html.siai-pdf-lock,
body.siai-pdf-lock {
  overflow: hidden !important;
  overscroll-behavior: none;
}

.siai-pdf-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2147483000;
  background: #e7e8ea;
  color: #111;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-tap-highlight-color: transparent;
}

.siai-pdf-overlay.is-open { display: block; }

.siai-pdf-shell {
  position: absolute;
  inset: 0;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
}

.siai-pdf-toolbar {
  min-height: 64px;
  padding: max(8px, env(safe-area-inset-top))
           max(10px, env(safe-area-inset-right))
           8px
           max(10px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.98);
  border-bottom: 1px solid rgba(0,0,0,.09);
  box-shadow: 0 1px 8px rgba(0,0,0,.08);
}

.siai-pdf-close {
  appearance: none;
  width: 46px;
  height: 46px;
  padding: 0 0 3px;
  border: 0;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #111;
  color: #fff;
  font-size: 30px;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
}

.siai-pdf-titlebox { min-width: 0; text-align: center; }

.siai-pdf-title {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 15px;
  font-weight: 650;
}

.siai-pdf-pageinfo {
  min-height: 15px;
  margin-top: 2px;
  font-size: 12px;
  opacity: .62;
}

.siai-pdf-open {
  min-height: 42px;
  padding: 0 12px;
  border: 1px solid rgba(0,0,0,.14);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #111 !important;
  background: #fff;
  text-decoration: none !important;
  font-size: 13px;
  font-weight: 650;
}

.siai-pdf-status {
  padding: 9px 14px;
  text-align: center;
  font-size: 14px;
  background: #fff7cf;
  border-bottom: 1px solid rgba(0,0,0,.08);
}

.siai-pdf-status.is-error { background: #fff0f0; }

.siai-pdf-pages {
  min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  padding: 14px max(8px, env(safe-area-inset-right))
           calc(24px + env(safe-area-inset-bottom))
           max(8px, env(safe-area-inset-left));
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  outline: none;
}

.siai-pdf-page {
  flex: 0 0 auto;
  background: #fff;
  box-shadow: 0 3px 18px rgba(0,0,0,.18);
}

.siai-pdf-page canvas {
  display: block;
  max-width: none !important;
}

@media (max-width: 600px) {
  .siai-pdf-toolbar { min-height: 58px; gap: 7px; }
  .siai-pdf-close { width: 42px; height: 42px; font-size: 28px; }
  .siai-pdf-title { font-size: 13px; }
  .siai-pdf-open { min-height: 40px; padding: 0 9px; font-size: 12px; }
}