/* Catálogo digital — visor vertical con scroll */

:root {
  --bg: #181818;
  --toolbar: #242424;
  --text: #ffffff;
  --accent: #c7a66a;
  --accent-dim: rgba(199, 166, 106, 0.25);
  --muted: rgba(255, 255, 255, 0.55);
  --border: rgba(255, 255, 255, 0.1);
  --danger: #e07070;
  --shadow: rgba(0, 0, 0, 0.45);
  --toolbar-h: 56px;
  --progress-h: 3px;
  --page-gap: 1.25rem;
  --page-max-w: min(920px, 100%);
  --safe-t: env(safe-area-inset-top, 0px);
  --safe-r: env(safe-area-inset-right, 0px);
  --safe-b: env(safe-area-inset-bottom, 0px);
  --safe-l: env(safe-area-inset-left, 0px);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-tap-highlight-color: transparent;
}

button, input { font: inherit; color: inherit; }
button { cursor: pointer; border: none; background: transparent; }
button:disabled { opacity: 0.35; cursor: not-allowed; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 10000;
  padding: 0.75rem 1rem; background: var(--accent); color: #181818;
  text-decoration: none; font-weight: 600;
}
.skip-link:focus { left: 1rem; top: 1rem; }

.app {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  background:
    radial-gradient(ellipse 70% 50% at 50% 0%, #2a2a2a 0%, transparent 55%),
    var(--bg);
  padding-top: var(--safe-t);
  padding-right: var(--safe-r);
  padding-bottom: var(--safe-b);
  padding-left: var(--safe-l);
}

/* Loader */
.loader {
  position: absolute; inset: 0; z-index: 50;
  display: grid; place-items: center;
  background: var(--bg);
  transition: opacity 0.35s ease, visibility 0.35s;
}
.app:not([data-loading="true"]) .loader {
  opacity: 0; visibility: hidden; pointer-events: none;
}
.loader__inner { text-align: center; width: min(360px, 88vw); position: relative; }
.loader__logo { max-width: 160px; height: auto; margin-bottom: 1rem; }
.loader__title { margin: 0 0 0.5rem; font-size: 1.35rem; font-weight: 600; }
.loader__status { margin: 0 0 1.25rem; color: var(--muted); font-size: 0.9rem; }
.loader__bar {
  height: 4px; border-radius: 999px;
  background: rgba(255,255,255,0.08); overflow: hidden;
}
.loader__bar-fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--accent), #e2c890);
  transition: width 0.2s ease;
}
.loader__percent { margin: 0.6rem 0 0; font-size: 0.8rem; color: var(--muted); }
.loader__pulse {
  position: absolute; inset: -20% -10%; z-index: -1;
  background: radial-gradient(circle at 50% 40%, var(--accent-dim), transparent 60%);
  animation: pulse 2.4s ease-in-out infinite;
  pointer-events: none;
}
@keyframes pulse {
  0%, 100% { opacity: 0.35; transform: scale(0.96); }
  50% { opacity: 0.7; transform: scale(1.04); }
}

/* Error */
.error-screen {
  position: absolute; inset: 0; z-index: 55;
  display: grid; place-items: center;
  background: rgba(0,0,0,0.72); padding: 1.5rem;
}
.error-screen[hidden] { display: none !important; }
.error-screen__card {
  width: min(420px, 100%); padding: 1.75rem;
  background: var(--toolbar); border: 1px solid var(--border);
  border-radius: 12px; box-shadow: 0 20px 50px var(--shadow);
}
.error-screen__card h2 { margin: 0 0 0.75rem; font-size: 1.15rem; color: var(--danger); }
.error-screen__card p { margin: 0 0 1.25rem; color: var(--muted); line-height: 1.5; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 40px; padding: 0.55rem 1rem; border-radius: 6px;
  border: 1px solid var(--border); background: rgba(255,255,255,0.06);
}
.btn--accent {
  background: var(--accent); color: #1a1a1a; border-color: transparent; font-weight: 600;
}

/* Toolbar */
.toolbar {
  position: relative; z-index: 30;
  display: flex; align-items: center; gap: 0.5rem;
  min-height: var(--toolbar-h);
  padding: 0.35rem 0.75rem;
  background: color-mix(in srgb, var(--toolbar) 82%, transparent);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
@supports not ((backdrop-filter: blur(1px)) or (-webkit-backdrop-filter: blur(1px))) {
  .toolbar { background: var(--toolbar); }
}
.toolbar__brand { display: flex; align-items: center; gap: 0.6rem; min-width: 0; }
.toolbar__logo { height: 28px; width: auto; max-width: 120px; object-fit: contain; }
.toolbar__title {
  font-size: 0.92rem; font-weight: 600; white-space: nowrap;
  overflow: hidden; text-overflow: ellipsis; max-width: 180px;
}
.toolbar__nav, .toolbar__actions { display: flex; align-items: center; gap: 0.15rem; }
.toolbar__nav { margin-inline: auto; }
.toolbar__page {
  display: flex; align-items: center; gap: 0.25rem;
  margin: 0 0.35rem; font-variant-numeric: tabular-nums; font-size: 0.85rem;
}
.page-input {
  width: 3.2rem; text-align: center; padding: 0.3rem 0.25rem;
  border-radius: 4px; border: 1px solid var(--border);
  background: rgba(0,0,0,0.25); -moz-appearance: textfield;
}
.page-input::-webkit-outer-spin-button,
.page-input::-webkit-inner-spin-button { -webkit-appearance: none; margin: 0; }
.page-input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
.page-sep, .page-total, .zoom-label { color: var(--muted); font-size: 0.8rem; }
.zoom-label { min-width: 2.6rem; text-align: center; }

.tool-btn {
  display: inline-grid; place-items: center;
  width: 38px; height: 38px; border-radius: 6px; color: var(--text);
  transition: background 0.15s, color 0.15s;
}
.tool-btn svg {
  width: 20px; height: 20px; fill: none; stroke: currentColor;
  stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round;
}
.tool-btn:hover:not(:disabled) { background: rgba(255,255,255,0.08); color: var(--accent); }
.tool-btn:focus-visible,
.btn:focus-visible,
.thumb-item:focus-visible,
.search-result:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.tool-btn[aria-expanded="true"] { background: var(--accent-dim); color: var(--accent); }
.toolbar__more { display: none; }

.mobile-menu {
  position: absolute; top: calc(100% + 4px); right: 0.5rem; z-index: 40;
  min-width: 200px; padding: 0.4rem;
  background: var(--toolbar); border: 1px solid var(--border);
  border-radius: 10px; box-shadow: 0 12px 32px var(--shadow);
  display: flex; flex-direction: column;
}
.mobile-menu[hidden] { display: none !important; }
.mobile-menu button { text-align: left; padding: 0.7rem 0.85rem; border-radius: 6px; }
.mobile-menu button:hover { background: rgba(255,255,255,0.07); }

/* Stage + scroll */
.stage {
  position: relative; flex: 1; min-height: 0;
  display: flex; flex-direction: column; outline: none;
}

.scroll-viewport {
  flex: 1; min-height: 0;
  overflow: auto;
  overscroll-behavior: contain;
  -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  outline: none;
}

.pages-column {
  width: var(--page-max-w);
  max-width: 100%;
  margin: 0 auto;
  padding: 1.25rem clamp(0.75rem, 3vw, 1.5rem) 3rem;
  display: flex;
  flex-direction: column;
  gap: var(--page-gap);
  transform-origin: top center;
}

.page-block {
  position: relative;
  width: 100%;
  background: #111;
  box-shadow: 0 10px 30px rgba(0,0,0,0.35);
  border: 1px solid rgba(255,255,255,0.06);
  overflow: hidden;
}

.page-block.is-current {
  outline: 2px solid color-mix(in srgb, var(--accent) 70%, transparent);
  outline-offset: 2px;
}

.page-block__inner {
  position: relative;
  width: 100%;
  /* aspect-ratio set inline from PDF */
}

.page-block canvas {
  display: block;
  width: 100%;
  height: auto;
  vertical-align: top;
  background: #f4f4f4;
}

.page-block__placeholder {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  background: repeating-linear-gradient(
    -12deg, #2a2a2a, #2a2a2a 8px, #242424 8px, #242424 16px
  );
  color: var(--muted); font-size: 0.85rem;
}

.page-block__label {
  position: absolute;
  right: 0.5rem; bottom: 0.5rem;
  z-index: 2;
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  background: rgba(0,0,0,0.55);
  font-size: 0.7rem;
  color: var(--muted);
  pointer-events: none;
}

.page-hotspots {
  position: absolute; inset: 0; z-index: 3; pointer-events: none;
}
.page-hotspots a {
  position: absolute; pointer-events: auto; cursor: pointer;
  border-radius: 2px;
}
.page-hotspots a:hover,
.page-hotspots a:focus-visible {
  background: rgba(199, 166, 106, 0.2);
  outline: 2px solid var(--accent);
}
.app[data-hotspot-debug="true"] .page-hotspots a {
  outline: 1px dashed var(--accent);
  background: rgba(199, 166, 106, 0.12);
}

.render-indicator {
  position: sticky; bottom: 1rem; left: 50%;
  width: fit-content; margin: 0 auto;
  z-index: 9; padding: 0.35rem 0.75rem;
  border-radius: 999px; background: rgba(0,0,0,0.65);
  border: 1px solid var(--border); font-size: 0.75rem; color: var(--muted);
}

.progress-track { height: var(--progress-h); background: rgba(255,255,255,0.06); flex-shrink: 0; }
.progress-fill { height: 100%; width: 0%; background: var(--accent); transition: width 0.15s ease; }

/* Panels */
.panel-backdrop {
  position: absolute; inset: 0; z-index: 34; background: rgba(0,0,0,0.45);
}
.panel-backdrop[hidden] { display: none !important; }

.side-panel {
  position: absolute;
  top: calc(var(--toolbar-h) + var(--safe-t));
  bottom: var(--safe-b);
  z-index: 36;
  width: min(320px, 92vw);
  display: flex; flex-direction: column;
  background: color-mix(in srgb, var(--toolbar) 94%, transparent);
  border: 1px solid var(--border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: 0 16px 40px var(--shadow);
}
.thumbs-panel { left: 0; border-left: none; border-radius: 0 12px 12px 0; }
.search-panel { right: 0; border-right: none; border-radius: 12px 0 0 12px; }
.side-panel[hidden] { display: none !important; }
.side-panel__header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.75rem 0.85rem; border-bottom: 1px solid var(--border);
}
.side-panel__header h2 { margin: 0; font-size: 0.95rem; }

.thumbs-list {
  flex: 1; overflow: auto; padding: 0.75rem;
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 0.65rem;
  overscroll-behavior: contain;
}
.thumb-item {
  display: flex; flex-direction: column; gap: 0.35rem;
  padding: 0.35rem; border-radius: 6px; border: 1px solid transparent;
  background: rgba(0,0,0,0.2); text-align: center; color: var(--muted); font-size: 0.72rem;
}
.thumb-item.is-current { border-color: var(--accent); color: var(--accent); }
.thumb-item canvas, .thumb-item .thumb-ph {
  width: 100%; aspect-ratio: 3/4; background: #222; border-radius: 3px; object-fit: contain;
}
.thumb-ph { display: grid; place-items: center; }

.search-form { display: flex; gap: 0.4rem; padding: 0.75rem; }
.search-form input {
  flex: 1; min-width: 0; padding: 0.55rem 0.7rem; border-radius: 6px;
  border: 1px solid var(--border); background: rgba(0,0,0,0.25);
}
.search-status { margin: 0; padding: 0 0.75rem 0.5rem; color: var(--muted); font-size: 0.8rem; }
.search-results { flex: 1; overflow: auto; padding: 0 0.5rem 0.75rem; }
.search-result {
  display: block; width: 100%; text-align: left;
  padding: 0.7rem 0.75rem; border-radius: 6px; margin-bottom: 0.25rem;
}
.search-result:hover, .search-result.is-active { background: var(--accent-dim); }
.search-result strong { color: var(--accent); }

.toast {
  position: absolute; bottom: calc(1.25rem + var(--safe-b)); left: 50%;
  transform: translateX(-50%); z-index: 60;
  max-width: min(420px, 90vw); padding: 0.7rem 1rem; border-radius: 8px;
  background: #2e2e2e; border: 1px solid var(--border);
  box-shadow: 0 10px 30px var(--shadow); font-size: 0.875rem; text-align: center;
}
.toast[hidden] { display: none !important; }

@media (prefers-reduced-motion: reduce) {
  .scroll-viewport { scroll-behavior: auto; }
  .loader__pulse { display: none; }
}

@media (max-width: 900px) {
  .toolbar__actions #btn-search,
  .toolbar__actions #btn-thumbs,
  .toolbar__actions #btn-zoom-reset { display: none; }
  .toolbar__more { display: inline-grid; }
  .toolbar__title { max-width: 110px; }
}

@media (max-width: 640px) {
  :root { --toolbar-h: 52px; --page-gap: 0.85rem; }
  .toolbar { flex-wrap: wrap; gap: 0.25rem; padding: 0.3rem 0.4rem; }
  .toolbar__brand { order: 1; flex: 1; }
  .toolbar__title { display: none; }
  .toolbar__nav { order: 3; width: 100%; justify-content: center; margin: 0; }
  .toolbar__actions { order: 2; }
  .toolbar__actions .zoom-label,
  .toolbar__actions #btn-zoom-out,
  .toolbar__actions #btn-zoom-in { display: none; }
  .side-panel { width: 100%; border-radius: 0; left: 0 !important; right: 0 !important; }
  .pages-column { padding: 0.75rem 0.5rem 2.5rem; }
}