:root {
  color-scheme: light;
  --ink: #111;
  --paper: #fff;
  --stone: #efeee9;
  --soft-stone: #f7f6f3;
  --line: #cfccc4;
  --accent: #746d5e;
  font-family: azo-sans-web, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  width: 100%;
  height: 100%;
  min-height: 0;
}

body {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  margin: 0;
  overflow: hidden;
  color: var(--ink);
  background: var(--stone);
}

.toolbar {
  position: relative;
  z-index: 10;
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 10px 20px;
  background: rgba(255,255,255,.97);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(17,17,17,.05);
}

.brand-title {
  display: flex;
  min-width: 235px;
  align-items: center;
  gap: 14px;
  margin: 0;
  font: 300 .72rem/1.25 azo-sans-web, Arial, sans-serif;
  letter-spacing: .07em;
  text-transform: uppercase;
}

.brand-title img {
  display: block;
  width: 126px;
  height: auto;
}

.brand-title span {
  max-width: 96px;
  padding-left: 14px;
  border-left: 1px solid var(--line);
}

.controls { display: flex; flex-wrap: wrap; align-items: center; justify-content: flex-end; gap: 8px; }

.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;
}

button, .control-link {
  min-height: 38px;
  padding: 8px 12px;
  border: 1px solid var(--ink);
  color: var(--ink);
  background: var(--paper);
  cursor: pointer;
  text-decoration: none;
  font: 400 .68rem/1 azo-sans-web, Arial, sans-serif;
  letter-spacing: .07em;
  text-transform: uppercase;
}

button:hover, button:focus-visible, .control-link:hover, .control-link:focus-visible {
  color: white;
  background: var(--ink);
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.control-link:not(.secondary) {
  color: white;
  background: var(--ink);
}

.control-link:not(.secondary):hover,
.control-link:not(.secondary):focus-visible {
  color: var(--ink);
  background: var(--paper);
}

.pagination-control,
.zoom-control {
  display: flex;
  min-height: 42px;
  align-items: center;
  gap: 4px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--soft-stone);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.75);
}

.pagination-control .icon-button,
.zoom-control .icon-button {
  width: 34px;
  min-height: 34px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: 0;
}

.page-field {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: .78rem;
  color: #5e5b55;
}

.page-field input {
  width: 42px;
  height: 30px;
  padding: 3px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--ink);
  background: var(--paper);
  text-align: center;
  font: 400 .8rem/1 azo-sans-web, Arial, sans-serif;
  appearance: textfield;
}

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

.page-field input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.page-scrubber {
  display: flex;
  align-items: center;
  min-height: 34px;
  padding: 0 5px;
}

.page-scrubber input {
  width: clamp(80px, 8vw, 120px);
  accent-color: var(--ink);
  cursor: pointer;
}

.page-scrubber input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

button:disabled {
  cursor: not-allowed;
  opacity: .4;
}

.zoom-control {
  min-width: 157px;
  justify-content: center;
}

.zoom-control #zoom-level {
  min-width: 42px;
  text-align: center;
  color: #5e5b55;
  font-size: .72rem;
}

.zoom-control .fit-button {
  min-height: 30px;
  padding: 5px 8px;
  border: 0;
  border-left: 1px solid var(--line);
  font-size: .64rem;
}

.stage {
  display: grid;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  overflow: hidden;
  place-items: center;
  padding: clamp(10px, 2.5vh, 24px) 20px;
  background: var(--stone);
}

.stage.is-zoomed {
  display: block;
  overflow: auto;
  cursor: grab;
  overscroll-behavior: contain;
  scrollbar-color: var(--accent) #d8d5ce;
}

.stage.is-zoomed .flip-book {
  margin: 0 auto;
  pointer-events: none;
}

.stage.is-zoomed.is-panning {
  cursor: grabbing;
  user-select: none;
}

.stage.is-zoomed .page,
.stage.is-zoomed .page img {
  cursor: inherit;
}

:fullscreen body {
  background: var(--stone);
}

:fullscreen .hint {
  right: 8px;
  bottom: 6px;
}

.flip-book {
  display: none;
}

.page {
  overflow: hidden;
  background: white;
  box-shadow: inset 0 0 0 1px rgba(0,0,0,.08);
}

.page img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  user-select: none;
}

.page-cover { background: #203d34; }
.page-cover img { object-fit: contain; }

.hint {
  position: fixed;
  right: 14px;
  bottom: 12px;
  z-index: 20;
  margin: 0;
  padding: 7px 10px;
  color: var(--ink);
  background: rgba(255,255,255,.9);
  border: 1px solid var(--line);
  font-size: .7rem;
  letter-spacing: .02em;
}

.error {
  max-width: 620px;
  padding: 24px;
  color: #28120e;
  background: #f4ded8;
}

@media (max-width: 720px) {
  .toolbar { align-items: flex-start; flex-direction: column; }
  .brand-title { min-width: 0; }
  .brand-title img { width: 118px; }
  .controls { justify-content: flex-start; }
  .stage { padding: 10px 8px 34px; }
  .page-scrubber input { width: 82px; }
  .zoom-control { min-width: 147px; }
  .control-link.secondary { display: none; }
  .hint { display: none; }
}