/* BlueScroll Viewer – FULL CSS (centered pages, no cropping, accurate counter) */

/* Theme variables */
:root {
  --bsv-bg: #ffffff;
  --bsv-surface: #ffffff;
  --bsv-surface-2: #ffffff;
  --bsv-pill-color: #000;
  --bsv-brand: #4b9eff;
  --bsv-brand-2: #86c2ff;
  --bsv-text: #e6f0ff;
  --bsv-muted: #fff;
  --bsv-outline: #ffffff;
  --bsv-shadow: 0 10px 30px rgba(255, 255, 255, 0.35);
  --bsv-radius-xl: 20px;
  --bsv-radius-lg: 14px;

  /* zoom (set by JS) */
  --bsv-zoom: 1;
}

/* Root widget */
.bsv {
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--bsv-text);
  background: linear-gradient(180deg, var(--bsv-bg), #4051b5);
  border: 1px solid var(--bsv-outline);
  border-radius: var(--bsv-radius-xl);
  overflow: hidden;

  /* derive sizing variables */
  --bsv-scroller-max-height: 90vh; /* one-page viewport; change this to taste */
  --bsv-pageMaxH: calc((var(--bsv-scroller-max-height) - 12px - 18px - 28px) * var(--bsv-zoom));
  /*       scroller height  - top pad - bottom pad - page margins (approx)  */
}

/* Header */
.bsv__appbar {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  background: #4051b5;
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--bsv-outline);
}
.bsv_appbarPages {
  width: 100%;
  display: flex;
  gap: 8px;
  justify-content: space-around;
  flex-wrap: wrap;
}
.bsv__title {
  font-weight: 700;
  letter-spacing: .3px;
  color: #fff;
  font-size: 14px;
}
.bsv__pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--bsv-surface);
  border: 1px solid var(--bsv-outline);
  font-size: 12px;
  color: var(--bsv-pill-color);
}

/* Buttons */
.bsv__btn {
  border: 1px solid var(--bsv-outline);
  background: linear-gradient(180deg, #1b2a59, #16234b);
  color: var(--bsv-text);
  padding: 6px 12px;
  border-radius: 12px;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: .2px;
  transition: transform .06s ease, background .2s ease, box-shadow .2s ease;
  font-size: 12px;
}
.bsv__btn:hover { background: linear-gradient(180deg, #25408b, #1a2f6a); }
.bsv__btn:active { transform: translateY(1px) scale(.99); }
.bsv__btn:disabled { opacity: .6; cursor: not-allowed; }

/* Go-to */
.bsv__goto {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.bsv__goto input[type="number"] {
  width: 100px;
  padding: 6px 8px;
  border-radius: 10px;
  background: var(--bsv-surface-2);
  border: 1px solid var(--bsv-outline);
  font-weight: 700;
  letter-spacing: .3px;
  font-size: 12px;
  color: #000;
}

/* Scroll area (viewport) */
.bsv__scroller {
  max-height: var(--bsv-scroller-max-height);
  overflow: auto;
  scroll-behavior: smooth;
  padding: 12px 10px 18px;
  background: #4051b5;

  /* center the “page” vertically — we’ll scroll so its center meets viewport center */
  display: block;
  scroll-snap-type: y mandatory;
}

/* Page card (auto height; centered horizontally; content centered inside) */
.bsv__page {
  position: relative;
  margin: 14px auto;
  width: auto;
  max-width: min(860px, 100%);
  border-radius: var(--bsv-radius-lg);
  overflow: hidden; /* keeps rounded corners on the image */
  transition: transform .12s ease, box-shadow .2s ease;

  /* center content (image/skeleton) both axes */
  display: flex;
  align-items: center;
  justify-content: center;
  scroll-snap-align: center;
  scroll-snap-stop: always; /* ensures next/prev won’t “skip” */
}

/* Page number badge */
.bsv__meta {
  position: absolute;
  top: 8px; right: 8px;
  background: rgba(11,19,43,.65);
  border: 1px solid var(--bsv-outline);
  color: var(--bsv-muted);
  padding: 4px 8px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 700;
  z-index: 1;
}

/* Skeleton (never cropped; same constraints as the image) */
.bsv__skeleton {
  width: 100%;
  max-width: min(860px, 100%);
  height: var(--bsv-pageMaxH);
  background: linear-gradient(90deg, #0f1730 25%, #172246 37%, #0f1730 63%);
  background-size: 400% 100%;
  animation: bsv-shimmer 1.25s infinite;
  display: grid;
  place-items: center;
  color: var(--bsv-muted);
  font-size: 12px;
}
@keyframes bsv-shimmer { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }

/* Page image (no cropping; uses intrinsic ratio; fits viewport height) */
.bsv__img {
  display: none;            /* shown after load */
  width: auto;
  height: auto;
  max-width: min(860px, 100%);
  max-height: var(--bsv-pageMaxH);
}

/* Bottom controls (zoom) */
.bsv__controls {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: #4051b5;
  border-top: 1px solid var(--bsv-outline);
}
.bsv__zoomLabel {
  color: #fff;
  font-weight: 700;
  font-size: 12px;
}
.bsv__zoomValue {
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  min-width: 42px;
  text-align: right;
}
.bsv__zoom {
  -webkit-appearance: none;
  appearance: none;
  width: 180px;
  height: 6px;
  background: #13204a;
  border-radius: 999px;
  border: 1px solid var(--bsv-outline);
}
.bsv__zoom::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 16px; height: 16px; border-radius: 50%;
  background: linear-gradient(180deg, #7fc3ff, #3e82f2);
  cursor: pointer; border: none;
  box-shadow: 0 1px 2px rgba(0,0,0,.2);
}
.bsv__zoom::-moz-range-thumb {
  width: 16px; height: 16px; border-radius: 50%;
  background: linear-gradient(180deg, #7fc3ff, #3e82f2);
  cursor: pointer; border: none;
  box-shadow: 0 1px 2px rgba(0,0,0,.2);
}

/* Images: prevent drag/select */
img {
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -o-user-select: none;
  user-select: none;
  pointer-events: none;
}

/* Focus styles */
.bsv :focus-visible {
  outline: 2px solid var(--bsv-brand);
  outline-offset: 2px;
}

/* Optional: compact spacing on narrow screens */
@media (max-width: 420px) {
  .bsv__appbar { padding: 8px 10px; gap: 8px; }
  .bsv__controls { padding: 8px 10px; }
  .bsv__zoom { width: 140px; }
}