:root {
  --reader-ink: #f8f8f8;
  --reader-bg: #111;
  --reader-line: #363636;
  --reader-header-height: 62px;
  --reader-font: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic",
    Meiryo, sans-serif;
  --reader-din-font: "DIN Alternate", "DIN Condensed", Bahnschrift, Arial,
    "Helvetica Neue", var(--reader-font);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  height: 100%;
}

.reader-body {
  margin: 0;
  overflow: hidden;
  color: var(--reader-ink);
  background: var(--reader-bg);
  font-family: var(--reader-font);
}

button,
a {
  font: inherit;
}

.reader-header,
.language-switch,
.transcript-kicker,
h1,
h2,
h3,
h4 {
  font-family: var(--reader-din-font);
}

button:focus-visible,
a:focus-visible {
  outline: 3px solid #fff;
  outline-offset: 3px;
}

.reader-shell {
  display: grid;
  grid-template-rows: var(--reader-header-height) minmax(0, 1fr);
  height: 100dvh;
}

.reader-header {
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-width: 0;
  padding: env(safe-area-inset-top) max(14px, env(safe-area-inset-right)) 0 max(14px, env(safe-area-inset-left));
  border-bottom: 1px solid var(--reader-line);
  background: #111;
}

.reader-back {
  display: inline-flex;
  align-items: center;
  min-width: 0;
  gap: 10px;
  color: inherit;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}

.reader-back-arrow {
  font-size: 1.45rem;
  line-height: 1;
}

.reader-tabs {
  display: flex;
  align-self: stretch;
}

.reader-controls {
  display: flex;
  align-items: stretch;
  align-self: stretch;
  gap: 8px;
}

.translation-toggle {
  align-self: center;
  min-width: 44px;
  min-height: 40px;
  padding: 6px 8px;
  border: 1px solid #666;
  border-radius: 5px;
  color: #eee;
  background: transparent;
  cursor: pointer;
  font-size: 0.85rem;
}

.translation-toggle[aria-pressed="true"] {
  color: #111;
  background: #fff;
  border-color: #fff;
}

.translation-toggle[hidden],
.translation-overlay[hidden] {
  display: none;
}

.translation-overlay {
  position: absolute;
  inset: auto 0 0;
  z-index: 4;
  display: flex;
  flex-direction: column;
  height: 50%;
  padding: 16px max(20px, env(safe-area-inset-right)) max(12px, env(safe-area-inset-bottom)) max(20px, env(safe-area-inset-left));
  border-top: 1px solid rgb(255 255 255 / 25%);
  color: #fff;
  background: rgb(0 0 0 / 80%);
  user-select: text;
  -webkit-user-select: text;
  transition: transform 200ms ease;
}

.translation-collapse {
  position: absolute;
  top: 12px;
  right: max(12px, env(safe-area-inset-right));
  z-index: 1;
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid #888;
  border-radius: 5px;
  color: #fff;
  background: rgb(0 0 0 / 80%);
  font-size: 1.4rem;
  line-height: 1;
  cursor: pointer;
  pointer-events: auto;
}

.translation-overlay.is-collapsed {
  transform: translateY(calc(100% - 68px - env(safe-area-inset-bottom)));
  border-top-color: transparent;
  background: transparent;
  pointer-events: none;
}

.translation-overlay.is-collapsed > :not(.translation-collapse) {
  display: none;
}

.translation-overlay h2,
.translation-languages,
.translation-log,
.translation-navigation {
  width: min(100%, 720px);
  margin-inline: auto;
}

.translation-languages {
  display: flex;
  flex: 0 0 auto;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 10px;
  padding-right: 48px;
}

.translation-languages button {
  min-height: 36px;
  padding: 4px 12px;
  border: 1px solid #888;
  border-radius: 4px;
  color: #fff;
  background: transparent;
  cursor: pointer;
  font-size: 0.85rem;
}

.translation-languages button[aria-pressed="true"] {
  color: #111;
  background: #fff;
}

.translation-overlay h2 {
  flex: 0 0 auto;
  margin-block: 0 12px;
  color: #ddd;
  font-size: 0.85rem;
  font-weight: 400;
}

.translation-log {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  font-family: var(--reader-font);
  font-size: clamp(0.95rem, 2.5vw, 1.1rem);
  line-height: 1.65;
}

.translation-log p {
  margin: 0 0 16px;
}

.translation-log strong {
  font-size: 0.85em;
  color: #ddd;
}

.translation-navigation {
  display: flex;
  justify-content: space-between;
  flex: 0 0 auto;
  gap: 16px;
  padding-top: 8px;
}

.translation-navigation button {
  min-height: 36px;
  padding: 4px 10px;
  border: 1px solid #777;
  border-radius: 4px;
  color: #fff;
  background: rgb(0 0 0 / 20%);
  cursor: pointer;
}

.translation-navigation button:disabled {
  opacity: 0.3;
  cursor: default;
}

.reader-tab {
  position: relative;
  min-width: 68px;
  padding: 0 13px;
  border: 0;
  color: #999;
  background: transparent;
  cursor: pointer;
  font-weight: 700;
}

.reader-tab::after {
  position: absolute;
  right: 12px;
  bottom: 0;
  left: 12px;
  height: 3px;
  background: #fff;
  content: "";
  opacity: 0;
}

.reader-tab.is-active {
  color: #fff;
}

.reader-tab.is-active::after {
  opacity: 1;
}

.reader-main {
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.reader-panel,
.reader-stage {
  min-width: 0;
  min-height: 0;
  height: 100%;
}

.reader-panel[hidden] {
  display: none;
}

.reader-stage {
  position: relative;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: #1b1b1b;
  user-select: none;
  -webkit-user-select: none;
}

.reader-image {
  position: absolute;
  inset: 0;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  pointer-events: none;
  -webkit-user-drag: none;
}

.page-zone {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 50%;
  padding: 0;
  border: 0;
  color: #111;
  background: transparent;
  cursor: pointer;
}

.page-zone--next {
  left: 0;
  text-align: left;
}

.page-zone--previous {
  right: 0;
  text-align: right;
}

.page-zone span {
  display: inline-grid;
  place-items: center;
  width: 38px;
  height: 56px;
  margin: 0 10px;
  border-radius: 999px;
  background: rgb(255 255 255 / 78%);
  font-size: 2.2rem;
  line-height: 1;
  opacity: 0.24;
  transition: opacity 160ms ease, transform 160ms ease;
}

.page-zone:hover span,
.page-zone:focus-visible span {
  opacity: 0.9;
  transform: scale(1.05);
}

.page-zone:disabled {
  cursor: default;
}

.page-zone:disabled span {
  opacity: 0;
}

.page-status {
  position: absolute;
  bottom: max(12px, env(safe-area-inset-bottom));
  left: 50%;
  z-index: 3;
  padding: 5px 12px;
  border-radius: 999px;
  color: #fff;
  background: rgb(0 0 0 / 62%);
  font-size: 0.8rem;
  pointer-events: none;
  transform: translateX(-50%);
}

.reader-panel--text {
  overflow: auto;
  color: #111;
  background: #fff;
  overscroll-behavior: contain;
}

.transcript-shell {
  width: min(100%, 820px);
  margin: 0 auto;
  padding: clamp(28px, 6vw, 64px) clamp(20px, 6vw, 64px) 96px;
}

.transcript-toolbar {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 28px;
  padding-bottom: 30px;
  border-bottom: 2px solid #111;
}

.transcript-kicker {
  margin: 0 0 6px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.transcript-toolbar h1 {
  margin: 0 0 12px;
  font-size: clamp(1.8rem, 6vw, 3.2rem);
  line-height: 1.1;
}

.transcript-toolbar p:last-child {
  max-width: 32rem;
  margin: 0;
  line-height: 1.7;
}

.transcript-actions {
  display: grid;
  flex: 0 0 auto;
  gap: 10px;
}

.language-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding: 3px;
  border: 1px solid #111;
  border-radius: 999px;
}

.language-button {
  min-width: 84px;
  padding: 8px 12px;
  border: 0;
  border-radius: 999px;
  color: #555;
  background: transparent;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
}

.language-button.is-active {
  color: #fff;
  background: #111;
}

.language-button:focus-visible {
  outline-color: #111;
}

.copy-button {
  flex: 0 0 auto;
  padding: 12px 18px;
  border: 2px solid #111;
  border-radius: 999px;
  color: #fff;
  background: #111;
  cursor: pointer;
  font-weight: 700;
}

.copy-button:hover {
  color: #111;
  background: #fff;
}

.work-overview,
.transcript-page {
  padding: 32px 0;
  border-bottom: 1px solid #cfcfcf;
}

.transcript h2 {
  margin: 0 0 18px;
  font-size: 1.25rem;
}

.transcript h3 {
  margin: 0 0 18px;
  font-size: 1.05rem;
}

.work-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 28px;
  margin: 0;
  padding: 0;
  list-style: none;
  line-height: 1.7;
}

.panel-block {
  margin: 22px 0;
  padding: 22px clamp(18px, 4vw, 28px);
  border-left: 4px solid #111;
  background: #f5f5f5;
}

.page-note {
  margin-bottom: 26px !important;
  padding: 18px 20px;
  border: 1px solid #bbb;
  background: #fff;
}

.transcript p {
  margin: 0 0 10px;
  line-height: 1.8;
}

.transcript[hidden] {
  display: none;
}

@media (max-width: 540px) {
  :root {
    --reader-header-height: 58px;
  }

  .reader-back {
    gap: 7px;
    font-size: 0.93rem;
  }

  .reader-header {
    gap: 6px;
    padding-inline: max(8px, env(safe-area-inset-left)) max(8px, env(safe-area-inset-right));
  }

  .reader-back > span:last-child {
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .reader-controls {
    flex: 0 0 auto;
    gap: 4px;
  }

  .reader-tab {
    min-width: 44px;
    padding-inline: 6px;
    font-size: 0.85rem;
  }

  .page-zone span {
    width: 30px;
    height: 48px;
    margin-inline: 6px;
    font-size: 1.8rem;
  }

  .transcript-toolbar {
    display: block;
  }

  .copy-button {
    width: 100%;
  }

  .transcript-actions {
    margin-top: 22px;
  }

  .language-button {
    min-width: 0;
  }

  .work-meta {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-zone span,
  .translation-overlay {
    transition: none;
  }
}