/* ============================================================================
 * pdf-preview-modal.css — RuKa JUDO admin SPA
 *
 * V9.13 (2026-05-11) — lean port z richtodo-web (KI-R118 baseline ~580 LOC).
 * Adapted na RuKa washi-paper × sumi-aka design tokens (admin.css :root).
 * Strip: orientation toggle, export popover, XFA notice, password form.
 * ============================================================================ */

/* ---- Overlay + dialog entrance ------------------------------------------ */
.pdfp-overlay {
  position: fixed;
  inset: 0;
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--modal-backdrop-bg);
  backdrop-filter: blur(var(--modal-backdrop-blur));
  -webkit-backdrop-filter: blur(var(--modal-backdrop-blur));
  opacity: 0;
  transition: opacity var(--dur-mid) var(--ease-fade);
  padding: var(--space-4);
}

.pdfp-overlay.is-visible { opacity: 1; }

.pdfp-dialog {
  width: min(100%, 1280px);
  height: calc(100vh - 32px);
  background:
    linear-gradient(145deg,
      color-mix(in srgb, var(--color-surface) 96%, white) 0%,
      var(--color-surface) 100%);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  box-shadow:
    var(--shadow-glass),
    0 24px 64px -16px rgba(60, 40, 20, 0.22);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  transform: translateY(20px) scale(0.96);
  opacity: 0;
  transition:
    transform var(--dur-mid) var(--ease-spring-overshoot),
    opacity var(--dur-mid) var(--ease-fade);
}

.pdfp-overlay.is-visible .pdfp-dialog {
  transform: translateY(0) scale(1);
  opacity: 1;
}

@media (prefers-reduced-motion: reduce) {
  .pdfp-overlay,
  .pdfp-dialog {
    transition: none;
    transform: none;
  }
}

/* ---- Header ------------------------------------------------------------- */
.pdfp-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-5);
  border-bottom: 1px solid var(--color-line);
  flex-shrink: 0;
  background: color-mix(in srgb, var(--color-surface-2) 60%, transparent);
}

.pdfp-filename {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink);
  letter-spacing: -0.01em;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  margin-right: var(--space-3);
  font-family: var(--font-display);
}

.pdfp-close {
  background: transparent;
  border: 1px solid var(--color-line);
  color: var(--color-ink-muted);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  font-size: 22px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-spring),
    color var(--dur-fast) var(--ease-spring),
    border-color var(--dur-fast) var(--ease-spring),
    transform var(--dur-fast) var(--ease-spring);
}

.pdfp-close:hover {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: color-mix(in srgb, var(--color-danger) 40%, var(--color-line));
}

.pdfp-close:active { transform: scale(0.94); }

/* ---- Toolbar ------------------------------------------------------------ */
.pdfp-toolbar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  border-bottom: 1px solid var(--color-line);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.pdfp-toolbar-group {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 3px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-line);
  border-radius: 999px;
}

.pdfp-toolbar-spacer { flex: 1; min-width: 8px; }

.pdfp-btn {
  /* Min 44×44 touch target (WCAG 2.5.5) — width grows for text variant */
  min-height: 36px;
  min-width: 36px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 999px;
  color: var(--color-ink);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  transition:
    background var(--dur-fast) var(--ease-spring),
    color var(--dur-fast) var(--ease-spring),
    transform var(--dur-fast) var(--ease-spring);
}

.pdfp-btn:not(:disabled):hover {
  background: color-mix(in srgb, var(--color-accent) 12%, transparent);
  color: var(--color-accent);
}

.pdfp-btn:not(:disabled):active {
  transform: scale(0.96);
}

.pdfp-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.pdfp-btn:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 2px;
}

.pdfp-btn-text {
  padding: 0 14px;
  font-size: var(--text-sm);
}

.pdfp-btn-primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: 0 16px;
  font-weight: 600;
}

.pdfp-btn-primary:not(:disabled):hover {
  background: var(--color-accent-hover);
  color: var(--color-on-accent);
}

.pdfp-page-info {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--text-sm);
  font-variant-numeric: tabular-nums;
  color: var(--color-ink-muted);
  padding: 0 var(--space-2);
}

.pdfp-page-input {
  width: 54px;
  height: 30px;
  padding: 0 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  color: var(--color-ink);
  font: inherit;
  font-variant-numeric: tabular-nums;
  text-align: right;
}

.pdfp-page-input:focus-visible {
  outline: 2px solid var(--color-ring);
  outline-offset: 1px;
}

.pdfp-page-input::-webkit-inner-spin-button,
.pdfp-page-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.pdfp-zoom-info {
  font-size: var(--text-sm);
  color: var(--color-ink-muted);
  min-width: 56px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* ---- Body --------------------------------------------------------------- */
.pdfp-body {
  flex: 1;
  min-height: 0;
  overflow: hidden;
  position: relative;
  background:
    radial-gradient(800px 500px at 50% 0%, color-mix(in srgb, var(--color-accent) 4%, transparent), transparent 60%),
    var(--color-surface-2);
}

.pdfp-pdf-scroll {
  width: 100%;
  height: 100%;
  overflow: auto;
  padding: var(--space-4);
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.pdfp-page {
  position: relative;
  box-shadow:
    0 1px 3px rgba(60, 40, 20, 0.16),
    0 12px 32px -8px rgba(60, 40, 20, 0.18);
  background: white;
  border-radius: 2px;
}

.pdfp-pdf-canvas {
  display: block;
  position: absolute;
  inset: 0;
}

/* Text layer overlay — PDF.js standard pattern.
 * Spany s `color: transparent` sedí přesně nad canvasem; user-select: text
 * enables nativní označování + Ctrl+C copy. */
.pdfp-page .textLayer {
  position: absolute;
  inset: 0;
  overflow: hidden;
  opacity: 0.999;
  line-height: 1;
  user-select: text;
  -webkit-user-select: text;
  cursor: text;
  pointer-events: auto;
}

.pdfp-page .textLayer > span,
.pdfp-page .textLayer br {
  color: transparent;
  position: absolute;
  white-space: pre;
  transform-origin: 0% 0%;
}

.pdfp-page .textLayer ::selection {
  background: color-mix(in srgb, var(--color-accent) 35%, white);
}

.pdfp-page .textLayer ::-moz-selection {
  background: color-mix(in srgb, var(--color-accent) 35%, white);
}

/* ---- Image preview ------------------------------------------------------ */
.pdfp-image-scroll {
  width: 100%;
  height: 100%;
  overflow: auto;
  padding: var(--space-4);
  display: flex;
  justify-content: center;
  align-items: center;
}

.pdfp-image {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  background: white;
  border-radius: 2px;
  box-shadow:
    0 1px 3px rgba(60, 40, 20, 0.16),
    0 12px 32px -8px rgba(60, 40, 20, 0.18);
}

/* ---- Loading / error / fallback ---------------------------------------- */
.pdfp-loading,
.pdfp-fallback,
.pdfp-error {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  color: var(--color-ink-muted);
  text-align: center;
  padding: var(--space-5);
}

.pdfp-spinner {
  width: 36px;
  height: 36px;
  border: 3px solid color-mix(in srgb, var(--color-accent) 18%, transparent);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: pdfp-spin 0.9s linear infinite;
}

@keyframes pdfp-spin {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  .pdfp-spinner { animation: none; }
}

.pdfp-error-icon,
.pdfp-fallback-icon {
  font-size: 48px;
  line-height: 1;
}

.pdfp-error-text,
.pdfp-fallback-title {
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-ink);
  font-family: var(--font-display);
}

.pdfp-fallback-text {
  font-size: var(--text-sm);
}

/* ---- Footer ------------------------------------------------------------- */
.pdfp-footer {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: 6px var(--space-5);
  border-top: 1px solid var(--color-line);
  flex-shrink: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-faint);
  flex-wrap: wrap;
  background: color-mix(in srgb, var(--color-surface-2) 60%, transparent);
}

.pdfp-hint {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.pdfp-key {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 18px;
  height: 18px;
  padding: 0 5px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-bottom-width: 2px;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 600;
  color: var(--color-ink-muted);
  margin-right: 4px;
}

/* ---- Mobile (≤640px) — toolbar wrap, footer hidden ---------------------- */
@media (max-width: 640px) {
  .pdfp-overlay { padding: 0; }

  .pdfp-dialog {
    width: 100%;
    height: 100dvh;
    height: 100svh;
    border-radius: 0;
    border: 0;
  }

  .pdfp-header { padding: var(--space-3); }

  .pdfp-toolbar {
    padding: var(--space-2) var(--space-3);
    gap: var(--space-1);
  }

  .pdfp-toolbar-group { padding: 2px; }

  .pdfp-btn-text {
    padding: 0 10px;
    /* Hide "Šířka" / "Stránka" text on smallest screens (icons-only fit) */
    font-size: var(--text-xs);
  }

  .pdfp-footer { display: none; }
}