/* ── BPG PDF Viewer ──────────────────────────────────────── */

.bpv-wrap {
  --bpv-h:       750px;
  --bpv-nav:     #1e1e1e;
  --bpv-border:  #333;
  --bpv-text:    #e0e0e0;
  --bpv-muted:   #888;
  --bpv-accent:  #4a9eff;
  --bpv-bg:      #525659;
  --bpv-radius:  6px;

  display: flex;
  flex-direction: column;
  border: 1px solid var(--bpv-border);
  border-radius: var(--bpv-radius);
  overflow: hidden;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 13px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.15);
  margin: 1.5em 0;
}

/* ── Toolbar ─────────────────────────────────────────────── */
.bpv-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: var(--bpv-nav);
  border-bottom: 1px solid var(--bpv-border);
  flex-wrap: wrap;
  user-select: none;
}

.bpv-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.bpv-zoom,
.bpv-actions {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* Toolbar dividers */
.bpv-zoom {
  border-left: 1px solid var(--bpv-border);
  padding-left: 10px;
}
.bpv-actions {
  border-left: 1px solid var(--bpv-border);
  padding-left: 10px;
}

/* ── Buttons ─────────────────────────────────────────────── */
.bpv-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 9px;
  background: transparent;
  border: none;
  border-radius: 4px;
  color: var(--bpv-text);
  font-size: 13px;
  cursor: pointer;
  white-space: nowrap;
  line-height: 1;
  transition: background 0.12s;
}
.bpv-btn:hover  { background: rgba(255,255,255,0.08); }
.bpv-btn:active { background: rgba(255,255,255,0.14); }

.bpv-dl-btn  { color: var(--bpv-accent); }
.bpv-top-btn { color: var(--bpv-muted);  }

/* ── Page number input ───────────────────────────────────── */
.bpv-page-wrap {
  display: flex;
  align-items: center;
  gap: 5px;
}

.bpv-page-input {
  width: 46px;
  text-align: center;
  background: #2a2a2a;
  border: 1px solid var(--bpv-border);
  border-radius: 4px;
  color: var(--bpv-text);
  font-size: 13px;
  padding: 4px 4px;
  -moz-appearance: textfield;
}
.bpv-page-input::-webkit-outer-spin-button,
.bpv-page-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.bpv-page-input:focus {
  outline: none;
  border-color: var(--bpv-accent);
}

.bpv-page-total { color: var(--bpv-muted); }
.bpv-zoom-pct   { color: var(--bpv-muted); min-width: 40px; text-align: center; }

/* ── Scrollable page area ────────────────────────────────── */
.bpv-pages {
  height: var(--bpv-h);
  overflow-y: auto;
  background: var(--bpv-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 20px 16px 32px;
  scroll-behavior: smooth;
}

/* ── Individual page canvases ────────────────────────────── */
.bpv-page {
  position: relative;
  max-width: 100%; 
  background: #fff;
  box-shadow: 0 2px 14px rgba(0,0,0,0.45);
  flex-shrink: 0;
  max-width: 100%;
}

.bpv-page canvas {
  display: block;
  width: 100%;
  height: auto;
}

.bpv-page-num {
  position: absolute;
  bottom: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 11px;
  color: #aaa;
  white-space: nowrap;
  pointer-events: none;
}

/* ── Loading state ───────────────────────────────────────── */
.bpv-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  color: var(--bpv-muted);
  background: var(--bpv-bg);
  font-size: 14px;
}

/* ── Responsive — narrow screens ─────────────────────────── */
@media (max-width: 540px) {
  .bpv-toolbar  { gap: 4px; padding: 6px 8px; }
  .bpv-actions  { display: none; } /* hide top/download on very small screens — use browser's native options */
  .bpv-zoom-pct { display: none; }
}