.lec-pdf-app {
  position: relative;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  box-sizing: border-box;
  overflow: visible;
  border: 1px solid #c7c7c7;
  background: #d9d9d9;
}

.lec-pdf-app + .lec-pdf-app {
  margin-top: 24px;
}

.lec-pdf-toolbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  width: 100%;
  padding: 10px;
  box-sizing: border-box;
  background: #202124;
  color: #fff;
  box-shadow: 0 2px 7px rgba(0, 0, 0, 0.25);
}

.lec-toolbar-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.lec-pdf-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid #555;
  border-radius: 5px;
  background: #333 !important;
  color: #fff !important;
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none !important;
  white-space: nowrap;
  cursor: pointer;
  transition:
    background-color 0.15s ease,
    border-color 0.15s ease;
}

.lec-pdf-button:hover,
.lec-pdf-button:focus-visible {
  background: #4a4a4a !important;
  border-color: #777;
  color: #fff !important;
}

.lec-pdf-button:focus-visible {
  outline: 2px solid #fff;
  outline-offset: 2px;
}

.lec-pdf-button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.lec-pdf-button[hidden] {
  display: none;
}

.lec-zoom-display {
  min-width: 92px;
}

.lec-page-control {
  display: flex;
  align-items: center;
  gap: 6px;
  color: #fff;
  font-size: 14px;
  white-space: nowrap;
}

.lec-page-control label {
  margin: 0;
  color: inherit;
  font-size: inherit;
}

.lec-page-control input {
  width: 55px;
  height: 38px;
  margin: 0;
  padding: 5px;
  box-sizing: border-box;
  border: 1px solid #666;
  border-radius: 4px;
  background: #fff;
  color: #111;
  font-size: 15px;
  text-align: center;
}

.lec-page-control input:disabled {
  opacity: 0.65;
}

.lec-pdf-viewer {
  width: 100%;
  min-height: 500px;
  padding: 12px;
  box-sizing: border-box;
  overflow-x: auto;
  background: #d9d9d9;
}

.lec-pdf-page {
  display: flex;
  justify-content: center;
  width: max-content;
  min-width: 100%;
  margin: 0 auto 16px;
  scroll-margin-top: 75px;
}

.lec-pdf-page:last-child {
  margin-bottom: 0;
}

.lec-pdf-page canvas {
  display: block;
  max-width: none;
  background: #fff;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.22);
}

.lec-pdf-message {
  padding: 60px 20px;
  color: #222;
  font-size: 16px;
  text-align: center;
}

.lec-pdf-error-button {
  display: inline-block;
  margin-top: 15px;
  padding: 12px 20px;
  border-radius: 5px;
  background: #333 !important;
  color: #fff !important;
  text-decoration: none !important;
}

.lec-pdf-app:fullscreen {
  width: 100%;
  max-width: none;
  height: 100vh;
  border: 0;
  background: #d9d9d9;
  overflow: auto;
}

.lec-pdf-app:fullscreen .lec-pdf-toolbar {
  top: 0;
}

@media (max-width: 767px) {
  .lec-pdf-toolbar {
    justify-content: center;
    padding: 7px;
    gap: 6px;
  }

  .lec-toolbar-group {
    gap: 4px;
  }

  .lec-pdf-button {
    min-height: 36px;
    padding: 7px 10px;
  }

  .lec-button-label {
    display: none;
  }

  .lec-page-control label {
    display: none;
  }

  .lec-page-control input {
    width: 48px;
    height: 36px;
  }

  .lec-zoom-display {
    min-width: 75px;
  }

  .lec-pdf-viewer {
    min-height: 400px;
    padding: 5px;
  }

  .lec-pdf-page {
    margin-bottom: 8px;
    scroll-margin-top: 125px;
  }
}

/*
 * Printing: only the viewer marked as the print target is printed
 * (set by the Print button, or automatically when the page has one viewer).
 */
@media print {
  @page {
    margin: 0.35in;
  }

  body.lec-pdf-printing * {
    visibility: hidden !important;
  }

  body.lec-pdf-printing .lec-pdf-print-target,
  body.lec-pdf-printing .lec-pdf-print-target * {
    visibility: visible !important;
  }

  body.lec-pdf-printing .lec-pdf-print-target {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    width: 100% !important;
    max-width: none !important;
    margin: 0 !important;
    padding: 0 !important;
    border: 0 !important;
    background: #fff !important;
    overflow: visible !important;
  }

  .lec-pdf-toolbar {
    display: none !important;
  }

  .lec-pdf-viewer {
    min-height: 0 !important;
    padding: 0 !important;
    background: #fff !important;
    overflow: visible !important;
  }

  .lec-pdf-page {
    display: block !important;
    width: 100% !important;
    min-width: 0 !important;
    margin: 0 !important;
    break-after: page;
    page-break-after: always;
  }

  .lec-pdf-page:last-child {
    break-after: auto;
    page-break-after: auto;
  }

  .lec-pdf-page canvas {
    width: 100% !important;
    height: auto !important;
    box-shadow: none !important;
  }
}