:root { --maxw: 1180px; }

[hidden] { display: none !important; }

body { overflow-x: hidden; }

#drop-zone {
  border: 2px dashed var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 44px 20px;
  text-align: center;
  color: var(--fg-muted);
  background: var(--white);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
}

#drop-zone:hover,
#drop-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

#drop-zone strong {
  color: var(--fg);
  display: block;
  font-size: 17px;
  margin-bottom: 4px;
}

#editor {
  display: none;
  margin-top: 22px;
}

#editor.active { display: block; }

.editor-top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 12px;
}

.editor-top h2 {
  margin-top: 0;
  margin-bottom: 4px;
}

.editor-actions {
  margin: 0;
  justify-content: flex-end;
}

.sign-primary {
  background: var(--green);
  color: var(--white);
  border: 1px solid var(--green);
  box-shadow: var(--shadow-sm);
}

.sign-primary:hover {
  background: var(--green-hover);
  color: var(--white);
  border-color: var(--green-hover);
}

.toolbar {
  background: var(--black);
  border-radius: var(--radius);
  padding: 10px;
  margin: 14px 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  position: sticky;
  top: 8px;
  z-index: 10;
}

.tool-btn {
  background: transparent;
  color: #cbd5e1;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  min-height: 40px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--transition), color var(--transition);
}

.tool-btn:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  box-shadow: none;
}

.tool-btn.active {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
}

.tool-btn:disabled {
  background: transparent;
  color: rgba(203, 213, 225, 0.35);
  border-color: transparent;
}

.tool-sep {
  width: 1px;
  height: 26px;
  background: rgba(255, 255, 255, 0.14);
  margin: 0 4px;
}

.toolbar-field {
  color: #cbd5e1;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  font-size: 13px;
  font-weight: 600;
}

.toolbar-field input[type="color"] {
  width: 42px;
  min-width: 42px;
  min-height: 38px;
  height: 38px;
  padding: 2px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.22);
}

.toolbar-field input[type="number"] {
  width: 64px;
  min-height: 38px;
  padding: 6px 8px;
}

.toolbar-field.compact { gap: 5px; }

.signature-strip {
  background: var(--green-soft);
  border: 1px solid rgba(16, 185, 129, 0.28);
  border-left: 4px solid var(--green);
  border-radius: var(--radius);
  padding: 12px;
  margin: 0 0 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.signature-strip strong {
  display: block;
  margin-bottom: 2px;
}

.signature-strip-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.signature-strip-actions button {
  min-height: 40px;
  padding: 8px 12px;
}

.signature-panel {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px;
  margin-bottom: 14px;
  display: grid;
  grid-template-columns: 340px 1fr;
  gap: 16px;
  align-items: start;
}

.signature-preview-wrap {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 8px;
  background:
    linear-gradient(45deg, #eef2f7 25%, transparent 25%),
    linear-gradient(-45deg, #eef2f7 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #eef2f7 75%),
    linear-gradient(-45deg, transparent 75%, #eef2f7 75%);
  background-size: 18px 18px;
  background-position: 0 0, 0 9px, 9px -9px, -9px 0;
}

#signature-preview {
  width: 100%;
  height: auto;
  background: transparent;
}

.signature-controls label {
  margin-top: 0;
}

.inline-check {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.editor-shell {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-sidebar {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  max-height: 720px;
  overflow: auto;
}

.sidebar-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--fg-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.page-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-btn {
  width: 100%;
  background: var(--white);
  color: var(--fg);
  border: 1px solid var(--border);
  box-shadow: none;
  justify-content: space-between;
  padding: 9px 10px;
  min-height: 42px;
  border-radius: var(--radius-sm);
}

.page-btn:hover {
  background: var(--off-white);
  color: var(--fg);
  border-color: var(--border-strong);
  box-shadow: none;
}

.page-btn.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

.edited-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: transparent;
  display: inline-block;
  flex: 0 0 auto;
}

.page-btn.edited .edited-dot { background: var(--green); }

.page-workspace {
  min-width: 0;
}

.page-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 10px;
  flex-wrap: wrap;
}

.page-status {
  min-width: 120px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.zoom-controls {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.zoom-controls button {
  min-height: 40px;
  padding: 8px 12px;
}

.zoom-label {
  min-width: 52px;
  text-align: center;
  color: var(--fg-muted);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.canvas-scroller {
  overflow: auto;
  background: var(--off-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  -webkit-overflow-scrolling: touch;
}

.page-stage {
  position: relative;
  margin: 0 auto;
  background: var(--white);
  box-shadow: var(--shadow-lg);
  touch-action: pan-x pan-y;
  user-select: none;
}

.page-stage canvas {
  max-width: none;
}

#pdf-canvas {
  display: block;
  position: relative;
  z-index: 1;
  background: var(--white);
  pointer-events: none;
}

#edit-canvas {
  display: block;
}

.page-stage .canvas-container {
  position: absolute !important;
  left: 0 !important;
  top: 0 !important;
  z-index: 3;
  max-width: none !important;
  pointer-events: auto;
  touch-action: none;
}

.page-stage .canvas-container canvas {
  left: 0 !important;
  top: 0 !important;
  max-width: none !important;
}

.page-stage .lower-canvas {
  pointer-events: none;
}

.page-stage .upper-canvas {
  pointer-events: auto;
  touch-action: none;
}

#msg {
  min-height: 22px;
  margin-top: 10px;
}

@media (max-width: 820px) {
  .editor-top {
    display: block;
  }

  .editor-actions {
    justify-content: flex-start;
    margin-top: 12px;
  }

  .editor-actions button {
    flex: 1 1 180px;
  }

  .signature-panel {
    grid-template-columns: 1fr;
  }

  .signature-strip {
    align-items: stretch;
  }

  .signature-strip-actions {
    width: 100%;
  }

  .signature-strip-actions button {
    flex: 1 1 150px;
  }

  .editor-shell {
    grid-template-columns: 1fr;
  }

  .page-sidebar {
    max-height: none;
  }

  .page-list {
    flex-direction: row;
    overflow-x: auto;
    padding-bottom: 4px;
  }

  .page-btn {
    min-width: 110px;
  }

  .canvas-scroller {
    padding: 8px;
  }
}

@media (max-width: 520px) {
  header.site-header .wrap {
    display: block;
  }

  header.site-header nav {
    margin-top: 10px;
  }

  header.site-header nav a {
    padding: 6px 8px;
    font-size: 13px;
  }

  .toolbar {
    top: 0;
    margin-left: -16px;
    margin-right: -16px;
    border-radius: 0;
    padding: 8px;
    gap: 6px;
    max-height: 44vh;
    overflow-y: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
  }

  .tool-btn {
    width: 100%;
    min-width: 0;
    min-height: 44px;
    padding: 8px;
  }

  .toolbar-field {
    grid-column: span 2;
    display: grid;
    grid-template-columns: minmax(0, 1fr) 74px;
    justify-content: stretch;
  }

  .toolbar-field input[type="color"],
  .toolbar-field input[type="number"] {
    justify-self: end;
  }

  .tool-sep {
    display: none;
  }

  .editor-actions button {
    flex: 1 1 100%;
  }

  .signature-strip-actions button {
    flex: 1 1 100%;
  }

  .page-controls button {
    flex: 1 1 120px;
  }

  .page-status {
    order: -1;
    flex: 1 1 100%;
  }

  .zoom-controls {
    flex: 1 1 100%;
  }

  .zoom-controls button {
    flex: 1 1 120px;
  }
}