/* Aasta's immersive reader surface. The semantic paginator remains the source
   of truth; these rules only change presentation and responsive reading mode. */
.reader-view {
  --reader-measure: 66ch;
  --reader-page-inline-padding: clamp(36px, 8vw, 128px);
  --reader-page-block-padding: clamp(34px, 5vh, 64px);
}

.reader-view[data-reader-margin="narrow"] {
  --reader-page-inline-padding: clamp(24px, 5vw, 72px);
}

.reader-view[data-reader-margin="comfortable"] {
  --reader-page-inline-padding: clamp(36px, 8vw, 128px);
}

.reader-view[data-reader-margin="wide"] {
  --reader-page-inline-padding: clamp(54px, 13vw, 210px);
}

/* Minimal chrome: the content, not a fake paperback frame, fills the browser. */
.reader-view .reader-topbar {
  min-height: calc(68px + var(--safe-top));
  padding: calc(10px + var(--safe-top)) calc(18px + var(--safe-right)) 10px calc(18px + var(--safe-left));
  background: color-mix(in srgb, var(--reader-bg) 96%, transparent);
  border-bottom-color: color-mix(in srgb, var(--reader-border) 70%, transparent);
  box-shadow: none;
}

.reader-view .chapter-pill {
  justify-self: start;
  max-width: min(620px, 52vw);
  text-align: left;
}

.reader-view .chapter-pill span {
  font-size: 8px;
  letter-spacing: .14em;
}

.reader-view .chapter-pill strong {
  margin-top: 2px;
  font-size: 15px;
}

.reader-view .topbar-actions {
  gap: 3px;
}

.reader-view .topbar-actions .icon-button.labelled,
.reader-view .reader-layout-button {
  min-width: 44px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 11px;
  background: transparent;
  box-shadow: none;
}

.reader-view .topbar-actions .icon-button.labelled:hover,
.reader-view .topbar-actions .icon-button.labelled:focus-visible,
.reader-view .reader-layout-button:hover,
.reader-view .reader-layout-button:focus-visible {
  background: color-mix(in srgb, var(--reader-page) 82%, transparent);
}

.reader-view .topbar-actions .icon-button small,
.reader-view .reader-layout-button small {
  display: none;
}

.reader-view #settingsButton { order: 1; }
.reader-view #readerLayoutButton { order: 2; }
.reader-view #bookmarkButton { order: 3; }
.reader-view #waveButton { order: 4; }
.reader-view #fullscreenButton { order: 5; }

.reader-view .chapter-edge {
  opacity: 0;
  pointer-events: none;
}

.reader-view[data-reader-view="single"] .reader-stage {
  inset: calc(68px + var(--safe-top)) 0 calc(58px + var(--safe-bottom));
  grid-template-columns: 0 minmax(0, 1fr) 0;
}

.reader-view[data-reader-view="single"] .pages-viewport {
  padding: 0;
  background: var(--reader-page);
}

.reader-view[data-reader-view="single"] .page-sheet:not(.measure-page) {
  height: 100%;
  padding-inline: var(--reader-page-inline-padding);
  padding-block: var(--reader-page-block-padding);
  border: 0;
  border-radius: 0;
  background: var(--reader-page);
  box-shadow: none;
}

.reader-view[data-reader-view="single"] .page-sheet:not(.measure-page)::after {
  display: none;
}

.reader-view[data-reader-view="single"] .measure-page {
  width: 100vw;
  max-width: none;
  height: calc(100dvh - 68px - 58px - var(--safe-top) - var(--safe-bottom));
  padding-inline: var(--reader-page-inline-padding);
  padding-block: var(--reader-page-block-padding);
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.reader-view[data-reader-view="single"] .page-sheet p,
.reader-view[data-reader-view="single"] .reader-block,
.reader-view[data-reader-view="single"] .reader-block-chapter-heading,
.reader-view[data-reader-view="single"] .page-sheet .chapter-heading {
  max-inline-size: var(--reader-measure);
  max-width: var(--reader-measure);
  margin-inline: auto;
}

.reader-view[data-reader-view="single"] .reader-block-paragraph,
.reader-view[data-reader-view="single"] .reader-block-quote,
.reader-view[data-reader-view="single"] .reader-block-list,
.reader-view[data-reader-view="single"] .reader-block-body,
.reader-view[data-reader-view="single"] .page-sheet p {
  text-wrap: pretty;
  letter-spacing: 0;
}

/* Quiet edge navigation replaces instructional "Previous page / Move down" text. */
.reader-view[data-reader-view="single"] .page-controls {
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 100%;
  min-height: 0;
  display: block;
  pointer-events: none;
}

.reader-view[data-reader-view="single"] .page-controls button {
  position: absolute;
  top: calc(50% - 28px);
  width: 46px;
  height: 56px;
  padding: 0;
  display: grid;
  place-items: center;
  border: 0;
  border-radius: 999px;
  background: color-mix(in srgb, var(--reader-bg) 62%, transparent);
  color: var(--reader-muted);
  font-size: 26px;
  line-height: 1;
  opacity: .34;
  pointer-events: auto;
  transition: opacity .18s ease, background .18s ease, color .18s ease;
}

.reader-view[data-reader-view="single"] .page-controls button:first-child { left: 12px; }
.reader-view[data-reader-view="single"] .page-controls button:last-child { right: 12px; }

.reader-view[data-reader-view="single"] .page-controls button:hover,
.reader-view[data-reader-view="single"] .page-controls button:focus-visible {
  opacity: .9;
  color: var(--reader-text);
  background: color-mix(in srgb, var(--reader-page) 92%, transparent);
}

.reader-view[data-reader-view="single"] .page-controls button:disabled { opacity: .08; }
.reader-view[data-reader-view="single"] .page-controls p { display: none; }

.reader-view .reader-footer {
  min-height: calc(58px + var(--safe-bottom));
  padding: 8px calc(28px + var(--safe-right)) calc(8px + var(--safe-bottom)) calc(28px + var(--safe-left));
  background: color-mix(in srgb, var(--reader-bg) 97%, transparent);
  border-top-color: color-mix(in srgb, var(--reader-border) 68%, transparent);
  box-shadow: none;
}

.reader-view .reader-hint {
  display: none;
}

.reader-view .progress-meta {
  position: relative;
  min-height: 17px;
  justify-content: center;
  align-items: center;
}

.reader-view #chapterProgressLabel,
.reader-view #bookProgressLabel {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.reader-view #sessionStatus[hidden] { display: none !important; }

.reader-view #sessionStatus:not([hidden]) {
  position: absolute;
  left: 0;
  min-height: 28px;
  border: 0;
  background: transparent;
  font-size: 10px;
}

.reader-view .reader-page-summary {
  color: var(--reader-muted);
  font-size: 11px;
  letter-spacing: .01em;
}

.reader-view .progress-track {
  width: min(1120px, 88vw);
  height: 2px;
  margin: 6px auto 0;
}

/* Two physical pages are opt-in/auto only when reader-view-mode says both can
   remain readable. The existing page curl animation is preserved. */
.reader-view[data-reader-view="spread"].flipbook-enabled {
  --flipbook-width: min(1680px, calc(100vw - clamp(64px, 5vw, 112px)));
  --flipbook-height: min(860px, calc(100dvh - 154px));
  --flipbook-pad-x: clamp(38px, 3.2vw, 64px);
  --flipbook-pad-y: clamp(34px, 4.2vh, 58px);
  --flipbook-page-radius: 3px;
}

.reader-view[data-reader-view="spread"][data-reader-margin="narrow"].flipbook-enabled {
  --flipbook-pad-x: clamp(28px, 2.4vw, 48px);
}

.reader-view[data-reader-view="spread"][data-reader-margin="comfortable"].flipbook-enabled {
  --flipbook-pad-x: clamp(38px, 3.2vw, 64px);
}

.reader-view[data-reader-view="spread"][data-reader-margin="wide"].flipbook-enabled {
  --flipbook-pad-x: clamp(52px, 4.2vw, 82px);
}

.reader-view[data-reader-view="spread"].flipbook-spread-mode .reader-stage {
  inset: calc(64px + var(--safe-top)) 0 calc(58px + var(--safe-bottom));
}

.reader-view[data-reader-view="spread"].flipbook-spread-mode .pages-viewport {
  padding: 8px 0 32px;
}

.reader-view[data-reader-view="spread"].flipbook-spread-mode .flipbook-physical-page .reader-block,
.reader-view[data-reader-view="spread"].flipbook-spread-mode .flipbook-physical-page p,
.reader-view[data-reader-view="spread"].flipbook-spread-mode .flipbook-physical-page .chapter-heading {
  max-width: 54ch;
}

/* Compact Kindle/Kobo-style settings popover on desktop. */
.reader-view-setting-panel {
  margin: 0 0 18px;
  padding: 0 0 18px;
  border-bottom: 1px solid var(--reader-border);
}

.reader-margin-setting-panel {
  margin-top: -7px;
}

.reader-setting-label {
  margin: 0 0 9px;
  color: var(--reader-text);
  font-size: 12px;
  font-weight: 760;
}

.reader-setting-help {
  margin: 9px 0 0;
  color: var(--reader-muted);
  font-size: 10px;
  line-height: 1.45;
}

.reader-segmented-control {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  padding: 3px;
  border: 1px solid var(--reader-border);
  border-radius: 11px;
  background: color-mix(in srgb, var(--reader-bg) 84%, transparent);
}

.reader-segmented-control button {
  min-height: 38px;
  padding: 0 8px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--reader-muted);
  font-size: 11px;
  font-weight: 680;
}

.reader-segmented-control button[aria-pressed="true"] {
  background: var(--reader-page);
  color: var(--reader-text);
  box-shadow: 0 1px 6px rgba(35, 22, 15, .09);
}

@media (min-width: 900px) {
  .reader-view .settings-drawer {
    top: calc(78px + var(--safe-top));
    right: calc(18px + var(--safe-right));
    bottom: auto;
    width: min(380px, calc(100vw - 36px));
    max-height: calc(100dvh - 96px - var(--safe-top) - var(--safe-bottom));
    padding: 19px 20px 22px;
    border: 1px solid var(--reader-border);
    border-radius: 16px;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-8px) scale(.985);
    transform-origin: top right;
    box-shadow: 0 18px 52px rgba(35, 22, 15, .18);
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
  }

  .reader-view .settings-drawer.open {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }

  .reader-view .settings-drawer .drawer-header {
    align-items: center;
  }

  .reader-view .settings-drawer .drawer-header h2 {
    margin: 0 0 18px;
    font-size: 22px;
    line-height: 1.05;
  }

  .reader-view .settings-drawer .drawer-header .eyebrow {
    display: none;
  }

  .reader-view .settings-drawer .setting-row {
    margin: 17px 0;
    font-size: 12px;
  }

  .reader-view .settings-drawer .theme-options,
  .reader-view .settings-drawer .font-options {
    margin: 18px 0;
  }

  .reader-view:has(.settings-drawer.open) .drawer-backdrop {
    background: transparent;
    backdrop-filter: none;
  }
}

@media (max-width: 899px) {
  .reader-view {
    --reader-page-inline-padding: 22px;
    --reader-page-block-padding: 30px;
    --reader-measure: 66ch;
  }

  .reader-view[data-reader-view="single"] .reader-stage {
    inset: calc(64px + var(--safe-top)) 0 calc(54px + var(--safe-bottom));
  }

  .reader-view .reader-topbar {
    min-height: calc(64px + var(--safe-top));
  }

  .reader-view[data-reader-view="single"] .page-sheet:not(.measure-page) {
    padding-inline: var(--reader-page-inline-padding);
    padding-block: var(--reader-page-block-padding);
  }

  .reader-view[data-reader-view="single"] .measure-page {
    width: 100vw;
    height: calc(100dvh - 64px - 54px - var(--safe-top) - var(--safe-bottom));
    padding-inline: var(--reader-page-inline-padding);
    padding-block: var(--reader-page-block-padding);
  }

  .reader-view[data-reader-view="single"] .page-sheet p,
  .reader-view[data-reader-view="single"] .reader-block-paragraph,
  .reader-view[data-reader-view="single"] .reader-block-quote,
  .reader-view[data-reader-view="single"] .reader-block-list,
  .reader-view[data-reader-view="single"] .reader-block-body {
    font-size: min(var(--reader-font-size), 22px);
  }

  .reader-view #readerLayoutButton { display: none; }
  .reader-view .page-controls button { width: 38px; }
  .reader-view .reader-footer { min-height: calc(54px + var(--safe-bottom)); }
  .reader-view .progress-track { width: calc(100vw - 36px); }
}

@media (prefers-reduced-motion: reduce) {
  .reader-view .settings-drawer,
  .reader-view .page-controls button {
    transition: none !important;
  }
}