html, body {
  margin: 0;
  padding: 0;
  font-family: Georgia, serif;
  background: #eef1f4;
  color: #222;
  -webkit-user-select: none;
  user-select: none;
}

body {
  padding-top: 120px;
}

.viewer-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: #0d47a1;
  color: #fff;
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 14px;
  z-index: 9999;
  box-shadow: 0 4px 14px rgba(0,0,0,0.16);
}

.viewer-title-wrap {
  min-width: 0;
}

.viewer-title-wrap h1 {
  margin: 0;
  font-size: 20px;
  line-height: 1.3;
}

.viewer-title-wrap p {
  margin: 4px 0 0;
  font-size: 13px;
  opacity: 0.9;
}

.header-btn {
  border: none;
  background: rgba(255,255,255,0.15);
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: bold;
  cursor: pointer;
  flex-shrink: 0;
}

.viewer-toolbar {
  position: fixed;
  top: 74px;
  left: 0;
  right: 0;
  background: #ffffff;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 16px;
  z-index: 9998;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  font-size: 14px;
  font-weight: bold;
}

.toolbar-item {
  color: #333;
}

.loading-box {
  max-width: 900px;
  margin: 18px auto;
  background: #fff;
  border-radius: 14px;
  padding: 16px;
  text-align: center;
  box-shadow: 0 6px 14px rgba(0,0,0,0.08);
  font-weight: bold;
  color: #0d47a1;
}

.pdf-container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 10px 40px;
}

.pdf-page-wrap {
  position: relative;
  margin: 18px auto;
  background: #fff;
  border-radius: 14px;
  padding: 10px;
  box-shadow: 0 8px 18px rgba(0,0,0,0.1);
  overflow: hidden;
}

.pdf-page-canvas {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  height: auto;
  pointer-events: none;
}

.page-label {
  text-align: center;
  margin-top: 10px;
  font-size: 13px;
  color: #555;
  font-weight: bold;
}

.watermark {
  position: fixed;
  pointer-events: none;
  font-size: 24px;
  font-weight: bold;
  color: rgba(0,0,0,0.08);
  transform: rotate(-28deg);
  z-index: 9997;
}

.watermark-1 {
  top: 32%;
  left: 8%;
}

.watermark-2 {
  top: 65%;
  right: 8%;
}

@media (max-width: 700px) {
  body {
    padding-top: 128px;
  }

  .viewer-header {
    padding: 12px;
    gap: 10px;
  }

  .viewer-title-wrap h1 {
    font-size: 17px;
  }

  .viewer-toolbar {
    font-size: 13px;
    padding: 10px 12px;
  }

  .watermark {
    font-size: 18px;
  }
}