
  background: var(--paper);
  border: 1px solid var(--line-strong);
}

.merge-item-info {
  display: flex;
  min-width: 0;
  flex-direction: column;
}

.merge-item-title {
  overflow: hidden;
  color: var(--ink);
  font-weight: 600;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.merge-item-pages {
  color: var(--ink-soft);
  font-size: 0.84rem;
}

.merge-item.dragging,
.page-thumb.dragging {
  opacity: 0.55;
}

.page-thumb,
.thumb-item {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: var(--s-3);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.16s ease, transform 0.16s ease, box-shadow 0.16s ease;
}

.page-thumb:hover,
.thumb-item:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
  box-shadow: 0 14px 24px -22px rgba(28, 36, 48, 0.45);
}

.page-thumb.selected,
.thumb-item.selected {
  border-color: var(--stamp);
  box-shadow: 0 0 0 1px var(--stamp);
}

.page-thumb img,
.page-thumb canvas,
.thumb-canvas-wrapper canvas {
  max-width: 100%;
  height: auto;
  background: var(--paper);
  border: 1px solid var(--line);
}

.img-wrapper,
.thumb-canvas-wrapper {
  display: grid;
  place-items: center;
  min-height: 130px;
  background: var(--paper);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-num,
.thumb-label {
  margin-top: var(--s-2);
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.toolbar,
.viewer-toolbar {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: var(--s-3);
  margin-bottom: var(--s-4);
}

.toolbar button.active,
.signature-tab.active {
  border-color: var(--stamp);
  color: var(--stamp);
  background: rgba(163, 53, 43, 0.08);
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  max-height: 70vh;
  overflow: auto;
  padding-right: var(--s-2);
}

.thumbnail {
  width: 96px;
  border: 1px solid var(--line);
  border-radius: 3px;
  cursor: pointer;
  background: var(--paper);
}

.thumbnail.active {
  border-color: var(--stamp);
  box-shadow: 0 0 0 1px var(--stamp);
}

.signature-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s-2);
  margin-bottom: var(--s-3);
}

.signature-tab {
  border: 1px solid var(--line-strong);
  border-radius: 3px;
  padding: 0.5rem 0.8rem;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

.signature-panel {
  display: none;
}

.signature-panel.active {
  display: block;
}

#signature-canvas,
#type-canvas,
#page-canvas,
#pdf-canvas,
#render-canvas,
.compare-canvas,
canvas[id^="canvas-"] {
  max-width: 100%;
  background: var(--paper);
  border: 1px solid var(--line);
}

.preview-container,
#preview-container {
  position: relative;
  display: inline-block;
  max-width: 100%;
  margin-top: var(--s-4);
}

#signature-overlay {
  position: absolute;
  top: var(--s-4);
  left: var(--s-4);
  border: 1px dashed var(--stamp);
  cursor: move;
  background: rgba(251, 251, 248, 0.72);
}

#signature-overlay img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
}

#resize-handle,
.resize-handle {
  position: absolute;
  right: -6px;
  bottom: -6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--stamp);
  cursor: nwse-resize;
}

.toast-container {
  position: fixed;
  right: var(--s-4);
  bottom: var(--s-4);
  z-index: 1000;
  display: grid;
  gap: var(--s-2);
  max-width: min(360px, calc(100vw - 2rem));
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 4px solid var(--ink-soft);
  border-radius: 3px;
  box-shadow: 0 16px 28px -18px rgba(28, 36, 48, 0.45);
  padding: var(--s-3) var(--s-4);
}

.toast-success { border-left-color: var(--verify); }
.toast-error { border-left-color: var(--stamp); }

#diff-output {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: var(--s-4);
  overflow-wrap: anywhere;
}

#diff-output ins {
  background: #DDEBDD;
  text-decoration: none;
}

#diff-output del {
  background: #F3D8D3;
}

.mt-2 { margin-top: var(--s-2); }
.mt-3 { margin-top: var(--s-3); }
.mt-4 { margin-top: var(--s-4); }
.mb-2 { margin-bottom: var(--s-2); }

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 840px) {
  .tool-hero {
    grid-template-columns: 1fr;
  }

  .tool-privacy-badge {
    grid-column: auto;
    grid-row: auto;
    width: 88px;
    height: 88px;
  }

  .tool-privacy-badge::before {
    font-size: 0.58rem;
    max-width: 64px;
  }

  .stage-view.active {
    padding: var(--s-5);
  }

  .options-layout {
    grid-template-columns: 1fr;
  }

  .merge-item {
    grid-template-columns: auto 48px minmax(0, 1fr);
  }

  .merge-item-actions {
    grid-column: 1 / -1;
  }
}