body {
  margin: 0;
  background: #fefefe;
  font-family: Consolas, SFMono-Regular, Liberation Mono, Menlo, monospace;
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;
  padding-bottom: 30px;
}

#drop_area {
  display: flex;
  flex-direction: column;
  border: 2px dashed tomato;
  border-radius: 10px;
  padding: 20px;
  margin: 20px;
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
  width: 300px;
  text-align: center;
}

#drop_area.dragover {
  background-color: rgba(255, 99, 71, 0.1);
  border-color: tomato;
}

#pdf_input {
  display: none;
}

#pdf_container {
  width: 90%;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.pdf-block {
  border: 1px solid #ccc;
  border-radius: 5px;
  padding: 10px;
}

.pdf-block-loading {
  position: relative;
  pointer-events: none;
}

.pdf-loader-block {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  flex-direction: column-reverse;
  gap: 10px;
  width: 100%;
  height: 100%;
  justify-content: center;
  align-items: center;
  background: #263038cc;
  color: white;
  font-weight: bold;
  z-index: 100;
}

.loader {
  width: 30px;
  height: 30px;
  border: 3px solid #fff;
  border-bottom-color: transparent;
  border-radius: 50%;
  display: inline-block;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

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

.pdf-name {
  font-weight: bold;
  flex: 1;
}

.pdf-range {
  display: flex;
  align-items: center;
  gap: 5px;
}

.pdf-pages {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.pdf-page {
  border: 1px solid #ccc;
  border-radius: 5px;
  width: 300px;
  height: auto;
  overflow: hidden;
}
.pdf-page canvas {
  width: 100%;
  display: block;
}

button.compress-btn {
  margin-top: 20px;
  display: block;
  width: 100%;
  padding: 10px;
  border-radius: 5px;
  border: 1px solid #ccc;
  cursor: pointer;
  transition: box-shadow 0.2s, transform 0.2s;
  font-family: inherit;
}

button.compress-btn:hover {
  box-shadow: 0px 1px 7px 1px rgba(255, 99, 71, 0.25);
  transform: translateY(-0.75px);
}

button.compress-btn.loading {
  animation: loading 2s infinite;
}

@keyframes loading {
  0% {
    border: 2px solid #4285f4;
    color: #4285f4;
    box-shadow: 0px 1px 10px 1px rgba(66, 133, 244, 0.5);
  }
  33% {
    border: 2px solid #db4437;
    color: #db4437;
    box-shadow: 0px 1px 10px 1px rgba(219, 68, 55, 0.5);
  }
  66% {
    border: 2px solid #f4b400;
    color: #f4b400;
    box-shadow: 0px 1px 10px 1px rgba(244, 160, 0, 0.5);
  }
  100% {
    border: 2px solid #0f9d58;
    color: #0f9d58;
    box-shadow: 0px 1px 10px 1px rgba(15, 157, 88, 0.5);
  }
}

.pdf-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 10px;
}

.compress-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  padding: 5px;
}

.compress-label {
  font-weight: bold;
  margin-bottom: 5px;
  text-align: center;
}

.pdf-preview {
  margin: 10px 0;
  text-align: center;
}

.pdf-preview img {
  max-width: 100%;
  max-height: 400px;
  border: 1px solid #ccc;
  border-radius: 4px;
}

.pdf-sync-scroll {
  display: flex;
  gap: 10px;
  max-height: 600px;
  overflow: auto;
  border: 1px solid #ddd;
  margin-top: 10px;
}

.pdf-side img {
  display: block;
  margin: 0 auto 10px;
  border: 1px solid #eee;
  max-width: 100%;
}

.pdf-side {
  display: flex;
  flex-direction: column;
  align-items: center;
  overflow-y: auto;
}

.pdf-label {
  font-weight: bold;
  text-align: center;
  background: #f8f8f8;
  padding: 6px 10px;
  width: 100%;
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid #ddd;
}