/* ============================================
   api_sign — App-specific styles
   ============================================ */

/* --- Background & Layout --- */
body {
  background: linear-gradient(135deg, #2c5171 0%, #4682b4 50%, #6a9bc3 100%);
  min-height: 100vh;
}

/* --- Navbar --- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 48px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.08);
}

.navbar-title {
  font-family: var(--pibico-font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  background: var(--pibico-grad-banner);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.navbar-nav {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
}

.navbar-nav .nav-link {
  font-family: var(--pibico-font-button);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--pibico-steel-blue);
  padding: 4px 10px;
  border-radius: var(--pibico-radius-xs);
  transition: background 0.2s;
}

.navbar-nav .nav-link:hover {
  background: var(--pibico-steel-pale);
}

.btn-icon {
  background: none;
  border: none;
  color: var(--pibico-grey-dark);
  cursor: pointer;
  padding: 6px;
  border-radius: var(--pibico-radius-xs);
  display: flex;
  align-items: center;
  transition: background 0.2s, color 0.2s;
}

.btn-icon:hover {
  background: var(--pibico-steel-pale);
  color: var(--pibico-steel-blue);
}

/* --- Footer --- */
.app-footer {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  height: 32px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  font-size: 0.75rem;
  color: var(--pibico-grey-dark);
  box-shadow: 0 -1px 8px rgba(0, 0, 0, 0.06);
}

.app-footer a {
  color: var(--pibico-steel-blue);
  font-weight: 500;
}

.footer-separator {
  color: var(--pibico-grey-mid);
}

/* --- Main Content --- */
.app-main {
  margin-top: 60px;
  margin-bottom: 44px;
  padding: 0 20px;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Step Card --- */
.step-card {
  background: var(--pibico-white);
  border-radius: var(--pibico-radius);
  padding: 16px 20px;
  box-shadow: var(--pibico-card-shadow);
  margin-bottom: 14px;
}

.step-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.step-number {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--pibico-grad-primary);
  color: var(--pibico-white);
  font-family: var(--pibico-font-heading);
  font-weight: 700;
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.step-title {
  font-family: var(--pibico-font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--pibico-near-black);
}

/* --- Image Zones (Step 1) --- */
.image-zones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.image-zone {
  background: var(--pibico-light-grey);
  border-radius: var(--pibico-radius-sm);
  padding: 12px;
}

.zone-label {
  font-family: var(--pibico-font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--pibico-grey-dark);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* --- Mode Toggle (Upload/Draw) --- */
.mode-toggle {
  display: flex;
  gap: 0;
  margin-bottom: 10px;
  background: var(--pibico-white);
  border-radius: var(--pibico-radius-xs);
  overflow: hidden;
}

.mode-btn {
  flex: 1;
  padding: 5px 0;
  border: none;
  background: transparent;
  font-family: var(--pibico-font-button);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--pibico-grey-dark);
  cursor: pointer;
  transition: all 0.2s;
}

.mode-btn.active {
  background: var(--pibico-steel-blue);
  color: var(--pibico-white);
}

/* --- Dropzone --- */
.dropzone {
  border: 2px dashed var(--pibico-grey-mid);
  border-radius: var(--pibico-radius-sm);
  padding: 16px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s;
  min-height: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--pibico-white);
}

.dropzone:hover,
.dropzone.dragover {
  border-color: var(--pibico-steel-blue);
  background: var(--pibico-steel-pale);
}

.dropzone svg {
  color: var(--pibico-grey-mid);
}

.dropzone span {
  font-size: 0.78rem;
  color: var(--pibico-grey-dark);
}

.dropzone-preview {
  max-width: 100%;
  max-height: 80px;
  object-fit: contain;
  border-radius: 4px;
}

.dropzone-actions {
  display: flex;
  gap: 6px;
  margin-top: 6px;
}

/* --- Canvas (Draw mode) --- */
.canvas-container {
  background: var(--pibico-white);
  border-radius: var(--pibico-radius-sm);
  overflow: hidden;
}

#signatureCanvas {
  width: 100%;
  height: 140px;
  cursor: crosshair;
  display: block;
  touch-action: none;
}

.canvas-tools {
  display: flex;
  gap: 6px;
  padding: 6px 8px;
  background: var(--pibico-light-grey);
  border-radius: 0 0 var(--pibico-radius-sm) var(--pibico-radius-sm);
}

.canvas-tool-btn {
  padding: 4px 10px;
  border: none;
  border-radius: var(--pibico-radius-xs);
  background: var(--pibico-white);
  font-family: var(--pibico-font-button);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--pibico-grey-dark);
  cursor: pointer;
  transition: all 0.2s;
}

.canvas-tool-btn:hover {
  background: var(--pibico-steel-pale);
  color: var(--pibico-steel-blue);
}

.canvas-tool-btn.active {
  background: var(--pibico-steel-blue);
  color: var(--pibico-white);
}

/* --- PDF Preview & Grid (Step 2) --- */
.pdf-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pdf-upload-row {
  display: flex;
  gap: 12px;
  align-items: stretch;
}

.pdf-dropzone {
  flex: 1;
}

.preview-wrapper {
  position: relative;
  display: inline-block;
  margin: 0 auto;
  max-width: 100%;
}

.preview-wrapper img {
  display: block;
  max-width: 100%;
  height: auto;
  border-radius: var(--pibico-radius-sm);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

/* --- Grid Overlay --- */
.grid-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(12, 1fr);
  pointer-events: auto;
}

.grid-cell {
  border: 1px solid rgba(70, 130, 180, 0.15);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--pibico-font-button);
  font-size: 0.7rem;
  font-weight: 700;
  color: transparent;
  transition: all 0.15s;
  user-select: none;
}

.grid-cell:hover {
  background: rgba(70, 130, 180, 0.12);
  border-color: rgba(70, 130, 180, 0.3);
}

.grid-cell.blocked {
  cursor: not-allowed;
  opacity: 0.5;
}

.grid-cell.has-signature {
  background: rgba(70, 130, 180, 0.25);
  border-color: var(--pibico-steel-blue);
  color: var(--pibico-steel-blue);
}

.grid-cell.has-stamp {
  background: rgba(179, 58, 43, 0.2);
  border-color: var(--pibico-red-brick);
  color: var(--pibico-red-brick);
}

.grid-cell.has-cert {
  background: rgba(34, 139, 34, 0.2);
  border-color: #228b22;
  color: #228b22;
}

.grid-cell.has-sig-stamp {
  background: linear-gradient(135deg, rgba(70, 130, 180, 0.25) 50%, rgba(179, 58, 43, 0.2) 50%);
  border-color: var(--pibico-steel-dark);
  color: var(--pibico-near-black);
  font-size: 0.6rem;
}

.grid-cell.has-sig-cert {
  background: linear-gradient(135deg, rgba(70, 130, 180, 0.25) 50%, rgba(34, 139, 34, 0.2) 50%);
  border-color: var(--pibico-steel-dark);
  color: var(--pibico-near-black);
  font-size: 0.6rem;
}

.grid-cell.has-stamp-cert {
  background: linear-gradient(135deg, rgba(179, 58, 43, 0.2) 50%, rgba(34, 139, 34, 0.2) 50%);
  border-color: var(--pibico-near-black);
  color: var(--pibico-near-black);
  font-size: 0.6rem;
}

.grid-cell.has-all {
  background: linear-gradient(135deg, rgba(70, 130, 180, 0.25) 33%, rgba(179, 58, 43, 0.2) 33%, rgba(179, 58, 43, 0.2) 66%, rgba(34, 139, 34, 0.2) 66%);
  border-color: var(--pibico-near-black);
  color: var(--pibico-near-black);
  font-size: 0.55rem;
}

/* --- Page Controls --- */
.page-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.page-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.page-nav-btn {
  width: 28px;
  height: 28px;
  border: none;
  border-radius: var(--pibico-radius-xs);
  background: var(--pibico-light-grey);
  color: var(--pibico-grey-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.page-nav-btn:hover:not(:disabled) {
  background: var(--pibico-steel-pale);
  color: var(--pibico-steel-blue);
}

.page-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.page-info {
  font-size: 0.8rem;
  color: var(--pibico-grey-dark);
  font-weight: 500;
}

.page-selector {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}

.page-selector label {
  font-size: 0.8rem;
  color: var(--pibico-grey-dark);
  font-weight: 500;
}

.page-option {
  padding: 4px 10px;
  border: none;
  border-radius: var(--pibico-radius-xs);
  background: var(--pibico-light-grey);
  font-family: var(--pibico-font-button);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--pibico-grey-dark);
  cursor: pointer;
  transition: all 0.2s;
}

.page-option.active {
  background: var(--pibico-steel-blue);
  color: var(--pibico-white);
}

.page-option:hover:not(.active) {
  background: var(--pibico-steel-pale);
}

.custom-pages-input {
  width: 80px;
  padding: 4px 8px;
  font-size: 0.8rem;
}

/* --- Action Bar (Step 3) --- */
.action-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  justify-content: center;
}

.btn-sign {
  font-family: var(--pibico-font-button);
  font-weight: 600;
  font-size: 0.9rem;
  padding: 10px 28px;
  border: none;
  border-radius: var(--pibico-radius-sm);
  background: var(--pibico-grad-primary);
  color: var(--pibico-white);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(70, 130, 180, 0.3);
}

.btn-sign:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(70, 130, 180, 0.4);
}

.btn-sign:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.btn-download {
  font-family: var(--pibico-font-button);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 8px 20px;
  border: none;
  border-radius: var(--pibico-radius-sm);
  background: var(--pibico-steel-blue);
  color: var(--pibico-white);
  cursor: pointer;
  display: none;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
}

.btn-download:hover {
  background: var(--pibico-steel-dark);
}

.btn-download.visible {
  display: inline-flex;
}

/* --- Spinner --- */
.spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: var(--pibico-white);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.spinner.active {
  display: inline-block;
}

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

/* --- Status Bar --- */
.status-bar {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--pibico-radius-xs);
  margin-bottom: 10px;
  display: none;
}

.status-bar.success {
  display: block;
  background: rgba(46, 160, 67, 0.12);
  color: #1a7f37;
}

.status-bar.error {
  display: block;
  background: rgba(179, 58, 43, 0.12);
  color: var(--pibico-red-brick);
}

/* --- Settings Panel Sections --- */
.panel-section {
  margin-bottom: 16px;
}

.panel-section-title {
  font-family: var(--pibico-font-heading);
  font-weight: 600;
  font-size: 0.85rem;
  color: var(--pibico-grey-dark);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.btn-save {
  width: 100%;
  padding: 8px;
  border: none;
  border-radius: var(--pibico-radius-sm);
  background: var(--pibico-grad-primary);
  color: var(--pibico-white);
  font-family: var(--pibico-font-button);
  font-weight: 600;
  font-size: 0.85rem;
  cursor: pointer;
  transition: opacity 0.2s;
}

.btn-save:hover {
  opacity: 0.9;
}

/* --- Legend --- */
.grid-legend {
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: 0.75rem;
  color: var(--pibico-grey-dark);
  margin-top: 8px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

.legend-swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.legend-swatch.sig {
  background: rgba(70, 130, 180, 0.25);
  border: 1px solid var(--pibico-steel-blue);
}

.legend-swatch.stamp {
  background: rgba(179, 58, 43, 0.2);
  border: 1px solid var(--pibico-red-brick);
}

.legend-swatch.cert {
  background: rgba(34, 139, 34, 0.2);
  border: 1px solid #228b22;
}

/* --- Certificate Zone --- */
.cert-zone {
  margin-top: 14px;
  background: var(--pibico-light-grey);
  border-radius: var(--pibico-radius-sm);
  padding: 12px;
}

.cert-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cert-dropzone {
  min-height: 64px;
}

.cert-fields {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cert-fields .pibico-input {
  font-size: 0.8rem;
  padding: 6px 10px;
}

.cert-hint {
  font-size: 0.68rem;
  color: var(--pibico-grey-mid);
  line-height: 1.2;
}

/* --- Seal Picker --- */
.seal-picker {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 4px;
}

.seal-picker-label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--pibico-grey-dark);
  font-family: var(--pibico-font-heading);
  flex-shrink: 0;
}

.seal-options {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.seal-option {
  width: 40px;
  height: 40px;
  border: 2px solid transparent;
  border-radius: var(--pibico-radius-xs);
  background: var(--pibico-white);
  cursor: pointer;
  padding: 3px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.seal-option:hover {
  border-color: var(--pibico-grey-mid);
}

.seal-option.active {
  border-color: var(--pibico-steel-blue);
  background: var(--pibico-steel-pale);
}

.seal-option img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.seal-option svg {
  color: var(--pibico-grey-mid);
}

.seal-option-upload {
  border-style: dashed;
  border-color: var(--pibico-grey-mid);
}

.seal-option-upload:hover {
  border-color: var(--pibico-steel-blue);
}

.seal-option-upload.active {
  border-style: solid;
}

/* --- Placement Mode Selector --- */
.placement-mode {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
}

.placement-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--pibico-grey-dark);
  font-family: var(--pibico-font-heading);
}

.placement-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  border: 2px solid transparent;
  border-radius: var(--pibico-radius-xs);
  background: var(--pibico-light-grey);
  font-family: var(--pibico-font-button);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--pibico-grey-dark);
  cursor: pointer;
  transition: all 0.2s;
}

.placement-btn:hover {
  background: var(--pibico-steel-pale);
}

.placement-btn.active[data-mode="signature"] {
  border-color: var(--pibico-steel-blue);
  background: rgba(70, 130, 180, 0.1);
  color: var(--pibico-steel-blue);
}

.placement-btn.active[data-mode="stamp"] {
  border-color: var(--pibico-red-brick);
  background: rgba(179, 58, 43, 0.1);
  color: var(--pibico-red-brick);
}

.placement-btn.active[data-mode="cert"] {
  border-color: #228b22;
  background: rgba(34, 139, 34, 0.1);
  color: #228b22;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .image-zones {
    grid-template-columns: 1fr;
  }

  .cert-row {
    grid-template-columns: 1fr;
  }

  .app-main {
    padding: 0 10px;
  }

  .page-selector {
    margin-left: 0;
    flex-wrap: wrap;
  }

  .placement-mode {
    flex-wrap: wrap;
  }
}